Changes

calculatorpp-core/src/main/java/org/solovyev/android/calculator/CalculatorEditorImpl.java

@@ -65,7 +65,7 @@ public class CalculatorEditorImpl implements CalculatorEditor {
         setViewState(newViewState, true);
     }
 
-    private void setViewState(CalculatorEditorViewState newViewState, boolean fireEvent) {
+    private void setViewState(@NotNull CalculatorEditorViewState newViewState, boolean fireEvent) {
         synchronized (viewLock) {
             final CalculatorEditorViewState oldViewState = this.lastViewState;
 
@@ -109,7 +109,7 @@ public class CalculatorEditorImpl implements CalculatorEditor {
     private CalculatorEditorViewState newSelectionViewState(int newSelection) {
         if (this.lastViewState.getSelection() != newSelection) {
             final CalculatorEditorViewState result = CalculatorEditorViewStateImpl.newSelection(this.lastViewState, newSelection);
-            setViewState(result);
+            setViewState(result, false);
             return result;
         } else {
             return this.lastViewState;
@@ -262,7 +262,7 @@ public class CalculatorEditorImpl implements CalculatorEditor {
             selection = correctSelection(selection, this.lastViewState.getText());
 
             final CalculatorEditorViewState result = CalculatorEditorViewStateImpl.newSelection(this.lastViewState, selection);
-            setViewState(result);
+            setViewState(result, false);
             return result;
         }
     }

calculatorpp-core/src/main/java/org/solovyev/android/calculator/CalculatorEventHolder.java

@@ -66,5 +66,13 @@ public class CalculatorEventHolder {
             }
             return sameSequence;
         }
+
+        public boolean isNewAfterSequence() {
+            return newEventData.isAfterSequence(lastEventData);
+        }
+
+        public boolean isNewSameOrAfterSequence() {
+            return isSameSequence() || isNewAfterSequence();
+        }
     }
 }

calculatorpp-core/src/main/java/org/solovyev/android/calculator/history/CalculatorHistory.java

@@ -30,4 +30,11 @@ public interface CalculatorHistory extends HistoryHelper<CalculatorHistoryState>
 
     @NotNull
     CalculatorHistoryState addSavedState(@NotNull CalculatorHistoryState historyState);
+
+    @NotNull
+    List<CalculatorHistoryState> getStates();
+
+    @NotNull
+    List<CalculatorHistoryState> getStates(boolean includeIntermediateStates);
+
 }

calculatorpp-core/src/main/java/org/solovyev/android/calculator/history/CalculatorHistoryImpl.java

@@ -3,18 +3,18 @@ package org.solovyev.android.calculator.history;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.solovyev.android.calculator.*;
+import org.solovyev.common.collections.CollectionsUtils;
 import org.solovyev.common.history.HistoryAction;
 import org.solovyev.common.history.HistoryHelper;
 import org.solovyev.common.history.SimpleHistoryHelper;
 
 import java.util.ArrayList;
 import java.util.Collections;
+import java.util.LinkedList;
 import java.util.List;
 import java.util.concurrent.atomic.AtomicInteger;
 
-import static org.solovyev.android.calculator.CalculatorEventType.display_state_changed;
+import static org.solovyev.android.calculator.CalculatorEventType.*;
-import static org.solovyev.android.calculator.CalculatorEventType.editor_state_changed;
-import static org.solovyev.android.calculator.CalculatorEventType.manual_calculation_requested;
 
 /**
  * User: Solovyev_S
@@ -32,10 +32,7 @@ public class CalculatorHistoryImpl implements CalculatorHistory {
     private final List<CalculatorHistoryState> savedHistory = new ArrayList<CalculatorHistoryState>();
 
     @NotNull
-    private volatile CalculatorEventData lastEventData = CalculatorUtils.createFirstEventDataId();
+    private final CalculatorEventHolder lastEventData = new CalculatorEventHolder(CalculatorUtils.createFirstEventDataId());
-
-    @NotNull
-    private final Object lastEventDataLock = new Object();
 
