prefs

res/values/attrs.xml

@@ -6,7 +6,6 @@
 	</declare-styleable>
 
 	<declare-styleable name="NumberRangeSeekBar">
-		<attr name="min" format="string"/>
+		<attr name="boundaries" format="string"/>
-		<attr name="max" format="string"/>
 	</declare-styleable>
 </resources>

res/xml/preferences.xml

@@ -14,14 +14,26 @@
 
 
 		<org.solovyev.android.view.prefs.IntegerRangeSeekBarPreference
-														   a:key="touch.duration"
+				a:key="org.solovyev.android.calculator.DragButtonCalibrationActivity_distance"
-														   a:title="Duration of something"
+				a:title="Distance of drag event"
-														   a:summary="How long something will last"
+				a:text=" pxs"
-														   a:dialogMessage="Something duration"
+				a:defaultValue="40;150"
-														   a:defaultValue="5"
+				range:boundaries="15;500"/>
-														   a:text=" minutes"
+
-														   range:min="10"
+		<org.solovyev.android.view.prefs.IntegerRangeSeekBarPreference
-														   range:max="600"/>
+				a:key="org.solovyev.android.calculator.DragButtonCalibrationActivity_duration"
+				a:title="Duration of drag event"
+				a:text=" ms"
+				a:defaultValue="40;1000"
+				range:boundaries="5;4000"/>
+
+		<org.solovyev.android.view.prefs.IntegerRangeSeekBarPreference
+				a:key="org.solovyev.android.calculator.DragButtonCalibrationActivity_angle"
+				a:title="Angle of drag event"
+				a:text=" degrees"
+				a:defaultValue="130;180"
+				range:boundaries="100;180"/>
+
 	</PreferenceCategory>
 
 </PreferenceScreen>

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

@@ -11,6 +11,7 @@ import android.content.Intent;
 import android.content.SharedPreferences;
 import android.os.Bundle;
 import android.os.Handler;
+import android.preference.PreferenceManager;
 import android.util.Log;
 import android.view.KeyEvent;
 import android.view.MotionEvent;
@@ -18,12 +19,10 @@ import android.view.View;
 import android.widget.ImageView;
 import org.jetbrains.annotations.NotNull;
 import org.solovyev.android.view.widgets.*;
+import org.solovyev.common.FloatIntervalMapper;
 import org.solovyev.common.collections.ManyValuedHashMap;
 import org.solovyev.common.collections.ManyValuedMap;
-import org.solovyev.common.utils.Interval;
+import org.solovyev.common.utils.*;
-import org.solovyev.common.utils.IntervalImpl;
-import org.solovyev.common.utils.MathUtils;
-import org.solovyev.common.utils.Point2d;
 
 import java.util.ArrayList;
 import java.util.HashMap;
@@ -42,13 +41,6 @@ public class DragButtonCalibrationActivity extends Activity {
 
 	private final Map<DragButton, CalibrationArrow> map = new HashMap<DragButton, CalibrationArrow>();
 
-	public static final String PREFERENCES = "dragButtonPreferences";
-
-	public static final String PREFERENCES_FIRST_RUN = "firstRun";
-
-	public static final String PREFERENCES_MIN = "min";
-	public static final String PREFERENCES_MAX = "max";
-
 	private static final float DEFAULT_VALUE = -999;
 	private static final int MIN_HISTORY_FOR_CALIBRATION = 10;
 	public static final String INTENT_ACTION = "org.solovyev.android.calculator.DragButtonPreferencesChanged";
@@ -168,7 +160,7 @@ public class DragButtonCalibrationActivity extends Activity {
 				Log.d(this.getClass().getName(), "Time statistics: ");
 				logStatData(timeStatData);
 
