changes: themes support, scale for direction text

res/drawable/light_blue_button.xml

@@ -1,6 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 
-<shape xmlns:android="http://schemas.android.com/apk/res/android">
+<shape xmlns:a="http://schemas.android.com/apk/res/android">
-	<gradient android:startColor="#0f2e47" android:endColor="#3a5366" android:angle="90"/>
+	<gradient a:startColor="#002761"
-    <corners android:radius="0dp" />
+			  a:endColor="#005ce5"
+			  a:angle="90"/>
+    <corners a:radius="0dp" />
 </shape>

res/drawable/violet_button.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+  ~ Copyright (c) 2009-2011. Created by serso aka se.solovyev.
+  ~ For more information, please, contact se.solovyev@gmail.com
+  ~ or visit http://se.solovyev.org
+  -->
+
+<shape xmlns:a="http://schemas.android.com/apk/res/android">
+	<gradient a:startColor="#520546"
+			  a:endColor="#8a307c"
+			  a:angle="90"/>
+	<corners a:radius="0dp"/>
+</shape>

res/layout/calc_division_button.xml

@@ -10,5 +10,6 @@
 													   xmlns:calc="http://schemas.android.com/apk/res/org.solovyev.android.calculator"
 													   a:id="@+id/divisionButton" a:text="/"
 													   calc:textUp="√"
-													   style="@style/digit_button_style"
+													   calc:directionTextScale="0.5"
+													   style="?digitButtonStyle"
 													   a:onClick="digitButtonClickHandler"/>

res/layout/calc_eight_digit_button.xml

@@ -11,5 +11,7 @@
 													   a:id="@+id/eightDigitButton" a:text="8"
 													   calc:textUp="ln"
 													   calc:textDown=""
-													   style="@style/digit_button_style"
+													   calc:directionTextScale="0.5"
+
+													   style="?digitButtonStyle"
 													   a:onClick="digitButtonClickHandler"/>

res/layout/calc_five_digit_button.xml

@@ -11,5 +11,5 @@
 													   a:text="5"
 													   calc:textUp="cosh"
 													   calc:textDown="acosh"
-													   style="@style/digit_button_style"
+													   style="?digitButtonStyle"
 													   a:onClick="digitButtonClickHandler"/>

res/layout/calc_four_digit_button.xml

@@ -11,5 +11,5 @@
 													   a:text="4"
 													   calc:textUp="sinh"
 													   calc:textDown="asinh"
-													   style="@style/digit_button_style"
+													   style="?digitButtonStyle"
 													   a:onClick="digitButtonClickHandler"/>

res/layout/calc_multiplication_button.xml

@@ -12,5 +12,7 @@
 													   a:text="×"
 													   calc:textUp="^"
 													   calc:textDown="^2"
-													   style="@style/digit_button_style"
+													   style="?digitButtonStyle"
+													   calc:directionTextScale="0.5"
+
 													   a:onClick="digitButtonClickHandler"/>

res/layout/calc_nine_digit_button.xml

@@ -11,5 +11,7 @@
 													   a:id="@+id/nineDigitButton" a:text="9"
 													   calc:textDown="e"
 													   calc:textUp="π"
-													   style="@style/digit_button_style"
+													   calc:directionTextScale="0.5"
+
+													   style="?digitButtonStyle"
 													   a:onClick="digitButtonClickHandler"/>

res/layout/calc_one_digit_button.xml

@@ -12,5 +12,5 @@
 													   a:text="1"
 													   calc:textUp="sin"
 													   calc:textDown="asin"
-													   style="@style/digit_button_style"
+													   style="?digitButtonStyle"
 													   a:onClick="digitButtonClickHandler"/>

