source: default/trunk/de.ugoe.cs.swe.bnftools.ebnf.ui/src/de/ugoe/cs/swe/bnftools/ui/views/syntaxdiagram/SideAnchor.java @ 5

package de.ugoe.cs.swe.bnftools.ui.views.syntaxdiagram;
import org.eclipse.draw2d.AbstractConnectionAnchor;
import org.eclipse.draw2d.IFigure;
import org.eclipse.draw2d.geometry.Point;
import org.eclipse.draw2d.geometry.PrecisionPoint;
import org.eclipse.draw2d.geometry.Rectangle;

class SideAnchor extends AbstractConnectionAnchor {

        public static int LEFT_SIDE = 1;
        public static int RIGHT_SIDE = 2;
        private int side = LEFT_SIDE;
        private SideAnchor heightRef = null;
        
        public SideAnchor(IFigure owner, int side) {
                super(owner);
                this.side = side;
        }

        public SideAnchor(IFigure owner, SideAnchor heightRef, int side) {
                super(owner);
                this.side = side;
                this.heightRef = heightRef;
        }
        
        public Point getLocation(Point loc) {
                Rectangle r = getOwner().getBounds();
                int x,y;
                
                if (side == SideAnchor.LEFT_SIDE) {
                        x = r.x ;
                        
                } else {
                        x = r.x + r.width;
                }
                if (heightRef == null) {
                        y = r.y + r.height/2 ;
                } else {
                        Rectangle heightBounds = heightRef.getOwner().getBounds();
                        y = heightBounds.y + heightBounds.height/2;
                }

                Point p = new PrecisionPoint(x, y);
                getOwner().translateToAbsolute(p);

                return p;
        }
}