/*
* Copyright 2015 Google Inc.
*
* 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 io.plaidapp.ui.widget;
import android.content.Context;
import android.util.AttributeSet;
import android.view.SoundEffectConstants;
import android.widget.Checkable;
import android.widget.ImageButton;
/**
* An extension to {@link ImageButton} which implements the {@link Checkable} interface.
*/
public class CheckableImageButton extends ImageButton implements Checkable {
private static final int[] CHECKED_STATE_SET = {android.R.attr.state_checked};
private boolean isChecked = false;
public CheckableImageButton(Context context, AttributeSet attrs) {
super(context, attrs);
}
public boolean isChecked() {
return isChecked;
}
public void setChecked(boolean isChecked) {
if (this.isChecked != isChecked) {
this.isChecked = isChecked;
refreshDrawableState();
}
}
public void toggle() {
setChecked(!isChecked);
}
@Override // borrowed from CompoundButton#performClick()
public boolean performClick() {
toggle();
final boolean handled = super.performClick();
if (!handled) {
// View only makes a sound effect if the onClickListener was
// called, so we'll need to make one here instead.
playSoundEffect(SoundEffectConstants.CLICK);
}
return handled;
}
@Override
public int[] onCreateDrawableState(int extraSpace) {
final int[] drawableState = super.onCreateDrawableState(extraSpace + 1);
if (isChecked()) {
mergeDrawableStates(drawableState, CHECKED_STATE_SET);
}
return drawableState;
}
}