-				final SharedPreferences settings = getSharedPreferences(PREFERENCES, 0);
+				final SharedPreferences settings = PreferenceManager.getDefaultSharedPreferences(this);
 				final SharedPreferences.Editor editor = settings.edit();
 
 				setPreferences(angleStatData, editor, PreferenceType.angle);
@@ -186,59 +178,61 @@ public class DragButtonCalibrationActivity extends Activity {
 	}
 
 	private void setPreferences(@NotNull Map<DragDirection, MathUtils.StatData> statData, @NotNull SharedPreferences.Editor editor, @NotNull PreferenceType preferenceType) {
+		final Mapper<Interval<Float>> mapper = new FloatIntervalMapper();
 		for (Map.Entry<DragDirection, MathUtils.StatData> entry : statData.entrySet()) {
 			final float min = (float) entry.getValue().getMean() - 2 * (float) entry.getValue().getStandardDeviation();
 			final float max = (float) entry.getValue().getMean() + 2 * (float) entry.getValue().getStandardDeviation();
-			editor.putFloat(preferenceType.name() + "_" + entry.getKey().name() + "_" + PREFERENCES_MIN, Math.max(0, min));
+			editor.putString(getPreferenceId(preferenceType, entry.getKey()), mapper.formatValue(transformInterval(preferenceType, entry.getKey(), new IntervalImpl<Float>(Math.max(0, min), max))));
-			editor.putFloat(preferenceType.name() + "_" + entry.getKey().name() + "_" + PREFERENCES_MAX, max);
 		}
 	}
 
+	// todo serso: currently we do not use direction
+	public static String getPreferenceId(@NotNull PreferenceType preferenceType, @NotNull DragDirection direction) {
+		return "org.solovyev.android.calculator.DragButtonCalibrationActivity" + "_" + preferenceType.name() /*+ "_" + direction.name()*/;
+	}
+
 	@NotNull
 	public static Preferences getPreferences(@NotNull Context context) {
-		SharedPreferences preferences = context.getSharedPreferences(PREFERENCES, MODE_PRIVATE);
+		final SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(context);
+
+		final Mapper<Interval<Float>> mapper = new FloatIntervalMapper();
 
 		final Preferences result = new Preferences();
 
 		for (PreferenceType preferenceType : PreferenceType.values()) {
 			for (DragDirection dragDirection : DragDirection.values()) {
 
-				final float defaultMin;
+				final Interval<Float> defaultValue;
-				final float defaultMax;
 				switch (preferenceType) {
 					case angle:
 						switch (dragDirection) {
 							case up:
-								defaultMin = 130f;
+								defaultValue = new IntervalImpl<Float>(130f, 180f);
-								defaultMax = 180f;
 								break;
 							case down:
-								defaultMin = 0f;
+								defaultValue = new IntervalImpl<Float>(0f, 50f);
-								defaultMax = 50f;
 								break;
 							default:
-								defaultMin = 0;
+								defaultValue = new IntervalImpl<Float>(0f, 0f);
-								defaultMax = 0;
 						}
 						break;
 					case distance:
-						defaultMin = 10f;
+						defaultValue = new IntervalImpl<Float>(10f, 150f);
-						defaultMax = 150f;
 						break;
 					case duration:
-						defaultMin = 40f;
+						defaultValue = new IntervalImpl<Float>(40f, 1000f);
-						defaultMax = 1000f;
 						break;
 					default:
-						defaultMin = DEFAULT_VALUE;
+						defaultValue = new IntervalImpl<Float>(DEFAULT_VALUE, DEFAULT_VALUE);
-						defaultMax = DEFAULT_VALUE;
 				}
 
-				final float min = preferences.getFloat(preferenceType.name() + "_" + dragDirection.name() + "_" + PREFERENCES_MIN, defaultMin);
+				final String value = preferences.getString(getPreferenceId(preferenceType, dragDirection), mapper.formatValue(defaultValue));
-				final float max = preferences.getFloat(preferenceType.name() + "_" + dragDirection.name() + "_" + PREFERENCES_MAX, defaultMax);
 
-				if (min != DEFAULT_VALUE && max != DEFAULT_VALUE) {
+				final Interval<Float> interval = mapper.parseValue(value);
-					final DragPreference directionPreference = new DragPreference(dragDirection, new IntervalImpl<Float>(min, max));
+				transformInterval(preferenceType, dragDirection, interval);
+				if (new IntervalImpl<Float>(DEFAULT_VALUE, DEFAULT_VALUE).equals(interval)) {
+					assert interval != null;
+					final DragPreference directionPreference = new DragPreference(dragDirection, interval);
 
 					Preference preference = result.getPreferencesMap().get(preferenceType);
 					if (preference == null) {
@@ -257,6 +251,17 @@ public class DragButtonCalibrationActivity extends Activity {
 		return result;
 	}
 
