Creates a new GtkLabel, containing the text in str.
If characters in str are preceded by an underscore, they are
underlined. If you need a literal underscore character in a label, use
'__' (two underscores). The first underlined character represents a
keyboard accelerator called a mnemonic. The mnemonic key can be used
to activate another widget, chosen automatically, or explicitly using
setMnemonicWidget().
If setMnemonicWidget() is not called, then the first activatable ancestor of the Label
will be chosen as the mnemonic widget. For instance, if the
label is inside a button or menu item, the button or menu item will
automatically become the mnemonic widget and be activated by
the mnemonic.
Creates a new GtkLabel, containing the text in str. If characters in str are preceded by an underscore, they are underlined. If you need a literal underscore character in a label, use '__' (two underscores). The first underlined character represents a keyboard accelerator called a mnemonic. The mnemonic key can be used to activate another widget, chosen automatically, or explicitly using setMnemonicWidget().
If setMnemonicWidget() is not called, then the first activatable ancestor of the Label will be chosen as the mnemonic widget. For instance, if the label is inside a button or menu item, the button or menu item will automatically become the mnemonic widget and be activated by the mnemonic.