conflicting packages
QwtWheel(3) | Qwt User's Guide | QwtWheel(3) |
NAME¶
QwtWheel - The Wheel Widget.SYNOPSIS¶
#include <qwt_wheel.h> Inherits QwtAbstractSlider.Public Types¶
enum ScrollMode { ScrNone, ScrMouse, ScrTimer, ScrDirect, ScrPage }
Public Slots¶
virtual void fitValue (double val)
Signals¶
void sliderMoved (double value)
Public Member Functions¶
virtual void incPages (int)
Protected Member Functions¶
void draw (QPainter *, const QRect &)
Detailed Description¶
The Wheel Widget.The radio example.
Member Enumeration Documentation¶
enum QwtAbstractSlider::ScrollMode [inherited] Scroll mode¶
See also:getScrollMode()
Constructor & Destructor Documentation¶
QwtWheel::QwtWheel (QWidget *parent = NULL) [explicit]¶
Constructor.QwtWheel::~QwtWheel () [virtual]¶
Destructor.Member Function Documentation¶
void QwtWheel::draw (QPainter *painter, const QRect &) [protected] Redraw panel and wheel¶
Parameters:painter Painter
void QwtWheel::drawWheel (QPainter *painter, const QRect &r) [protected]¶
Redraw the wheel. Parameters:painter painter
r contents rectangle
void QwtWheel::drawWheelBackground (QPainter *painter, const QRect &r) [protected] Draw the Wheel's background gradient¶
Parameters:painter Painter
r Bounding rectangle
double QwtDoubleRange::exactPrevValue () const [protected, inherited]¶
Returns the exact previous value.double QwtDoubleRange::exactValue () const [protected, inherited]¶
Returns the exact value. The exact value is the value which QwtDoubleRange::value would return if the value were not adjusted to the step raster. It differs from the current value only if QwtDoubleRange::fitValue or QwtDoubleRange::incValue have been used before. This function is intended for internal use in derived classes.void QwtAbstractSlider::fitValue (doublevalue) [virtual, slot, inherited]¶
Set the slider's value to the nearest integer multiple of the step size. Parameters:value Value
See also:
setValue(), incValue()
void QwtWheel::getScrollMode (const QPoint &p, int &scrollMode, int &direction) [protected, virtual]¶
Determine the scrolling mode and direction corresponding to a specified point. Parameters:p point
scrollMode scrolling mode
direction direction
double QwtWheel::getValue (const QPoint &p) [protected, virtual]¶
Determine the value corresponding to a specified point. Implements QwtAbstractSlider.void QwtDoubleRange::incPages (intnPages) [virtual, inherited]¶
Increment the value by a specified number of pages. Parameters:nPages Number of pages to increment. A
negative number decrements the value.
Warning:
The Page size is specified in the
constructor.
void QwtAbstractSlider::incValue (intsteps) [virtual, slot, inherited]¶
Increment the value by a specified number of steps. Parameters:steps number of steps
See also:
setValue()
int QwtWheel::internalBorder () const Returns:¶
Internal border width of the wheel.
See also:
setInternalBorder()
bool QwtAbstractSlider::isReadOnly () const [inherited] In read only mode the slider can't be controlled by mouse or keyboard.¶
Returns:true if read only
See also:
setReadOnly()
bool QwtAbstractSlider::isValid () const [inline, inherited] See also:¶
QwtDblRange::isValid()
void QwtAbstractSlider::keyPressEvent (QKeyEvent *e) [protected, virtual, inherited] Handles key events¶
- •
- Key_Down, KeyLeft
Decrement by 1
- •
- Key_Up, Key_Right
Increment by 1
e Key event
See also:
isReadOnly()
void QwtWheel::layoutWheel (boolupdate = true) [protected]¶
Recalculate the slider's geometry and layout based on.double QwtWheel::mass () const [virtual] Returns:¶
mass
double QwtDoubleRange::maxValue () const [inherited]¶
Returns the value of the second border of the range. maxValue returns the value which has been specified as the second parameter in QwtDoubleRange::setRange. See also:setRange()
QSize QwtWheel::minimumSizeHint () const [virtual]¶
Return a minimum size hint. Warning:The return value is based on the wheel
width.
