topical media & game development
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#graphic-flex-image-effects-01-Flex-DrawingBitmapStrokes.ax

#graphic-flex-image-effects-01-Flex-DrawingBitmapStrokes.ax [swf] [flash] flex 


  package {
  
          import flash.display.BitmapData;
          import flash.display.Shape;
          import flash.display.Sprite;
          import flash.events.MouseEvent;
  
          [SWF(width=550, height=400, backgroundColor=0xFFFFFF)]
Creates a bitmap to use as the fill for drawing API lines. 

  
          public class @ax-graphic-flex-image-effects-01-Flex-DrawingBitmapStrokes extends Sprite {
Constructor. Sets up stage listener. 

  
                  public function @ax-graphic-flex-image-effects-01-Flex-DrawingBitmapStrokes() {
                          stage.addEventListener(MouseEvent.MOUSE_DOWN, onStageMouseDown);
                          stage.addEventListener(MouseEvent.MOUSE_UP, onStageMouseUp);
                  }
Creates the bitmap data that will be used for the lines. 

  
                  private function createBrushStroke():void {
                          // generate random radius
                          var radius:uint = Math.random()*10 + 2;
                          var diameter:uint = radius*2;
                          // draw a circle that can be tiled
                          var shape:Shape = new Shape();
                          shape.graphics.beginFill(Math.random()*0xFFFFFF);
                          shape.graphics.drawCircle(radius, radius, radius);
                          shape.graphics.endFill();
                          // draw the shape into bitmap data
                          var brushStroke:BitmapData = new BitmapData(diameter, diameter, true, 0x00000000);
                          brushStroke.draw(shape);
                          // use the circle's radius as thickness and bitmap as the fill
                          graphics.lineStyle(diameter);
                          graphics.lineBitmapStyle(brushStroke);
                  }
Handler for when the stage is clicked. This sets up a new bitmap to be used for drawing and sets up a listener for when the mouse moved.
parameter: event Event dispatched by stage. 

  
                  private function onStageMouseDown(event:MouseEvent):void {
                          createBrushStroke();
                          graphics.moveTo(stage.mouseX, stage.mouseY);
                          stage.addEventListener(MouseEvent.MOUSE_MOVE, onStageMouseMove);
                  }
Handler for when the mouse is released on the stage. This removes the listener for when the mouse moved.
parameter: event Event dispatched by stage. 

  
                  private function onStageMouseUp(event:MouseEvent):void {
                          stage.removeEventListener(MouseEvent.MOUSE_MOVE, onStageMouseMove);
                  }
Handler for when the mouse is moved on the stage. Draws a line to the new mouse position.
parameter: event Event dispatched by stage. 

  
                  private function onStageMouseMove(event:MouseEvent):void {
                          graphics.lineTo(stage.mouseX, stage.mouseY);
                          event.updateAfterEvent();
                  }
  
          }
  
  }
[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _

(C) Æliens 04/09/2009

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