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 17 package com.android.camera.ui; 18 19 import android.annotation.SuppressLint; 20 import android.app.Activity; 21 import android.content.Context; 22 import android.content.res.Configuration; 23 import android.graphics.Rect; 24 import android.hardware.display.DisplayManager; 25 import android.hardware.display.DisplayManager.DisplayListener; 26 import android.util.AttributeSet; 27 import android.view.View; 28 import android.widget.FrameLayout; 29 30 import com.android.camera.util.ApiHelper; 31 import com.android.camera.util.CameraUtil; 32 33 @SuppressLint("NewApi") 34 public class CameraRootView extends FrameLayout { 35 36 private int mTopMargin = 0; 37 private int mBottomMargin = 0; 38 private int mLeftMargin = 0; 39 private int mRightMargin = 0; 40 private Rect mCurrentInsets; 41 private int mOffset = 0; 42 private Object mDisplayListener; 43 private MyDisplayListener mListener; 44 45 public interface MyDisplayListener { 46 public void onDisplayChanged(); 47 } 48 49 public CameraRootView(Context context, AttributeSet attrs) { 50 super(context, attrs); 51 initDisplayListener(); 52 } 53 54 @Override 55 protected boolean fitSystemWindows(Rect insets) { 56 mCurrentInsets = insets; 57 // insets include status bar, navigation bar, etc 58 // In this case, we are only concerned with the size of nav bar 59 if (mOffset > 0) { 60 return true; 61 } 62 63 if (insets.bottom > 0) { 64 mOffset = insets.bottom; 65 } else if (insets.right > 0) { 66 mOffset = insets.right; 67 } 68 return true; 69 } 70 71 public void initDisplayListener() { 72 if (ApiHelper.HAS_DISPLAY_LISTENER) { 73 mDisplayListener = new DisplayListener() { 74 75 @Override 76 public void onDisplayAdded(int arg0) {} 77 78 @Override 79 public void onDisplayChanged(int arg0) { 80 if (mListener != null) { 81 mListener.onDisplayChanged(); 82 } 83 } 84 85 @Override 86 public void onDisplayRemoved(int arg0) {} 87 }; 88 } 89 } 90 91 public void removeDisplayChangeListener() { 92 mListener = null; 93 } 94 95 public void setDisplayChangeListener(MyDisplayListener listener) { 96 mListener = listener; 97 } 98 99 @Override 100 public void onAttachedToWindow() { 101 super.onAttachedToWindow(); 102 if (ApiHelper.HAS_DISPLAY_LISTENER) { 103 ((DisplayManager) getContext().getSystemService(Context.DISPLAY_SERVICE)) 104 .registerDisplayListener((DisplayListener) mDisplayListener, null); 105 } 106 } 107 108 @Override 109 public void onDetachedFromWindow () { 110 super.onDetachedFromWindow(); 111 if (ApiHelper.HAS_DISPLAY_LISTENER) { 112 ((DisplayManager) getContext().getSystemService(Context.DISPLAY_SERVICE)) 113 .unregisterDisplayListener((DisplayListener) mDisplayListener); 114 } 115 } 116 117 @Override 118 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 119 int rotation = CameraUtil.getDisplayRotation((Activity) getContext()); 120 // all the layout code assumes camera device orientation to be portrait 121 // adjust rotation for landscape 122 int orientation = getResources().getConfiguration().orientation; 123 int camOrientation = (rotation % 180 == 0) ? Configuration.ORIENTATION_PORTRAIT 124 : Configuration.ORIENTATION_LANDSCAPE; 125 if (camOrientation != orientation) { 126 rotation = (rotation + 90) % 360; 127 } 128 // calculate margins 129 mLeftMargin = 0; 130 mRightMargin = 0; 131 mBottomMargin = 0; 132 mTopMargin = 0; 133 switch (rotation) { 134 case 0: 135 mBottomMargin += mOffset; 136 break; 137 case 90: 138 mRightMargin += mOffset; 139 break; 140 case 180: 141 mTopMargin += mOffset; 142 break; 143 case 270: 144 mLeftMargin += mOffset; 145 break; 146 } 147 if (mCurrentInsets != null) { 148 if (mCurrentInsets.right > 0) { 149 // navigation bar on the right 150 mRightMargin = mRightMargin > 0 ? mRightMargin : mCurrentInsets.right; 151 } else { 152 // navigation bar on the bottom 153 mBottomMargin = mBottomMargin > 0 ? mBottomMargin : mCurrentInsets.bottom; 154 } 155 } 156 // make sure all the children are resized 157 super.onMeasure(widthMeasureSpec - mLeftMargin - mRightMargin, 158 heightMeasureSpec - mTopMargin - mBottomMargin); 159 setMeasuredDimension(widthMeasureSpec, heightMeasureSpec); 160 } 161 162 @Override 163 public void onLayout(boolean changed, int l, int t, int r, int b) { 164 r -= l; 165 b -= t; 166 l = 0; 167 t = 0; 168 int orientation = getResources().getConfiguration().orientation; 169 // Lay out children 170 for (int i = 0; i < getChildCount(); i++) { 171 View v = getChildAt(i); 172 if (v instanceof CameraControls) { 173 // Lay out camera controls to center on the short side of the screen 174 // so that they stay in place during rotation 175 int width = v.getMeasuredWidth(); 176 int height = v.getMeasuredHeight(); 177 if (orientation == Configuration.ORIENTATION_PORTRAIT) { 178 int left = (l + r - width) / 2; 179 v.layout(left, t + mTopMargin, left + width, b - mBottomMargin); 180 } else { 181 int top = (t + b - height) / 2; 182 v.layout(l + mLeftMargin, top, r - mRightMargin, top + height); 183 } 184 } else { 185 v.layout(l + mLeftMargin, t + mTopMargin, r - mRightMargin, b - mBottomMargin); 186 } 187 } 188 } 189 } 190
