←Select platform

Render Method

Summary
Renders this thumb at the specified center location.
Syntax
C#
VB
Objective-C
C++
Java
Public Overridable Sub Render( _ 
   ByVal renderer As IAnnObjectRenderer, _ 
   ByVal mapper As AnnContainerMapper, _ 
   ByVal location As LeadPointD, _ 
   ByVal operations As AnnFixedStateOperations _ 
)  
- (void)renderer:(id<LTIAnnObjectRenderer>)renderer 
          mapper:(LTAnnContainerMapper *)mapper 
        location:(LeadPointD)location 
       operation:(LTAnnFixedStateOperations)operation 
public void render(IAnnObjectRenderer renderer, 
                   AnnContainerMapper mapper, 
                   LeadPointD location, 
                   int annFixedStateOperations) 

Parameters

renderer
The object renderer being invoked. Must not be null.

mapper
The mapper object to use for converting coordinates. Must not be null.

location
The center location of the thumb in container coordinates.

operations
The fixed state of the owner object.

Remarks

This method is called by the renderer from the IAnnObjectRenderer.RenderThumbs and IAnnObjectRenderer.RenderRotatePointThumbs methods. The framework will call these methods to render the selected and rotation thumbs of an object.

This AnnThumbStyle performs the following during this method:

  1. Converts the center location and size into physical coordinates using mapper.PointFromContainerCoordinates and mapper.SizeFromContainerCoordinates respectively. It then creates a rectangle for the converted location and size with the origin at the location.
  2. Calls the AddPath method, passing the rectangle calculated in the above step, to allow the implementation class to draw the actual thumb shape.
  3. Finally, it uses Fill and Stroke to fill and draw the path onto the destination context (stored in renderer.RenderingEngine.
Requirements

Target Platforms

Help Version 21.0.2021.3.2
Products | Support | Contact Us | Intellectual Property Notices
© 1991-2021 LEAD Technologies, Inc. All Rights Reserved.

Leadtools.Annotations.Rendering.WinForms Assembly