An abstract base class for slider widgets. Más...

#include <qwt_abstract_slider.h>

Diagrama de herencias de QwtAbstractSlider

Clases
class	PrivateData
Tipos públicos
enum	ScrollMode { ScrNone, ScrMouse, ScrTimer, ScrDirect, ScrPage }
Slots públicos
virtual void	setValue (double val)
	Move the slider to a specified value.
virtual void	fitValue (double val)
	Set the slider's value to the nearest integer multiple of the step size.
virtual void	incValue (int steps)
	Increment the value by a specified number of steps.
virtual void	setReadOnly (bool)
Señales
void	valueChanged (double value)
	Notify a change of value.
void	sliderPressed ()
void	sliderReleased ()
void	sliderMoved (double value)
Métodos públicos
	QwtAbstractSlider (Qt::Orientation, QWidget *parent=NULL)
	Constructor.
virtual	~QwtAbstractSlider ()
	Destructor.
void	setUpdateTime (int t)
	Specify the update interval for automatic scrolling.
void	stopMoving ()
	Stop updating if automatic scrolling is active.
void	setTracking (bool enable)
	Enables or disables tracking.
virtual void	setMass (double val)
	Set the slider's mass for flywheel effect.
virtual double	mass () const
virtual void	setOrientation (Orientation o)
	Set the orientation.
Orientation	orientation () const
bool	isReadOnly () const
bool	isValid () const
void	setValid (bool valid)
Métodos protegidos
virtual void	setPosition (const QPoint &)
virtual void	valueChange ()
virtual void	timerEvent (QTimerEvent *e)
virtual void	mousePressEvent (QMouseEvent *e)
	Mouse press event handler.
virtual void	mouseReleaseEvent (QMouseEvent *e)
	Mouse Release Event handler.
virtual void	mouseMoveEvent (QMouseEvent *e)
virtual void	keyPressEvent (QKeyEvent *e)
virtual void	wheelEvent (QWheelEvent *e)
virtual double	getValue (const QPoint &p)=0
	Determine the value corresponding to a specified poind.
virtual void	getScrollMode (const QPoint &p, int &scrollMode, int &direction)=0
	Determine what to do when the user presses a mouse button.
void	setMouseOffset (double)
double	mouseOffset () const
int	scrollMode () const
Propiedades
bool	readOnly
bool	valid
double	mass
Orientation	orientation

Descripción detallada

An abstract base class for slider widgets.

QwtAbstractSlider is a base class for slider widgets. It handles mouse events and updates the slider's value accordingly. Derived classes only have to implement the getValue() and getScrollMode() members, and should react to a valueChange(), which normally requires repainting.

Documentación de las enumeraciones miembro de la clase

enum QwtAbstractSlider::ScrollMode

Scroll mode

Ver también:: getScrollMode()

Valores de enumeraciones:

ScrNone
ScrMouse
ScrTimer
ScrDirect
ScrPage

Documentación del constructor y destructor

QwtAbstractSlider::QwtAbstractSlider	(	Qt::Orientation	orientation,
		QWidget *	parent = `NULL`
	)		`[explicit]`

Constructor.

Parámetros:

orientation	Orientation
parent	Parent widget

QwtAbstractSlider::~QwtAbstractSlider ( ) [virtual]

Destructor.

Documentación de las funciones miembro

void QwtAbstractSlider::fitValue ( double value ) [virtual, slot]

Set the slider's value to the nearest integer multiple of the step size.

Parámetros:

valeu Value

Ver también:: setValue(), incValue()

Reimplementado de QwtDoubleRange.

virtual void QwtAbstractSlider::getScrollMode	(	const QPoint &	p,
		int &	scrollMode,
		int &	direction
	)		`[protected, pure virtual]`

Determine what to do when the user presses a mouse button.

This function is abstract and has to be implemented by derived classes. It is called on a mousePress event. The derived class can determine what should happen next in dependence of the position where the mouse was pressed by returning scrolling mode and direction. QwtAbstractSlider knows the following modes:

QwtAbstractSlider::ScrNone: Scrolling switched off. Don't change the value.
QwtAbstractSlider::ScrMouse: Change the value while the user keeps the button pressed and moves the mouse.
QwtAbstractSlider::ScrTimer: Automatic scrolling. Increment the value in the specified direction as long as the user keeps the button pressed.
QwtAbstractSlider::ScrPage: Automatic scrolling. Same as ScrTimer, but increment by page size.

Parámetros:

p	point where the mouse was pressed

Valores devueltos:

scrollMode	The scrolling mode
direction	direction: 1, 0, or -1.

Implementado en QwtDial, QwtSlider y QwtWheel.

virtual double QwtAbstractSlider::getValue ( const QPoint & p ) [protected, pure virtual]

Determine the value corresponding to a specified poind.

This is an abstract virtual function which is called when the user presses or releases a mouse button or moves the mouse. It has to be implemented by the derived class.

Parámetros:

p point

Implementado en QwtDial, QwtSlider y QwtWheel.

void QwtAbstractSlider::incValue ( int steps ) [virtual, slot]

Increment the value by a specified number of steps.

Parámetros:

steps number of steps

Ver también:: setValue()

Reimplementado de QwtDoubleRange.

bool QwtAbstractSlider::isReadOnly ( ) const

In read only mode the slider can't be controlled by mouse or keyboard.

Devuelve:: true if read only

Ver también:: setReadOnly()

bool QwtAbstractSlider::isValid ( void ) const [inline]

Ver también:: QwtDblRange::isValid

Reimplementado de QwtDoubleRange.

void QwtAbstractSlider::keyPressEvent ( QKeyEvent * e ) [protected, virtual]

Handles key events

Key_Down, KeyLeft
Decrement by 1
Key_Up, Key_Right
Increment by 1

Parámetros:

e Key event

Ver también:: isReadOnly()

Reimplementado de QWidget.

