Re: [flexcoders] sending arguments to addEventListener

Aly Sidi Sun, 02 Oct 2005 00:51:12 -0700

hey face7Hill
i dont think you can pass arguments to an eventlistner, only function pointers..so in your nextButton.addEventListener( "click",
goToScreen(screen2)); the screen2 parameter is never getting passed.
If you want to invoke this function from code then I think you have to use teh dispatchEvent command, but if you want the user to click and have it dispatched then you can switch on the button ID and then prceed to which ever screen. So instead of passing teh screen name, just use teh button name as a reference
OR
create a new function pointer for each button click

take alook at this and read up on delegates and events

http://www.actionscript.org/tutorials/beginner/the_delegate_class/index.shtml <--shows the first approach outlined above

On 10/1/05, face7hill <[EMAIL PROTECTED]> wrote:

I'm trying to create a wizard based application.  I'm having trouble
sending arguments to my "back" and "next" buttons using
addEventListener.

Basically, when my app loads, in the viewstack, the second screen is
loaded, i.e. it loads before the user gets a chance to hit the next
button.  I'm trying to have it load the first screen and then go to
the
second screen after the user presses the next button.

Anyone see what I'm doing wrong?

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.macromedia.com/2003/mxml"
        height="100%"
        width="100%"
        >

<mx:Script>
<![CDATA[

function initialize(screenx){
        switch(screenx){
                case screen1:
                        mainPanel.title = "screen1";
                        statusLabel.text = "screen1";
                        backButton.visible = false;

                        backButton.label = "Back";
                        nextButton.label = "Start";
                        nextButton.addEventListener( "click",
goToScreen(screen2));
                        break;

                case screen2:
                        mainPanel.title = "screen2";
                        statusLabel.text = "screen2";
                        backButton.visible = true;

                        backButton.label = "Back";
                        nextButton.label = "Next";
                        nextButton.addEventListener( "click",
goToScreen(screen3));
                        break;

                case screen3:
                        mainPanel.title = "screen3";
                        statusLabel.text = "screen3";
                        backButton.visible = true;

                        backButton.label = "Back";
                        nextButton.label = "Next";
                        nextButton.addEventListener( "click",
goToScreen(screen1));
                        break;
        }
}

function goToScreen(x){
        mainViewStack.selectedChild = x;

}

]]>
</mx:Script>

        
        <mx:Panel id="mainPanel" title="" width="100%" height="100%"
styleName="mainPanel">
                
                <mx:ViewStack id="mainViewStack" width="100%"
height="100%">

                        
                        <mx:VBox id="screen1" width="100%"
height="100%" creationComplete="initialize(screen1);">

                                <mx:Text text="This is screen1."
width="100%"/>
                        </mx:VBox>

                        
                        <mx:VBox id="screen2" width="100%"
height="100%" creationComplete="initialize(screen2);">
                                <mx:Text text="This is screen2."
width="100%"/>
                        </mx:VBox>

                        
                        <mx:VBox id="screen3" width="100%"
height="100%" creationComplete="initialize(screen3);">
                                <mx:Text text="This is screen3."
width="100%"/>
                        </mx:VBox>

                </mx:ViewStack>
                
                        
                        <mx:ControlBar>
                                        <mx:HBox width="50%"
horizontalAlign="left">
                                                <mx:Label
id="statusLabel" text="" width="200"/>
                                        </mx:HBox>
                                        <mx:HBox width="50%"
horizontalAlign="right">
                                                <mx:Button
id="backButton" label="Back" click="" />
                                                <mx:Button
id="nextButton" label="Next" click="" />
                                        </mx:HBox>
                        </mx:ControlBar>
                </mx:Panel>
                
</mx:Application>

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Re: [flexcoders] sending arguments to addEventListener

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