PropertyValueUIHandler Delegate
.NET Framework (current version)
Represents the method that adds a delegate to an implementation of IPropertyValueUIService.
Assembly: System.Drawing (in System.Drawing.dll)
Public Delegate Sub PropertyValueUIHandler ( context As ITypeDescriptorContext, propDesc As PropertyDescriptor, valueUIItemList As ArrayList )
Parameters
- context
-
Type:
System.ComponentModel.ITypeDescriptorContext
An ITypeDescriptorContext that can be used to obtain context information.
- propDesc
-
Type:
System.ComponentModel.PropertyDescriptor
A PropertyDescriptor that represents the property being queried.
- valueUIItemList
-
Type:
System.Collections.ArrayList
An ArrayList of PropertyValueUIItem objects containing the UI items associated with the property.
When this delegate is invoked, it can add a PropertyValueUIItem containing UI items for the specified property to the ArrayList passed as the valueUIItemList parameter.
This following code example demonstrates creating a PropertyValueUIHandler event handler method that provides PropertyValueUIItem objects for any properties named HorizontalMargin or VerticalMargin.
' PropertyValueUIHandler delegate that provides PropertyValueUIItem ' objects to any properties named HorizontalMargin or VerticalMargin. Private Sub marginPropertyValueUIHandler(ByVal context As System.ComponentModel.ITypeDescriptorContext, ByVal propDesc As System.ComponentModel.PropertyDescriptor, ByVal itemList As ArrayList) ' A PropertyValueUIHandler added to the IPropertyValueUIService ' is queried once for each property of a component and passed ' a PropertyDescriptor that represents the characteristics of ' the property when the Properties window is set to a new ' component. A PropertyValueUIHandler can determine whether ' to add a PropertyValueUIItem for the object to its ValueUIItem ' list depending on the values of the PropertyDescriptor. If propDesc.DisplayName.Equals("HorizontalMargin") Then Dim img As Image = DeserializeFromBase64Text(imageBlob1) itemList.Add(New PropertyValueUIItem(img, New PropertyValueUIItemInvokeHandler(AddressOf Me.marginInvoke), "Test ToolTip")) End If If propDesc.DisplayName.Equals("VerticalMargin") Then Dim img As Image = DeserializeFromBase64Text(imageBlob1) img.RotateFlip(RotateFlipType.Rotate90FlipNone) itemList.Add(New PropertyValueUIItem(img, New PropertyValueUIItemInvokeHandler(AddressOf Me.marginInvoke), "Test ToolTip")) End If End Sub
.NET Framework
Available since 1.1
Available since 1.1
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