wjingyao
24th June 2013, 14:12
hi, i had my graphicsview with about 2000 QGraphicsPathitem.
they are overlay to eachother, the coordinary are very large, about 60000 to -60000
i set transform to make it fit in to the viewport.
i already set the pathitem's pen to cosmetic(true) , pen width is 1.
the view moves smooth when i scrolling ,very good, but!!!
when i set the pathItem's pen width to 2, the scrolling became very very slow!!
why is that?
can i improve it ? i just use the QGraphicsPathItem, no costume item.
they are overlay to eachother, the coordinary are very large, about 60000 to -60000
i set transform to make it fit in to the viewport.
i already set the pathitem's pen to cosmetic(true) , pen width is 1.
the view moves smooth when i scrolling ,very good, but!!!
when i set the pathItem's pen width to 2, the scrolling became very very slow!!
why is that?
can i improve it ? i just use the QGraphicsPathItem, no costume item.