Home | History | Annotate | Download | only in ui 
      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.app.Activity;
     20 import android.content.Context;
     21 import android.content.pm.ActivityInfo;
     22 import android.util.AttributeSet;
     23 import android.util.Log;
     24 import android.widget.RelativeLayout;
     25 
     26 /**
     27  * A layout which handles the the width of the control panel, which contains
     28  * the shutter button, thumbnail, front/back camera picker, and mode picker.
     29  * The purpose of this is to have a consistent width of control panel in camera,
     30  * camcorder, and panorama modes.
     31  */
     32 public class ControlPanelLayout extends RelativeLayout {
     33     private static final String TAG = "ControlPanelLayout";
     34 
     35     public ControlPanelLayout(Context context, AttributeSet attrs) {
     36         super(context, attrs);
     37     }
     38 
     39     @Override
     40     protected void onMeasure(int widthSpec, int heightSpec) {
     41         int widthSpecSize = MeasureSpec.getSize(widthSpec);
     42         int heightSpecSize = MeasureSpec.getSize(heightSpec);
     43         int measuredSize = 0;
     44         int mode, longSideSize, shortSideSize, specSize;
     45 
     46         boolean isLandscape = (((Activity) getContext()).getRequestedOrientation()
     47                 == ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
     48 
     49         if (isLandscape) {
     50             mode = MeasureSpec.getMode(widthSpec);
     51             longSideSize = widthSpecSize;
     52             shortSideSize = heightSpecSize;
     53             specSize = widthSpecSize;
     54         } else {
     55             mode = MeasureSpec.getMode(heightSpec);
     56             longSideSize = heightSpecSize;
     57             shortSideSize = widthSpecSize;
     58             specSize = heightSpecSize;
     59         }
     60 
     61         if (widthSpecSize > 0 && heightSpecSize > 0 && mode == MeasureSpec.AT_MOST) {
     62             // Calculate how big 4:3 preview occupies. Then deduct it from the
     63             // width of the parent.
     64             measuredSize = (int) (longSideSize - shortSideSize / 3.0 * 4.0);
     65         } else {
     66             Log.e(TAG, "layout_xxx of ControlPanelLayout should be wrap_content");
     67         }
     68 
     69         // The size cannot be smaller than minimum constraint.
     70         int minimumSize = (isLandscape) ? getMinimumWidth() : getMinimumHeight();
     71         if (measuredSize < minimumSize) {
     72             measuredSize = minimumSize;
     73         }
     74 
     75         // The size cannot be bigger than the constraint.
     76         if (mode == MeasureSpec.AT_MOST && measuredSize > specSize) {
     77             measuredSize = specSize;
     78         }
     79 
     80         if (isLandscape) {
     81             widthSpec = MeasureSpec.makeMeasureSpec(measuredSize, MeasureSpec.EXACTLY);
     82         } else {
     83             heightSpec = MeasureSpec.makeMeasureSpec(measuredSize, MeasureSpec.EXACTLY);
     84         }
     85 
     86         super.onMeasure(widthSpec, heightSpec);
     87     }
     88 }
     89