When overridden in a derived class, positions child elements and determines a size for a FrameworkElement derived class.
Assembly: PresentationFramework (in PresentationFramework.dll)
'Declaration Protected Overridable Function ArrangeOverride ( _ finalSize As Size _ ) As Size
- Type: System.Windows.Size
The final area within the parent that this element should use to arrange itself and its children.
Return ValueType: System.Windows.Size
The actual size used.
Control authors who want to customize the arrange pass of layout processing should override this method. The implementation pattern should call Arrange on each visible child element, and pass the final desired size for each child element as the finalRect parameter. Parent elements should call Arrange on each child, otherwise the child elements will not be rendered.
The example defines a simple custom Panel element called PlotPanel, which positions child elements according to two hard-coded x- and y-coordinates. In this example, x and y are both set to 50; therefore, all child elements are positioned at that location on the x and y axes.
Public Class PlotPanel Inherits Panel 'Override the default Measure method of Panel. Protected Overrides Function MeasureOverride(ByVal availableSize As System.Windows.Size) As System.Windows.Size Dim panelDesiredSize As Size = New Size() ' In our example, we just have one child. ' Report that our panel requires just the size of its only child. For Each child As UIElement In InternalChildren child.Measure(availableSize) panelDesiredSize = child.DesiredSize Next Return panelDesiredSize End Function Protected Overrides Function ArrangeOverride(ByVal finalSize As System.Windows.Size) As System.Windows.Size For Each child As UIElement In InternalChildren Dim x As Double = 50 Dim y As Double = 50 child.Arrange(New Rect(New System.Windows.Point(x, y), child.DesiredSize)) Next Return finalSize End Function End Class
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.