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Prior to 2.4, GTK+ offered two widgets for the task of selecting one item from a list of options. GtkOptionMenu presents the list of options as a menu while GtkCombo presents them in a Windows-style list popup. The only difference between the two is that a GtkCombo allows to manually edit the selected value, while the GtkOptionMenu does not.
In GTK+ 2.4, a unified API for list selection was introduced, with GtkComboBox for the non-editable case and GtkComboBoxEntry for the editable case. The selection of the display style — menu or list — is no longer done at the API level, but has been made themeable via the style property “appears-as-list”.
Here is an example of a simple, but typical use of GtkOptionMenu:
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In order to react to the user's selection, connect to the “changed”
signal on the option menu and use gtk_option_menu_get_history()
to retrieve the index of the selected item.
And here is how it would be done with a GtkComboBox:
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In order to react to the user's selection, connect to the
“changed” signal and use gtk_combo_box_get_active()
to retrieve the index of the selected item.
A slightly more complex example involving images:
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can be done using a GtkComboBox as follows:
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