func set_relative_indicators(bufp unsafe.Pointer, viewp unsafe.Pointer, offsets []int, indicators []unsafe.Pointer) {
buf := (*C.GtkTextBuffer)(bufp)
view := (*C.GtkTextView)(viewp)
var it C.GtkTextIter
C.gtk_text_buffer_get_start_iter(buf, &it)
var location C.GdkRectangle
var left, top C.gint
var indicator *C.GtkWidget
for i, offset := range offsets {
C.gtk_text_iter_set_offset(&it, C.gint(offset))
C.gtk_text_view_get_iter_location(view, &it, &location)
C.gtk_text_view_buffer_to_window_coords(view, C.GTK_TEXT_WINDOW_WIDGET, C.gint(location.x), C.gint(location.y), &left, &top)
indicator = (*C.GtkWidget)(indicators[i])
top += 8
if left >= C.gint(0) && top >= C.gint(0) {
C.gtk_widget_set_margin_start(indicator, left)
C.gtk_widget_set_margin_top(indicator, top)
C.gtk_widget_show(indicator)
}
}
}
// SetMarginTop is a wrapper around gtk_widget_set_margin_top().
func (v *Widget) SetMarginTop(margin int) {
C.gtk_widget_set_margin_top(v.native(), C.gint(margin))
}
func reset_relative_indicators(indicators []unsafe.Pointer) {
for _, indicator := range indicators {
C.gtk_widget_set_margin_start((*C.GtkWidget)(indicator), C.gint(0))
C.gtk_widget_set_margin_top((*C.GtkWidget)(indicator), C.gint(0))
}
}