Heavy bug w/ BackgroundImages

kaju74

I've created a two-page report which has different background images their pages. Now I create multiple reports (using PreprareReport(True/False)) and I get AV's or the images where sometimes shuffled (image1 on page2, image2 on page1, no image, ...).

Any ideas?

AlexTZ

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

kaju74

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

...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

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

kaju74

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

...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)'.