CanvasPicker::CanvasPicker(Plot *plot):
QObject(plot),
d_selectedCurve(NULL),
d_selectedPoint(-1)
{
qDebug() << __FILE__ << __FUNCTION__;
QwtPlotCanvas *canvas = (QwtPlotCanvas*) plot->canvas();
canvas->installEventFilter(this);
// We want the focus, but no focus rect. The
// selected point will be highlighted instead.
canvas->setFocusPolicy(Qt::StrongFocus);
#ifndef QT_NO_CURSOR
canvas->setCursor(Qt::PointingHandCursor);
#endif
canvas->setFocusIndicator(QwtPlotCanvas::ItemFocusIndicator);
canvas->setFocus();
mousePressed = false;
accelerate = 0;
}
CanvasPicker::CanvasPicker( QwtPlot *plot ):
QObject( plot ),
d_selectedCurve( NULL ),
d_selectedPoint( -1 )
{
QwtPlotCanvas *canvas = qobject_cast<QwtPlotCanvas *>( plot->canvas() );
canvas->installEventFilter( this );
// We want the focus, but no focus rect. The
// selected point will be highlighted instead.
canvas->setFocusPolicy( Qt::StrongFocus );
#ifndef QT_NO_CURSOR
canvas->setCursor( Qt::PointingHandCursor );
#endif
canvas->setFocusIndicator( QwtPlotCanvas::ItemFocusIndicator );
canvas->setFocus();
const char *text =
"All points can be moved using the left mouse button "
"or with these keys:\n\n"
"- Up:\t\tSelect next curve\n"
"- Down:\t\tSelect previous curve\n"
"- Left, ´-´:\tSelect next point\n"
"- Right, ´+´:\tSelect previous point\n"
"- 7, 8, 9, 4, 6, 1, 2, 3:\tMove selected point";
canvas->setWhatsThis( text );
shiftCurveCursor( true );
}
CanvasPicker::CanvasPicker(Graph *graph):
QObject(graph)
{
pointSelected = false;
d_editing_marker = 0;
QwtPlotCanvas *canvas = graph->canvas();
canvas->installEventFilter(this);
}
CanvasPicker::CanvasPicker( QwtPlot* plot ): QObject( plot ), m_isEnabled( false ), m_dragAndDropInProgress( false ),
m_typeOfItemsToDrag( -1 ), m_itemToPick( 0 )
{
QwtPlotCanvas* canvas = qobject_cast<QwtPlotCanvas*>( plot->canvas() );
canvas->installEventFilter( this );
m_isEnabled = true;
canvas->setFocusPolicy( Qt::StrongFocus );
canvas->setFocusIndicator( QwtPlotCanvas::ItemFocusIndicator );
canvas->setFocus();
}
void CanvasPicker::setEnabled( bool enabled )
{
if( m_isEnabled != enabled )
{
QwtPlotCanvas* canvas = qobject_cast<QwtPlotCanvas*>( plot()->canvas() );
m_isEnabled = enabled;
if( enabled )
canvas->installEventFilter( this );
else
canvas->removeEventFilter( this );
}
}
LineChartPicker::LineChartPicker(QwtPlot *plot) :
QwtPlotPicker(plot->canvas()),
p(plot)
{
QwtPlotCanvas *canvas = plot->canvas();
canvas->installEventFilter(this);
canvas->setFocusPolicy(Qt::StrongFocus);
canvas->setMouseTracking(true);
canvas->setFocusIndicator(QwtPlotCanvas::ItemFocusIndicator);
canvas->setFocus();
}
DialogFunction::DialogFunction( const LinearFunction::Description::Ptr& pDescription,
const QPolygonF& curveSamples,
QWidget* pParent)
: QDialog(pParent)
, _pDescription(pDescription)
, _indexSelectedPoint(-1)
, _relativeIndex(0)
{
setupUi(this);
widgetPlot->setMinimumSize(1,1);
widgetPlot->setAxisScale(QwtPlot::xBottom, _pDescription->xMin, _pDescription->xMax);
widgetPlot->setAxisScale(QwtPlot::yLeft, _pDescription->yMin, _pDescription->yMax);
widgetPlot->setAxisMaxMinor(QwtPlot::yLeft, 2);
widgetPlot->setAxisMaxMinor(QwtPlot::xBottom, 2);
widgetPlot->setCanvasBackground(QColor(Qt::black));
widgetPlot->setAxisTitle(QwtPlot::xBottom, _pDescription->szLabelX);
widgetPlot->setAxisTitle(QwtPlot::yLeft, _pDescription->szLabelY);
_pCurve.reset(new QwtPlotCurve());
_pCurve->setStyle(QwtPlotCurve::Lines);
_pCurve->setPen(Qt::white);
_pCurve->setSymbol(new QwtSymbol(QwtSymbol::Diamond, Qt::lightGray, _pCurve->pen(), QSize(8,8)));
QwtArraySeriesData<QPointF>* pSeries = static_cast<QwtArraySeriesData<QPointF>*>(_pCurve->data());
if (pSeries)
{
_pCurve->setSamples(curveSamples);
}
_pCurve->attach(widgetPlot);
QwtPlotGrid* pGrid = new QwtPlotGrid;
pGrid->setMajorPen(QPen(Qt::gray, 0, Qt::DotLine));
pGrid->attach(widgetPlot);
QwtPlotCanvas* pPlotCanvas = static_cast<QwtPlotCanvas*>(widgetPlot->canvas());
pPlotCanvas->installEventFilter(this);
pPlotCanvas->setMouseTracking(true);
}
/*!
