IlvReshapeInteractor Class Reference

Interactor to resize graphic objects. More...

#include <ilviews/graphics/inter.h>

Inheritance diagram for IlvReshapeInteractor:

Public Member Functions
virtual void	doIt (IlvGraphic *object, IlvRect &rect, const IlvTransformer *t=0)
	Finalizes the interaction by resizing the object. More...
virtual void	drawGhost (IlvRect &rect, IlvView *view)
	Visual feedback during the interaction. More...
virtual IlBoolean	handleEvent (IlvGraphic *obj, IlvEvent &event, const IlvTransformer *t)
	Handles events received by the interactor. More...
virtual void	validate (IlvGraphic *obj, IlvRect &rect, const IlvTransformer *t=0)
	Allows you to modify the intermediate rectangle during the interaction. More...
Public Member Functions inherited from IlvInteractor
virtual void	abort (IlvGraphic *obj)
	Aborts the interactor. More...
virtual IlBoolean	accept (const IlvGraphic *obj) const
	Indicates whether the current interactor can be associated with a given object. More...
virtual void	endOperation ()
	Performs the actions needed when the interaction ends. More...
virtual void	getCallbackTypes (IlUInt &count, const char *const **names, const IlSymbol *const **types) const
	Gets the number of register callback types for the interactor. More...
const char *	getRegisteredName () const
	Returns the name of the predefined shared instance. More...
IlBoolean	isAborted () const
	Indicates whether the current interactor is in an aborted state. More...
IlBoolean	isInOperation () const
	Indicates whether the current interactor is in an interaction state. More...
void	lock ()
	Locks the current instance. Increments the counter that is used to know how many objects reference the current instance. More...
virtual void	startOperation ()
	Performs the actions needed when the interaction starts. More...
void	unLock ()
	Unlocks the current instance. Decrements the reference counter. When the counter drops down to zero, the current instance is deleted. More...

Additional Inherited Members
Static Public Member Functions inherited from IlvInteractor
static IlvInteractor *	Get (const char *name, IlBoolean=IlTrue)
	Returns a predefined shared interactor instance. More...

Detailed Description

Interactor to resize graphic objects.

Library: views

The IlvReshapeInteractor class lets the user resize an object by dragging its bounding box with the middle mouse button.

The registered name of this interactor is "Reshape".

See also

IlvMoveInteractor, IlvMoveReshapeInteractor.

Member Function Documentation

doIt()

virtual void IlvReshapeInteractor::doIt ( IlvGraphic *  object, IlvRect &  rect, const IlvTransformer *  t = 0  )

virtual

Finalizes the interaction by resizing the object.

Called to resize the object to the new geometry provided by rect. After reshaping the object, this method calls the object's callback corresponding to the Reshape symbol.

Parameters

object	The graphic object.
rect	The rectangle, in the object coordinate system.
t	The transformer applied to the view.

See also

IlvGraphic::setCallback()

drawGhost()

virtual void IlvReshapeInteractor::drawGhost ( IlvRect &  rect, IlvView *  view  )

virtual

Visual feedback during the interaction.

Called to draw a preview image of the resulting user action. It is generally invoked by handleEvent() as a response to user events.

Parameters

rect	The rectangle.
view	The view where the object is displayed.

handleEvent()

virtual IlBoolean IlvReshapeInteractor::handleEvent ( IlvGraphic *  g, IlvEvent &  event, const IlvTransformer *  t  )

virtual

Handles events received by the interactor.

This method is the entry point of all events dispatched to this interactor.

Parameters

g	The graphic object that receives the event.
event	The received event.
t	The transformer applied to the view in which the event occurred.

Returns

IlTrue if the event was successfully handled and IlFalse otherwise.

Implements IlvInteractor.

validate()

virtual void IlvReshapeInteractor::validate ( IlvGraphic *  obj, IlvRect &  rect, const IlvTransformer *  t = 0  )

virtual

Allows you to modify the intermediate rectangle during the interaction.

Called for each mouse movement to modify the bounding box. The rectangle is provided in the view coordinate system and can be modified to satisfy any given constraint. When the mouse button is released, the IlvReshapeInteractor::doIt() method is called.

Parameters

obj	The graphic object.
rect	The rectangle provided by the interaction.
t	The transformer applied to the view.