From 400d5003a3c4043cfbe4043bbaede34be15b4cb5 Mon Sep 17 00:00:00 2001
From: Sergey Solovyev <se.solovyev@gmail.com>
Date: Mon, 14 Jan 2013 14:00:21 +0400
Subject: [PATCH] new plotter

---
 android-app-core/res/values/arrays.xml        |  36 ++++
 android-app-core/res/values/text_strings.xml  |   8 +
 .../calculator/CalculatorPreferences.java     |   6 +-
 .../plot/AndroidCalculatorPlotter.java        |  17 +-
 android-app/AndroidManifest.xml               |   1 +
 android-app/project.properties                |  28 +--
 ...lot_fragment.xml => cpp_plot_fragment.xml} |   0
 .../layout/cpp_plot_function_list_item.xml    |   9 +-
 .../cpp_plot_function_settings_dialog.xml     |  10 ++
 .../cpp_plot_function_settings_fragment.xml   |  44 +++++
 ...nt.xml => cpp_plot_functions_fragment.xml} |  10 +-
 android-app/res/values/arrays.xml             |  15 --
 android-app/res/xml/preferences_plot.xml      |   8 +-
 .../calculator/CalculatorActivity.java        |   1 -
 .../calculator/CalculatorActivityHelper.java  |   1 -
 .../CalculatorActivityHelperImpl.java         |   1 -
 .../calculator/CalculatorFragment.java        |   1 -
 .../{about => }/CalculatorFragmentType.java   |  15 +-
 .../calculator/CalculatorListFragment.java    |   1 -
 .../about/CalculatorAboutActivity.java        |   1 +
 .../about/CalculatorAboutFragment.java        |   1 +
 .../about/CalculatorReleaseNotesFragment.java |   1 +
 .../help/CalculatorHelpActivity.java          |   2 +-
 .../help/CalculatorHelpFaqFragment.java       |   2 +-
 .../help/CalculatorHelpHintsFragment.java     |   2 +-
 .../help/CalculatorHelpScreensFragment.java   |   2 +-
 .../AbstractCalculatorHistoryFragment.java    |   2 +-
 .../history/CalculatorHistoryActivity.java    |   2 +-
 .../history/CalculatorHistoryFragment.java    |   2 +-
 .../CalculatorSavedHistoryFragment.java       |   2 +-
 .../edit/AbstractMathEntityListFragment.java  |   2 +-
 .../edit/CalculatorFunctionsActivity.java     |   2 +-
 .../edit/CalculatorFunctionsFragment.java     |   2 +-
 .../edit/CalculatorOperatorsActivity.java     |   2 +-
 .../edit/CalculatorOperatorsFragment.java     |   2 +-
 .../math/edit/CalculatorVarsActivity.java     |   2 +-
 .../math/edit/CalculatorVarsFragment.java     |   2 +-
 .../matrix/CalculatorMatrixActivity.java      |   2 +-
 .../matrix/CalculatorMatrixEditFragment.java  |   2 +-
 .../plot/AbstractCalculatorPlotFragment.java  |  16 +-
 .../calculator/plot/ArityPlotFunction.java    |   8 +-
 .../plot/CalculatorArityPlotFragment.java     |   4 +-
 .../plot/CalculatorPlotActivity.java          |   2 +-
 ...alculatorPlotFunctionSettingsActivity.java | 166 ++++++++++++++++++
 .../plot/CalculatorPlotFunctionsActivity.java |  34 ++++
 .../plot/CalculatorPlotFunctionsFragment.java |  37 ----
 .../android/calculator/plot/Graph3d.java      |   6 +-
 .../calculator/plot/PlotFunctionListItem.java |  15 +-
 .../android/fragments/FragmentUtils.java      |  19 +-
 .../calculator/plot/CalculatorPlotter.java    |  12 +-
 .../plot/CalculatorPlotterImpl.java           |  27 ++-
 .../android/calculator/plot/PlotFunction.java |  14 +-
 .../calculator/plot/PlotFunctionLineDef.java  |  96 ----------
 ...GraphLineColor.java => PlotLineColor.java} |  17 +-
 ...eColorType.java => PlotLineColorType.java} |   6 +-
 .../android/calculator/plot/PlotLineDef.java  | 137 +++++++++++++++
 .../android/calculator/plot/XyFunction.java   |  31 ++--
 57 files changed, 625 insertions(+), 271 deletions(-)
 create mode 100644 android-app-core/res/values/arrays.xml
 rename android-app/res/layout/{plot_fragment.xml => cpp_plot_fragment.xml} (100%)
 rename {android-app-core => android-app}/res/layout/cpp_plot_function_list_item.xml (74%)
 create mode 100644 android-app/res/layout/cpp_plot_function_settings_dialog.xml
 create mode 100644 android-app/res/layout/cpp_plot_function_settings_fragment.xml
 rename android-app/res/layout/{plot_functions_fragment.xml => cpp_plot_functions_fragment.xml} (82%)
 rename android-app/src/main/java/org/solovyev/android/calculator/{about => }/CalculatorFragmentType.java (81%)
 create mode 100644 android-app/src/main/java/org/solovyev/android/calculator/plot/CalculatorPlotFunctionSettingsActivity.java
 delete mode 100644 android-app/src/main/java/org/solovyev/android/calculator/plot/CalculatorPlotFunctionsFragment.java
 rename {android-app-core => android-app}/src/main/java/org/solovyev/android/calculator/plot/PlotFunctionListItem.java (85%)
 delete mode 100644 core/src/main/java/org/solovyev/android/calculator/plot/PlotFunctionLineDef.java
 rename core/src/main/java/org/solovyev/android/calculator/plot/{GraphLineColor.java => PlotLineColor.java} (55%)
 rename core/src/main/java/org/solovyev/android/calculator/plot/{PlotFunctionLineColorType.java => PlotLineColorType.java} (61%)
 create mode 100644 core/src/main/java/org/solovyev/android/calculator/plot/PlotLineDef.java

diff --git a/android-app-core/res/values/arrays.xml b/android-app-core/res/values/arrays.xml
new file mode 100644
index 00000000..9e386e2c
--- /dev/null
+++ b/android-app-core/res/values/arrays.xml
@@ -0,0 +1,36 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+	<!--
+	 monochrome,
+    dashed,
+    dotted,
+    dash_dotted;
+	-->
+	<string-array name="cpp_plot_line_style_names">
+		<item>@string/cpp_solid_line_style</item>
+		<item>@string/cpp_dashed_line_style</item>
+		<item>@string/cpp_dotted_line_style</item>
+		<item>@string/cpp_dash_dotted_line_style</item>
+	</string-array>
+
+	<string-array name="cpp_plot_line_color_type_names">
+		<item>@string/cpp_monochrome_line_color_type</item>
+		<item>@string/cpp_color_map_line_color_type</item>
+	</string-array>
+
+	<string-array name="cpp_plot_line_color_names">
+		<item>@string/p_white_line_color</item>
+		<item>@string/p_grey_line_color</item>
+		<item>@string/p_red_line_color</item>
+		<item>@string/p_blue_line_color</item>
+		<item>@string/p_green_line_color</item>
+	</string-array>
+	<string-array name="cpp_plot_line_color_values">
+		<item>white</item>
+		<item>grey</item>
+		<item>red</item>
+		<item>blue</item>
+		<item>green</item>
+	</string-array>
+
+</resources>
\ No newline at end of file
diff --git a/android-app-core/res/values/text_strings.xml b/android-app-core/res/values/text_strings.xml
index 4865d4cb..fe48e74f 100644
--- a/android-app-core/res/values/text_strings.xml
+++ b/android-app-core/res/values/text_strings.xml
@@ -289,5 +289,13 @@
     <string name="cpp_prefs_graph_plot_imag_title">Plot imaginary part of function</string>
     <string name="cpp_prefs_graph_plot_imag_summary">If checked imaginary part of function will be plotted</string>
 
+    <string name="cpp_monochrome_line_color_type">Monochrome</string>
+    <string name="cpp_color_map_line_color_type">Color map</string>
+
+    <string name="cpp_solid_line_style">Solid (-----)</string>
+    <string name="cpp_dashed_line_style">Dashed (- - -)</string>
+    <string name="cpp_dotted_line_style">Dotted (. . .)</string>
+    <string name="cpp_dash_dotted_line_style">Dash dotted (-.-.-)</string>
+
 
 </resources>
\ No newline at end of file
diff --git a/android-app-core/src/main/java/org/solovyev/android/calculator/CalculatorPreferences.java b/android-app-core/src/main/java/org/solovyev/android/calculator/CalculatorPreferences.java
index 0aee0bcf..11d6da38 100644
--- a/android-app-core/src/main/java/org/solovyev/android/calculator/CalculatorPreferences.java
+++ b/android-app-core/src/main/java/org/solovyev/android/calculator/CalculatorPreferences.java
@@ -7,7 +7,7 @@ import org.jetbrains.annotations.NotNull;
 import org.solovyev.android.AndroidUtils;
 import org.solovyev.android.calculator.math.MathType;
 import org.solovyev.android.calculator.model.AndroidCalculatorEngine;
-import org.solovyev.android.calculator.plot.GraphLineColor;
+import org.solovyev.android.calculator.plot.PlotLineColor;
 import org.solovyev.android.prefs.BooleanPreference;
 import org.solovyev.android.prefs.IntegerPreference;
 import org.solovyev.android.prefs.LongPreference;
@@ -132,8 +132,8 @@ public final class CalculatorPreferences {
 
     public static class Graph {
         public static final Preference<Boolean> interpolate = new BooleanPreference("graph_interpolate", true);
-        public static final Preference<GraphLineColor> lineColorReal = StringPreference.newInstance("graph_line_color_real", GraphLineColor.white, GraphLineColor.class);
-        public static final Preference<GraphLineColor> lineColorImag = StringPreference.newInstance("graph_line_color_imag", GraphLineColor.blue, GraphLineColor.class);
+        public static final Preference<PlotLineColor> lineColorReal = StringPreference.newInstance("graph_line_color_real", PlotLineColor.white, PlotLineColor.class);
+        public static final Preference<PlotLineColor> lineColorImag = StringPreference.newInstance("graph_line_color_imag", PlotLineColor.blue, PlotLineColor.class);
         public static final Preference<Boolean> plotImag = new BooleanPreference("graph_plot_imag", false);
     }
 
diff --git a/android-app-core/src/main/java/org/solovyev/android/calculator/plot/AndroidCalculatorPlotter.java b/android-app-core/src/main/java/org/solovyev/android/calculator/plot/AndroidCalculatorPlotter.java
index f19e9b49..fcfe0842 100644
--- a/android-app-core/src/main/java/org/solovyev/android/calculator/plot/AndroidCalculatorPlotter.java
+++ b/android-app-core/src/main/java/org/solovyev/android/calculator/plot/AndroidCalculatorPlotter.java
@@ -5,6 +5,7 @@ import android.content.SharedPreferences;
 import android.preference.PreferenceManager;
 import jscl.math.Generic;
 import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
 import org.solovyev.android.calculator.CalculatorPreferences;
 
 import java.util.List;
@@ -53,7 +54,7 @@ public class AndroidCalculatorPlotter implements CalculatorPlotter, SharedPrefer
     }
 
     @Override
-    public boolean addFunction(@NotNull XyFunction xyFunction, @NotNull PlotFunctionLineDef functionLineDef) {
+    public boolean addFunction(@NotNull XyFunction xyFunction, @NotNull PlotLineDef functionLineDef) {
         return plotter.addFunction(xyFunction, functionLineDef);
     }
 
@@ -63,7 +64,7 @@ public class AndroidCalculatorPlotter implements CalculatorPlotter, SharedPrefer
     }
 
