mirror of
https://github.com/python/cpython.git
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140 lines
3.9 KiB
Python
140 lines
3.9 KiB
Python
from Tkinter import *
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class ScrolledList:
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default = "(None)"
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def __init__(self, master, **options):
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# Create top frame, with scrollbar and listbox
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self.master = master
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self.frame = frame = Frame(master)
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self.frame.pack(fill="both", expand=1)
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self.vbar = vbar = Scrollbar(frame, name="vbar")
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self.vbar.pack(side="right", fill="y")
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self.listbox = listbox = Listbox(frame, exportselection=0,
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background="white")
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if options:
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listbox.configure(options)
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listbox.pack(expand=1, fill="both")
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# Tie listbox and scrollbar together
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vbar["command"] = listbox.yview
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listbox["yscrollcommand"] = vbar.set
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# Bind events to the list box
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listbox.bind("<ButtonRelease-1>", self.click_event)
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listbox.bind("<Double-ButtonRelease-1>", self.double_click_event)
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listbox.bind("<ButtonPress-3>", self.popup_event)
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listbox.bind("<Key-Up>", self.up_event)
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listbox.bind("<Key-Down>", self.down_event)
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# Mark as empty
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self.clear()
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def close(self):
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self.frame.destroy()
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def clear(self):
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self.listbox.delete(0, "end")
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self.empty = 1
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self.listbox.insert("end", self.default)
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def append(self, item):
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if self.empty:
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self.listbox.delete(0, "end")
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self.empty = 0
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self.listbox.insert("end", str(item))
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def get(self, index):
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return self.listbox.get(index)
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def click_event(self, event):
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self.listbox.activate("@%d,%d" % (event.x, event.y))
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index = self.listbox.index("active")
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self.select(index)
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self.on_select(index)
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return "break"
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def double_click_event(self, event):
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index = self.listbox.index("active")
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self.select(index)
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self.on_double(index)
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return "break"
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menu = None
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def popup_event(self, event):
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if not self.menu:
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self.make_menu()
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menu = self.menu
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self.listbox.activate("@%d,%d" % (event.x, event.y))
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index = self.listbox.index("active")
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self.select(index)
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menu.tk_popup(event.x_root, event.y_root)
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def make_menu(self):
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menu = Menu(self.listbox, tearoff=0)
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self.menu = menu
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self.fill_menu()
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def up_event(self, event):
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index = self.listbox.index("active")
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if self.listbox.selection_includes(index):
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index = index - 1
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else:
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index = self.listbox.size() - 1
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if index < 0:
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self.listbox.bell()
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else:
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self.select(index)
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self.on_select(index)
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return "break"
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def down_event(self, event):
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index = self.listbox.index("active")
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if self.listbox.selection_includes(index):
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index = index + 1
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else:
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index = 0
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if index >= self.listbox.size():
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self.listbox.bell()
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else:
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self.select(index)
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self.on_select(index)
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return "break"
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def select(self, index):
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self.listbox.focus_set()
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self.listbox.activate(index)
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self.listbox.selection_clear(0, "end")
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self.listbox.selection_set(index)
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self.listbox.see(index)
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# Methods to override for specific actions
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def fill_menu(self):
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pass
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def on_select(self, index):
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pass
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def on_double(self, index):
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pass
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def test():
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root = Tk()
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root.protocol("WM_DELETE_WINDOW", root.destroy)
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class MyScrolledList(ScrolledList):
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def fill_menu(self): self.menu.add_command(label="pass")
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def on_select(self, index): print "select", self.get(index)
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def on_double(self, index): print "double", self.get(index)
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s = MyScrolledList(root)
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for i in range(30):
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s.append("item %02d" % i)
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return root
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def main():
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root = test()
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root.mainloop()
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if __name__ == '__main__':
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main()
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