     @Nullable
     private volatile CalculatorEditorViewState lastEditorViewState;
@@ -114,6 +111,50 @@ public class CalculatorHistoryImpl implements CalculatorHistory {
         }
     }
 
+    @NotNull
+    @Override
+    public List<CalculatorHistoryState> getStates(boolean includeIntermediateStates) {
+        if (includeIntermediateStates) {
+            return getStates();
+        } else {
+            final List<CalculatorHistoryState> states = getStates();
+
+            final List<CalculatorHistoryState> result = new LinkedList<CalculatorHistoryState>();
+
+            CalculatorHistoryState laterState = null;
+            for (CalculatorHistoryState state : CollectionsUtils.reversed(states)) {
+                 if ( laterState != null ) {
+                     final String laterEditorText = laterState.getEditorState().getText();
+                     final String editorText = state.getEditorState().getText();
+                     if ( laterEditorText != null && editorText != null && isIntermediate(laterEditorText, editorText)) {
+                         // intermediate result => skip from add
+                     } else {
+                         result.add(0, state);
+                     }
+                 } else {
+                     result.add(0, state);
+                 }
+
+                laterState = state;
+            }
+
+            return result;
+        }
+    }
+
+    private boolean isIntermediate(@NotNull String laterEditorText,
+                                   @NotNull String editorText) {
+        if ( Math.abs(laterEditorText.length() - editorText.length()) <= 1 ) {
+            if ( laterEditorText.length() > editorText.length() ) {
+                return laterEditorText.startsWith(editorText);
+            } else {
+                return editorText.startsWith(laterEditorText);
+            }
+        }
+
+        return false;
+    }
+
     @Override
     public void clear() {
         synchronized (history) {
@@ -186,27 +227,9 @@ public class CalculatorHistoryImpl implements CalculatorHistory {
                                   @Nullable Object data) {
         if (calculatorEventType.isOfType(editor_state_changed, display_state_changed, manual_calculation_requested)) {
 
-            boolean sameSequence = false;
+            final CalculatorEventHolder.Result result = lastEventData.apply(calculatorEventData);
-            boolean afterSequence = false;
-
-            boolean processEvent = false;
-
-            synchronized (this.lastEventDataLock) {
-                if (calculatorEventData.isAfter(this.lastEventData)) {
-
-                    sameSequence = calculatorEventData.isSameSequence(this.lastEventData);
-                    if (!sameSequence) {
-                        afterSequence = calculatorEventData.isAfterSequence(this.lastEventData);
-                        processEvent = afterSequence;
-                    } else {
-                        processEvent = true;
-                    }
-                }
-            }
-
-            if (processEvent) {
-                    this.lastEventData = calculatorEventData;
 
+            if (result.isNewAfter() && result.isNewSameOrAfterSequence() ) {
                     switch (calculatorEventType) {
                         case manual_calculation_requested:
                             lastEditorViewState = (CalculatorEditorViewState) data;
@@ -216,7 +239,7 @@ public class CalculatorHistoryImpl implements CalculatorHistory {
                             lastEditorViewState = editorChangeData.getNewValue();
                             break;
                         case display_state_changed:
-                            if (sameSequence) {
+                            if (result.isSameSequence()) {
                                 if (lastEditorViewState != null) {
                                     final CalculatorEditorViewState editorViewState = lastEditorViewState;
                                     final CalculatorDisplayChangeEventData displayChangeData = (CalculatorDisplayChangeEventData) data;

calculatorpp-core/src/test/java/org/solovyev/android/calculator/history/CalculatorHistoryImplTest.java

