QwtPanner provides panning of a widget. Más...

#include <qwt_panner.h>

Diagrama de herencias de QwtPanner

Clases
class	PrivateData
Señales
void	panned (int dx, int dy)
void	moved (int dx, int dy)
Métodos públicos
	QwtPanner (QWidget *parent)
virtual	~QwtPanner ()
	Destructor.
void	setEnabled (bool)
	En/disable the panner.
bool	isEnabled () const
void	setMouseButton (int button, int buttonState=Qt::NoButton)
void	getMouseButton (int &button, int &buttonState) const
	Get the mouse button.
void	setAbortKey (int key, int state=Qt::NoButton)
void	getAbortKey (int &key, int &state) const
	Get the abort key.
void	setCursor (const QCursor &)
const QCursor	cursor () const
void	enableOrientation (Qt::Orientation, bool enable)
bool	isOrientationEnabled (Qt::Orientation) const
virtual bool	eventFilter (QObject , QEvent )
	Event filter.
Métodos protegidos
virtual void	widgetMousePressEvent (QMouseEvent *)
virtual void	widgetMouseReleaseEvent (QMouseEvent *)
virtual void	widgetMouseMoveEvent (QMouseEvent *)
virtual void	widgetKeyPressEvent (QKeyEvent *)
virtual void	widgetKeyReleaseEvent (QKeyEvent *)
virtual void	paintEvent (QPaintEvent *)
	Paint event.

Descripción detallada

QwtPanner provides panning of a widget.

QwtPanner grabs the contents of a widget, that can be dragged in all directions. The offset between the start and the end position is emitted by the panned signal.

QwtPanner grabs the content of the widget into a pixmap and moves the pixmap around, without initiating any repaint events for the widget. Areas, that are not part of content are not painted while panning in in process. This makes panning fast enough for widgets, where repaints are too slow for mouse movements.

For widgets, where repaints are very fast it might be better to implement panning manually by mapping mouse events into paint events.

Documentación del constructor y destructor

QwtPanner::QwtPanner ( QWidget * parent )

Creates an panner that is enabled for the left mouse button.

Parámetros:

parent Parent widget to be panned

QwtPanner::~QwtPanner ( ) [virtual]

Destructor.

Documentación de las funciones miembro

const QCursor QwtPanner::cursor ( ) const

Devuelve:: Cursor that is active while panning

Ver también:: setCursor()

Reimplementado de QWidget.

void QwtPanner::enableOrientation	(	Qt::Orientation	o,
		bool	enable
	)

bool QwtPanner::eventFilter	(	QObject *	o,
		QEvent *	e
	)		`[virtual]`

Event filter.

When isEnabled() the mouse events of the observed widget are filtered.

Ver también:: widgetMousePressEvent(), widgetMouseReleaseEvent(), widgetMouseMoveEvent()

Reimplementado de QObject.

void QwtPanner::getAbortKey	(	int &	key,
		int &	state
	)		const

Get the abort key.

void QwtPanner::getMouseButton	(	int &	button,
		int &	buttonState
	)		const

Get the mouse button.

bool QwtPanner::isEnabled ( ) const

Devuelve:: true when enabled, false otherwise

Ver también:: setEnabled, eventFilter()

Reimplementado de QWidget.

bool QwtPanner::isOrientationEnabled ( Qt::Orientation o ) const

Return true if a orientatio is enabled

Ver también:: orientations(), setOrientations()

void QwtPanner::moved	(	int	dx,
		int	dy
	)		`[signal]`

Signal emitted, while the widget moved, but panning is not finished.

Parámetros:

dx	Offset in horizontal direction
dy	Offset in vertical direction

void QwtPanner::paintEvent ( QPaintEvent * pe ) [protected, virtual]

Paint event.

Repaint the grabbed pixmap on its current position and fill the empty spaces by the background of the parent widget.

Parámetros:

pe	Paint event

Reimplementado de QWidget.

void QwtPanner::panned	(	int	dx,
		int	dy
	)		`[signal]`

Signal emitted, when panning is done

Parámetros:

dx	Offset in horizontal direction
dy	Offset in vertical direction

void QwtPanner::setAbortKey	(	int	key,
		int	state = `Qt::NoButton`
	)

Change the abort key The defaults are Qt::Key_Escape and Qt::NoButton

void QwtPanner::setCursor ( const QCursor & cursor ) [virtual]

Change the cursor, that is active while panning The default is the cursor of the parent widget.

Parámetros:

cursor New cursor

Ver también:: setCursor()

Reimplementado de QWidget.

void QwtPanner::setEnabled ( bool on ) [virtual]

En/disable the panner.

When enabled is true an event filter is installed for the observed widget, otherwise the event filter is removed.

Parámetros:

on	true or false

Ver también:: isEnabled(), eventFilter()

Reimplementado de QWidget.

void QwtPanner::setMouseButton	(	int	button,
		int	buttonState = `Qt::NoButton`
	)

Change the mouse button The defaults are Qt::LeftButton and Qt::NoButton

void QwtPanner::widgetKeyPressEvent ( QKeyEvent * ke ) [protected, virtual]

Handle a key press event for the observed widget.

Parámetros:

ke Key event

Ver también:: eventFilter(), widgetKeyReleaseEvent()

void QwtPanner::widgetKeyReleaseEvent ( QKeyEvent * ) [protected, virtual]

Handle a key release event for the observed widget.

Parámetros:

ke Key event

Ver también:: eventFilter(), widgetKeyReleaseEvent()

void QwtPanner::widgetMouseMoveEvent ( QMouseEvent * me ) [protected, virtual]

Handle a mouse move event for the observed widget.

Parámetros:

me	Mouse event

Ver también:: eventFilter(), widgetMousePressEvent(), widgetMouseReleaseEvent()

void QwtPanner::widgetMousePressEvent ( QMouseEvent * me ) [protected, virtual]

Handle a mouse press event for the observed widget.

Parámetros:

me	Mouse event

Ver también:: eventFilter(), widgetMouseReleaseEvent(), widgetMouseMoveEvent(),

void QwtPanner::widgetMouseReleaseEvent ( QMouseEvent * me ) [protected, virtual]

Handle a mouse release event for the observed widget.

Parámetros:

me	Mouse event

Ver también:: eventFilter(), widgetMousePressEvent(), widgetMouseMoveEvent(),

La documentación para esta clase fue generada a partir de los siguientes ficheros:

src/qwt/src/qwt_panner.h
src/qwt/src/qwt_panner.cpp

Clases

Señales

Métodos públicos

Métodos protegidos

Descripción detallada

Documentación del constructor y destructor

Documentación de las funciones miembro