     @Override
-    public boolean updateFunction(@NotNull XyFunction xyFunction, @NotNull PlotFunctionLineDef functionLineDef) {
+    public boolean updateFunction(@NotNull XyFunction xyFunction, @NotNull PlotLineDef functionLineDef) {
         return plotter.updateFunction(xyFunction, functionLineDef);
     }
 
@@ -106,7 +107,13 @@ public class AndroidCalculatorPlotter implements CalculatorPlotter, SharedPrefer
         plotter.clearAllFunctions();
     }
 
-    @Override
+	@Nullable
+	@Override
+	public PlotFunction getFunctionById(@NotNull String functionId) {
+		return plotter.getFunctionById(functionId);
+	}
+
+	@Override
     @NotNull
     public List<PlotFunction> getFunctions() {
         return plotter.getFunctions();
@@ -168,11 +175,11 @@ public class AndroidCalculatorPlotter implements CalculatorPlotter, SharedPrefer
         }
     }
 
-    public void setImagLineColor(@NotNull GraphLineColor imagLineColor) {
+    public void setImagLineColor(@NotNull PlotLineColor imagLineColor) {
         plotter.setImagLineColor(imagLineColor);
     }
 
-    public void setRealLineColor(@NotNull GraphLineColor realLineColor) {
+    public void setRealLineColor(@NotNull PlotLineColor realLineColor) {
         plotter.setRealLineColor(realLineColor);
     }
 }
diff --git a/android-app/AndroidManifest.xml b/android-app/AndroidManifest.xml
index 08d16d36..4b1d1037 100644
--- a/android-app/AndroidManifest.xml
+++ b/android-app/AndroidManifest.xml
@@ -53,6 +53,7 @@
 
         <activity android:label="@string/c_plot_graph" android:name=".plot.CalculatorPlotActivity"/>
         <activity android:label="@string/c_plot_graph" android:name=".plot.CalculatorPlotFunctionsActivity" android:theme="@style/cpp_gray_dialog_theme"/>
+        <activity android:label="@string/c_plot_graph" android:name=".plot.CalculatorPlotFunctionSettingsActivity" android:theme="@style/cpp_gray_dialog_theme"/>
 
         <!-- todo serso: strings-->
         <activity android:label="@string/c_plot_graph" android:name=".matrix.CalculatorMatrixActivity"/>
diff --git a/android-app/project.properties b/android-app/project.properties
index 542cf64d..1b8a55be 100644
--- a/android-app/project.properties
+++ b/android-app/project.properties
@@ -12,19 +12,19 @@ target=android-15
 android.library.reference.1=../android-app-core
 android.library.reference.2=../android-app-widget
 android.library.reference.3=../android-app-onscreen
-android.library.reference.4=gen-external-apklibs/org.solovyev.android_android-common-all_1.0.6
-android.library.reference.5=gen-external-apklibs/org.solovyev.android_android-common-ads_1.0.6
-android.library.reference.6=gen-external-apklibs/org.solovyev.android_android-common-core_1.0.6
-android.library.reference.7=gen-external-apklibs/org.solovyev.android_android-common-billing_1.0.6
-android.library.reference.8=gen-external-apklibs/org.solovyev.android_android-common-db_1.0.6
-android.library.reference.9=gen-external-apklibs/org.solovyev.android_android-common-http_1.0.6
-android.library.reference.10=gen-external-apklibs/org.solovyev.android_android-common-list_1.0.6
-android.library.reference.11=gen-external-apklibs/org.solovyev.android_android-common-view_1.0.6
-android.library.reference.12=gen-external-apklibs/org.solovyev.android_android-common-preferences_1.0.6
-android.library.reference.13=gen-external-apklibs/org.solovyev.android_android-common-menu_1.0.6
-android.library.reference.14=gen-external-apklibs/org.solovyev.android_android-common-other_1.0.6
-android.library.reference.15=gen-external-apklibs/org.solovyev.android_android-common-sherlock_1.0.6
-android.library.reference.16=gen-external-apklibs/com.actionbarsherlock_actionbarsherlock_4.2.0
-android.library.reference.17=gen-external-apklibs/org.solovyev.android_android-common-keyboard_1.0.6
+android.library.reference.4=../android-app-core/gen-external-apklibs/org.solovyev.android_android-common-all_1.0.6
+android.library.reference.5=../android-app-core/gen-external-apklibs/org.solovyev.android_android-common-ads_1.0.6
+android.library.reference.6=../android-app-core/gen-external-apklibs/org.solovyev.android_android-common-core_1.0.6
+android.library.reference.7=../android-app-core/gen-external-apklibs/org.solovyev.android_android-common-billing_1.0.6
+android.library.reference.8=../android-app-core/gen-external-apklibs/org.solovyev.android_android-common-db_1.0.6
+android.library.reference.9=../android-app-core/gen-external-apklibs/org.solovyev.android_android-common-http_1.0.6
+android.library.reference.10=../android-app-core/gen-external-apklibs/org.solovyev.android_android-common-list_1.0.6
+android.library.reference.11=../android-app-core/gen-external-apklibs/org.solovyev.android_android-common-view_1.0.6
+android.library.reference.12=../android-app-core/gen-external-apklibs/org.solovyev.android_android-common-preferences_1.0.6
+android.library.reference.13=../android-app-core/gen-external-apklibs/org.solovyev.android_android-common-menu_1.0.6
+android.library.reference.14=../android-app-core/gen-external-apklibs/org.solovyev.android_android-common-other_1.0.6
+android.library.reference.15=../android-app-core/gen-external-apklibs/org.solovyev.android_android-common-sherlock_1.0.6
+android.library.reference.16=../android-app-core/gen-external-apklibs/com.actionbarsherlock_actionbarsherlock_4.2.0
+android.library.reference.17=../android-app-core/gen-external-apklibs/org.solovyev.android_android-common-keyboard_1.0.6
 
 
diff --git a/android-app/res/layout/plot_fragment.xml b/android-app/res/layout/cpp_plot_fragment.xml
similarity index 100%
rename from android-app/res/layout/plot_fragment.xml
rename to android-app/res/layout/cpp_plot_fragment.xml
diff --git a/android-app-core/res/layout/cpp_plot_function_list_item.xml b/android-app/res/layout/cpp_plot_function_list_item.xml
similarity index 74%
rename from android-app-core/res/layout/cpp_plot_function_list_item.xml
rename to android-app/res/layout/cpp_plot_function_list_item.xml
index 8c594072..ac16cb80 100644
--- a/android-app-core/res/layout/cpp_plot_function_list_item.xml
+++ b/android-app/res/layout/cpp_plot_function_list_item.xml
@@ -9,7 +9,7 @@
         a:id="@+id/cpp_plot_function_expression_textview"
         a:layout_width="0dp"
         a:layout_height="wrap_content"
-        a:layout_weight="5"/>
+        a:layout_weight="3"/>
 
     <CheckBox
         a:id="@+id/cpp_plot_function_pinned_checkbox"
@@ -23,4 +23,11 @@
         a:layout_height="wrap_content"
         a:layout_weight="1"/>
 
+	<ImageButton
+			a:id="@+id/cpp_plot_function_settings_button"
+			a:layout_width="0dp"
+			a:layout_height="wrap_content"
+			a:layout_weight="1"
+			a:src="@drawable/ab_settings"/>
+
 </LinearLayout>
\ No newline at end of file
diff --git a/android-app/res/layout/cpp_plot_function_settings_dialog.xml b/android-app/res/layout/cpp_plot_function_settings_dialog.xml
new file mode 100644
index 00000000..742f0b5c
--- /dev/null
+++ b/android-app/res/layout/cpp_plot_function_settings_dialog.xml
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<LinearLayout xmlns:a="http://schemas.android.com/apk/res/android"
+    a:layout_width="wrap_content"
+    a:layout_height="wrap_content"
+    a:id="@+id/dialog_layout"
+    style="?cpp_dialog_style"
+    a:orientation="vertical">
+
+</LinearLayout>
\ No newline at end of file
diff --git a/android-app/res/layout/cpp_plot_function_settings_fragment.xml b/android-app/res/layout/cpp_plot_function_settings_fragment.xml
new file mode 100644
index 00000000..3c7dcf38
--- /dev/null
+++ b/android-app/res/layout/cpp_plot_function_settings_fragment.xml
@@ -0,0 +1,44 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<LinearLayout xmlns:a="http://schemas.android.com/apk/res/android"
+    a:id="@+id/main_fragment_layout"
+    style="?cpp_fragment_layout_style"
+    a:layout_width="match_parent"
+    a:layout_height="match_parent"
+	a:orientation="vertical">
+
+    <include layout="@layout/ad" />
+
+	<TextView a:text="Line color type"
+			  a:layout_width="match_parent"
+			  a:layout_height="wrap_content"/>
+
+	<Spinner a:id="@+id/cpp_plot_function_line_color_type_spinner"
+			 a:entries="@array/cpp_plot_line_color_type_names"
+			 a:layout_width="match_parent"
+			 a:layout_height="wrap_content"/>
+
+	<TextView a:text="Line color"
+			  a:layout_width="match_parent"
+			  a:layout_height="wrap_content"/>
+
+	<Spinner a:id="@+id/cpp_plot_function_line_color_spinner"
+			 a:entries="@array/cpp_plot_line_color_names"
+			 a:layout_width="match_parent"
+			 a:layout_height="wrap_content"/>
+
+	<TextView a:text="Line style"
+			  a:layout_width="match_parent"
+			  a:layout_height="wrap_content"/>
+
+	<Spinner a:id="@+id/cpp_plot_function_line_style_spinner"
+			 a:entries="@array/cpp_plot_line_style_names"
+			 a:layout_width="match_parent"
+			 a:layout_height="wrap_content"/>
+
+	<Button a:id="@+id/cpp_ok_button"
+			a:text="@string/ok"
+			a:layout_width="match_parent"
+			a:layout_height="wrap_content"/>
+
+</LinearLayout>
\ No newline at end of file
diff --git a/android-app/res/layout/plot_functions_fragment.xml b/android-app/res/layout/cpp_plot_functions_fragment.xml
similarity index 82%
rename from android-app/res/layout/plot_functions_fragment.xml
rename to android-app/res/layout/cpp_plot_functions_fragment.xml
index 951516a4..1a93d806 100644
--- a/android-app/res/layout/plot_functions_fragment.xml
+++ b/android-app/res/layout/cpp_plot_functions_fragment.xml
@@ -6,12 +6,6 @@
     a:layout_width="match_parent"
     a:layout_height="match_parent">
 
-    <TextView
-        a:id="@+id/fragment_title"
-        a:layout_height="wrap_content"
-        a:layout_width="match_parent"
-        style="?cpp_fragment_title_style" />
-
     <include layout="@layout/ad" />
 
     <LinearLayout
@@ -37,6 +31,10 @@
             a:layout_weight="1"
             a:text="Visible"/>
 
+		<TextView
+				a:layout_width="0dp"
+				a:layout_height="wrap_content"
+				a:layout_weight="1"/>
 
     </LinearLayout>
 
diff --git a/android-app/res/values/arrays.xml b/android-app/res/values/arrays.xml
index c0361620..63f8345c 100644
--- a/android-app/res/values/arrays.xml
+++ b/android-app/res/values/arrays.xml
@@ -87,19 +87,4 @@
 		<item>bin</item>
 	</string-array>
 
-    <string-array name="graph_line_color_names">
-        <item>@string/p_white_line_color</item>
-        <item>@string/p_grey_line_color</item>
-        <item>@string/p_red_line_color</item>
-        <item>@string/p_blue_line_color</item>
-        <item>@string/p_green_line_color</item>
-    </string-array>
-    <string-array name="graph_line_color_values">
-        <item>white</item>
-        <item>grey</item>
-        <item>red</item>
-        <item>blue</item>
-        <item>green</item>
-    </string-array>
-
 </resources>
\ No newline at end of file
diff --git a/android-app/res/xml/preferences_plot.xml b/android-app/res/xml/preferences_plot.xml
index 81808993..345e31de 100644
--- a/android-app/res/xml/preferences_plot.xml
+++ b/android-app/res/xml/preferences_plot.xml
@@ -19,14 +19,14 @@
         <ListPreference a:key="graph_line_color_real"
                         a:title="@string/prefs_graph_real_color_title"
                         a:summary="@string/prefs_graph_real_color_summary"
-                        a:entries="@array/graph_line_color_names"
-                        a:entryValues="@array/graph_line_color_values"/>
+                        a:entries="@array/cpp_plot_line_color_names"
+                        a:entryValues="@array/cpp_plot_line_color_values"/>
 