res/layout/calc_plus_button.xml

@@ -7,6 +7,9 @@
   -->
 <org.solovyev.android.view.widgets.DirectionDragButton xmlns:a="http://schemas.android.com/apk/res/android"
 													   xmlns:calc="http://schemas.android.com/apk/res/org.solovyev.android.calculator"
-													   a:id="@+id/plusButton" a:text="+"
+													   a:id="@+id/plusButton"
-													   style="@style/digit_button_style"
+													   calc:directionTextScale="0.5"
+
+													   a:text="+"
+													   style="?digitButtonStyle"
 													   a:onClick="digitButtonClickHandler"/>

res/layout/calc_round_brackets_button.xml

@@ -11,5 +11,7 @@
 													   a:id="@+id/roundBracketsButton" a:text="()"
 													   calc:textUp="("
 													   calc:textDown=")"
-													   style="@style/digit_button_style"
+													   calc:directionTextScale="0.5"
+
+													   style="?digitButtonStyle"
 													   a:onClick="digitButtonClickHandler"/>

res/layout/calc_seven_digit_button.xml

@@ -11,5 +11,7 @@
 													   a:id="@+id/sevenDigitButton" a:text="7"
 													   calc:textUp="i"
 													   calc:textDown=""
-													   style="@style/digit_button_style"
+													   calc:directionTextScale="0.5"
+
+													   style="?digitButtonStyle"
 													   a:onClick="digitButtonClickHandler"/>

res/layout/calc_six_digit_button.xml

@@ -11,5 +11,5 @@
 													   a:id="@+id/sixDigitButton" a:text="6"
 													   calc:textUp="tanh"
 													   calc:textDown="atanh"
-													   style="@style/digit_button_style"
+													   style="?digitButtonStyle"
 													   a:onClick="digitButtonClickHandler"/>

res/layout/calc_square_brackets_button.xml

@@ -11,5 +11,7 @@
 													   a:id="@+id/squareBracketsButton" a:text="[]"
 													   calc:textUp="["
 													   calc:textDown="]"
-													   style="@style/digit_button_style"
+													   calc:directionTextScale="0.5"
+
+													   style="?digitButtonStyle"
 													   a:onClick="digitButtonClickHandler"/>

res/layout/calc_subtraction_button.xml

@@ -10,5 +10,7 @@
 													   a:id="@+id/subtractionButton" a:text="-"
 													   calc:textUp="{"
 													   calc:textDown="}"
-													   style="@style/digit_button_style"
+													   calc:directionTextScale="0.5"
+
+													   style="?digitButtonStyle"
 													   a:onClick="digitButtonClickHandler"/>

res/layout/calc_three_digit_button.xml

@@ -12,5 +12,5 @@
 													   a:text="3"
 													   calc:textUp="tan"
 													   calc:textDown="atan"
-													   style="@style/digit_button_style"
+													   style="?digitButtonStyle"
 													   a:onClick="digitButtonClickHandler"/>

res/layout/calc_two_digit_button.xml

@@ -12,5 +12,5 @@
 													   a:text="2"
 													   calc:textUp="cos"
 													   calc:textDown="acos"
-													   style="@style/digit_button_style"
+													   style="?digitButtonStyle"
 													   a:onClick="digitButtonClickHandler"/>

res/layout/calc_zero_digit_button.xml

@@ -11,5 +11,7 @@
 													   a:id="@+id/zeroDigitButton" a:text="0"
 													   calc:textUp="."
 													   calc:textDown=","
-													   style="@style/digit_button_style"
+													   calc:directionTextScale="0.5"
+
+													   style="?digitButtonStyle"
 													   a:onClick="digitButtonClickHandler"/>

res/layout/drag_button_calibration.xml

@@ -27,7 +27,7 @@
 														   calc:textDown="@string/c_down"
 														   a:layout_width="80dp"
 														   a:layout_height="80dp"
-														   style="@style/digit_button_style"/>
+														   style="?digitButtonStyle"/>
 
 			<org.solovyev.android.view.widgets.DirectionDragButton a:id="@+id/calibrationButtonRight"
 														   a:text=""
@@ -35,7 +35,7 @@
 														   calc:textDown="@string/c_down"
 														   a:layout_width="80dp"
 														   a:layout_height="80dp"
-														   style="@style/digit_button_style"/>
+														   style="?digitButtonStyle"/>
 