+	@NotNull
+	private static Interval<Float> transformInterval(@NotNull PreferenceType preferenceType, @NotNull DragDirection dragDirection, @NotNull Interval<Float> interval) {
+		if ( preferenceType == PreferenceType.angle && dragDirection == DragDirection.down ) {
+			final Interval<Float> clone = interval.clone();
+			interval.setLeftBorder(180f - clone.getRightBorder());
+			interval.setRightBorder(180f - clone.getLeftBorder());
+		}
+
+		return interval;
+	}
+
 	public static class DragPreference {
 
 		@NotNull

src/main/java/org/solovyev/android/view/prefs/AbstractDialogPreference.java

@@ -4,17 +4,19 @@ import android.content.Context;
 import android.preference.DialogPreference;
 import android.util.AttributeSet;
 import android.view.Gravity;
+import android.view.View;
 import android.widget.LinearLayout;
 import android.widget.TextView;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
+import org.solovyev.common.utils.Mapper;
 
 /**
  * User: serso
  * Date: 9/19/11
  * Time: 3:17 PM
  */
-public class AbstractDialogPreference extends DialogPreference {
+public abstract class AbstractDialogPreference<T> extends DialogPreference {
 
 	@NotNull
 	protected static final String androidns = "http://schemas.android.com/apk/res/android";
@@ -26,38 +28,118 @@ public class AbstractDialogPreference extends DialogPreference {
 	protected final Context context;
 
 	@Nullable
-	protected String dialogMessage;
+	protected String description;
 
-	public AbstractDialogPreference(Context context, AttributeSet attrs) {
+	@Nullable
+	protected T value;
+
+	@Nullable
+	private T defaultValue;
+
+	@Nullable
+	protected String valueText;
+
+	@Nullable
+	private final String defaultStringValue;
+
+
+	public AbstractDialogPreference(Context context, AttributeSet attrs, @Nullable String defaultStringValue) {
 		super(context, attrs);
 		this.context = context;
+		this.defaultStringValue = defaultStringValue;
 
-		dialogMessage = attrs.getAttributeValue(androidns, "dialogMessage");
+		final String defaultValueFromAttrs = attrs.getAttributeValue(androidns, "defaultValue");
+		if ( defaultValueFromAttrs != null ) {
+			defaultValue = getMapper().parseValue(defaultValueFromAttrs);
+		} else if (defaultStringValue != null) {
+			defaultValue = getMapper().parseValue(defaultStringValue);
+		} else {
+			throw new IllegalArgumentException();
+		}
+
+		description = attrs.getAttributeValue(androidns, "dialogMessage");
+		valueText = attrs.getAttributeValue(androidns, "text");
 	}
 
 	@Override
+	@NotNull
 	protected LinearLayout onCreateDialogView() {
-		LinearLayout.LayoutParams params;
+		if (shouldPersist()) {
-		LinearLayout layout = new LinearLayout(context);
+			value = getPersistedValue();
-		layout.setOrientation(LinearLayout.VERTICAL);
+		}
-		layout.setPadding(6, 6, 6, 6);
+
-
+		final LinearLayout result = new LinearLayout(context);
-		final TextView splashText = new TextView(context);
+		result.setOrientation(LinearLayout.VERTICAL);
-		if (dialogMessage != null) {
+		result.setPadding(6, 6, 6, 6);
-			splashText.setText(dialogMessage);
+
+		if (description != null) {
+			final TextView splashText = new TextView(context);
+			splashText.setText(description);
+			result.addView(splashText);
 		}
-		layout.addView(splashText);
 
 		valueTextView = new TextView(context);
 		valueTextView.setGravity(Gravity.CENTER_HORIZONTAL);
 		valueTextView.setTextSize(32);
-		params = new LinearLayout.LayoutParams(
+
+		final LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
 				LinearLayout.LayoutParams.FILL_PARENT,
 				LinearLayout.LayoutParams.WRAP_CONTENT);
-		layout.addView(valueTextView, params);
+		result.addView(valueTextView, params);
 
-		return layout;
+		return result;
 	}
 
+	@Override
+	protected void onSetInitialValue(boolean restore, Object defaultValue) {
+		super.onSetInitialValue(restore, defaultValue);
 
