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.

void QwtPanner::getMouseButton (int &button, int &buttonState) const [inherited]

Get the mouse button.

bool QwtPlotPanner::isAxisEnabled (intaxis) constTest 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::setMouseButton (intbutton, intbuttonState = Qt::NoButton) [inherited]Change the mouse button The defaults are Qt::LeftButton and Qt::NoButton

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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