@@ -0,0 +1,53 @@
+package org.solovyev.android.calculator.history;
+
+import junit.framework.Assert;
+import org.jetbrains.annotations.NotNull;
+import org.junit.BeforeClass;
+import org.junit.Test;
+import org.solovyev.android.calculator.CalculatorDisplayViewStateImpl;
+import org.solovyev.android.calculator.CalculatorEditorViewStateImpl;
+import org.solovyev.android.calculator.CalculatorLocatorImpl;
+import org.solovyev.android.calculator.CalculatorTestUtils;
+
+import java.util.List;
+
+/**
+ * User: Solovyev_S
+ * Date: 10.10.12
+ * Time: 15:07
+ */
+public class CalculatorHistoryImplTest {
+
+    @BeforeClass
+    public static void setUp() throws Exception {
+        CalculatorTestUtils.staticSetUp();
+    }
+
+    @Test
+    public void testGetStates() throws Exception {
+        CalculatorHistory calculatorHistory = new CalculatorHistoryImpl(CalculatorLocatorImpl.getInstance().getCalculator());
+
+        addState(calculatorHistory, "1");
+        addState(calculatorHistory, "12");
+        addState(calculatorHistory, "123");
+        addState(calculatorHistory, "123+");
+        addState(calculatorHistory, "123+3");
+        addState(calculatorHistory, "");
+        addState(calculatorHistory, "2");
+        addState(calculatorHistory, "23");
+        addState(calculatorHistory, "235");
+        addState(calculatorHistory, "2355");
+        addState(calculatorHistory, "235");
+        addState(calculatorHistory, "2354");
+        addState(calculatorHistory, "23547");
+
+        final List<CalculatorHistoryState> states = calculatorHistory.getStates(false);
+        Assert.assertEquals(2, states.size());
+        Assert.assertEquals("23547", states.get(1).getEditorState().getText());
+        Assert.assertEquals("123+3", states.get(0).getEditorState().getText());
+    }
+
+    private void addState(@NotNull CalculatorHistory calculatorHistory, @NotNull String text) {
+        calculatorHistory.addState(CalculatorHistoryState.newInstance(CalculatorEditorViewStateImpl.newInstance(text, 3), CalculatorDisplayViewStateImpl.newDefaultInstance()));
+    }
+}

calculatorpp/res/values-ru/text_preferences.xml

@@ -7,4 +7,7 @@
 
     <string name="c_hide_numeral_base_digits_title">Не показывать цифры из других систем счисления</string>
     <string name="c_hide_numeral_base_digits_summary">Если включено, то цифры из других систем счисления не будут показаны</string>
+
+    <string name="prefs_history_show_intermediate_calculations_title">Показывать промежуточные вычисления на экране истории</string>
+    <string name="prefs_history_show_intermediate_calculations_summary">Если включено, то все вычисления будут показаны на экране истории</string>
 </resources>

calculatorpp/res/values/text_preferences.xml

@@ -7,4 +7,7 @@
 
     <string name="c_hide_numeral_base_digits_title">Hide numeral base digits</string>
     <string name="c_hide_numeral_base_digits_summary">If turned on numeral base digits of other numeral bases will be hidden</string>
+
+    <string name="prefs_history_show_intermediate_calculations_title">Show intermediate calculations in history</string>
+    <string name="prefs_history_show_intermediate_calculations_summary">If turned on all calculations will be shown on history screen</string>
 </resources>

