diff options
Diffstat (limited to 'ext/tk/lib/tkextlib/iwidgets/tabset.rb')
-rw-r--r-- | ext/tk/lib/tkextlib/iwidgets/tabset.rb | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/ext/tk/lib/tkextlib/iwidgets/tabset.rb b/ext/tk/lib/tkextlib/iwidgets/tabset.rb index 54e56d0514..618260e8e3 100644 --- a/ext/tk/lib/tkextlib/iwidgets/tabset.rb +++ b/ext/tk/lib/tkextlib/iwidgets/tabset.rb @@ -96,4 +96,48 @@ class Tk::Iwidgets::Tabset tk_call(@path, 'select', index(idx)) self end + + def show_tab(idx) + if index(idx) == 0 + self.start = 0 + return + end + + reutrn unless @canvas ||= self.winfo_children[0] + + delta = 1 if (delta = cget(:gap)) == 'overlap' || + (delta = self.winfo_pixels(delta) + 1) <= 0 + + case cget(:tabpos) + when 's', 'n' + if (head = tabcget(idx, :left)) < 0 + self.start -= head + return + end + tabs_size = @canvas.winfo_width + tab_start, tab_end = @canvas . + find_overlapping(head, 0, head + delta, @canvas.winfo_height) . + find_all{|id| @canvas.itemtype(id) == TkcPolygon} . + map!{|id| bbox = @canvas.bbox(id); [bbox[0], bbox[2]]} . max + + when 'e', 'w' + if (head = tabcget(idx, :top)) < 0 + self.start -= head + return + end + tabs_size = @canvas.winfo_height + tab_start, tab_end = @canvas . + find_overlapping(0, head, @canvas.winfo_width, head + delta) . + find_all{|id| @canvas.itemtype(id) == TkcPolygon} . + map!{|id| bbox = @canvas.bbox(id); [bbox[1], bbox[3]]} . max + end + + if (size = tab_end - tab_start + 1) > tabs_size + self.start -= tab_start + elsif head + size > tabs_size + self.start -= head + size - tabs_size + end + + self + end end |