double QwtDoubleRange::minValue () const [inherited]¶
Returns the value at the first border of the range. minValue returns the value which has been specified as the first parameter in setRange(). See also:setRange()
void QwtAbstractSlider::mouseMoveEvent (QMouseEvent *e) [protected, virtual, inherited] Mouse Move Event handler¶
Parameters:e Mouse event
void QwtAbstractSlider::mousePressEvent (QMouseEvent *e) [protected, virtual, inherited] Mouse press event handler¶
Parameters:e Mouse event
void QwtAbstractSlider::mouseReleaseEvent (QMouseEvent *e) [protected, virtual, inherited] Mouse Release Event handler¶
Parameters:e Mouse event
Qt::Orientation QwtAbstractSlider::orientation () const [inherited] Returns:¶
Orientation
See also:
setOrientation()
int QwtDoubleRange::pageSize () const [inherited]¶
Returns the page size in steps.void QwtWheel::paintEvent (QPaintEvent *e) [protected, virtual]¶
Qt Paint Event.void QwtWheel::paletteChange (const QPalette &) [protected, virtual]¶
Call update() when the palette changes.bool QwtDoubleRange::periodic () const [inherited]¶
Returns true if the range is periodic. See also:setPeriodic()
double QwtDoubleRange::prevValue () const [protected, inherited]¶
Returns the previous value.void QwtDoubleRange::rangeChange () [protected, virtual, inherited]¶
Notify a change of the range. This virtual function is called whenever the range changes. The default implementation does nothing. Reimplemented in QwtCounter, QwtDial, and QwtSlider.void QwtWheel::resizeEvent (QResizeEvent *e) [protected, virtual]¶
Qt Resize Event.void QwtWheel::setColorArray () [protected]¶
Set up the color array for the background pixmap.void QwtWheel::setInternalBorder (intw)¶
Set the internal border width of the wheel. The internal border must not be smaller than 1 and is limited in dependence on the wheel's size. Values outside the allowed range will be clipped. The internal border defaults to 2. Parameters:w border width
See also:
internalBorder()
void QwtWheel::setMass (doubleval) [virtual]¶
Set the mass of the wheel. Assigning a mass turns the wheel into a flywheel. Parameters:val the wheel's mass
void QwtWheel::setOrientation (Qt::Orientationo) [virtual]¶
Set the wheel's orientation. Parameters:o Orientation. Allowed values are
Qt::Horizontal and Qt::Vertical. Defaults to Qt::Horizontal.
See also:
QwtAbstractSlider::orientation()
void QwtDoubleRange::setPeriodic (booltf) [inherited]¶
Make the range periodic. When the range is periodic, the value will be set to a point inside the interval such thatpoint = value + n * width .fi
if the user tries to set a new value which is outside the range. If the range is nonperiodic (the default), values outside the range will be clipped.
Parameters:
tf true for a periodic range
void QwtAbstractSlider::setPosition (const QPoint &p) [protected, virtual, inherited] Move the slider to a specified point, adjust the value and emit signals if necessary.¶
void QwtDoubleRange::setRange (doublevmin, doublevmax, doublevstep = 0.0, intpageSize = 1) [inherited]¶
Specify range and step size. Parameters:vmin lower boundary of the interval
vmax higher boundary of the interval
vstep step width
pageSize page size in steps
Warning:
- •
- A change of the range changes the value if it lies outside the new range. The current value will *not* be adjusted to the new step raster.
- •
- vmax < vmin is allowed.
- •
- If the step size is left out or set to zero, it will be set to 1/100 of the interval length.