         <ListPreference a:key="graph_line_color_imag"
                         a:title="@string/prefs_graph_imag_color_title"
                         a:summary="@string/prefs_graph_imag_color_summary"
-                        a:entries="@array/graph_line_color_names"
-                        a:entryValues="@array/graph_line_color_values"/>
+                        a:entries="@array/cpp_plot_line_color_names"
+                        a:entryValues="@array/cpp_plot_line_color_values"/>
 
     </PreferenceScreen>
 
diff --git a/android-app/src/main/java/org/solovyev/android/calculator/CalculatorActivity.java b/android-app/src/main/java/org/solovyev/android/calculator/CalculatorActivity.java
index 1aa1cfcd..4e262f7e 100644
--- a/android-app/src/main/java/org/solovyev/android/calculator/CalculatorActivity.java
+++ b/android-app/src/main/java/org/solovyev/android/calculator/CalculatorActivity.java
@@ -23,7 +23,6 @@ import com.actionbarsherlock.app.SherlockFragmentActivity;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.solovyev.android.AndroidUtils;
-import org.solovyev.android.calculator.about.CalculatorFragmentType;
 import org.solovyev.android.calculator.about.CalculatorReleaseNotesFragment;
 import org.solovyev.android.calculator.plot.CalculatorPlotActivity;
 import org.solovyev.android.fragments.FragmentUtils;
diff --git a/android-app/src/main/java/org/solovyev/android/calculator/CalculatorActivityHelper.java b/android-app/src/main/java/org/solovyev/android/calculator/CalculatorActivityHelper.java
index 0cbc2187..e1fd8090 100644
--- a/android-app/src/main/java/org/solovyev/android/calculator/CalculatorActivityHelper.java
+++ b/android-app/src/main/java/org/solovyev/android/calculator/CalculatorActivityHelper.java
@@ -7,7 +7,6 @@ import android.view.View;
 import com.actionbarsherlock.app.SherlockFragmentActivity;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
-import org.solovyev.android.calculator.about.CalculatorFragmentType;
 
 /**
  * User: serso
diff --git a/android-app/src/main/java/org/solovyev/android/calculator/CalculatorActivityHelperImpl.java b/android-app/src/main/java/org/solovyev/android/calculator/CalculatorActivityHelperImpl.java
index c79d319b..b9015a17 100644
--- a/android-app/src/main/java/org/solovyev/android/calculator/CalculatorActivityHelperImpl.java
+++ b/android-app/src/main/java/org/solovyev/android/calculator/CalculatorActivityHelperImpl.java
@@ -19,7 +19,6 @@ import com.actionbarsherlock.app.SherlockFragmentActivity;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.solovyev.android.AndroidUtils;
-import org.solovyev.android.calculator.about.CalculatorFragmentType;
 import org.solovyev.android.sherlock.tabs.ActionBarFragmentTabListener;
 
 /**
diff --git a/android-app/src/main/java/org/solovyev/android/calculator/CalculatorFragment.java b/android-app/src/main/java/org/solovyev/android/calculator/CalculatorFragment.java
index a3a53bd1..f3af186b 100644
--- a/android-app/src/main/java/org/solovyev/android/calculator/CalculatorFragment.java
+++ b/android-app/src/main/java/org/solovyev/android/calculator/CalculatorFragment.java
@@ -7,7 +7,6 @@ import android.view.View;
 import android.view.ViewGroup;
 import com.actionbarsherlock.app.SherlockFragment;
 import org.jetbrains.annotations.NotNull;
-import org.solovyev.android.calculator.about.CalculatorFragmentType;
 
 /**
  * User: Solovyev_S
diff --git a/android-app/src/main/java/org/solovyev/android/calculator/about/CalculatorFragmentType.java b/android-app/src/main/java/org/solovyev/android/calculator/CalculatorFragmentType.java
similarity index 81%
rename from android-app/src/main/java/org/solovyev/android/calculator/about/CalculatorFragmentType.java
rename to android-app/src/main/java/org/solovyev/android/calculator/CalculatorFragmentType.java
index ac0b70ad..3997624f 100644
--- a/android-app/src/main/java/org/solovyev/android/calculator/about/CalculatorFragmentType.java
+++ b/android-app/src/main/java/org/solovyev/android/calculator/CalculatorFragmentType.java
@@ -1,9 +1,9 @@
-package org.solovyev.android.calculator.about;
+package org.solovyev.android.calculator;
 
 import android.support.v4.app.Fragment;
 import org.jetbrains.annotations.NotNull;
-import org.solovyev.android.calculator.CalculatorEditorFragment;
-import org.solovyev.android.calculator.R;
+import org.solovyev.android.calculator.about.CalculatorAboutFragment;
+import org.solovyev.android.calculator.about.CalculatorReleaseNotesFragment;
 import org.solovyev.android.calculator.help.CalculatorHelpFaqFragment;
 import org.solovyev.android.calculator.help.CalculatorHelpHintsFragment;
 import org.solovyev.android.calculator.help.CalculatorHelpScreensFragment;
@@ -14,7 +14,8 @@ import org.solovyev.android.calculator.math.edit.CalculatorOperatorsFragment;
 import org.solovyev.android.calculator.math.edit.CalculatorVarsFragment;
 import org.solovyev.android.calculator.matrix.CalculatorMatrixEditFragment;
 import org.solovyev.android.calculator.plot.CalculatorArityPlotFragment;
-import org.solovyev.android.calculator.plot.CalculatorPlotFunctionsFragment;
+import org.solovyev.android.calculator.plot.CalculatorPlotFunctionSettingsActivity;
+import org.solovyev.android.calculator.plot.CalculatorPlotFunctionsActivity;
 
 /**
  * User: Solovyev_S
@@ -31,10 +32,12 @@ public enum CalculatorFragmentType {
     variables(CalculatorVarsFragment.class, R.layout.vars_fragment, R.string.c_vars),
     functions(CalculatorFunctionsFragment.class, R.layout.math_entities_fragment, R.string.c_functions),
     operators(CalculatorOperatorsFragment.class, R.layout.math_entities_fragment, R.string.c_operators),
-    plotter(CalculatorArityPlotFragment.class, R.layout.plot_fragment, R.string.c_graph),
+    plotter(CalculatorArityPlotFragment.class, R.layout.cpp_plot_fragment, R.string.c_graph),
 
 	// todo serso: strings
-	plotter_functions(CalculatorPlotFunctionsFragment.class, R.layout.plot_functions_fragment, R.string.c_graph),
+	plotter_functions(CalculatorPlotFunctionsActivity.CalculatorPlotFunctionsFragment.class, R.layout.cpp_plot_functions_fragment, R.string.c_graph),
+	plotter_function_settings(CalculatorPlotFunctionSettingsActivity.CalculatorPlotFunctionSettingsFragment.class, R.layout.cpp_plot_function_settings_fragment, R.string.c_graph),
+
     about(CalculatorAboutFragment.class, R.layout.about_fragment, R.string.c_about),
     faq(CalculatorHelpFaqFragment.class, R.layout.help_faq_fragment, R.string.c_faq),
     hints(CalculatorHelpHintsFragment.class, R.layout.help_hints_fragment, R.string.c_hints),
diff --git a/android-app/src/main/java/org/solovyev/android/calculator/CalculatorListFragment.java b/android-app/src/main/java/org/solovyev/android/calculator/CalculatorListFragment.java
index e5a0bfa5..c9bba456 100644
--- a/android-app/src/main/java/org/solovyev/android/calculator/CalculatorListFragment.java
+++ b/android-app/src/main/java/org/solovyev/android/calculator/CalculatorListFragment.java
@@ -7,7 +7,6 @@ import android.view.View;
 import android.view.ViewGroup;
 import com.actionbarsherlock.app.SherlockListFragment;
 import org.jetbrains.annotations.NotNull;
-import org.solovyev.android.calculator.about.CalculatorFragmentType;
 
 /**
  * User: Solovyev_S
diff --git a/android-app/src/main/java/org/solovyev/android/calculator/about/CalculatorAboutActivity.java b/android-app/src/main/java/org/solovyev/android/calculator/about/CalculatorAboutActivity.java
index 6f9d2c66..735cb517 100644
--- a/android-app/src/main/java/org/solovyev/android/calculator/about/CalculatorAboutActivity.java
+++ b/android-app/src/main/java/org/solovyev/android/calculator/about/CalculatorAboutActivity.java
@@ -8,6 +8,7 @@ package org.solovyev.android.calculator.about;
 import android.os.Bundle;
 import org.jetbrains.annotations.Nullable;
 import org.solovyev.android.calculator.CalculatorFragmentActivity;
+import org.solovyev.android.calculator.CalculatorFragmentType;
 import org.solovyev.android.calculator.R;
 
 /**
diff --git a/android-app/src/main/java/org/solovyev/android/calculator/about/CalculatorAboutFragment.java b/android-app/src/main/java/org/solovyev/android/calculator/about/CalculatorAboutFragment.java
index 1968eedd..2bba5084 100644
--- a/android-app/src/main/java/org/solovyev/android/calculator/about/CalculatorAboutFragment.java
+++ b/android-app/src/main/java/org/solovyev/android/calculator/about/CalculatorAboutFragment.java
@@ -11,6 +11,7 @@ import android.text.method.LinkMovementMethod;
 import android.view.View;
 import android.widget.TextView;
 import org.solovyev.android.calculator.CalculatorFragment;
+import org.solovyev.android.calculator.CalculatorFragmentType;
 import org.solovyev.android.calculator.R;
 
 /**
diff --git a/android-app/src/main/java/org/solovyev/android/calculator/about/CalculatorReleaseNotesFragment.java b/android-app/src/main/java/org/solovyev/android/calculator/about/CalculatorReleaseNotesFragment.java
index 24c9b8ad..56754d85 100644
--- a/android-app/src/main/java/org/solovyev/android/calculator/about/CalculatorReleaseNotesFragment.java
+++ b/android-app/src/main/java/org/solovyev/android/calculator/about/CalculatorReleaseNotesFragment.java
@@ -16,6 +16,7 @@ import org.jetbrains.annotations.NotNull;
 import org.solovyev.android.AndroidUtils;
 import org.solovyev.android.calculator.CalculatorApplication;
 import org.solovyev.android.calculator.CalculatorFragment;
+import org.solovyev.android.calculator.CalculatorFragmentType;
 import org.solovyev.android.calculator.R;
 import org.solovyev.common.text.StringUtils;
 
diff --git a/android-app/src/main/java/org/solovyev/android/calculator/help/CalculatorHelpActivity.java b/android-app/src/main/java/org/solovyev/android/calculator/help/CalculatorHelpActivity.java
index 39e65320..974ffff6 100644
--- a/android-app/src/main/java/org/solovyev/android/calculator/help/CalculatorHelpActivity.java
+++ b/android-app/src/main/java/org/solovyev/android/calculator/help/CalculatorHelpActivity.java
@@ -9,8 +9,8 @@ package org.solovyev.android.calculator.help;
 import android.os.Bundle;
 import org.jetbrains.annotations.Nullable;
 import org.solovyev.android.calculator.CalculatorFragmentActivity;
+import org.solovyev.android.calculator.CalculatorFragmentType;
 import org.solovyev.android.calculator.R;
-import org.solovyev.android.calculator.about.CalculatorFragmentType;
 