+		if (restore) {
+			if (shouldPersist()) {
+				value = getPersistedValue();
+			} else {
+				value = this.defaultValue;
+			}
+		} else {
+			value = (T) defaultValue;
+			if (shouldPersist()) {
+				persist(this.value);
+			}
+		}
+	}
+
+	@Override
+	protected void onBindDialogView(View v) {
+		super.onBindDialogView(v);
+		initPreferenceView();
+	}
+
+	protected abstract void initPreferenceView();
+
+	private T getPersistedValue() {
+		String persistedString = getPersistedString(defaultStringValue);
+		if ( persistedString == defaultStringValue ) {
+			return defaultValue;
+		} else {
+			return getMapper().parseValue(persistedString);
+		}
+	}
+
+	protected void persistValue(@Nullable T value) {
+		if (callChangeListener(value)) {
+			if (shouldPersist()) {
+				persist(value);
+			}
+		}
+	}
+
+	private void persist(@Nullable T value) {
+		final String toBePersistedString = getMapper().formatValue(value);
+		if (toBePersistedString != null) {
+			persistString(toBePersistedString);
+		}
+	}
+
+	@NotNull
+	protected abstract Mapper<T> getMapper();
 }

src/main/java/org/solovyev/android/view/prefs/IntegerRangeSeekBarPreference.java

@@ -9,7 +9,8 @@ package org.solovyev.android.view.prefs;
 import android.content.Context;
 import android.util.AttributeSet;
 import org.jetbrains.annotations.NotNull;
-import org.solovyev.common.utils.Converter;
+import org.solovyev.common.IntegerIntervalMapper;
+import org.solovyev.common.utils.*;
 
 /**
  * User: serso
@@ -24,13 +25,8 @@ public class IntegerRangeSeekBarPreference extends RangeSeekBarPreference<Intege
 
 	@NotNull
 	@Override
-	Converter<String, Integer> getConverter() {
+	protected Mapper<Interval<Integer>> getMapper() {
-		return new Converter<String, Integer>() {
+		return new IntegerIntervalMapper();
-			@NotNull
-			@Override
-			public Integer convert(@NotNull String value) {
-				return Integer.valueOf(value);
-			}
-		};
 	}
+
 }

src/main/java/org/solovyev/android/view/prefs/PersistenceValueGetter.java

@@ -0,0 +1,20 @@
+/*
+ * 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
+ */
+
+package org.solovyev.android.view.prefs;
+
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * User: serso
+ * Date: 9/20/11
+ * Time: 10:15 PM
+ */
+public interface PersistenceValueGetter<T> {
+
+	@Nullable
+	T getPersistedValue(@Nullable T defaultValue);
+}

src/main/java/org/solovyev/android/view/prefs/PersistenceValueSetter.java

@@ -0,0 +1,19 @@
+/*
+ * 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
+ */
+
+package org.solovyev.android.view.prefs;
+
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * User: serso
+ * Date: 9/20/11
+ * Time: 10:14 PM
+ */
+public interface PersistenceValueSetter<T> {
+
+	void persist(@Nullable T value);
+}

src/main/java/org/solovyev/android/view/prefs/RangeSeekBarPreference.java

@@ -2,24 +2,19 @@ package org.solovyev.android.view.prefs;
 
 import android.content.Context;
 import android.util.AttributeSet;
-import android.view.View;
 import android.widget.LinearLayout;
 import org.jetbrains.annotations.NotNull;
 import org.solovyev.android.view.widgets.AbstractRangeSeekBar;
 import org.solovyev.android.view.widgets.NumberRangeSeekBar;
-import org.solovyev.common.utils.CollectionsUtils;
+import org.solovyev.common.utils.Interval;
-import org.solovyev.common.utils.Converter;
+import org.solovyev.common.utils.NumberInterval;
-import org.solovyev.common.utils.StringMapper;
-
-import java.util.Arrays;
-import java.util.List;
 
 /**
  * User: serso
  * Date: 9/19/11
  * Time: 12:27 PM
  */
-public abstract class RangeSeekBarPreference<T extends Number> extends AbstractDialogPreference implements AbstractRangeSeekBar.OnRangeSeekBarChangeListener<T> {
+public abstract class RangeSeekBarPreference<T extends Number> extends AbstractDialogPreference<Interval<T>> implements AbstractRangeSeekBar.OnRangeSeekBarChangeListener<T> {
 
 	public final static String localNameSpace = "http://schemas.android.com/apk/res/org.solovyev.android.calculator";
 
