IlvMakeLineInteractor Class Reference

Manager interactor class. More...

#include <ilviews/manager/mklinein.h>

Inheritance diagram for IlvMakeLineInteractor:

Public Member Functions
	IlvMakeLineInteractor (IlvManager *manager, IlvView *view)
	Constructor. More...
virtual void	abort ()
	Aborts the interaction. More...
virtual void	doIt (IlvPoint &from, IlvPoint &to)
	Finalizes the interaction by creating an IlvLine object. More...
virtual void	drawGhost ()
	Visual feedback during the interaction. More...
void	getLine (IlvPoint &from, IlvPoint &to)
	Returns the coordinates of the two points defining the line. More...
void	handleEvent (IlvEvent &event)
	Handles events for the manager view. More...
Public Member Functions inherited from IlvManagerViewInteractor
	IlvManagerViewInteractor (IlvManager *manager, IlvView *view)
	Constructor. More...
virtual void	ensureVisible (const IlvPoint &point)
	Ensures the visibility of a given location. More...
IlvDisplay *	getDisplay () const
	Returns the display of the manager view. More...
IlvManager *	getManager () const
	Returns the manager. More...
IlvTransformer *	getTransformer () const
	Returns the transformer used with the manager view. More...
IlvView *	getView () const
	Returns the manager view. More...
virtual void	handleExpose (IlvRegion *clip=0)
	Called when the manager view receives an expose event. More...
virtual void	init ()
	Initialization, when the interactor is attached to a view. More...

Detailed Description

Manager interactor class.

Library: ilvmgr

Use this class to create IlvLine objects in a view controlled by a manager. The virtual member function handleEvent monitors mouse events. To draw a line, the user:

1. Clicks the left mouse button to set the start point.

2. Drags the other end of the line by moving the mouse with the button held down.

3. Releases the mouse button to indicate the end point.

The member function drawGhost displays the intermediate states of the line being defined.

See Also

IlvLine, IlvMakeArrowLineInteractor, IlvMakeReliefLineInteractor.

Constructor & Destructor Documentation

IlvMakeLineInteractor::IlvMakeLineInteractor	(	IlvManager *	manager,
		IlvView *	view
	)

Constructor.

Initializes a new instance of the IlvMakeLineInteractor class.

Parameters

manager	The manager.
view	The manager view.

Member Function Documentation

virtual void IlvMakeLineInteractor::abort ( )

virtual

Aborts the interaction.

Called by the manager when the user changes the current interactor. It resets the interactor to a state in which it appears to have never been launched. A common implementation is to erase the ghost image. Call this member function to inhibit the interactor action in particular circumstances.

Reimplemented from IlvManagerViewInteractor.

virtual void IlvMakeLineInteractor::doIt ( IlvPoint &  from, IlvPoint &  to  )

virtual

Finalizes the interaction by creating an IlvLine object.

Creates an IlvLine object in the manager using the two points provided by the interaction.

Parameters

from	The first point.
to	The second point.

Reimplemented in IlvMakeReliefLineInteractor, and IlvMakeArrowLineInteractor.

virtual void IlvMakeLineInteractor::drawGhost ( )

virtual

Visual feedback during the interaction.

Draws a relief line in XOR mode.

Reimplemented from IlvManagerViewInteractor.

Reimplemented in IlvMakeArrowLineInteractor.

void IlvMakeLineInteractor::getLine	(	IlvPoint &	from,
		IlvPoint &	to
	)

Returns the coordinates of the two points defining the line.

Parameters

from	Used to return the first point.
to	Used to return the second point.

void IlvMakeLineInteractor::handleEvent ( IlvEvent &  event )

virtual

Handles events for the manager view.

Called by the manager for which the interactor was created with every event it receives in the interactor view.

Implements IlvManagerViewInteractor.