Render Method (AnnThumbStyle)

public virtual void Render( 
   IAnnObjectRenderer renderer,
   AnnContainerMapper mapper,
   LeadPointD location,
   AnnFixedStateOperations operations
)

'Declaration
 

Public Overridable Sub Render( _
   ByVal renderer As IAnnObjectRenderer, _
   ByVal mapper As AnnContainerMapper, _
   ByVal location As LeadPointD, _
   ByVal operations As AnnFixedStateOperations _
) 

'Usage
 

Dim instance As AnnThumbStyle
Dim renderer As IAnnObjectRenderer
Dim mapper As AnnContainerMapper
Dim location As LeadPointD
Dim operations As AnnFixedStateOperations
 
instance.Render(renderer, mapper, location, operations)

public virtual void Render( 
   IAnnObjectRenderer renderer,
   AnnContainerMapper mapper,
   LeadPointD location,
   AnnFixedStateOperations operations
)

- (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)
            

 function Leadtools.Annotations.Rendering.AnnThumbStyle.Render( 
   renderer ,
   mapper ,
   location ,
   operations 
)

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.

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.

Target Platforms

Reference

AnnThumbStyle Class
AnnThumbStyle Members