blob: a734258f9402d21e3c08ae5a91dd95e974d3630f [file] [log] [blame]
Michael Jurkad3ef3062010-11-23 16:23:58 -08001/*
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.launcher2;
18
19public class SpringLoadedDragController implements OnAlarmListener {
20 // how long the user must hover over a mini-screen before it unshrinks
21 final long ENTER_SPRING_LOAD_HOVER_TIME = 1000;
22 final long EXIT_SPRING_LOAD_HOVER_TIME = 200;
23
24 Alarm mAlarm;
25
26 // the screen the user is currently hovering over, if any
27 private CellLayout mScreen;
28 private Launcher mLauncher;
29
30 public SpringLoadedDragController(Launcher launcher) {
31 mLauncher = launcher;
32 mAlarm = new Alarm();
33 mAlarm.setOnAlarmListener(this);
34 }
35
36 public void onDragEnter(CellLayout cl) {
37 mScreen = cl;
38 mAlarm.setAlarm(ENTER_SPRING_LOAD_HOVER_TIME);
39 }
40
41 public void onDragExit() {
42 if (mScreen != null) {
43 mScreen.onDragExit();
44 }
45 mScreen = null;
46 mAlarm.setAlarm(EXIT_SPRING_LOAD_HOVER_TIME);
47 }
48
49 // this is called when our timer runs out
50 public void onAlarm(Alarm alarm) {
51 if (mScreen != null) {
52 // we're currently hovering over a screen
53 mLauncher.enterSpringLoadedDragMode(mScreen);
54 } else {
55 mLauncher.exitSpringLoadedDragMode();
56 }
57 }
58}