BentCornerFigure.java

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 * 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
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 * 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/>.
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package de.monticore.genericgraphics.view.figures;

import org.eclipse.draw2d.ColorConstants;
import org.eclipse.draw2d.Figure;
import org.eclipse.draw2d.Graphics;
import org.eclipse.draw2d.geometry.PointList;
import org.eclipse.draw2d.geometry.Rectangle;

/**
 * A figure that has a bent corner in the top right hand. Typically used for
 * sticky notes.<br>
 * <br>
 * Inspired by Logic Example BentCornerFigure
 * 
 * @author Tim Enger
 */
public class BentCornerFigure extends Figure {
  
  /**
   * The default amount of pixels subtracted from the figure's height and width
   * to determine the size of the corner.
   */
  protected static int DEFAULT_CORNER_SIZE = 10;
  
  private int cornerSize;
  
  /**
   * Constructs an empty BentCornerFigure with default background color of
   * ColorConstants.tooltipBackground and default corner size.
   */
  public BentCornerFigure() {
    setBackgroundColor(ColorConstants.tooltipBackground);
    setForegroundColor(ColorConstants.tooltipForeground);
    setCornerSize(DEFAULT_CORNER_SIZE);
  }
  
  /**
   * Returns the size, in pixels, that the figure should use to draw its bent
   * corner.
   * 
   * @return size of the corner
   */
  public int getCornerSize() {
    return cornerSize;
  }
  
  /**
   * @see org.eclipse.draw2d.Figure#paintFigure(org.eclipse.draw2d.Graphics)
   */
  @Override
  protected void paintFigure(Graphics graphics) {
    Rectangle rect = getBounds().getCopy();
    
    graphics.translate(getLocation());
    
    // fill the note
    PointList outline = new PointList();
    
    outline.addPoint(0, 0);
    outline.addPoint(rect.width - cornerSize, 0);
    outline.addPoint(rect.width - 1, cornerSize);
    outline.addPoint(rect.width - 1, rect.height - 1);
    outline.addPoint(0, rect.height - 1);
    
    graphics.fillPolygon(outline);
    
    // draw the inner outline
    PointList innerLine = new PointList();
    
    innerLine.addPoint(rect.width - cornerSize - 1, 0);
    innerLine.addPoint(rect.width - cornerSize - 1, cornerSize);
    innerLine.addPoint(rect.width - 1, cornerSize);
    innerLine.addPoint(rect.width - cornerSize - 1, 0);
    innerLine.addPoint(0, 0);
    innerLine.addPoint(0, rect.height - 1);
    innerLine.addPoint(rect.width - 1, rect.height - 1);
    innerLine.addPoint(rect.width - 1, cornerSize);
    
    graphics.drawPolygon(innerLine);
    
    graphics.translate(getLocation().getNegated());
  }
  
  /**
   * Sets the size of the figure's corner to the given offset.
   * 
   * @param newSize The new size to use.
   */
  public void setCornerSize(int newSize) {
    cornerSize = newSize;
  }
}