Heavy bug w/ BackgroundImages

Comments

• AlexTZ

  November 2004 edited 1:52AM

  It works well for me. Could you send me a demo project with this error? tz@fast-report.com
• kaju74

  November 2004 edited 1:52AM

  If I create a simple demo app loading different images, all seems to work well - aaarrrgghhh! But my report in my 'life' application is more complex and very hard to extract, but this is, what it contains:
  
  - One report for multiple outputs (yearcalendar, monthcalendar, weekplan, ...)
  - A 'main' page containing the header & footer as well as a masterband with one row containing all subreports as 'cross'-reports
  - Each cross-report has it's own groupheaders & masterbands
  - Some objects & variables were created using scripts
  - The 'main' page should have a variable background image
  - The 'legend' page (with detailed adress-informations) should have a variable background image
  
  A single report contains the 'main'-page including the 'cross'-subreport (multiple pages) and an additional legend page.
  
  A batch functionality in my app (loop) creates several of these 'single'-reports by using '.PrepareReport(True/False). The background images are references by global variables (initialized with '.FindObject()').
  
  Now - and only sometimes - if the second report is being created, the reference of the background image seems to be invalid:
  
  Unit: frxClass
  Method: TfrxPictureView.SetPicture
  
  But, the variable itself isn't 'nil'!
  
  I think, redesigning a background image on the second report (merging) fails sometimes - maybe only on complex reports using several pages with cross-reports and report-merging (PrepareReport(True) -> PrepareReport(False) -> PrepareReport(False) -> ...)
  
  Please help!?!?!?!?
• kaju74

  November 2004 edited 1:52AM

  ...and what also happens:
  
  - I assign "Pic1" on the first report (= 1 Page using '.PrepareReport(True)')
  - I assign "Pic2" on the second report (= 1 Page using '.PrepareReport(False)')
  
  The created report shows:
  
  - Page1: Pic1
  - Page2: Pic1 (and sometimes NO PIC)
• AlexTZ

  November 2004 edited 1:52AM

  Sorry, I cannot reproduce this behaviour on my test project.
• kaju74

  November 2004 edited 1:52AM

  If I get more 'spare'-time, I try to extract the necessarry code into a sample app. For now, I had to disable the background images if I use the '.PrepareReport(True/False)' feature, o/w my app crashes all three times
• kaju74

  November 2004 edited November 2004

  ...maybe it's a reference pointer problem. Sometimes, I got a 'pointer' A/V, sometimes an 'Abstract'-Error.
  
  If I use the following code snippet just before creating a new report:
  

   ? MyPage := TfrxReportPage(FastReport.FindObject('MainPage'));
   ? MyPage.BackgroundImage.LoadFromFile('xxxx');
  

  
  ...it seems that 'MyPage' sometimes didn't points to the valid address of 'MainPage'. If I trace the source, the 'SetImage' method occurs into an AV cause the passed object (value) seems to be invalid.
  
  BTW: This happens only if I create more than one report using 'PrepareReport(True)' and then (using the same report template) 'PrepareReport(False)'.