ToolbarLayoutWithMinimumSize.java

/*******************************************************************************
 * MontiCore Language Workbench
 * Copyright (c) 2015, 2016, MontiCore, All rights reserved.
 *  
 * This project is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3.0 of the License, or (at your option) any later version.
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this project. If not, see <http://www.gnu.org/licenses/>.
 *******************************************************************************/
package de.monticore.genericgraphics.view.figures.layout;

import org.eclipse.draw2d.IFigure;
import org.eclipse.draw2d.ToolbarLayout;
import org.eclipse.draw2d.geometry.Dimension;

/**
 * <p>
 * An extension of the {@link ToolbarLayout} that takes the minimum size of a
 * {@link IFigure} into account.
 * </p>
 * <p>
 * Yes, this functionality was not given, and I had to implement it.
 * </p>
 * 
 * @author Tim Enger
 */
public class ToolbarLayoutWithMinimumSize extends ToolbarLayout {
  
  @Override
  protected Dimension calculatePreferredSize(IFigure container, int wHint, int hHint) {
    Dimension prefs = super.calculatePreferredSize(container, wHint, hHint);
    Dimension min = getMinimumSize(container, wHint, hHint);
    
    int width;
    if (prefs.width <= min.width) {
      width = min.width;
    }
    else {
      width = prefs.width;
    }
    
    int height;
    if (prefs.height <= min.height) {
      height = min.height;
    }
    else {
      height = prefs.height;
    }
    return new Dimension(width, height);
  }
  
  @Override
  protected Dimension getChildPreferredSize(IFigure child, int wHint, int hHint) {
    Dimension prefs = child.getPreferredSize(wHint, hHint);
    Dimension min = child.getMinimumSize(wHint, hHint);
    
    int width;
    if (prefs.width <= min.width) {
      width = min.width;
    }
    else {
      width = prefs.width;
    }
    
    int height;
    if (prefs.height <= min.height) {
      height = min.height;
    }
    else {
      height = prefs.height;
    }
    return new Dimension(width, height);
  }
}