3 files changed, 825 insertions, 0 deletions
diff --git a/src/com/android/settings/hardware/DisplayColor.java b/src/com/android/settings/hardware/DisplayColor.java
new file mode 100644
index 0000000..f9dd845
--- /dev/null
+++ b/src/com/android/settings/hardware/DisplayColor.java
@@ -0,0 +1,268 @@
+/*
+ * Copyright (C) 2013 The CyanogenMod Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.hardware;
+
+import android.app.AlertDialog;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.SharedPreferences;
+import android.content.SharedPreferences.Editor;
+import android.os.Bundle;
+import android.os.Parcel;
+import android.os.Parcelable;
+import android.preference.DialogPreference;
+import android.preference.PreferenceManager;
+import android.text.TextUtils;
+import android.util.AttributeSet;
+import android.view.View;
+import android.widget.SeekBar;
+import android.widget.TextView;
+import android.widget.Button;
+
+import com.android.settings.R;
+
+import org.cyanogenmod.hardware.DisplayColorCalibration;
+
+/**
+ * Special preference type that allows configuration of Color settings
+ */
+public class DisplayColor extends DialogPreference {
+    private static final String TAG = "ColorCalibration";
+
+    // These arrays must all match in length and order
+    private static final int[] SEEKBAR_ID = new int[] {
+        R.id.color_red_seekbar,
+        R.id.color_green_seekbar,
+        R.id.color_blue_seekbar
+    };
+
+    private static final int[] SEEKBAR_VALUE_ID = new int[] {
+        R.id.color_red_value,
+        R.id.color_green_value,
+        R.id.color_blue_value
+    };
+
+    private ColorSeekBar[] mSeekBars = new ColorSeekBar[SEEKBAR_ID.length];
+    private String[] mCurrentColors;
+    private String mOriginalColors;
+
+    public DisplayColor(Context context, AttributeSet attrs) {
+        super(context, attrs);
+
+        if (!isSupported()) {
+            return;
+        }
+
+        setDialogLayoutResource(R.layout.display_color_calibration);
+    }
+
+    @Override
+    protected void onPrepareDialogBuilder(AlertDialog.Builder builder) {
+        builder.setNeutralButton(R.string.auto_brightness_reset_button,
+                new DialogInterface.OnClickListener() {
+            @Override
+            public void onClick(DialogInterface dialog, int which) {
+            }
+        });
+    }
+
+    @Override
+    protected void onBindDialogView(View view) {
+        super.onBindDialogView(view);
+
+        mOriginalColors = DisplayColorCalibration.getCurColors();
+        mCurrentColors = mOriginalColors.split(" ");
+
+        for (int i = 0; i < SEEKBAR_ID.length; i++) {
+            SeekBar seekBar = (SeekBar) view.findViewById(SEEKBAR_ID[i]);
+            TextView value = (TextView) view.findViewById(SEEKBAR_VALUE_ID[i]);
+            mSeekBars[i] = new ColorSeekBar(seekBar, value, i);
+            mSeekBars[i].setValueFromString(mCurrentColors[i]);
+        }
+    }
+
+    @Override
+    protected void showDialog(Bundle state) {
+        super.showDialog(state);
+
+        // Can't use onPrepareDialogBuilder for this as we want the dialog
+        // to be kept open on click
+        AlertDialog d = (AlertDialog) getDialog();
+        Button defaultsButton = d.getButton(DialogInterface.BUTTON_NEUTRAL);
+        defaultsButton.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                int defaultValue = DisplayColorCalibration.getDefValue();
+                for (int i = 0; i < mSeekBars.length; i++) {
+                    mSeekBars[i].mSeekBar.setProgress(defaultValue);
+                    mCurrentColors[i] = String.valueOf(defaultValue);
+                }
+                DisplayColorCalibration.setColors(TextUtils.join(" ", mCurrentColors));
+            }
+        });
+    }
+
+    @Override
+    protected void onDialogClosed(boolean positiveResult) {
+        super.onDialogClosed(positiveResult);
+
+        if (positiveResult) {
+            Editor editor = getEditor();
+            editor.putString("display_color_calibration", DisplayColorCalibration.getCurColors());
+            editor.commit();
+        } else if (mOriginalColors != null) {
+            DisplayColorCalibration.setColors(mOriginalColors);
+        }
+    }
+
+    @Override
+    protected Parcelable onSaveInstanceState() {
+        final Parcelable superState = super.onSaveInstanceState();
+        if (getDialog() == null || !getDialog().isShowing()) {
+            return superState;
+        }
+
+        // Save the dialog state
+        final SavedState myState = new SavedState(superState);
+        myState.currentColors = mCurrentColors;
+        myState.originalColors = mOriginalColors;
+
+        // Restore the old state when the activity or dialog is being paused
+        DisplayColorCalibration.setColors(mOriginalColors);
+        mOriginalColors = null;
+
+        return myState;
+    }
+
+    @Override
+    protected void onRestoreInstanceState(Parcelable state) {
+        if (state == null || !state.getClass().equals(SavedState.class)) {
+            // Didn't save state for us in onSaveInstanceState
+            super.onRestoreInstanceState(state);
+            return;
+        }
+
+        SavedState myState = (SavedState) state;
+        super.onRestoreInstanceState(myState.getSuperState());
+        mOriginalColors = myState.originalColors;
+        mCurrentColors = myState.currentColors;
+        for (int i = 0; i < mSeekBars.length; i++) {
+            mSeekBars[i].setValueFromString(mCurrentColors[i]);
+        }
+        DisplayColorCalibration.setColors(TextUtils.join(" ", mCurrentColors));
+    }
+
+    public static boolean isSupported() {
+        try {
+            return DisplayColorCalibration.isSupported();
+        } catch (NoClassDefFoundError e) {
+            // Hardware abstraction framework isn't installed
+            return false;
+        }
+    }
+
+    public static void restore(Context context) {
+        if (!isSupported()) {
+            return;
+        }
+
+        final SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
+        final String value = prefs.getString("display_color_calibration", null);
+
+        if (value != null) {
+            DisplayColorCalibration.setColors(value);
+        }
+    }
+
+    private static class SavedState extends BaseSavedState {
+        String originalColors;
+        String[] currentColors;
+
+        public SavedState(Parcelable superState) {
+            super(superState);
+        }
+
+        public SavedState(Parcel source) {
+            super(source);
+            originalColors = source.readString();
+            currentColors = source.createStringArray();
+        }
+
+        @Override
+        public void writeToParcel(Parcel dest, int flags) {
+            super.writeToParcel(dest, flags);
+            dest.writeString(originalColors);
+            dest.writeStringArray(currentColors);
+        }
+
+        public static final Parcelable.Creator<SavedState> CREATOR =
+                new Parcelable.Creator<SavedState>() {
+
+            public SavedState createFromParcel(Parcel in) {
+                return new SavedState(in);
+            }
+
+            public SavedState[] newArray(int size) {
+                return new SavedState[size];
+            }
+        };
+    }
+
+    private class ColorSeekBar implements SeekBar.OnSeekBarChangeListener {
+        private int mIndex;
+        private SeekBar mSeekBar;
+        private TextView mValue;
+
+        public ColorSeekBar(SeekBar seekBar, TextView value, int index) {
+            mSeekBar = seekBar;
+            mValue = value;
+            mIndex = index;
+
+            mSeekBar.setMax(DisplayColorCalibration.getMaxValue() -
+                    DisplayColorCalibration.getMinValue());
+            mSeekBar.setOnSeekBarChangeListener(this);
+        }
+
+        public void setValueFromString(String valueString) {
+            mSeekBar.setProgress(Integer.valueOf(valueString));
+        }
+
+        @Override
+        public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
+            int min = DisplayColorCalibration.getMinValue();
+            int max = DisplayColorCalibration.getMaxValue();
+
+            if (fromUser) {
+                mCurrentColors[mIndex] = String.valueOf(progress + min);
+                DisplayColorCalibration.setColors(TextUtils.join(" ", mCurrentColors));
+            }
+
+            int percent = Math.round(100F * progress / (max - min));
+            mValue.setText(String.format("%d%%", percent));
+        }
+
+        @Override
+        public void onStartTrackingTouch(SeekBar seekBar) {
+            // Do nothing here
+        }
+
+        @Override
+        public void onStopTrackingTouch(SeekBar seekBar) {
+            // Do nothing here
+        }
+    }
+}
diff --git a/src/com/android/settings/hardware/DisplayGamma.java b/src/com/android/settings/hardware/DisplayGamma.java
new file mode 100644
index 0000000..5ce0390
--- /dev/null
+++ b/src/com/android/settings/hardware/DisplayGamma.java
@@ -0,0 +1,341 @@
+/*
+ * Copyright (C) 2013 The CyanogenMod Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.hardware;
+
+import android.app.AlertDialog;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.SharedPreferences;
+import android.content.SharedPreferences.Editor;
+import android.content.res.Resources;
+import android.os.Bundle;
+import android.os.Parcel;
+import android.os.Parcelable;
+import android.preference.DialogPreference;
+import android.preference.PreferenceManager;
+import android.text.TextUtils;
+import android.util.AttributeSet;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.Button;
+import android.widget.SeekBar;
+import android.widget.TextView;
+
+import com.android.settings.R;
+import org.cyanogenmod.hardware.DisplayGammaCalibration;
+
+/**
+ * Special preference type that allows configuration of Gamma settings
+ */
+public class DisplayGamma extends DialogPreference {
+    private static final String TAG = "GammaCalibration";
+
+    private static final int[] BAR_COLORS = new int[] {
+        R.string.color_red_title,
+        R.string.color_green_title,
+        R.string.color_blue_title
+    };
+
+    private GammaSeekBar[][] mSeekBars;
+
+    private String[][] mCurrentColors;
+    private String[] mOriginalColors;
+    private int mNumberOfControls;
+
+    public DisplayGamma(Context context, AttributeSet attrs) {
+        super(context, attrs);
+
+        if (!isSupported()) {
+            return;
+        }
+
+        mNumberOfControls = DisplayGammaCalibration.getNumberOfControls();
+        mSeekBars = new GammaSeekBar[mNumberOfControls][BAR_COLORS.length];
+
+        mOriginalColors = new String[mNumberOfControls];
+        mCurrentColors = new String[mNumberOfControls][];
+
+        setDialogLayoutResource(R.layout.display_gamma_calibration);
+    }
+
+    @Override
+    protected void onPrepareDialogBuilder(AlertDialog.Builder builder) {
+        builder.setNeutralButton(R.string.auto_brightness_reset_button,
+                new DialogInterface.OnClickListener() {
+            @Override
+            public void onClick(DialogInterface dialog, int which) {
+            }
+        });
+    }
+
+    @Override
+    protected void onBindDialogView(View view) {
+        super.onBindDialogView(view);
+
+        final ViewGroup container = (ViewGroup) view.findViewById(R.id.gamma_container);
+        final LayoutInflater inflater = LayoutInflater.from(getContext());
+        final SharedPreferences prefs = getSharedPreferences();
+        final Resources res = container.getResources();
+        final String[] gammaDescriptors = res.getStringArray(R.array.gamma_descriptors);
+
+        // Create multiple sets of seekbars, depending on the
+        // number of controls the device has
+        for (int index = 0; index < mNumberOfControls; index++) {
+            mOriginalColors[index] = DisplayGammaCalibration.getCurGamma(index);
+            mCurrentColors[index] = mOriginalColors[index].split(" ");
+
+            final String defaultKey = "display_gamma_default_" + index;
+            if (!prefs.contains(defaultKey)) {
+                prefs.edit().putString(defaultKey, mOriginalColors[index]).commit();
+            }
+
+            if (mNumberOfControls != 1) {
+                TextView header = (TextView) inflater.inflate(
+                        R.layout.display_gamma_calibration_header, container, false);
+
+                if (index < gammaDescriptors.length) {
+                    header.setText(gammaDescriptors[index]);
+                } else {
+                    header.setText(res.getString(
+                            R.string.gamma_tuning_control_set_header, index + 1));
+                }
+                container.addView(header);
+            }
+
+            for (int color = 0; color < BAR_COLORS.length; color++) {
+                ViewGroup item = (ViewGroup) inflater.inflate(
+                        R.layout.display_gamma_calibration_item, container, false);
+
+                mSeekBars[index][color] = new GammaSeekBar(index, color, item);
+                mSeekBars[index][color].setGamma(Integer.valueOf(mCurrentColors[index][color]));
+                // make sure to add the seekbar group to the container _after_
+                // creating GammaSeekBar, so that GammaSeekBar has a chance to
+                // get the correct subviews without getting confused by duplicate IDs
+                container.addView(item);
+            }
+        }
+    }
+
+    @Override
+    protected void showDialog(Bundle state) {
+        super.showDialog(state);
+
+        // can't use onPrepareDialogBuilder for this as we want the dialog
+        // to be kept open on click
+        AlertDialog d = (AlertDialog) getDialog();
+        Button defaultsButton = d.getButton(DialogInterface.BUTTON_NEUTRAL);
+        defaultsButton.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                for (int index = 0; index < mSeekBars.length; index++) {
+                    final SharedPreferences prefs = getSharedPreferences();
+                    final String defaultKey = "display_gamma_default_" + index;
+                    // this key is guaranteed to be present, as we have
+                    // created it in onBindDialogView()
+                    final String[] defaultColors = prefs.getString(defaultKey, null).split(" ");
+
+                    for (int color = 0; color < BAR_COLORS.length; color++) {
+                        mSeekBars[index][color].setGamma(Integer.valueOf(defaultColors[color]));
+                        mCurrentColors[index][color] = defaultColors[color];
+                    }
+                    DisplayGammaCalibration.setGamma(index,
+                            TextUtils.join(" ", mCurrentColors[index]));
+                }
+            }
+       });
+    }
+
+    @Override
+    protected void onDialogClosed(boolean positiveResult) {
+        super.onDialogClosed(positiveResult);
+
+        if (positiveResult) {
+            Editor editor = getEditor();
+            for (int i = 0; i < mNumberOfControls; i++) {
+                editor.putString("display_gamma_" + i, DisplayGammaCalibration.getCurGamma(i));
+            }
+            editor.commit();
+        } else if (mOriginalColors != null) {
+            for (int i = 0; i < mNumberOfControls; i++) {
+                DisplayGammaCalibration.setGamma(i, mOriginalColors[i]);
+            }
+        }
+    }
+
+    @Override
+    protected Parcelable onSaveInstanceState() {
+        final Parcelable superState = super.onSaveInstanceState();
+        if (getDialog() == null || !getDialog().isShowing()) {
+            return superState;
+        }
+
+        // Save the dialog state
+        final SavedState myState = new SavedState(superState);
+        myState.controlCount = mNumberOfControls;
+        myState.currentColors = mCurrentColors;
+        myState.originalColors = mOriginalColors;
+
+        // Restore the old state when the activity or dialog is being paused
+        for (int i = 0; i < mNumberOfControls; i++) {
+            DisplayGammaCalibration.setGamma(i, mOriginalColors[i]);
+        }
+        mOriginalColors = null;
+
+        return myState;
+    }
+
+    @Override
+    protected void onRestoreInstanceState(Parcelable state) {
+        if (state == null || !state.getClass().equals(SavedState.class)) {
