I see that the UBGraphicsPolygonItem is initialized with NoCache in UBGraphicsItemDelegate.cpp line 77. When I draw another handwriting, the existing PolygonIems in Scene will execute the paint function, as a result the handwriting is drawing slower and slower.
I'm going to change the CacheMode to DeviceCoordinateCache or ItemCoordinateCache, the drawing speed is improved, but the handwriting is fuzzy.
I see that the UBGraphicsPolygonItem is initialized with NoCache in UBGraphicsItemDelegate.cpp line 77. When I draw another handwriting, the existing PolygonIems in Scene will execute the paint function, as a result the handwriting is drawing slower and slower. I'm going to change the CacheMode to DeviceCoordinateCache or ItemCoordinateCache, the drawing speed is improved, but the handwriting is fuzzy.