Taxonomy Categories:
Member Functions:
Interface Category:
API.
Inherits From:
None.
Inherited By:
TCanvasDrawingFunnel
TCanvasHitDetectionFunnel
TCanvasInteractionFunnel
TCanvasRectSelectionFunnel
Purpose:
Processes canvas graphics in TCanvasView::EnumerateGraphics and MCanvasSelection::EnumerateGraphics.
Instantiation:
Allocate on the heap or the stack.
Deriving Classes:
Abstract base class; must be derived from to develop specific concrete funnel classes.
Concurrency:
Not multithread safe.
Resource Use:
No special requirements.
Other Considerations:
In EnumerateGraphics the funnel's ProcessGraphic function is called to process each enumerated canvas graphic.
virtual ~ TCanvasGraphicFunnel ()
Interface Category:
API.
Purpose:
Destructor.
Calling Context:
Called to destroy an object.
Parameters:
Return Value:
None.
Exceptions:
Throws no exceptions, passes all exceptions through.
Concurrency:
Not multithread safe.
Other Considerations:
None.
virtual bool ProcessGraphic (const MCanvasGraphic &)
Interface Category:
API.
Purpose:
Processes a canvas graphic during enumeration.
Calling Context:
Called from TCanvasView::EnumerateGraphics or MCanvasSelection::EnumerateGraphics.
Parameters:
Return Value:
Returns true to process more graphics or false to terminate processing of graphics.
Exceptions:
Throws no exceptions, passes all exceptions through.
Concurrency:
Not multithread safe.
Other Considerations:
None.
TCanvasGraphicFunnel ()
Interface Category:
API.
Purpose:
Default constructor.
Calling Context:
Called by the stream-in operators and constructors of derived classes.
Parameters:
Return Value:
None.
Exceptions:
Throws no exceptions, passes all exceptions through.
Concurrency:
Not multithread safe.
Other Considerations:
None.
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