+            // Didn't save state for us in onSaveInstanceState
+            super.onRestoreInstanceState(state);
+            return;
+        }
+
+        SavedState myState = (SavedState) state;
+        super.onRestoreInstanceState(myState.getSuperState());
+        mNumberOfControls = myState.controlCount;
+        mOriginalColors = myState.originalColors;
+        mCurrentColors = myState.currentColors;
+
+        for (int index = 0; index < mNumberOfControls; index++) {
+            for (int color = 0; color < BAR_COLORS.length; color++) {
+                mSeekBars[index][color].setGamma(Integer.valueOf(mCurrentColors[index][color]));
+            }
+            DisplayGammaCalibration.setGamma(index, TextUtils.join(" ", mCurrentColors[index]));
+        }
+    }
+
+    public static boolean isSupported() {
+        try {
+            return DisplayGammaCalibration.isSupported();
+        } catch (NoClassDefFoundError e) {
+            // Hardware abstraction framework isn't installed
+            return false;
+        }
+    }
+
+    public static void restore(Context context) {
+        if (!isSupported()) {
+            return;
+        }
+
+        final SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
+        for (int i = 0; i < DisplayGammaCalibration.getNumberOfControls(); i++) {
+            final String values = prefs.getString("display_gamma_" + i, null);
+            if (values != null) {
+                DisplayGammaCalibration.setGamma(i, values);
+            }
+        }
+    }
+
+    private static class SavedState extends BaseSavedState {
+        int controlCount;
+        String[] originalColors;
+        String[][] currentColors;
+
+        public SavedState(Parcelable superState) {
+            super(superState);
+        }
+
+        public SavedState(Parcel source) {
+            super(source);
+            controlCount = source.readInt();
+            originalColors = source.createStringArray();
+            currentColors = new String[controlCount][];
+            for (int i = 0; i < controlCount; i++) {
+                currentColors[i] = source.createStringArray();
+            }
+        }
+
+        @Override
+        public void writeToParcel(Parcel dest, int flags) {
+            super.writeToParcel(dest, flags);
+            dest.writeInt(controlCount);
+            dest.writeStringArray(originalColors);
+            for (int i = 0; i < controlCount; i++) {
+                dest.writeStringArray(currentColors[i]);
+            }
+        }
+
+        public static final Parcelable.Creator<SavedState> CREATOR =
+                new Parcelable.Creator<SavedState>() {
+
+            public SavedState createFromParcel(Parcel in) {
+                return new SavedState(in);
+            }
+
+            public SavedState[] newArray(int size) {
+                return new SavedState[size];
+            }
+        };
+    }
+
+    private class GammaSeekBar implements SeekBar.OnSeekBarChangeListener {
+        private int mControlIndex;
+        private int mColorIndex;
+        private int mOriginal;
+        private int mMin;
+        private SeekBar mSeekBar;
+        private TextView mValue;
+
+        public GammaSeekBar(int controlIndex, int colorIndex, ViewGroup container) {
+            mControlIndex = controlIndex;
+            mColorIndex = colorIndex;
+
+            mMin = DisplayGammaCalibration.getMinValue(controlIndex);
+
+            mValue = (TextView) container.findViewById(R.id.color_value);
+            mSeekBar = (SeekBar) container.findViewById(R.id.color_seekbar);
+
+            TextView label = (TextView) container.findViewById(R.id.color_text);
+            label.setText(container.getContext().getString(BAR_COLORS[colorIndex]));
+
+            mSeekBar.setMax(DisplayGammaCalibration.getMaxValue(controlIndex) - mMin);
+            mSeekBar.setProgress(0);
+            mValue.setText(String.valueOf(mSeekBar.getProgress() + mMin));
+
+            // this must be done last, we don't want to apply our initial value to the hardware