calculatorpp/res/xml/appearance_preferences.xml

@@ -0,0 +1,99 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<PreferenceScreen xmlns:a="http://schemas.android.com/apk/res/android"
+                  xmlns:range="http://schemas.android.com/apk/res-auto">
+
+    <PreferenceScreen
+            a:title="@string/c_prefs_appearance_category">
+
+        <org.solovyev.android.ads.AdViewPreference a:layout="@layout/admob_pref"/>
+
+        <android.preference.CheckBoxPreference
+                a:key="@string/p_calc_color_display_key"
+                a:summary="@string/c_calc_color_display_summary"
+                a:title="@string/c_calc_color_display_title"
+                a:defaultValue="true"/>
+
+        <android.preference.CheckBoxPreference
+                a:key="@string/p_calc_haptic_feedback_key"
+                a:summary="@string/c_calc_haptic_feedback_summary"
+                a:title="@string/c_calc_haptic_feedback_title"
+                a:defaultValue="false"/>
+
+        <ListPreference a:key="@string/p_calc_haptic_feedback_duration_key"
+                        a:title="@string/p_calc_haptic_feedback_duration_title"
+                        a:entries="@array/p_calc_haptic_feedback_duration_names"
+                        a:summary="@string/p_calc_haptic_feedback_duration_summary"
+                        a:entryValues="@array/p_calc_haptic_feedback_duration_values"/>
+
+        <ListPreference a:key="@string/p_calc_multiplication_sign_key"
+                        a:title="@string/c_calc_multiplication_sign"
+                        a:entries="@array/p_multiplication_sign_values"
+                        a:summary="@string/c_calc_multiplication_sign_summary"
+                        a:entryValues="@array/p_multiplication_sign_values"/>
+
+        <ListPreference a:key="@string/p_calc_theme_key"
+                        a:title="@string/c_calc_theme"
+                        a:entries="@array/p_theme_names"
+                        a:summary="@string/c_calc_theme_summary"
+                        a:entryValues="@array/p_theme_values"/>
+
+        <ListPreference a:key="@string/p_calc_layout_key"
+                        a:title="@string/c_calc_layout"
+                        a:entries="@array/p_layout_names"
+                        a:summary="@string/c_calc_layout_summary"
+                        a:entryValues="@array/p_layout_values"/>
+
+
+        <org.solovyev.android.prefs.FloatRangeSeekBarPreference
+                a:key="@string/p_drag_distance_key"
+                a:title="@string/c_swipe_distance"
+                a:summary="@string/c_swipe_distance_summary"
+                a:text=" pxs"
+                a:defaultValue="35;350"
+                range:step="10"
+                range:boundaries="10;500"/>
+
+        <!--	  <org.solovyev.android.prefs.FloatRangeSeekBarPreference
+                                        a:key="@string/p_drag_duration_key"
+                                        a:title="Duration of drag event"
+                                        a:text=" ms"
+                                        a:defaultValue="40;2500"
+                                        range:steps="10"
+                                        range:boundaries="5;4000"/>
+
+                                <org.solovyev.android.prefs.FloatRangeSeekBarPreference
+                                        a:key="@string/p_drag_angle_key"
+                                        a:title="Angle of drag event"
+                                        a:text=" degrees"
+                                        a:defaultValue="0;45"
+                                        range:steps="5"
+                                        range:boundaries="0;45"/>-->
+
+        <android.preference.CheckBoxPreference
+                a:key="autoOrientation"
+                a:title="@string/c_auto_orientation_title"
+                a:summary="@string/c_auto_orientation_summary"
+                a:defaultValue="true"/>
+
+
+        <android.preference.CheckBoxPreference
+                a:key="showEqualsButton"
+                a:title="@string/c_show_equals_button_title"
+                a:summary="@string/c_show_equals_button_summary"
+                a:defaultValue="true"/>
+
+        <android.preference.CheckBoxPreference
+                a:key="hideNumeralBaseDigits"
+                a:title="@string/c_hide_numeral_base_digits_title"
+                a:summary="@string/c_hide_numeral_base_digits_summary"
+                a:defaultValue="true"/>
+
+        <android.preference.CheckBoxPreference
+                a:key="history_show_intermediate_calculations"
+                a:title="@string/prefs_history_show_intermediate_calculations_title"
+                a:summary="@string/prefs_history_show_intermediate_calculations_summary"/>
+
+    </PreferenceScreen>
+
+</PreferenceScreen>

