Joe Onorato | e58d1c4 | 2010-04-05 16:15:37 -0500 | [diff] [blame] | 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 | |
Jorim Jaggi | b10e33f | 2015-02-04 21:57:40 +0100 | [diff] [blame] | 17 | package com.android.server.policy; |
Joe Onorato | e58d1c4 | 2010-04-05 16:15:37 -0500 | [diff] [blame] | 18 | |
| 19 | import android.content.Context; |
| 20 | import android.graphics.Canvas; |
| 21 | import android.graphics.Rect; |
| 22 | import android.graphics.drawable.Drawable; |
| 23 | import android.util.AttributeSet; |
Joe Onorato | e58d1c4 | 2010-04-05 16:15:37 -0500 | [diff] [blame] | 24 | import android.view.Gravity; |
| 25 | import android.view.View; |
| 26 | import android.widget.LinearLayout; |
| 27 | |
| 28 | /** |
| 29 | * A vertical linear layout. However, instead of drawing the background |
| 30 | * behnd the items, it draws the background outside the items based on the |
| 31 | * padding. If there isn't enough room to draw both, it clips the background |
| 32 | * instead of the contents. |
| 33 | */ |
| 34 | public class RecentApplicationsBackground extends LinearLayout { |
| 35 | private static final String TAG = "RecentApplicationsBackground"; |
| 36 | |
| 37 | private boolean mBackgroundSizeChanged; |
| 38 | private Drawable mBackground; |
| 39 | private Rect mTmp0 = new Rect(); |
| 40 | private Rect mTmp1 = new Rect(); |
| 41 | |
| 42 | public RecentApplicationsBackground(Context context) { |
| 43 | this(context, null); |
| 44 | init(); |
| 45 | } |
| 46 | |
| 47 | public RecentApplicationsBackground(Context context, AttributeSet attrs) { |
| 48 | super(context, attrs); |
| 49 | init(); |
| 50 | } |
| 51 | |
| 52 | private void init() { |
| 53 | mBackground = getBackground(); |
| 54 | setBackgroundDrawable(null); |
| 55 | setPadding(0, 0, 0, 0); |
| 56 | setGravity(Gravity.CENTER); |
| 57 | } |
| 58 | |
| 59 | @Override |
| 60 | protected boolean setFrame(int left, int top, int right, int bottom) { |
| 61 | setWillNotDraw(false); |
| 62 | if (mLeft != left || mRight != right || mTop != top || mBottom != bottom) { |
| 63 | mBackgroundSizeChanged = true; |
| 64 | } |
| 65 | return super.setFrame(left, top, right, bottom); |
| 66 | } |
| 67 | |
| 68 | @Override |
| 69 | protected boolean verifyDrawable(Drawable who) { |
| 70 | return who == mBackground || super.verifyDrawable(who); |
| 71 | } |
| 72 | |
| 73 | @Override |
Dianne Hackborn | e213677 | 2010-11-04 15:08:59 -0700 | [diff] [blame] | 74 | public void jumpDrawablesToCurrentState() { |
| 75 | super.jumpDrawablesToCurrentState(); |
| 76 | if (mBackground != null) mBackground.jumpToCurrentState(); |
| 77 | } |
| 78 | |
| 79 | @Override |
Joe Onorato | e58d1c4 | 2010-04-05 16:15:37 -0500 | [diff] [blame] | 80 | protected void drawableStateChanged() { |
| 81 | Drawable d = mBackground; |
| 82 | if (d != null && d.isStateful()) { |
| 83 | d.setState(getDrawableState()); |
| 84 | } |
| 85 | super.drawableStateChanged(); |
| 86 | } |
| 87 | |
| 88 | @Override |
| 89 | public void draw(Canvas canvas) { |
| 90 | final Drawable background = mBackground; |
| 91 | if (background != null) { |
| 92 | if (mBackgroundSizeChanged) { |
| 93 | mBackgroundSizeChanged = false; |
| 94 | Rect chld = mTmp0; |
| 95 | Rect bkg = mTmp1; |
| 96 | mBackground.getPadding(bkg); |
| 97 | getChildBounds(chld); |
| 98 | // This doesn't clamp to this view's bounds, which is what we want, |
| 99 | // so that the drawing is clipped. |
| 100 | final int top = chld.top - bkg.top; |
| 101 | final int bottom = chld.bottom + bkg.bottom; |
| 102 | // The background here is a gradient that wants to |
| 103 | // extend the full width of the screen (whatever that |
| 104 | // may be). |
| 105 | int left, right; |
| 106 | if (false) { |
| 107 | // This limits the width of the drawable. |
| 108 | left = chld.left - bkg.left; |
| 109 | right = chld.right + bkg.right; |
| 110 | } else { |
| 111 | // This expands it to full width. |
| 112 | left = 0; |
| 113 | right = getRight(); |
| 114 | } |
| 115 | background.setBounds(left, top, right, bottom); |
| 116 | } |
| 117 | } |
| 118 | mBackground.draw(canvas); |
| 119 | |
| 120 | if (false) { |
| 121 | android.graphics.Paint p = new android.graphics.Paint(); |
| 122 | p.setColor(0x88ffff00); |
| 123 | canvas.drawRect(background.getBounds(), p); |
| 124 | } |
| 125 | canvas.drawARGB((int)(0.75*0xff), 0, 0, 0); |
| 126 | |
| 127 | super.draw(canvas); |
| 128 | } |
| 129 | |
| 130 | @Override |
| 131 | protected void onAttachedToWindow() { |
| 132 | super.onAttachedToWindow(); |
| 133 | mBackground.setCallback(this); |
| 134 | setWillNotDraw(false); |
| 135 | } |
| 136 | |
| 137 | @Override |
| 138 | protected void onDetachedFromWindow() { |
| 139 | super.onDetachedFromWindow(); |
| 140 | mBackground.setCallback(null); |
| 141 | } |
| 142 | |
| 143 | private void getChildBounds(Rect r) { |
| 144 | r.left = r.top = Integer.MAX_VALUE; |
| 145 | r.bottom = r.right = Integer.MIN_VALUE; |
| 146 | final int N = getChildCount(); |
| 147 | for (int i=0; i<N; i++) { |
| 148 | View v = getChildAt(i); |
| 149 | if (v.getVisibility() == View.VISIBLE) { |
| 150 | r.left = Math.min(r.left, v.getLeft()); |
| 151 | r.top = Math.min(r.top, v.getTop()); |
| 152 | r.right = Math.max(r.right, v.getRight()); |
| 153 | r.bottom = Math.max(r.bottom, v.getBottom()); |
| 154 | } |
| 155 | } |
| 156 | } |
| 157 | } |