+            mSeekBar.setOnSeekBarChangeListener(this);
+        }
+
+        public void setGamma(int gamma) {
+            mSeekBar.setProgress(gamma - mMin);
+        }
+
+        @Override
+        public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
+            if (fromUser) {
+                mCurrentColors[mControlIndex][mColorIndex] = String.valueOf(progress + mMin);
+                DisplayGammaCalibration.setGamma(mControlIndex,
+                        TextUtils.join(" ", mCurrentColors[mControlIndex]));
+            }
+            mValue.setText(String.valueOf(progress + mMin));
+        }
+
+        @Override
+        public void onStartTrackingTouch(SeekBar seekBar) {
+            // Do nothing
+        }
+
+        @Override
+        public void onStopTrackingTouch(SeekBar seekBar) {
+            // Do nothing
+        }
+    }
+}
diff --git a/src/com/android/settings/hardware/VibratorIntensity.java b/src/com/android/settings/hardware/VibratorIntensity.java
new file mode 100644
index 0000000..346caa4
--- /dev/null
+++ b/src/com/android/settings/hardware/VibratorIntensity.java
@@ -0,0 +1,216 @@
+/*
+ * Copyright (C) 2013 The CyanogenMod Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.hardware;
+
+import android.app.AlertDialog;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.SharedPreferences;
+import android.content.SharedPreferences.Editor;
+import android.graphics.Color;
+import android.graphics.LightingColorFilter;
+import android.graphics.drawable.Drawable;
+import android.graphics.drawable.LayerDrawable;
+import android.os.Bundle;
+import android.os.Vibrator;
+import android.preference.DialogPreference;
+import android.preference.PreferenceManager;
+import android.util.AttributeSet;
+import android.util.Log;
+import android.view.View;
+import android.widget.SeekBar;
+import android.widget.TextView;
+import android.widget.Button;
+
+import com.android.settings.R;
+import org.cyanogenmod.hardware.VibratorHW;
+
+public class VibratorIntensity extends DialogPreference implements
+        SeekBar.OnSeekBarChangeListener {
+    private static final String PREF_NAME = "vibrator_intensity";
+    private SeekBar mSeekBar;
+    private TextView mValue;
+    private TextView mWarning;
+    private int mOriginalValue;
+
+    private Drawable mProgressDrawable;
+    private Drawable mProgressThumb;
+    private LightingColorFilter mRedFilter;
+
+    public VibratorIntensity(Context context, AttributeSet attrs) {
+        super(context, attrs);
+
+        if (!isSupported()) {
+            return;
+        }
+
+        setDialogLayoutResource(R.layout.vibrator_intensity);
+    }
+
+    @Override
+    protected void onPrepareDialogBuilder(AlertDialog.Builder builder) {
+        builder.setNeutralButton(R.string.auto_brightness_reset_button,
+                new DialogInterface.OnClickListener() {
+            @Override
+            public void onClick(DialogInterface dialog, int which) {
+            }
+        });
+    }
+
+    @Override
+    protected void onBindDialogView(View view) {
+        super.onBindDialogView(view);
+
+        mSeekBar = (SeekBar) view.findViewById(com.android.internal.R.id.seekbar);
+        mValue = (TextView) view.findViewById(R.id.value);
+        mWarning = (TextView) view.findViewById(R.id.warning_text);
+
+        int warningThreshold = VibratorHW.getWarningThreshold();
+        if (warningThreshold > 0) {
+            String message = getContext().getResources().getString(
+                    R.string.vibrator_warning, intensityToPercent(warningThreshold));
+            mWarning.setText(message);
+        } else if (mWarning != null) {
+            mWarning.setVisibility(View.GONE);
+        }
+
+        Drawable progressDrawable = mSeekBar.getProgressDrawable();
+        if (progressDrawable instanceof LayerDrawable) {
+            LayerDrawable ld = (LayerDrawable) progressDrawable;
+            mProgressDrawable = ld.findDrawableByLayerId(android.R.id.progress);
+        }
+        mProgressThumb = mSeekBar.getThumb();
+        mRedFilter = new LightingColorFilter(Color.BLACK,