calculatorpp/res/xml/calculations_preferences.xml

@@ -0,0 +1,56 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<PreferenceScreen xmlns:a="http://schemas.android.com/apk/res/android"
+                  xmlns:range="http://schemas.android.com/apk/res-auto">
+
+    <PreferenceScreen a:title="@string/c_prefs_calculations_category">
+
+        <org.solovyev.android.ads.AdViewPreference a:layout="@layout/admob_pref"/>
+
+        <android.preference.CheckBoxPreference
+                a:key="@string/p_calc_round_result_key"
+                a:summary="@string/c_calc_round_result_summary"
+                a:title="@string/c_calc_round_result_title"
+                a:defaultValue="true"/>
+
+        <org.solovyev.android.prefs.IntegerPickerDialogPreference
+                a:key="@string/p_calc_result_precision_key"
+                a:title="@string/p_calc_result_precision_title"
+                a:summary="@string/c_calc_result_precision_summary"
+                a:defaultValue="5"
+                range:boundaries="0;16"/>
+
+        <android.preference.CheckBoxPreference
+                a:key="@string/p_calc_science_notation_key"
+                a:summary="@string/c_calc_science_notation_summary"
+                a:title="@string/c_calc_science_notation_title"
+                a:defaultValue="false"/>
+
+        <ListPreference a:key="@string/p_calc_grouping_separator_key"
+                        a:title="@string/c_calc_grouping_separator"
+                        a:entries="@array/p_grouping_separator_names"
+                        a:summary="@string/c_calc_grouping_separator_summary"
+                        a:entryValues="@array/p_grouping_separator_values"/>
+
+        <ListPreference a:key="@string/p_calc_angle_units_key"
+                        a:title="@string/c_calc_angle_units"
+                        a:entries="@array/p_angle_units_names"
+                        a:summary="@string/c_angle_units_summary"
+                        a:entryValues="@array/p_angle_units"/>
+
+        <ListPreference a:key="@string/p_calc_numeral_bases_key"
+                        a:title="@string/c_calc_numeral_bases"
+                        a:entries="@array/p_numeral_bases_names"
+                        a:summary="@string/c_numeral_bases_summary"
+                        a:entryValues="@array/p_numeral_bases"/>
+
+        <org.solovyev.android.prefs.IntegerPickerDialogPreference
+                a:key="@string/p_calc_max_calculation_time_key"
+                a:title="@string/p_calc_max_calculation_time_title"
+                a:summary="@string/p_calc_max_calculation_time_summary"
+                a:defaultValue="5"
+                range:boundaries="3;1000"/>
+
+    </PreferenceScreen>
+
+</PreferenceScreen>

calculatorpp/res/xml/other_preferences.xml

@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<PreferenceScreen xmlns:a="http://schemas.android.com/apk/res/android">
+
+    <PreferenceScreen
+            a:title="@string/c_prefs_other_category">
+
+        <org.solovyev.android.ads.AdViewPreference a:layout="@layout/admob_pref"/>
+
+        <android.preference.CheckBoxPreference
+                a:key="@string/p_calc_show_release_notes_key"
+                a:summary="@string/c_calc_show_release_notes_summary"
+                a:title="@string/c_calc_show_release_notes_title"
+                a:defaultValue="true"/>
+
+        <android.preference.CheckBoxPreference
+                a:key="@string/p_calc_use_back_button_as_prev_key"
+                a:summary="@string/c_calc_use_back_button_as_prev_summary"
+                a:title="@string/c_calc_use_back_button_as_prev_title"
+                a:defaultValue="false"/>
+
+        <Preference
+                a:key="@string/p_clear_billing_info_key"
+                a:summary="@string/c_clear_billing_info_summary"
+                a:title="@string/c_clear_billing_info_title"/>
+
+    </PreferenceScreen>
+
+</PreferenceScreen>

calculatorpp/res/xml/preferences.xml

@@ -1,7 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 
-<PreferenceScreen xmlns:a="http://schemas.android.com/apk/res/android"
+<PreferenceScreen xmlns:a="http://schemas.android.com/apk/res/android">
-                  xmlns:range="http://schemas.android.com/apk/res-auto">
 
