Comments on: ItemsControl: 'G' is for Generator http://drwpf.com/blog/2008/07/20/itemscontrol-g-is-for-generator/ Drinking (and serving) the WPF Kool-Aid since 2002 Mon, 30 Aug 2010 18:54:01 -0500 http://wordpress.org/?v=2.8.6 hourly 1 By: Dr. WPF http://drwpf.com/blog/2008/07/20/itemscontrol-g-is-for-generator/comment-page-1/#comment-584 Dr. WPF Wed, 06 Jan 2010 20:17:19 +0000 http://drwpf.com/blog/?p=37#comment-584 Hi Michael, In WPF, it is certainly possible to create a virtualizing canvas that can be used as the items host of an ItemsControl. Here is <a href="http://blogs.msdn.com/jgoldb/archive/2008/03/08/performant-virtualized-wpf-canvas.aspx" rel="nofollow">one example</a>. I've never really tried implementing a virtualizing panel in SL3, but theoretically it should work the same. Cheers, -dw Hi Michael,

In WPF, it is certainly possible to create a virtualizing canvas that can be used as the items host of an ItemsControl. Here is one example.

I’ve never really tried implementing a virtualizing panel in SL3, but theoretically it should work the same.

Cheers,
-dw

]]> By: majkez http://drwpf.com/blog/2008/07/20/itemscontrol-g-is-for-generator/comment-page-1/#comment-534 majkez Tue, 29 Dec 2009 14:50:04 +0000 http://drwpf.com/blog/?p=37#comment-534 PS Sorry for not mentioning - I am programming in SL3. Thanks! PS Sorry for not mentioning – I am programming in SL3.

Thanks!

]]> By: majkez http://drwpf.com/blog/2008/07/20/itemscontrol-g-is-for-generator/comment-page-1/#comment-533 majkez Tue, 29 Dec 2009 14:42:34 +0000 http://drwpf.com/blog/?p=37#comment-533 Dear Doc, is it possible to implement virtualization in custom control, which has Canvas set as ItemsPanel? Should I use then somehow VirtualizingPanel (if possible) or should I implement Virtualization from scratch? Thanks in advance and happy New Year! Michael Dear Doc,

is it possible to implement virtualization in custom control, which has Canvas set as ItemsPanel? Should I use then somehow VirtualizingPanel (if possible) or should I implement Virtualization from scratch?

Thanks in advance and happy New Year!
Michael

]]> By: Dr. WPF http://drwpf.com/blog/2008/07/20/itemscontrol-g-is-for-generator/comment-page-1/#comment-529 Dr. WPF Wed, 23 Dec 2009 08:00:02 +0000 http://drwpf.com/blog/?p=37#comment-529 LOL! Thanks for the heads up, Dave M. I've corrected the link. :) LOL! Thanks for the heads up, Dave M. I’ve corrected the link. :)

]]> By: Dave M. http://drwpf.com/blog/2008/07/20/itemscontrol-g-is-for-generator/comment-page-1/#comment-527 Dave M. Mon, 21 Dec 2009 19:49:42 +0000 http://drwpf.com/blog/?p=37#comment-527 Hi Doc! After all of the teasing and putting off of "G is for Generator", I thought that you were playing a cruel joke on us when the link from your main page took me to "R is for Rob has a Customer". :) Could you please fix your A-Z page? Thankfully, google helped me out here. :) Hi Doc! After all of the teasing and putting off of “G is for Generator”, I thought that you were playing a cruel joke on us when the link from your main page took me to “R is for Rob has a Customer”. :) Could you please fix your A-Z page? Thankfully, google helped me out here. :)

]]> By: Dr. WPF http://drwpf.com/blog/2008/07/20/itemscontrol-g-is-for-generator/comment-page-1/#comment-350 Dr. WPF Fri, 13 Feb 2009 05:42:55 +0000 http://drwpf.com/blog/?p=37#comment-350 Hi Patrik,<br><br>I'd probably need to look at a concrete sample to determine what is happening in your scenario. If you want to send me a simple repro to ask[at]drwpf[dot]com, I'd be happy to take a quick look.<br><br>Cheers,<br>-dw Hi Patrik,

I’d probably need to look at a concrete sample to determine what is happening in your scenario. If you want to send me a simple repro to ask[at]drwpf[dot]com, I’d be happy to take a quick look.

Cheers,
-dw

]]> By: Patrik http://drwpf.com/blog/2008/07/20/itemscontrol-g-is-for-generator/comment-page-1/#comment-349 Patrik Wed, 11 Feb 2009 13:22:30 +0000 http://drwpf.com/blog/?p=37#comment-349 ItemContainerGenerator.StatusChanged containers are created but is Ancestor binding for combobox in datatemplate done? not finding the items in combobox in statuschanged ItemContainerGenerator.StatusChanged containers are created but is Ancestor binding for combobox in datatemplate done? not finding the items in combobox in statuschanged

]]> By: Deb http://drwpf.com/blog/2008/07/20/itemscontrol-g-is-for-generator/comment-page-1/#comment-348 Deb Fri, 12 Dec 2008 01:38:54 +0000 http://drwpf.com/blog/?p=37#comment-348 Thanks DR. WPF ... You saved my day Thanks DR. WPF … You saved my day

]]> By: Dr. WPF http://drwpf.com/blog/2008/07/20/itemscontrol-g-is-for-generator/comment-page-1/#comment-346 Dr. WPF Fri, 15 Aug 2008 11:41:52 +0000 http://drwpf.com/blog/?p=37#comment-346 Hi Jay,<br><br>You can certainly iterate through the items at any time. However, you cannot assume that there will always be visuals for those items. That is the beauty of UI virtualization... the visuals will only be created when they are visible.<br><br>If you find yourself structuring a solution that expects all the visuals to exist, then you probably need to rethink your approach. You won't typically have this problem if you create a view model-based solution where the properties of visuals are set via bindings.<br><br>Cheers,<br>-dw Hi Jay,

You can certainly iterate through the items at any time. However, you cannot assume that there will always be visuals for those items. That is the beauty of UI virtualization… the visuals will only be created when they are visible.

If you find yourself structuring a solution that expects all the visuals to exist, then you probably need to rethink your approach. You won’t typically have this problem if you create a view model-based solution where the properties of visuals are set via bindings.

Cheers,
-dw

]]> By: Jay http://drwpf.com/blog/2008/07/20/itemscontrol-g-is-for-generator/comment-page-1/#comment-345 Jay Fri, 15 Aug 2008 11:36:43 +0000 http://drwpf.com/blog/?p=37#comment-345 This is great so long as the item is in view - if not, I found that ItemContainerGenerator throws null. How hard does it have to be to iterate through a control? This is great so long as the item is in view – if not, I found that ItemContainerGenerator throws null. How hard does it have to be to iterate through a control?

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