HOpConstructPolyline
Fields
HC_KEY |
Functions
char const * |
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int |
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int |
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int |
Detailed Description
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class HOpConstructPolyline : public HBaseOperator
The HOpConstructPolyline class draws a polyline.
HOpConstructPolyline implements three of the mouse button event handlers defined on the base class and maps the event information to create a polyline. This provides the basic functionality for dynamically creating a temporary, overlayed polyline in the view plane based on pointer input. The polyline points are stored in a protected member array until a double click event is passe. The operation consists of the following steps:
Left Button Down: The operation is initiated and the first point of the polyline is recorded.
No Button Down and Drag: Rubberband line segment to the desired position of the next point.
Left Button Down: The next point in polyline is recorded and continues until the user double clicks the left mouse button.
Left Button Double Click: The polyline is finalized and the geometry is flushed from the scene.
Subclassed by HOpConstructNurbsCurve, HOpCreatePolyline, HOpSelectPolygon, HOpSelectPolyline
Public Functions
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HOpConstructPolyline(HBaseView *view, int DoRepeat = 0, int DoCapture = 1)
Constructs an HOpConstructPolyline object.
- Parameters
view – A pointer to an HBaseView object.
DoRepeat – An integer denoting whether this is a repeatable operator. This parameter has been deprecated.
DoCapture – An 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.
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virtual ~HOpConstructPolyline()
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virtual HBaseOperator *Clone()
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.
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virtual char const *GetName()
- Returns
A pointer to a character string denoting the name of the operator, which is ‘HOpConstructPolyline’.
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virtual int OnNoButtonDownAndMove(HEventInfo &hevent)
OnNoButtonDownAndMove draws a rubberbanded line from the previous point in the polyline to the current mouse position.
- Parameters
hevent – An HEventInfo object containing information about the current event.
- Returns
An HOperatorReturn indicating the status of the event.
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virtual int OnLButtonDown(HEventInfo &hevent)
OnLButtonDown records the first mouse position and initiates the polyline-drawing mechanism. The function also records each successive point in the polyline in a temp array, and connects the points with a line.
- Parameters
hevent – An HEventInfo object containing information about the current event.
- Returns
An HOperatorReturn indicating the status of the event.
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virtual int OnLButtonDblClk(HEventInfo &hevent)
OnLButtonDblClk places the final mouse position into the temp array. This function also takes care of any cleanup.
- Parameters
hevent – An HEventInfo object containing information about the current event.
- Returns
An HOperatorReturn indicating the status of the event.
Public Members
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HC_KEY m_PolylineKey
The key for HOOPS polyline.