/*
* 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 com.google.samples.apps.topeka.widget.fab;
import android.content.Context;
import android.support.design.widget.FloatingActionButton;
import android.util.AttributeSet;
import android.widget.Checkable;
import com.google.samples.apps.topeka.R;
/**
* A {@link FloatingActionButton} that implements {@link Checkable} to allow display of different
* icons in it's states.
*/
public class CheckableFab extends FloatingActionButton implements Checkable {
private static final int[] CHECKED = {android.R.attr.state_checked};
private boolean mIsChecked = true;
public CheckableFab(Context context) {
this(context, null);
}
public CheckableFab(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public CheckableFab(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
setImageResource(R.drawable.answer_quiz_fab);
}
@Override
public int[] onCreateDrawableState(int extraSpace) {
final int[] drawableState = super.onCreateDrawableState(++extraSpace);
if (mIsChecked) {
mergeDrawableStates(drawableState, CHECKED);
}
return drawableState;
}
@Override
public void setChecked(boolean checked) {
if (mIsChecked == checked) {
return;
}
mIsChecked = checked;
refreshDrawableState();
}
@Override
public boolean isChecked() {
return mIsChecked;
}
@Override
public void toggle() {
setChecked(!mIsChecked);
}
}