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HOpSelectPolygon Class Reference

The HOpSelectPolygon class computes a selection list for objects inside a user-defined polygonal area. More...

#include <HOpSelectPolygon.h>

List of all members.

Public Member Functions

virtual HBaseOperatorClone ()
virtual const char * GetName ()
 HOpSelectPolygon (HBaseView *view, int DoRepeat=0, int DoCapture=1)
virtual int OnLButtonDblClk (HEventInfo &hevent)
virtual int OnLButtonDown (HEventInfo &hevent)

Detailed Description

The HOpSelectPolygon class computes a selection list for objects inside a user-defined polygonal area.

HOpSelectPolygon employs all of the drawing functionality of HOpConstructPolyline to define a temporary, overlayed polygonal selection area, and then maps the polygon information to the HOOPS routine HC_Compute_Selection_By_Polygon. The operation consists of the following steps:

  1. Left Button Down: operation initiated, first point of the polygon recorded
  2. No Button Down and Drag: rubberband line segment to desired position of next point
  3. Left Button Down: next point in polygon recorded, etc.
  4. Left Button Double Click: polygon completed, and flushed from scene, selection list computed, objects highlighted, operation ended

More Detailed Description: see event methods Functional Note: This operator does not provide exact results for HOOPS' Shell and Mesh primitives.


Constructor & Destructor Documentation

HOpSelectPolygon::HOpSelectPolygon ( HBaseView view,
int  DoRepeat = 0,
int  DoCapture = 1 
)

Constructs an HOpSelectPolygon object.

Parameters:
viewA pointer to an HBaseView object
DoRepeatAn integer denoting whether this is a repeatable operator. This parameter has been deprecated.
DoCaptureAn integer denoting whether the mouse state should be captured, which means that all mouse events should be received after a mousedown, even if it leaves the window. This parameter has been deprecated.

Member Function Documentation

virtual HBaseOperator* HOpSelectPolygon::Clone ( ) [virtual]

Creates a new operator which is a copy of the current operator. The user is responsible for deleting the newly created operator.

Returns:
A pointer to the newly created HOpConstructPolyline object.

Reimplemented from HOpConstructPolyline.

virtual const char* HOpSelectPolygon::GetName ( ) [virtual]
Returns:
A pointer to a character string denoting the name of the operator 'HOpSelectPolygon'.

Reimplemented from HOpConstructPolyline.

virtual int HOpSelectPolygon::OnLButtonDblClk ( HEventInfo hevent) [virtual]

returns a pointer to a copy of the operator

OnLButtonDblClk passes the polyline array from HOpConstructPolyline::OnLButtonDblClk into the HOOPS routine HC_Insert_Polygon and inserts the polygon into the scene. The polyline information is also passed to Compute_Selection_By_Polygon. Currently selected items are highlighted, and items previously highlighted are de-selected.

Parameters:
heventAn HEventInfo object containing information about the current event.
Returns:
A value indicating the result of the event handling.

Reimplemented from HOpConstructPolyline.

virtual int HOpSelectPolygon::OnLButtonDown ( HEventInfo hevent) [virtual]

OnLButtonDown initiates the polygon selection mechanism.

Parameters:
heventAn HEventInfo object containing information about the current event.
Returns:
A value indicating the result of the event handling.

Reimplemented from HOpConstructPolyline.


The documentation for this class was generated from the following file: