Mega Code Archive
Dragging text in a StyledText widget
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/*******************************************************************************
* Copyright (c) 2000, 2005 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
//package org.eclipse.swt.snippets;
/*
* Dragging text in a StyledText widget
*
* For a list of all SWT example snippets see
* http://www.eclipse.org/swt/snippets/
*
* @since 3.2
*/
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.StyledText;
import org.eclipse.swt.dnd.DND;
import org.eclipse.swt.dnd.DragSource;
import org.eclipse.swt.dnd.DragSourceAdapter;
import org.eclipse.swt.dnd.DragSourceEvent;
import org.eclipse.swt.dnd.DropTarget;
import org.eclipse.swt.dnd.DropTargetAdapter;
import org.eclipse.swt.dnd.DropTargetEvent;
import org.eclipse.swt.dnd.TextTransfer;
import org.eclipse.swt.dnd.Transfer;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
public class DragTextInStyledText {
static String string1 = "A drag source is the provider of data in a Drag and Drop data transfer as well as "
+ "the originator of the Drag and Drop operation. The data provided by the drag source "
+ "may be transferred to another location in the same widget, to a different widget "
+ "within the same application, or to a different application altogether. For example, "
+ "you can drag text from your application and drop it on an email application, or you "
+ "could drag an item in a tree and drop it below a different node in the same tree.";
static String string2 = "A drop target receives data in a Drag and Drop operation. The data received by "
+ "the drop target may have come from the same widget, from a different widget within "
+ "the same application, or from a different application altogether. For example, you "
+ "can drag text from an email application and drop it on your application, or you could "
+ "drag an item in a tree and drop it below a different node in the same tree.";
public static void main(String[] args) {
final Display display = new Display();
Shell shell = new Shell(display);
shell.setLayout(new FillLayout());
int style = SWT.MULTI | SWT.WRAP | SWT.H_SCROLL | SWT.V_SCROLL | SWT.BORDER;
final StyledText text1 = new StyledText(shell, style);
text1.setText(string1);
DragSource source = new DragSource(text1, DND.DROP_COPY | DND.DROP_MOVE);
source.setTransfer(new Transfer[] { TextTransfer.getInstance() });
source.addDragListener(new DragSourceAdapter() {
Point selection;
public void dragStart(DragSourceEvent e) {
selection = text1.getSelection();
e.doit = selection.x != selection.y;
}
public void dragSetData(DragSourceEvent e) {
e.data = text1.getText(selection.x, selection.y - 1);
}
public void dragFinished(DragSourceEvent e) {
if (e.detail == DND.DROP_MOVE) {
text1.replaceTextRange(selection.x, selection.y - selection.x, "");
}
selection = null;
}
});
final StyledText text2 = new StyledText(shell, style);
text2.setText(string2);
DropTarget target = new DropTarget(text2, DND.DROP_DEFAULT | DND.DROP_MOVE | DND.DROP_COPY
| DND.DROP_LINK);
target.setTransfer(new Transfer[] { TextTransfer.getInstance() });
target.addDropListener(new DropTargetAdapter() {
public void dragEnter(DropTargetEvent e) {
if (e.detail == DND.DROP_DEFAULT)
e.detail = DND.DROP_COPY;
}
public void dragOperationChanged(DropTargetEvent e) {
if (e.detail == DND.DROP_DEFAULT)
e.detail = DND.DROP_COPY;
}
public void drop(DropTargetEvent e) {
text2.insert((String) e.data);
}
});
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
display.dispose();
}
}
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