Minus Button sensitivity depends on row items

[snowparrot]

behaviour now: minus button is sensitive except after you put an item into trash.
Behaviour after pull request: if all items arent trashed than you can click the button.

The intention is in a following pull request: the icon changes depending if you select items in the trash or not. If you selected items only in the trash icon of minus button changes and now you can put items out of the trash.

The following request would need a dependency on PixBuf. Is it ok then to add a new dependency?

[Philip-Scott]

I've made a couple of comments regardless the choice of the PR. So that you can get better with coding :)

But to be honest i feel that this is not needed because with your code:

• It would always have to search through all the pages in the current notebook every time you select one
• You can't select trashed pages anymore
• The button should not change. Trash should always be trash

[Philip-Scott]

Remove extra white-space line

[Philip-Scott]

you can replace all of this for minus_button.set_sensitive (all_not_trashed)

[snowparrot]

I think you misunderstood me:

Of course you can still select trashed pages!
Right now: You can click on a page, delete it but later after reselection, minus button still is sensitive. This is very confusing and I was confused when I deleted a page for the first time.

Then: If you reselect a page which is in the trash, you can select it but minus button isn't sensitive so "you can't put it in the trash twice".
This behaviour is much more what a users expects and a huge improvement in UX.

PR changes nothing more.