Provided by: libqwt-doc_6.1.4-2build2_all 
NAME
QwtSlider - The Slider Widget.
SYNOPSIS
#include <qwt_slider.h>
Inherits QwtAbstractSlider.
Public Types
enum ScalePosition { NoScale, LeadingScale, TrailingScale }
Public Member Functions
QwtSlider (QWidget *parent=NULL)
QwtSlider (Qt::Orientation, QWidget *parent=NULL)
virtual ~QwtSlider ()
Destructor.
void setOrientation (Qt::Orientation)
Set the orientation.
Qt::Orientation orientation () const
void setScalePosition (ScalePosition)
Change the position of the scale.
ScalePosition scalePosition () const
void setTrough (bool)
bool hasTrough () const
void setGroove (bool)
bool hasGroove () const
void setHandleSize (const QSize &)
Set the slider's handle size.
QSize handleSize () const
void setBorderWidth (int)
Change the slider's border width.
int borderWidth () const
void setSpacing (int)
Change the spacing between trough and scale.
int spacing () const
virtual QSize sizeHint () const
virtual QSize minimumSizeHint () const
void setScaleDraw (QwtScaleDraw *)
Set a scale draw.
const QwtScaleDraw * scaleDraw () const
void setUpdateInterval (int)
Specify the update interval for automatic scrolling.
int updateInterval () const
Protected Member Functions
virtual double scrolledTo (const QPoint &) const
Determine the value for a new position of the slider handle.
virtual bool isScrollPosition (const QPoint &) const
Determine what to do when the user presses a mouse button.
virtual void drawSlider (QPainter *, const QRect &) const
virtual void drawHandle (QPainter *, const QRect &, int pos) const
virtual void mousePressEvent (QMouseEvent *)
virtual void mouseReleaseEvent (QMouseEvent *)
virtual void resizeEvent (QResizeEvent *)
virtual void paintEvent (QPaintEvent *)
virtual void changeEvent (QEvent *)
virtual void timerEvent (QTimerEvent *)
virtual void scaleChange ()
Notify changed scale.
QRect sliderRect () const
QRect handleRect () const
Additional Inherited Members
Detailed Description
The Slider Widget.
QwtSlider is a slider widget which operates on an interval of type double. Its position is related to a
scale showing the current value.
The slider can be customized by having a through, a groove - or both.
Member Enumeration Documentation
enum QwtSlider::ScalePosition
Position of the scale
See also:
QwtSlider(), setScalePosition(), setOrientation()
Enumerator
NoScale
The slider has no scale.
LeadingScale
The scale is right of a vertical or below a horizontal slider.
TrailingScale
The scale is left of a vertical or above a horizontal slider.
Constructor & Destructor Documentation
QwtSlider::QwtSlider (QWidget * parent = NULL) [explicit]
Construct vertical slider in QwtSlider::Trough style with a scale to the left.
The scale is initialized to [0.0, 100.0] and the value set to 0.0.
Parameters:
parent Parent widget
See also:
setOrientation(), setScalePosition(), setBackgroundStyle()
QwtSlider::QwtSlider (Qt::Orientation orientation, QWidget * parent = NULL) [explicit]
Construct a slider in QwtSlider::Trough style
When orientation is Qt::Vertical the scale will be aligned to the left - otherwise at the the top of the
slider.
The scale is initialized to [0.0, 100.0] and the value set to 0.0.
Parameters:
parent Parent widget
orientation Orientation of the slider.
Member Function Documentation
int QwtSlider::borderWidth () const
Returns:
the border width.
See also:
setBorderWidth()
void QwtSlider::changeEvent (QEvent * event) [protected], [virtual]
Handles QEvent::StyleChange and QEvent::FontChange events
Parameters:
event Change event
void QwtSlider::drawHandle (QPainter * painter, const QRect & handleRect, int pos) const [protected],
[virtual]
Draw the thumb at a position
Parameters:
painter Painter
handleRect Bounding rectangle of the handle
pos Position of the handle marker in widget coordinates
void QwtSlider::drawSlider (QPainter * painter, const QRect & sliderRect) const [protected], [virtual]
Draw the slider into the specified rectangle.
Parameters:
painter Painter
sliderRect Bounding rectangle of the slider
QRect QwtSlider::handleRect () const [protected]
Returns:
Bounding rectangle of the slider handle
QSize QwtSlider::handleSize () const
Returns:
Size of the handle.
See also:
setHandleSize()
bool QwtSlider::hasGroove () const
Returns:
True, when the groove is visisble
See also:
setGroove(), hasTrough()
bool QwtSlider::hasTrough () const
Returns:
True, when the trough is visisble
See also:
setTrough(), hasGroove()
bool QwtSlider::isScrollPosition (const QPoint & pos) const [protected], [virtual]
Determine what to do when the user presses a mouse button.
