1/* 2 * Copyright (C) 2015 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 17package com.android.messaging.ui.mediapicker.camerafocus; 18 19import android.content.Context; 20import android.graphics.Canvas; 21import android.util.AttributeSet; 22import android.view.MotionEvent; 23import android.view.View; 24import android.widget.FrameLayout; 25 26import java.util.ArrayList; 27import java.util.List; 28 29public class RenderOverlay extends FrameLayout { 30 31 interface Renderer { 32 33 public boolean handlesTouch(); 34 public boolean onTouchEvent(MotionEvent evt); 35 public void setOverlay(RenderOverlay overlay); 36 public void layout(int left, int top, int right, int bottom); 37 public void draw(Canvas canvas); 38 39 } 40 41 private RenderView mRenderView; 42 private List<Renderer> mClients; 43 44 // reverse list of touch clients 45 private List<Renderer> mTouchClients; 46 private int[] mPosition = new int[2]; 47 48 public RenderOverlay(Context context, AttributeSet attrs) { 49 super(context, attrs); 50 mRenderView = new RenderView(context); 51 addView(mRenderView, new LayoutParams(LayoutParams.MATCH_PARENT, 52 LayoutParams.MATCH_PARENT)); 53 mClients = new ArrayList<Renderer>(10); 54 mTouchClients = new ArrayList<Renderer>(10); 55 setWillNotDraw(false); 56 57 addRenderer(new PieRenderer(context)); 58 } 59 60 public PieRenderer getPieRenderer() { 61 for (Renderer renderer : mClients) { 62 if (renderer instanceof PieRenderer) { 63 return (PieRenderer) renderer; 64 } 65 } 66 return null; 67 } 68 69 public void addRenderer(Renderer renderer) { 70 mClients.add(renderer); 71 renderer.setOverlay(this); 72 if (renderer.handlesTouch()) { 73 mTouchClients.add(0, renderer); 74 } 75 renderer.layout(getLeft(), getTop(), getRight(), getBottom()); 76 } 77 78 public void addRenderer(int pos, Renderer renderer) { 79 mClients.add(pos, renderer); 80 renderer.setOverlay(this); 81 renderer.layout(getLeft(), getTop(), getRight(), getBottom()); 82 } 83 84 public void remove(Renderer renderer) { 85 mClients.remove(renderer); 86 renderer.setOverlay(null); 87 } 88 89 public int getClientSize() { 90 return mClients.size(); 91 } 92 93 @Override 94 public boolean dispatchTouchEvent(MotionEvent m) { 95 return false; 96 } 97 98 public boolean directDispatchTouch(MotionEvent m, Renderer target) { 99 mRenderView.setTouchTarget(target); 100 boolean res = super.dispatchTouchEvent(m); 101 mRenderView.setTouchTarget(null); 102 return res; 103 } 104 105 private void adjustPosition() { 106 getLocationInWindow(mPosition); 107 } 108 109 public int getWindowPositionX() { 110 return mPosition[0]; 111 } 112 113 public int getWindowPositionY() { 114 return mPosition[1]; 115 } 116 117 public void update() { 118 mRenderView.invalidate(); 119 } 120 121 private class RenderView extends View { 122 123 private Renderer mTouchTarget; 124 125 public RenderView(Context context) { 126 super(context); 127 setWillNotDraw(false); 128 } 129 130 public void setTouchTarget(Renderer target) { 131 mTouchTarget = target; 132 } 133 134 @Override 135 public boolean onTouchEvent(MotionEvent evt) { 136 if (mTouchTarget != null) { 137 return mTouchTarget.onTouchEvent(evt); 138 } 139 if (mTouchClients != null) { 140 boolean res = false; 141 for (Renderer client : mTouchClients) { 142 res |= client.onTouchEvent(evt); 143 } 144 return res; 145 } 146 return false; 147 } 148 149 @Override 150 public void onLayout(boolean changed, int left, int top, int right, int bottom) { 151 adjustPosition(); 152 super.onLayout(changed, left, top, right, bottom); 153 if (mClients == null) { 154 return; 155 } 156 for (Renderer renderer : mClients) { 157 renderer.layout(left, top, right, bottom); 158 } 159 } 160 161 @Override 162 public void draw(Canvas canvas) { 163 super.draw(canvas); 164 if (mClients == null) { 165 return; 166 } 167 boolean redraw = false; 168 for (Renderer renderer : mClients) { 169 renderer.draw(canvas); 170 redraw = redraw || ((OverlayRenderer) renderer).isVisible(); 171 } 172 if (redraw) { 173 invalidate(); 174 } 175 } 176 } 177 178}