diff options
Diffstat (limited to 'eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/editors/layout/gle2/GlobalCanvasDragInfo.java')
| -rw-r--r-- | eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/editors/layout/gle2/GlobalCanvasDragInfo.java | 182 |
1 files changed, 0 insertions, 182 deletions
diff --git a/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/editors/layout/gle2/GlobalCanvasDragInfo.java b/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/editors/layout/gle2/GlobalCanvasDragInfo.java deleted file mode 100644 index b918b00bf..000000000 --- a/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/editors/layout/gle2/GlobalCanvasDragInfo.java +++ /dev/null @@ -1,182 +0,0 @@ -/* - * Copyright (C) 2010 The Android Open Source Project - * - * Licensed under the Eclipse Public License, Version 1.0 (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.eclipse.org/org/documents/epl-v10.php - * - * 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.ide.eclipse.adt.internal.editors.layout.gle2; - -import com.android.annotations.NonNull; -import com.android.annotations.Nullable; -import com.android.ide.common.api.IViewRule; -import com.android.ide.common.api.Rect; - - -/** - * This singleton is used to keep track of drag'n'drops initiated within this - * session of Eclipse. A drag can be initiated from a palette or from a canvas - * and its content is an Android View fully-qualified class name. - * <p/> - * Overall this is a workaround: the issue is that the drag'n'drop SWT API does not - * allow us to know the transfered data during the initial drag -- only when the - * data is dropped do we know what it is about (and to be more exact there is a workaround - * to do just that which works on Windows but not on Linux/Mac SWT). - * <p/> - * In the GLE we'd like to adjust drag feedback to the data being actually dropped. - * The singleton instance of this class will be used to track the data currently dragged - * off a canvas or its palette and then set back to null when the drag'n'drop is finished. - * <p/> - * Note that when a drag starts in one instance of Eclipse and the dragOver/drop is done - * in a <em>separate</em> instance of Eclipse, the dragged FQCN won't be registered here - * and will be null. - */ -final class GlobalCanvasDragInfo { - - private static final GlobalCanvasDragInfo sInstance = new GlobalCanvasDragInfo(); - - private SimpleElement[] mCurrentElements = null; - private SelectionItem[] mCurrentSelection; - private Object mSourceCanvas = null; - private Runnable mRemoveSourceHandler; - private Rect mDragBounds; - private int mDragBaseline = -1; - - /** Private constructor. Use {@link #getInstance()} to retrieve the singleton. */ - private GlobalCanvasDragInfo() { - // pass - } - - /** Returns the singleton instance. */ - public static GlobalCanvasDragInfo getInstance() { - return sInstance; - } - - /** - * Registers the XML elements being dragged. - * - * @param elements The elements being dragged - * @param primary the "primary" element among the elements; when there is a - * single item dragged this will be the same, but in - * multi-selection it will be the element under the mouse as the - * selection was initiated - * @param selection The selection (which can be null, for example when the - * user drags from the palette) - * @param sourceCanvas An object representing the source we are dragging - * from (used for identity comparisons only) - * @param removeSourceHandler A runnable (or null) which can clean up the - * source. It should only be invoked if the drag operation is a - * move, not a copy. - */ - public void startDrag( - @NonNull SimpleElement[] elements, - @Nullable SelectionItem[] selection, - @Nullable Object sourceCanvas, - @Nullable Runnable removeSourceHandler) { - mCurrentElements = elements; - mCurrentSelection = selection; - mSourceCanvas = sourceCanvas; - mRemoveSourceHandler = removeSourceHandler; - } - - /** Unregisters elements being dragged. */ - public void stopDrag() { - mCurrentElements = null; - mCurrentSelection = null; - mSourceCanvas = null; - mRemoveSourceHandler = null; - mDragBounds = null; - } - - public boolean isDragging() { - return mCurrentElements != null; - } - - /** Returns the elements being dragged. */ - @NonNull - public SimpleElement[] getCurrentElements() { - return mCurrentElements; - } - - /** Returns the selection originally dragged. - * Can be null if the drag did not start in a canvas. - */ - public SelectionItem[] getCurrentSelection() { - return mCurrentSelection; - } - - /** - * Returns the object that call {@link #startDrag(SimpleElement[], SelectionItem[], Object)}. - * Can be null. - * This is not meant to access the object indirectly, it is just meant to compare if the - * source and the destination of the drag'n'drop are the same, so object identity - * is all what matters. - */ - public Object getSourceCanvas() { - return mSourceCanvas; - } - - /** - * Removes source of the drag. This should only be called when the drag and - * drop operation is a move (not a copy). - */ - public void removeSource() { - if (mRemoveSourceHandler != null) { - mRemoveSourceHandler.run(); - mRemoveSourceHandler = null; - } - } - - /** - * Get the bounds of the drag, relative to the starting mouse position. For example, - * if you have a rectangular view of size 100x80, and you start dragging at position - * (15,20) from the top left corner of this rectangle, then the drag bounds would be - * (-15,-20, 100x80). - * <p> - * NOTE: The coordinate units will be in SWT/control pixels, not Android view pixels. - * In other words, they are affected by the canvas zoom: If you zoom the view and the - * bounds of a view grow, the drag bounds will be larger. - * - * @return the drag bounds, or null if there are no bounds for the current drag - */ - public Rect getDragBounds() { - return mDragBounds; - } - - /** - * Set the bounds of the drag, relative to the starting mouse position. See - * {@link #getDragBounds()} for details on the semantics of the drag bounds. - * - * @param dragBounds the new drag bounds, or null if there are no drag bounds - */ - public void setDragBounds(Rect dragBounds) { - mDragBounds = dragBounds; - } - - /** - * Returns the baseline of the drag, or -1 if not applicable - * - * @return the current SWT modifier key mask as an {@link IViewRule} modifier mask - */ - public int getDragBaseline() { - return mDragBaseline; - } - - /** - * Sets the baseline of the drag - * - * @param baseline the new baseline - */ - public void setDragBaseline(int baseline) { - mDragBaseline = baseline; - } -} |