Solved

In Flex/Actionscript, I am using an <mx:MenuBar> component.  How do I register/respond to a user clicking on a submenu item that itself has another submenu (ie. children)?

Posted on 2008-06-11
6
4,648 Views
Last Modified: 2011-10-03
In Flex/Actionscript, I am using an <mx:MenuBar> component which has 3 to 4 levels of submenus.  How do I register/respond to a user clicking on a submenu item that itself has another submenu (ie. children)?  The "itemClick" event seems to only respond to submenu items that have no children (ie. descendants).  But I need to be able to register a click/selection on submenu items at all levels, not just the end children.
<mx:MenuBar id="mainMenuBar" itemClick="handleSubMenuBarClickEvent(event);">
</mx:MenuBar>

Open in new window

0
Comment
Question by:robbersrow
  • 4
  • 2
6 Comments
 
LVL 5

Expert Comment

by:maclema
ID: 21792446
Here is one way to accomplish this.

On roll over of each item, add a click listener to the item rolled over..
<mx:MenuBar x="10" y="10" dataProvider="{menudp.item}" labelField="@name" itemRollOver="handleItemRollOver(event)"></mx:MenuBar>
 
private function handleItemRollOver(e:MenuEvent):void {
	//add click listener's to the actual MenuBar items.
	if ( e.itemRenderer is MenuBarItem ) {
		var item:MenuBarItem = MenuBarItem(e.itemRenderer);
		if ( !item.hasEventListener(MouseEvent.CLICK) ) {
			item.addEventListener(MouseEvent.CLICK, handleItemClick);
		}
	}
	//add listeners to the menu items
	else {
		var renderer:MenuItemRenderer = MenuItemRenderer(e.itemRenderer);
		if ( !renderer.hasEventListener(MouseEvent.CLICK) ) {
			renderer.addEventListener(MouseEvent.CLICK, handleItemClick);
		}
	}
}
 
private function handleItemClick(e:MouseEvent):void {
	var item:* = e.currentTarget;
	trace(item.data);
}

Open in new window

0
 

Author Comment

by:robbersrow
ID: 21881634
Thank you for your response, and sorry for my delay in getting back to you.  I tested this, and I think this solution is almost complete, but still missing the final step.  I can get the MenuBar to register the MouseEvent.CLICK both on the main menu items and sub menu items. But then there is a problem at the next step, when inside the "handleItemClick" function.  The "item.data" statement does not get me the actual "data" property of the "menuitem" from the dataprovider.  I need to be able to access properties of the submenu "menuitem" that was clicked (ie. data, label, type, children).  An example of this is in the code below, and you can see how i need to access particularly the "data" property to figure out which value to pass to the next page.
<menuitem label="MenuItem 1" data="1">
    <menuitem label="MenuItem 1-A" data="100"/>
    <menuitem label="MenuItem 1-B" data="101"/>
    <menuitem label="MenuItem 1-C" data="102"/>
</menuitem>
<menuitem label="MenuItem 2" data="2">
    <menuitem label="MenuItem 2-A" data="200"/>
    <menuitem label="MenuItem 2-B" data="201"/>
    <menuitem label="MenuItem 2-C" data="202"/>
</menuitem>
 
//OR as I am implementing the dataProvider through an ArrayCollection
 
public var menuBarArrayCollection:ArrayCollection = new ArrayCollection([
{label:"Power", data:3, children:[
    {label:"Classic", data:212},
    {label:"Gripper", data:201, children:[
        {label:"Gripper 1", data:204}, 
        {label:"Gripper 2", data:205}, 
        {label:"Gripper 3", data:206}
    ]}
]);

Open in new window

0
 
LVL 5

Accepted Solution

by:
maclema earned 500 total points
ID: 21882564
Here is what I tried, and I can access all the properties.
<mx:Script>
	<![CDATA[
		import mx.controls.menuClasses.MenuItemRenderer;
		import mx.controls.menuClasses.MenuBarItem;
		import mx.events.MenuEvent;
		import mx.collections.ArrayCollection;
		
		public var menuBarArrayCollection:ArrayCollection = 
		new ArrayCollection([
			{label:"Power", data:3, 
				children:[
			    	{label:"Classic", data:212},
			    	{label:"Gripper", data:201, 
			    		children:[
			        		{label:"Gripper 1", data:204}, 
			        		{label:"Gripper 2", data:205}, 
			        		{label:"Gripper 3", data:206}
			    		]
			    	}
			    ]
			}
		]);
		
		private function handleItemRollOver(e:MenuEvent):void {
	        //add click listener's to the actual MenuBar items.
	        if ( e.itemRenderer is MenuBarItem ) {
	                var item:MenuBarItem = MenuBarItem(e.itemRenderer);
	                if ( !item.hasEventListener(MouseEvent.CLICK) ) {
	                        item.addEventListener(MouseEvent.CLICK, handleItemClick);
	                }
	                item.invalidateProperties();
	        }
	        //add listeners to the menu items
	        else {
	                var renderer:MenuItemRenderer = MenuItemRenderer(e.itemRenderer);
	                if ( !renderer.hasEventListener(MouseEvent.CLICK) ) {
	                        renderer.addEventListener(MouseEvent.CLICK, handleItemClick);
	                }
	                renderer.invalidateProperties();
	        }
	}
	 
	private function handleItemClick(e:MouseEvent):void {
	        var item:* = e.currentTarget;
	        trace(item.data.children);
	        trace(item.data.label);
	        trace(item.data.data);
	}
	]]>
</mx:Script>

Open in new window

0
Are your AD admin tools letting you down?

Managing Active Directory can get complicated.  Often, the native tools for managing AD are just not up to the task.  The largest Active Directory installations in the world have relied on one tool to manage their day-to-day administration tasks: Hyena. Start your trial today.

 

Author Closing Comment

by:robbersrow
ID: 31466069
This worked perfectly!  Thank you for your solution.
0
 

Author Comment

by:robbersrow
ID: 21886621
For some reason, now when I roll over the main menuBar items (not the submenu items), the background skin/color is not applied.  Do you have any idea why this might be the case?  Any suggestions would be greatly appreciated.  Thanks again for your help with this issue.
0
 

Author Comment

by:robbersrow
ID: 21886936
Please ignore my last post, I figured it out.  It was the "invalidateProperties()" method that was causing the issue.  I removed the method and it seems to work fine now.  Thanks.
0

Featured Post

Optimizing Cloud Backup for Low Bandwidth

With cloud storage prices going down a growing number of SMBs start to use it for backup storage. Unfortunately, business data volume rarely fits the average Internet speed. This article provides an overview of main Internet speed challenges and reveals backup best practices.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Writing .htaccess to redirect only the index page 3 88
Prevent SQL Injection 4 113
How to handle PHP $_POST requests 4 65
Reason for High TTFB 1 63
Foreword (May 2015) This web page has appeared at Google.  It's definitely worth considering! https://www.google.com/about/careers/students/guide-to-technical-development.html How to Know You are Making a Difference at EE In August, 2013, one …
These days, all we hear about hacktivists took down so and so websites and retrieved thousands of user’s data. One of the techniques to get unauthorized access to database is by performing SQL injection. This article is quite lengthy which gives bas…
This video teaches viewers how to create their own website using cPanel and Wordpress. Tutorial walks users through how to set up their own domain name from tools like Domain Registrar, Hosting Account, and Wordpress. More specifically, the order in…
Use Wufoo, an online form creation tool, to make powerful forms. Learn how to choose which pages of your form are visible to your users based on their inputs. The page rules feature provides you with an opportunity to create if:then statements for y…

809 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question