Ah - yes - this looks pretty cool! I'll start digging into it immediately. Thanks for the reference!!
--- In [email protected], "Jake Churchill" <j...@...> wrote: > > I would separate the classname out into another argument in your XML, so in > your example that's not working, you'd have: > > > > <menuitem id="OpenAlertsWindowMenuOption" label="Open Alerts Window" > callbackClass="ProjectProperties" callback="setValue" > arguments="ShowAlertsWindow, true" /> > > > > Then you'd have to dynamically instantiate that class and call the assigned > method. I have a couple tutorials on my blog about doing this: > > > > http://jake.cfwebtools.com/2009/04/08/dynamically-instantiate-a-class/ > > http://jake.cfwebtools.com/2009/05/15/flex-dynamic-casting-of-data/ > > > > The 2nd one deals with data casting which might not be as relevant but I > still do the class stuff dynamically. Here's an example of what this might > look like for you: > > > > var className:Class = Class( getDefinitionByName( getQualifiedClassName( > "ProjectProperties" ) ) ); > > var function:Function = className["setValue"]; > > function.call(className[or null], parmaters.); > > > > FYI, this code is completely untested, just trying to give you an idea. > > > > Jake Churchill > > CF Webtools > > 11204 Davenport, Ste. 100 > > Omaha, NE 68154 > > http://www.cfwebtools.com > > 402-408-3733 x103 > > > > From: [email protected] [mailto:[email protected]] On > Behalf Of edlueze > Sent: Tuesday, May 19, 2009 6:00 AM > To: [email protected] > Subject: [flexcoders] Call a Flex Function by Name > > > > > > > > > I'm using a Menu control. Normally I'd catch the Menu's control event and > then act on whatever selection the user made with something like a switch > block. > > But I wanted to see if I could be more clever and embed the function name > and parameters in the XML Menu data provider itself, like this: > > <mx:XML id="xmlFormMenuOptions" > > <Menu id="MenuOptions"> > <menuitem id="AddNewChartMenuOption" label="Add Chart..." > callback="AddNewChartButton_click" arguments="" /> > <menuitem id="RenameChartMenuOption" label="Rename Chart..." > callback="PopUpTextBox" arguments="RenameChart, RenameChartButtonTextBox, > {nameChartSelected}" enabled="{selectedChartingPanelTableCell}" /> > <menuitem id="DeleteChartMenuOption" label="Delete Chart" > callback="PopUpCheckBox" arguments="DeleteChart, DeleteChartButtonCheckBox" > enabled="{selectedChartingPanelTableCell}" /> > <menuitem id="RaiseChartOrderMenuOption" label="Raise Chart Order" > callback="RaiseChartOrderButton_click" arguments="" > enabled="{RaiseChartOrderButton.enabled}" /> > <menuitem id="LowerChartOrderMenuOption" label="Lower Chart Order" > callback="LowerChartOrderButton_click" arguments="" > enabled="{LowerChartOrderButton.enabled}" /> > <menuitem id="OpenAlertsWindowMenuOption" label="Open Alerts Window" > callback="ProjectProperties.setValue" arguments="ShowAlertsWindow, true" /> > <menuitem id="ChartingPanelWhatAmIMenuOption" label="What am I?" > callback="PopUpMessage" arguments="ChartingPanelWhatAmIMenuOption, null " /> > <menuitem id="HelpMenuOption" label="Help" callback="" /> > </Menu> > </mx:XML> > > If you look at each <menuitem/> you'll see a 'callback' attribute and an > 'arguments' attribute. The arguments are comma-delineated that I need to > parse into an Array and scrub: for example, by converting string references > into real ones like this: > > if( this.hasOwnProperty(arg) ) > arrayArguments[i] = this[arg]; > > I then have been successful in using the callLater function like this: > > callLater(this[callback], arrayArguments); > > So far so good - it works great! > > But I've hit a tiny snag. If the function is in a foreign class then > everything falls apart. For example, this won't work: > > callback = "ProjectProperties.setValue" > arguments = "ShowAlertsWindow, true" > > Because there is no such thing as this[ProjectProperties.setValue] the > callLater function can't handle it. I can easily build a little stub but I'm > hoping to keep things clean and elegant. > > I've been searching for a way to call-by-name in Flex but haven't found one > (except for callLater). Is there a way I can do this? >