+                getContext().getResources().getColor(android.R.color.holo_red_light));
+
+        // Read the current value in case user wants to dismiss his changes
+        mOriginalValue = VibratorHW.getCurIntensity();
+
+        // Restore percent value from SharedPreferences object
+        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(getContext());
+        int defaultValue = intensityToPercent(VibratorHW.getDefaultIntensity());
+        int percent = prefs.getInt(PREF_NAME, defaultValue);
+
+        mSeekBar.setOnSeekBarChangeListener(this);
+        mSeekBar.setProgress(percent);
+    }
+
+    @Override
+    protected void showDialog(Bundle state) {
+        super.showDialog(state);
+
+        // Can't use onPrepareDialogBuilder for this as we want the dialog
+        // to be kept open on click
+        AlertDialog d = (AlertDialog) getDialog();
+        Button defaultsButton = d.getButton(DialogInterface.BUTTON_NEUTRAL);
+        defaultsButton.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                mSeekBar.setProgress(intensityToPercent(VibratorHW.getDefaultIntensity()));
+            }
+        });
+    }
+
+    @Override
+    protected void onDialogClosed(boolean positiveResult) {
+        super.onDialogClosed(positiveResult);
+
+        if (positiveResult) {
+            // Store percent value in SharedPreferences object
+            SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(getContext());
+            prefs.edit().putInt(PREF_NAME, mSeekBar.getProgress()).commit();
+        } else {
+            VibratorHW.setIntensity(mOriginalValue);
+        }
+    }
+
+    public static boolean isSupported() {
+        try {
+            return VibratorHW.isSupported();
+        } catch (NoClassDefFoundError e) {
+            // Hardware abstraction framework isn't installed
+            return false;
+        }
+    }
+
+    public static void restore(Context context) {
+        if (!isSupported()) {
+            return;
+        }
+        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
+        int defaultValue = intensityToPercent(VibratorHW.getDefaultIntensity());
+        int percent = prefs.getInt(PREF_NAME, defaultValue);
+
+        VibratorHW.setIntensity(percentToIntensity(percent));
+    }
+
+    @Override
+    public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
+        int warningThreshold = VibratorHW.getWarningThreshold();
+        boolean shouldWarn =
+                warningThreshold > 0 && progress >= intensityToPercent(warningThreshold);
+
+        if (mProgressDrawable != null) {
+            mProgressDrawable.setColorFilter(shouldWarn ? mRedFilter : null);
+        }
+        if (mProgressThumb != null) {
+            mProgressThumb.setColorFilter(shouldWarn ? mRedFilter : null);
+        }
+
+        VibratorHW.setIntensity(percentToIntensity(progress));
+        mValue.setText(String.format("%d%%", progress));
+    }
+
+    @Override
+    public void onStartTrackingTouch(SeekBar seekBar) {
+        // Do nothing here
+    }
+
+    @Override
+    public void onStopTrackingTouch(SeekBar seekBar) {
+        Vibrator vib = (Vibrator) getContext().getSystemService(Context.VIBRATOR_SERVICE);
+        vib.vibrate(200);
+    }
+
+    private static int intensityToPercent(int value) {
+        double maxValue = VibratorHW.getMaxIntensity();
+        double minValue = VibratorHW.getMinIntensity();
+        double percent = (value - minValue) * (100 / (maxValue - minValue));
+
+        if (percent > 100) {
+            percent = 100;
+        } else if (percent < 0) {
+            percent = 0;
+        }
+
+        return (int) percent;
+    }
+
+    private static int percentToIntensity(int percent) {
+        int maxValue = VibratorHW.getMaxIntensity();
+        int minValue = VibratorHW.getMinIntensity();
+        int value = Math.round((((maxValue - minValue) * percent) / 100) + minValue);
+
+        if (value > maxValue) {
+            value = maxValue;
+        } else if (value < minValue) {
+            value = minValue;
+        }
+
+        return value;
+    }
+}