conflicting packages
QwtPanner(3) | Qwt User's Guide | QwtPanner(3) |
NAME¶
QwtPanner -SYNOPSIS¶
#include <qwt_panner.h> Inherited by QwtPlotPanner.Signals¶
void moved (int dx, int dy)
Public Member Functions¶
QwtPanner (QWidget *parent)
Protected Member Functions¶
virtual void paintEvent (QPaintEvent *)
Detailed Description¶
QwtPanner provides panning of a widget. QwtPanner grabs the contents of a widget, that can be dragged in all directions. The offset between the start and the end position is emitted by the panned signal. QwtPanner grabs the content of the widget into a pixmap and moves the pixmap around, without initiating any repaint events for the widget. Areas, that are not part of content are not painted while panning in in process. This makes panning fast enough for widgets, where repaints are too slow for mouse movements. For widgets, where repaints are very fast it might be better to implement panning manually by mapping mouse events into paint events.Constructor & Destructor Documentation¶
QwtPanner::QwtPanner (QWidget *parent)¶
Creates an panner that is enabled for the left mouse button. Parameters:parent Parent widget to be panned
Member Function Documentation¶
const QCursor QwtPanner::cursor () const¶
Returns:Cursor that is active while panning
See also:
setCursor()
bool QwtPanner::eventFilter (QObject *o, QEvent *e) [virtual]¶
Event filter. When isEnabled() the mouse events of the observed widget are filtered. See also:widgetMousePressEvent(),
widgetMouseReleaseEvent(), widgetMouseMoveEvent()
bool QwtPanner::isEnabled () const¶
Returns:true when enabled, false otherwise
See also:
setEnabled, eventFilter()
bool QwtPanner::isOrientationEnabled (Qt::Orientationo) const¶
Return true if a orientatio is enabled See also:orientations(), setOrientations()
void QwtPanner::moved (intdx, intdy) [signal]¶
Signal emitted, while the widget moved, but panning is not finished. Parameters:dx Offset in horizontal direction
dy Offset in vertical direction
void QwtPanner::paintEvent (QPaintEvent *pe) [protected], [virtual]¶
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]¶
Signal emitted, when panning is done Parameters:dx Offset in horizontal direction
dy Offset in vertical direction
void QwtPanner::setAbortKey (intkey, intstate = Qt::NoButton)¶
Change the abort key The defaults are Qt::Key_Escape and Qt::NoButton Parameters:key Key ( See Qt::Keycode )
state State
void QwtPanner::setCursor (const QCursor &cursor)¶
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)¶
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)¶
Change the mouse button The defaults are Qt::LeftButton and Qt::NoButtonvoid QwtPanner::setOrientations (Qt::Orientationso)¶
Set the orientations, where panning is enabled The default value is in both directions: Qt::Horizontal | Qt::Vertical /param o Orientationvoid QwtPanner::widgetKeyPressEvent (QKeyEvent *ke) [protected], [virtual]¶
Handle a key press event for the observed widget. Parameters:ke Key event
See also:
eventFilter(),
widgetKeyReleaseEvent()
void QwtPanner::widgetKeyReleaseEvent (QKeyEvent *) [protected], [virtual]¶
Handle a key release event for the observed widget. See also:eventFilter(),
widgetKeyReleaseEvent()
void QwtPanner::widgetMouseMoveEvent (QMouseEvent *me) [protected], [virtual]¶
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]¶
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]¶
Handle a mouse release event for the observed widget. Parameters:me Mouse event
See also:
eventFilter(), widgetMousePressEvent(),
widgetMouseMoveEvent(),
Author¶
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