Background image based on dataset

Hi all !

I can't find any good way to have this working :
in my report, i want to set up a background image based on the result of a dataset.
My dataset fetchs an information (whether the report's datas are validated or not), and i want to use this information to set a "not valid" background image on my report.

I tried setting a persistent global variable in :
- the onrender event of a dataitem in my masterpage footer
- the oncreate event of the said dataitem
- the onfetch event of my dataset

and using a getPersistentGlobalVariable in my report beforeFactory / beforeRender, with no success.

I used timestamps to track the events order, and it appears that the beforeFactory / beforeRender events of the report are triggered before any other event (even the events of the elements in the masterpage).

Do you have any idea on how to use my dataset to put my background image ?

--
Lionel

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mwilliams

Hi Lionel,

What does your data look like in your dataSet? This way I can see how you determine what background image you use. Thanks.

Lol-Lefou

Hi mwilliams,

My dataset returns an integer indicating the number of invalid data (ie : select count * as nb from table where valide=0).

In my report, i want to use this information (the number of invalid) to set up my background

if nb > 0
{
masterpage.getStyle().setBackgroundImage("image.jpg")
}

Thanks for your help

mwilliams

Lionel,

What version of BIRT are you using? This way I can attach an example you can run if I get one working. Thanks.

Lol-Lefou

Hi mwilliams,

Sorry for the delay, it was a long day.

I'm using birt version 2.5.0

Thanks for your help

--
Lionel

mwilliams

Lionel,

Here's what I ended up doing:

Create a second master page for your report. Make the background image of each of them different. In your dataSet's onFetch script, grab the value returned by the count function and set it to a variable.

In the first element in your report, check this new variable against 0 and change the master page used depending like below:

if (validCount > 0){
this.getStyle().masterPage = "NewSimpleMasterPage";
}

Hope this helps. Let me know if you have any questions or need an example.

Lol-Lefou

Thanks mwilliams, this can be a useful help !

mwilliams

Lionel,

Glad to help. Let us know whenever you have questions!