Disable section

[JoeMcC00L]

Good evening ladies and gents,

I noticed a pretty cool quirk with NSIS. If you want to have a deselected grayed-out section, you use the syntax:

Section /o SectionName
SectionIn RO
...
SectionEnd

Any ideas on how to make this happen inside a function? Specifically, I want to make a function that searches for a component on the client's computer. If the component is there and up-to-date, the section should be grayed-out. Currently I have an InstallOptions page that somewhat emulates what I'm going for, but this way would be so much easier to support.

Thanks for any help,
Joe

[kichik]

That's no quirk. It's simply a section with SF_RO and without SF_SELECTED.

[JoeMcC00L]

Ah, well my apologies for the mistaken terminology. So what I'm gathering from your post is, in order to check if a section is selected, I need to check the variable ${SF_SELECTED}. Is changing this in the background as simple as using !define? If that's the case, I could just do this in a function, no?

Thanks
Joe

[kichik]

In order to check if a section is selected, you need to get its flags using SectionGetFlags and check if the ${SF_SELECTED} flag is set. It's not a variable and I'm not sure what you mean by changing it in the background.

To set the flags, you can use SectionSetFlags. Clear the SF_SELECTED flag, and set the SF_RO flag.

You can use the macros in Sections.nsh for all of the above. Use SectionFlagIsSet to check if a section is selected, SetSectionFlag to set a section flag and ClearSectionFlag to clear a section flag. The LogicLib has macros to handle section selection as well. Examples\LogicLib.nsi has an example of this in the ComponentsLeave function.

[JoeMcC00L]

Sorry for the ambiguous wording. Your suggestion of using SetSectionFlag and ClearSectionFlag macros were exactly what I was looking for. I guess I must of overlooked that solution (my bad).

Thanks
Joe