| << Chapter < Page | Chapter >> Page > |
Listing 7 also signals the end of the class and the end of the program.
I encourage you to run this program from the web. Then copy the code from Listing 8 through Listing 10. Use that code to create an ActionScriptproject and a Flex project. Compile and run the projects. Experiment with the code, making changes, and observing the results of your changes.Make certain that you can explain why your changes behave as they do.
I will publish a list containing links to ActionScript resources as a separate document. Search for ActionScript Resources in the Connexions searchbox.
Complete listings of the source code for the two programs discussed in this lesson are provided below.
/*********************************************************
* Bitmap03 11/29/09* Can be run as an ActionScript project. However, some
* changes are required to convert it to a Flex project.*
* For some reason, the size and position of the 100x100* pixel red square depends on the size and the height to
* width ration of the browser window.*********************************************************/
package {import flash.display.Sprite
import flash.display.Bitmap;import flash.display.BitmapData;public class Bitmap03 extends Sprite {
public function Bitmap03(){//Create a BitmapData object with a red opaque
// background.var bitmapData:BitmapData =
new BitmapData(100, 100, false, 0xFF0000);//Draw a yellow cross on the backgroundvar yellow:uint = 0xFFFF00;
for(var cnt:uint = 0; cnt<100; cnt++){
bitmapData.setPixel(cnt, cnt, yellow);bitmapData.setPixel(100 - cnt, cnt, yellow);
} //end for loop//Encapsulate the bitmap data into a new Bitmap// object and add it to the display. For some
// reason, the red square displays as 50x50 instead// of 100x100.
var bitmapObj:Bitmap = new Bitmap(bitmapData);addChild(bitmapObj);
} //end constructor} //end class
} //end package <?xml version="1.0" encoding="utf-8"?><!--Bitmap04
--><mx:Application
xmlns:mx="http://www.adobe.com/2006/mxml"xmlns:cc="CustomClasses.*"><cc:Driver/></mx:Application> /*********************************************************
* Bitmap04 11/29/09* This is an update to Bitmap03 to make it possible to
* compile and run it as a Flex project. Unlike Bitmap03* the red square produced by this program displays at the
* correct size of 100x100 pixels.*********************************************************/
package CustomClasses{import mx.containers.VBox;
import flash.display.Bitmap;import flash.display.BitmapData;
import mx.core.UIComponent;public class Driver extends VBox{//Note that this class extends Sprite, nothing shows
// on the display. Therefore it extends VBox instead.public function Driver(){
//Prepare the display area. This is window dressing.setStyle("backgroundAlpha",1.0);
setStyle("backgroundColor",0x00FFFF);width = 150;
height = 150;//Create a BitmapData object with a red opaque// background.
var bitmapData:BitmapData =new BitmapData(100, 100, false, 0xFF0000);//Draw a yellow cross on the background
var yellow:uint = 0xFFFF00;for(var cnt:uint = 0; cnt<100; cnt++){
bitmapData.setPixel(cnt, cnt, yellow);bitmapData.setPixel(100 - cnt, cnt, yellow);
} //end for loop//Encapsulate the bitmap data into a new Bitmap// object and add it to the display.var bitmapObj:Bitmap = new Bitmap(bitmapData);//The following is necessary because the Bitmap
// class is not a subclass of UIComponent.var uiComponent:UIComponent = new UIComponent();
uiComponent.addChild(bitmapObj);addChild(uiComponent);
} //end constructor} //end class
} //end package This section contains a variety of miscellaneous materials.
-end-
Notification Switch
Would you like to follow the 'Object-oriented programming (oop) with actionscript' conversation and receive update notifications?
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|