 /**
  * User: serso
diff --git a/android-app/src/main/java/org/solovyev/android/calculator/help/CalculatorHelpFaqFragment.java b/android-app/src/main/java/org/solovyev/android/calculator/help/CalculatorHelpFaqFragment.java
index 12d39285..ba5a87a8 100644
--- a/android-app/src/main/java/org/solovyev/android/calculator/help/CalculatorHelpFaqFragment.java
+++ b/android-app/src/main/java/org/solovyev/android/calculator/help/CalculatorHelpFaqFragment.java
@@ -7,7 +7,7 @@
 package org.solovyev.android.calculator.help;
 
 import org.solovyev.android.calculator.CalculatorFragment;
-import org.solovyev.android.calculator.about.CalculatorFragmentType;
+import org.solovyev.android.calculator.CalculatorFragmentType;
 
 /**
  * User: serso
diff --git a/android-app/src/main/java/org/solovyev/android/calculator/help/CalculatorHelpHintsFragment.java b/android-app/src/main/java/org/solovyev/android/calculator/help/CalculatorHelpHintsFragment.java
index 5cebfc86..5e130cc2 100644
--- a/android-app/src/main/java/org/solovyev/android/calculator/help/CalculatorHelpHintsFragment.java
+++ b/android-app/src/main/java/org/solovyev/android/calculator/help/CalculatorHelpHintsFragment.java
@@ -7,7 +7,7 @@
 package org.solovyev.android.calculator.help;
 
 import org.solovyev.android.calculator.CalculatorFragment;
-import org.solovyev.android.calculator.about.CalculatorFragmentType;
+import org.solovyev.android.calculator.CalculatorFragmentType;
 
 /**
  * User: serso
diff --git a/android-app/src/main/java/org/solovyev/android/calculator/help/CalculatorHelpScreensFragment.java b/android-app/src/main/java/org/solovyev/android/calculator/help/CalculatorHelpScreensFragment.java
index d1ebb4de..52e34479 100644
--- a/android-app/src/main/java/org/solovyev/android/calculator/help/CalculatorHelpScreensFragment.java
+++ b/android-app/src/main/java/org/solovyev/android/calculator/help/CalculatorHelpScreensFragment.java
@@ -7,7 +7,7 @@
 package org.solovyev.android.calculator.help;
 
 import org.solovyev.android.calculator.CalculatorFragment;
-import org.solovyev.android.calculator.about.CalculatorFragmentType;
+import org.solovyev.android.calculator.CalculatorFragmentType;
 
 /**
  * User: serso
diff --git a/android-app/src/main/java/org/solovyev/android/calculator/history/AbstractCalculatorHistoryFragment.java b/android-app/src/main/java/org/solovyev/android/calculator/history/AbstractCalculatorHistoryFragment.java
index 7bbe516e..49c6ca98 100644
--- a/android-app/src/main/java/org/solovyev/android/calculator/history/AbstractCalculatorHistoryFragment.java
+++ b/android-app/src/main/java/org/solovyev/android/calculator/history/AbstractCalculatorHistoryFragment.java
@@ -22,7 +22,7 @@ import com.actionbarsherlock.view.MenuItem;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.solovyev.android.calculator.*;
-import org.solovyev.android.calculator.about.CalculatorFragmentType;
+import org.solovyev.android.calculator.CalculatorFragmentType;
 import org.solovyev.android.calculator.jscl.JsclOperation;
 import org.solovyev.android.menu.*;
 import org.solovyev.android.sherlock.menu.SherlockMenuHelper;
diff --git a/android-app/src/main/java/org/solovyev/android/calculator/history/CalculatorHistoryActivity.java b/android-app/src/main/java/org/solovyev/android/calculator/history/CalculatorHistoryActivity.java
index 30896450..2ecc4fd5 100644
--- a/android-app/src/main/java/org/solovyev/android/calculator/history/CalculatorHistoryActivity.java
+++ b/android-app/src/main/java/org/solovyev/android/calculator/history/CalculatorHistoryActivity.java
@@ -11,7 +11,7 @@ import com.actionbarsherlock.app.SherlockFragmentActivity;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.solovyev.android.calculator.*;
-import org.solovyev.android.calculator.about.CalculatorFragmentType;
+import org.solovyev.android.calculator.CalculatorFragmentType;
 
 /**
  * User: serso
diff --git a/android-app/src/main/java/org/solovyev/android/calculator/history/CalculatorHistoryFragment.java b/android-app/src/main/java/org/solovyev/android/calculator/history/CalculatorHistoryFragment.java
index a16aaacd..61b0aeb6 100644
--- a/android-app/src/main/java/org/solovyev/android/calculator/history/CalculatorHistoryFragment.java
+++ b/android-app/src/main/java/org/solovyev/android/calculator/history/CalculatorHistoryFragment.java
@@ -11,7 +11,7 @@ import org.jetbrains.annotations.NotNull;
 import org.solovyev.android.calculator.Locator;
 import org.solovyev.android.calculator.CalculatorPreferences;
 import org.solovyev.android.calculator.R;
-import org.solovyev.android.calculator.about.CalculatorFragmentType;
+import org.solovyev.android.calculator.CalculatorFragmentType;
 
 import java.util.ArrayList;
 import java.util.List;
diff --git a/android-app/src/main/java/org/solovyev/android/calculator/history/CalculatorSavedHistoryFragment.java b/android-app/src/main/java/org/solovyev/android/calculator/history/CalculatorSavedHistoryFragment.java
index c2d26e00..90a1c4c0 100644
--- a/android-app/src/main/java/org/solovyev/android/calculator/history/CalculatorSavedHistoryFragment.java
+++ b/android-app/src/main/java/org/solovyev/android/calculator/history/CalculatorSavedHistoryFragment.java
@@ -7,9 +7,9 @@
 package org.solovyev.android.calculator.history;
 
 import org.jetbrains.annotations.NotNull;
+import org.solovyev.android.calculator.CalculatorFragmentType;
 import org.solovyev.android.calculator.Locator;
 import org.solovyev.android.calculator.R;
-import org.solovyev.android.calculator.about.CalculatorFragmentType;
 
 import java.util.ArrayList;
 import java.util.List;
diff --git a/android-app/src/main/java/org/solovyev/android/calculator/math/edit/AbstractMathEntityListFragment.java b/android-app/src/main/java/org/solovyev/android/calculator/math/edit/AbstractMathEntityListFragment.java
index 8f9f8576..bc80f59f 100644
--- a/android-app/src/main/java/org/solovyev/android/calculator/math/edit/AbstractMathEntityListFragment.java
+++ b/android-app/src/main/java/org/solovyev/android/calculator/math/edit/AbstractMathEntityListFragment.java
@@ -19,7 +19,7 @@ import com.actionbarsherlock.app.SherlockListFragment;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.solovyev.android.calculator.*;
-import org.solovyev.android.calculator.about.CalculatorFragmentType;
+import org.solovyev.android.calculator.CalculatorFragmentType;
 import org.solovyev.android.menu.AMenuBuilder;
 import org.solovyev.android.menu.AMenuItem;
 import org.solovyev.android.menu.LabeledMenuItem;
diff --git a/android-app/src/main/java/org/solovyev/android/calculator/math/edit/CalculatorFunctionsActivity.java b/android-app/src/main/java/org/solovyev/android/calculator/math/edit/CalculatorFunctionsActivity.java
index 77c55249..3ea2c359 100644
--- a/android-app/src/main/java/org/solovyev/android/calculator/math/edit/CalculatorFunctionsActivity.java
+++ b/android-app/src/main/java/org/solovyev/android/calculator/math/edit/CalculatorFunctionsActivity.java
@@ -13,7 +13,7 @@ import com.actionbarsherlock.app.SherlockFragmentActivity;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.solovyev.android.calculator.*;
-import org.solovyev.android.calculator.about.CalculatorFragmentType;
+import org.solovyev.android.calculator.CalculatorFragmentType;
 import org.solovyev.android.calculator.history.CalculatorHistoryActivity;
 
 /**
diff --git a/android-app/src/main/java/org/solovyev/android/calculator/math/edit/CalculatorFunctionsFragment.java b/android-app/src/main/java/org/solovyev/android/calculator/math/edit/CalculatorFunctionsFragment.java
index 68a1d79a..22a1307e 100644
--- a/android-app/src/main/java/org/solovyev/android/calculator/math/edit/CalculatorFunctionsFragment.java
+++ b/android-app/src/main/java/org/solovyev/android/calculator/math/edit/CalculatorFunctionsFragment.java
@@ -20,7 +20,7 @@ import jscl.math.function.IFunction;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.solovyev.android.calculator.*;
-import org.solovyev.android.calculator.about.CalculatorFragmentType;
+import org.solovyev.android.calculator.CalculatorFragmentType;
 import org.solovyev.android.calculator.function.FunctionEditDialogFragment;
 import org.solovyev.android.menu.AMenuItem;
 import org.solovyev.android.menu.LabeledMenuItem;
diff --git a/android-app/src/main/java/org/solovyev/android/calculator/math/edit/CalculatorOperatorsActivity.java b/android-app/src/main/java/org/solovyev/android/calculator/math/edit/CalculatorOperatorsActivity.java
index ec0432d6..ce31edc7 100644
--- a/android-app/src/main/java/org/solovyev/android/calculator/math/edit/CalculatorOperatorsActivity.java
+++ b/android-app/src/main/java/org/solovyev/android/calculator/math/edit/CalculatorOperatorsActivity.java
@@ -11,7 +11,7 @@ import com.actionbarsherlock.app.SherlockFragmentActivity;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.solovyev.android.calculator.*;
-import org.solovyev.android.calculator.about.CalculatorFragmentType;
+import org.solovyev.android.calculator.CalculatorFragmentType;
 import org.solovyev.android.calculator.history.CalculatorHistoryActivity;
 
 /**
diff --git a/android-app/src/main/java/org/solovyev/android/calculator/math/edit/CalculatorOperatorsFragment.java b/android-app/src/main/java/org/solovyev/android/calculator/math/edit/CalculatorOperatorsFragment.java
index fd7938d9..d8672c65 100644
--- a/android-app/src/main/java/org/solovyev/android/calculator/math/edit/CalculatorOperatorsFragment.java
+++ b/android-app/src/main/java/org/solovyev/android/calculator/math/edit/CalculatorOperatorsFragment.java
@@ -8,7 +8,7 @@ import org.jetbrains.annotations.NotNull;
 import org.solovyev.android.calculator.Locator;
 import org.solovyev.android.calculator.CalculatorEventType;
 import org.solovyev.android.calculator.R;
-import org.solovyev.android.calculator.about.CalculatorFragmentType;
+import org.solovyev.android.calculator.CalculatorFragmentType;
 import org.solovyev.android.menu.AMenuItem;
 import org.solovyev.android.menu.LabeledMenuItem;
 import org.solovyev.common.text.StringUtils;
diff --git a/android-app/src/main/java/org/solovyev/android/calculator/math/edit/CalculatorVarsActivity.java b/android-app/src/main/java/org/solovyev/android/calculator/math/edit/CalculatorVarsActivity.java
index e9e93952..c6f4a569 100644
--- a/android-app/src/main/java/org/solovyev/android/calculator/math/edit/CalculatorVarsActivity.java
+++ b/android-app/src/main/java/org/solovyev/android/calculator/math/edit/CalculatorVarsActivity.java
@@ -12,7 +12,7 @@ import com.actionbarsherlock.app.SherlockFragmentActivity;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.solovyev.android.calculator.*;
-import org.solovyev.android.calculator.about.CalculatorFragmentType;
+import org.solovyev.android.calculator.CalculatorFragmentType;
 import org.solovyev.android.calculator.history.CalculatorHistoryActivity;
 import org.solovyev.android.calculator.AndroidVarCategory;
 import org.solovyev.android.calculator.VarCategory;
diff --git a/android-app/src/main/java/org/solovyev/android/calculator/math/edit/CalculatorVarsFragment.java b/android-app/src/main/java/org/solovyev/android/calculator/math/edit/CalculatorVarsFragment.java
index 5ebf84b5..66276187 100644
--- a/android-app/src/main/java/org/solovyev/android/calculator/math/edit/CalculatorVarsFragment.java
+++ b/android-app/src/main/java/org/solovyev/android/calculator/math/edit/CalculatorVarsFragment.java
@@ -17,7 +17,7 @@ import jscl.math.function.IConstant;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.solovyev.android.calculator.*;
-import org.solovyev.android.calculator.about.CalculatorFragmentType;
+import org.solovyev.android.calculator.CalculatorFragmentType;
 import org.solovyev.android.calculator.math.MathType;
 import org.solovyev.android.menu.AMenuItem;
 import org.solovyev.android.menu.LabeledMenuItem;
diff --git a/android-app/src/main/java/org/solovyev/android/calculator/matrix/CalculatorMatrixActivity.java b/android-app/src/main/java/org/solovyev/android/calculator/matrix/CalculatorMatrixActivity.java
index 3ec80741..941a64d8 100644
--- a/android-app/src/main/java/org/solovyev/android/calculator/matrix/CalculatorMatrixActivity.java
+++ b/android-app/src/main/java/org/solovyev/android/calculator/matrix/CalculatorMatrixActivity.java
@@ -3,8 +3,8 @@ package org.solovyev.android.calculator.matrix;
 import android.app.ActionBar;
 import android.os.Bundle;
 import org.solovyev.android.calculator.CalculatorFragmentActivity;
+import org.solovyev.android.calculator.CalculatorFragmentType;
 import org.solovyev.android.calculator.R;
-import org.solovyev.android.calculator.about.CalculatorFragmentType;
 
