SecondLevelIndicatorControlBar.java revision b7d0a0704e437a1892fbf2a6e5138cf36df9fde8 
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
17package com.android.camera.ui;
18
19import com.android.camera.PreferenceGroup;
20import com.android.camera.R;
21import com.android.camera.Util;
22
23import android.content.Context;
24import android.util.AttributeSet;
25import android.view.MotionEvent;
26import android.view.View;
27import android.widget.ImageView;
28
29/**
30 * A view that contains camera setting indicators which are spread over a
31 * vertical bar in preview frame.
32 */
33public class SecondLevelIndicatorControlBar extends IndicatorControl implements
34        View.OnClickListener {
35    private static final String TAG = "SecondLevelIndicatorControlBar";
36    private static int ICON_SPACING = Util.dpToPixel(24);
37    private ImageView mCloseIcon;
38    private View mDivider; // the divider line
39    int mDegree = 0;
40    int mSelectedIndex = -1;
41
42    public SecondLevelIndicatorControlBar(Context context, AttributeSet attrs) {
43        super(context, attrs);
44    }
45
46    @Override
47    protected void onFinishInflate() {
48        mDivider = findViewById(R.id.divider);
49    }
50
51    public void initialize(Context context, PreferenceGroup group,
52            String[] keys, String[] otherSettingKeys) {
53        if (mCloseIcon == null) {
54            mCloseIcon = new ColorFilterImageView(context);
55            mCloseIcon.setImageResource(R.drawable.btn_close_settings);
56            mCloseIcon.setOnClickListener(this);
57            addView(mCloseIcon);
58        }
59        setPreferenceGroup(group);
60        addControls(keys, otherSettingKeys);
61        if (mDegree != 0) setDegree(mDegree);
62    }
63
64    public void onClick(View view) {
65        dismissSettingPopup();
66        mOnIndicatorEventListener.onIndicatorEvent(
67                    OnIndicatorEventListener.EVENT_LEAVE_SECOND_LEVEL_INDICATOR_BAR);
68    }
69
70    private int getTouchViewIndex(int y, int height) {
71        int padding = getPaddingTop();
72        int iconHeight = mCloseIcon.getMeasuredHeight();
73        int totalIconHeight = iconHeight + ICON_SPACING;
74        // If the current touch location is on close icon and above.
75        if (y < padding + totalIconHeight) return indexOfChild(mCloseIcon);
76
77        // The first two views are close icon and divider line, we have to
78        // calculate if the touch event is on the rest indicator buttons.
79        int count = getChildCount();
80        if (count < 3) return -1;
81        int selectionHeight = (count - 2) * totalIconHeight - (ICON_SPACING / 2);
82        int selectionY = height - padding - selectionHeight;
83        if (y < selectionY) return -1;
84        return (2 + (y - selectionY) / totalIconHeight);
85    }
86
87    @Override
88    public boolean dispatchTouchEvent(MotionEvent event) {
89        if (!onFilterTouchEventForSecurity(event)) return false;
90
91        int action = event.getAction();
92        if (!isEnabled()) return false;
93
94        double x = (double) event.getX();
95        double y = (double) event.getY();
96        int height = getHeight();
97        if (height == 0) return false; // the event is sent before onMeasure()
98        if (x > getWidth()) x = getWidth();
99        if (y >= height) y = height - 1;
100
101        int index = getTouchViewIndex((int) y, height);
102        if (index == -1) return true;
103        View b = getChildAt(index);
104        b.dispatchTouchEvent(event);
105        if ((mSelectedIndex != -1) && (index != mSelectedIndex)) {
106            View v = getChildAt(mSelectedIndex);
107            if (v instanceof AbstractIndicatorButton) {
108                AbstractIndicatorButton c = (AbstractIndicatorButton) v;
109                event.setAction(MotionEvent.ACTION_CANCEL);
110                c.dispatchTouchEvent(event);
111                c.dismissPopup();
112            }
113
114            if (action == MotionEvent.ACTION_MOVE) {
115                event.setAction(MotionEvent.ACTION_DOWN);
116                b.dispatchTouchEvent(event);
117            }
118        }
119        mSelectedIndex = index;
120        return true;
121    }
122
123    @Override
124    public void setDegree(int degree) {
125        mDegree = degree;
126        super.setDegree(degree);
127    }
128
129    @Override
130    protected void onLayout(
131            boolean changed, int left, int top, int right, int bottom) {
132        int count = getChildCount();
133        if (count == 0) return;
134        int width = right - left;
135        int height = bottom - top;
136        int iconHeight = mCloseIcon.getMeasuredHeight();
137        int padding = getPaddingTop();
138
139        // The first icon is close button.
140        mCloseIcon.layout(0, padding, width, (padding + iconHeight));
141        // And layout the divider line.
142        mDivider.layout(0, (padding + iconHeight),
143                width, (padding + iconHeight + mDivider.getMeasuredHeight()));
144
145        // Layout from the last icon up.
146        int startY = height - iconHeight - padding;
147        int decrement = iconHeight + ICON_SPACING;
148        for (int i = count - 1; i > 1; --i) {
149            getChildAt(i).layout(0, startY, width, startY + iconHeight);
150            startY -= decrement;
151        }
152    }
153
154    @Override
155    public void setEnabled(boolean enabled) {
156        super.setEnabled(enabled);
157        if (mCurrentMode == MODE_VIDEO) {
158            mCloseIcon.setVisibility(enabled ? View.VISIBLE : View.INVISIBLE);
159        }
160        mCloseIcon.setEnabled(enabled);
161    }
162}
163