Re: [flexcoders] Need advice on which Event I should be using -
you can do away with the conventional [bindable] metatag for binding your dataprovider and use getter-setter instead with a custom flexevent triggered everytime the setter is called. or just use the valuecommit event. just make sure you dont include another value-commit-triggering action (such as setting another data provider) in the listener. --- Mike Anderson [EMAIL PROTECTED] wrote: Hello All, I have a Cairngorm application containing a DataGrid, in which the Grid's dataProvider is bound to an ArrayCollection (comprised of ValueObjects) located in the ApplicationModel. Whenever I want to add a new record to the dataProvider, I first create a new ValueObject instance, then populate it using a Details Form. Of course, being a Cairngorm-based app, I dispatch a Cairngorm Event containing the ValueObject (which causes it to be sent off to the server), and then wait for the onResult response from the server. Obviously, I can't go blindly adding the new Record to the dataProvider, until I know for sure that I get a valid onResult response from the server. Now assuming that I DO get my onResult event, what I do then is add the ValueObject to the model's ArrayCollection using the addItemAt() method, inserting the ValueObject at Index Zero so it gets pushed to the top. This way, all newly created records appear at the top of the DataGrid (which is exactly what I want to happen). This is where things get fuzzy... Which Event should I have the DataGrid listen to, so that it gets scrolled to the very top, *ONLY* when a new record gets added to it's dataProvider? This is a case, where I'd actually prefer dispatching a Custom Event, so that I can manually dispatch it from the same Cairngorm Command Class handling the onResult Event - but I don't know if that is possible. I don't know yet, if I can dispatch events which get broadcasted across multiple controls. This is where I have a lot to learn, regarding the Event Model... If any of you could help me with this, I'd be very grateful for your help. Thanks in advance for everything, Mike Need a quick answer? Get one in minutes from people who know. Ask your question on www.Answers.yahoo.com
RE: [flexcoders] Need advice on which Event I should be using -
Personally instead of directly binding to the Array collection inside the model for your data grid, I'd register the parent the grid belongs to to the event that will fire based on a change in the model and inside that event I'd populate your data grid with the contents of the model and scroll it to the top. I think binding data directly to your models has some advantages but it also has some pitfalls when you want to do more than just bind to data, its also hell to debug. Jesse Warden has a good example of binding in the trenches - http://www.jessewarden.com/archives/2006/07/binding_in_the.html Grant. ... b l u e t u b e i n t e r a c t i v e. .: grant davies .: 404.428.6839 (c) .: 708-983-1577 (F) [EMAIL PROTECTED] http://www.bluetube.com/bti http://www.bluetube.com/bti A Tribal Chicken Designs Affiliate http://www.tribalchicken.com/ From: flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of leds usop Sent: Thursday, January 11, 2007 3:34 AM To: flexcoders@yahoogroups.com Subject: Re: [flexcoders] Need advice on which Event I should be using - you can do away with the conventional [bindable] metatag for binding your dataprovider and use getter-setter instead with a custom flexevent triggered everytime the setter is called. or just use the valuecommit event. just make sure you dont include another value-commit-triggering action (such as setting another data provider) in the listener. --- Mike Anderson [EMAIL PROTECTED] mailto:mike%40anderson.net wrote: Hello All, I have a Cairngorm application containing a DataGrid, in which the Grid's dataProvider is bound to an ArrayCollection (comprised of ValueObjects) located in the ApplicationModel. Whenever I want to add a new record to the dataProvider, I first create a new ValueObject instance, then populate it using a Details Form. Of course, being a Cairngorm-based app, I dispatch a Cairngorm Event containing the ValueObject (which causes it to be sent off to the server), and then wait for the onResult response from the server. Obviously, I can't go blindly adding the new Record to the dataProvider, until I know for sure that I get a valid onResult response from the server. Now assuming that I DO get my onResult event, what I do then is add the ValueObject to the model's ArrayCollection using the addItemAt() method, inserting the ValueObject at Index Zero so it gets pushed to the top. This way, all newly created records appear at the top of the DataGrid (which is exactly what I want to happen). This is where things get fuzzy... Which Event should I have the DataGrid listen to, so that it gets scrolled to the very top, *ONLY* when a new record gets added to it's dataProvider? This is a case, where I'd actually prefer dispatching a Custom Event, so that I can manually dispatch it from the same Cairngorm Command Class handling the onResult Event - but I don't know if that is possible. I don't know yet, if I can dispatch events which get broadcasted across multiple controls. This is where I have a lot to learn, regarding the Event Model... If any of you could help me with this, I'd be very grateful for your help. Thanks in advance for everything, Mike __ Need a quick answer? Get one in minutes from people who know. Ask your question on www.Answers.yahoo.com attachment: small.jpg
[flexcoders] Need advice on which Event I should be using -
Hello All, I have a Cairngorm application containing a DataGrid, in which the Grid's dataProvider is bound to an ArrayCollection (comprised of ValueObjects) located in the ApplicationModel. Whenever I want to add a new record to the dataProvider, I first create a new ValueObject instance, then populate it using a Details Form. Of course, being a Cairngorm-based app, I dispatch a Cairngorm Event containing the ValueObject (which causes it to be sent off to the server), and then wait for the onResult response from the server. Obviously, I can't go blindly adding the new Record to the dataProvider, until I know for sure that I get a valid onResult response from the server. Now assuming that I DO get my onResult event, what I do then is add the ValueObject to the model's ArrayCollection using the addItemAt() method, inserting the ValueObject at Index Zero so it gets pushed to the top. This way, all newly created records appear at the top of the DataGrid (which is exactly what I want to happen). This is where things get fuzzy... Which Event should I have the DataGrid listen to, so that it gets scrolled to the very top, *ONLY* when a new record gets added to it's dataProvider? This is a case, where I'd actually prefer dispatching a Custom Event, so that I can manually dispatch it from the same Cairngorm Command Class handling the onResult Event - but I don't know if that is possible. I don't know yet, if I can dispatch events which get broadcasted across multiple controls. This is where I have a lot to learn, regarding the Event Model... If any of you could help me with this, I'd be very grateful for your help. Thanks in advance for everything, Mike
