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/*
* Copyright (C) 2009 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.camera;
import android.content.Context;
import android.content.SharedPreferences;
import android.content.res.TypedArray;
import android.util.AttributeSet;
/**
* A type of <code>CameraPreference</code> whose number of possible values
* is limited.
*/
public class ListPreference extends CameraPreference {
private String mKey;
private String mValue;
private String mDefaultValue;
private CharSequence[] mEntries;
private CharSequence[] mEntryValues;
private boolean mLoaded = false;
public ListPreference(Context context, AttributeSet attrs) {
super(context, attrs);
TypedArray a = context.obtainStyledAttributes(
attrs, R.styleable.ListPreference, 0, 0);
mKey = Util.checkNotNull(
a.getString(R.styleable.ListPreference_key));
mDefaultValue = a.getString(R.styleable.ListPreference_defaultValue);
setEntries(a.getTextArray(R.styleable.ListPreference_entries));
setEntryValues(a.getTextArray(
R.styleable.ListPreference_entryValues));
a.recycle();
}
public String getKey() {
return mKey;
}
public CharSequence[] getEntries() {
return mEntries;
}
public CharSequence[] getEntryValues() {
return mEntryValues;
}
public void setEntries(CharSequence entries[]) {
mEntries = Util.checkNotNull(entries);
}
public void setEntryValues(CharSequence values[]) {
mEntryValues = Util.checkNotNull(values);
}
public String getValue() {
if (!mLoaded) {
mValue = getSharedPreferences().getString(mKey, mDefaultValue);
mLoaded = true;
}
return mValue;
}
public void setValue(String value) {
if (findIndexOfValue(value) < 0) throw new IllegalArgumentException();
mValue = value;
persistStringValue(value);
}
public void setValueIndex(int index) {
setValue(mEntryValues[index].toString());
}
public int findIndexOfValue(String value) {
for (int i = 0, n = mEntryValues.length; i < n; ++i) {
if (Util.equals(mEntryValues[i], value)) return i;
}
return -1;
}
public String getEntry() {
return mEntries[findIndexOfValue(getValue())].toString();
}
protected void persistStringValue(String value) {
SharedPreferences.Editor editor = getSharedPreferences().edit();
editor.putString(mKey, value);
editor.commit();
}
@Override
public void reloadValue() {
this.mLoaded = false;
}
}
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