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Text File  |  2005-10-18  |  4KB  |  140 lines
  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()
  140.