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Diffstat (limited to 'src/com/android/launcher/DropTarget.java')
-rw-r--r-- | src/com/android/launcher/DropTarget.java | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/src/com/android/launcher/DropTarget.java b/src/com/android/launcher/DropTarget.java new file mode 100644 index 000000000..812908906 --- /dev/null +++ b/src/com/android/launcher/DropTarget.java @@ -0,0 +1,59 @@ +/* + * Copyright (C) 2008 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.launcher; + +/** + * Interface defining an object that can receive a drag. + * + */ +public interface DropTarget { + + /** + * Handle an object being dropped on the DropTarget + * + * @param source DragSource where the drag started + * @param x X coordinate of the drop location + * @param y Y coordinate of the drop location + * @param xOffset Horizontal offset with the object being dragged where the original touch happened + * @param yOffset Vertical offset with the object being dragged where the original touch happened + * @param dragInfo Data associated with the object being dragged + * + */ + void onDrop(DragSource source, int x, int y, int xOffset, int yOffset, Object dragInfo); + + void onDragEnter(DragSource source, int x, int y, int xOffset, int yOffset, Object dragInfo); + + void onDragOver(DragSource source, int x, int y, int xOffset, int yOffset, Object dragInfo); + + void onDragExit(DragSource source, int x, int y, int xOffset, int yOffset, Object dragInfo); + + /** + * Indicates whether a drop action can occur at the specified location. The method + * {@link #onDrop(DragSource, int, int, int, int, Object)} will be invoked on this + * drop target only if this method returns true. + * + * @param source DragSource where the drag started + * @param x X coordinate of the drop location + * @param y Y coordinate of the drop location + * @param xOffset Horizontal offset with the object being dragged where the original touch happened + * @param yOffset Vertical offset with the object being dragged where the original touch happened + * @param dragInfo Data associated with the object being dragged + * + * return True if the drop is accepted, false otherwise. + */ + boolean acceptDrop(DragSource source, int x, int y, int xOffset, int yOffset, Object dragInfo); +} |