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/*******************************************************************************
* Copyright (c) 2000, 2004 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;
/*
* TreeEditor example snippet: edit the text of a tree item (in place, fancy)
*
* For a list of all SWT example snippets see
* http://www.eclipse.org/swt/snippets/
*/
import org.eclipse.swt.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.widgets.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.custom.*;
public class Snippet111 {
public static void main (String [] args) {
final Display display = new Display ();
final Color black = display.getSystemColor (SWT.COLOR_BLACK);
Shell shell = new Shell (display);
shell.setLayout (new FillLayout ());
final Tree tree = new Tree (shell, SWT.BORDER);
for (int i=0; i<16; i++) {
TreeItem itemI = new TreeItem (tree, SWT.NONE);
itemI.setText ("Item " + i);
for (int j=0; j<16; j++) {
TreeItem itemJ = new TreeItem (itemI, SWT.NONE);
itemJ.setText ("Item " + j);
}
}
final TreeItem [] lastItem = new TreeItem [1];
final TreeEditor editor = new TreeEditor (tree);
tree.addListener (SWT.Selection, new Listener () {
public void handleEvent (Event event) {
final TreeItem item = (TreeItem) event.item;
if (item != null && item == lastItem [0]) {
boolean showBorder = true;
final Composite composite = new Composite (tree, SWT.NONE);
if (showBorder) composite.setBackground (black);
final Text text = new Text (composite, SWT.NONE);
final int inset = showBorder ? 1 : 0;
composite.addListener (SWT.Resize, new Listener () {
public void handleEvent (Event e) {
Rectangle rect = composite.getClientArea ();
text.setBounds (rect.x + inset, rect.y + inset, rect.width - inset * 2, rect.height - inset * 2);
}
});
Listener textListener = new Listener () {
public void handleEvent (final Event e) {
switch (e.type) {
case SWT.FocusOut:
item.setText (text.getText ());
composite.dispose ();
break;
case SWT.Verify:
String newText = text.getText ();
String leftText = newText.substring (0, e.start);
String rightText = newText.substring (e.end, newText.length ());
GC gc = new GC (text);
Point size = gc.textExtent (leftText + e.text + rightText);
gc.dispose ();
size = text.computeSize (size.x, SWT.DEFAULT);
editor.horizontalAlignment = SWT.LEFT;
Rectangle itemRect = item.getBounds (), rect = tree.getClientArea ();
editor.minimumWidth = Math.max (size.x, itemRect.width) + inset * 2;
int left = itemRect.x, right = rect.x + rect.width;
editor.minimumWidth = Math.min (editor.minimumWidth, right - left);
editor.minimumHeight = size.y + inset * 2;
editor.layout ();
break;
case SWT.Traverse:
switch (e.detail) {
case SWT.TRAVERSE_RETURN:
item.setText (text.getText ());
//FALL THROUGH
case SWT.TRAVERSE_ESCAPE:
composite.dispose ();
e.doit = false;
}
break;
}
}
};
text.addListener (SWT.FocusOut, textListener);
text.addListener (SWT.Traverse, textListener);
text.addListener (SWT.Verify, textListener);
editor.setEditor (composite, item);
text.setText (item.getText ());
text.selectAll ();
text.setFocus ();
}
lastItem [0] = item;
}
});
shell.pack ();
shell.open ();
while (!shell.isDisposed()) {
if (!display.readAndDispatch ()) display.sleep ();
}
display.dispose ();
}
}
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