This is a simple modal listbox class. It is intended to be invoked about like this: results = ListBoxChoice(root, list=listOfItems).returnValue().
It will return the list item selected. It will take any item in the list that can return a textual indicator.
| Python |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 | from Tkinter import *
class ListBoxChoice(object):
def __init__(self, master=None, title=None, message=None, list=[]):
self.master = master
self.value = None
self.list = list[:]
self.modalPane = Toplevel(self.master)
self.modalPane.transient(self.master)
self.modalPane.grab_set()
self.modalPane.bind("<Return>", self._choose)
self.modalPane.bind("<Escape>", self._cancel)
if title:
self.modalPane.title(title)
if message:
Label(self.modalPane, text=message).pack(padx=5, pady=5)
listFrame = Frame(self.modalPane)
listFrame.pack(side=TOP, padx=5, pady=5)
scrollBar = Scrollbar(listFrame)
scrollBar.pack(side=RIGHT, fill=Y)
self.listBox = Listbox(listFrame, selectmode=SINGLE)
self.listBox.pack(side=LEFT, fill=Y)
scrollBar.config(command=self.listBox.yview)
self.listBox.config(yscrollcommand=scrollBar.set)
self.list.sort()
for item in self.list:
self.listBox.insert(END, item)
buttonFrame = Frame(self.modalPane)
buttonFrame.pack(side=BOTTOM)
chooseButton = Button(buttonFrame, text="Choose", command=self._choose)
chooseButton.pack()
cancelButton = Button(buttonFrame, text="Cancel", command=self._cancel)
cancelButton.pack(side=RIGHT)
def _choose(self, event=None):
try:
firstIndex = self.listBox.curselection()[0]
self.value = self.list[int(firstIndex)]
except IndexError:
self.value = None
self.modalPane.destroy()
def _cancel(self, event=None):
self.modalPane.destroy()
def returnValue(self):
self.master.wait_window(self.modalPane)
return self.value
if __name__ == '__main__':
import random
root = Tk()
returnValue = True
list = [random.randint(1,100) for x in range(50)]
while returnValue:
returnValue = ListBoxChoice(root, "Number Picking", "Pick one of these crazy random numbers", list).returnValue()
print returnValue
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Discussion
Often times in your GUI work you will want to have a simple list box that takes a list of items or objects and returns one of those items. This is a relativley simple solution that could easily be expanded to handle multiple selections.
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