Wt

Hello Christophe,

This is definitely not the intention. It's not immediately clear to me from the source code what the exact problem is. Could you make a small test case for it?

BR,
Wim.

I'm seeing the same error often with my app, but I've not had time to look into the cause of the problem yet. However, I've made the following observation that might help... My page has five sliders on it and the range of some of the sliders is initially [0, 0]. The error is displayed when the page is loaded and the thumb for these sliders is not drawn. If I modify my code so that the sliders never have an empty range, then no error is displayed and the thumb is drawn.

Hopefully this is case repeatable at your end and it is the same problem as noted by Christophe.

Cheers,

Dan

Do something like this to reproduce the problem :

    model_ = new WStandardItemModel(0, 3);
    model_->insertRow(0);
    model_->setData(0, 0, boost::any(0));
    model_->setData(0, 1, boost::any(1));
    model_->setData(0, 2, boost::any());    <--- no value here intentionnally for the second series

    setModel(model_); 
    setXSeriesColumn(0);
    setLegendEnabled(false); 
    setType(ScatterPlot);

    WPen pen;
    pen.setColor(WColor(0, 0, 0, 100));
    pen.setWidth(1);

    WAxis& xAxis = axis(XAxis);
    WAxis& yAxis = axis(YAxis);
    xAxis.setLocation(ZeroValue);
    yAxis.setLocation(ZeroValue);

    xAxis.setLabelFormat("%.2f");
    yAxis.setLabelFormat("%.2f");
    xAxis.setLabelInterval(0.05);
    yAxis.setLabelInterval(0.05);
    xAxis.setRange(-0.1, 1.1);
    yAxis.setRange(-0.1, 1.2);
    xAxis.setGridLinesEnabled(true);
    yAxis.setGridLinesEnabled(true);
    xAxis.setGridLinesPen(pen);
    yAxis.setGridLinesPen(pen);

    setPlotAreaPadding(0, Left);
    setPlotAreaPadding(0, Right);
    setPlotAreaPadding(0, Bottom);
    setPlotAreaPadding(0, Top);

    setMargin(5, Top | Bottom);
    setMargin(WLength::Auto, Left | Right);
    setBackground(WBrush(WColor(150, 150, 150)));

    // Add the curves
    WDataSeries s(1, LineSeries);
    s.setShadow(WShadow(3, 3, WColor(0, 0, 0, 127), 2));
    s.setMarker(Chart::SquareMarker);
    s.setMarkerSize(4);
    s.setMarkerPen(WPen(WColor(0, 0, 0)));
    s.setMarkerBrush(WBrush(WColor(255, 255, 0)));
    s.setPen(WPen(WColor(0, 255, 0, 128)));

    //s.setLabelsEnabled(XAxis);
    //s.setLabelsEnabled(YAxis);
    addSeries(s);

    WDataSeries selection(2, PointSeries);
    selection.setMarker(Chart::SquareMarker);
    selection.setMarkerPen(WPen(WColor(0, 0, 0)));
    selection.setMarkerBrush(WBrush(WColor(255, 0, 0)));
    selection.setMarkerSize(5);
    selection.setLabelsEnabled(XAxis);
    selection.setLabelsEnabled(YAxis);   <--- this will cause the crash when the chart is rendered
    addSeries(selection);

Hey Christophe,

I've found the problem with the test case -- thanks. I am not sure that this is also the cause for the first problem ?
I will push the fix to public git soon (hopefully by the end of the weekend).

Regards,
koen