twistetogglestrategy.java

利用它可以做出非常漂亮的swt界面,包含的组件有PShelf Plist

package com.swtplus.widgets.toggle;

import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.widgets.Widget;

import com.swtplus.internal.PGC;


/**
 * This toggle strategy appears as a triangle pointing to the right when
 * collapsed and pointing downwards when expanded.
 *
 * @author chris
 */
public class TwisteToggleStrategy implements IToggleStrategy {

	private Point location;
	
	/* (non-Javadoc)
	 * @see com.swtplus.widgets.toggle.IToggleStrategy#paint(org.eclipse.swt.events.PaintEvent, boolean, boolean, boolean)
	 */
	public void paint(Widget parent,GC gc, boolean expanded, boolean hasFocus, boolean hovering) {
		PGC gcPlus = new PGC(gc,location.x,location.y);
		
		Color back = gcPlus.getBackground();
		Color fore = gcPlus.getForeground();
		
        if (!hovering){
            gcPlus.setForeground(parent.getDisplay().getSystemColor(SWT.COLOR_WIDGET_NORMAL_SHADOW));
        } else {
            gcPlus.setForeground(parent.getDisplay().getSystemColor(SWT.COLOR_LIST_SELECTION));
        }
        
        gcPlus.setBackground(gc.getForeground());
        if (expanded){
            gcPlus.drawPolygon( new int[]{1,3,4,6,5,6,8,3} );
            gcPlus.fillPolygon( new int[]{1,3,4,6,5,6,8,3} );
        } else {
            gcPlus.drawPolygon( new int[]{3,1,6,4,6,5,3,8} );
            gcPlus.fillPolygon( new int[]{3,1,6,4,6,5,3,8} );
        }
		
		if (hasFocus){
			gcPlus.setBackground(back);
			gcPlus.setForeground(fore);
			gcPlus.drawFocus(-1,-1,12,12);
		}
		
	}

	/* 
	 * Returns the toggle's size (10,10).
	 * @see com.swtplus.widgets.toggle.IToggleStrategy#getSize()
	 */
	public Point getSize() {
		return new Point(10,10);
	}

	/* (non-Javadoc)
	 * @see com.swtplus.widgets.toggle.IToggleStrategy#setLocation(org.eclipse.swt.graphics.Point)
	 */
	public void setLocation(Point p) {
		location = p;		
	}

	/**
	 * @return Returns the location.
	 */
	public Point getLocation() {
		return location;
	}
	
    
}