PropertyValueUIHandler Delegate
.NET Framework 3.0
Represents the method that adds a delegate to an implementation of IPropertyValueUIService.
Namespace: System.Drawing.Design
Assembly: System.Drawing (in system.drawing.dll)
Assembly: System.Drawing (in system.drawing.dll)
'Declaration Public Delegate Sub PropertyValueUIHandler ( _ context As ITypeDescriptorContext, _ propDesc As PropertyDescriptor, _ valueUIItemList As ArrayList _ ) 'Usage Dim instance As New PropertyValueUIHandler(AddressOf HandlerMethod)
/** @delegate */ public delegate void PropertyValueUIHandler ( ITypeDescriptorContext context, PropertyDescriptor propDesc, ArrayList valueUIItemList )
Not applicable.
Parameters
- context
An ITypeDescriptorContext that can be used to obtain context information.
- propDesc
A PropertyDescriptor that represents the property being queried.
- valueUIItemList
An ArrayList of PropertyValueUIItem objects containing the UI items associated with the property.
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
// PropertyValueUIHandler delegate that provides PropertyValueUIItem
// objects to any properties named HorizontalMargin or VerticalMargin.
private void MarginPropertyValueUIHandler(System.ComponentModel.
ITypeDescriptorContext context, System.ComponentModel.
PropertyDescriptor propDesc, ArrayList itemList)
{
// 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.get_DisplayName().Equals("HorizontalMargin")) {
Image img = DeserializeFromBase64Text(imageBlob1);
itemList.Add(new PropertyValueUIItem(img,
new PropertyValueUIItemInvokeHandler(this.MarginInvoke),
"Test ToolTip"));
}
if (propDesc.get_DisplayName().Equals("VerticalMargin")) {
Image img = DeserializeFromBase64Text(imageBlob1);
img.RotateFlip(RotateFlipType.Rotate90FlipNone);
itemList.Add(new PropertyValueUIItem(img,
new PropertyValueUIItemInvokeHandler(this.MarginInvoke),
"Test ToolTip"));
}
} //MarginPropertyValueUIHandler
Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.Community Additions
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