QwtPlotGLCanvas man page
QwtPlotGLCanvas — An alternative canvas for a QwtPlot derived from QGLWidget.
Synopsis
#include <qwt_plot_glcanvas.h>
Inherits QGLWidget.
Public Types
enum Shadow { Plain = QFrame::Plain, Raised = QFrame::Raised, Sunken = QFrame::Sunken } Frame shadow. "
enum Shape { NoFrame = QFrame::NoFrame, Box = QFrame::Box, Panel = QFrame::Panel } Frame shape. "
Public Slots
void replot ()
Calls repaint()
Public Member Functions
QwtPlotGLCanvas (QwtPlot *=NULL)
Constructor.
virtual ~QwtPlotGLCanvas ()
Destructor.
void setFrameStyle (int style)
int frameStyle () const
void setFrameShadow (Shadow)
Shadow frameShadow () const
void setFrameShape (Shape)
Shape frameShape () const
void setLineWidth (int)
int lineWidth () const
void setMidLineWidth (int)
int midLineWidth () const
int frameWidth () const
QRect frameRect () const
Q_INVOKABLE QPainterPath borderPath (const QRect &) const
virtual bool event (QEvent *)
Protected Member Functions
virtual void paintEvent (QPaintEvent *)
virtual void drawBackground (QPainter *)
virtual void drawBorder (QPainter *)
virtual void drawItems (QPainter *)
Detailed Description
An alternative canvas for a QwtPlot derived from QGLWidget.
QwtPlotGLCanvas implements the very basics to act as canvas inside of a QwtPlot widget. It might be extended to a full featured alternative to QwtPlotCanvas in a future version of Qwt.
Even if QwtPlotGLCanvas is not derived from QFrame it imitates its API. When using style sheets it supports the box model - beside backgrounds with rounded borders.
- See also:
QwtPlot::setCanvas(), QwtPlotCanvas
- Note:
With Qt4 you might want to use the QPaintEngine::OpenGL paint engine ( see QGL::setPreferredPaintEngine() ). On a Linux test system QPaintEngine::OpenGL2 shows very basic problems like translated geometries.
Member Enumeration Documentation
enum QwtPlotGLCanvas::Shadow
Frame shadow. Unfortunately it is not possible to use QFrame::Shadow as a property of a widget that is not derived from QFrame. The following enum is made for the designer only. It is safe to use QFrame::Shadow instead.
Enumerator
- Plain
QFrame::Plain.
- Raised
QFrame::Raised.
- Sunken
QFrame::Sunken.
enum QwtPlotGLCanvas::Shape
Frame shape. Unfortunately it is not possible to use QFrame::Shape as a property of a widget that is not derived from QFrame. The following enum is made for the designer only. It is safe to use QFrame::Shadow instead.
- Note:
QFrame::StyledPanel and QFrame::WinPanel are unsuported and will be displayed as QFrame::Panel.
Constructor & Destructor Documentation
QwtPlotGLCanvas::QwtPlotGLCanvas (QwtPlot * plot = NULL) [explicit]
Constructor.
- Parameters:
plot Parent plot widget
- See also:
QwtPlot::setCanvas()
Member Function Documentation
QPainterPath QwtPlotGLCanvas::borderPath (const QRect & rect) const
- Returns:
Empty path
void QwtPlotGLCanvas::drawBackground (QPainter * painter) [protected], [virtual]
Draw the background of the canvas
- Parameters:
painter Painter
void QwtPlotGLCanvas::drawBorder (QPainter * painter) [protected], [virtual]
Draw the border of the canvas
- Parameters:
painter Painter
void QwtPlotGLCanvas::drawItems (QPainter * painter) [protected], [virtual]
Draw the plot items
- Parameters:
painter Painter
- See also:
QwtPlot::drawCanvas()
bool QwtPlotGLCanvas::event (QEvent * event) [virtual]
Qt event handler for QEvent::PolishRequest and QEvent::StyleChange
- Parameters:
event Qt Event
- Returns:
See QGLWidget::event()
QRect QwtPlotGLCanvas::frameRect () const
- Returns:
The rectangle where the frame is drawn in.
QwtPlotGLCanvas::Shadow QwtPlotGLCanvas::frameShadow () const
- Returns:
Frame shadow
- See also:
setFrameShadow(), QFrame::setFrameShadow()
QwtPlotGLCanvas::Shape QwtPlotGLCanvas::frameShape () const
- Returns:
Frame shape
- See also:
setFrameShape(), QFrame::frameShape()
int QwtPlotGLCanvas::frameStyle () const
- Returns:
The bitwise OR between a frameShape() and a frameShadow()
- See also:
setFrameStyle(), QFrame::frameStyle()
int QwtPlotGLCanvas::frameWidth () const
- Returns:
Frame width depending on the style, line width and midline width.
int QwtPlotGLCanvas::lineWidth () const
- Returns:
Line width of the frame
- See also:
setLineWidth(), midLineWidth()
int QwtPlotGLCanvas::midLineWidth () const
- Returns:
Midline width of the frame
- See also:
setMidLineWidth(), lineWidth()
void QwtPlotGLCanvas::paintEvent (QPaintEvent * event) [protected], [virtual]
Paint event
- Parameters:
event Paint event
- See also:
QwtPlot::drawCanvas()
void QwtPlotGLCanvas::setFrameShadow (Shadow shadow)
Set the frame shadow
- Parameters:
shadow Frame shadow
- See also:
frameShadow(), setFrameShape(), QFrame::setFrameShadow()
void QwtPlotGLCanvas::setFrameShape (Shape shape)
Set the frame shape
- Parameters:
shape Frame shape
- See also:
frameShape(), setFrameShadow(), QFrame::frameShape()
void QwtPlotGLCanvas::setFrameStyle (int style)
Set the frame style
- Parameters:
style The bitwise OR between a shape and a shadow.
- See also:
frameStyle(), QFrame::setFrameStyle(), setFrameShadow(), setFrameShape()
void QwtPlotGLCanvas::setLineWidth (int width)
Set the frame line width
The default line width is 2 pixels.
- Parameters:
width Line width of the frame
- See also:
lineWidth(), setMidLineWidth()
void QwtPlotGLCanvas::setMidLineWidth (int width)
Set the frame mid line width
The default midline width is 0 pixels.
- Parameters:
width Midline width of the frame
- See also:
midLineWidth(), setLineWidth()
Author
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