 			<ImageView a:id="@+id/calibrationArrowRight"
 					   a:layout_gravity="right"

res/values/arrays.xml

@@ -0,0 +1,18 @@
+<!--
+  ~ Copyright (c) 2009-2011. Created by serso aka se.solovyev.
+  ~ For more information, please, contact se.solovyev@gmail.com
+  ~ or visit http://se.solovyev.org
+  -->
+
+<resources>
+	<string-array name="p_theme_names">
+		<item>Default</item>
+		<item>Violet</item>
+		<item>Light blue</item>
+	</string-array>
+	<string-array name="p_theme_values">
+		<item>default_theme</item>
+		<item>violet_theme</item>
+		<item>light_blue_theme</item>
+	</string-array>
+</resources>

res/values/attrs.xml

@@ -3,6 +3,7 @@
 	<declare-styleable name="DragButton">
 		<attr name="textUp" format="string"/>
 		<attr name="textDown" format="string"/>
+		<attr name="directionTextScale" format="float"/>
 	</declare-styleable>
 
 	<declare-styleable name="NumberRangeSeekBar">
@@ -10,4 +11,6 @@
 		<attr name="steps" format="integer"/>
 	</declare-styleable>
 
+	<attr name="digitButtonStyle" format="reference" />
+
 </resources>

res/values/default_values.xml

@@ -20,4 +20,8 @@
 	<string name="p_calc_color_display">true</string>
 
 	<string name="p_calc_vars">org.solovyev.android.calculator.CalculatorModel_vars</string>
+
+	<string name="p_calc_theme_key">org.solovyev.android.calculator.CalculatorActivity_calc_theme</string>
+	<string name="p_calc_theme">default_theme</string>
+
 </resources>

res/values/strings.xml

@@ -75,4 +75,5 @@
 	<string name="c_history_is_empty">History is empty!</string>
 	<string name="c_app_history">History</string>
 	<string name="c_char_is_not_accepted">Character \'%s\' is not accepted in variable name!</string>
+	<string name="c_calc_theme">Theme</string>
 </resources>

res/values/styles.xml

@@ -15,13 +15,23 @@
 		<item name="android:textSize">20dp</item>
 		<item name="android:background">@drawable/button</item>
 		<item name="android:layout_marginLeft">1dp</item>
+		<item name="android:layout_marginBottom">1dp</item>
 	</style>
 
-	<style name="digit_button_style" parent="button_style">
+	<style name="default_digit_button_style" parent="button_style">
 		<item name="android:background">@drawable/blue_button</item>
 	</style>
 
+	<style name="violet_digit_button_style" parent="button_style">
+		<item name="android:background">@drawable/violet_button</item>
+	</style>
+
+	<style name="light_blue_digit_button_style" parent="button_style">
+		<item name="android:background">@drawable/light_blue_button</item>
+	</style>
+
 	<style name="control_button_style" parent="button_style"/>
+
 	<style name="control_image_button_style" parent="control_button_style">
 		<item name="android:padding">6dp</item>
 	</style>
@@ -56,5 +66,16 @@
 		<item name="android:layout_height">match_parent</item>
 	</style>
 
+	<style name="default_theme">
+		<item name="digitButtonStyle">@style/default_digit_button_style</item>
+	</style>
+
+	<style name="violet_theme">
+		<item name="digitButtonStyle">@style/violet_digit_button_style</item>
+	</style>
+
+	<style name="light_blue_theme">
+		<item name="digitButtonStyle">@style/light_blue_digit_button_style</item>
+	</style>
 
 </resources>

res/xml/main_preferences.xml

@@ -15,7 +15,16 @@
 				a:title="@string/c_calc_color_display_title"
 				a:defaultValue="true"/>
 
