Invalidate Method (ImageViewer)

Invalidates a portion of the entire surface of the control and causes the control to be redrawn.

Syntax

JavaScript

 function Leadtools.Controls.ImageViewer.invalidate( 
   rc 
)

Parameters

Parameter	Type	Description
rc	LeadRectD	Invalidate rectangle in control coordinates. Pass a LeadRectD or a rectangle with 0 width or height to invalidate the enitre surface of the control.

Remarks

Calling Invalidate will cause the viewer to re-render the content of the view and items. The value of rc will be used as the invalid rectangle used with ImageViewerRenderEventArgs and if it is not empty, only that portion of the viewer will updated.

To re-render a single item quickly, use InvalidateItem or InvalidateItemByIndex.

For more information, refer to Image Viewer Rendering.

Reference

ImageViewer Object
ImageViewer Members