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from tkinter import *
from tkinter.ttk import Scrollbar
from idlelib import macosx
class ScrolledList:
default = "(None)"
def __init__(self, master, **options):
# Create top frame, with scrollbar and listbox
self.master = master
self.frame = frame = Frame(master)
self.frame.pack(fill="both", expand=1)
self.vbar = vbar = Scrollbar(frame, name="vbar")
self.vbar.pack(side="right", fill="y")
self.listbox = listbox = Listbox(frame, exportselection=0,
background="white")
if options:
listbox.configure(options)
listbox.pack(expand=1, fill="both")
# Tie listbox and scrollbar together
vbar["command"] = listbox.yview
listbox["yscrollcommand"] = vbar.set
# Bind events to the list box
listbox.bind("<ButtonRelease-1>", self.click_event)
listbox.bind("<Double-ButtonRelease-1>", self.double_click_event)
if macosx.isAquaTk():
listbox.bind("<ButtonPress-2>", self.popup_event)
listbox.bind("<Control-Button-1>", self.popup_event)
else:
listbox.bind("<ButtonPress-3>", self.popup_event)
listbox.bind("<Key-Up>", self.up_event)
listbox.bind("<Key-Down>", self.down_event)
# Mark as empty
self.clear()
def close(self):
self.frame.destroy()
def clear(self):
self.listbox.delete(0, "end")
self.empty = 1
self.listbox.insert("end", self.default)
def append(self, item):
if self.empty:
self.listbox.delete(0, "end")
self.empty = 0
self.listbox.insert("end", str(item))
def get(self, index):
return self.listbox.get(index)
def click_event(self, event):
self.listbox.activate("@%d,%d" % (event.x, event.y))
index = self.listbox.index("active")
self.select(index)
self.on_select(index)
return "break"
def double_click_event(self, event):
index = self.listbox.index("active")
self.select(index)
self.on_double(index)
return "break"
menu = None
def popup_event(self, event):
if not self.menu:
self.make_menu()
menu = self.menu
self.listbox.activate("@%d,%d" % (event.x, event.y))
index = self.listbox.index("active")
self.select(index)
menu.tk_popup(event.x_root, event.y_root)
return "break"
def make_menu(self):
menu = Menu(self.listbox, tearoff=0)
self.menu = menu
self.fill_menu()
def up_event(self, event):
index = self.listbox.index("active")
if self.listbox.selection_includes(index):
index = index - 1
else:
index = self.listbox.size() - 1
if index < 0:
self.listbox.bell()
else:
self.select(index)
self.on_select(index)
return "break"
def down_event(self, event):
index = self.listbox.index("active")
if self.listbox.selection_includes(index):
index = index + 1
else:
index = 0
if index >= self.listbox.size():
self.listbox.bell()
else:
self.select(index)
self.on_select(index)
return "break"
def select(self, index):
self.listbox.focus_set()
self.listbox.activate(index)
self.listbox.selection_clear(0, "end")
self.listbox.selection_set(index)
self.listbox.see(index)
# Methods to override for specific actions
def fill_menu(self):
pass
def on_select(self, index):
pass
def on_double(self, index):
pass
def _scrolled_list(parent): # htest #
top = Toplevel(parent)
x, y = map(int, parent.geometry().split('+')[1:])
top.geometry("+%d+%d" % (x+200, y + 175))
class MyScrolledList(ScrolledList):
def fill_menu(self): self.menu.add_command(label="right click")
def on_select(self, index): print("select", self.get(index))
def on_double(self, index): print("double", self.get(index))
scrolled_list = MyScrolledList(top)
for i in range(30):
scrolled_list.append("Item %02d" % i)
if __name__ == '__main__':
# At the moment, test_scrolledlist merely creates instance, like htest.
from idlelib.idle_test.htest import run
run(_scrolled_list)
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