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/*
* Copyright (C) 2013 The Android Open Source 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.inputmethod.latin.settings;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.res.TypedArray;
import android.preference.DialogPreference;
import android.util.AttributeSet;
import android.view.View;
import android.widget.SeekBar;
import android.widget.TextView;
import com.android.inputmethod.latin.R;
public final class SeekBarDialogPreference extends DialogPreference
implements SeekBar.OnSeekBarChangeListener {
public interface ValueProxy {
public int readValue(final String key);
public int readDefaultValue(final String key);
public void writeValue(final int value, final String key);
public void writeDefaultValue(final String key);
public String getValueText(final int value);
public void feedbackValue(final int value);
}
private final int mMaxValue;
private final int mMinValue;
private final int mStepValue;
private TextView mValueView;
private SeekBar mSeekBar;
private ValueProxy mValueProxy;
public SeekBarDialogPreference(final Context context, final AttributeSet attrs) {
super(context, attrs);
final TypedArray a = context.obtainStyledAttributes(
attrs, R.styleable.SeekBarDialogPreference, 0, 0);
mMaxValue = a.getInt(R.styleable.SeekBarDialogPreference_maxValue, 0);
mMinValue = a.getInt(R.styleable.SeekBarDialogPreference_minValue, 0);
mStepValue = a.getInt(R.styleable.SeekBarDialogPreference_stepValue, 0);
a.recycle();
setDialogLayoutResource(R.layout.seek_bar_dialog);
}
public void setInterface(final ValueProxy proxy) {
mValueProxy = proxy;
final int value = mValueProxy.readValue(getKey());
setSummary(mValueProxy.getValueText(value));
}
@Override
protected View onCreateDialogView() {
final View view = super.onCreateDialogView();
mSeekBar = (SeekBar)view.findViewById(R.id.seek_bar_dialog_bar);
mSeekBar.setMax(mMaxValue - mMinValue);
mSeekBar.setOnSeekBarChangeListener(this);
mValueView = (TextView)view.findViewById(R.id.seek_bar_dialog_value);
return view;
}
private int getProgressFromValue(final int value) {
return value - mMinValue;
}
private int getValueFromProgress(final int progress) {
return progress + mMinValue;
}
private int clipValue(final int value) {
final int clippedValue = Math.min(mMaxValue, Math.max(mMinValue, value));
if (mStepValue <= 1) {
return clippedValue;
}
return clippedValue - (clippedValue % mStepValue);
}
private int getClippedValueFromProgress(final int progress) {
return clipValue(getValueFromProgress(progress));
}
@Override
protected void onBindDialogView(final View view) {
final int value = mValueProxy.readValue(getKey());
mValueView.setText(mValueProxy.getValueText(value));
mSeekBar.setProgress(getProgressFromValue(clipValue(value)));
}
@Override
protected void onPrepareDialogBuilder(final AlertDialog.Builder builder) {
builder.setPositiveButton(android.R.string.ok, this)
.setNegativeButton(android.R.string.cancel, this)
.setNeutralButton(R.string.button_default, this);
}
@Override
public void onClick(final DialogInterface dialog, final int which) {
super.onClick(dialog, which);
final String key = getKey();
if (which == DialogInterface.BUTTON_NEUTRAL) {
final int value = mValueProxy.readDefaultValue(key);
setSummary(mValueProxy.getValueText(value));
mValueProxy.writeDefaultValue(key);
return;
}
if (which == DialogInterface.BUTTON_POSITIVE) {
final int value = getClippedValueFromProgress(mSeekBar.getProgress());
setSummary(mValueProxy.getValueText(value));
mValueProxy.writeValue(value, key);
return;
}
}
@Override
public void onProgressChanged(final SeekBar seekBar, final int progress,
final boolean fromUser) {
final int value = getClippedValueFromProgress(progress);
mValueView.setText(mValueProxy.getValueText(value));
if (!fromUser) {
mSeekBar.setProgress(getProgressFromValue(value));
}
}
@Override
public void onStartTrackingTouch(final SeekBar seekBar) {}
@Override
public void onStopTrackingTouch(final SeekBar seekBar) {
mValueProxy.feedbackValue(getClippedValueFromProgress(seekBar.getProgress()));
}
}
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