Extract DragButton into a separate module

app/build.gradle

@@ -26,11 +26,12 @@ apply plugin: 'signing'
 apply plugin: 'com.neenbedankt.android-apt'
 
 android {
-    compileSdkVersion 23
-    buildToolsVersion '23.0.3'
+    compileSdkVersion versions.sdk.compile
+    buildToolsVersion versions.sdk.buildTools
     defaultConfig {
-        minSdkVersion 9
-        targetSdkVersion 23
+        applicationId "org.solovyev.android.calculator"
+        minSdkVersion versions.sdk.min
+        targetSdkVersion versions.sdk.target
         versionCode 153
         versionName '2.2.3'
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
@@ -61,9 +62,9 @@ android {
 
 dependencies {
     compile fileTree(include: ['*.jar'], dir: 'libs')
-    compile 'com.android.support:support-v4:23.4.0'
-    compile 'com.android.support:appcompat-v7:23.4.0'
-    compile 'com.android.support:design:23.4.0'
+    compile "com.android.support:support-v4:${versions.supportLib}"
+    compile "com.android.support:appcompat-v7:${versions.supportLib}"
+    compile "com.android.support:design:${versions.supportLib}"
     compile('ch.acra:acra:4.7.0') {
         exclude group: 'org.json'
     }
@@ -71,6 +72,7 @@ dependencies {
     compile ':square-otto:1.3.9-SNAPSHOT'
     apt ':square-otto-compiler:1.3.9-SNAPSHOT'
     apt 'com.squareup:javapoet:1.5.1'
+    compile project(':dragbutton')
     compile(project(':jscl')) {
         exclude(module: 'xercesImpl')
     }

app/src/main/res/values/colors.xml

@@ -65,4 +65,6 @@
     <color name="pink_900">#880e4f</color>
     <color name="yellow_100">#ffff8d</color>
 
+    <color name="drag_text_inverse">@color/cpp_text_inverse</color>
+    <color name="drag_button_text">@color/cpp_button_text</color>
 </resources>

app/src/main/res/values/dimens.xml

@@ -7,9 +7,6 @@
     <dimen name="cpp_widget_margin">6dp</dimen>
     <dimen name="min_expanded_height_lock_screen">300dp</dimen>
     <dimen name="cpp_button_padding">1px</dimen>
-    <dimen name="cpp_direction_text_default_padding">2dp</dimen>
-    <dimen name="cpp_direction_text_min_size">9dp</dimen>
-    <item name="cpp_direction_text_scale" format="float" type="dimen">0.35</item>
     <dimen name="cpp_button_corner">1dp</dimen>
 
     <dimen name="cpp_keyboard_button_direction_text_padding_updown">4dp</dimen>

app/src/main/res/values/drag_dimens.xml

@@ -1,4 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<resources>
-    <dimen name="drag_min_distance">15dp</dimen>
-</resources>

app/src/main/res/values/styles.xml

@@ -35,7 +35,7 @@
         <item name="android:textColor">@color/cpp_button_text</item>
         <item name="android:scaleType">centerInside</item>
         <item name="directionTextColor">@color/cpp_button_text</item>
-        <item name="directionTextScale">@dimen/cpp_direction_text_scale</item>
+        <item name="directionTextScale">@dimen/drag_direction_text_scale</item>
         <item name="directionTextPaddingUp">@dimen/cpp_keyboard_button_direction_text_padding_updown</item>
         <item name="directionTextPaddingDown">@dimen/cpp_keyboard_button_direction_text_padding_updown</item>
         <item name="directionTextPaddingRight">@dimen/cpp_keyboard_button_direction_text_padding_updown</item>

build.gradle

@@ -6,6 +6,11 @@ buildscript {
         classpath 'com.android.tools.build:gradle:2.1.2'
         classpath 'com.neenbedankt.gradle.plugins:android-apt:1.4'
     }
+
+    ext {
+        versions = [supportLib: "23.4.0",
+                    sdk       : [compile: 23, buildTools: "23.0.3", min: 9, target: 23]]
+    }
 }
 
