QwtPlotPanner - Man Page
Name
QwtPlotPanner —
QwtPlotPanner provides panning of a plot canvas.
Synopsis
#include <qwt_plot_panner.h>
Inherits QwtPanner.
Signals
void moved (int dx, int dy)
void panned (int dx, int dy)
Public Member Functions
QwtPlotCanvas * canvas ()
const QwtPlotCanvas * canvas () const
const QCursor cursor () const
virtual bool eventFilter (QObject *, QEvent *)
void getAbortKey (int &key, int &state) const
void getMouseButton (int &button, int &buttonState) const
bool isAxisEnabled (int axis) const
bool isEnabled () const
bool isOrientationEnabled (Qt::Orientation) const
Qt::Orientations orientations () const
QwtPlot * plot ()
const QwtPlot * plot () const
QwtPlotPanner (QwtPlotCanvas *)
void setAbortKey (int key, int state=Qt::NoButton)
void setAxisEnabled (int axis, bool on)
void setCursor (const QCursor &)
void setEnabled (bool)
void setMouseButton (int button, int buttonState=Qt::NoButton)
void setOrientations (Qt::Orientations)
virtual ~QwtPlotPanner ()
Protected Slots
virtual void moveCanvas (int dx, int dy)
Protected Member Functions
virtual void paintEvent (QPaintEvent *)
virtual void widgetKeyPressEvent (QKeyEvent *)
virtual void widgetKeyReleaseEvent (QKeyEvent *)
virtual void widgetMouseMoveEvent (QMouseEvent *)
virtual void widgetMousePressEvent (QMouseEvent *)
virtual void widgetMouseReleaseEvent (QMouseEvent *)
Detailed Description
QwtPlotPanner provides panning of a plot canvas.
QwtPlotPanner is a panner for a QwtPlotCanvas, that adjusts the scales of the axes after dropping the canvas on its new position.
Together with QwtPlotZoomer and QwtPlotMagnifier powerful ways of navigating on a QwtPlot widget can be implemented easily.
- Note:
The axes are not updated, while dragging the canvas
- See also:
QwtPlotZoomer, QwtPlotMagnifier
Constructor & Destructor Documentation
QwtPlotPanner::QwtPlotPanner (QwtPlotCanvas *canvas) [explicit]
Create a plot panner. The panner is enabled for all axes
- Parameters:
canvas Plot canvas to pan, also the parent object
- See also:
setAxisEnabled()
QwtPlotPanner::~QwtPlotPanner () [virtual]
Destructor.
Member Function Documentation
QwtPlotCanvas * QwtPlotPanner::canvas ()
Return observed plot canvas.
const QwtPlotCanvas * QwtPlotPanner::canvas () const
Return Observed plot canvas.
const QCursor QwtPanner::cursor () const [inherited] Returns
Cursor that is active while panning
See also:
setCursor()
bool QwtPanner::eventFilter (QObject *o, QEvent *e) [virtual, inherited]
Event filter. When isEnabled() the mouse events of the observed widget are filtered.
See also:
widgetMousePressEvent(), widgetMouseReleaseEvent(), widgetMouseMoveEvent()
void QwtPanner::getAbortKey (int &key, int &state) const [inherited]
Get the abort key.
bool QwtPlotPanner::isAxisEnabled (intaxis) const Test if an axis is enabled
- Parameters:
axis Axis, see QwtPlot::Axis
- Returns:
True, if the axis is enabled
- See also:
setAxisEnabled(), moveCanvas()
bool QwtPanner::isEnabled () const [inherited] Returns
true when enabled, false otherwise
See also:
setEnabled, eventFilter()
bool QwtPanner::isOrientationEnabled (Qt::Orientationo) const [inherited] Return true if a orientatio is enabled
See also:
orientations(), setOrientations()
void QwtPlotPanner::moveCanvas (intdx, intdy) [protected, virtual, slot] Adjust the enabled axes according to dx/dy
- Parameters:
dx Pixel offset in x direction
dy Pixel offset in y direction- See also:
QwtPanner::panned()
void QwtPanner::moved (intdx, intdy) [signal, inherited] Signal emitted, while the widget moved, but panning is not finished.
- Parameters:
dx Offset in horizontal direction
dy Offset in vertical direction
Qt::Orientations QwtPanner::orientations () const [inherited]
Return the orientation, where paning is enabled.
void QwtPanner::paintEvent (QPaintEvent *pe) [protected, virtual, inherited]
Paint event. Repaint the grabbed pixmap on its current position and fill the empty spaces by the background of the parent widget.
- Parameters:
pe Paint event
void QwtPanner::panned (intdx, intdy) [signal, inherited] Signal emitted, when panning is done
- Parameters:
dx Offset in horizontal direction
dy Offset in vertical direction
const QwtPlot * QwtPlotPanner::plot () const
Return plot widget, containing the observed plot canvas.
QwtPlot * QwtPlotPanner::plot ()
Return plot widget, containing the observed plot canvas.
void QwtPanner::setAbortKey (intkey, intstate = Qt::NoButton) [inherited] Change the abort key The defaults are Qt::Key_Escape and Qt::NoButton
- Parameters:
key Key ( See Qt::Keycode )
state State
void QwtPlotPanner::setAxisEnabled (intaxis, boolon)
En/Disable an axis. Axes that are enabled will be synchronized to the result of panning. All other axes will remain unchanged.
- Parameters:
axis Axis, see QwtPlot::Axis
on On/Off- See also:
isAxisEnabled(), moveCanvas()
void QwtPanner::setCursor (const QCursor &cursor) [inherited] Change the cursor, that is active while panning The default is the cursor of the parent widget.
- Parameters:
cursor New cursor
- See also:
setCursor()
void QwtPanner::setEnabled (boolon) [inherited]
En/disable the panner. When enabled is true an event filter is installed for the observed widget, otherwise the event filter is removed.
- Parameters:
on true or false
- See also:
isEnabled(), eventFilter()
void QwtPanner::setOrientations (Qt::Orientationso) [inherited] Set the orientations, where panning is enabled The default value is in both directions: Qt::Horizontal | Qt::Vertical
/param o Orientation
void QwtPanner::widgetKeyPressEvent (QKeyEvent *ke) [protected, virtual, inherited] Handle a key press event for the observed widget.
- Parameters:
ke Key event
- See also:
eventFilter(), widgetKeyReleaseEvent()
void QwtPanner::widgetKeyReleaseEvent (QKeyEvent *) [protected, virtual, inherited] Handle a key release event for the observed widget.
See also:
eventFilter(), widgetKeyReleaseEvent()
void QwtPanner::widgetMouseMoveEvent (QMouseEvent *me) [protected, virtual, inherited] Handle a mouse move event for the observed widget.
- Parameters:
me Mouse event
- See also:
eventFilter(), widgetMousePressEvent(), widgetMouseReleaseEvent()
void QwtPanner::widgetMousePressEvent (QMouseEvent *me) [protected, virtual, inherited] Handle a mouse press event for the observed widget.
- Parameters:
me Mouse event
- See also:
eventFilter(), widgetMouseReleaseEvent(), widgetMouseMoveEvent(),
void QwtPanner::widgetMouseReleaseEvent (QMouseEvent *me) [protected, virtual, inherited] Handle a mouse release event for the observed widget.
- Parameters:
me Mouse event
- See also:
eventFilter(), widgetMousePressEvent(), widgetMouseMoveEvent(),
Author
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