Parameters:
pos Mouse position
Return values:
True,when handleRect() contains pos
See also:
scrolledTo()
Implements QwtAbstractSlider.
QSize QwtSlider::minimumSizeHint () const [virtual]
Returns:
Minimum size hint
See also:
sizeHint()
void QwtSlider::mousePressEvent (QMouseEvent * event) [protected], [virtual]
Mouse press event handler
Parameters:
event Mouse event
Reimplemented from QwtAbstractSlider.
void QwtSlider::mouseReleaseEvent (QMouseEvent * event) [protected], [virtual]
Mouse release event handler
Parameters:
event Mouse event
Reimplemented from QwtAbstractSlider.
Qt::Orientation QwtSlider::orientation () const
Returns:
Orientation
See also:
setOrientation()
void QwtSlider::paintEvent (QPaintEvent * event) [protected], [virtual]
Qt paint event handler
Parameters:
event Paint event
void QwtSlider::resizeEvent (QResizeEvent * event) [protected], [virtual]
Qt resize event handler
Parameters:
event Resize event
const QwtScaleDraw * QwtSlider::scaleDraw () const
Returns:
the scale draw of the slider
See also:
setScaleDraw()
QwtSlider::ScalePosition QwtSlider::scalePosition () const
Returns:
Position of the scale
See also:
setScalePosition()
double QwtSlider::scrolledTo (const QPoint & pos) const [protected], [virtual]
Determine the value for a new position of the slider handle.
Parameters:
pos Mouse position
Returns:
Value for the mouse position
See also:
isScrollPosition()
Implements QwtAbstractSlider.
void QwtSlider::setBorderWidth (int width)
Change the slider's border width. The border width is used for drawing the slider handle and the trough.
Parameters:
width Border width
See also:
borderWidth()
void QwtSlider::setGroove (bool on)
En/Disable the groove
The slider can be cutomized by showing a groove for the handle.
Parameters:
on When true, the groove is visible
See also:
hasGroove(), setThrough()
void QwtSlider::setHandleSize (const QSize & size)
Set the slider's handle size. When the size is empty the slider handle will be painted with a default
size depending on its orientation() and backgroundStyle().
Parameters:
size New size
See also:
handleSize()
void QwtSlider::setOrientation (Qt::Orientation orientation)
Set the orientation.
Parameters:
orientation Allowed values are Qt::Horizontal and Qt::Vertical.
See also:
orientation(), scalePosition()
void QwtSlider::setScaleDraw (QwtScaleDraw * scaleDraw)
Set a scale draw. For changing the labels of the scales, it is necessary to derive from QwtScaleDraw and
overload QwtScaleDraw::label().
Parameters:
scaleDraw ScaleDraw object, that has to be created with new and will be deleted in ~QwtSlider() or
the next call of setScaleDraw().
See also:
scaleDraw()
void QwtSlider::setScalePosition (ScalePosition scalePosition)
Change the position of the scale.
Parameters:
scalePosition Position of the scale.
See also:
ScalePosition, scalePosition()
void QwtSlider::setSpacing (int spacing)
Change the spacing between trough and scale. A spacing of 0 means, that the backbone of the scale is
covered by the trough.
The default setting is 4 pixels.
Parameters:
spacing Number of pixels
See also:
spacing();
void QwtSlider::setTrough (bool on)
En/Disable the trough
The slider can be cutomized by showing a trough for the handle.
Parameters:
on When true, the groove is visible
See also:
hasTrough(), setGroove()
void QwtSlider::setUpdateInterval (int interval)
Specify the update interval for automatic scrolling. The minimal accepted value is 50 ms.
Parameters:
interval Update interval in milliseconds
See also:
setUpdateInterval()
QSize QwtSlider::sizeHint () const [virtual]
Returns:
minimumSizeHint()
QRect QwtSlider::sliderRect () const [protected]
Returns:
Bounding rectangle of the slider - without the scale
int QwtSlider::spacing () const
Returns:
Number of pixels between slider and scale
See also:
setSpacing()
void QwtSlider::timerEvent (QTimerEvent * event) [protected], [virtual]
Timer event handler
Handles the timer, when the mouse stays pressed inside the sliderRect().
Parameters:
event Mouse event
int QwtSlider::updateInterval () const
Returns:
Update interval in milliseconds for automatic scrolling
See also:
setUpdateInterval()
Author
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Version 6.1.4 Wed Jan 2 2019 QwtSlider(3)