This method is deprecated. Colors can be set via styles.
This method sets the foreground and background colors for the tooltips.
On linux this method doesn't work. Use the styles instead.
例 48. How to set the color of tooltips
$style = 'style "tooltips" { bg[NORMAL] = "#ff6060" } widget "gtk-tooltips" style "tooltips"'; gtk::rc_parse_string( $style);
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