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Winson Chung4c98d922011-05-31 16:50:48 -07001/*
2 * Copyright (C) 2011 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
Daniel Sandler325dc232013-06-05 22:57:57 -040017package com.android.launcher3;
Winson Chung4c98d922011-05-31 16:50:48 -070018
Winson Chung043f2af2012-03-01 16:09:54 -080019import android.animation.TimeInterpolator;
Winson Chung4c98d922011-05-31 16:50:48 -070020import android.content.Context;
Winson Chung043f2af2012-03-01 16:09:54 -080021import android.graphics.PointF;
Winson Chung4c98d922011-05-31 16:50:48 -070022import android.util.AttributeSet;
23import android.view.View;
Winson Chung043f2af2012-03-01 16:09:54 -080024import android.view.animation.AnimationUtils;
Winson Chung4c98d922011-05-31 16:50:48 -070025
Sunny Goyalddec7342015-04-29 18:12:37 -070026import com.android.launcher3.util.FlingAnimation;
Adam Cohen091440a2015-03-18 14:16:05 -070027import com.android.launcher3.util.Thunk;
Kenny Guyed131872014-04-30 03:02:21 +010028
Winson Chung61fa4192011-06-12 15:15:29 -070029public class DeleteDropTarget extends ButtonDropTarget {
Sunny Goyalfa401a12015-04-10 13:45:42 -070030
Winson Chung4c98d922011-05-31 16:50:48 -070031 public DeleteDropTarget(Context context, AttributeSet attrs) {
32 this(context, attrs, 0);
33 }
34
35 public DeleteDropTarget(Context context, AttributeSet attrs, int defStyle) {
36 super(context, attrs, defStyle);
37 }
38
39 @Override
40 protected void onFinishInflate() {
41 super.onFinishInflate();
Winson Chung4c98d922011-05-31 16:50:48 -070042 // Get the hover color
Sunny Goyalfa401a12015-04-10 13:45:42 -070043 mHoverColor = getResources().getColor(R.color.delete_target_hover_tint);
Adam Cohenebea84d2011-11-09 17:20:41 -080044
Sunny Goyal40b626b2015-06-04 22:40:14 -070045 setDrawable(R.drawable.ic_remove_launcher);
Winson Chung4c98d922011-05-31 16:50:48 -070046 }
47
Sunny Goyal1a70cef2015-04-22 11:29:51 -070048 public static boolean supportsDrop(Object info) {
49 return (info instanceof ShortcutInfo)
50 || (info instanceof LauncherAppWidgetInfo)
51 || (info instanceof FolderInfo);
Winson Chunga48487a2012-03-20 16:19:37 -070052 }
53
Winson Chung4c98d922011-05-31 16:50:48 -070054 @Override
Sunny Goyalfa401a12015-04-10 13:45:42 -070055 protected boolean supportsDrop(DragSource source, Object info) {
Sunny Goyal1a70cef2015-04-22 11:29:51 -070056 return source.supportsDeleteDropTarget() && supportsDrop(info);
Winson Chung4c98d922011-05-31 16:50:48 -070057 }
58
59 @Override
Adam Cohen091440a2015-03-18 14:16:05 -070060 @Thunk void completeDrop(DragObject d) {
Michael Jurka1e2f4652013-07-08 18:03:46 -070061 ItemInfo item = (ItemInfo) d.dragInfo;
Sunny Goyalfa401a12015-04-10 13:45:42 -070062 if ((d.dragSource instanceof Workspace) || (d.dragSource instanceof Folder)) {
Sunny Goyal71b5c0b2015-01-08 16:59:04 -080063 removeWorkspaceOrFolderItem(mLauncher, item, null);
Winson Chung4c98d922011-05-31 16:50:48 -070064 }
Sunny Goyal71b5c0b2015-01-08 16:59:04 -080065 }
66
67 /**
68 * Removes the item from the workspace. If the view is not null, it also removes the view.