 allprojects {

dragbutton/.gitignore

@@ -0,0 +1 @@
+/build

dragbutton/build.gradle

@@ -0,0 +1,24 @@
+apply plugin: 'com.android.library'
+
+android {
+    compileSdkVersion versions.sdk.compile
+    buildToolsVersion versions.sdk.buildTools
+    defaultConfig {
+        minSdkVersion versions.sdk.min
+        targetSdkVersion versions.sdk.target
+        versionCode 1
+        versionName "1.0"
+    }
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+        }
+    }
+}
+
+dependencies {
+    compile fileTree(dir: 'libs', include: ['*.jar'])
+    compile "com.android.support:appcompat-v7:${versions.supportLib}"
+    compile "com.android.support:support-annotations:${versions.supportLib}"
+}

dragbutton/proguard-rules.pro

@@ -0,0 +1,17 @@
+# Add project specific ProGuard rules here.
+# By default, the flags in this file are appended to flags specified
+# in /opt/android/sdk/tools/proguard/proguard-android.txt
+# You can edit the include path and order by changing the proguardFiles
+# directive in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# Add any project specific keep options here:
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}

dragbutton/src/main/AndroidManifest.xml

@@ -0,0 +1,5 @@
+<manifest package="org.solovyev.android.views.dragbutton">
+
+    <application />
+
+</manifest>

dragbutton/src/main/java/org/solovyev/android/views/dragbutton/DirectionDragButton.java

@@ -8,8 +8,6 @@ import android.support.annotation.Nullable;
 import android.text.TextPaint;
 import android.util.AttributeSet;
 
-import javax.annotation.Nonnull;
-
 import static android.graphics.Color.BLACK;
 import static android.util.TypedValue.COMPLEX_UNIT_DIP;
 import static android.util.TypedValue.applyDimension;
@@ -72,7 +70,7 @@ public class DirectionDragButton extends DragButton implements DirectionDragView
     }
 
     @Override
-    @Nonnull
+    @NonNull
     public DirectionTextView.Text getText(@NonNull DragDirection direction) {
         return textView.getText(direction);
     }

dragbutton/src/main/java/org/solovyev/android/views/dragbutton/DirectionDragImageButton.java

@@ -9,8 +9,6 @@ import android.text.TextPaint;
 import android.util.AttributeSet;
 import android.widget.TextView;
 
-import javax.annotation.Nonnull;
-
 public class DirectionDragImageButton extends DragImageButton implements DirectionDragView {
     private final DirectionTextView textView = new DirectionTextView();
     private final TextPaint baseTextPaint = new TextPaint();
@@ -47,12 +45,12 @@ public class DirectionDragImageButton extends DragImageButton implements Directi
         textView.draw(canvas);
     }
 
-    @Nonnull
+    @NonNull
     public DirectionTextView.Text getText(@NonNull DragDirection direction) {
         return textView.getText(direction);
     }
 
-    public void setTypeface(@Nonnull Typeface newTypeface) {
+    public void setTypeface(@NonNull Typeface newTypeface) {
         final Typeface oldTypeface = baseTextPaint.getTypeface();
         if (oldTypeface == newTypeface) {
             return;

dragbutton/src/main/java/org/solovyev/android/views/dragbutton/DirectionDragListener.java

@@ -7,12 +7,8 @@ import android.support.annotation.Nullable;
 import android.util.Log;
 import android.view.View;
 
-import org.solovyev.android.calculator.R;
-
 import static java.lang.Math.toDegrees;
-import static org.solovyev.android.views.dragbutton.Drag.distance;
-import static org.solovyev.android.views.dragbutton.Drag.getAngle;
-import static org.solovyev.android.views.dragbutton.Drag.sum;
+import static org.solovyev.android.views.dragbutton.Drag.*;
 
 
 public abstract class DirectionDragListener implements DragListener {

dragbutton/src/main/java/org/solovyev/android/views/dragbutton/DirectionDragView.java

@@ -2,9 +2,7 @@ package org.solovyev.android.views.dragbutton;
 
 import android.support.annotation.NonNull;
 
-import javax.annotation.Nonnull;
-
 public interface DirectionDragView extends DragView {
-    @Nonnull
+    @NonNull
     DirectionTextView.Text getText(@NonNull DragDirection direction);
 }

dragbutton/src/main/java/org/solovyev/android/views/dragbutton/DirectionTextView.java

