Hi Martin, Here is the scenario:
I have a select box which is populated with a list of entries (ListItems in this case). Every ListItem has an associated display string and value. I am trying to create a bidirectional binding between on the value of the selected element and the bound variable. Before the change in the API, I could bind the variable to the value property of the select box. With the new API however, I can't do this anymore and I need to supply an array containing the ListItem which I need selected to set the selection property. The ideal solution for me would be some way of automatically having this conversion from value to its associated ListItem and vice versa for the reverse binding. Thanks Eric -----Original Message----- From: Martin Wittemann [mailto:[email protected]] Sent: Friday, May 15, 2009 3:19 AM To: qooxdoo Development Subject: Re: [qooxdoo-devel] Bidirectional binding with array element Hello Eric, on which widget are you using the new selection API? Could you supply some more details on your issue, please? Perhaps I can have a suggestion on how i would solve this after i did understand the whole problem / context. Best, Martin Am 14.05.2009 um 18:40 schrieb Dacquay, Eric: > Hi Martin, > > The fix worked correctly but ever since the change to the form API, > I've > been having some issues with this. The original code was bound to the > value property which is what was in the model. However, the new > selection API uses the selection property which wants an array of > Widgets instead of the value. I have thought that I might be able to > get around this by using a converter but it seems to me like there > might > be a lot of almost identical code. Is this something of which you are > aware? > > I see that the demos have been updated to use the new form API but > there > are no demos which do what I am trying to do. I would appreciate any > suggestions you might have as to how best approach this. > > Thanks > > Eric > > -----Original Message----- > From: Martin Wittemann [mailto:[email protected]] > Sent: Wednesday, May 06, 2009 3:11 AM > To: qooxdoo Development > Subject: Re: [qooxdoo-devel] Bidirectional binding with array element > > Hello Eric, > > looks like this is a bug in the single value binding. Thanks for the > report! > I have opened a bug for that issue: > http://bugzilla.qooxdoo.org/show_bug.cgi?id=2339 > > In fact I already have fixed it. If SourceForge is back i'll commit it > to the trunk. > > Best, > Martin > > Am 05.05.2009 um 16:46 schrieb Dacquay, Eric: > >> Hi Martin, >> >> Here is the code which is causing the problem: >> >> this.__objectController.addTarget(this.__fieldInstances["category"], >> "value", "category[" + (this.getPosition()-1) + "]", true); >> >> If I have the same line but I don't try to do a bidirectional >> mapping: >> >> this.__objectController.addTarget(this.__fieldInstances["category"], >> "value", "category[" + (this.getPosition()-1) + "]", false); >> >> then I have no problems. However this also means that changes to the >> control don't update the model. Let me know if you need anything >> else >> but I don't think there is anything else relevant to this particular >> issue. >> >> Thanks >> >> Eric >> >> -----Original Message----- >> From: Martin Wittemann [mailto:[email protected]] >> Sent: Tuesday, May 05, 2009 3:12 AM >> To: qooxdoo Development >> Subject: Re: [qooxdoo-devel] Bidirectional binding with array element >> >> Hello Eric, >> >> sounds like a problem in the data binding itself. Could you pleas >> show >> us the code you are using. Perhaps i can find the problem in the >> binding or some workaround for wou with the specific code piece. >> >> Best, >> Martin >> >> >> Am 04.05.2009 um 18:20 schrieb Dacquay, Eric: >> >>> Hi, >>> >>> So far I've been able to use the data binding feature with relative >>> ease. However, I am having some issues with the bidirectional >>> mapping. >>> I have an array which I am using to bind a particular element from >>> the >>> array to a control. This works fine in this direction where the >>> array >>> element sets the control value. However, when it tries to establish >>> the >>> reverse binding, it complains because it cannot find: >>> >>> target["set" + qx.lang.String.firstUp(lastProperty)](value); >>> >>> This is not completely surprising as it tries to generate a method >>> name >>> like setArray[0](value) which does not work. Does anyone have any >>> suggestions as to how to get around this? The list controller is >>> not >>> appropriate in this case since I am not binding the array itself to >>> the >>> control, but only a single element. >>> >>> Thanks >>> >>> Eric >>> > > > ------------------------------------------------------------------------ ------ > The NEW KODAK i700 Series Scanners deliver under ANY circumstances! > Your > production scanning environment may not be a perfect world - but > thanks to > Kodak, there's a perfect scanner to get the job done! 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