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      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 com.android.camera.PreferenceGroup;
     20 import com.android.camera.R;
     21 import com.android.camera.Util;
     22 
     23 import android.content.Context;
     24 import android.util.AttributeSet;
     25 import android.view.MotionEvent;
     26 import android.view.View;
     27 import android.widget.ImageView;
     28 
     29 /**
     30  * A view that contains the top-level indicator control.
     31  */
     32 public class IndicatorControlBar extends IndicatorControl implements
     33         View.OnClickListener {
     34     private static final String TAG = "IndicatorControlBar";
     35 
     36     // Space between indicator icons.
     37     public static final int ICON_SPACING = Util.dpToPixel(16);
     38 
     39     private ImageView mZoomIcon;
     40     private ImageView mSecondLevelIcon;
     41     private ZoomControlBar mZoomControl;
     42 
     43     public IndicatorControlBar(Context context, AttributeSet attrs) {
     44         super(context, attrs);
     45     }
     46 
     47     @Override
     48     protected void onFinishInflate() {
     49         mSecondLevelIcon = (ImageView)
     50                 findViewById(R.id.second_level_indicator_bar_icon);
     51         mSecondLevelIcon.setOnClickListener(this);
     52     }
     53 
     54     public void initialize(Context context, PreferenceGroup group,
     55             boolean zoomSupported) {
     56         setPreferenceGroup(group);
     57 
     58         // Add CameraPicker control.
     59         initializeCameraPicker();
     60         if (mCameraPicker != null) {
     61             mCameraPicker.setBackgroundResource(R.drawable.bg_pressed);
     62         }
     63 
     64         // Add the ZoomControl if supported.
     65         if (zoomSupported) {
     66             mZoomControl = (ZoomControlBar) findViewById(R.id.zoom_control);
     67             mZoomControl.setVisibility(View.VISIBLE);
     68         }
     69         requestLayout();
     70     }
     71 
     72     @Override
     73     public boolean dispatchTouchEvent(MotionEvent event) {
     74         super.dispatchTouchEvent(event);
     75         // We need to consume the event, or it will trigger tap-to-focus.
     76         return true;
     77     }
     78 
     79     public void onClick(View view) {
     80         dismissSettingPopup();
     81         // Only for the click on mSecondLevelIcon.
     82         mOnIndicatorEventListener.onIndicatorEvent(
     83                 OnIndicatorEventListener.EVENT_ENTER_SECOND_LEVEL_INDICATOR_BAR);
     84     }
     85 
     86     @Override
     87     protected void onLayout(
     88             boolean changed, int left, int top, int right, int bottom) {
     89         int count = getChildCount();
     90         if (count == 0) return;
     91 
     92         // We have (equal) paddings at left and right, but no padding at top or
     93         // bottom.
     94         int padding = getPaddingLeft();
     95         int width = right - left;
     96         int height = bottom - top;
     97 
     98         // We want the icons to be square (size x size)
     99         int size = height;
    100 
    101         mSecondLevelIcon.layout(padding, 0, padding + size, size);
    102 
    103         // Layout the zoom control if required.
    104         if (mZoomControl != null)  {
    105             mZoomControl.layout(padding + size, 0, width - padding - size, size);
    106         }
    107 
    108         if (mCameraPicker != null) {
    109             mCameraPicker.layout(width - padding - size, 0, width - padding, size);
    110         }
    111     }
    112 
    113     @Override
    114     public void setEnabled(boolean enabled) {
    115         super.setEnabled(enabled);
    116         if (mCurrentMode == MODE_VIDEO) {
    117             mSecondLevelIcon.setVisibility(enabled ? View.VISIBLE : View.INVISIBLE);
    118         } else {
    119             // We also disable the zoom button during snapshot.
    120             enableZoom(enabled);
    121         }
    122         mSecondLevelIcon.setEnabled(enabled);
    123     }
    124 
    125     public void enableZoom(boolean enabled) {
    126         if (mZoomControl != null)  mZoomControl.setEnabled(enabled);
    127     }
    128 }
    129