-<!--		<org.solovyev.android.view.prefs.FloatRangeSeekBarPreference
+		<ListPreference a:key="@string/p_calc_theme_key"
+						a:title="@string/c_calc_theme"
+						a:entries="@array/p_theme_names"
+						a:entryValues="@array/p_theme_values"
+						a:persistent="true"
+						a:defaultValue="2"
+						a:shouldDisableView="false"/>
+
+
+		<!--		<org.solovyev.android.view.prefs.FloatRangeSeekBarPreference
 			  a:key="@string/p_drag_distance_key"
 			  a:title="Distance of drag event"
 			  a:text=" pxs"

src/main/java/org/solovyev/android/calculator/CalculatorActivity.java

@@ -31,6 +31,10 @@ import org.solovyev.common.utils.history.HistoryAction;
 
 import java.lang.reflect.Field;
 import java.lang.reflect.Modifier;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
 
 public class CalculatorActivity extends Activity implements FontSizeAdjuster, SharedPreferences.OnSharedPreferenceChangeListener {
 
@@ -54,11 +58,26 @@ public class CalculatorActivity extends Activity implements FontSizeAdjuster, Sh
 
 	private volatile boolean initialized;
 
+	@NotNull
+	private String themeName;
+
+	// key: style name, value: id of style in R.class
+	private Map<String, Integer> styles = null;
+
+	// ids of drag buttons in R.class
+	private List<Integer> dragButtonIds = null;
+
+
 	/**
 	 * Called when the activity is first created.
 	 */
 	@Override
 	public void onCreate(@Nullable Bundle savedInstanceState) {
+		Log.d(this.getClass().getName(), "org.solovyev.android.calculator.CalculatorActivity.onCreate()");
+
+		final SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(this);
+
+		setTheme(preferences);
 		super.onCreate(savedInstanceState);
 		setContentView(R.layout.main);
 
@@ -68,28 +87,9 @@ public class CalculatorActivity extends Activity implements FontSizeAdjuster, Sh
 
 		dpclRegister.clear();
 
-		final SimpleOnDragListener.Preferences dragPreferences = SimpleOnDragListener.getPreferences(this);
+		final SimpleOnDragListener.Preferences dragPreferences = SimpleOnDragListener.getPreferences(preferences, this);
 
-		final SimpleOnDragListener onDragListener = new SimpleOnDragListener(new DigitButtonDragProcessor(calculatorView), dragPreferences);
+		setOnDragListeners(dragPreferences);
-		dpclRegister.addListener(onDragListener);
-
-		// todo serso: check if there is more convenient method for doing this
-		final R.id ids = new R.id();
-		for (Field field : R.id.class.getDeclaredFields()) {
-			int modifiers = field.getModifiers();
-			if (Modifier.isFinal(modifiers) && Modifier.isStatic(modifiers)) {
-				try {
-					final View view = findViewById(field.getInt(ids));
-					if (view instanceof DragButton) {
-						((DragButton) view).setOnDragListener(onDragListener);
-					}
-				} catch (IllegalArgumentException e) {
-					Log.e(CalculatorActivity.class.getName(), e.getMessage());
-				} catch (IllegalAccessException e) {
-					Log.e(CalculatorActivity.class.getName(), e.getMessage());
-				}
-			}
-		}
 
 		final SimpleOnDragListener historyOnDragListener = new SimpleOnDragListener(new HistoryDragProcessor<CalculatorHistoryState>(this.calculatorView), dragPreferences);
 		((DragButton) findViewById(R.id.historyButton)).setOnDragListener(historyOnDragListener);
@@ -100,10 +100,68 @@ public class CalculatorActivity extends Activity implements FontSizeAdjuster, Sh
 		((DragButton) findViewById(R.id.leftButton)).setOnDragListener(toPositionOnDragListener);
 		dpclRegister.addListener(toPositionOnDragListener);
 
-		final SharedPreferences defaultSharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+		preferences.registerOnSharedPreferenceChangeListener(this);
-		defaultSharedPreferences.registerOnSharedPreferenceChangeListener(this);
 
