Commit | Line | Data |
---|---|---|
86530b38 AT |
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() |