@@ -16,9 +16,6 @@ import android.text.TextUtils;
 import android.util.AttributeSet;
 import android.view.View;
 import android.widget.TextView;
-import com.google.common.base.Strings;
-import org.solovyev.android.Check;
-import org.solovyev.android.calculator.R;
 
 import java.util.EnumMap;
 import java.util.Map;
@@ -50,11 +47,10 @@ public class DirectionTextView {
     }
 
     public void init(@NonNull View view, @Nullable AttributeSet attrs, @NonNull TextPaint baseTextPaint) {
-        Check.isTrue(texts.isEmpty());
         final Context context = view.getContext();
         final int defColor = baseTextPaint.getColor();
-        final int defPadding = context.getResources().getDimensionPixelSize(R.dimen.cpp_direction_text_default_padding);
-        final float minTextSize = context.getResources().getDimensionPixelSize(R.dimen.cpp_direction_text_min_size);
+        final int defPadding = context.getResources().getDimensionPixelSize(R.dimen.drag_direction_text_default_padding);
+        final float minTextSize = context.getResources().getDimensionPixelSize(R.dimen.drag_direction_text_min_size);
 
 
         if (attrs == null) {
@@ -126,7 +122,7 @@ public class DirectionTextView {
         public void init(@NonNull TextPaint base, @Nullable TypedArray array, float defScale, int defColor, float defAlpha, int defPadding) {
             if (array != null) {
                 if (array.hasValue(direction.textAttr)) {
-                    value = Strings.nullToEmpty(array.getString(direction.textAttr));
+                    value = nullToEmpty(array.getString(direction.textAttr));
                 }
                 padding = array.getDimensionPixelSize(direction.paddingAttr, defPadding);
                 scale = array.getFloat(direction.scaleAttr, defScale);
@@ -141,8 +137,13 @@ public class DirectionTextView {
             initPaint(base);
         }
 
+        @NonNull
+        private String nullToEmpty(@Nullable String s) {
+            return s == null ? "" : s;
+        }
+
         private int makeContrastColor(int color) {
-            final int colorRes = isLightColor(color) ? R.color.cpp_button_text : R.color.cpp_text_inverse;
+            final int colorRes = isLightColor(color) ? R.color.drag_button_text : R.color.drag_text_inverse;
             return ContextCompat.getColor(view.getContext(), colorRes);
         }
 
@@ -218,7 +219,6 @@ public class DirectionTextView {
         }
 
         private void invalidate(boolean remeasure) {
-            Check.isNotNull(view);
             view.invalidate();
             if (remeasure) {
                 offset.set(0, 0);

dragbutton/src/main/java/org/solovyev/android/views/dragbutton/DragDirection.java

@@ -2,8 +2,6 @@ package org.solovyev.android.views.dragbutton;
 
 import android.support.annotation.StyleableRes;
 
-import org.solovyev.android.calculator.R;
-
 public enum DragDirection {
 
     up(180f - 45f, 180f - 0f, R.styleable.DirectionText_directionTextUp, R.styleable.DirectionText_directionTextScaleUp, R.styleable.DirectionText_directionTextPaddingUp),

dragbutton/src/main/java/org/solovyev/android/views/dragbutton/DragGestureDetector.java

@@ -6,8 +6,6 @@ import android.support.annotation.Nullable;
 import android.view.MotionEvent;
 import android.view.View;
 
-import org.solovyev.android.Check;
-
 import static android.view.HapticFeedbackConstants.FLAG_IGNORE_GLOBAL_SETTING;
 import static android.view.HapticFeedbackConstants.FLAG_IGNORE_VIEW_SETTING;
 import static android.view.HapticFeedbackConstants.KEYBOARD_TAP;
@@ -67,7 +65,6 @@ public class DragGestureDetector {
     }
 
     private void startTracking(@NonNull MotionEvent event) {
-        Check.isNull(start);
         start = new PointF(event.getX(), event.getY());
     }
 

dragbutton/src/main/res/values/colors.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="drag_text_inverse">#424242</color>
+    <color name="drag_button_text">#ffffffff</color>
+</resources>

dragbutton/src/main/res/values/dimens.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <dimen name="drag_min_distance">15dp</dimen>
+    <dimen name="drag_direction_text_default_padding">2dp</dimen>
+    <dimen name="drag_direction_text_min_size">9dp</dimen>
+    <item name="drag_direction_text_scale" format="float" type="dimen">0.35</item>
+</resources>

settings.gradle

@@ -1 +1 @@
-include ':app', ':jscl', ':translations'
+include ':app', ':jscl', ':translations', ':dragbutton'