func fnPaint(ev *qt5.PaintEvent, w *qt5.Widget) {
p := qt5.NewPainter()
defer p.Close()
p.Begin(w)
p.DrawPoint(qt5.Pt(10, 10))
p.DrawLine(qt5.Pt(10, 10), qt5.Pt(100, 100))
p.End()
}
func (p *MyWidget) paintEvent(e *qt5.PaintEvent) {
paint := qt5.NewPainter()
defer paint.Close()
paint.Begin(p)
paint.SetFont(p.font)
paint.DrawLines(p.line)
paint.SetFont(p.font)
paint.DrawText(qt5.Pt(100, 100), "draw test")
for _, v := range p.lines {
//paint.DrawLines(v)
paint.DrawPolyline(v)
}
paint.End()
runtime.GC()
}