GetInvalidateRect Method (AnnObject)

public virtual LeadRectD GetInvalidateRect( 
   AnnContainerMapper mapper,
   IAnnObjectRenderer renderer
)

'Declaration
 

Public Overridable Function GetInvalidateRect( _
   ByVal mapper As AnnContainerMapper, _
   ByVal renderer As IAnnObjectRenderer _
) As LeadRectD

public virtual LeadRectD GetInvalidateRect( 
   AnnContainerMapper mapper,
   IAnnObjectRenderer renderer
)

public LeadRectD getInvalidateRect(AnnContainerMapper mapper, IAnnObjectRenderer renderer)
            

 function Leadtools.Annotations.Core.AnnObject.GetInvalidateRect( 
   mapper ,
   renderer 
)

Parameters

mapper

The mapper to use in this container when converting display, container and image coordinates.

renderer

The object renderer to use.

Return Value

Use this method to obtain the current physical rectangle of the object. The mapper and renderer are required to calculate the correct pixel size of the rectangle.

The automation will typically perform invalidation on the automation control like this:

            // Get current physical rectangle of the object
            LeadRectD oldRectangle = annObject.GetInvalidateRect(mapper, renderer);
            // Modify annObject, for example
            annObject.Translate(10, 10);
            // Get the new physical rectangle of the object
            LeadRectD newRectangle = annObject.GetInvalidateRect(mapper, renderer);
            // Get the union of old and new rectangles
            LeadRectD invalidateRect = LeadRectD.UnionRects(oldRectangle, newRectangle);
            // Invalidate the viewer control so the object is erased and then re-drawn at the new location
            automationControl.AutomationInvalidate(invalidateRect);
            

Target Platforms

Reference

AnnObject Class
AnnObject Members