Attachment 46192 Details for Bug 150005 – Updated version showing the error more accurately

Some Eclipse Foundation services are deprecated, or will be soon. Please ensure you've read this important communication.

Updated version showing the error more accurately

CBComputeSizeError.java (text/plain), 3.33 KB, created by Eric Moffatt

on 2006-07-12 14:55:57 EDT

(hide)

Description:

Filename:

MIME Type:

Creator: Eric Moffatt

Created: 2006-07-12 14:55:57 EDT

Size: 3.33 KB

patch

obsolete

>/*******************************************************************************
> * Copyright (c) 2000, 2006 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 aproj;
>
>/*
> * CoolBar example snippet: drop-down a chevron menu containing hidden tool
> * items
> * 
> * For a list of all SWT example snippets see
> * http://www.eclipse.org/swt/snippets/
> */
>import org.eclipse.swt.SWT;
>import org.eclipse.swt.graphics.Point;
>import org.eclipse.swt.graphics.Rectangle;
>import org.eclipse.swt.widgets.Canvas;
>import org.eclipse.swt.widgets.CoolBar;
>import org.eclipse.swt.widgets.CoolItem;
>import org.eclipse.swt.widgets.Display;
>import org.eclipse.swt.widgets.Shell;
>import org.eclipse.swt.widgets.ToolBar;
>import org.eclipse.swt.widgets.ToolItem;
>
>public class CBComputeSizeError {
>	static Display display;
>	static Shell shell;
>
>	static CoolBar coolBar;
>	static CoolItem coolItem;
>	static ToolBar toolBar;
>	static Canvas border;
>
>	public static void main(String[] args) {
>		display = new Display();
>		shell = new Shell(display);
>		
>		// Construct the elements
>		coolBar = new CoolBar(shell, SWT.FLAT);
>		border = new Canvas(coolBar, SWT.NONE) {
>			public Point computeSize(int wHint, int hHint, boolean changed) {
>				return new Point(100,100);
>			}
>		};
>		coolItem = new CoolItem(coolBar, SWT.DROP_DOWN);
>		coolItem.setControl(border);
>		        
>        // Correctly 'format' the CoolBar/Item based on the contained control 
>		Point borderSize = border.computeSize(SWT.DEFAULT, SWT.DEFAULT);  // ->(100,100) OK
>        Point prefSize = coolItem.computeSize(borderSize.x, borderSize.y);// ->(116,100) OK
>        coolBar.setSize(prefSize);
>        coolItem.setPreferredSize(prefSize);
>        coolItem.setSize(prefSize);             
>		
>        // OK, what are the computed sizes
>        Point coolSize = coolItem.computeSize(SWT.DEFAULT, SWT.DEFAULT); // ->(48,32) why not 'prefSize'?
>		Point cbSize = coolBar.computeSize(SWT.DEFAULT, SWT.DEFAULT);    // ->(116,100) OK
>
>		// Now, pretend that the user has resized the workbench and we 
>		// want to use the new area 
>        Point extendedSize = new Point(prefSize.x + 50, prefSize.y + 50);
>        coolBar.setSize(extendedSize);
>        
>        //coolItem.setPreferredSize(prefSize); // NOTE: -no- change to 'preferred' size
>        coolItem.setSize(extendedSize);             
>		
>        Point eciSize = coolItem.computeSize(SWT.DEFAULT, SWT.DEFAULT); // ->(48,32) ...at least it's consistent...;-)
>        Point ecbSize = coolBar.computeSize(SWT.DEFAULT, SWT.DEFAULT);  // ->(116,150) Huh? This is a 'mix' between the CI's preferred size and the CB's current size
>
>        // Because we now have a 'default' preferred height of 150 for 'ecbSize'
>        // the layout can -never- find its true preferred 'height' anymore...
>        
>		shell.pack();
>		shell.open();
>		while (!shell.isDisposed()) {
>			if (!display.readAndDispatch())
>				display.sleep();
>		}
>		display.dispose();
>	}
>}

Actions: View

Attachments on bug 150005: 46103 | 46192