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QwtPlotCanvas
Langue: en
Version: 121649 (mandriva - 01/05/08)
Section: 3 (Bibliothèques de fonctions)
Sommaire
- NAME
- SYNOPSIS
- Detailed Description
- Member Enumeration Documentation
- Constructor & Destructor Documentation
- Member Function Documentation
- void QwtPlotCanvas::drawCanvas (QPainter * painter = NULL) [protected]
- void QwtPlotCanvas::drawContents (QPainter *) [protected, virtual]
- void QwtPlotCanvas::drawFocusIndicator (QPainter *) [protected, virtual]
- QwtPlotCanvas::FocusIndicator QwtPlotCanvas::focusIndicator () const
- void QwtPlotCanvas::invalidatePaintCache ()
- const QPixmap * QwtPlotCanvas::paintCache () const
- QPixmap * QwtPlotCanvas::paintCache ()
- void QwtPlotCanvas::setFocusIndicator (FocusIndicator focusIndicator)
- void QwtPlotCanvas::setPaintAttribute (PaintAttribute attribute, bool on = true)
- bool QwtPlotCanvas::testPaintAttribute (PaintAttribute attribute) const
- Author
NAME
QwtPlotCanvas -SYNOPSIS
Detailed Description
Canvas of a QwtPlot.
See also:
- QwtPlot
Definition at line 28 of file qwt_plot_canvas.h.
Public Types
enum PaintAttribute { PaintCached = 1, PaintPacked = 2 }
enum FocusIndicator { NoFocusIndicator, CanvasFocusIndicator, ItemFocusIndicator }
Public Member Functions
void setFocusIndicator (FocusIndicator)
FocusIndicator focusIndicator () const
void setPaintAttribute (PaintAttribute, bool on=true)
bool testPaintAttribute (PaintAttribute) const
QPixmap * paintCache ()
const QPixmap * paintCache () const
void invalidatePaintCache ()
Protected Member Functions
QwtPlotCanvas (QwtPlot *)
virtual ~QwtPlotCanvas ()
virtual void hideEvent (QHideEvent *)
virtual void paintEvent (QPaintEvent *)
virtual void drawContents (QPainter *)
virtual void drawFocusIndicator (QPainter *)
void drawCanvas (QPainter *painter=NULL)
Friends
class QwtPlot
Member Enumeration Documentation
enum QwtPlotCanvas::FocusIndicator
Focus indicator.
- •
- NoFocusIndicator
Don't paint a focus indicator
- •
- CanvasFocusIndicator
The focus is related to the complete canvas. Paint the focus indicator using paintFocus()
- •
- ItemFocusIndicator
The focus is related to an item (curve, point, ...) on the canvas. It is up to the application to display a focus indication using f.e. highlighting.
See also:
- setFocusIndicator(), focusIndicator(), paintFocus()
Definition at line 80 of file qwt_plot_canvas.h.
enum QwtPlotCanvas::PaintAttribute
Paint attributes.
- •
- PaintCached
Paint double buffered and reuse the content of the pixmap buffer for some spontaneous repaints that happen when a plot gets unhidden, deiconified or changes the focus. Disabling the cache will improve the performance for incremental paints (using QwtPlotCurve::draw).
- •
- PaintPacked
Suppress system background repaints and paint it together with the canvas contents. Painting packed might avoid flickering for expensive repaints, when there is a notable gap between painting the background and the plot contents.
The default setting enables PaintCached and PaintPacked
See also:
- setPaintAttribute(), testPaintAttribute(), paintCache()
Definition at line 56 of file qwt_plot_canvas.h.
Constructor & Destructor Documentation
QwtPlotCanvas::QwtPlotCanvas (QwtPlot *) [explicit, protected]
Sets a cross cursor, enables QwtPlotCanvas::PaintCached.
Definition at line 50 of file qwt_plot_canvas.cpp.
References setPaintAttribute().
QwtPlotCanvas::~QwtPlotCanvas () [protected, virtual]
Destructor.
Definition at line 75 of file qwt_plot_canvas.cpp.
Member Function Documentation
void QwtPlotCanvas::drawCanvas (QPainter * painter = NULL) [protected]
Draw the the canvas
Paints all plot items to the contentsRect(), using QwtPlot::drawCanvas and updates the paint cache.
See also:
- QwtPlot::drawCanvas, setPaintAttributes(), testPaintAttributes()
Definition at line 259 of file qwt_plot_canvas.cpp.
void QwtPlotCanvas::drawContents (QPainter *) [protected, virtual]
Redraw the canvas, and focus rect.
Definition at line 228 of file qwt_plot_canvas.cpp.
Referenced by paintEvent().
void QwtPlotCanvas::drawFocusIndicator (QPainter *) [protected, virtual]
Draw the focus indication.
Definition at line 328 of file qwt_plot_canvas.cpp.
References QwtPainter::drawFocusRect().
QwtPlotCanvas::FocusIndicator QwtPlotCanvas::focusIndicator () const
Returns:
- Focus indicator
See also:
- FocusIndicator, setFocusIndicator
Definition at line 185 of file qwt_plot_canvas.cpp.
void QwtPlotCanvas::invalidatePaintCache ()
Invalidate the internal paint cache.
Definition at line 164 of file qwt_plot_canvas.cpp.
Referenced by QwtPlot::replot().
const QPixmap * QwtPlotCanvas::paintCache () const
Return the paint cache, might be null.
Definition at line 158 of file qwt_plot_canvas.cpp.
QPixmap * QwtPlotCanvas::paintCache ()
Return the paint cache, might be null.
Definition at line 152 of file qwt_plot_canvas.cpp.
void QwtPlotCanvas::setFocusIndicator (FocusIndicator focusIndicator)
Set the focus indicator
See also:
- FocusIndicator, focusIndicator
Definition at line 175 of file qwt_plot_canvas.cpp.
void QwtPlotCanvas::setPaintAttribute (PaintAttribute attribute, bool on = true)
Changing the paint attributes.
Parameters:
- attribute Paint attribute
on On/Off
The default setting enables PaintCached and PaintPacked
See also:
- testPaintAttribute(), drawCanvas(), drawContents(), paintCache()
Definition at line 90 of file qwt_plot_canvas.cpp.
Referenced by QwtPlotCanvas().
bool QwtPlotCanvas::testPaintAttribute (PaintAttribute attribute) const
Test wether a paint attribute is enabled
Parameters:
- attribute Paint attribute
Returns:
- true if the attribute is enabled
Definition at line 146 of file qwt_plot_canvas.cpp.
Referenced by QwtPlot::replot().
Author
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