MatchesCriteriaBaseCallback Delegate
Represents a function that is used to evaluate if a ContextNodeBase object meets or fails a specified criteria.
Assembly: IACore (in IACore.dll)
'Declaration Public Delegate Function MatchesCriteriaBaseCallback ( _ visitingNode As ContextNodeBase, _ data As Object _ ) As Boolean 'Usage Dim instance As New MatchesCriteriaBaseCallback(AddressOf HandlerMethod)
Parameters
- visitingNode
- Type: System.Windows.Ink.AnalysisCore.ContextNodeBase
The ContextNodeBase object that will be checked against the criteria.
- data
- Type: System.Object
Optional data that can be used for the criteria.
Return Value
Type: System.BooleanA Boolean value which indicates whether the visitingNode object matches the criteria.
The following example finds the collection of ContextNodeBase objects in an InkAnalyzerBase, theInkAnalyzerBase, that satisfies the criteria specified in the MatchesCriteriaBaseCallback delegate function LineIsLowerThan by using an integer, yValue.
LineIsLowerThan returns a true if the ContextNodeBase is of type Line and if the bottom of the bounding box is lower than an integer that is passed in. (Remember that higher y values appear lower on the screen.) Therefore, the nodesBelowYValue collection contains all lines with strokes below the value, yValue.
Public Function LineIsLowerThan( _ ByVal nodeBase As System.Windows.Ink.AnalysisCore.ContextNodeBase, _ ByVal data As Object) As Boolean ' Return false if not a line If nodeBase.Type <> System.Windows.Ink.AnalysisCore.ContextNodeTypeBase.Line Then Return False End If ' Check if bottom is lower than yValue passed in Dim yValue As Integer = Fix(data) Return nodeBase.Location.GetBounds()(3) > yValue End Function 'LineIsLowerThan
Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.