\brief Draw a set of points of a curve.
When observing an measurement while it is running, new points have to be
added to an existing curve. drawCurve can be used to display them avoiding
a complete redraw of the canvas.
Setting plot()->canvas()->setAttribute(Qt::WA_PaintOutsidePaintEvent, true);
will result in faster painting, if the paint engine of the canvas widget
supports this feature.
\param from Index of the first point to be painted
\param to Index of the last point to be painted. If to < 0 the
curve will be painted to its last point.
\sa drawCurve(), drawSymbols()
*/
void QwtPlotCurve::draw(int from, int to) const
{
if ( !plot() )
return;
QwtPlotCanvas *canvas = plot()->canvas();
#if QT_VERSION >= 0x040000
#if 0
if ( canvas->paintEngine()->type() == QPaintEngine::OpenGL )
{
/*
OpenGL alway repaint the complete widget.
So for this operation OpenGL is one of the slowest
environments.
*/
canvas->repaint();
return;
}
#endif
if ( !canvas->testAttribute(Qt::WA_WState_InPaintEvent) &&
!canvas->testAttribute(Qt::WA_PaintOutsidePaintEvent) )
{
/*
We save curve and range in helper and call repaint.
The helper filters the Paint event, to repeat
the QwtPlotCurve::draw, but now from inside the paint
event.
*/
QwtPlotCurvePaintHelper helper(this, from, to);
canvas->installEventFilter(&helper);
const bool noSystemBackground =
canvas->testAttribute(Qt::WA_NoSystemBackground);
canvas->setAttribute(Qt::WA_NoSystemBackground, true);
canvas->repaint();
canvas->setAttribute(Qt::WA_NoSystemBackground, noSystemBackground);
return;
}
#endif
const QwtScaleMap xMap = plot()->canvasMap(xAxis());
const QwtScaleMap yMap = plot()->canvasMap(yAxis());
if ( canvas->testPaintAttribute(QwtPlotCanvas::PaintCached) &&
canvas->paintCache() && !canvas->paintCache()->isNull() )
{
QPainter cachePainter((QPixmap *)canvas->paintCache());
cachePainter.translate(-canvas->contentsRect().x(),
-canvas->contentsRect().y());
draw(&cachePainter, xMap, yMap, from, to);
}
#if QT_VERSION >= 0x040000
if ( canvas->testAttribute(Qt::WA_WState_InPaintEvent) )
{
QPainter painter(canvas);
painter.setClipping(true);
painter.setClipRect(canvas->contentsRect());
draw(&painter, xMap, yMap, from, to);
}
else
#endif
{
QPainter *painter = d_data->guardedPainter.begin(canvas);
draw(painter, xMap, yMap, from, to);
}
}
/*!
\brief Draw a set of points of a seriesItem.
When observing an measurement while it is running, new points have to be
added to an existing seriesItem. drawSeries can be used to display them avoiding
a complete redraw of the canvas.
Setting plot()->canvas()->setAttribute(Qt::WA_PaintOutsidePaintEvent, true);
will result in faster painting, if the paint engine of the canvas widget
supports this feature.
\param seriesItem Item to be painted
\param from Index of the first point to be painted
\param to Index of the last point to be painted. If to < 0 the
series will be painted to its last point.
