GetInvalidateRect Method (original) (raw)

Syntax

C#

Objective-C

C++/CLI

Java

Python

- (LeadRectD)getInvalidateRectMapper:(LTAnnContainerMapper *)mapper renderer:(id<LTIAnnObjectRenderer>)renderer; 

public LeadRectD getInvalidateRect(AnnContainerMapper mapper, IAnnObjectRenderer 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

The current physical rectangle of this AnnObject.

Remarks

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);