PreviewPageFrame.java revision a7bb6fbeab933326d58aa806d8194b7b13239d34 
1/*
2 * Copyright (C) 2014 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.printspooler.widget;
18
19import android.content.Context;
20import android.util.AttributeSet;
21import android.view.accessibility.AccessibilityEvent;
22import android.view.accessibility.AccessibilityNodeInfo;
23import android.widget.CompoundButton;
24import android.widget.LinearLayout;
25import com.android.printspooler.R;
26
27/**
28 * This class represents the frame of page in the print preview list
29 * that contains the page and a footer.
30 */
31public final class PreviewPageFrame extends LinearLayout {
32    private final float mSelectedElevation;
33    private final float mNotSelectedElevation;
34
35    private final float mSelectedPageAlpha;
36    private final float mNotSelectedAlpha;
37
38    public PreviewPageFrame(Context context, AttributeSet attrs) {
39        super(context, attrs);
40        mSelectedElevation = mContext.getResources().getDimension(
41                R.dimen.selected_page_elevation);
42        mNotSelectedElevation = mContext.getResources().getDimension(
43                R.dimen.unselected_page_elevation);
44        mSelectedPageAlpha = mContext.getResources().getFraction(
45                R.fraction.page_selected_alpha, 1, 1);
46        mNotSelectedAlpha = mContext.getResources().getFraction(
47                R.fraction.page_unselected_alpha, 1, 1);
48    }
49
50    @Override
51    public CharSequence getAccessibilityClassName() {
52        return CompoundButton.class.getName();
53    }
54
55    @Override
56    public void onInitializeAccessibilityEvent(AccessibilityEvent event) {
57        super.onInitializeAccessibilityEvent(event);
58        event.setChecked(isSelected());
59    }
60
61    @Override
62    public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) {
63        super.onInitializeAccessibilityNodeInfo(info);
64        info.setSelected(false);
65        info.setCheckable(true);
66        info.setChecked(isSelected());
67    }
68
69    public void setSelected(boolean selected, boolean animate) {
70        if (isSelected() == selected) {
71            return;
72        }
73        setSelected(selected);
74        if (selected) {
75            if (animate) {
76                animate().translationZ(mSelectedElevation)
77                        .alpha(mSelectedPageAlpha);
78            } else {
79                setTranslationZ(mSelectedElevation);
80                setAlpha(mSelectedPageAlpha);
81            }
82        } else {
83            if (animate) {
84                animate().translationZ(mNotSelectedElevation)
85                        .alpha(mNotSelectedAlpha);
86            } else {
87                setTranslationZ(mNotSelectedElevation);
88                setAlpha(mNotSelectedAlpha);
89            }
90        }
91    }
92}
93