The Layout System - The Diigo Meta page

• 04 Apr 14
  

  gachamaru

  wpf layout

• 18 Mar 13
  

  Sven Vermeulen

  WPF

• 11 Apr 12
  

  King Wong

  WPF Fundamentals Layout Performance Considerations

  • Layout is a recursive process. Each child element in a Children collection gets processed during each invocation of the layout system. As a result, triggering the layout system should be avoided when it is not necessary. The following considerations can help you achieve better performance.

     
     
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      Be aware of which property value changes will force a recursive update by the layout system.

       

      Dependency properties whose values can cause the layout system to be initialized are marked with public flags. AffectsMeasure and AffectsArrange provide useful clues as to which property value changes will force a recursive update by the layout system. In general, any property that can affect the size of an element's bounding box should have a AffectsMeasure flag set to true. For more information, see Dependency Properties Overview.

       
     
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      When possible, use a RenderTransform instead of a LayoutTransform.

       

      A LayoutTransform can be a very useful way to affect the content of a user interface (UI). However, if the effect of the transform does not have to impact the position of other elements, it is best to use a RenderTransform instead, because RenderTransform does not invoke the layout system. LayoutTransform applies its transformation and forces a recursive layout update to account for the new position of the affected element.

       
     
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      Avoid unnecessary calls to UpdateLayout.

       

      The UpdateLayout method forces a recursive layout update, and is frequently not necessary. Unless you are sure that a full update is required, rely on the layout system to call this method for you.

       
     
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      When working with a large Children collection, consider using a VirtualizingStackPanel instead of a regular StackPanel.

       

      By virtualizing the child collection, the VirtualizingStackPanel only keeps objects in memory that are currently within the parent's ViewPort. As a result, performance is substantially improved in most scenarios.
• 29 Jul 10
  

  wpf layout .net article programming xaml code development gui msdn

• 13 Jan 10
  

  Ted Cronin

  WPF msdn code layout xaml for:romero_jes

• 03 Mar 09
  

  barker7

  WPF wpf-panels wpf-layout

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