@@ -27,52 +22,26 @@ public abstract class RangeSeekBarPreference<T extends Number> extends AbstractD
 	private AbstractRangeSeekBar<T> rangeSeekBar;
 
 	@NotNull
-	private T min;
+	private final Interval<T> boundaries;
-
-	@NotNull
-	private T max;
-
-	@NotNull
-	private T selectedMin;
-
-	@NotNull
-	private T selectedMax;
-
 
 	public RangeSeekBarPreference(@NotNull Context context, AttributeSet attrs) {
-		super(context, attrs);
+		super(context, attrs, null);
 
+		boundaries = getMapper().parseValue(attrs.getAttributeValue(localNameSpace, "boundaries"));
 
-		final Converter<String, T> c = getConverter();
+		assert boundaries != null;
-
+		this.rangeSeekBar = new NumberRangeSeekBar<T>(boundaries, null, context);
-		String minString = attrs.getAttributeValue(localNameSpace, "min");
-		min = c.convert(minString == null ? "0" : minString);
-		String maxString = attrs.getAttributeValue(localNameSpace, "max");
-		max = c.convert(maxString == null ? "100" : maxString);
-
-
-		this.rangeSeekBar = new NumberRangeSeekBar<T>(min, max, null, context);
 		rangeSeekBar.setOnRangeSeekBarChangeListener(this);
 	}
 
-	public void setMin(@NotNull String min) {
-		this.min = getConverter().convert(min);
-	}
-
-	public void setMax(@NotNull String max) {
-		this.max = getConverter().convert(max);
-	}
-
 	@NotNull
-	abstract Converter<String, T> getConverter();
-
 	@Override
 	protected LinearLayout onCreateDialogView() {
 		final LinearLayout result = super.onCreateDialogView();
 
-		this.rangeSeekBar = new NumberRangeSeekBar<T>(min, max, null, context);
+		this.rangeSeekBar = new NumberRangeSeekBar<T>(boundaries, null, context);
 		rangeSeekBar.setOnRangeSeekBarChangeListener(this);
-		initRangeSeekBar();
+		initPreferenceView();
 
 		result.addView(rangeSeekBar);
 
@@ -80,38 +49,24 @@ public abstract class RangeSeekBarPreference<T extends Number> extends AbstractD
 	}
 
 	@Override
-	protected void onBindDialogView(View v) {
+	protected void initPreferenceView() {
-		super.onBindDialogView(v);
+		if (value != null) {
-		initRangeSeekBar();
+			rangeSeekBar.setSelectedMinValue(value.getLeftBorder());
+			rangeSeekBar.setSelectedMaxValue(value.getRightBorder());
+			setValueText(value);
 		}
-
-	private void initRangeSeekBar() {
-		rangeSeekBar.setSelectedMinValue(selectedMin);
-		rangeSeekBar.setSelectedMaxValue(selectedMax);
 	}
 
-	@Override
-	protected void onSetInitialValue(boolean restore, Object defaultValue) {
-		super.onSetInitialValue(restore, defaultValue);
-
-		final List<String> values;
-		if (restore) {
-			values = CollectionsUtils.split(getPersistedString("0;100"), ";", new StringMapper());
-		} else {
-			values = CollectionsUtils.split(String.valueOf(defaultValue), ";", new StringMapper());
-		}
-
-		selectedMin = getConverter().convert(values.get(0));
-		selectedMax = getConverter().convert(values.get(1));
-	}
-
-
 	@Override
 	public void rangeSeekBarValuesChanged(T minValue, T maxValue) {
-		final String value = CollectionsUtils.formatValue(Arrays.asList(String.valueOf(minValue), String.valueOf(maxValue)), ";", new StringMapper());
+		final Interval<T> interval = new NumberInterval<T>(minValue, maxValue);
-		if (shouldPersist()) {
+		persistValue(interval);
-			persistString(value);
+
+		setValueText(interval);
 	}
-		callChangeListener(value);
+
+	private void setValueText(@NotNull Interval<T> interval) {
+		final String t = String.valueOf(interval);
+		valueTextView.setText(valueText == null ? t : t.concat(valueText));
 	}
 }

src/main/java/org/solovyev/android/view/prefs/SeekBarPreference.java

@@ -8,11 +8,11 @@ package org.solovyev.android.view.prefs;
 
 import android.content.Context;
 import android.util.AttributeSet;
-import android.view.View;
-import android.widget.SeekBar;
 import android.widget.LinearLayout;
+import android.widget.SeekBar;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
+import org.solovyev.common.utils.Mapper;
 