     <Preference
             a:key="@string/p_calc_ad_free_key"
@@ -12,167 +11,4 @@
 
     <org.solovyev.android.ads.AdViewPreference a:layout="@layout/admob_pref"/>
 
-    <PreferenceScreen a:title="@string/c_prefs_calculations_category">
-
-        <org.solovyev.android.ads.AdViewPreference a:layout="@layout/admob_pref"/>
-
-        <android.preference.CheckBoxPreference
-                a:key="@string/p_calc_round_result_key"
-                a:summary="@string/c_calc_round_result_summary"
-                a:title="@string/c_calc_round_result_title"
-                a:defaultValue="true"/>
-
-        <org.solovyev.android.prefs.IntegerPickerDialogPreference
-                a:key="@string/p_calc_result_precision_key"
-                a:title="@string/p_calc_result_precision_title"
-                a:summary="@string/c_calc_result_precision_summary"
-                a:defaultValue="5"
-                range:boundaries="0;16"/>
-
-        <android.preference.CheckBoxPreference
-                a:key="@string/p_calc_science_notation_key"
-                a:summary="@string/c_calc_science_notation_summary"
-                a:title="@string/c_calc_science_notation_title"
-                a:defaultValue="false"/>
-
-        <ListPreference a:key="@string/p_calc_grouping_separator_key"
-                        a:title="@string/c_calc_grouping_separator"
-                        a:entries="@array/p_grouping_separator_names"
-                        a:summary="@string/c_calc_grouping_separator_summary"
-                        a:entryValues="@array/p_grouping_separator_values"/>
-
-        <ListPreference a:key="@string/p_calc_angle_units_key"
-                        a:title="@string/c_calc_angle_units"
-                        a:entries="@array/p_angle_units_names"
-                        a:summary="@string/c_angle_units_summary"
-                        a:entryValues="@array/p_angle_units"/>
-
-        <ListPreference a:key="@string/p_calc_numeral_bases_key"
-                        a:title="@string/c_calc_numeral_bases"
-                        a:entries="@array/p_numeral_bases_names"
-                        a:summary="@string/c_numeral_bases_summary"
-                        a:entryValues="@array/p_numeral_bases"/>
-
-        <org.solovyev.android.prefs.IntegerPickerDialogPreference
-                a:key="@string/p_calc_max_calculation_time_key"
-                a:title="@string/p_calc_max_calculation_time_title"
-                a:summary="@string/p_calc_max_calculation_time_summary"
-                a:defaultValue="5"
-                range:boundaries="3;1000"/>
-
-    </PreferenceScreen>
-
-    <PreferenceScreen
-            a:title="@string/c_prefs_appearance_category">
-
-        <org.solovyev.android.ads.AdViewPreference a:layout="@layout/admob_pref"/>
-
-        <android.preference.CheckBoxPreference
-                a:key="@string/p_calc_color_display_key"
-                a:summary="@string/c_calc_color_display_summary"
-                a:title="@string/c_calc_color_display_title"
-                a:defaultValue="true"/>
-
-        <android.preference.CheckBoxPreference
-                a:key="@string/p_calc_haptic_feedback_key"
-                a:summary="@string/c_calc_haptic_feedback_summary"
-                a:title="@string/c_calc_haptic_feedback_title"
-                a:defaultValue="false"/>
-
-        <ListPreference a:key="@string/p_calc_haptic_feedback_duration_key"
-                        a:title="@string/p_calc_haptic_feedback_duration_title"
-                        a:entries="@array/p_calc_haptic_feedback_duration_names"
-                        a:summary="@string/p_calc_haptic_feedback_duration_summary"
-                        a:entryValues="@array/p_calc_haptic_feedback_duration_values"/>
-
-        <ListPreference a:key="@string/p_calc_multiplication_sign_key"
-                        a:title="@string/c_calc_multiplication_sign"
-                        a:entries="@array/p_multiplication_sign_values"
