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/*
* Copyright (C) 2017 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.dialershared.bubble;
import android.content.Context;
import android.support.v4.view.AccessibilityDelegateCompat;
import android.support.v4.view.ViewCompat;
import android.support.v4.view.accessibility.AccessibilityEventCompat;
import android.support.v4.view.accessibility.AccessibilityNodeInfoCompat;
import android.support.v7.widget.AppCompatImageButton;
import android.util.AttributeSet;
import android.view.View;
import android.view.accessibility.AccessibilityEvent;
import android.widget.Checkable;
/**
* An {@link android.widget.ImageButton ImageButton} that implements {@link Checkable} and
* propagates the checkable state
*/
public class CheckableImageButton extends AppCompatImageButton implements Checkable {
// Copied without modification from AppCompat library
private static final int[] DRAWABLE_STATE_CHECKED = new int[] {android.R.attr.state_checked};
private boolean mChecked;
public CheckableImageButton(Context context) {
this(context, null);
}
public CheckableImageButton(Context context, AttributeSet attrs) {
this(context, attrs, android.R.attr.imageButtonStyle);
}
public CheckableImageButton(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
ViewCompat.setAccessibilityDelegate(
this,
new AccessibilityDelegateCompat() {
@Override
public void onInitializeAccessibilityEvent(View host, AccessibilityEvent event) {
super.onInitializeAccessibilityEvent(host, event);
event.setChecked(isChecked());
}
@Override
public void onInitializeAccessibilityNodeInfo(
View host, AccessibilityNodeInfoCompat info) {
super.onInitializeAccessibilityNodeInfo(host, info);
info.setCheckable(true);
info.setChecked(isChecked());
}
});
}
@Override
public void setChecked(boolean checked) {
if (mChecked != checked) {
mChecked = checked;
refreshDrawableState();
sendAccessibilityEvent(AccessibilityEventCompat.TYPE_WINDOW_CONTENT_CHANGED);
}
}
@Override
public boolean isChecked() {
return mChecked;
}
@Override
public void toggle() {
setChecked(!mChecked);
}
@Override
public int[] onCreateDrawableState(int extraSpace) {
if (mChecked) {
return mergeDrawableStates(
super.onCreateDrawableState(extraSpace + DRAWABLE_STATE_CHECKED.length),
DRAWABLE_STATE_CHECKED);
} else {
return super.onCreateDrawableState(extraSpace);
}
}
}
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