Disable buttons, do some processing and re-enable buttons

Hi !

I'm currently writing a quite complex installer. I proprose some choices to the user, each choice proprosed through a single separate page. I currently process each choice when the user clicks the "next" button of the corresponding page. However the processing can be long (I extract files from a zip archive via the nsisunz plugin).

However I discovered that I could click the "next" button while the processing was in progress (NSIS currently in the nsisunz extracting function). So it seems like if I was able to launch the extraction twice... and the whole application crashes on a Windows fatal error.

I thought I would be able to disable the buttons, extract everything and then enable them. I found how to do it in this forums. However it seems it doesn't work in my case. The buttons get disabled when using as "disable/enable buttons -> exit function" but they don't when using as "disable buttons -> call nsisunz -> enable buttons -> exit function". It seems that the window messages aren't handled (I suppose they are handled when I exit the function... too late).

A solution would be to collect all choices and then have a progress page (all buttons would be disabled in the PRE function). Then, when the processing would be finished, they would be re-enabled. However this would require me to rewrite some big parts of my installer script.

Does anybody know how I could handle this problem ?

Thansk forward,
Seb

You shouldn't do any processing until the InstFiles page, where you should do processing in Sections. Most people don't think about this... but what if you extract files in a custom page and then the user chooses to cancel the setup afterwards. You've either got to delete these files, or let the user do it fumble over it.

-Stu

Hi.

Thanks for your reply. I agree with you about the processing which must be done in the InstFiles page. However in the case I described, the processing was done in a page AFTER the InstFiles.

Anyway I was doing a lot of stuff before the InstFiles page and I was doing also a bunch of stuff on pages after the InstFiles page. I rewrote everything to show choices to the user before that page and then to process them in the InstFiles page using sections. It works perfectly.

Thanks a lot for your help / remark.