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/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.launcher2;
public class SpringLoadedDragController implements OnAlarmListener {
// how long the user must hover over a mini-screen before it unshrinks
final long ENTER_SPRING_LOAD_HOVER_TIME = 1000;
final long EXIT_SPRING_LOAD_HOVER_TIME = 200;
Alarm mAlarm;
// the screen the user is currently hovering over, if any
private CellLayout mScreen;
private Launcher mLauncher;
boolean mFinishedAnimation = false;
boolean mWaitingToReenter = false;
public SpringLoadedDragController(Launcher launcher) {
mLauncher = launcher;
mAlarm = new Alarm();
mAlarm.setOnAlarmListener(this);
}
public void onDragEnter(CellLayout cl, boolean isSpringLoaded) {
mScreen = cl;
mAlarm.setAlarm(ENTER_SPRING_LOAD_HOVER_TIME);
mFinishedAnimation = isSpringLoaded;
mWaitingToReenter = false;
}
public void onEnterSpringLoadedMode(boolean waitToReenter) {
mFinishedAnimation = true;
mWaitingToReenter = waitToReenter;
}
public void onDragExit() {
if (mScreen != null) {
mScreen.onDragExit();
}
mScreen = null;
if (mFinishedAnimation && !mWaitingToReenter) {
mAlarm.setAlarm(EXIT_SPRING_LOAD_HOVER_TIME);
}
}
// this is called when our timer runs out
public void onAlarm(Alarm alarm) {
if (mScreen != null) {
// we're currently hovering over a screen
mLauncher.enterSpringLoadedDragMode(mScreen);
} else {
mLauncher.exitSpringLoadedDragMode();
}
}
}
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