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https://github.com/GoldenCheetah/GoldenCheetah.git
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c44758c5ad
Upgrade to QWT 6.0.1, but still uses a locally patched copy since support for 8 axes has not been included, despite it being a relatively simple patch. Fixes #634. Fixes #567.
112 lines
2.6 KiB
C++
112 lines
2.6 KiB
C++
// code borrowed from event_filter qwt examples
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// and modified for GC LTM purposes
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#include <qapplication.h>
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#include <qevent.h>
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#include <qwhatsthis.h>
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#include <qpainter.h>
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#include <qwt_plot.h>
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#include <qwt_symbol.h>
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#include <qwt_scale_map.h>
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#include <qwt_plot_canvas.h>
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#include <qwt_plot_curve.h>
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#include "LTMCanvasPicker.h"
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#include <QDebug>
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LTMCanvasPicker::LTMCanvasPicker(QwtPlot *plot):
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QObject(plot),
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d_selectedCurve(NULL),
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d_selectedPoint(-1)
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{
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QwtPlotCanvas *canvas = plot->canvas();
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canvas->installEventFilter(this);
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// We want the focus, but no focus rect. The
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canvas->setFocusPolicy(Qt::StrongFocus);
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canvas->setFocusIndicator(QwtPlotCanvas::ItemFocusIndicator);
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}
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bool LTMCanvasPicker::event(QEvent *e)
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{
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if ( e->type() == QEvent::User )
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{
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//showCursor(true);
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return true;
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}
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return QObject::event(e);
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}
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bool LTMCanvasPicker::eventFilter(QObject *object, QEvent *e)
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{
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if ( object != (QObject *)plot()->canvas() )
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return false;
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switch(e->type())
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{
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default:
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QApplication::postEvent(this, new QEvent(QEvent::User));
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break;
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case QEvent::MouseButtonPress:
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select(((QMouseEvent *)e)->pos(), true);
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break;
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case QEvent::MouseMove:
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select(((QMouseEvent *)e)->pos(), false);
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break;
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}
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return QObject::eventFilter(object, e);
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}
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// Select the point at a position. If there is no point
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// deselect the selected point
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void LTMCanvasPicker::select(const QPoint &pos, bool clicked)
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{
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QwtPlotCurve *curve = NULL;
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double dist = 10e10;
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int index = -1;
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const QwtPlotItemList& itmList = plot()->itemList();
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for ( QwtPlotItemIterator it = itmList.begin();
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it != itmList.end(); ++it )
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{
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if ( (*it)->rtti() == QwtPlotItem::Rtti_PlotCurve )
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{
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QwtPlotCurve *c = (QwtPlotCurve*)(*it);
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double d = -1;
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int idx = c->closestPoint(pos, &d);
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if ( d != -1 && d < dist )
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{
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curve = c;
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index = idx;
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dist = d;
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}
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}
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}
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d_selectedCurve = NULL;
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d_selectedPoint = -1;
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if ( curve && dist < 10 ) // 10 pixels tolerance
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{
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// picked one
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d_selectedCurve = curve;
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d_selectedPoint = index;
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if (clicked)
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pointClicked(curve, index); // emit
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else
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pointHover(curve, index); // emit
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} else {
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// didn't
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if (clicked)
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pointClicked(NULL, -1); // emit
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else
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pointHover(NULL, -1); // emit
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}
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}
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