ZoomWindow Class Reference

This class is used to enable zoom feature. More...

#include <zoomwindow.h>

List of all members.

Public Member Functions
	ZoomWindow (const QRect &rect)
	Constructor using a QRect.
	~ZoomWindow ()
	Destructor.
	operator QRect () const
	Conversion to a QRect.
bool	zoom (float factor, float centerX, float centerY)
	Zooms the width and the height of the rectangle by factor and center it on the specified center (centerX, centerY).
bool	zoom (float factor, const QPoint &center)
	This is an overloaded member function, provided for convenience.
bool	zoom (int firstClickX, int firstClickY, int secondClickX, int secondClickY)
	Zooms on the rectangle specified by two diagonal points (firstClickX,firstClickY) and (secondClickX,secondClickY).
bool	zoom (QPoint firstPoint, QPoint secondPoint)
	This is an overloaded member function, provided for convenience.
void	reset ()
	Resets the zoomWindow to its initialize state.
	ZoomWindow (const QRect &rect)
	Constructor using a QRect.
	~ZoomWindow ()
	Destructor.
	operator QRect () const
	Conversion to a QRect.
bool	zoom (float factor, float centerX, float centerY)
	Zooms the width and the height of the rectangle by factor and center it on the specified center (centerX, centerY).
bool	zoom (float factor, const QPoint &center)
	This is an overloaded member function, provided for convenience.
bool	zoom (int firstClickX, int firstClickY, int secondClickX, int secondClickY)
	Zooms on the rectangle specified by two diagonal points (firstClickX,firstClickY) and (secondClickX,secondClickY).
bool	zoom (QPoint firstPoint, QPoint secondPoint)
	This is an overloaded member function, provided for convenience.
void	reset ()
	Resets the zoomWindow to its initialize state.
Protected Member Functions
void	correctWindow ()
	Make sure that the new window remains inside the intial boundaries.
void	correctWindow ()
	Make sure that the new window remains inside the intial boundaries.

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Detailed Description

This class is used to enable zoom feature.

It computes the dimensions of the QRect (the window of a Qframe) corresponding to the part of the drawing which will actually be drawn onto the widget. The calculs are made in world coordinates system (the drawing coordinates system).

Author:

Lynn Hazan

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Constructor & Destructor Documentation

ZoomWindow::ZoomWindow

(

const QRect &

rect

)

Constructor using a QRect.

Parameters:

rect

initial rectangle.

ZoomWindow::ZoomWindow

(

const QRect &

rect

)

Constructor using a QRect.

Parameters:

rect

initial rectangle.

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Member Function Documentation

bool ZoomWindow::zoom	(	float	factor,
		float	centerX,
		float	centerY
	)

Zooms the width and the height of the rectangle by factor and center it on the specified center (centerX, centerY).

Parameters:

	factor	zoom factor
	centerX	absciss of the center point for the newly zoomed rectangle
	centerY	ordinate of the center point for the newly zoomed rectangle

Returns:

boolean indicating if the zoom has been done

bool ZoomWindow::zoom	(	float	factor,
		const QPoint &	center
	)			[inline]

This is an overloaded member function, provided for convenience.

It behaves essentially like the above function. Zoom the rectangle by factor and center it on center.

Parameters:

	factor	zoom factor
	center	center point for the newly zoomed rectangle

Returns:

boolean indicating if the zoom has been done

bool ZoomWindow::zoom	(	int	firstClickX,
		int	firstClickY,
		int	secondClickX,
		int	secondClickY
	)

Zooms on the rectangle specified by two diagonal points (firstClickX,firstClickY) and (secondClickX,secondClickY).

Parameters:

	firstClickX	absciss of the first selected point
	firstClickY	ordinate of the first selected point
	secondClickX	absciss of the second selected point
	secondClickY	ordinate of the first selected point

Returns:

boolean indicating if the zoom has been done

bool ZoomWindow::zoom	(	QPoint	firstPoint,
		QPoint	secondPoint
	)			[inline]

This is an overloaded member function, provided for convenience.

It behaves essentially like the above function. Zoom on the rectangle specified by two diagonal points firstPoint and secondPoint.

Parameters:

	firstPoint	Qpoint of the first selected point
	secondPoint	Qpoint of the first selected point

Returns:

boolean indicating if the zoom has been done

bool ZoomWindow::zoom	(	float	factor,
		float	centerX,
		float	centerY
	)

Zooms the width and the height of the rectangle by factor and center it on the specified center (centerX, centerY).

Parameters:

	factor	zoom factor
	centerX	absciss of the center point for the newly zoomed rectangle
	centerY	ordinate of the center point for the newly zoomed rectangle

Returns:

boolean indicating if the zoom has been done

bool ZoomWindow::zoom	(	float	factor,
		const QPoint &	center
	)			[inline]

This is an overloaded member function, provided for convenience.

It behaves essentially like the above function. Zoom the rectangle by factor and center it on center.

Parameters:

	factor	zoom factor
	center	center point for the newly zoomed rectangle

Returns:

boolean indicating if the zoom has been done

bool ZoomWindow::zoom	(	int	firstClickX,
		int	firstClickY,
		int	secondClickX,
		int	secondClickY
	)

Zooms on the rectangle specified by two diagonal points (firstClickX,firstClickY) and (secondClickX,secondClickY).

Parameters:

	firstClickX	absciss of the first selected point
	firstClickY	ordinate of the first selected point
	secondClickX	absciss of the second selected point
	secondClickY	ordinate of the first selected point

Returns:

boolean indicating if the zoom has been done

bool ZoomWindow::zoom	(	QPoint	firstPoint,
		QPoint	secondPoint
	)			[inline]

This is an overloaded member function, provided for convenience.

It behaves essentially like the above function. Zoom on the rectangle specified by two diagonal points firstPoint and secondPoint.

Parameters:

	firstPoint	Qpoint of the first selected point
	secondPoint	Qpoint of the first selected point

Returns:

boolean indicating if the zoom has been done

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

• debug/src/zoomwindow.h
• src/zoomwindow.h
• debug/src/zoomwindow.cpp
• src/zoomwindow.cpp

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