GetInvalidateRect Method (AnnObject)

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

Parameters

Parameter	Type	Description
mapper	AnnContainerMapper	The mapper to use in this container when converting display, container and image coordinates.
renderer	IAnnObjectRenderer	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
            var oldRectangle = annObject.getInvalidateRect(mapper, renderer);
            // Modify annObject, for example
            annObject.translate(10, 10);
            // Get the new physical rectangle of the object
            var newRectangle = annObject.getInvalidateRect(mapper, renderer);
            // Get the union of old and new rectangles
            var invalidateRect = Leadtools.LeadRectD.unionRects(oldRectangle, newRectangle);
            // Invalidate the viewer control so the object is erased and then re-drawn at the new location
            automationControl.automationInvalidate(invalidateRect);
            

Reference

AnnObject Object
AnnObject Members