If you used to work with reflection in other languages like c# or java, you know that getting the object type might be useful. In addition with the operators “is” and “as” that are used to check if an object is a of a specific class or to cast it… Read more »
There are a few options to display images in flash applications. Load directly from code an image file from and url location. Embed the images directly in the as3 code using Embed annotation Import resources in flash and export them as swc files, then use them where you need them.
Here is a little snippet code which adds drag and drop functionality to a sprite object:
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public class MySprite extends Sprite { public function MySprite() : void { addEventListener(Event.ADDED_TO_STAGE, addedToStage); addEventListener(Event.REMOVED_FROM_STAGE, removedFromStage); } private function addedToStage(e : Event) : void { addEventListener(MouseEvent.MOUSE_DOWN, mouseDown); addEventListener(MouseEvent.MOUSE_MOVE, mouseMove); addEventListener(MouseEvent.MOUSE_UP, mouseUp); } protected var moving:Boolean = false; protected var offsetX:int = 0; protected var offsetY:int = 0; private function mouseDown(e : Event) : void { moving = true; offsetX = this.x - parent.mouseX; offsetY = this.y - parent.mouseY; } private function mouseMove(e : MouseEvent) : void { if (moving) { if (e.buttonDown) { this.x = offsetX + parent.mouseX; this.y = offsetY + parent.mouseY; } else { moving = false; } } } private function mouseUp(e : Event) : void { moving = false; } private function removedFromStage(e : Event) : void { removeEventListener(MouseEvent.MOUSE_DOWN, mouseDown); removeEventListener(MouseEvent.MOUSE_MOVE, mouseMove); removeEventListener(MouseEvent.MOUSE_UP, mouseUp); } } |
Download the net.hires.debug.Stats class and copy it in your application source code structure. add a new object to the main sprite object:
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addChild( new Stats() ); |
If you prefer different colors you can add some custom parameters:
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addChild( new Stats( { bg: 0xffffff, fps: 0xff0000, ms: 0x00ff00, mem: 0x0000ff, memmax: 0x0000aa } ) ) |
You can dispatch an event from any class that extends EventDispatcher. That includes Sprite and Movieclip classes. First of all create a custom event class:
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package custom.events { import flash.events.Event; public class CustomEvent extends Event { public function CustomEvent(type:String, bubbles:Boolean=false, cancelable:Boolean=false) { super(type, bubbles, cancelable); } public static const OK:String = "ok_result"; } } |
Here is a little snippet shat shows how to open an url in a new window from as3. If you want to open the link in the same window, simply replace “_blank” parameter with “”;
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import flash.net.URLRequest; import flash.net.navigateToURL; ... navigateToURL(new URLRequest(url), "_blank"); ... |
Here is a simple function which adds a tint effect to a Sprite or MovieClip:
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function extractAlpha(c:uint):uint {return (( c >> 24 ) & 0xFF);} function extractRed(c:uint):uint {return (( c >> 16 ) & 0xFF);} function extractGreen(c:uint):uint {return ( (c >> 8 ) & 0xFF );} function extractBlue(c:uint):uint {return ( c & 0xFF );} public function addTintEffect(sprite:Sprite, color:uint = 0x333333, power:Number = 0.3):void { var red:Number = Math.round( power * extractRed(color) ); var green:Number = Math.round( power * extractGreen(color) ); var blue:Number = Math.round( power * extractBlue(color) ); this.transform.colorTransform = new ColorTransform(1-power, 1-power, 1-power,1, red, green, blue, 0); } |
In an actionscript application we can set the frame rate in main class. We can do the same in flash applications. However the number we set is not necessarily what we really get. Depending on the number of computations that should be done at each frame, the ENTER_FRAME event can… Read more »
When you create AS3 projects in flex builder or other programs you’ll need simple shapes and sprites on the fly. Here is a simple method to create them:
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public static function rectangleSprite(w:Number, h:Number, fillColor:uint , borderColor:uint, center:Boolean = false):Sprite { var rectangleSprite:Sprite = new Sprite(); rectangleSprite.graphics.lineStyle(1, borderColor) rectangleSprite.graphics.beginFill(fillColor); if (center) rectangleSprite.graphics.drawRect(0,0,w,h); else rectangleSprite.graphics.drawRect(-w/2,-h/2,w,h); rectangleSprite.graphics.endFill(); return rectangleSprite; } |
The Array class in actionscript 3 don’t provide a method to remove a specified object. To achieve it we have to search and get the index of the object in the array using indexOf method and to remove it using splice method:
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public static function removeFromArray(obj:Object, arr:Array):void { var index:int = arr.indexOf(obj); if (index >= 0) arr.splice(index,1); } |