DismissViewButton.java revision c0d7058b14c24cd07912f5629c26b39b7b4673d5 
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.systemui.statusbar;
18
19import android.content.Context;
20import android.graphics.Canvas;
21import android.graphics.Rect;
22import android.graphics.drawable.AnimatedVectorDrawable;
23import android.graphics.drawable.Drawable;
24import android.util.AttributeSet;
25import android.view.View;
26import android.view.ViewGroup;
27import android.widget.Button;
28
29import com.android.systemui.R;
30import com.android.systemui.statusbar.stack.NotificationStackScrollLayout;
31
32public class DismissViewButton extends Button {
33    private AnimatedVectorDrawable mAnimatedDismissDrawable;
34    private final Drawable mStaticDismissDrawable;
35    private Drawable mActiveDrawable;
36
37    public DismissViewButton(Context context) {
38        this(context, null);
39    }
40
41    public DismissViewButton(Context context, AttributeSet attrs) {
42        this(context, attrs, 0);
43    }
44
45    public DismissViewButton(Context context, AttributeSet attrs, int defStyleAttr) {
46        this(context, attrs, defStyleAttr, 0);
47    }
48
49    public DismissViewButton(Context context, AttributeSet attrs, int defStyleAttr,
50            int defStyleRes) {
51        super(context, attrs, defStyleAttr, defStyleRes);
52        mAnimatedDismissDrawable = (AnimatedVectorDrawable) getContext().getDrawable(
53                R.drawable.dismiss_all_shape_animation).mutate();
54        mAnimatedDismissDrawable.setCallback(this);
55        mAnimatedDismissDrawable.setBounds(0,
56                0,
57                mAnimatedDismissDrawable.getIntrinsicWidth(),
58                mAnimatedDismissDrawable.getIntrinsicHeight());
59        mStaticDismissDrawable = getContext().getDrawable(R.drawable.dismiss_all_shape);
60        mStaticDismissDrawable.setBounds(0,
61                0,
62                mStaticDismissDrawable.getIntrinsicWidth(),
63                mStaticDismissDrawable.getIntrinsicHeight());
64        mStaticDismissDrawable.setCallback(this);
65        mActiveDrawable = mStaticDismissDrawable;
66    }
67
68    @Override
69    protected void onDraw(Canvas canvas) {
70        super.onDraw(canvas);
71        canvas.save();
72        int drawableHeight = mActiveDrawable.getBounds().height();
73        boolean isRtl = (getLayoutDirection() == View.LAYOUT_DIRECTION_RTL);
74        int dx = isRtl ? getWidth() / 2 + drawableHeight / 2 : getWidth() / 2 - drawableHeight / 2;
75        canvas.translate(dx, getHeight() / 2.0f + drawableHeight /
76                2.0f);
77        canvas.scale(isRtl ? -1.0f : 1.0f, -1.0f);
78        mActiveDrawable.draw(canvas);
79        canvas.restore();
80    }
81
82    @Override
83    public boolean performClick() {
84        if (!mAnimatedDismissDrawable.isRunning()) {
85            mActiveDrawable = mAnimatedDismissDrawable;
86            mAnimatedDismissDrawable.start();
87        }
88        return super.performClick();
89    }
90
91    @Override
92    protected boolean verifyDrawable(Drawable who) {
93        return super.verifyDrawable(who)
94                || who == mAnimatedDismissDrawable
95                || who == mStaticDismissDrawable;
96    }
97
98    @Override
99    public boolean hasOverlappingRendering() {
100        return false;
101    }
102
103    /**
104     * This method returns the drawing rect for the view which is different from the regular
105     * drawing rect, since we layout all children in the {@link NotificationStackScrollLayout} at
106     * position 0 and usually the translation is neglected. The standard implementation doesn't
107     * account for translation.
108     *
109     * @param outRect The (scrolled) drawing bounds of the view.
110     */
111    @Override
112    public void getDrawingRect(Rect outRect) {
113        super.getDrawingRect(outRect);
114        float translationX = ((ViewGroup) mParent).getTranslationX();
115        float translationY = ((ViewGroup) mParent).getTranslationY();
116        outRect.left += translationX;
117        outRect.right += translationX;
118        outRect.top += translationY;
119        outRect.bottom += translationY;
120    }
121
122    public void showButton() {
123        mActiveDrawable = mStaticDismissDrawable;
124        invalidate();
125    }
126
127    /**
128     * @return Whether the button is currently static and not being animated.
129     */
130    public boolean isButtonStatic() {
131        return mActiveDrawable == mStaticDismissDrawable;
132    }
133}
134