#include <qwt_sldbase.h>
Inheritance diagram for QwtSliderBase:

Public Types | |
| enum | ScrollMode { ScrNone, ScrMouse, ScrTimer, ScrDirect, ScrPage } |
Public Slots | |
| virtual void | setValue (double val) |
| virtual void | fitValue (double val) |
| virtual void | incValue (int steps) |
| virtual void | setReadOnly (bool) |
Signals | |
| void | valueChanged (double value) |
| void | sliderPressed () |
| void | sliderReleased () |
| void | sliderMoved (double value) |
Public Member Functions | |
| QwtSliderBase (Qt::Orientation orientation, QWidget *parent=0, const char *name=0, WFlags flags=0) | |
| virtual | ~QwtSliderBase () |
| void | setUpdateTime (int t) |
| void | stopMoving () |
| void | setTracking (bool enable) |
| virtual void | setMass (double val) |
| virtual double | mass () const |
| virtual void | setOrientation (Orientation o) |
| Orientation | orientation () const |
| bool | isReadOnly () const |
Protected Member Functions | |
| void | setPosition (const QPoint &p) |
| virtual void | valueChange () |
| virtual void | timerEvent (QTimerEvent *e) |
| virtual void | mousePressEvent (QMouseEvent *e) |
| virtual void | mouseReleaseEvent (QMouseEvent *e) |
| virtual void | mouseMoveEvent (QMouseEvent *e) |
| virtual void | keyPressEvent (QKeyEvent *e) |
| virtual void | wheelEvent (QWheelEvent *e) |
| virtual double | getValue (const QPoint &p)=0 |
| virtual void | getScrollMode (const QPoint &p, int &scrollMode, int &direction)=0 |
Protected Attributes | |
| int | d_scrollMode |
| double | d_mouseOffset |
| int | d_direction |
| int | d_tracking |
Private Member Functions | |
| void | buttonReleased () |
Private Attributes | |
| int | d_tmrID |
| int | d_updTime |
| int | d_timerTick |
| QTime | d_time |
| double | d_speed |
| double | d_mass |
| Orientation | d_orientation |
| bool | d_readOnly |
QwtSliderBase is a base class for slider widgets. QwtSliderBase handles the 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.
Definition at line 30 of file qwt_sldbase.h.
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Definition at line 38 of file qwt_sldbase.h. |
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Constructor.
Definition at line 18 of file qwt_sldbase.cpp. References d_mass, d_mouseOffset, d_tmrID, d_tracking, d_updTime, QwtDblRange::setRange(), and setValue(). |
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Destructor.
Definition at line 37 of file qwt_sldbase.cpp. References d_tmrID. |
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Emits a valueChanged() signal if necessary.
Definition at line 141 of file qwt_sldbase.cpp. References d_tracking, QwtDblRange::prevValue(), QwtDblRange::value(), and valueChanged(). Referenced by mouseReleaseEvent(), and timerEvent(). |
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Set the slider's value to the nearest integer multiple of the step size.
Reimplemented from QwtDblRange. Definition at line 491 of file qwt_sldbase.cpp. References d_scrollMode, QwtDblRange::fitValue(), ScrMouse, and stopMoving(). |
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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. QwtSliderBase knows the following modes:
Implemented in QwtDial, QwtKnob, QwtSlider, and QwtWheel. Referenced by mousePressEvent(), and wheelEvent(). |
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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.
Implemented in QwtDial, QwtKnob, QwtSlider, and QwtWheel. Referenced by mousePressEvent(), and setPosition(). |
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Increment the value by a specified number of steps.
Reimplemented from QwtDblRange. Definition at line 503 of file qwt_sldbase.cpp. References d_scrollMode, QwtDblRange::incValue(), ScrMouse, and stopMoving(). |
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Definition at line 49 of file qwt_sldbase.cpp. References d_readOnly. Referenced by keyPressEvent(), QwtCompass::keyPressEvent(), mouseMoveEvent(), mousePressEvent(), mouseReleaseEvent(), and wheelEvent(). |
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Reimplemented in QwtCompass. Definition at line 313 of file qwt_sldbase.cpp. References QwtDblRange::incValue(), isReadOnly(), QwtDblRange::isValid(), orientation(), QwtDblRange::prevValue(), sliderMoved(), and QwtDblRange::value(). Referenced by QwtCompass::keyPressEvent(). |
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Reimplemented in QwtWheel. Definition at line 464 of file qwt_sldbase.cpp. References d_mass. Referenced by QwtWheel::mass(). |
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Mouse Move Event handler.
Definition at line 257 of file qwt_sldbase.cpp. References d_mass, d_scrollMode, d_speed, d_time, QwtDblRange::exactPrevValue(), QwtDblRange::exactValue(), isReadOnly(), QwtDblRange::isValid(), QwtDblRange::prevValue(), ScrMouse, setPosition(), sliderMoved(), and QwtDblRange::value(). |
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Mouse press event handler.
Definition at line 98 of file qwt_sldbase.cpp. References d_direction, d_mouseOffset, d_scrollMode, d_speed, d_time, d_timerTick, d_tmrID, d_updTime, getScrollMode(), getValue(), isReadOnly(), QwtDblRange::isValid(), qwtMax, ScrMouse, ScrPage, ScrTimer, sliderPressed(), stopMoving(), and QwtDblRange::value(). |
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Mouse Release Event handler.