-		this.onSharedPreferenceChanged(defaultSharedPreferences, null);
+		this.onSharedPreferenceChanged(preferences, null);
+	}
+
+	private synchronized void setOnDragListeners(@NotNull SimpleOnDragListener.Preferences dragPreferences) {
+		final SimpleOnDragListener onDragListener = new SimpleOnDragListener(new DigitButtonDragProcessor(calculatorView), dragPreferences);
+		dpclRegister.addListener(onDragListener);
+
+		if (dragButtonIds == null) {
+			dragButtonIds = new ArrayList<Integer>();
+
+			for (Field field : R.id.class.getDeclaredFields()) {
+				int modifiers = field.getModifiers();
+				if (Modifier.isFinal(modifiers) && Modifier.isStatic(modifiers)) {
+					try {
+						int dragButtonId = field.getInt(R.id.class);
+						final View view = findViewById(dragButtonId);
+						if (view instanceof DragButton) {
+							dragButtonIds.add(dragButtonId);
+						}
+					} catch (IllegalAccessException e) {
+						Log.e(CalculatorActivity.class.getName(), e.getMessage());
+					}
+				}
+			}
+		}
+
+		for (Integer dragButtonId : dragButtonIds) {
+			((DragButton) findViewById(dragButtonId)).setOnDragListener(onDragListener);
+		}
+	}
+
+	private synchronized void setTheme(@NotNull SharedPreferences preferences) {
+		if (styles == null) {
+			styles = new HashMap<String, Integer>();
+			for (Field themeField : R.style.class.getDeclaredFields()) {
+				int modifiers = themeField.getModifiers();
+				if (Modifier.isFinal(modifiers) && Modifier.isStatic(modifiers)) {
+					try {
+						Log.d(this.getClass().getName(), "Style found: " + themeField.getName());
+						int styleId = themeField.getInt(R.style.class);
+						Log.d(this.getClass().getName(), "Style id: " + styleId);
+						styles.put(themeField.getName(), styleId);
+					} catch (IllegalAccessException e) {
+						Log.e(CalculatorActivity.class.getName(), e.getMessage());
+					}
+				}
+			}
+		}
+
+		themeName = preferences.getString(getString(R.string.p_calc_theme_key), getString(R.string.p_calc_theme));
+
+		Integer styleId = styles.get(themeName);
+		if (styleId == null) {
+			Log.d(this.getClass().getName(), "No saved theme found => applying default theme: " + R.style.default_theme);
+			styleId = R.style.default_theme;
+		} else {
+			Log.d(this.getClass().getName(), "Saved them found: " + styleId);
+		}
+
+		setTheme(styleId);
 	}
 
 	private void init() {
@@ -130,6 +188,7 @@ public class CalculatorActivity extends Activity implements FontSizeAdjuster, Sh
 							@Override
 							public void doOperation(@NotNull EditText editor) {
 								editor.setText(s);
+								calculatorView.setCursorOnEnd();
 							}
 						});
 					}
@@ -146,13 +205,13 @@ public class CalculatorActivity extends Activity implements FontSizeAdjuster, Sh
 			try {
 				CalculatorModel.instance.init(this);
 			} catch (EvalError evalError) {
-				// todo serso: create serso runtime exception
 				throw new RuntimeException("Could not initialize interpreter!");
 			}
 			initialized = true;
 		}
 	}
 
+
 	@Override
 	protected void onDestroy() {
 		unregisterReceiver(textReceiver);
@@ -332,15 +391,39 @@ public class CalculatorActivity extends Activity implements FontSizeAdjuster, Sh
 		view.setTextSize(TypedValue.COMPLEX_UNIT_PX, fontPixelSize * ratio);
 	}
 