- •
- If the step size has an absurd value, it will be corrected to a better one.
void QwtAbstractSlider::setReadOnly (boolreadOnly) [virtual, slot, inherited] En/Disable read only mode¶
In read only mode the slider can't be controlled by mouse or keyboard. Parameters:readOnly Enables in case of true
See also:
isReadOnly()
void QwtDoubleRange::setStep (doublevstep) [inherited]¶
Change the step raster. Parameters:vstep new step width
Warning:
The value will not be adjusted to the
new step raster.
void QwtWheel::setTickCnt (intcnt)¶
Adjust the number of grooves in the wheel's surface. The number of grooves is limited to 6 <= cnt <= 50. Values outside this range will be clipped. The default value is 10. Parameters:cnt Number of grooves per 360
degrees
See also:
tickCnt()
void QwtWheel::setTotalAngle (doubleangle)¶
Set the total angle which the wheel can be turned. One full turn of the wheel corresponds to an angle of 360 degrees. A total angle of n*360 degrees means that the wheel has to be turned n times around its axis to get from the minimum value to the maximum value. The default setting of the total angle is 360 degrees. Parameters:angle total angle in degrees
See also:
totalAngle()
void QwtAbstractSlider::setTracking (boolenable) [inherited]¶
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.
enable true (enable) or false (disable)
tracking.
void QwtAbstractSlider::setUpdateTime (intt) [inherited]¶
Specify the update interval for automatic scrolling. Parameters:t update interval in milliseconds
See also:
getScrollMode()
void QwtAbstractSlider::setValid (boolvalid) [inline, inherited] Parameters:¶
valid true/false
See also:
QwtDblRange::isValid()
void QwtAbstractSlider::setValue (doubleval) [virtual, slot, inherited]¶
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. Parameters:val new value
See also:
fitValue()
void QwtWheel::setViewAngle (doubleangle)¶
Specify the visible portion of the wheel. You may use this function for fine-tuning the appearance of the wheel. The default value is 175 degrees. The value is limited from 10 to 175 degrees. Parameters:angle Visible angle in degrees
See also:
viewAngle(),
setTotalAngle()
void QwtWheel::setWheelWidth (intw)¶
Set the width of the wheel. Corresponds to the wheel height for horizontal orientation, and the wheel width for vertical orientation. Parameters:w the wheel's width
QSize QwtWheel::sizeHint () const [virtual] Returns:¶
a size hint
void QwtAbstractSlider::sliderMoved (doublevalue) [signal, inherited] This signal is emitted when the user moves the slider with the mouse.¶
Parameters:value new value
void QwtAbstractSlider::sliderPressed () [signal, inherited] This signal is emitted when the user presses the movable part of the slider (start ScrMouse Mode).¶
void QwtAbstractSlider::sliderReleased () [signal, inherited] This signal is emitted when the user releases the movable part of the slider.¶
double QwtDoubleRange::step () const [inherited] Returns:¶
the step size
See also:
setStep(), setRange()
void QwtDoubleRange::stepChange () [protected, virtual, inherited]¶
Notify a change of the step size. This virtual function is called whenever the step size changes. The default implementation does nothing.void QwtAbstractSlider::stopMoving () [inherited]¶
Stop updating if automatic scrolling is active.int QwtWheel::tickCnt () const Returns:¶
Number of grooves in the wheel's
surface.
See also:
setTickCnt()
void QwtAbstractSlider::timerEvent (QTimerEvent *e) [protected, virtual, inherited] Qt timer event¶
Parameters:e Timer event
double QwtWheel::totalAngle () const Returns:¶
Total angle which the wheel can be
turned.
See also:
setTotalAngle()
double QwtDoubleRange::value () const [inherited]¶
Returns the current value. Reimplemented in QwtCounter.void QwtWheel::valueChange () [protected, virtual]¶
Notify value change. Reimplemented from QwtAbstractSlider.void QwtAbstractSlider::valueChanged (doublevalue) [signal, inherited]¶
Notify a change of value. In the default setting (tracking enabled), this signal will be emitted every time the value changes ( see setTracking() ). Parameters:value new value
double QwtWheel::viewAngle () const Returns:¶
Visible portion of the wheel
See also:
setViewAngle(),
totalAngle()
void QwtAbstractSlider::wheelEvent (QWheelEvent *e) [protected, virtual, inherited] Wheel Event handler¶
Parameters:e Whell event
Author¶
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