forked from thunderbird/thunderbird-android
/
SliderPreference.java
194 lines (168 loc) · 6.21 KB
/
SliderPreference.java
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/*
* Copyright 2012 Jay Weisskopf
*
* Licensed under the MIT License (see LICENSE.txt)
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all copies
* or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
* PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
* FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* Source: https://github.com/jayschwa/AndroidSliderPreference
*/
package com.fsck.k9.activity.setup;
import android.content.Context;
import android.content.res.TypedArray;
import android.os.Bundle;
import android.os.Parcelable;
import android.preference.DialogPreference;
import android.support.annotation.ArrayRes;
import android.util.AttributeSet;
import android.view.View;
import android.widget.SeekBar;
import com.fsck.k9.*;
/**
* @author Jay Weisskopf
*/
public class SliderPreference extends DialogPreference {
private static final String STATE_KEY_SUPER = "super";
private static final String STATE_KEY_SEEK_BAR_VALUE = "seek_bar_value";
protected final static int SEEKBAR_RESOLUTION = 10000;
protected float mValue;
protected int mSeekBarValue;
protected CharSequence[] mSummaries;
/**
* @param context
* @param attrs
*/
public SliderPreference(Context context, AttributeSet attrs) {
super(context, attrs);
setup(context, attrs);
}
/**
* @param context
* @param attrs
* @param defStyle
*/
public SliderPreference(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
setup(context, attrs);
}
private void setup(Context context, AttributeSet attrs) {
setDialogLayoutResource(R.layout.slider_preference_dialog);
TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.SliderPreference);
try {
setSummary(a.getTextArray(R.styleable.SliderPreference_android_summary));
} catch (Exception e) {
// Do nothing
}
a.recycle();
}
@Override
protected Object onGetDefaultValue(TypedArray a, int index) {
return a.getFloat(index, 0);
}
@Override
protected void onSetInitialValue(boolean restoreValue, Object defaultValue) {
setValue(restoreValue ? getPersistedFloat(mValue) : (Float) defaultValue);
}
@Override
public CharSequence getSummary() {
if (mSummaries != null && mSummaries.length > 0) {
int index = (int) (mValue * mSummaries.length);
index = Math.min(index, mSummaries.length - 1);
return mSummaries[index];
} else {
return super.getSummary();
}
}
public void setSummary(CharSequence[] summaries) {
mSummaries = summaries;
}
@Override
public void setSummary(CharSequence summary) {
super.setSummary(summary);
mSummaries = null;
}
@Override
public void setSummary(@ArrayRes int summaryResId) {
try {
setSummary(getContext().getResources().getStringArray(summaryResId));
} catch (Exception e) {
super.setSummary(summaryResId);
}
}
public float getValue() {
return mValue;
}
public void setValue(float value) {
value = Math.max(0, Math.min(value, 1)); // clamp to [0, 1]
if (shouldPersist()) {
persistFloat(value);
}
if (value != mValue) {
mValue = value;
notifyChanged();
}
}
@Override
protected View onCreateDialogView() {
mSeekBarValue = (int) (mValue * SEEKBAR_RESOLUTION);
View view = super.onCreateDialogView();
SeekBar seekbar = (SeekBar) view.findViewById(R.id.slider_preference_seekbar);
seekbar.setMax(SEEKBAR_RESOLUTION);
seekbar.setProgress(mSeekBarValue);
seekbar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
if (fromUser) {
SliderPreference.this.mSeekBarValue = progress;
callChangeListener((float) SliderPreference.this.mSeekBarValue / SEEKBAR_RESOLUTION);
}
}
});
return view;
}
@Override
protected void onDialogClosed(boolean positiveResult) {
final float newValue = (float) mSeekBarValue / SEEKBAR_RESOLUTION;
if (positiveResult && callChangeListener(newValue)) {
setValue(newValue);
} else {
callChangeListener(mValue);
}
super.onDialogClosed(positiveResult);
}
@Override
protected Parcelable onSaveInstanceState() {
Parcelable superState = super.onSaveInstanceState();
Bundle state = new Bundle();
state.putParcelable(STATE_KEY_SUPER, superState);
state.putInt(STATE_KEY_SEEK_BAR_VALUE, mSeekBarValue);
return state;
}
@Override
protected void onRestoreInstanceState(Parcelable state) {
Bundle bundle = (Bundle) state;
super.onRestoreInstanceState(bundle.getParcelable(STATE_KEY_SUPER));
mSeekBarValue = bundle.getInt(STATE_KEY_SEEK_BAR_VALUE);
callChangeListener((float) mSeekBarValue / SEEKBAR_RESOLUTION);
}
}