- vscroll.setMaximum(max);\r
- vscroll.setUnitIncrement(1);\r
- vscroll.setVisibleAmount(1);\r
+ if(canvasWidth>0)\r
+ {\r
+ int max = maxwidth / canvasWidth;\r
+ vscroll.setMaximum(max);\r
+ vscroll.setUnitIncrement(1);\r
+ vscroll.setVisibleAmount(1);\r
+ }\r