 /**
  * User: Solovyev_S
diff --git a/android-app/src/main/java/org/solovyev/android/calculator/matrix/CalculatorMatrixEditFragment.java b/android-app/src/main/java/org/solovyev/android/calculator/matrix/CalculatorMatrixEditFragment.java
index 9f8e3c8e..5ca7f521 100644
--- a/android-app/src/main/java/org/solovyev/android/calculator/matrix/CalculatorMatrixEditFragment.java
+++ b/android-app/src/main/java/org/solovyev/android/calculator/matrix/CalculatorMatrixEditFragment.java
@@ -5,8 +5,8 @@ import android.view.View;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.solovyev.android.calculator.CalculatorFragment;
+import org.solovyev.android.calculator.CalculatorFragmentType;
 import org.solovyev.android.calculator.R;
-import org.solovyev.android.calculator.about.CalculatorFragmentType;
 import org.solovyev.android.view.IntegerRange;
 import org.solovyev.android.view.Picker;
 
diff --git a/android-app/src/main/java/org/solovyev/android/calculator/plot/AbstractCalculatorPlotFragment.java b/android-app/src/main/java/org/solovyev/android/calculator/plot/AbstractCalculatorPlotFragment.java
index 9569dad9..592a8e7c 100644
--- a/android-app/src/main/java/org/solovyev/android/calculator/plot/AbstractCalculatorPlotFragment.java
+++ b/android-app/src/main/java/org/solovyev/android/calculator/plot/AbstractCalculatorPlotFragment.java
@@ -80,7 +80,7 @@ public abstract class AbstractCalculatorPlotFragment extends CalculatorFragment
 
 
     public AbstractCalculatorPlotFragment() {
-        super(CalculatorApplication.getInstance().createFragmentHelper(R.layout.plot_fragment, R.string.c_graph, false));
+        super(CalculatorApplication.getInstance().createFragmentHelper(R.layout.cpp_plot_fragment, R.string.c_graph, false));
     }
 
 
@@ -119,7 +119,7 @@ public abstract class AbstractCalculatorPlotFragment extends CalculatorFragment
         plotData = Locator.getInstance().getPlotter().getPlotData();
         createChart(plotData);
         createGraphicalView(getView(), plotData);
-        getActivity().invalidateOptionsMenu();
+        getSherlockActivity().invalidateOptionsMenu();
     }
 
     @Override
@@ -138,7 +138,7 @@ public abstract class AbstractCalculatorPlotFragment extends CalculatorFragment
         getUiHandler().post(new Runnable() {
             @Override
             public void run() {
-                getActivity().invalidateOptionsMenu();
+                getSherlockActivity().invalidateOptionsMenu();
 
                 createChart(plotData);
 
@@ -361,17 +361,17 @@ public abstract class AbstractCalculatorPlotFragment extends CalculatorFragment
         }
     }
 
-    public static void applyToPaint(@NotNull PlotFunctionLineDef plotFunctionLineDef, @NotNull Paint paint) {
-        paint.setColor(plotFunctionLineDef.getLineColor());
+    public static void applyToPaint(@NotNull PlotLineDef plotLineDef, @NotNull Paint paint) {
+        paint.setColor(plotLineDef.getLineColor());
         paint.setStyle(Paint.Style.STROKE);
 
-        if ( plotFunctionLineDef.getLineWidth() == PlotFunctionLineDef.DEFAULT_LINE_WIDTH ) {
+        if ( plotLineDef.getLineWidth() == PlotLineDef.DEFAULT_LINE_WIDTH ) {
             paint.setStrokeWidth(0);
         } else {
-            paint.setStrokeWidth(plotFunctionLineDef.getLineWidth());
+            paint.setStrokeWidth(plotLineDef.getLineWidth());
         }
 
-        final AndroidPlotLineStyle androidPlotLineStyle = AndroidPlotLineStyle.valueOf(plotFunctionLineDef.getLineStyle());
+        final AndroidPlotLineStyle androidPlotLineStyle = AndroidPlotLineStyle.valueOf(plotLineDef.getLineStyle());
         if (androidPlotLineStyle != null) {
             androidPlotLineStyle.applyToPaint(paint);
         }
diff --git a/android-app/src/main/java/org/solovyev/android/calculator/plot/ArityPlotFunction.java b/android-app/src/main/java/org/solovyev/android/calculator/plot/ArityPlotFunction.java
index 2734dff5..ede47c20 100644
--- a/android-app/src/main/java/org/solovyev/android/calculator/plot/ArityPlotFunction.java
+++ b/android-app/src/main/java/org/solovyev/android/calculator/plot/ArityPlotFunction.java
@@ -14,18 +14,18 @@ public class ArityPlotFunction {
     private Function function;
 
     @NotNull
-    private PlotFunctionLineDef lineDef;
+    private PlotLineDef lineDef;
 
     private ArityPlotFunction() {
     }
 
     @NotNull
     public static ArityPlotFunction newInstance(@NotNull Function function) {
-        return newInstance(function, PlotFunctionLineDef.newDefaultInstance());
+        return newInstance(function, PlotLineDef.newDefaultInstance());
     }
 
     @NotNull
-    public static ArityPlotFunction newInstance(@NotNull Function function, @NotNull PlotFunctionLineDef lineDef) {
+    public static ArityPlotFunction newInstance(@NotNull Function function, @NotNull PlotLineDef lineDef) {
         final ArityPlotFunction result = new ArityPlotFunction();
 
         result.function = function;
@@ -40,7 +40,7 @@ public class ArityPlotFunction {
     }
 
     @NotNull
-    public PlotFunctionLineDef getLineDef() {
+    public PlotLineDef getLineDef() {
         return lineDef;
     }
 }
diff --git a/android-app/src/main/java/org/solovyev/android/calculator/plot/CalculatorArityPlotFragment.java b/android-app/src/main/java/org/solovyev/android/calculator/plot/CalculatorArityPlotFragment.java
index 61d27dfb..c664d988 100644
--- a/android-app/src/main/java/org/solovyev/android/calculator/plot/CalculatorArityPlotFragment.java
+++ b/android-app/src/main/java/org/solovyev/android/calculator/plot/CalculatorArityPlotFragment.java
@@ -54,7 +54,7 @@ public class CalculatorArityPlotFragment extends AbstractCalculatorPlotFragment
             final Constant xVariable = xyFunction.getXVariable();
             final Constant yVariable = xyFunction.getYVariable();
 
-            final int arity = xVariable == null ? 0 : (yVariable == null ? 1 : 2);
+            final int arity = xyFunction.getArity();
 
             final Function arityFunction;
             if (xyFunction.isImag()) {
@@ -63,7 +63,7 @@ public class CalculatorArityPlotFragment extends AbstractCalculatorPlotFragment
                 arityFunction = new RealArityFunction(arity, expression, xVariable, yVariable);
             }
 
-            arityFunctions.add(ArityPlotFunction.newInstance(arityFunction, plotFunction.getPlotFunctionLineDef()));
+            arityFunctions.add(ArityPlotFunction.newInstance(arityFunction, plotFunction.getPlotLineDef()));
         }
 
         if ( plotData.isPlot3d() ) {
diff --git a/android-app/src/main/java/org/solovyev/android/calculator/plot/CalculatorPlotActivity.java b/android-app/src/main/java/org/solovyev/android/calculator/plot/CalculatorPlotActivity.java
index cc638b55..3a50b081 100644
--- a/android-app/src/main/java/org/solovyev/android/calculator/plot/CalculatorPlotActivity.java
+++ b/android-app/src/main/java/org/solovyev/android/calculator/plot/CalculatorPlotActivity.java
@@ -6,8 +6,8 @@ import android.os.Bundle;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.solovyev.android.calculator.CalculatorFragmentActivity;
+import org.solovyev.android.calculator.CalculatorFragmentType;
 import org.solovyev.android.calculator.R;
-import org.solovyev.android.calculator.about.CalculatorFragmentType;
 
