Jordan Stinson wrote:
> Hi,
> I was wondering how the top level menu for GIMP is created (The one
> with these items: "File", "Edit", "Select", "View", "Image", etc. ). I
> want to add a menu item to this menu and I'm kind of lost as to where
> to start. If someone could tell me where to hunt around in the code
> for this and give me an explanation of how it's done, that would be
> great! Even better, is there some documentation online about this kind
> of thing?
The GIMP menus are created using the GTK+ menu APIs, often with some
thin wrapper on top. The actual instantiation of the menu is in the
gimp_display_shell_new() function:
shell->menubar =
gtk_ui_manager_get_widget (GTK_UI_MANAGER (shell->menubar_manager),
"/image-menubar");
Some keywords to look up: GtkUIManager, GtkAction. The menu structure is
in menus/image-menu.xml.in. Note that you will need to install the
modified file before GIMP can find it.
To add a new menu item these are the rough steps:
1. Edit image-menu.xml.in
2. Add a GimpAction in <menu>-actions.c, e.g. image-actions.c if you are
going to add something under the Image menu. Then just follow the
pattern from there.
As a general tip, you will learn a lot from studying the commit history.
There have been several occasions where menu items have been added and
modified for example, so just looking up a commit for this and studying
the diff will tell you how to do it.
/ Martin
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