| 1 | from Tkinter import *
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| 2 |
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| 3 | class ScrolledList:
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| 4 |
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| 5 | default = "(None)"
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| 6 |
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| 7 | def __init__(self, master, **options):
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| 8 | # Create top frame, with scrollbar and listbox
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| 9 | self.master = master
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| 10 | self.frame = frame = Frame(master)
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| 11 | self.frame.pack(fill="both", expand=1)
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| 12 | self.vbar = vbar = Scrollbar(frame, name="vbar")
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| 13 | self.vbar.pack(side="right", fill="y")
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| 14 | self.listbox = listbox = Listbox(frame, exportselection=0,
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| 15 | background="white")
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| 16 | if options:
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| 17 | listbox.configure(options)
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| 18 | listbox.pack(expand=1, fill="both")
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| 19 | # Tie listbox and scrollbar together
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| 20 | vbar["command"] = listbox.yview
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| 21 | listbox["yscrollcommand"] = vbar.set
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| 22 | # Bind events to the list box
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| 23 | listbox.bind("<ButtonRelease-1>", self.click_event)
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| 24 | listbox.bind("<Double-ButtonRelease-1>", self.double_click_event)
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| 25 | listbox.bind("<ButtonPress-3>", self.popup_event)
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| 26 | listbox.bind("<Key-Up>", self.up_event)
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| 27 | listbox.bind("<Key-Down>", self.down_event)
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| 28 | # Mark as empty
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| 29 | self.clear()
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| 30 |
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| 31 | def close(self):
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| 32 | self.frame.destroy()
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| 33 |
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| 34 | def clear(self):
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| 35 | self.listbox.delete(0, "end")
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| 36 | self.empty = 1
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| 37 | self.listbox.insert("end", self.default)
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| 38 |
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| 39 | def append(self, item):
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| 40 | if self.empty:
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| 41 | self.listbox.delete(0, "end")
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| 42 | self.empty = 0
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| 43 | self.listbox.insert("end", str(item))
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| 44 |
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| 45 | def get(self, index):
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| 46 | return self.listbox.get(index)
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| 47 |
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| 48 | def click_event(self, event):
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| 49 | self.listbox.activate("@%d,%d" % (event.x, event.y))
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| 50 | index = self.listbox.index("active")
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| 51 | self.select(index)
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| 52 | self.on_select(index)
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| 53 | return "break"
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| 54 |
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| 55 | def double_click_event(self, event):
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| 56 | index = self.listbox.index("active")
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| 57 | self.select(index)
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| 58 | self.on_double(index)
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| 59 | return "break"
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| 60 |
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| 61 | menu = None
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| 62 |
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| 63 | def popup_event(self, event):
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| 64 | if not self.menu:
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| 65 | self.make_menu()
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| 66 | menu = self.menu
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| 67 | self.listbox.activate("@%d,%d" % (event.x, event.y))
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| 68 | index = self.listbox.index("active")
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| 69 | self.select(index)
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| 70 | menu.tk_popup(event.x_root, event.y_root)
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| 71 |
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| 72 | def make_menu(self):
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| 73 | menu = Menu(self.listbox, tearoff=0)
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| 74 | self.menu = menu
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| 75 | self.fill_menu()
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| 76 |
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| 77 | def up_event(self, event):
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| 78 | index = self.listbox.index("active")
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| 79 | if self.listbox.selection_includes(index):
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| 80 | index = index - 1
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| 81 | else:
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| 82 | index = self.listbox.size() - 1
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| 83 | if index < 0:
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| 84 | self.listbox.bell()
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| 85 | else:
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| 86 | self.select(index)
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| 87 | self.on_select(index)
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| 88 | return "break"
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| 89 |
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| 90 | def down_event(self, event):
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| 91 | index = self.listbox.index("active")
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| 92 | if self.listbox.selection_includes(index):
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| 93 | index = index + 1
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| 94 | else:
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| 95 | index = 0
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| 96 | if index >= self.listbox.size():
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| 97 | self.listbox.bell()
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| 98 | else:
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| 99 | self.select(index)
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| 100 | self.on_select(index)
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| 101 | return "break"
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| 102 |
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| 103 | def select(self, index):
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| 104 | self.listbox.focus_set()
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| 105 | self.listbox.activate(index)
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| 106 | self.listbox.selection_clear(0, "end")
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| 107 | self.listbox.selection_set(index)
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| 108 | self.listbox.see(index)
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| 109 |
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| 110 | # Methods to override for specific actions
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| 111 |
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| 112 | def fill_menu(self):
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| 113 | pass
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| 114 |
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| 115 | def on_select(self, index):
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| 116 | pass
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| 117 |
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| 118 | def on_double(self, index):
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| 119 | pass
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| 120 |
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| 121 |
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| 122 | def test():
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| 123 | root = Tk()
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| 124 | root.protocol("WM_DELETE_WINDOW", root.destroy)
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| 125 | class MyScrolledList(ScrolledList):
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| 126 | def fill_menu(self): self.menu.add_command(label="pass")
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| 127 | def on_select(self, index): print "select", self.get(index)
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| 128 | def on_double(self, index): print "double", self.get(index)
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| 129 | s = MyScrolledList(root)
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| 130 | for i in range(30):
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| 131 | s.append("item %02d" % i)
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| 132 | return root
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| 133 |
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| 134 | def main():
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| 135 | root = test()
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| 136 | root.mainloop()
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| 137 |
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| 138 | if __name__ == '__main__':
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| 139 | main()
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