 /**
  * User: serso
diff --git a/android-app/src/main/java/org/solovyev/android/calculator/plot/CalculatorPlotFunctionSettingsActivity.java b/android-app/src/main/java/org/solovyev/android/calculator/plot/CalculatorPlotFunctionSettingsActivity.java
new file mode 100644
index 00000000..dfbdeee3
--- /dev/null
+++ b/android-app/src/main/java/org/solovyev/android/calculator/plot/CalculatorPlotFunctionSettingsActivity.java
@@ -0,0 +1,166 @@
+package org.solovyev.android.calculator.plot;
+
+import android.app.Activity;
+import android.content.Context;
+import android.content.Intent;
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.AdapterView;
+import android.widget.Button;
+import android.widget.Spinner;
+import com.actionbarsherlock.app.SherlockFragmentActivity;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+import org.solovyev.android.calculator.CalculatorFragment;
+import org.solovyev.android.calculator.CalculatorFragmentType;
+import org.solovyev.android.calculator.Locator;
+import org.solovyev.android.calculator.R;
+import org.solovyev.android.fragments.FragmentUtils;
+
+public class CalculatorPlotFunctionSettingsActivity extends SherlockFragmentActivity {
+
+	private static final String INPUT_FUNCTION_ID = "plot-function-id";
+
+	public static void startActivity(@NotNull Context context, @NotNull PlotFunction plotFunction) {
+		final Intent intent = new Intent(context, CalculatorPlotFunctionSettingsActivity.class);
+		intent.putExtra(INPUT_FUNCTION_ID, plotFunction.getXyFunction().getId());
+		context.startActivity(intent);
+
+	}
+
+	@Override
+	protected void onCreate(@Nullable Bundle savedInstanceState) {
+		super.onCreate(savedInstanceState);
+
+		setContentView(R.layout.cpp_plot_function_settings_dialog);
+
+		final Intent intent = getIntent();
+
+		if (intent != null) {
+			final String plotFunctionId = intent.getStringExtra(INPUT_FUNCTION_ID);
+
+			if (plotFunctionId != null) {
+				final Bundle parameters = new Bundle();
+				parameters.putString(INPUT_FUNCTION_ID, plotFunctionId);
+				FragmentUtils.createFragment(this, CalculatorPlotFunctionSettingsFragment.class, R.id.dialog_layout, "plot-function-settings", parameters);
+			} else {
+				finish();
+			}
+		} else {
+			finish();
+		}
+	}
+
+	public static class CalculatorPlotFunctionSettingsFragment extends CalculatorFragment {
+
+		@Nullable
+		private PlotFunction plotFunction;
+
+		public CalculatorPlotFunctionSettingsFragment() {
+			super(CalculatorFragmentType.plotter_function_settings);
+		}
+
+		@Override
+		public void onCreate(Bundle savedInstanceState) {
+			super.onCreate(savedInstanceState);
+
+			final String functionId = getArguments().getString(INPUT_FUNCTION_ID);
+			if (functionId != null) {
+				plotFunction = Locator.getInstance().getPlotter().getFunctionById(functionId);
+			}
+		}
+
+		@Override
+		public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
+			return super.onCreateView(inflater, container, savedInstanceState);
+		}
+
+		@Override
+		public void onViewCreated(View root, Bundle savedInstanceState) {
+			super.onViewCreated(root, savedInstanceState);
+
+			final CalculatorPlotter plotter = Locator.getInstance().getPlotter();
+
+			final Spinner plotLineColorSpinner = (Spinner)root.findViewById(R.id.cpp_plot_function_line_color_spinner);
+			final Spinner plotLineColorTypeSpinner = (Spinner)root.findViewById(R.id.cpp_plot_function_line_color_type_spinner);
+			final Spinner plotLineStyleSpinner = (Spinner)root.findViewById(R.id.cpp_plot_function_line_style_spinner);
+			final Button okButton = (Button)root.findViewById(R.id.cpp_ok_button);
+
+			if (plotFunction != null) {
+
+				plotLineColorSpinner.setSelection(PlotLineColor.valueOf(plotFunction.getPlotLineDef().getLineColor()).ordinal());
+				plotLineColorSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
+					@Override
+					public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
+						final PlotLineColor newPlotLineColor = PlotLineColor.values()[position];
+						int newLineColor = newPlotLineColor.getColor();
+						if ( newLineColor != plotFunction.getPlotLineDef().getLineColor() ) {
+							final PlotFunction newPlotFunction = new PlotFunction(plotFunction.getXyFunction(), PlotLineDef.changeLineColor(plotFunction.getPlotLineDef(), newLineColor));
+							if(plotter.updateFunction(newPlotFunction)) {
+								plotFunction = newPlotFunction;
+							}
+						}
+					}
+
+					@Override
+					public void onNothingSelected(AdapterView<?> parent) {
+					}
+				});
+
+				plotLineColorTypeSpinner.setSelection(plotFunction.getPlotLineDef().getLineColorType().ordinal());
+				plotLineColorTypeSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
+					@Override
+					public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
+						final PlotLineColorType newPlotLineColorType = PlotLineColorType.values()[position];
+						if ( newPlotLineColorType != plotFunction.getPlotLineDef().getLineColorType() ) {
+							final PlotFunction newPlotFunction = new PlotFunction(plotFunction.getXyFunction(), PlotLineDef.changeLineColorType(plotFunction.getPlotLineDef(), newPlotLineColorType));
+							if(plotter.updateFunction(newPlotFunction)) {
+								plotFunction = newPlotFunction;
+							}
+						}
+					}
+
+					@Override
+					public void onNothingSelected(AdapterView<?> parent) {
+					}
+				});
+
+				plotLineStyleSpinner.setSelection(plotFunction.getPlotLineDef().getLineStyle().ordinal());
+				plotLineStyleSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
+					@Override
+					public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
+						final PlotLineStyle newPlotLineStyle = PlotLineStyle.values()[position];
+						if ( newPlotLineStyle != plotFunction.getPlotLineDef().getLineStyle() ) {
+							final PlotFunction newPlotFunction = new PlotFunction(plotFunction.getXyFunction(), PlotLineDef.changeLineStyle(plotFunction.getPlotLineDef(), newPlotLineStyle));
+							if(plotter.updateFunction(newPlotFunction)) {
+								plotFunction = newPlotFunction;
+							}
+						}
+					}
+
+					@Override
+					public void onNothingSelected(AdapterView<?> parent) {
+					}
+				});
+
+				okButton.setOnClickListener(new View.OnClickListener() {
+					@Override
+					public void onClick(View v) {
+						final Activity activity = getActivity();
+						if ( activity != null ) {
+							activity.finish();
+						}
+					}
+				});
+
+			} else {
+				plotLineColorSpinner.setEnabled(false);
+				plotLineColorTypeSpinner.setEnabled(false);
+				plotLineStyleSpinner.setEnabled(false);
+				okButton.setEnabled(false);
+			}
+		}
+	}
+}
diff --git a/android-app/src/main/java/org/solovyev/android/calculator/plot/CalculatorPlotFunctionsActivity.java b/android-app/src/main/java/org/solovyev/android/calculator/plot/CalculatorPlotFunctionsActivity.java
index e52b431c..47fb05a3 100644
--- a/android-app/src/main/java/org/solovyev/android/calculator/plot/CalculatorPlotFunctionsActivity.java
+++ b/android-app/src/main/java/org/solovyev/android/calculator/plot/CalculatorPlotFunctionsActivity.java
@@ -2,9 +2,18 @@ package org.solovyev.android.calculator.plot;
 
 import android.os.Bundle;
 import com.actionbarsherlock.app.SherlockFragmentActivity;
+import com.google.common.base.Function;
+import com.google.common.collect.Lists;
+import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
+import org.solovyev.android.calculator.CalculatorFragmentType;
+import org.solovyev.android.calculator.CalculatorListFragment;
+import org.solovyev.android.calculator.Locator;
 import org.solovyev.android.calculator.R;
 import org.solovyev.android.fragments.FragmentUtils;
+import org.solovyev.android.list.ListItemArrayAdapter;
+
+import java.util.List;
 
 /**
  * User: serso
@@ -21,4 +30,29 @@ public class CalculatorPlotFunctionsActivity extends SherlockFragmentActivity {
 
         FragmentUtils.createFragment(this, CalculatorPlotFunctionsFragment.class, R.id.dialog_layout, "plot-functions");
     }
+
+	public static class CalculatorPlotFunctionsFragment extends CalculatorListFragment {
+
+		@NotNull
+		public static final String INPUT = "plot_input";
+
+		public CalculatorPlotFunctionsFragment() {
+			super(CalculatorFragmentType.plotter_functions);
+		}
+
+		@Override
+		public void onResume() {
+			super.onResume();
+
+			final List<PlotFunctionListItem> items = Lists.transform(Locator.getInstance().getPlotter().getFunctions(), new Function<PlotFunction, PlotFunctionListItem>() {
+				@Override
+				public PlotFunctionListItem apply(@javax.annotation.Nullable PlotFunction input) {
+					assert input != null;
+					return new PlotFunctionListItem(input);
+				}
+			});
+
+			ListItemArrayAdapter.createAndAttach(getListView(), this.getActivity(), items);
+		}
+	}
 }
diff --git a/android-app/src/main/java/org/solovyev/android/calculator/plot/CalculatorPlotFunctionsFragment.java b/android-app/src/main/java/org/solovyev/android/calculator/plot/CalculatorPlotFunctionsFragment.java
deleted file mode 100644
index aebd3e43..00000000
--- a/android-app/src/main/java/org/solovyev/android/calculator/plot/CalculatorPlotFunctionsFragment.java
+++ /dev/null
@@ -1,37 +0,0 @@
-package org.solovyev.android.calculator.plot;
-
-import com.google.common.base.Function;
-import com.google.common.collect.Lists;
-import org.jetbrains.annotations.NotNull;
-import org.solovyev.android.calculator.CalculatorListFragment;
-import org.solovyev.android.calculator.Locator;
-import org.solovyev.android.calculator.about.CalculatorFragmentType;
-import org.solovyev.android.list.ListItemArrayAdapter;
-
-import javax.annotation.Nullable;
-import java.util.List;
-
-public class CalculatorPlotFunctionsFragment extends CalculatorListFragment {
-
-	@NotNull
-	public static final String INPUT = "plot_input";
-
-	public CalculatorPlotFunctionsFragment() {
-		super(CalculatorFragmentType.plotter_functions);
-	}
-
-	@Override
-	public void onResume() {
-		super.onResume();
-
-		final List<PlotFunctionListItem> items = Lists.transform(Locator.getInstance().getPlotter().getFunctions(), new Function<PlotFunction, PlotFunctionListItem>() {
-			@Override
-			public PlotFunctionListItem apply(@Nullable PlotFunction input) {
-                assert input != null;
-                return new PlotFunctionListItem(input);
-			}
-		});
-
-		ListItemArrayAdapter.createAndAttach(getListView(), this.getActivity(), items);
-	}
-}
diff --git a/android-app/src/main/java/org/solovyev/android/calculator/plot/Graph3d.java b/android-app/src/main/java/org/solovyev/android/calculator/plot/Graph3d.java
index 114c90f4..1de16160 100755
--- a/android-app/src/main/java/org/solovyev/android/calculator/plot/Graph3d.java
+++ b/android-app/src/main/java/org/solovyev/android/calculator/plot/Graph3d.java
@@ -94,7 +94,7 @@ class Graph3d {
 
     public void update(@NotNull GL11 gl, @NotNull ArityPlotFunction fpd, float zoom) {
         final Function function = fpd.getFunction();
-        final PlotFunctionLineDef lineDef = fpd.getLineDef();
+        final PlotLineDef lineDef = fpd.getLineDef();
         final int NTICK = useHighQuality3d ? 5 : 0;
 
         final float size = 4 * zoom;
@@ -285,7 +285,7 @@ class Graph3d {
         return maxAbsZ;
     }
 
-    private byte[] prepareFunctionPolygonColors(PlotFunctionLineDef lineDef, float[] vertices, float maxAbsZ) {
+    private byte[] prepareFunctionPolygonColors(PlotLineDef lineDef, float[] vertices, float maxAbsZ) {
         // 4 color components per polygon (color[i] = red, color[i+1] = green, color[i+2] = blue, color[i+3] = alpha )
         final byte colors[] = new byte[polygonsⁿ * COLOR_COMPONENTS_COUNT];
 
@@ -295,7 +295,7 @@ class Graph3d {
             final float z = vertices[j];
 
             if (!Float.isNaN(z)) {
-                if (lineDef.getLineColorType() == PlotFunctionLineColorType.color_map) {
+                if (lineDef.getLineColorType() == PlotLineColorType.color_map) {
                     final float color = z / maxAbsZ;
                     final float abs = Math.abs(color);
                     colors[i] = floatToByte(color);
diff --git a/android-app-core/src/main/java/org/solovyev/android/calculator/plot/PlotFunctionListItem.java b/android-app/src/main/java/org/solovyev/android/calculator/plot/PlotFunctionListItem.java
similarity index 85%
rename from android-app-core/src/main/java/org/solovyev/android/calculator/plot/PlotFunctionListItem.java
rename to android-app/src/main/java/org/solovyev/android/calculator/plot/PlotFunctionListItem.java
index 49282194..7526b60a 100644
--- a/android-app-core/src/main/java/org/solovyev/android/calculator/plot/PlotFunctionListItem.java
+++ b/android-app/src/main/java/org/solovyev/android/calculator/plot/PlotFunctionListItem.java
@@ -4,6 +4,7 @@ import android.content.Context;
 import android.view.View;
 import android.widget.CheckBox;
 import android.widget.CompoundButton;
+import android.widget.ImageButton;
 import android.widget.TextView;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
@@ -52,7 +53,7 @@ public class PlotFunctionListItem implements ListItem {
             if ( this.tag.equals(viewTag) ) {
                 return view;
             } else if (((String) viewTag).startsWith(PREFIX)) {
-                fillView(view);
+                fillView(view, context);
                 return view;
             } else {
                 return build(context);
@@ -66,7 +67,7 @@ public class PlotFunctionListItem implements ListItem {
 	@Override
 	public View build(@NotNull Context context) {
 		final View root = buildView(context);
-		fillView(root);
+		fillView(root, context);
 		return root;
 	}
 
