1 /* 2 * Copyright (C) 2013 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package com.android.camera; 17 18 import android.content.Context; 19 import android.content.res.TypedArray; 20 import android.util.AttributeSet; 21 import android.view.View; 22 23 /* 24 * A toggle button that supports two states with images rendererd on top for each state. 25 */ 26 public class ToggleImageButton extends MultiToggleImageButton { 27 /* 28 * Listener interface for button state changes. 29 */ 30 public interface OnStateChangeListener { 31 /* 32 * @param view the ToggleImageButton that received the touch event 33 * @param state the new state the button is in 34 */ stateChanged(View view, boolean state)35 public abstract void stateChanged(View view, boolean state); 36 } 37 38 private OnStateChangeListener mOnStateChangeListener; ToggleImageButton(Context context)39 public ToggleImageButton(Context context) { 40 super(context); 41 } 42 ToggleImageButton(Context context, AttributeSet attrs)43 public ToggleImageButton(Context context, AttributeSet attrs) { 44 super(context, attrs); 45 } 46 ToggleImageButton(Context context, AttributeSet attrs, int defStyle)47 public ToggleImageButton(Context context, AttributeSet attrs, int defStyle) { 48 super(context, attrs, defStyle); 49 } 50 51 /* 52 * Set the state change listener. 53 * @param onStateChangeListener the listener to set 54 */ setOnStateChangeListener(OnStateChangeListener onStateChangeListener)55 public void setOnStateChangeListener(OnStateChangeListener onStateChangeListener) { 56 mOnStateChangeListener = onStateChangeListener; 57 } 58 59 /* 60 * Set the current button state, thus causing the state change listener to get called. 61 * @param state the desired state 62 */ setState(boolean state)63 public void setState(boolean state) { 64 super.setState(state ? 1 : 0); 65 } 66 67 @Override init()68 protected void init() { 69 super.init(); 70 super.setOnStateChangeListener(new MultiToggleImageButton.OnStateChangeListener() { 71 @Override 72 public void stateChanged(View v, int state) { 73 if (mOnStateChangeListener != null) { 74 mOnStateChangeListener.stateChanged(v, (state == 1)); 75 } 76 } 77 }); 78 } 79 }