acces violation when resetting Tradialseries after zooming [SOLVED]

[bbd666]

I'm using one Tchart with one radialseries
I can create the series in runtime and resetting it with .clear and .addXY, it works fine.
But when just before resetting the series I zoomed it with the Mouse I get an external access violation error pointing to :
unit TARadialSeries
line 1415 :    Result := DoublePoint(r * FCos + OriginX, r * FSin + OriginY);

[wp]

Please post a small project showing the issue.

[bbd666]

Here it is.
Thks for your reply.

[wp]

Fixed in main.

If you don't use Laz/main you can patch your own version easy:

• Make a backup copy of file taradialseries.pas (in components/tachart of your Lazarus installation)
• Load unit TARadialSeries into the IDE, find the implementation of procedure TPolarSeries.Draw, scroll down a but until you see the "begin" of the procedure body (there are several nested procedures above it).
• After "if IsEmpty or (not Active) then exit;" add the line "PrepareAngleCache;"
• Save. When you compile your project the next time, TAChart should be rebuilt automatically, and the error should be gone then. If the error still exists, go to "Tools" > "Configure Build Lazarus", check "Clean All" and "After building switch to automatically" and click "Build" to do a clean rebuild of the entire IDE.

Code: Pascal  [Select][+][-]

1. procedure TPolarSeries.Draw(ADrawer: IChartDrawer);
2. [...]
3. var
4.   j: Integer;
5. begin
6.   if IsEmpty or (not Active) then exit;
7.   PrepareAngleCache;    // <------ TO BE ADDED
8.   originPt := ParentChart.GraphToImage(DoublePoint(OriginX, OriginY));
9.   fill := FFilled and (FBrush.Style <> bsClear);  
10.   [...]

 

[bbd666]

Great !
Thanks again.
I really appreciate you spent time explaining in details how to fix the issue in older versions, although you had already fixed it in more recent upgrades.