1 /* 2 * Copyright (C) 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except 5 * in compliance with the License. You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software distributed under the License 10 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express 11 * or implied. See the License for the specific language governing permissions and limitations under 12 * the License. 13 */ 14 package android.support.v17.leanback.widget; 15 16 import android.content.Context; 17 import android.util.AttributeSet; 18 import android.widget.Checkable; 19 import android.widget.ImageView; 20 21 /** 22 * ImageView that supports Checkable states. 23 */ 24 class CheckableImageView extends ImageView implements Checkable { 25 26 private boolean mChecked; 27 28 private static final int[] CHECKED_STATE_SET = { android.R.attr.state_checked }; 29 CheckableImageView(Context context)30 public CheckableImageView(Context context) { 31 this(context, null); 32 } 33 CheckableImageView(Context context, AttributeSet attrs)34 public CheckableImageView(Context context, AttributeSet attrs) { 35 this(context, attrs, 0); 36 } 37 CheckableImageView(Context context, AttributeSet attrs, int defStyleAttr)38 public CheckableImageView(Context context, AttributeSet attrs, int defStyleAttr) { 39 super(context, attrs, defStyleAttr); 40 } 41 42 @Override onCreateDrawableState(final int extraSpace)43 public int[] onCreateDrawableState(final int extraSpace) { 44 final int[] drawableState = super.onCreateDrawableState(extraSpace + 1); 45 if (isChecked()) { 46 mergeDrawableStates(drawableState, CHECKED_STATE_SET); 47 } 48 return drawableState; 49 } 50 51 @Override toggle()52 public void toggle() { 53 setChecked(!mChecked); 54 } 55 56 @Override isChecked()57 public boolean isChecked() { 58 return mChecked; 59 } 60 61 @Override setChecked(final boolean checked)62 public void setChecked(final boolean checked) { 63 if (mChecked != checked) { 64 mChecked = checked; 65 refreshDrawableState(); 66 } 67 } 68 69 } 70