Sunny Goyal71b5c0b2015-01-08 16:59:04 -080069 */
Sunny Goyale78e3d72015-09-24 11:23:31 -070070 public static void removeWorkspaceOrFolderItem(Launcher launcher, ItemInfo item, View view) {
Winsonfa56b3f2015-09-14 12:01:13 -070071 // Remove the item from launcher and the db, we can ignore the containerInfo in this call
72 // because we already remove the drag view from the folder (if the drag originated from
73 // a folder) in Folder.beginDrag()
Winson2949fb52015-09-24 09:56:11 -070074 launcher.removeItem(view, item, true /* deleteFromDb */);
Winsonc0b52fe2015-09-09 16:38:15 -070075 launcher.getWorkspace().stripEmptyScreens();
Sunny Goyale78e3d72015-09-24 11:23:31 -070076 launcher.getDragLayer().announceForAccessibility(launcher.getString(R.string.item_removed));
Sunny Goyal71b5c0b2015-01-08 16:59:04 -080077 }
78
Sunny Goyalddec7342015-04-29 18:12:37 -070079 @Override
80 public void onFlingToDelete(final DragObject d, PointF vel) {
Winson Chung043f2af2012-03-01 16:09:54 -080081 // Don't highlight the icon as it's animating
82 d.dragView.setColor(0);
83 d.dragView.updateInitialScaleToCurrentScale();
84
Winson Chung043f2af2012-03-01 16:09:54 -080085 final DragLayer dragLayer = mLauncher.getDragLayer();
Sunny Goyalddec7342015-04-29 18:12:37 -070086 FlingAnimation fling = new FlingAnimation(d, vel,
87 getIconRect(d.dragView.getMeasuredWidth(), d.dragView.getMeasuredHeight(),
88 mDrawable.getIntrinsicWidth(), mDrawable.getIntrinsicHeight()),
89 dragLayer);
90
91 final int duration = fling.getDuration();
Winson Chung043f2af2012-03-01 16:09:54 -080092 final long startTime = AnimationUtils.currentAnimationTimeMillis();
93
94 // NOTE: Because it takes time for the first frame of animation to actually be
95 // called and we expect the animation to be a continuation of the fling, we have
96 // to account for the time that has elapsed since the fling finished. And since
97 // we don't have a startDelay, we will always get call to update when we call
98 // start() (which we want to ignore).
99 final TimeInterpolator tInterpolator = new TimeInterpolator() {
100 private int mCount = -1;
101 private float mOffset = 0f;
102
103 @Override
104 public float getInterpolation(float t) {
105 if (mCount < 0) {
106 mCount++;
107 } else if (mCount == 0) {
108 mOffset = Math.min(0.5f, (float) (AnimationUtils.currentAnimationTimeMillis() -
109 startTime) / duration);
110 mCount++;
111 }
112 return Math.min(1f, mOffset + t);
113 }
114 };
Michael Jurka1e2f4652013-07-08 18:03:46 -0700115
Winson Chung043f2af2012-03-01 16:09:54 -0800116 Runnable onAnimationEndRunnable = new Runnable() {
117 @Override
118 public void run() {
Sunny Goyalddec7342015-04-29 18:12:37 -0700119 mLauncher.exitSpringLoadedDragMode();
120 completeDrop(d);
Winson Chunga48487a2012-03-20 16:19:37 -0700121 mLauncher.getDragController().onDeferredEndFling(d);
Winson Chung043f2af2012-03-01 16:09:54 -0800122 }
123 };
Sunny Goyalddec7342015-04-29 18:12:37 -0700124
125 dragLayer.animateView(d.dragView, fling, duration, tInterpolator, onAnimationEndRunnable,
Winson Chung043f2af2012-03-01 16:09:54 -0800126 DragLayer.ANIMATION_END_DISAPPEAR, null);
127 }
Sunny Goyal1a70cef2015-04-22 11:29:51 -0700128
129 @Override
130 protected String getAccessibilityDropConfirmation() {
131 return getResources().getString(R.string.item_removed);
132 }
Winson Chung4c98d922011-05-31 16:50:48 -0700133}