Tools/idle/MultiScrolledLists.py

   1 # One or more ScrolledLists with HSeparators between them.
   2 # There is a hierarchical relationship between them:
   3 # the right list displays the substructure of the selected item
   4 # in the left list.
   5
   6 import string
   7 from Tkinter import *
   8 from WindowList import ListedToplevel
   9 from Separator import HSeparator
  10 from ScrolledList import ScrolledList
  11
  12 class MultiScrolledLists:
  13
  14     def __init__(self, root, nlists=2):
  15         assert nlists >= 1
  16         self.root = root
  17         self.nlists = nlists
  18         self.path = []
  19         # create top
  20         self.top = top = ListedToplevel(root)
  21         top.protocol("WM_DELETE_WINDOW", self.close)
  22         top.bind("<Escape>", self.close)
  23         self.settitle()
  24         # create frames and separators in between
  25         self.frames = []
  26         self.separators = []
  27         last = top
  28         for i in range(nlists-1):
  29             sepa = HSeparator(last)
  30             self.separators.append(sepa)
  31             frame, last = sepa.parts()
  32             self.frames.append(frame)
  33         self.frames.append(last)
  34         # create labels and lists
  35         self.labels = []
  36         self.lists = []
  37         for i in range(nlists):
  38             frame = self.frames[i]
  39             label = Label(frame, text=self.subtitle(i),
  40                 relief="groove", borderwidth=2)
  41             label.pack(fill="x")
  42             self.labels.append(label)
  43             list = ScrolledList(frame, width=self.width(i),
  44                 height=self.height(i))
  45             self.lists.append(list)
  46             list.on_select = \
  47                 lambda index, i=i, self=self: self.on_select(index, i)
  48             list.on_double = \
  49                 lambda index, i=i, self=self: self.on_double(index, i)
  50         # fill leftmost list (rest get filled on demand)
  51         self.fill(0)
  52         # XXX one after_idle isn't enough; two are...
  53         top.after_idle(self.call_pack_propagate_1)
  54
  55     def call_pack_propagate_1(self):
  56         self.top.after_idle(self.call_pack_propagate)
  57
  58     def call_pack_propagate(self):
  59         for frame in self.frames:
  60             frame.pack_propagate(0)
  61
  62     def close(self, event=None):
  63         self.top.destroy()
  64
  65     def settitle(self):
  66         short = self.shorttitle()
  67         long = self.longtitle()
  68         if short and long:
  69             title = short + " - " + long
  70         elif short:
  71             title = short
  72         elif long:
  73             title = long
  74         else:
  75             title = "Untitled"
  76         icon = short or long or title
  77         self.top.wm_title(title)
  78         self.top.wm_iconname(icon)
  79
  80     def longtitle(self):
  81         # override this
  82         return "Multi Scrolled Lists"
  83
  84     def shorttitle(self):
  85         # override this
  86         return None
  87
  88     def width(self, i):
  89         # override this
  90         return 20
  91
  92     def height(self, i):
  93         # override this
  94         return 10
  95
  96     def subtitle(self, i):
  97         # override this
  98         return "Column %d" % i
  99
 100     def fill(self, i):
 101         for k in range(i, self.nlists):
 102             self.lists[k].clear()
 103             self.labels[k].configure(text=self.subtitle(k))
 104         list = self.lists[i]
 105         l = self.items(i)
 106         for s in l:
 107             list.append(s)
 108
 109     def on_select(self, index, i):
 110         item = self.lists[i].get(index)
 111         del self.path[i:]
 112         self.path.append(item)
 113         if i+1 < self.nlists:
 114             self.fill(i+1)
 115
 116     def items(self, i):
 117         # override this
 118         l = []
 119         for k in range(10):
 120             s = str(k)
 121             if i > 0:
 122                 s = self.path[i-1] + "." + s
 123             l.append(s)
 124         return l
 125
 126     def on_double(self, index, i):
 127         pass
 128
 129
 130 def main():
 131     root = Tk()
 132     quit = Button(root, text="Exit", command=root.destroy)
 133     quit.pack()
 134     MultiScrolledLists(root, 4)
 135     root.mainloop()
 136
 137 if __name__ == "__main__":
 138     main()