-                        a:summary="@string/c_calc_multiplication_sign_summary"
-                        a:entryValues="@array/p_multiplication_sign_values"/>
-
-        <ListPreference a:key="@string/p_calc_theme_key"
-                        a:title="@string/c_calc_theme"
-                        a:entries="@array/p_theme_names"
-                        a:summary="@string/c_calc_theme_summary"
-                        a:entryValues="@array/p_theme_values"/>
-
-        <ListPreference a:key="@string/p_calc_layout_key"
-                        a:title="@string/c_calc_layout"
-                        a:entries="@array/p_layout_names"
-                        a:summary="@string/c_calc_layout_summary"
-                        a:entryValues="@array/p_layout_values"/>
-
-
-        <org.solovyev.android.prefs.FloatRangeSeekBarPreference
-                a:key="@string/p_drag_distance_key"
-                a:title="@string/c_swipe_distance"
-                a:summary="@string/c_swipe_distance_summary"
-                a:text=" pxs"
-                a:defaultValue="35;350"
-                range:step="10"
-                range:boundaries="10;500"/>
-
-        <!--	  <org.solovyev.android.prefs.FloatRangeSeekBarPreference
-                                        a:key="@string/p_drag_duration_key"
-                                        a:title="Duration of drag event"
-                                        a:text=" ms"
-                                        a:defaultValue="40;2500"
-                                        range:steps="10"
-                                        range:boundaries="5;4000"/>
-
-                                <org.solovyev.android.prefs.FloatRangeSeekBarPreference
-                                        a:key="@string/p_drag_angle_key"
-                                        a:title="Angle of drag event"
-                                        a:text=" degrees"
-                                        a:defaultValue="0;45"
-                                        range:steps="5"
-                                        range:boundaries="0;45"/>-->
-
-        <android.preference.CheckBoxPreference
-                a:key="autoOrientation"
-                a:title="@string/c_auto_orientation_title"
-                a:summary="@string/c_auto_orientation_summary"
-                a:defaultValue="true"/>
-
-
-        <android.preference.CheckBoxPreference
-                a:key="showEqualsButton"
-                a:title="@string/c_show_equals_button_title"
-                a:summary="@string/c_show_equals_button_summary"
-                a:defaultValue="true"/>
-
-        <android.preference.CheckBoxPreference
-                a:key="hideNumeralBaseDigits"
-                a:title="@string/c_hide_numeral_base_digits_title"
-                a:summary="@string/c_hide_numeral_base_digits_summary"
-                a:defaultValue="true"/>
-
-
-    </PreferenceScreen>
-
-    <PreferenceScreen
-            a:title="@string/c_prefs_other_category">
-
-        <org.solovyev.android.ads.AdViewPreference a:layout="@layout/admob_pref"/>
-
-        <android.preference.CheckBoxPreference
-                a:key="@string/p_calc_show_release_notes_key"
-                a:summary="@string/c_calc_show_release_notes_summary"
-                a:title="@string/c_calc_show_release_notes_title"
-                a:defaultValue="true"/>
-
-        <android.preference.CheckBoxPreference
-                a:key="@string/p_calc_use_back_button_as_prev_key"
-                a:summary="@string/c_calc_use_back_button_as_prev_summary"
-                a:title="@string/c_calc_use_back_button_as_prev_title"
-                a:defaultValue="false"/>
-
-        <Preference
-                a:key="@string/p_clear_billing_info_key"
-                a:summary="@string/c_clear_billing_info_summary"
-                a:title="@string/c_clear_billing_info_title"/>
-
-    </PreferenceScreen>
-
 </PreferenceScreen>

