IlvGanttZoomInteractor Class Reference

Interactor to perform zooms on gantt lines. More...

#include <ilviews/gantt/ganttint.h>

Inheritance diagram for IlvGanttZoomInteractor:

Public Member Functions
	IlvGanttZoomInteractor (IlvGanttChart *gantt, IlvView *view, IlUShort button=IlvLeftButton)
	Constructor. More...
virtual void	doIt (IlvRect &rect)
	Performs the zoom operation. More...
virtual void	drawGhost ()
	Draws the rectangle dragged by the user. More...
virtual void	ensureVisible (const IlvPoint &p)
	Translates the working view according to the mouse position. More...
IlvGanttChart *	getGanttChart () const
	Returns the Gantt chart with which this interactor is associated. More...

Detailed Description

Interactor to perform zooms on gantt lines.

Library: ilvgantt

An IlvGanttZoomInteractor interactor zooms in or out in the view connected to the manager that stores the Gantt lines.

See Also

IlvGanttChart, IlvGanttLine.

Constructor & Destructor Documentation

IlvGanttZoomInteractor::IlvGanttZoomInteractor	(	IlvGanttChart *	gantt,
		IlvView *	view,
		IlUShort	button = IlvLeftButton
	)

Constructor.

The constructor initializes a new instance of the IlvGanttZoomInteractor class that zooms in or out in the view view connected to the manager that stores the lines of the Gantt chart gantt. The Gantt grapher views having the same row as this view are zoomed automatically. Use button to specify which mouse button must be used for zooming.

Parameters

gantt	The Gantt chart to which the interactor is attached.
view	The manager view to which the interactor is attached. This view must be one of the Gantt manager view where resources (lines) are displayed.
button	The mouse button that is used for the interaction.

Member Function Documentation

virtual void IlvGanttZoomInteractor::doIt ( IlvRect &  rect )

virtual

Performs the zoom operation.

Computes the first and the last visible rows from the rectangle rect that the user has been dragging, then zooms in or out in the view to ensure that these rows remain visible on the screen.

Parameters

rect	The rectangle drawn by the user.

Reimplemented from IlvDragRectangleInteractor.

virtual void IlvGanttZoomInteractor::drawGhost ( )

virtual

Draws the rectangle dragged by the user.

Draws in XOR mode the rectangle dragged by the user.

Reimplemented from IlvDragRectangleInteractor.

virtual void IlvGanttZoomInteractor::ensureVisible ( const IlvPoint &  p )

virtual

Translates the working view according to the mouse position.

Performs a logical view translation when the user drags the mouse outside the view.

Parameters

p	The location of the mouse, in view coordinates.

Reimplemented from IlvDragRectangleInteractor.

IlvGanttChart* IlvGanttZoomInteractor::getGanttChart

(

)

const

Returns the Gantt chart with which this interactor is associated.

Returns

The Gantt chart with which this interactor is associated.