*/
void QwtPlotDirectPainter::drawSeries(
QwtPlotAbstractSeriesItem *seriesItem, int from, int to )
{
if ( seriesItem == NULL || seriesItem->plot() == NULL )
return;
QwtPlotCanvas *canvas = seriesItem->plot()->canvas();
const QRect canvasRect = canvas->contentsRect();
const bool hasBackingStore =
canvas->testPaintAttribute( QwtPlotCanvas::BackingStore )
&& canvas->backingStore() && !canvas->backingStore()->isNull();
if ( hasBackingStore )
{
QPainter painter( const_cast<QPixmap *>( canvas->backingStore() ) );
if ( d_data->hasClipping )
painter.setClipRegion( d_data->clipRegion );
renderItem( &painter, canvasRect, seriesItem, from, to );
if ( testAttribute( QwtPlotDirectPainter::FullRepaint ) )
{
canvas->repaint();
return;
}
}
bool immediatePaint = true;
if ( !canvas->testAttribute( Qt::WA_WState_InPaintEvent ) )
{
immediatePaint = false;
}
if ( immediatePaint )
{
if ( !d_data->painter.isActive() )
{
reset();
d_data->painter.begin( canvas );
canvas->installEventFilter( this );
}
if ( d_data->hasClipping )
{
d_data->painter.setClipRegion(
QRegion( canvasRect ) & d_data->clipRegion );
}
else
{
if ( !d_data->painter.hasClipping() )
d_data->painter.setClipRect( canvasRect );
}
renderItem( &d_data->painter, canvasRect, seriesItem, from, to );
if ( d_data->attributes & QwtPlotDirectPainter::AtomicPainter )
{
reset();
}
else
{
if ( d_data->hasClipping )
d_data->painter.setClipping( false );
}
}
else
{
reset();
d_data->seriesItem = seriesItem;
d_data->from = from;
d_data->to = to;
QRegion clipRegion = canvasRect;
if ( d_data->hasClipping )
clipRegion &= d_data->clipRegion;
canvas->installEventFilter( this );
canvas->repaint(clipRegion);
canvas->removeEventFilter( this );
d_data->seriesItem = NULL;
}
}
/*!
\brief Draw a set of points of a seriesItem.
When observing an measurement while it is running, new points have to be
added to an existing seriesItem. drawSeries can be used to display them avoiding
a complete redraw of the canvas.
Setting plot()->canvas()->setAttribute(Qt::WA_PaintOutsidePaintEvent, true);
will result in faster painting, if the paint engine of the canvas widget
supports this feature.
\param seriesItem Item to be painted
\param from Index of the first point to be painted
\param to Index of the last point to be painted. If to < 0 the
series will be painted to its last point.
*/
void QwtPlotDirectPainter::drawSeries(
QwtPlotAbstractSeriesItem *seriesItem, int from, int to )
{
if ( seriesItem == NULL || seriesItem->plot() == NULL )
return;
QwtPlotCanvas *canvas = seriesItem->plot()->canvas();
if ( canvas->testPaintAttribute( QwtPlotCanvas::PaintCached ) &&
canvas->paintCache() && !canvas->paintCache()->isNull() )
{
QPainter painter( ( QPixmap * )canvas->paintCache() );
painter.translate( -canvas->contentsRect().x(),
-canvas->contentsRect().y() );
renderItem( &painter, seriesItem, from, to );
if ( d_data->attributes & FullRepaint )
{
canvas->repaint();
return;
}
}
bool immediatePaint = true;
if ( !canvas->testAttribute( Qt::WA_WState_InPaintEvent ) &&
!canvas->testAttribute( Qt::WA_PaintOutsidePaintEvent ) )
{
immediatePaint = false;
}
if ( immediatePaint )
{
QwtPlotCanvas *canvas = seriesItem->plot()->canvas();
if ( !( d_data->painter.isActive() &&
d_data->painter.device() == canvas ) )
{
reset();
d_data->painter.begin( canvas );
d_data->painter.setClipping( true );
d_data->painter.setClipRect( canvas->contentsRect() );
canvas->installEventFilter( this );
}
renderItem( &d_data->painter, seriesItem, from, to );
if ( d_data->attributes & AtomicPainter )
reset();
}
else
{
reset();
d_data->seriesItem = seriesItem;
d_data->from = from;
d_data->to = to;
canvas->installEventFilter( this );
canvas->repaint();
canvas->removeEventFilter( this );
d_data->seriesItem = NULL;
}
}