+	public void restart() {
+		final Intent intent = getIntent();
+		overridePendingTransition(0, 0);
+		intent.addFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION);
+
+		Log.d(this.getClass().getName(), "Finishing current activity!");
+		finish();
+
+		overridePendingTransition(0, 0);
+		Log.d(this.getClass().getName(), "Starting new activity!");
+		startActivity(intent);
+	}
+
 	@Override
-	public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, @Nullable String s) {
+	protected void onResume() {
-		dpclRegister.announce().onDragPreferencesChange(SimpleOnDragListener.getPreferences(CalculatorActivity.this));
+		super.onResume();
+
+		final SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(this);
+		final String newThemeName = preferences.getString(getString(R.string.p_calc_theme_key), getString(R.string.p_calc_theme));
+		if (!newThemeName.equals(themeName)) {
+			restart();
+		}
+	}
+
+	@Override
+	public void onSharedPreferenceChanged(SharedPreferences preferences, @Nullable String s) {
+		dpclRegister.announce().onDragPreferencesChange(SimpleOnDragListener.getPreferences(preferences, this));
 
 		CalculatorModel.instance.reset(this);
 
 		final Boolean colorExpressionsInBracketsDefault = new BooleanMapper().parseValue(this.getString(R.string.p_calc_color_display));
 		assert colorExpressionsInBracketsDefault != null;
-		this.calculatorView.getEditor().setHighlightText(sharedPreferences.getBoolean(this.getString(R.string.p_calc_color_display_key), colorExpressionsInBracketsDefault));
+		this.calculatorView.getEditor().setHighlightText(preferences.getBoolean(this.getString(R.string.p_calc_color_display_key), colorExpressionsInBracketsDefault));
 
 		this.calculatorView.evaluate();
 	}

src/main/java/org/solovyev/android/view/widgets/DirectionDragButton.java

@@ -13,6 +13,7 @@ import android.text.TextPaint;
 import android.util.AttributeSet;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
+import org.solovyev.android.calculator.R;
 import org.solovyev.common.utils.Point2d;
 import org.solovyev.common.utils.StringUtils;
 
@@ -23,6 +24,9 @@ import org.solovyev.common.utils.StringUtils;
  */
 public class DirectionDragButton extends DragButton {
 
+	@NotNull
+	private final static Float DEFAULT_DIRECTION_TEXT_SCALE = 0.33f;
+
 	@Nullable
 	private String textUp;
 
@@ -41,6 +45,9 @@ public class DirectionDragButton extends DragButton {
 	@NotNull
 	private TextPaint upDownTextPaint;
 
+	@Nullable
+	private Float directionTextScale = DEFAULT_DIRECTION_TEXT_SCALE;
+
 	public DirectionDragButton(Context context, @NotNull AttributeSet attrs) {
 		super(context, attrs, false);
 		init(context, attrs);
@@ -76,12 +83,15 @@ public class DirectionDragButton extends DragButton {
 		for (int i = 0; i < N; i++) {
 			int attr = a.getIndex(i);
 			switch (attr) {
-				case org.solovyev.android.calculator.R.styleable.DragButton_textUp:
+				case R.styleable.DragButton_textUp:
 					this.textUp = a.getString(attr);
 					break;
-				case org.solovyev.android.calculator.R.styleable.DragButton_textDown:
+				case R.styleable.DragButton_textDown:
 					this.textDown = a.getString(attr);
 					break;
+				case R.styleable.DragButton_directionTextScale:
+					this.directionTextScale = Float.valueOf(a.getString(attr));
+					break;
 			}
 		}
 
@@ -99,15 +109,15 @@ public class DirectionDragButton extends DragButton {
 		initUpDownTextPaint(basePaint);
 
 		if (textUp != null) {
-			textUpPosition = getTextPosition(upDownTextPaint, basePaint, textUp, getText(), 1, getWidth(), getHeight());
+			textUpPosition = getTextPosition(upDownTextPaint, basePaint, textUp, getText(), 1, getWidth(), getHeight(), getDirectionTextScale());
 		}
 
 		if (textDown != null) {
-			textDownPosition = getTextPosition(upDownTextPaint, basePaint, textDown, getText(), -1, getWidth(), getHeight());
+			textDownPosition = getTextPosition(upDownTextPaint, basePaint, textDown, getText(), -1, getWidth(), getHeight(), getDirectionTextScale());
 		}
 
