gistfile1.java

import org.pushingpixels.trident.Timeline.RepeatBehavior

application(title:'snake',
  size:[400,220],
  locationByPlatform:true,
  iconImage: imageIcon('/griffon-icon-48x48.png').image,
  iconImages: [imageIcon('/griffon-icon-48x48.png').image,
               imageIcon('/griffon-icon-32x32.png').image,
               imageIcon('/griffon-icon-16x16.png').image]) {
   delegate.registerFactory("gfxpanel", new GfxPanelFactory())
   gfxpanel(id: "canvas", preferredSize: [400,200], animate: false) {
     group(borderColor: "none", fill: color("black")) {
       (0..<20).each { i ->
         (0..<10).each { j ->
           def rect = rect(x: i*20, y: j*20, w: 20, h: 20)
           rect.props.timeline = timeline(rect, duration: 2500) {
             interpolatedProperty("fill", from: color("yellow"), to: color("black"))
           }
           rect.props.rollover = false
           rect.mouseExited = {rect.props.rollover = false}
           rect.mouseEntered = {
              if(rect.props.rollover) return
              rect.props.rollover = true
              rect.props.timeline.replay()
           }
         }
       }
     }
   }
   swingRepaintTimeline(canvas).playLoop(RepeatBehavior.LOOP)
}