 
 /* The following code was written by Matthew Wiggins
@@ -21,24 +21,20 @@ import org.jetbrains.annotations.Nullable;
  * http://www.apache.org/licenses/LICENSE-2.0
  */
 
-public class SeekBarPreference extends AbstractDialogPreference implements SeekBar.OnSeekBarChangeListener {
+public class SeekBarPreference extends AbstractDialogPreference<Integer> implements SeekBar.OnSeekBarChangeListener {
 
 	@NotNull
 	private SeekBar seekBar;
 
-	private int defaultValue, max, value = 0;
+	private int max = 0;
-
-	@Nullable
-	protected String valueText;
 
 	public SeekBarPreference(Context context, AttributeSet attrs) {
-		super(context, attrs);
+		super(context, attrs, "50");
 
-		defaultValue = attrs.getAttributeIntValue(androidns, "defaultValue", 0);
 		max = attrs.getAttributeIntValue(androidns, "max", 100);
-		valueText = attrs.getAttributeValue(androidns, "text");
 	}
 
+	@NotNull
 	@Override
 	protected LinearLayout onCreateDialogView() {
 		final LinearLayout layout = super.onCreateDialogView();
@@ -47,40 +43,45 @@ public class SeekBarPreference extends AbstractDialogPreference implements SeekB
 		seekBar.setOnSeekBarChangeListener(this);
 		layout.addView(seekBar, new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT));
 
-		if (shouldPersist())
+		initPreferenceView();
-			value = getPersistedInt(defaultValue);
-
-		initSeekBar();
 
 		return layout;
 	}
 
-	private void initSeekBar() {
+	@Override
+	protected void initPreferenceView() {
 		seekBar.setMax(max);
+		if (value != null) {
 			seekBar.setProgress(value);
+			setValueText(value);
+		}
+	}
+
+	@NotNull
+	@Override
+	protected Mapper<Integer> getMapper() {
+		return new Mapper<Integer>() {
+			@Override
+			public String formatValue(@Nullable Integer integer) throws IllegalArgumentException {
+				return integer == null ? null : String.valueOf(integer);
 			}
 
 			@Override
-	protected void onBindDialogView(View v) {
+			public Integer parseValue(@Nullable String s) throws IllegalArgumentException {
-		super.onBindDialogView(v);
+				return s == null ? null : Integer.valueOf(s);
-		initSeekBar();
 			}
-
+		};
-	@Override
-	protected void onSetInitialValue(boolean restore, Object defaultValue) {
-		super.onSetInitialValue(restore, defaultValue);
-		if (restore)
-			value = shouldPersist() ? getPersistedInt(this.defaultValue) : 0;
-		else
-			value = (Integer) defaultValue;
 	}
 
 	public void onProgressChanged(SeekBar seek, int value, boolean fromTouch) {
+		setValueText(value);
+
+		persistValue(value);
+	}
+
+	private void setValueText(int value) {
 		String t = String.valueOf(value);
 		valueTextView.setText(valueText == null ? t : t.concat(valueText));
-		if (shouldPersist())
-			persistInt(value);
-		callChangeListener(new Integer(value));
 	}
 
 	public void onStartTrackingTouch(SeekBar seek) {
@@ -99,7 +100,6 @@ public class SeekBarPreference extends AbstractDialogPreference implements SeekB
 
 	public void setProgress(int progress) {
 		value = progress;
-		if (seekBar != null)
 		seekBar.setProgress(progress);
 	}
 

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

@@ -4,6 +4,7 @@ import android.content.Context;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.solovyev.common.utils.Converter;
+import org.solovyev.common.utils.Interval;
 import org.solovyev.common.utils.NumberValuer;
 
