CODEWITHSUNDEEP
cgtk3gdk
William Breathitt Gray
William Breathitt Gray

Reputation: 11986

gtk_widget_add_accelerator with no GdkModifierType

I'm trying to add an accelerator to a "Play" GTK+ 3.0 menu item using the following C code:

gtk_widget_add_accelerator(play, "activate", accel_group, GDK_KEY_F5, NULL, GTK_ACCEL_VISIBLE);

I want the "Play" menu item to be activated when the user presses the F5 key. However, when I try to compile I get the following error:

/usr/include/gtk-3.0/gtk/gtkwidget.h:504:9: note: expected 'GdkModifierType' but argument is of type 'void *'

I don't want to add a modifier, just have the menu item activate when the user presses the F5 key. I realized that I can pass a 0 as the argument (since GdkModifierType is just a binary mask), but is there a preferred way over this solution -- perhaps a preprocessor macro called GDK_NONE_MASK or something to that effect?

Upvotes: 2

Views: 614

Answers (1)

ulidtko
ulidtko

Reputation: 15634

That's right, you're not supposed to pass pointers (e.g. NULL) to an enum parameter. Attempting to do so is wrong, and this is what the compiler told you.

You can get away with 0. Implicit conversion from ints to enums will kick in.

To be more explicit, you can write (GdkModifierType)0 as the argument.

Upvotes: 1

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