Ah yes, it gets a little more complicated if the button is in a different view than the video. If you weren't using Cairngorm, I would suggest dispatching a custom button event that is listened for in the video view. Then take the snapshot and pass the data. The idea with Cairngorm is to make the views reusable and avoid coupling to other views. The Cairngorm gurus would probably suggest the following approach.
Create a Boolean variable in the ModelLocator called takeSnapshot. On the button click event, dispatch an event-command that updates the variable to true. In the video view use an ObserveValue tag to listen for the change of the takeSnapshot variable to true. The ObserveValue tag handler function would then take the snapshot of the video and dispatch the CairngormEvent (with the bitmapData). I still recommend that you store the bitmapData in the ModelLocator and bind the data to the snapshot view.
By following this approach, the child views don't care about their parents and are able to be reused elsewhere. You could, of course, do it the way that you mentioned. But I think that the way described above is more in line with best practices. I hope that this gives you some ideas.
-TH
__________________________________
Tim Hoff
Cynergy Systems, Inc.
http://www.cynergysystems.com
Office: 866-CYNERGY
--- In [email protected], "gdoucen" <[EMAIL PROTECTED]> wrote:
>
> Thanks Tim for your answer but my problem come from the way i can
> gather all the data from differents views in a sole custom event. I
> agree with you for the rest.
> My button which trigger the event is in a separate view than the video
> display i want to take a snapshot. Of course here the problem is
> simple but i want to generalize it.
>
> I think that i was complicating the problem by trying to lead the
> event to the view that have the videodisplay which then send the custo
> event to the command.
>
> A better way is to simply confide in the parent container of the two
> view to send itself the custom event to the command cause it have
> access to the data all the view.
>
> <!-- my composite view -->
> <mx:VBox ...>
> <mx:Script>
> <![CDATA[
>
> private function handleTakeASnapshot(event:snapshotOrderEvent):void
> {
> // Trigger the final event to the command
> var snapshotVo:SnapshotVO = new SnapshotVO();
> snapshotVo.image = view1.getSnapshot();
> var doSnapshotEvent:DoSnapshotEvent = new DoSnapshotEvent(
> snapshotVo );
> CairngormEventDispatcher.getInstance().dispatchEvent(
> doSnapshotEvent );
> }
>
> ]]>
> </mx:Script>
> <view:view1 id="view1" />
> <view:view1 id="view2" myInititialEvent="handleTakeASnapshot(event)" />
> </mx:VBox>
>
> It 's correct and clean like that?. If i'm wrong tell me cause i'm a
> newbie with flex and cairngorm and i want to get the good reflex.
>
> Thanks again
>
> --- In [email protected], "Tim Hoff" TimHoff@ wrote:
> >
> >
> > Hi,
> >
> > Usually, if you're dealing with moving data around a Cairngorm
> > application, you would create a public variable (or VO) in the
> > ModelLocator. When you take a snapshot of the video, dispatch a
> > CairngormEvent that contains the bitmapData (I would do this in the
> > view's script; not a ViewHelper). In the command, update the variable
> > in the ModelLocator with the data. Now you have the data in a centrally
> > located position. If another view needs access to this data, simply
> > bind the view's control to the variable in the ModelLocator. As soon as
> > the variable is updated by the command, the second view will
> > automatically reflect the change.
> >
> > This is a simple explanation and may not fit your particular use case.
> > But hopefully it will give you some ideas.
> >
> > -TH
> > __________________________________
> >
> > Tim Hoff
> > Cynergy Systems, Inc.
> > http://www.cynergysystems.com
> > Office <http://www.cynergysystems.comOffice> : 866-CYNERGY
> >
> >
> >
> > --- In [email protected], "gdoucen" <gdoucen@> wrote:
> > >
> > > Hi,
> > >
> > > My problem is the following.
> > >
> > > I use cairngorm framework.
> > > I have two views. the button in one view triggers an event that need
> > > to get data from the other view. In my case, i take a snapshot of the
> > > video so here i need the bitmap data.
> > >
> > > I see two solutions.
> > >
> > > First, using viewhelper/viewLocator to get the data from the dedicated
> > > view inside the command class.
> > >
> > > I know that viewhelper are mostly not recommended by cairngorm in the
> > > opposite side when it's used to set views from commands but here.
> > >
> > > Secondly, use the parent of the two views to transmit the event from
> > > view1 to view2 that send the final event.
> > >
> > > The structure could be as below
> > >
> > > <!-- my composite view -->
> > > <mx:VBox ...>
> > > <mx:Script>
> > > <![CDATA[
> > >
> > > private function handleMyEvent(event:MyCustomEvent):void
> > > {
> > > // Trigger the final event after filling up with the data
> > > view1.sendEvent(event);
> > > }
> > >
> > > ]]>
> > > </mx:Script>
> > > <view:view1 id="view1" />
> > > <view:view1 id="view2" myInititialEvent="handleMyEvent(event)" />
> > > </mx:VBox>
> > >
> > > What is the best way to do that?
> > >
> > > If the action was triggered from the view that hold the needed
> > > informations, i could have passed the data into a custom event that
> > > could be directly read by the command...
> > >
> > > I have browse the forum without success to get informations on this
> > > subject. Feel free to redirect me or give me an answer.
> > >
> > > Thanks
> > >
> >
>
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