QwtPlotPanner Class Reference

QwtPlotPanner provides panning of a plot canvas. More...

#include <qwt_plot_panner.h>

Inheritance diagram for QwtPlotPanner:

Inheritance graph
[legend]

List of all members.

Signals

void moved (int dx, int dy)
void panned (int dx, int dy)

Public Member Functions

const QwtPlotCanvascanvas () const
QwtPlotCanvascanvas ()
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
const QwtPlotplot () const
QwtPlotplot ()
 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 QBitmap contentsMask () const
virtual QPixmap grab () const
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

const QwtPlotCanvas * QwtPlotPanner::canvas (  )  const

Return Observed plot canvas.

QwtPlotCanvas * QwtPlotPanner::canvas (  ) 

Return observed plot canvas.

QBitmap QwtPlotPanner::contentsMask (  )  const [protected, virtual]

Calculate a mask from the border mask of the canvas

See also:
QwtPlotCanvas::borderMask()

Reimplemented from QwtPanner.

const QCursor QwtPanner::cursor (  )  const [inherited]

Returns:
Cursor that is active while panning
See also:
setCursor()

bool QwtPanner::eventFilter ( QObject *  object,
QEvent *  event 
) [virtual, inherited]

Event filter.

When isEnabled() the mouse events of the observed widget are filtered.

Parameters:
object Object to be filtered
event Event
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.

QPixmap QwtPanner::grab (  )  const [protected, virtual, inherited]

Grab the widget into a pixmap.

bool QwtPlotPanner::isAxisEnabled ( int  axis  )  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::Orientation  o  )  const [inherited]

Return true if a orientatio is enabled

See also:
orientations(), setOrientations()

void QwtPlotPanner::moveCanvas ( int  dx,
int  dy 
) [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 ( int  dx,
int  dy 
) [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 ( int  dx,
int  dy 
) [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 ( int  key,
int  state = 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 ( int  axis,
bool  on 
)

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 ( bool  on  )  [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 ( int  button,
int  buttonState = Qt::NoButton 
) [inherited]

Change the mouse button The defaults are Qt::LeftButton and Qt::NoButton

void QwtPanner::setOrientations ( Qt::Orientations  o  )  [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 *  keyEvent  )  [protected, virtual, inherited]

Handle a key press event for the observed widget.

Parameters:
keyEvent Key event
See also:
eventFilter(), widgetKeyReleaseEvent()

void QwtPanner::widgetKeyReleaseEvent ( QKeyEvent *  keyEvent  )  [protected, virtual, inherited]

Handle a key release event for the observed widget.

Parameters:
keyEvent Key event
See also:
eventFilter(), widgetKeyReleaseEvent()

void QwtPanner::widgetMouseMoveEvent ( QMouseEvent *  mouseEvent  )  [protected, virtual, inherited]

Handle a mouse move event for the observed widget.

Parameters:
mouseEvent Mouse event
See also:
eventFilter(), widgetMousePressEvent(), widgetMouseReleaseEvent()

void QwtPanner::widgetMousePressEvent ( QMouseEvent *  mouseEvent  )  [protected, virtual, inherited]

Handle a mouse press event for the observed widget.

Parameters:
mouseEvent Mouse event
See also:
eventFilter(), widgetMouseReleaseEvent(), widgetMouseMoveEvent(),

void QwtPanner::widgetMouseReleaseEvent ( QMouseEvent *  mouseEvent  )  [protected, virtual, inherited]

Handle a mouse release event for the observed widget.

Parameters:
mouseEvent Mouse event
See also:
eventFilter(), widgetMousePressEvent(), widgetMouseMoveEvent(),


Generated on Wed Jan 11 15:23:03 2012 for Qwt User's Guide by  doxygen 1.5.9