问题
I have a collection of GtkEntry widgets, some of which are editable and focusable, and some of which are not. I would like to find out which, if any, of them currently has text selected, in order to implement an Edit->Copy menu item. Is there any way to do this other than iterating over all the widgets until gtk_editable_get_selection_bounds returns true?
I am currently sidestepping the issue by calling gtk_clipboard_get(GDK_SELECTION_PRIMARY) but from what the docs say, that's not portable (and will also pick up text selected anywhere within the current display, not just from within my application).
回答1:
Have you tried gtk_window_get_focus ()? Users are frequently interacting with entries, so it may work for you. The documentation says that it "retrieves the current focused widget within the window." You can look it by yourself here. Then, compare if the widget retrieved is one of your entries.
Once you get the focused entry, perhaps you would like to get its text using gtk_entry_get_text () , though, it will get all the text in the entry. If this does not fit your purposes, the solution might be using gtk_editable_copy_clipboard () which copies the contents of the currently selected content in the editable (of course, cast the entry to editable) and puts it on the clipboard. Then if it applies, paste what was copied using gtk_editable_paste_clipboard ().
来源：https://stackoverflow.com/questions/10508810/find-out-which-gtk-widget-has-the-current-selection