@@ -74,7 +75,7 @@ public class PlotFunctionListItem implements ListItem {
         return viewBuilder.build(context);
     }
 
-    private void fillView(@NotNull View root) {
+    private void fillView(@NotNull View root, @NotNull final Context context) {
         root.setTag(tag);
 
         final CalculatorPlotter plotter = Locator.getInstance().getPlotter();
@@ -115,5 +116,13 @@ public class PlotFunctionListItem implements ListItem {
             }
         });
         visibleCheckBox.setChecked(plotFunction.isVisible());
+
+		final ImageButton settingsButton = (ImageButton) root.findViewById(R.id.cpp_plot_function_settings_button);
+		settingsButton.setOnClickListener(new View.OnClickListener() {
+			@Override
+			public void onClick(View v) {
+				CalculatorPlotFunctionSettingsActivity.startActivity(context, plotFunction);
+			}
+		});
     }
 }
diff --git a/android-app/src/main/java/org/solovyev/android/fragments/FragmentUtils.java b/android-app/src/main/java/org/solovyev/android/fragments/FragmentUtils.java
index e3d56482..f1e44288 100644
--- a/android-app/src/main/java/org/solovyev/android/fragments/FragmentUtils.java
+++ b/android-app/src/main/java/org/solovyev/android/fragments/FragmentUtils.java
@@ -1,14 +1,15 @@
 package org.solovyev.android.fragments;
 
+import android.os.Bundle;
 import android.support.v4.app.Fragment;
 import android.support.v4.app.FragmentActivity;
 import android.support.v4.app.FragmentManager;
 import android.support.v4.app.FragmentTransaction;
 import com.actionbarsherlock.app.SherlockFragmentActivity;
 import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
 import org.solovyev.common.collections.CollectionsUtils;
 
-import java.util.Collections;
 import java.util.List;
 
 /**
@@ -18,10 +19,18 @@ import java.util.List;
  */
 public class FragmentUtils {
 
+	public static void createFragment(@NotNull FragmentActivity activity,
+									  @NotNull Class<? extends Fragment> fragmentClass,
+									  int parentViewId,
+									  @NotNull String tag) {
+		createFragment(activity, fragmentClass, parentViewId, tag, null);
+	}
+
     public static void createFragment(@NotNull FragmentActivity activity,
-                                @NotNull Class<? extends Fragment> fragmentClass,
-                                int parentViewId,
-                                @NotNull String tag) {
+									   @NotNull Class<? extends Fragment> fragmentClass,
+									   int parentViewId,
+									   @NotNull String tag,
+									   @Nullable Bundle args) {
         final FragmentManager fm = activity.getSupportFragmentManager();
 
         Fragment messagesFragment = fm.findFragmentByTag(tag);
@@ -29,7 +38,7 @@ public class FragmentUtils {
         final FragmentTransaction ft = fm.beginTransaction();
         try {
             if (messagesFragment == null) {
-                messagesFragment = Fragment.instantiate(activity, fragmentClass.getName(), null);
+                messagesFragment = Fragment.instantiate(activity, fragmentClass.getName(), args);
                 ft.add(parentViewId, messagesFragment, tag);
             } else {
                 if (messagesFragment.isDetached()) {
diff --git a/core/src/main/java/org/solovyev/android/calculator/plot/CalculatorPlotter.java b/core/src/main/java/org/solovyev/android/calculator/plot/CalculatorPlotter.java
index 6ac7bdf1..c6c593d4 100644
--- a/core/src/main/java/org/solovyev/android/calculator/plot/CalculatorPlotter.java
+++ b/core/src/main/java/org/solovyev/android/calculator/plot/CalculatorPlotter.java
@@ -2,6 +2,7 @@ package org.solovyev.android.calculator.plot;
 
 import jscl.math.Generic;
 import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
 
 import java.util.List;
 
@@ -18,10 +19,10 @@ public interface CalculatorPlotter {
     boolean addFunction(@NotNull Generic expression);
     boolean addFunction(@NotNull PlotFunction plotFunction);
     boolean addFunction(@NotNull XyFunction xyFunction);
-    boolean addFunction(@NotNull XyFunction xyFunction, @NotNull PlotFunctionLineDef functionLineDef);
+    boolean addFunction(@NotNull XyFunction xyFunction, @NotNull PlotLineDef functionLineDef);
 
     boolean updateFunction(@NotNull PlotFunction newFunction);
-    boolean updateFunction(@NotNull XyFunction xyFunction, @NotNull PlotFunctionLineDef functionLineDef);
+    boolean updateFunction(@NotNull XyFunction xyFunction, @NotNull PlotLineDef functionLineDef);
 
     boolean removeFunction(@NotNull PlotFunction plotFunction);
     boolean removeFunction(@NotNull XyFunction xyFunction);
@@ -40,6 +41,9 @@ public interface CalculatorPlotter {
 
     void clearAllFunctions();
 
+	@Nullable
+	PlotFunction getFunctionById(@NotNull String functionId);
+
     @NotNull
     List<PlotFunction> getFunctions();
 
@@ -59,7 +63,7 @@ public interface CalculatorPlotter {
 
     void setPlotImag(boolean plotImag);
 
-    void setRealLineColor(@NotNull GraphLineColor realLineColor);
+    void setRealLineColor(@NotNull PlotLineColor realLineColor);
 
-    void setImagLineColor(@NotNull GraphLineColor imagLineColor);
+    void setImagLineColor(@NotNull PlotLineColor imagLineColor);
 }
diff --git a/core/src/main/java/org/solovyev/android/calculator/plot/CalculatorPlotterImpl.java b/core/src/main/java/org/solovyev/android/calculator/plot/CalculatorPlotterImpl.java
index 19478641..8abb77be 100644
--- a/core/src/main/java/org/solovyev/android/calculator/plot/CalculatorPlotterImpl.java
+++ b/core/src/main/java/org/solovyev/android/calculator/plot/CalculatorPlotterImpl.java
@@ -36,10 +36,10 @@ public class CalculatorPlotterImpl implements CalculatorPlotter {
     private int arity = 0;
 
     @NotNull
-    private GraphLineColor realLineColor;
+    private PlotLineColor realLineColor;
 
     @NotNull
-    private GraphLineColor imagLineColor;
+    private PlotLineColor imagLineColor;
 
     public CalculatorPlotterImpl(@NotNull Calculator calculator) {
         this.calculator = calculator;
@@ -164,12 +164,12 @@ public class CalculatorPlotterImpl implements CalculatorPlotter {
     }
 
     @Override
-    public boolean addFunction(@NotNull XyFunction xyFunction, @NotNull PlotFunctionLineDef functionLineDef) {
+    public boolean addFunction(@NotNull XyFunction xyFunction, @NotNull PlotLineDef functionLineDef) {
         return addFunction(new PlotFunction(xyFunction, functionLineDef));
     }
 
     @Override
-    public boolean updateFunction(@NotNull XyFunction xyFunction, @NotNull PlotFunctionLineDef functionLineDef) {
+    public boolean updateFunction(@NotNull XyFunction xyFunction, @NotNull PlotLineDef functionLineDef) {
         final PlotFunction newFunction = new PlotFunction(xyFunction, functionLineDef);
 
         return updateFunction(newFunction);
@@ -251,7 +251,20 @@ public class CalculatorPlotterImpl implements CalculatorPlotter {
         }
     }
 
-    // NOTE: this method must be called from synchronized block
+	@org.jetbrains.annotations.Nullable
+	@Override
+	public PlotFunction getFunctionById(@NotNull final String functionId) {
+		synchronized (functions) {
+			return Iterables.find(functions, new Predicate<PlotFunction>() {
+				@Override
+				public boolean apply(@Nullable PlotFunction function) {
+					return function != null && function.getXyFunction().getId().equals(functionId);
+				}
+			}, null);
+		}
+	}
+
+	// NOTE: this method must be called from synchronized block
     private void onFunctionsChanged() {
         assert Thread.holdsLock(functions);
 
@@ -345,12 +358,12 @@ public class CalculatorPlotterImpl implements CalculatorPlotter {
     }
 
     @Override
-    public void setRealLineColor(@NotNull GraphLineColor realLineColor) {
+    public void setRealLineColor(@NotNull PlotLineColor realLineColor) {
         this.realLineColor = realLineColor;
     }
 
     @Override
-    public void setImagLineColor(@NotNull GraphLineColor imagLineColor) {
+    public void setImagLineColor(@NotNull PlotLineColor imagLineColor) {
         this.imagLineColor = imagLineColor;
     }
 
diff --git a/core/src/main/java/org/solovyev/android/calculator/plot/PlotFunction.java b/core/src/main/java/org/solovyev/android/calculator/plot/PlotFunction.java
index 5f7d755d..25fab115 100644
--- a/core/src/main/java/org/solovyev/android/calculator/plot/PlotFunction.java
+++ b/core/src/main/java/org/solovyev/android/calculator/plot/PlotFunction.java
@@ -13,7 +13,7 @@ public class PlotFunction {
     private XyFunction xyFunction;
 
     @NotNull
-    private PlotFunctionLineDef plotFunctionLineDef;
+    private PlotLineDef mPlotLineDef;
 
     private boolean pinned = false;
 
@@ -21,20 +21,20 @@ public class PlotFunction {
 
     public PlotFunction(@NotNull XyFunction xyFunction) {
         this.xyFunction = xyFunction;
-        this.plotFunctionLineDef = PlotFunctionLineDef.newDefaultInstance();
+        this.mPlotLineDef = PlotLineDef.newDefaultInstance();
     }
 
     public PlotFunction(@NotNull XyFunction xyFunction,
-                        @NotNull PlotFunctionLineDef plotFunctionLineDef) {
+                        @NotNull PlotLineDef plotLineDef) {
         this.xyFunction = xyFunction;
-        this.plotFunctionLineDef = plotFunctionLineDef;
+        this.mPlotLineDef = plotLineDef;
     }
 
     @NotNull
     private PlotFunction copy() {
         final PlotFunction copy = new PlotFunction(this.xyFunction);
 
-        copy.plotFunctionLineDef = this.plotFunctionLineDef;
+        copy.mPlotLineDef = this.mPlotLineDef;
         copy.pinned = this.pinned;
         copy.visible = this.visible;
 