-		if ( textDownPosition != null && textUpPosition != null ) {
+		if (textDownPosition != null && textUpPosition != null) {
-			if ( textDownPosition.getX() > textUpPosition.getX() ) {
+			if (textDownPosition.getX() > textUpPosition.getX()) {
 				textDownPosition.setX(textUpPosition.getX());
 			} else {
 				textUpPosition.setX(textDownPosition.getX());
@@ -116,7 +126,7 @@ public class DirectionDragButton extends DragButton {
 
 	}
 
-	public static Point2d getTextPosition(@NotNull Paint paint, @NotNull Paint basePaint, @NotNull CharSequence text, CharSequence baseText, float direction, int w, int h) {
+	public static Point2d getTextPosition(@NotNull Paint paint, @NotNull Paint basePaint, @NotNull CharSequence text, CharSequence baseText, float direction, int w, int h, float scale) {
 		final Point2d result = new Point2d();
 
 		float width = paint.measureText(text.toString() + " ");
@@ -157,15 +167,7 @@ public class DirectionDragButton extends DragButton {
 
 		upDownTextPaint = new TextPaint(paint);
 		upDownTextPaint.setAlpha(150);
-		upDownTextPaint.setTextSize(paint.getTextSize() / 3);
+		upDownTextPaint.setTextSize(paint.getTextSize() * getDirectionTextScale());
-	}
-
-	private String getStyledUpDownText(@Nullable String text) {
-		return StringUtils.getNotEmpty(text, "&nbsp;");
-	}
-
-	public void setTextUp(@Nullable String textUp) {
-		this.textUp = textUp;
 	}
 
 	@Nullable
@@ -173,19 +175,11 @@ public class DirectionDragButton extends DragButton {
 		return textUp;
 	}
 
-	public void setTextDown(@Nullable String textDown) {
-		this.textDown = textDown;
-	}
-
 	@Nullable
 	public String getTextDown() {
 		return textDown;
 	}
 
-	public void setTextMiddle(@Nullable String textMiddle) {
-		this.textMiddle = textMiddle;
-	}
-
 	@Nullable
 	public String getTextMiddle() {
 		return textMiddle;
@@ -197,7 +191,7 @@ public class DirectionDragButton extends DragButton {
 
 		if (direction == DragDirection.up) {
 			result = getTextUp();
-		} else if ( direction == DragDirection.down ) {
+		} else if (direction == DragDirection.down) {
 			result = getTextDown();
 		} else {
 			result = null;
@@ -205,4 +199,10 @@ public class DirectionDragButton extends DragButton {
 
 		return result;
 	}
+
+	@NotNull
+	public Float getDirectionTextScale() {
+		return directionTextScale == null ? DEFAULT_DIRECTION_TEXT_SCALE : directionTextScale;
+	}
+
 }

src/main/java/org/solovyev/android/view/widgets/SimpleOnDragListener.java

@@ -7,7 +7,6 @@ package org.solovyev.android.view.widgets;
 
 import android.content.Context;
 import android.content.SharedPreferences;
-import android.preference.PreferenceManager;
 import android.util.Log;
 import android.view.MotionEvent;
 import org.jetbrains.annotations.NotNull;
@@ -146,8 +145,7 @@ public class SimpleOnDragListener implements OnDragListener, DragPreferencesChan
 	}
 
 	@NotNull
-	public static Preferences getPreferences(@NotNull Context context) {
+	public static Preferences getPreferences(@NotNull final SharedPreferences preferences, @NotNull Context context) {
-		final SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(context);
 
 		final Mapper<Interval<Float>> mapper = new NumberIntervalMapper<Float>(Float.class);