calculatorpp/src/main/java/org/solovyev/android/calculator/CalculatorPreferences.java

@@ -114,8 +114,13 @@ public final class CalculatorPreferences {
         public static final Preference<GraphLineColor> lineColorImag = StringPreference.newInstance("graph_line_color_imag", GraphLineColor.blue, GraphLineColor.class);
     }
 
+    public static class History {
+        public static final Preference<Boolean> showIntermediateCalculations = new BooleanPreference("history_show_intermediate_calculations", false);
+    }
 
-    static void setDefaultValues(@NotNull SharedPreferences preferences) {
+
+
+        static void setDefaultValues(@NotNull SharedPreferences preferences) {
         if (!AndroidCalculatorEngine.Preferences.groupingSeparator.isSet(preferences)) {
             final Locale locale = Locale.getDefault();
             if (locale != null) {
@@ -163,6 +168,7 @@ public final class CalculatorPreferences {
         applyDefaultPreference(preferences, Graph.interpolate);
         applyDefaultPreference(preferences, Graph.lineColorImag);
         applyDefaultPreference(preferences, Graph.lineColorReal);
+        applyDefaultPreference(preferences, History.showIntermediateCalculations);
 
         if ( !VibratorContainer.Preferences.hapticFeedbackEnabled.isSet(preferences) ) {
             VibratorContainer.Preferences.hapticFeedbackEnabled.putPreference(preferences, true);

calculatorpp/src/main/java/org/solovyev/android/calculator/CalculatorPreferencesActivity.java

@@ -42,7 +42,10 @@ public class CalculatorPreferencesActivity extends SherlockPreferenceActivity im
         //noinspection deprecation
         addPreferencesFromResource(R.xml.preferences);
         //noinspection deprecation
+        addPreferencesFromResource(R.xml.calculations_preferences);
+        addPreferencesFromResource(R.xml.appearance_preferences);
         addPreferencesFromResource(R.xml.plot_preferences);
+        addPreferencesFromResource(R.xml.other_preferences);
 
 		final Preference adFreePreference = findPreference(CalculatorApplication.AD_FREE_P_KEY);
 		adFreePreference.setEnabled(false);

calculatorpp/src/main/java/org/solovyev/android/calculator/history/AndroidCalculatorHistory.java

@@ -12,7 +12,10 @@ import android.content.SharedPreferences;
 import android.preference.PreferenceManager;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
-import org.solovyev.android.calculator.*;
+import org.solovyev.android.calculator.Calculator;
+import org.solovyev.android.calculator.CalculatorEventData;
+import org.solovyev.android.calculator.CalculatorEventType;
+import org.solovyev.android.calculator.R;
 import org.solovyev.common.history.HistoryAction;
 
 import java.util.List;
@@ -117,6 +120,12 @@ public class AndroidCalculatorHistory implements CalculatorHistory {
         return calculatorHistory.getStates();
     }
 
+    @NotNull
+    @Override
+    public List<CalculatorHistoryState> getStates(boolean includeIntermediateStates) {
+        return calculatorHistory.getStates(includeIntermediateStates);
+    }
+
     @Override
     public void clear() {
         calculatorHistory.clear();

calculatorpp/src/main/java/org/solovyev/android/calculator/history/CalculatorHistoryFragment.java

@@ -6,8 +6,10 @@
 
 package org.solovyev.android.calculator.history;
 
+import android.preference.PreferenceManager;
 import org.jetbrains.annotations.NotNull;
 import org.solovyev.android.calculator.CalculatorLocatorImpl;
+import org.solovyev.android.calculator.CalculatorPreferences;
 import org.solovyev.android.calculator.R;
 import org.solovyev.android.calculator.about.CalculatorFragmentType;
 
@@ -33,7 +35,8 @@ public class CalculatorHistoryFragment extends AbstractCalculatorHistoryFragment
 	@NotNull
 	@Override
 	protected List<CalculatorHistoryState> getHistoryItems() {
-		return new ArrayList<CalculatorHistoryState>(CalculatorLocatorImpl.getInstance().getHistory().getStates());
+        final boolean showIntermediateCalculations = CalculatorPreferences.History.showIntermediateCalculations.getPreference(PreferenceManager.getDefaultSharedPreferences(getActivity()));
+		return new ArrayList<CalculatorHistoryState>(CalculatorLocatorImpl.getInstance().getHistory().getStates(showIntermediateCalculations));
 	}
 
 	@Override