@@ -80,8 +80,8 @@ public class PlotFunction {
     }
 
     @NotNull
-    public PlotFunctionLineDef getPlotFunctionLineDef() {
-        return plotFunctionLineDef;
+    public PlotLineDef getPlotLineDef() {
+        return mPlotLineDef;
     }
 
     public boolean isPinned() {
diff --git a/core/src/main/java/org/solovyev/android/calculator/plot/PlotFunctionLineDef.java b/core/src/main/java/org/solovyev/android/calculator/plot/PlotFunctionLineDef.java
deleted file mode 100644
index 93016d86..00000000
--- a/core/src/main/java/org/solovyev/android/calculator/plot/PlotFunctionLineDef.java
+++ /dev/null
@@ -1,96 +0,0 @@
-package org.solovyev.android.calculator.plot;
-
-import org.jetbrains.annotations.NotNull;
-
-/**
- * User: serso
- * Date: 1/5/13
- * Time: 7:41 PM
- */
-public class PlotFunctionLineDef {
-
-    /*
-    **********************************************************************
-    *
-    *                           CONSTANTS
-    *
-    **********************************************************************
-    */
-
-    @NotNull
-    public static final Float DEFAULT_LINE_WIDTH = -1f;
-
-    private static final int WHITE = 0xFFFFFFFF;
-
-
-    /*
-    **********************************************************************
-    *
-    *                           FIELDS
-    *
-    **********************************************************************
-    */
-
-    @NotNull
-    private PlotFunctionLineColorType lineColorType = PlotFunctionLineColorType.solid;
-
-    private int lineColor = WHITE;
-
-    @NotNull
-    private PlotLineStyle lineStyle = PlotLineStyle.solid;
-
-    private float lineWidth = -DEFAULT_LINE_WIDTH;
-
-    private PlotFunctionLineDef() {
-    }
-
-    @NotNull
-    public static PlotFunctionLineDef newInstance(int lineColor, @NotNull PlotLineStyle lineStyle) {
-        final PlotFunctionLineDef result = new PlotFunctionLineDef();
-        result.lineColor = lineColor;
-        result.lineStyle = lineStyle;
-        return result;
-    }
-
-    @NotNull
-    public static PlotFunctionLineDef newInstance(int lineColor, @NotNull PlotLineStyle lineStyle, float lineWidth) {
-        final PlotFunctionLineDef result = new PlotFunctionLineDef();
-        result.lineColor = lineColor;
-        result.lineStyle = lineStyle;
-        result.lineWidth = lineWidth;
-        return result;
-    }
-
-    @NotNull
-    public static PlotFunctionLineDef newInstance(int lineColor, @NotNull PlotLineStyle lineStyle, float lineWidth, @NotNull PlotFunctionLineColorType lineColorType) {
-        final PlotFunctionLineDef result = new PlotFunctionLineDef();
-        result.lineColor = lineColor;
-        result.lineColorType = lineColorType;
-        result.lineStyle = lineStyle;
-        result.lineWidth = lineWidth;
-        return result;
-    }
-
-    @NotNull
-    public static PlotFunctionLineDef newDefaultInstance() {
-        return new PlotFunctionLineDef();
-    }
-
-    public int getLineColor() {
-        return lineColor;
-    }
-
-    @NotNull
-    public PlotLineStyle getLineStyle() {
-        return lineStyle;
-    }
-
-    public float getLineWidth() {
-        return lineWidth;
-    }
-
-    @NotNull
-    public PlotFunctionLineColorType getLineColorType() {
-        return lineColorType;
-    }
-}
diff --git a/core/src/main/java/org/solovyev/android/calculator/plot/GraphLineColor.java b/core/src/main/java/org/solovyev/android/calculator/plot/PlotLineColor.java
similarity index 55%
rename from core/src/main/java/org/solovyev/android/calculator/plot/GraphLineColor.java
rename to core/src/main/java/org/solovyev/android/calculator/plot/PlotLineColor.java
index 90f8fa22..8b9e614c 100644
--- a/core/src/main/java/org/solovyev/android/calculator/plot/GraphLineColor.java
+++ b/core/src/main/java/org/solovyev/android/calculator/plot/PlotLineColor.java
@@ -1,11 +1,13 @@
 package org.solovyev.android.calculator.plot;
 
+import org.jetbrains.annotations.NotNull;
+
 /**
  * User: serso
  * Date: 10/4/12
  * Time: 10:08 PM
  */
-public enum GraphLineColor {
+public enum PlotLineColor {
 
     // Color.WHITE
     white(0xFFFFFFFF),
@@ -23,7 +25,7 @@ public enum GraphLineColor {
 
     private final int color;
 
-    private GraphLineColor(int color) {
+    private PlotLineColor(int color) {
         this.color = color;
     }
 
@@ -31,4 +33,15 @@ public enum GraphLineColor {
     public int getColor() {
         return this.color;
     }
+
+	@NotNull
+	public static PlotLineColor valueOf(int color) {
+		for (PlotLineColor plotLineColor : PlotLineColor.values()) {
+			if ( plotLineColor.color == color ) {
+				return plotLineColor;
+			}
+		}
+
+		return PlotLineColor.white;
+	}
 }
diff --git a/core/src/main/java/org/solovyev/android/calculator/plot/PlotFunctionLineColorType.java b/core/src/main/java/org/solovyev/android/calculator/plot/PlotLineColorType.java
similarity index 61%
rename from core/src/main/java/org/solovyev/android/calculator/plot/PlotFunctionLineColorType.java
rename to core/src/main/java/org/solovyev/android/calculator/plot/PlotLineColorType.java
index 25be77e5..a4977179 100644
--- a/core/src/main/java/org/solovyev/android/calculator/plot/PlotFunctionLineColorType.java
+++ b/core/src/main/java/org/solovyev/android/calculator/plot/PlotLineColorType.java
@@ -5,8 +5,8 @@ package org.solovyev.android.calculator.plot;
  * Date: 1/5/13
  * Time: 10:45 PM
  */
-public enum PlotFunctionLineColorType {
+public enum PlotLineColorType {
 
-    color_map,
-    solid;
+	monochrome,
+    color_map;
 }
diff --git a/core/src/main/java/org/solovyev/android/calculator/plot/PlotLineDef.java b/core/src/main/java/org/solovyev/android/calculator/plot/PlotLineDef.java
new file mode 100644
index 00000000..3323315f
--- /dev/null
+++ b/core/src/main/java/org/solovyev/android/calculator/plot/PlotLineDef.java
@@ -0,0 +1,137 @@
+package org.solovyev.android.calculator.plot;
+
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * User: serso
+ * Date: 1/5/13
+ * Time: 7:41 PM
+ */
+public class PlotLineDef {
+
+    /*
+    **********************************************************************
+    *
+    *                           CONSTANTS
+    *
+    **********************************************************************
+    */
+
+    @NotNull
+    public static final Float DEFAULT_LINE_WIDTH = -1f;
+
+    private static final int WHITE = 0xFFFFFFFF;
+
+
+    /*
+    **********************************************************************
+    *
+    *                           FIELDS
+    *
+    **********************************************************************
+    */
+
+    @NotNull
+    private PlotLineColorType lineColorType = PlotLineColorType.monochrome;
+
+    private int lineColor = WHITE;
+
+    @NotNull
+    private PlotLineStyle lineStyle = PlotLineStyle.solid;
+
+    private float lineWidth = -DEFAULT_LINE_WIDTH;
+
+    private PlotLineDef() {
+    }
+
+    @NotNull
+    public static PlotLineDef newInstance(int lineColor, @NotNull PlotLineStyle lineStyle) {
+        final PlotLineDef result = new PlotLineDef();
+        result.lineColor = lineColor;
+        result.lineStyle = lineStyle;
+        return result;
+    }
+
+    @NotNull
+    public static PlotLineDef newInstance(int lineColor, @NotNull PlotLineStyle lineStyle, float lineWidth) {
+        final PlotLineDef result = new PlotLineDef();
+        result.lineColor = lineColor;
+        result.lineStyle = lineStyle;
+        result.lineWidth = lineWidth;
+        return result;
+    }
+
+    @NotNull
+    public static PlotLineDef newInstance(int lineColor, @NotNull PlotLineStyle lineStyle, float lineWidth, @NotNull PlotLineColorType lineColorType) {
+        final PlotLineDef result = new PlotLineDef();
+        result.lineColor = lineColor;
+        result.lineColorType = lineColorType;
+        result.lineStyle = lineStyle;
+        result.lineWidth = lineWidth;
+        return result;
+    }
+
+	@NotNull
+	private PlotLineDef copy() {
+		final PlotLineDef copy = new PlotLineDef();
+		copy.lineColor = lineColor;
+		copy.lineColorType = lineColorType;
+		copy.lineStyle = lineStyle;
+		copy.lineWidth = lineWidth;
+		return copy;
+	}
+
+	@NotNull
+	public static PlotLineDef changeLineColor(@NotNull PlotLineDef plotLineDef, int newLineColor) {
+		final PlotLineDef result = plotLineDef.copy();
+		result.lineColor = newLineColor;
+		return result;
+	}
+
+	@NotNull
+	public static PlotLineDef changeLineColorType(@NotNull PlotLineDef plotLineDef, @NotNull PlotLineColorType newPlotLineColorType) {
+		final PlotLineDef result = plotLineDef.copy();
+		result.lineColorType = newPlotLineColorType;
+		return result;
+	}
+
+	@NotNull
+	public static PlotLineDef changeLineStyle(@NotNull PlotLineDef plotLineDef, @NotNull PlotLineStyle newPlotLineStyle) {
+		final PlotLineDef result = plotLineDef.copy();
+		result.lineStyle = newPlotLineStyle;
+		return result;
+	}
+
+	@NotNull
+	public static PlotLineDef changeColor(@NotNull PlotLineDef plotLineDef, int newLineColor) {
+		final PlotLineDef result = plotLineDef.copy();
+		result.lineColor = newLineColor;
+		return result;
+	}
+
+
+
+
+	@NotNull
+    public static PlotLineDef newDefaultInstance() {
+        return new PlotLineDef();
+    }
+
+    public int getLineColor() {
+        return lineColor;
+    }
+
+    @NotNull
+    public PlotLineStyle getLineStyle() {
+        return lineStyle;
+    }
+
+    public float getLineWidth() {
+        return lineWidth;
+    }
+
+    @NotNull
+    public PlotLineColorType getLineColorType() {
+        return lineColorType;
+    }
+}
diff --git a/core/src/main/java/org/solovyev/android/calculator/plot/XyFunction.java b/core/src/main/java/org/solovyev/android/calculator/plot/XyFunction.java
index e2f2a0be..b66f99d9 100644
--- a/core/src/main/java/org/solovyev/android/calculator/plot/XyFunction.java
+++ b/core/src/main/java/org/solovyev/android/calculator/plot/XyFunction.java
@@ -4,6 +4,7 @@ import jscl.math.Generic;
 import jscl.math.function.Constant;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
+import org.solovyev.common.text.StringUtils;
 
 public class XyFunction {
 
@@ -15,22 +16,25 @@ public class XyFunction {
 	**********************************************************************
 	*/
 
+	@NotNull
+	private final String id;
+
     @NotNull
-    private final Generic expression;
+    private Generic expression;
 
     @NotNull
     private String expressionString;
 
     @Nullable
-    private final Constant xVariable;
+    private Constant xVariable;
 
     @Nullable
     private String xVariableName;
 
     @Nullable
-    private final Constant yVariable;
+    private Constant yVariable;
 
-    private final boolean imag;
+    private boolean imag;
 
     @Nullable
 	private String yVariableName;
@@ -62,6 +66,8 @@ public class XyFunction {
             this.arity--;
         }
 
+		this.id = this.expressionString + "_" + StringUtils.getNotEmpty(this.xVariableName, "") + "_" + StringUtils.getNotEmpty(this.yVariableName, "");
+
     }
 
     public boolean isImag() {
@@ -92,6 +98,11 @@ public class XyFunction {
 		return expressionString;
 	}
 
+	@NotNull
+	public String getId() {
+		return id;
+	}
+
 	@Nullable
 	public String getXVariableName() {
 		return xVariableName;
@@ -102,6 +113,7 @@ public class XyFunction {
 		return yVariableName;
 	}
 
+
 	@Override
 	public boolean equals(Object o) {
 		if (this == o) return true;
@@ -109,20 +121,13 @@ public class XyFunction {
 
 		final XyFunction that = (XyFunction) o;
 
-		if (!expressionString.equals(that.expressionString)) return false;
-		if (xVariableName != null ? !xVariableName.equals(that.xVariableName) : that.xVariableName != null)
-			return false;
-		if (yVariableName != null ? !yVariableName.equals(that.yVariableName) : that.yVariableName != null)
-			return false;
+		if (!id.equals(that.id)) return false;
 
 		return true;
 	}
 
 	@Override
 	public int hashCode() {
-		int result = expressionString.hashCode();
-		result = 31 * result + (xVariableName != null ? xVariableName.hashCode() : 0);
-		result = 31 * result + (yVariableName != null ? yVariableName.hashCode() : 0);
-		return result;
+		return id.hashCode();
 	}
 }