 /**
@@ -16,6 +17,11 @@ public class NumberRangeSeekBar<T extends Number> extends AbstractRangeSeekBar<T
 	@NotNull
 	private final NumberType numberType;
 
+
+	public NumberRangeSeekBar(@NotNull Interval<T> boundaries, @Nullable Integer steps, Context context) throws IllegalArgumentException {
+		this(boundaries.getLeftBorder(), boundaries.getRightBorder(), steps, context);
+	}
+
 	/**
 	 * Creates a new RangeSeekBar.
 	 *

src/main/java/org/solovyev/common/AbstractIntervalMapper.java

@@ -0,0 +1,45 @@
+/*
+ * 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
+ */
+
+package org.solovyev.common;
+
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+import org.solovyev.common.utils.*;
+
+import java.util.Arrays;
+import java.util.List;
+
+/**
+ * User: serso
+ * Date: 9/21/11
+ * Time: 12:02 AM
+ */
+public abstract class AbstractIntervalMapper<T> implements Mapper<Interval<T>> {
+
+	@Override
+	public String formatValue(@Nullable Interval<T> interval) throws IllegalArgumentException {
+		if (interval != null) {
+			return CollectionsUtils.formatValue(Arrays.asList(interval.getLeftBorder(), interval.getRightBorder()), ";", getFormatter());
+		} else {
+			return null;
+		}
+	}
+
+	@NotNull
+	protected abstract Formatter<T> getFormatter();
+
+	@Override
+	public Interval<T> parseValue(@Nullable String s) throws IllegalArgumentException {
+		final List<T> list = CollectionsUtils.split(s, ";", getParser());
+
+		assert list.size() == 2;
+		return new IntervalImpl<T>(list.get(0), list.get(1));
+	}
+
+	@NotNull
+	protected abstract Parser<T> getParser();
+}

src/main/java/org/solovyev/common/FloatIntervalMapper.java

@@ -0,0 +1,37 @@
+/*
+ * 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
+ */
+
+package org.solovyev.common;
+
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+import org.solovyev.common.math.ValueOfFormatter;
+import org.solovyev.common.utils.Formatter;
+import org.solovyev.common.utils.Parser;
+
+/**
+ * User: serso
+ * Date: 9/21/11
+ * Time: 12:06 AM
+ */
+public class FloatIntervalMapper extends AbstractIntervalMapper<Float> {
+	@NotNull
+	@Override
+	protected Formatter<Float> getFormatter() {
+		return new ValueOfFormatter<Float>();
+	}
+
+	@NotNull
+	@Override
+	protected Parser<Float> getParser() {
+		return new Parser<Float>() {
+			@Override
+			public Float parseValue(@Nullable String s) throws IllegalArgumentException {
+				return Float.valueOf(s);
+			}
+		};
+	}
+}

src/main/java/org/solovyev/common/IntegerIntervalMapper.java

@@ -0,0 +1,35 @@
+/*
+ * 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
+ */
+
+package org.solovyev.common;
+
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+import org.solovyev.common.math.ValueOfFormatter;
+import org.solovyev.common.utils.*;
+
+/**
+* User: serso
+* Date: 9/20/11
+* Time: 11:56 PM
+*/
+public class IntegerIntervalMapper extends AbstractIntervalMapper<Integer> {
+
+	@NotNull
+	protected Formatter<Integer> getFormatter() {
+		return new ValueOfFormatter<Integer>();
+	}
+
+	@NotNull
+	protected Parser<Integer> getParser() {
+		return new Parser<Integer>() {
+			@Override
+			public Integer parseValue(@Nullable String s) throws IllegalArgumentException {
+				return Integer.valueOf(s);
+			}
+		};
+	}
+}

src/main/java/org/solovyev/common/math/ValueOfFormatter.java

@@ -0,0 +1,23 @@
+/*
+ * 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
+ */
+
+package org.solovyev.common.math;
+
+import org.jetbrains.annotations.Nullable;
+import org.solovyev.common.utils.Formatter;
+
+/**
+ * User: serso
+ * Date: 9/20/11
+ * Time: 10:52 PM
+ */
+public class ValueOfFormatter<T> implements Formatter<T>{
+
+	@Override
+	public String formatValue(@Nullable T t) throws IllegalArgumentException {
+		return String.valueOf(t);
+	}
+}