1 /* 2 * Copyright (C) 2011 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.util.AttributeSet; 21 import android.util.Log; 22 import android.widget.RelativeLayout; 23 24 /** 25 * A layout which handles the the width of the control panel, which contains 26 * the shutter button, thumbnail, front/back camera picker, and mode picker. 27 * The purpose of this is to have a consistent width of control panel in camera, 28 * camcorder, and panorama modes. The control panel can also be GONE and the 29 * preview can expand to full-screen in panorama. 30 */ 31 public class ControlPanelLayout extends RelativeLayout { 32 private static final String TAG = "ControlPanelLayout"; 33 ControlPanelLayout(Context context, AttributeSet attrs)34 public ControlPanelLayout(Context context, AttributeSet attrs) { 35 super(context, attrs); 36 } 37 38 @Override onMeasure(int widthSpec, int heightSpec)39 protected void onMeasure(int widthSpec, int heightSpec) { 40 int widthSpecSize = MeasureSpec.getSize(widthSpec); 41 int heightSpecSize = MeasureSpec.getSize(heightSpec); 42 int widthMode = MeasureSpec.getMode(widthSpec); 43 int measuredWidth = 0; 44 45 if (widthSpecSize > 0 && heightSpecSize > 0 && widthMode == MeasureSpec.AT_MOST) { 46 // Calculate how big 4:3 preview occupies. Then deduct it from the 47 // width of the parent. 48 measuredWidth = (int) (widthSpecSize - heightSpecSize / 3.0 * 4.0 - 16); 49 } else { 50 Log.e(TAG, "layout_width of ControlPanelLayout should be wrap_content"); 51 } 52 53 // Make sure the width is bigger than the minimum width. 54 int minWidth = getSuggestedMinimumWidth(); 55 if (minWidth > measuredWidth) { 56 measuredWidth = minWidth; 57 } 58 59 // The width cannot be bigger than the constraint. 60 if (widthMode == MeasureSpec.AT_MOST && measuredWidth > widthSpecSize) { 61 measuredWidth = widthSpecSize; 62 } 63 64 super.onMeasure(MeasureSpec.makeMeasureSpec(measuredWidth, MeasureSpec.EXACTLY), 65 heightSpec); 66 } 67 } 68