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/*
* Copyright (C) 2011 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.browser.preferences;
import com.android.browser.R;
import android.content.Context;
import android.os.Parcel;
import android.os.Parcelable;
import android.preference.Preference;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;
public class MinFontSizePreference extends Preference implements OnSeekBarChangeListener {
// range from 1:6..24
static final int MIN = 5;
static final int MAX = 23;
private int mProgress;
View mRoot;
public MinFontSizePreference(
Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
public MinFontSizePreference(Context context, AttributeSet attrs) {
super(context, attrs);
}
public MinFontSizePreference(Context context) {
super(context);
}
@Override
public View getView(View convertView, ViewGroup parent) {
if (mRoot == null) {
LayoutInflater inflater = LayoutInflater.from(getContext());
mRoot = inflater.inflate(R.layout.min_font_size, parent, false);
SeekBar seek = (SeekBar) mRoot.findViewById(R.id.seekbar);
seek.setMax((MAX - MIN));
seek.setProgress(mProgress);
seek.setOnSeekBarChangeListener(this);
}
return mRoot;
}
@Override
protected void onSetInitialValue(boolean restoreValue, Object defaultValue) {
mProgress = restoreValue ? getPersistedInt(mProgress)
: (Integer) defaultValue;
mProgress -= 1;
}
@Override
public void onProgressChanged(
SeekBar seekBar, int progress, boolean fromUser) {
if (fromUser) {
if (progress == 0) {
persistInt(1);
} else {
persistInt(progress + MIN + 1);
}
}
mRoot.invalidate();
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
@Override
protected Parcelable onSaveInstanceState() {
/*
* Suppose a client uses this preference type without persisting. We
* must save the instance state so it is able to, for example, survive
* orientation changes.
*/
final Parcelable superState = super.onSaveInstanceState();
if (isPersistent()) {
// No need to save instance state since it's persistent
return superState;
}
// Save the instance state
final SavedState myState = new SavedState(superState);
myState.progress = mProgress;
return myState;
}
@Override
protected void onRestoreInstanceState(Parcelable state) {
if (!state.getClass().equals(SavedState.class)) {
// Didn't save state for us in onSaveInstanceState
super.onRestoreInstanceState(state);
return;
}
// Restore the instance state
SavedState myState = (SavedState) state;
super.onRestoreInstanceState(myState.getSuperState());
mProgress = myState.progress;
notifyChanged();
}
/**
* SavedState, a subclass of {@link BaseSavedState}, will store the state
* of MyPreference, a subclass of Preference.
* <p>
* It is important to always call through to super methods.
*/
private static class SavedState extends BaseSavedState {
int progress;
public SavedState(Parcel source) {
super(source);
// Restore the click counter
progress = source.readInt();
}
@Override
public void writeToParcel(Parcel dest, int flags) {
super.writeToParcel(dest, flags);
// Save the click counter
dest.writeInt(progress);
}
public SavedState(Parcelable superState) {
super(superState);
}
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];
}
};
}
}
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