GtkTooltips::set_tip
void set_tip(
GtkWidget
widget
, string tip_text, string tip_private);
Sets the tooltip for a specific widget. The tip_text is will be visible when the user hovers the button for a specific delay.
The tip_private should be a longer description of the function the widget has and can be made visible via a GtkTipsQuery object ("What's this" function).
忘却曲線を使ってこの知識を確実に記憶に残す
