----- Original Message ----- From: LeVA To: Lazarus list Sent: Saturday, December 27, 2003 3:31 PM Subject: [lazarus] a wierd crash in an apllication with StringGrid > Hi! > > I don't know if this is a bug, or not. I'll just explain what happened, > and then it's up to you to decide it. > > I've put a StringGrid to my Form, and filled it up with data from a > file. The StringGrid1.Scrollbars is set to 'SSAUTOVERTICAL', so if the > data is "too much" a scrollbar will appear. I have a 'refresh' button on > the same Form, and when I click on it, the data will be rereaded from > the data file, and the StringGrid will be filled up with the new data. > In the beginning this StringGrid has only two rows. One fixed (for the > headers) and one empty (this is necesary if I have a fixed row). During > the filling up, I'm increasing the RowCount after each row adding, so > the RowCount-1 will be equal with the newly added rows. > When I push that 'refresh' button, I want to reset the RowCount > (otherwise I'll get a lot of empty rows). So, when I click the 'refresh' > button, it's doing this: > StringGrid1.RowCount := 2; > > And the filling comes after that. > > Now the StringGrid has filled, and the scrollbar has appeared, and I > scrolled down until I saw the last element. If then I click the refresh > button, my whole application crashes, and I get this error message in > the console (it's because of the StringGrid1.RowCount := 2, not > especialy of the 'refresh' button): > > TApplication.HandleException List index exceeds bounds (3) > TApplication.HandleException: there was another exception during showing > the first exception > [TgtkObject.Destroy] WARNING: There are 1 unreleased DCs, a detailed > dump follows: > [TgtkObject.Destroy] DCs: 083C0494 > [TgtkObject.Destroy] WARNING: There are 3 unreleased GDIObjects, a > detailed dump follows: > [TgtkObject.Destroy] GDIOs: 08394734 08394794 08394A34 > [TgtkObject.Destroy] gdiBrush: 1 > [TgtkObject.Destroy] gdiFont: 1 > [TgtkObject.Destroy] gdiPen: 1 > > So in the StringGrid if I scrolled down to the last element, and after I > set the rowcount less than the existing rows, it crashes. > Hope that this is understandable, I gathered my whole english knowledge > to write this letter :) I know it could've been better. > Please ask me if you don't understand what the problem is. > > ps.: I have changed my application, so it will only add new rows during > the filling up if it is realy necesary, and I commented the Rowcount > setting out, so it is working fine, but I think that it has to work in > the other way too. > > Thanks! > > Daniel > > > -- > LeVA > > _________________________________________________________________ > To unsubscribe: mail with > "unsubscribe" as the Subject > archives at http://www.lazarus.freepascal.org/mailarchives