org.eclipse.swt.layout.FillData Maven / Gradle / Ivy

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/*******************************************************************************
 * 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.layout;

import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.internal.SerializableCompatibility;
import org.eclipse.swt.widgets.Control;

class FillData 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;
}
}