View Full Version : how to solve the limit of plot length
baoxuefei771
29th May 2011, 11:11
I have to draw a curve that maybe 6000 meters long,but when i draw the curve use qwt plot it can not draw it correctly
how should I do ? Thank you !!
You can see that part of the plot seems ok,but the rest part of the plot just black....
6492
The black areas are covering the frames of the canvas - looks like there are some widgets that are layered on top of the canvas.
Check the widgets in your application ( for example dump the widget tree ) and try to find out which widgets are at these positions.
Also check the realtime example for using scrollbars. Using a scrollview like in your screenshot is not a good idea.
Uwe
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