AV when scrolling mouse in XE2

rbuser

Hi

I'm busy porting my app from Delphi 2009 to XE2. I'm using the following
code to scroll the mouse-wheel in TppViewer:

ReportViewer.ScrollBox.VertScrollBar.Position :=
ReportViewer.ScrollBox.VertScrollBar.Position - (WheelDelta div 5);

The above code worked perfectly with Delphi 2009 but i'm getting an AV in
XE2 as soon as I use the wheel to scroll.

I'm using the latest version of Reportbuilder and Delphi XE2 (Update 3).

nardmoseley

RB 14 introduces a new scrollable page preview. The vertical scrollbar can
be used to scroll through the pages, the pages are generated in a background
thread.

One option is to modify your code to call Viewer.VerticalScroll like this...

Viewer.VerticalScroll(WheelDelta div 5);

Another option is to set Report.PreviewFormSettings.SinglePageOnly to True,
and then the old single page preview is used. This will preserve your old
code.



-
Nard Moseley
Digital Metaphors
www.digital-metaphors.com