PREPARING AND BUILDING ADS - Flash Advertising

Graphics Reference

In-Depth Information

property of a Sprite to create an invisible button that covers the stage

as in Example 3.3. Note that I also included the ClickTagger class we

discussed earlier and that this is an example of timeline code.

EXAMPLE 3.3

Creating an invisible button

import flash.display.Sprite;

import com.flashadbook.utils.ClickTagger;

var fallBackUrl:String = “ http://www.flashadbook.com ” ;

var clickTagger:ClickTagger = new

ClickTagger(stage.loaderInfo);

var myBtn:Sprite = new Sprite();

var lineThickness:int = 1;

myBtn.graphics.lineStyle(lineThickness, 0x000000);

myBtn.graphics.beginFill(0x000000, 0);

myBtn.graphics.drawRect(0, 0, stage.stageWidth-

lineThickness, stage.stageHeight-lineThickness);

clickTagger.assignClickTag(myBtn,fallBackUrl,1);

addChild(myBtn);

InExample3.3,thefirstfewthingswedoaretocreateanew

instance of ClickTagger, a Sprite named myBtn , and an int called

lineThickness . Next, we use the graphics property of the Sprite to

draw a rectangle that has a black outline and a transparent fill.

This is done with lineStyle , beginFill ,and drawRect .Whenwe

use the drawRect method here, the first two parameters represent

the x and y coordinates of the upper-left corner of our button,

whereas the second two parameters represent their width

and height. The reason for subtracting lineThickness from the

stageWidth and stageHeight is because the button will actually be

drawn exactly to the edge of the stage and that ends up putting the

right and bottom of the border outside of the visible area. So that

'

s

it. There

s not a lot to it, and you can easily move this chunk of

code from banner to banner. You could carry this a little further

and create a BorderButton class as in Example 3.4.

'

EXAMPLE 3.4

The BorderButton class

package com.flashadbook.display {

import flash.display.DisplayObjectContainer;

import flash.display.Sprite;

import flash.events.MouseEvent;

import flash.net.URLRequest;

import flash.net.navigateToURL;

import flash.external.ExternalInterface;

import flash.system.Capabilities;

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