1 /* 2 * Copyright (C) 2016 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 17 package com.android.dialer.callcomposer.camera.camerafocus; 18 19 import android.content.Context; 20 import android.graphics.Canvas; 21 import android.view.MotionEvent; 22 23 /** Abstract class that all Camera overlays should implement. */ 24 public abstract class OverlayRenderer implements RenderOverlay.Renderer { 25 26 protected RenderOverlay overlay; 27 28 private int left; 29 private int top; 30 private int right; 31 private int bottom; 32 private boolean visible; 33 setVisible(boolean vis)34 public void setVisible(boolean vis) { 35 visible = vis; 36 update(); 37 } 38 isVisible()39 public boolean isVisible() { 40 return visible; 41 } 42 43 // default does not handle touch 44 @Override handlesTouch()45 public boolean handlesTouch() { 46 return false; 47 } 48 49 @Override onTouchEvent(MotionEvent evt)50 public boolean onTouchEvent(MotionEvent evt) { 51 return false; 52 } 53 onDraw(Canvas canvas)54 public abstract void onDraw(Canvas canvas); 55 56 @Override draw(Canvas canvas)57 public void draw(Canvas canvas) { 58 if (visible) { 59 onDraw(canvas); 60 } 61 } 62 63 @Override setOverlay(RenderOverlay overlay)64 public void setOverlay(RenderOverlay overlay) { 65 this.overlay = overlay; 66 } 67 68 @Override layout(int left, int top, int right, int bottom)69 public void layout(int left, int top, int right, int bottom) { 70 this.left = left; 71 this.right = right; 72 this.top = top; 73 this.bottom = bottom; 74 } 75 getContext()76 protected Context getContext() { 77 if (overlay != null) { 78 return overlay.getContext(); 79 } else { 80 return null; 81 } 82 } 83 getWidth()84 public int getWidth() { 85 return right - left; 86 } 87 getHeight()88 public int getHeight() { 89 return bottom - top; 90 } 91 update()92 protected void update() { 93 if (overlay != null) { 94 overlay.update(); 95 } 96 } 97 } 98