Definition at line 149 of file qwt_sldbase.cpp. References buttonReleased(), d_direction, d_mass, d_mouseOffset, d_scrollMode, d_speed, d_time, d_timerTick, d_tmrID, d_updTime, QwtDblRange::fitValue(), QwtDblRange::incPages(), isReadOnly(), QwtDblRange::isValid(), ScrDirect, ScrMouse, ScrNone, ScrPage, ScrTimer, setPosition(), sliderReleased(), QwtDblRange::step(), stopMoving(), and QwtDblRange::value(). |
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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.
Reimplemented in QwtWheel. Definition at line 450 of file qwt_sldbase.cpp. References d_mass. Referenced by QwtWheel::setMass(). |
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Set the orientation.
Definition at line 59 of file qwt_sldbase.cpp. References d_orientation. Referenced by QwtWheel::setOrientation(), and QwtSlider::setOrientation(). |
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Move the slider to a specified point, adjust the value and emit signals if necessary. Definition at line 231 of file qwt_sldbase.cpp. References d_mouseOffset, QwtDblRange::fitValue(), and getValue(). Referenced by mouseMoveEvent(), and mouseReleaseEvent(). |
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Definition at line 43 of file qwt_sldbase.cpp. References d_readOnly. |
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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:
Definition at line 251 of file qwt_sldbase.cpp. References d_tracking. |
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Specify the update interval for automatic scrolling.
Definition at line 89 of file qwt_sldbase.cpp. References d_updTime. Referenced by QwtKnob::QwtKnob(), and QwtWheel::QwtWheel(). |
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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.
Reimplemented from QwtDblRange. Definition at line 478 of file qwt_sldbase.cpp. References d_scrollMode, ScrMouse, QwtDblRange::setValue(), and stopMoving(). Referenced by QwtCompass::keyPressEvent(), and QwtSliderBase(). |
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This signal is emitted when the user moves the slider with the mouse.
Referenced by keyPressEvent(), mouseMoveEvent(), and wheelEvent(). |
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This signal is emitted when the user presses the movable part of the slider (start ScrMouse Mode). Referenced by mousePressEvent(). |
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This signal is emitted when the user releases the movable part of the slider. Referenced by mouseReleaseEvent(). |
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Stop updating if automatic scrolling is active.
Definition at line 75 of file qwt_sldbase.cpp. References d_tmrID. Referenced by fitValue(), incValue(), mousePressEvent(), mouseReleaseEvent(), setValue(), and timerEvent(). |
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Qt timer event.
Definition at line 360 of file qwt_sldbase.cpp. References buttonReleased(), d_direction, d_mass, d_scrollMode, d_speed, d_timerTick, d_tmrID, d_updTime, QwtDblRange::exactValue(), QwtDblRange::fitValue(), QwtDblRange::incPages(), ScrMouse, ScrPage, ScrTimer, QwtDblRange::step(), stopMoving(), and QwtDblRange::value(). |
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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. Reimplemented from QwtDblRange. Reimplemented in QwtDial, QwtKnob, QwtSlider, and QwtWheel. Definition at line 427 of file qwt_sldbase.cpp. References d_tracking, QwtDblRange::value(), and valueChanged(). Referenced by QwtWheel::valueChange(), QwtSlider::valueChange(), QwtKnob::valueChange(), and QwtDial::valueChange(). |
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Notify a change of value. In the default setting (tracking enabled), this signal will be emitted every time the value changes ( see setTracking() ).
Referenced by buttonReleased(), and valueChange(). |
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Qt wheel event.
Definition at line 287 of file qwt_sldbase.cpp. References getScrollMode(), QwtDblRange::incPages(), isReadOnly(), QwtDblRange::isValid(), QwtDblRange::prevValue(), ScrNone, sliderMoved(), QwtDblRange::value(), and WHEEL_DELTA. |
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Definition at line 145 of file qwt_sldbase.h. Referenced by mousePressEvent(), mouseReleaseEvent(), and timerEvent(). |
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Definition at line 156 of file qwt_sldbase.h. Referenced by mass(), mouseMoveEvent(), mouseReleaseEvent(), QwtSliderBase(), setMass(), and timerEvent(). |
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Definition at line 144 of file qwt_sldbase.h. Referenced by QwtKnob::getValue(), QwtDial::getValue(), mousePressEvent(), mouseReleaseEvent(), QwtSliderBase(), and setPosition(). |
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Definition at line 157 of file qwt_sldbase.h. Referenced by orientation(), and setOrientation(). |
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Definition at line 158 of file qwt_sldbase.h. Referenced by isReadOnly(), and setReadOnly(). |
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Definition at line 143 of file qwt_sldbase.h. Referenced by fitValue(), QwtDial::getValue(), incValue(), mouseMoveEvent(), mousePressEvent(), mouseReleaseEvent(), setValue(), and timerEvent(). |
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Definition at line 155 of file qwt_sldbase.h. Referenced by mouseMoveEvent(), mousePressEvent(), mouseReleaseEvent(), and timerEvent(). |
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Definition at line 154 of file qwt_sldbase.h. Referenced by mouseMoveEvent(), mousePressEvent(), and mouseReleaseEvent(). |
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Definition at line 153 of file qwt_sldbase.h. Referenced by mousePressEvent(), mouseReleaseEvent(), and timerEvent(). |
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Definition at line 151 of file qwt_sldbase.h. Referenced by mousePressEvent(), mouseReleaseEvent(), QwtSliderBase(), stopMoving(), timerEvent(), and ~QwtSliderBase(). |
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Definition at line 146 of file qwt_sldbase.h. Referenced by buttonReleased(), QwtSliderBase(), setTracking(), and valueChange(). |
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Definition at line 152 of file qwt_sldbase.h. Referenced by mousePressEvent(), mouseReleaseEvent(), QwtSliderBase(), setUpdateTime(), and timerEvent(). |
1.3.2