Hi,

I'm using NightCharts to draw 3 piecharts on a QDialog. When I draw those three charts in paintEvent() and run the program, one of the charts is not painted fully. But when I resize the QDialog manually, the incomplete chart is now fully painted. How do I make this paint properly.

Qt Code: 
  1. void Dialog::paintEvent(QPaintEvent *event)
  2. {
  3.     Q_UNUSED(event);
  4.     QPainter painter(this);
  5.     addGraphs(&painter);
  6. }
  7.  
  8. void Dialog::addGraphs(QPainter *qp)
  9. {
  10.     Nightcharts chart1;
  11.     chart1.setShadows(false);
  12.     chart1.setType(Nightcharts::Pie);
  13.     chart1.setLegendType(Nightcharts::Vertical);
  14.     chart1.setCords(50, 50, 80, 80);
  15.     chart1.addPiece("Item1",QColor(200,10,50),34);
  16.     chart1.addPiece("Item2",Qt::green,27);
  17.     chart1.addPiece("Item3",Qt::cyan,14);
  18.     chart1.addPiece("Item4",Qt::yellow,7);
  19.     chart1.addPiece("Item5",Qt::blue,4);
  20.     chart1.draw(qp);
  21. //    chart1.drawLegend(qp);
  22.  
  23.     Nightcharts chart2;
  24.     chart2.setShadows(false);
  25.     chart2.setType(Nightcharts::Pie);
  26.     chart2.setLegendType(Nightcharts::Vertical);
  27.     chart2.setCords(300, 50, 80, 80);
  28.     chart2.addPiece("Item2",Qt::green,45);
  29.     chart2.addPiece("Item3",Qt::cyan,25);
  30.     chart2.addPiece("Item4",Qt::yellow,15);
  31.     chart2.addPiece("Item5",Qt::blue,15);
  32.     chart2.draw(qp);
  33. //    chart2.drawLegend(qp);
  34.  
  35.     Nightcharts chart3;
  36.     chart3.setShadows(false);
  37.     chart3.setType(Nightcharts::Pie);
  38.     chart3.setLegendType(Nightcharts::Vertical);
  39.     chart3.setCords(550, 50, 80, 80);
  40.     chart3.addPiece("Item1",QColor(200,10,50), 25);
  41.     chart3.addPiece("Item3",Qt::cyan, 25);
  42.     chart3.addPiece("Item4",Qt::yellow, 15);
  43.     chart3.addPiece("Item5",Qt::blue, 15);
  44.     chart3.draw(qp);
  45. //    chart3.drawLegend(qp);
  46. }
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Before resizing QDialog
OnExec.jpg

After resizing QDialog
Resize.jpg

Kindly help me. Thank you.