Reimplementado en QwtCompass y QwtDial.

virtual double QwtAbstractSlider::mass ( ) const [virtual]

Reimplementado en QwtWheel.

void QwtAbstractSlider::mouseMoveEvent ( QMouseEvent * e ) [protected, virtual]

Mouse Move Event handler

Parámetros:

e	Mouse event

Reimplementado de QWidget.

double QwtAbstractSlider::mouseOffset ( ) const [protected]

void QwtAbstractSlider::mousePressEvent ( QMouseEvent * e ) [protected, virtual]

Mouse press event handler.

Reimplementado de QWidget.

void QwtAbstractSlider::mouseReleaseEvent ( QMouseEvent * e ) [protected, virtual]

Mouse Release Event handler.

Reimplementado de QWidget.

Orientation QwtAbstractSlider::orientation ( ) const

int QwtAbstractSlider::scrollMode ( ) const [protected]

void QwtAbstractSlider::setMass ( double val ) [virtual]

Set the slider's mass for flywheel effect.

If the slider's mass is greater then 0, it will continue to move after the mouse button has been released. Its speed decreases with time at a rate depending on the slider's mass. A large mass means that it will continue to move for a long time.

Derived widgets may overload this function to make it public.

Parámetros:

val	New mass in kg

Bug:: If the mass is smaller than 1g, it is set to zero. The maximal mass is limited to 100kg.

Ver también:: mass()

Reimplementado en QwtWheel.

void QwtAbstractSlider::setMouseOffset ( double offset ) [protected]

void QwtAbstractSlider::setOrientation ( Qt::Orientation o ) [virtual]

Set the orientation.

Parámetros:

o	Orientation. Allowed values are Qt::Horizontal and Qt::Vertical.

Reimplementado en QwtSlider y QwtWheel.

void QwtAbstractSlider::setPosition ( const QPoint & p ) [protected, virtual]

Move the slider to a specified point, adjust the value and emit signals if necessary.

void QwtAbstractSlider::setReadOnly ( bool readOnly ) [virtual, slot]

En/Disable read only mode

In read only mode the slider can't be controlled by mouse or keyboard.

Parámetros:

readOnly Enables in case of true

Ver también:: isReadOnly()

void QwtAbstractSlider::setTracking ( bool enable )

Enables or disables tracking.

If tracking is enabled, the slider emits a valueChanged() signal whenever its value changes (the default behaviour). If tracking is disabled, the value changed() signal will only be emitted if:

the user releases the mouse button and the value has changed or
at the end of automatic scrolling.

Tracking is enabled by default.

Parámetros:

enable true (enable) or false (disable) tracking.

void QwtAbstractSlider::setUpdateTime ( int t )

Specify the update interval for automatic scrolling.

Parámetros:

t	update interval in milliseconds

Ver también:: getScrollMode()

void QwtAbstractSlider::setValid ( bool valid ) [inline]

Ver también:: QwtDblRange::isValid

Reimplementado de QwtDoubleRange.

void QwtAbstractSlider::setValue ( double val ) [virtual, slot]

Move the slider to a specified value.

This function can be used to move the slider to a value which is not an integer multiple of the step size.

Parámetros:

val new value

Ver también:: fitValue()

Reimplementado de QwtDoubleRange.

void QwtAbstractSlider::sliderMoved ( double value ) [signal]

This signal is emitted when the user moves the slider with the mouse.

Parámetros:

value new value

void QwtAbstractSlider::sliderPressed ( ) [signal]

This signal is emitted when the user presses the movable part of the slider (start ScrMouse Mode).

void QwtAbstractSlider::sliderReleased ( ) [signal]

This signal is emitted when the user releases the movable part of the slider.

void QwtAbstractSlider::stopMoving ( )

Stop updating if automatic scrolling is active.

void QwtAbstractSlider::timerEvent ( QTimerEvent * e ) [protected, virtual]

Qt timer event

Parámetros:

e	Timer event

Reimplementado de QObject.

void QwtAbstractSlider::valueChange ( ) [protected, virtual]

Notify change of value

This function can be reimplemented by derived classes in order to keep track of changes, i.e. repaint the widget. The default implementation emits a valueChanged() signal if tracking is enabled.

Reimplementado de QwtDoubleRange.

Reimplementado en QwtDial, QwtSlider y QwtWheel.

void QwtAbstractSlider::valueChanged ( double value ) [signal]

Notify a change of value.

In the default setting (tracking enabled), this signal will be emitted every time the value changes ( see setTracking() ).

Parámetros:

value new value

void QwtAbstractSlider::wheelEvent ( QWheelEvent * e ) [protected, virtual]

Wheel Event handler

Parámetros:

e	Whell event

Reimplementado de QWidget.

Documentación de propiedades

double QwtAbstractSlider::mass [read, write]

Devuelve:: mass

Ver también:: setMass()

Reimplementado en QwtWheel.

Qt::Orientation QwtAbstractSlider::orientation [read, write]

Devuelve:: Orientation

Ver también:: setOrientation()

bool QwtAbstractSlider::readOnly [read, write]

bool QwtAbstractSlider::valid [read, write]

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

src/qwt/src/qwt_abstract_slider.h
src/qwt/src/qwt_abstract_slider.cpp

Clases

Tipos públicos

Slots públicos

Señales

Métodos públicos

Métodos protegidos

Propiedades

Descripción detallada

Documentación de las enumeraciones miembro de la clase

Documentación del constructor y destructor

Documentación de las funciones miembro

Documentación de propiedades