org.eclipse.swt.custom.CLayoutData Maven / Gradle / Ivy
/*******************************************************************************
* Copyright (c) 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.custom;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.internal.SerializableCompatibility;
import org.eclipse.swt.widgets.Control;
class CLayoutData implements SerializableCompatibility {
int defaultWidth = -1, defaultHeight = -1;
int currentWhint, currentHhint, currentWidth = -1, currentHeight = -1;
Point computeSize( Control control, int wHint, int hHint, boolean flushCache )
{
if( flushCache )
flushCache();
if( wHint == SWT.DEFAULT && hHint == SWT.DEFAULT ) {
if( defaultWidth == -1 || defaultHeight == -1 ) {
Point size = control.computeSize( wHint, hHint, flushCache );
defaultWidth = size.x;
defaultHeight = size.y;
}
return new Point( defaultWidth, defaultHeight );
}
if( currentWidth == -1
|| currentHeight == -1
|| wHint != currentWhint
|| hHint != currentHhint )
{
Point size = control.computeSize( wHint, hHint, flushCache );
currentWhint = wHint;
currentHhint = hHint;
currentWidth = size.x;
currentHeight = size.y;
}
return new Point( currentWidth, currentHeight );
}
void flushCache() {
defaultWidth = defaultHeight = -1;
currentWidth = currentHeight = -1;
}
}