Hi, Omar. Cairngorm is primarily designed to help teams of developers build large database-driven Rich Internet Applications for business. It implements patterns and best practices that are designed with that intent. It works very well for this; however---at least without knowing more details about what your app does---I'd be hesitant to recommend using the Cairngorm framework for a drawing application. Others may disagree, but I don't think there's much to be gained (and quite a bit of compactness and clarity to be lost) by using Cairngorm for a single client app like that.
Anyway, the ViewHelper classes are intended to provide the public interface for your View objects. This often means just implementing externally-available getters and setters for variables or functionality on the View. It sounds like maybe you'd be interested in broadcasting events through the Cairngorm EventBroadcaster in response to user interaction. This gives objects in your app a general way to request that some set of steps be taken (for example, drawing of a particular object); also, parameters can be passed along with the broadcast event, for example the id of the object that you want to draw itself and the canvas onto which you'd like that drawing to occur. Then your Command objects can take care of coordinating amongst the objects to accomplish your request. Of course, this can lead to poor designs where more code is in your Commands than should be -- remember to generally try to keep as much of your program logic implemented by the classes which perform that logic as possible. Grady Haynes Senior Systems Engineer, IT Services 817.252.4891 [EMAIL PROTECTED] Practitioners Publishing Company A Thomson Business 801 Cherry Street, Suite 1300 Fort Worth, Texas 76102 ppc.thomson.com -----Original Message----- From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of Omar Ramos Sent: Monday, August 22, 2005 2:52 PM To: [email protected] Subject: [flexcoders] Cairgorm question. Hi again :), I have a question about ViewHelpers again! I know the ViewHelpers are there to massage the Model. But what when I have to invoke difrent events of that specific view from other views? For example I am making a drawing application and I have difrent methods for creating shapes manipulating them ect. These methods need to be called from other views that are deaply nested. Does this scenario justifies the ViewHelper ? So that I can have difrent commands like DrawShapeCommand or DrawRectangleCommand and have each view only dispatch the event to draw a shape? Thanks and sorry for the trubles just trying to use your framework correctly. Omar Ramos System Developer ------------------------ Yahoo! Groups Sponsor --------------------~--> <font face=arial size=-1><a href="http://us.ard.yahoo.com/SIG=12ht76rsg/M=362329.6886308.7839368.151 0227/D=groups/S=1705007207:TM/Y=YAHOO/EXP=1124747494/A=2894321/R=0/SIG=1 1dvsfulr/*http://youthnoise.com/page.php?page_id=1992 ">Fair play? Video games influencing politics. Click and talk back!</a>.</font> --------------------------------------------------------------------~-> -- Flexcoders Mailing List FAQ: http://groups.yahoo.com/group/flexcoders/files/flexcodersFAQ.txt Search Archives: http://www.mail-archive.com/flexcoders%40yahoogroups.com Yahoo! Groups Links ------------------------ Yahoo! Groups Sponsor --------------------~--> <font face=arial size=-1><a href="http://us.ard.yahoo.com/SIG=12hb9uvi2/M=362335.6886445.7839731.1510227/D=groups/S=1705007207:TM/Y=YAHOO/EXP=1124749334/A=2894361/R=0/SIG=13jmebhbo/*http://www.networkforgood.org/topics/education/digitaldivide/?source=YAHOO&cmpgn=GRP&RTP=http://groups.yahoo.com/";>In low income neighborhoods, 84% do not own computers. At Network for Good, help bridge the Digital Divide!</a>.</font> --------------------------------------------------------------------~-> -- Flexcoders Mailing List FAQ: http://groups.yahoo.com/group/flexcoders/files/flexcodersFAQ.txt Search Archives: http://www.mail-archive.com/flexcoders%40yahoogroups.com Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/flexcoders/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
