diff options
Diffstat (limited to 'src/com/android/launcher3/SpringLoadedDragController.java')
-rw-r--r-- | src/com/android/launcher3/SpringLoadedDragController.java | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/src/com/android/launcher3/SpringLoadedDragController.java b/src/com/android/launcher3/SpringLoadedDragController.java new file mode 100644 index 000000000..45edaef86 --- /dev/null +++ b/src/com/android/launcher3/SpringLoadedDragController.java @@ -0,0 +1,62 @@ +/* + * 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.launcher3; + +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 = 500; + final long ENTER_SPRING_LOAD_CANCEL_HOVER_TIME = 950; + 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; + + public SpringLoadedDragController(Launcher launcher) { + mLauncher = launcher; + mAlarm = new Alarm(); + mAlarm.setOnAlarmListener(this); + } + + public void cancel() { + mAlarm.cancelAlarm(); + } + + // Set a new alarm to expire for the screen that we are hovering over now + public void setAlarm(CellLayout cl) { + mAlarm.cancelAlarm(); + mAlarm.setAlarm((cl == null) ? ENTER_SPRING_LOAD_CANCEL_HOVER_TIME : + ENTER_SPRING_LOAD_HOVER_TIME); + mScreen = cl; + } + + // this is called when our timer runs out + public void onAlarm(Alarm alarm) { + if (mScreen != null) { + // Snap to the screen that we are hovering over now + Workspace w = mLauncher.getWorkspace(); + int page = w.indexOfChild(mScreen); + if (page != w.getCurrentPage()) { + w.snapToPage(page); + } + } else { + mLauncher.getDragController().cancelDrag(); + } + } +} |