Launcher2 is now Launcher3.

Changes include
  - moving from com.android.launcher{,2} to
    com.android.launcher3
  - removing wallpapers
  - new temporary icon

Change-Id: I1eabd06059e94a8f3bdf6b620777bd1d2b7c212b

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();
+        }
+    }
+}