// +build !windows,!darwin,!plan9 // 23 february 2014 package ui import ( // ... ) // GTK+ 3 makes this easy: controls can tell us what their preferred size is! // ...actually, it tells us two things: the "minimum size" and the "natural size". // The "minimum size" is the smallest size we /can/ display /anything/. The "natural size" is the smallest size we would /prefer/ to display. // The difference? Minimum size takes into account things like truncation with ellipses: the minimum size of a label can allot just the ellipses! // So we use the natural size instead. // There is a warning about height-for-width controls, but in my tests this isn't an issue. // For Areas, we manually save the Area size and use that, just to be safe. func (s *sysData) preferredSize() (width int, height int) { if s.ctype == c_area { return s.areawidth, s.areaheight } _, _, width, height = gtk_widget_get_preferred_size(s.widget) return width, height }