1 /* 2 * Copyright (C) 2010 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.camera.ui; 18 19 import android.content.Context; 20 import android.graphics.Matrix; 21 import android.util.AttributeSet; 22 import android.view.View; 23 import android.view.ViewGroup; 24 25 // A RotateLayout is designed to display a single item and provides the 26 // capabilities to rotate the item. 27 public class RotateLayout extends ViewGroup implements Rotatable { 28 @SuppressWarnings("unused") 29 private static final String TAG = "RotateLayout"; 30 private int mOrientation; 31 private Matrix mMatrix = new Matrix(); 32 protected View mChild; 33 RotateLayout(Context context, AttributeSet attrs)34 public RotateLayout(Context context, AttributeSet attrs) { 35 super(context, attrs); 36 // The transparent background here is a workaround of the render issue 37 // happened when the view is rotated as the device's orientation 38 // changed. The view looks fine in landscape. After rotation, the view 39 // is invisible. 40 setBackgroundResource(android.R.color.transparent); 41 } 42 43 @Override onFinishInflate()44 protected void onFinishInflate() { 45 mChild = getChildAt(0); 46 mChild.setPivotX(0); 47 mChild.setPivotY(0); 48 } 49 50 @Override onLayout( boolean change, int left, int top, int right, int bottom)51 protected void onLayout( 52 boolean change, int left, int top, int right, int bottom) { 53 int width = right - left; 54 int height = bottom - top; 55 switch (mOrientation) { 56 case 0: 57 case 180: 58 mChild.layout(0, 0, width, height); 59 break; 60 case 90: 61 case 270: 62 mChild.layout(0, 0, height, width); 63 break; 64 } 65 } 66 67 @Override onMeasure(int widthSpec, int heightSpec)68 protected void onMeasure(int widthSpec, int heightSpec) { 69 int w = 0, h = 0; 70 switch(mOrientation) { 71 case 0: 72 case 180: 73 measureChild(mChild, widthSpec, heightSpec); 74 w = mChild.getMeasuredWidth(); 75 h = mChild.getMeasuredHeight(); 76 break; 77 case 90: 78 case 270: 79 measureChild(mChild, heightSpec, widthSpec); 80 w = mChild.getMeasuredHeight(); 81 h = mChild.getMeasuredWidth(); 82 break; 83 } 84 setMeasuredDimension(w, h); 85 86 switch (mOrientation) { 87 case 0: 88 mChild.setTranslationX(0); 89 mChild.setTranslationY(0); 90 break; 91 case 90: 92 mChild.setTranslationX(0); 93 mChild.setTranslationY(h); 94 break; 95 case 180: 96 mChild.setTranslationX(w); 97 mChild.setTranslationY(h); 98 break; 99 case 270: 100 mChild.setTranslationX(w); 101 mChild.setTranslationY(0); 102 break; 103 } 104 mChild.setRotation(-mOrientation); 105 } 106 107 @Override shouldDelayChildPressedState()108 public boolean shouldDelayChildPressedState() { 109 return false; 110 } 111 112 // Rotate the view counter-clockwise 113 @Override setOrientation(int orientation, boolean animation)114 public void setOrientation(int orientation, boolean animation) { 115 orientation = orientation % 360; 116 if (mOrientation == orientation) return; 117 mOrientation = orientation; 118 requestLayout(); 119 } 120 getOrientation()121 public int getOrientation() { 122 return mOrientation; 123 } 124 } 125