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 final Rect mCurrentInsets = new Rect(0, 0, 0, 0); 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 // insets include status bar, navigation bar, etc 57 // In this case, we are only concerned with the size of nav bar 58 if (mCurrentInsets.equals(insets)) { 59 // Local copy of the insets is up to date. No need to do anything. 60 return false; 61 } 62 63 if (mOffset == 0) { 64 if (insets.bottom > 0) { 65 mOffset = insets.bottom; 66 } else if (insets.right > 0) { 67 mOffset = insets.right; 68 } 69 } 70 mCurrentInsets.set(insets); 71 // Make sure onMeasure will be called to adapt to the new insets. 72 requestLayout(); 73 return false; 74 } 75 76 public void initDisplayListener() { 77 if (ApiHelper.HAS_DISPLAY_LISTENER) { 78 mDisplayListener = new DisplayListener() { 79 80 @Override 81 public void onDisplayAdded(int arg0) {} 82 83 @Override 84 public void onDisplayChanged(int arg0) { 85 if (mListener != null) { 86 mListener.onDisplayChanged(); 87 } 88 } 89 90 @Override 91 public void onDisplayRemoved(int arg0) {} 92 }; 93 } 94 } 95 96 public void removeDisplayChangeListener() { 97 mListener = null; 98 } 99 100 public void setDisplayChangeListener(MyDisplayListener listener) { 101 mListener = listener; 102 } 103 104 @Override 105 public void onAttachedToWindow() { 106 super.onAttachedToWindow(); 107 if (ApiHelper.HAS_DISPLAY_LISTENER) { 108 ((DisplayManager) getContext().getSystemService(Context.DISPLAY_SERVICE)) 109 .registerDisplayListener((DisplayListener) mDisplayListener, null); 110 } 111 } 112 113 @Override 114 public void onDetachedFromWindow () { 115 super.onDetachedFromWindow(); 116 if (ApiHelper.HAS_DISPLAY_LISTENER) { 117 ((DisplayManager) getContext().getSystemService(Context.DISPLAY_SERVICE)) 118 .unregisterDisplayListener((DisplayListener) mDisplayListener); 119 } 120 } 121 122 @Override 123 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 124 int rotation = CameraUtil.getDisplayRotation((Activity) getContext()); 125 // all the layout code assumes camera device orientation to be portrait 126 // adjust rotation for landscape 127 int orientation = getResources().getConfiguration().orientation; 128 int camOrientation = (rotation % 180 == 0) ? Configuration.ORIENTATION_PORTRAIT 129 : Configuration.ORIENTATION_LANDSCAPE; 130 if (camOrientation != orientation) { 131 rotation = (rotation + 90) % 360; 132 } 133 // calculate margins 134 mLeftMargin = 0; 135 mRightMargin = 0; 136 mBottomMargin = 0; 137 mTopMargin = 0; 138 switch (rotation) { 139 case 0: 140 mBottomMargin += mOffset; 141 break; 142 case 90: 143 mRightMargin += mOffset; 144 break; 145 case 180: 146 mTopMargin += mOffset; 147 break; 148 case 270: 149 mLeftMargin += mOffset; 150 break; 151 } 152 if (mCurrentInsets != null) { 153 if (mCurrentInsets.right > 0) { 154 // navigation bar on the right 155 mRightMargin = mRightMargin > 0 ? mRightMargin : mCurrentInsets.right; 156 } else { 157 // navigation bar on the bottom 158 mBottomMargin = mBottomMargin > 0 ? mBottomMargin : mCurrentInsets.bottom; 159 } 160 } 161 // make sure all the children are resized 162 super.onMeasure(widthMeasureSpec - mLeftMargin - mRightMargin, 163 heightMeasureSpec - mTopMargin - mBottomMargin); 164 setMeasuredDimension(widthMeasureSpec, heightMeasureSpec); 165 } 166 167 @Override 168 public void onLayout(boolean changed, int l, int t, int r, int b) { 169 r -= l; 170 b -= t; 171 l = 0; 172 t = 0; 173 int orientation = getResources().getConfiguration().orientation; 174 // Lay out children 175 for (int i = 0; i < getChildCount(); i++) { 176 View v = getChildAt(i); 177 if (v instanceof CameraControls) { 178 // Lay out camera controls to center on the short side of the screen 179 // so that they stay in place during rotation 180 int width = v.getMeasuredWidth(); 181 int height = v.getMeasuredHeight(); 182 if (orientation == Configuration.ORIENTATION_PORTRAIT) { 183 int left = (l + r - width) / 2; 184 v.layout(left, t + mTopMargin, left + width, b - mBottomMargin); 185 } else { 186 int top = (t + b - height) / 2; 187 v.layout(l + mLeftMargin, top, r - mRightMargin, top + height); 188 } 189 } else { 190 v.layout(l + mLeftMargin, t + mTopMargin, r - mRightMargin, b - mBottomMargin); 191 } 192 } 193 } 194 } 195
