1 files changed, 177 insertions, 0 deletions
diff --git a/trunk/ext/tk/lib/tk/scrollbar.rb b/trunk/ext/tk/lib/tk/scrollbar.rb
new file mode 100644
index 0000000000..87db46a9f9
--- /dev/null
+++ b/trunk/ext/tk/lib/tk/scrollbar.rb
@@ -0,0 +1,177 @@
+#
+# tk/scrollbar.rb : treat scrollbar widget
+#
+require 'tk'
+
+class Tk::Scrollbar<TkWindow
+  TkCommandNames = ['scrollbar'.freeze].freeze
+  WidgetClassName = 'Scrollbar'.freeze
+  WidgetClassNames[WidgetClassName] = self
+
+  def create_self(keys)
+    @assigned = []
+    @scroll_proc = proc{|*args| 
+      if self.orient == 'horizontal'
+        @assigned.each{|w| w.xview(*args)}
+      else # 'vertical'
+        @assigned.each{|w| w.yview(*args)}
+      end
+    }
+
+    if keys and keys != None
+      unless TkConfigMethod.__IGNORE_UNKNOWN_CONFIGURE_OPTION__
+        #tk_call_without_enc('scrollbar', @path, *hash_kv(keys, true))
+        tk_call_without_enc(self.class::TkCommandNames[0], @path, 
+                            *hash_kv(keys, true))
+      else
+        begin
+          tk_call_without_enc(self.class::TkCommandNames[0], @path, 
+                              *hash_kv(keys, true))
+        rescue
+          tk_call_without_enc(self.class::TkCommandNames[0], @path)
+          keys = __check_available_configure_options(keys)
+          unless keys.empty?
+            begin
+              tk_call_without_enc('destroy', @path)
+            rescue
+              # cannot destroy
+              configure(keys)
+            else
+              # re-create widget
+              tk_call_without_enc(self.class::TkCommandNames[0], @path, 
+                                  *hash_kv(keys, true))
+            end
+          end
+        end
+      end
+    else
+      #tk_call_without_enc('scrollbar', @path)
+      tk_call_without_enc(self.class::TkCommandNames[0], @path)
+    end
+  end
+  private :create_self
+
+  def propagate_set(src_win, first, last)
+    self.set(first, last)
+    if self.orient == 'horizontal'
+      @assigned.each{|w| w.xview('moveto', first) if w != src_win}
+    else # 'vertical'
+      @assigned.each{|w| w.yview('moveto', first) if w != src_win}
+    end
+  end
+
+  def assign(*wins)
+    begin
+      self.command(@scroll_proc) if self.cget('command').cmd != @scroll_proc
+    rescue Exception
+      self.command(@scroll_proc)
+    end
+    orient = self.orient
+    wins.each{|w|
+      @assigned << w unless @assigned.index(w)
+      if orient == 'horizontal'
+        w.xscrollcommand proc{|first, last| self.propagate_set(w, first, last)}
+      else # 'vertical'
+        w.yscrollcommand proc{|first, last| self.propagate_set(w, first, last)}
+      end
+    }
+    Tk.update  # avoid scrollbar trouble
+    self
+  end
+
+  def assigned_list
+    begin
+      return @assigned.dup if self.cget('command').cmd == @scroll_proc
+    rescue Exception
+    end
+    fail RuntimeError, "not depend on the assigned_list"
+  end
+
+  def configure(*args)
+    ret = super(*args)
+    # Tk.update  # avoid scrollbar trouble
+    ret
+  end
+
+  #def delta(deltax=None, deltay=None)
+  def delta(deltax, deltay)
+    number(tk_send_without_enc('delta', deltax, deltay))
+  end
+
+  #def fraction(x=None, y=None)
+  def fraction(x, y)
+    number(tk_send_without_enc('fraction', x, y))
+  end
+
+  def identify(x, y)
+    tk_send_without_enc('identify', x, y)
+  end
+
+  def get
+    #ary1 = tk_send('get').split
+    #ary2 = []
+    #for i in ary1
+    #  ary2.push number(i)
+    #end
+    #ary2
+    list(tk_send_without_enc('get'))
+  end
+
+  def set(first, last)
+    tk_send_without_enc('set', first, last)
+    self
+  end
+
+  def activate(element=None)
+    tk_send_without_enc('activate', element)
+  end
+
+  def moveto(fraction)
+    tk_send_without_enc('moveto', fraction)
+    self
+  end
+
+  def scroll(*args)
+    tk_send_without_enc('scroll', *args)
+    self
+  end
+
+  def scroll_units(num)
+    scroll(num, 'units')
+    self
+  end
+
+  def scroll_pages(num)
+    scroll(num, 'pages')
+    self
+  end
+end
+
+#TkScrollbar = Tk::Scrollbar unless Object.const_defined? :TkScrollbar
+Tk.__set_toplevel_aliases__(:Tk, Tk::Scrollbar, :TkScrollbar)
+
+
+class Tk::XScrollbar<Tk::Scrollbar
+  def create_self(keys)
+    keys = {} unless keys
+    keys['orient'] = 'horizontal'
+    super(keys)
+  end
+  private :create_self
+end
+
+#TkXScrollbar = Tk::XScrollbar unless Object.const_defined? :TkXScrollbar
+Tk.__set_toplevel_aliases__(:Tk, Tk::XScrollbar, :TkXScrollbar)
+
+
+class Tk::YScrollbar<Tk::Scrollbar
+  def create_self(keys)
+    keys = {} unless keys
+    keys['orient'] = 'vertical'
+    super(keys)
+  end
+  private :create_self
+end
+
+#TkYScrollbar = Tk::YScrollbar unless Object.const_defined? :TkYScrollbar
+Tk.__set_toplevel_aliases__(:Tk, Tk::YScrollbar, :TkYScrollbar)