Attachment 286043 Details for Bug 572615 – Modified Snippet91

Modified Snippet91

Snippet91.java (text/plain), 4.99 KB, created by Phil Beauvoir

on 2021-04-06 06:37:37 EDT

(hide)

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Filename:

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Creator: Phil Beauvoir

Created: 2021-04-06 06:37:37 EDT

Size: 4.99 KB

patch

obsolete

>/*******************************************************************************
> * Copyright (c) 2000, 2013 IBM Corporation and others.
> *
> * This program and the accompanying materials
> * are made available under the terms of the Eclipse Public License 2.0
> * which accompanies this distribution, and is available at
> * https://www.eclipse.org/legal/epl-2.0/
> *
> * SPDX-License-Identifier: EPL-2.0
> *
> * Contributors:
> *     IBM Corporation - initial API and implementation
> *******************************************************************************/
>package org.eclipse.swt.snippets;
>
>/*
> * Drag and Drop example snippet: drag leaf items in a tree
> *
> * For a list of all SWT example snippets see
> * http://www.eclipse.org/swt/snippets/
> */
>import org.eclipse.swt.*;
>import org.eclipse.swt.dnd.*;
>import org.eclipse.swt.graphics.*;
>import org.eclipse.swt.layout.*;
>import org.eclipse.swt.widgets.*;
>
>public class Snippet91 {
>
>public static void main (String [] args) {
>
>	final Display display = new Display ();
>	final Shell shell = new Shell (display);
>	shell.setText("Snippet 91");
>	shell.setLayout(new FillLayout());
>	final Tree tree = new Tree(shell, SWT.BORDER);
>	for (int i = 0; i < 3; i++) {
>		TreeItem item = new TreeItem(tree, SWT.NONE);
>		item.setText("item "+i);
>		for (int j = 0; j < 3; j++) {
>			TreeItem subItem = new TreeItem(item, SWT.NONE);
>			subItem.setText("item "+i+" "+j);
>			for (int k = 0; k < 3; k++) {
>				TreeItem subsubItem = new TreeItem(subItem, SWT.NONE);
>				subsubItem.setText("item "+i+" "+j+" "+k);
>			}
>		}
>	}
>
>	Transfer[] types = new Transfer[] {TextTransfer.getInstance()};
>	int operations = DND.DROP_MOVE | DND.DROP_COPY | DND.DROP_LINK;
>
>	final DragSource source = new DragSource (tree, operations);
>	source.setTransfer(types);
>	final TreeItem[] dragSourceItem = new TreeItem[1];
>	source.addDragListener (new DragSourceListener () {
>		@Override
>		public void dragStart(DragSourceEvent event) {
>			TreeItem[] selection = tree.getSelection();
>			if (selection.length > 0 && selection[0].getItemCount() == 0) {
>				event.doit = true;
>				dragSourceItem[0] = selection[0];
>			} else {
>				event.doit = false;
>			}
>		}
>		@Override
>		public void dragSetData (DragSourceEvent event) {
>			event.data = dragSourceItem[0].getText();
>		}
>		@Override
>		public void dragFinished(DragSourceEvent event) {
>			if (event.detail == DND.DROP_MOVE)
>				dragSourceItem[0].dispose();
>				dragSourceItem[0] = null;
>		}
>	});
>
>	DropTarget target = new DropTarget(tree, operations);
>	target.setTransfer(types);
>	target.addDropListener (new DropTargetAdapter() {
>		@Override
>		public void dragOver(DropTargetEvent event) {
>			event.feedback = DND.FEEDBACK_EXPAND | DND.FEEDBACK_SCROLL;
>			if (event.item != null) {
>				TreeItem item = (TreeItem)event.item;
>				Point pt = display.map(null, tree, event.x, event.y);
>				Rectangle bounds = item.getBounds();
>				if (pt.y < bounds.y + bounds.height/3) {
>					event.feedback |= DND.FEEDBACK_INSERT_BEFORE;
>				} else if (pt.y > bounds.y + 2*bounds.height/3) {
>					event.feedback |= DND.FEEDBACK_INSERT_AFTER;
>				} else {
>					event.feedback |= DND.FEEDBACK_SELECT;
>				}
>			}
>		}
>		
>		@Override
>		public void dragOperationChanged(DropTargetEvent event) {
>		    System.out.println(event);
>		}
>		
>		@Override
>		public void drop(DropTargetEvent event) {
>			if (event.data == null) {
>				event.detail = DND.DROP_NONE;
>				return;
>			}
>			String text = (String)event.data;
>			if (event.item == null) {
>				TreeItem item = new TreeItem(tree, SWT.NONE);
>				item.setText(text);
>			} else {
>				TreeItem item = (TreeItem)event.item;
>				Point pt = display.map(null, tree, event.x, event.y);
>				Rectangle bounds = item.getBounds();
>				TreeItem parent = item.getParentItem();
>				if (parent != null) {
>					TreeItem[] items = parent.getItems();
>					int index = 0;
>					for (int i = 0; i < items.length; i++) {
>						if (items[i] == item) {
>							index = i;
>							break;
>						}
>					}
>					if (pt.y < bounds.y + bounds.height/3) {
>						TreeItem newItem = new TreeItem(parent, SWT.NONE, index);
>						newItem.setText(text);
>					} else if (pt.y > bounds.y + 2*bounds.height/3) {
>						TreeItem newItem = new TreeItem(parent, SWT.NONE, index+1);
>						newItem.setText(text);
>					} else {
>						TreeItem newItem = new TreeItem(item, SWT.NONE);
>						newItem.setText(text);
>					}
>
>				} else {
>					TreeItem[] items = tree.getItems();
>					int index = 0;
>					for (int i = 0; i < items.length; i++) {
>						if (items[i] == item) {
>							index = i;
>							break;
>						}
>					}
>					if (pt.y < bounds.y + bounds.height/3) {
>						TreeItem newItem = new TreeItem(tree, SWT.NONE, index);
>						newItem.setText(text);
>					} else if (pt.y > bounds.y + 2*bounds.height/3) {
>						TreeItem newItem = new TreeItem(tree, SWT.NONE, index+1);
>						newItem.setText(text);
>					} else {
>						TreeItem newItem = new TreeItem(item, SWT.NONE);
>						newItem.setText(text);
>					}
>				}
>
>
>			}
>		}
>	});
>
>	shell.setSize (400, 400);
>	shell.open ();
>	while (!shell.isDisposed ()) {
>		if (!display.readAndDispatch ()) display.sleep ();
>	}
>	display.dispose ();
>}
>}

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Attachments on bug 572615: 286043