1 from Tkinter import *

     2 

     3 class ScrolledList:

     4 

     5     default = "(None)"

     6 

     7     def __init__(self, master, **options):

     8         # Create top frame, with scrollbar and listbox

     9         self.master = master

    10         self.frame = frame = Frame(master)

    11         self.frame.pack(fill="both", expand=1)

    12         self.vbar = vbar = Scrollbar(frame, name="vbar")

    13         self.vbar.pack(side="right", fill="y")

    14         self.listbox = listbox = Listbox(frame, exportselection=0,

    15             background="white")

    16         if options:

    17             listbox.configure(options)

    18         listbox.pack(expand=1, fill="both")

    19         # Tie listbox and scrollbar together

    20         vbar["command"] = listbox.yview

    21         listbox["yscrollcommand"] = vbar.set

    22         # Bind events to the list box

    23         listbox.bind("<ButtonRelease-1>", self.click_event)

    24         listbox.bind("<Double-ButtonRelease-1>", self.double_click_event)

    25         listbox.bind("<ButtonPress-3>", self.popup_event)

    26         listbox.bind("<Key-Up>", self.up_event)

    27         listbox.bind("<Key-Down>", self.down_event)

    28         # Mark as empty

    29         self.clear()

    30 

    31     def close(self):

    32         self.frame.destroy()

    33 

    34     def clear(self):

    35         self.listbox.delete(0, "end")

    36         self.empty = 1

    37         self.listbox.insert("end", self.default)

    38 

    39     def append(self, item):

    40         if self.empty:

    41             self.listbox.delete(0, "end")

    42             self.empty = 0

    43         self.listbox.insert("end", str(item))

    44 

    45     def get(self, index):

    46         return self.listbox.get(index)

    47 

    48     def click_event(self, event):

    49         self.listbox.activate("@%d,%d" % (event.x, event.y))

    50         index = self.listbox.index("active")

    51         self.select(index)

    52         self.on_select(index)

    53         return "break"

    54 

    55     def double_click_event(self, event):

    56         index = self.listbox.index("active")

    57         self.select(index)

    58         self.on_double(index)

    59         return "break"

    60 

    61     menu = None

    62 

    63     def popup_event(self, event):

    64         if not self.menu:

    65             self.make_menu()

    66         menu = self.menu

    67         self.listbox.activate("@%d,%d" % (event.x, event.y))

    68         index = self.listbox.index("active")

    69         self.select(index)

    70         menu.tk_popup(event.x_root, event.y_root)

    71 

    72     def make_menu(self):

    73         menu = Menu(self.listbox, tearoff=0)

    74         self.menu = menu

    75         self.fill_menu()

    76 

    77     def up_event(self, event):

    78         index = self.listbox.index("active")

    79         if self.listbox.selection_includes(index):

    80             index = index - 1

    81         else:

    82             index = self.listbox.size() - 1

    83         if index < 0:

    84             self.listbox.bell()

    85         else:

    86             self.select(index)

    87             self.on_select(index)

    88         return "break"

    89 

    90     def down_event(self, event):

    91         index = self.listbox.index("active")

    92         if self.listbox.selection_includes(index):

    93             index = index + 1

    94         else:

    95             index = 0

    96         if index >= self.listbox.size():

    97             self.listbox.bell()

    98         else:

    99             self.select(index)

   100             self.on_select(index)

   101         return "break"

   102 

   103     def select(self, index):

   104         self.listbox.focus_set()

   105         self.listbox.activate(index)

   106         self.listbox.selection_clear(0, "end")

   107         self.listbox.selection_set(index)

   108         self.listbox.see(index)

   109 

   110     # Methods to override for specific actions

   111 

   112     def fill_menu(self):

   113         pass

   114 

   115     def on_select(self, index):

   116         pass

   117 

   118     def on_double(self, index):

   119         pass

   120 

   121 

   122 def test():

   123     root = Tk()

   124     root.protocol("WM_DELETE_WINDOW", root.destroy)

   125     class MyScrolledList(ScrolledList):

   126         def fill_menu(self): self.menu.add_command(label="pass")

   127         def on_select(self, index): print "select", self.get(index)

   128         def on_double(self, index): print "double", self.get(index)

   129     s = MyScrolledList(root)

   130     for i in range(30):

   131         s.append("item %02d" % i)

   132     return root

   133 

   134 def main():

   135     root = test()

   136     root.mainloop()

   137 

   138 if __name__ == '__main__':

   139     main()