1 files changed, 129 insertions, 0 deletions
diff --git a/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/editors/layout/gle2/OutlineDragListener.java b/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/editors/layout/gle2/OutlineDragListener.java
new file mode 100644
index 000000000..1af3053e3
--- /dev/null
+++ b/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/editors/layout/gle2/OutlineDragListener.java
@@ -0,0 +1,129 @@
+/*
+ * 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 org.eclipse.jface.viewers.TreeViewer;
+import org.eclipse.swt.dnd.DND;
+import org.eclipse.swt.dnd.DragSourceEvent;
+import org.eclipse.swt.dnd.DragSourceListener;
+import org.eclipse.swt.dnd.TextTransfer;
+import org.eclipse.swt.graphics.Point;
+import org.eclipse.swt.widgets.Tree;
+import org.eclipse.swt.widgets.TreeItem;
+
+import java.util.ArrayList;
+
+/** Drag listener for the outline page */
+/* package */ class OutlineDragListener implements DragSourceListener {
+    private TreeViewer mTreeViewer;
+    private OutlinePage mOutlinePage;
+    private final ArrayList<SelectionItem> mDragSelection = new ArrayList<SelectionItem>();
+    private SimpleElement[] mDragElements;
+
+    public OutlineDragListener(OutlinePage outlinePage, TreeViewer treeViewer) {
+        super();
+        mOutlinePage = outlinePage;
+        mTreeViewer = treeViewer;
+    }
+
+    @Override
+    public void dragStart(DragSourceEvent e) {
+        Tree tree = mTreeViewer.getTree();
+
+        TreeItem overTreeItem = tree.getItem(new Point(e.x, e.y));
+        if (overTreeItem == null) {
+            // Not dragging over a tree item
+            e.doit = false;
+            return;
+        }
+        CanvasViewInfo over = getViewInfo(overTreeItem);
+        if (over == null) {
+            e.doit = false;
+            return;
+        }
+
+        // The selection logic for the outline is much simpler than in the canvas,
+        // because for one thing, the tree selection is updated synchronously on mouse
+        // down, so it's not possible to start dragging a non-selected item.
+        // We also don't deliberately disallow root-element dragging since you can
+        // drag it into another form.
+        final LayoutCanvas canvas = mOutlinePage.getEditor().getCanvasControl();
+        SelectionManager selectionManager = canvas.getSelectionManager();
+        TreeItem[] treeSelection = tree.getSelection();
+        mDragSelection.clear();
+        for (TreeItem item : treeSelection) {
+            CanvasViewInfo viewInfo = getViewInfo(item);
+            if (viewInfo != null) {
+                mDragSelection.add(selectionManager.createSelection(viewInfo));
+            }
+        }
+        SelectionManager.sanitize(mDragSelection);
+
+        e.doit = !mDragSelection.isEmpty();
+        int imageCount = mDragSelection.size();
+        if (e.doit) {
+            mDragElements = SelectionItem.getAsElements(mDragSelection);
+            GlobalCanvasDragInfo.getInstance().startDrag(mDragElements,
+                    mDragSelection.toArray(new SelectionItem[imageCount]),
+                    canvas, new Runnable() {
+                        @Override
+                        public void run() {
+                            canvas.getClipboardSupport().deleteSelection("Remove",
+                                    mDragSelection);
+                        }
+                    });
+            return;
+        }
+
+        e.detail = DND.DROP_NONE;
+    }
+
+    @Override
+    public void dragSetData(DragSourceEvent e) {
+        if (TextTransfer.getInstance().isSupportedType(e.dataType)) {
+            LayoutCanvas canvas = mOutlinePage.getEditor().getCanvasControl();
+            e.data = SelectionItem.getAsText(canvas, mDragSelection);
+            return;
+        }
+
+        if (SimpleXmlTransfer.getInstance().isSupportedType(e.dataType)) {
+            e.data = mDragElements;
+            return;
+        }
+
+        // otherwise we failed
+        e.detail = DND.DROP_NONE;
+        e.doit = false;
+    }
+
+    @Override
+    public void dragFinished(DragSourceEvent e) {
+        // Unregister the dragged data.
+        // Clear the selection
+        mDragSelection.clear();
+        mDragElements = null;
+        GlobalCanvasDragInfo.getInstance().stopDrag();
+    }
+
+    private CanvasViewInfo getViewInfo(TreeItem item) {
+        Object data = item.getData();
+        if (data != null) {
+            return OutlinePage.getViewInfo(data);
+        }
+
+        return null;
+    }
+}
+\ No newline at end of file