我正在尝试实现此行为：当用户点击按钮的时间较短时，程序会运行第一个方法，即可以添加一个方法。但是，当用户按住按钮较长时间时，程序将运行第二种方法，从而打开一个对话窗口。我想到的唯一解决方案是使用时间线程。
问题在于程序的表现非常奇怪。有时候（并不总是那么奇怪）当对话框弹出我的计算机时会出现一些冻结（不完全是，进程正在运行）。我可以用鼠标移动但我无法用键盘点击或写任何东西。
这是一段代码：
from Tkinter import *
import threading
import os
class Dialog(Toplevel):
def __init__(self, parent, title = None):
Toplevel.__init__(self, parent)
self.transient(parent)
if title:
self.title(title)
self.parent = parent
self.result = None
body = Frame(self)
self.initial_focus = self.body(body)
body.pack(padx=5, pady=5)
#self.buttonbox()
self.grab_set()
if not self.initial_focus:
self.initial_focus = self
self.protocol("WM_DELETE_WINDOW", self.cancel)
self.geometry("+%d+%d" % (parent.winfo_rootx()+50,
parent.winfo_rooty()+50))
self.initial_focus.focus_set()
self.wait_window(self)
#
# construction hooks
def body(self, master):
# create dialog body. return widget that should have
# initial focus. this method should be overridden
pass
def buttonbox(self):
# add standard button box. override if you don't want the
# standard buttons
box = Frame(self)
w = Button(box, text="OK", width=10, command=self.ok, default=ACTIVE)
w.pack(side=LEFT, padx=5, pady=5)
w = Button(box, text="Cancel", width=10, command=self.cancel)
w.pack(side=LEFT, padx=5, pady=5)
self.bind("<Return>", self.ok)
self.bind("<Escape>", self.cancel)
box.pack()
#
# standard button semantics
def ok(self, event=None):
if not self.validate():
self.initial_focus.focus_set() # put focus back
return
self.withdraw()
self.update_idletasks()
self.apply()
self.cancel()
def cancel(self, event=None):
# put focus back to the parent window
self.parent.focus_set()
self.destroy()
#
# command hooks
def validate(self):
return 1 # override
def apply(self):
pass # override
class MyDialog(Dialog):
def body(self, master):
master.grid_columnconfigure(0, weight=1)
self.e1 = Entry(master)
self.e1.grid(column=0,row=0,columnspan = 4)
self.buttons = {}
self.buttons['previous'] = Button(master,text =u'/')
self.buttons['previous'].grid(column=0,row =1,columnspan = 2)
self.buttons['next'] = Button(master,text =u'*')
self.buttons['next'].grid(column=2,row =1,columnspan = 2)
self.buttons['minus'] = Button(master,text =u'-')
self.buttons['minus'].grid(column=3,row =2)
self.buttons['plus'] = Button(master,text =u'+')
self.buttons['plus'].grid(column=3,row =3)
self.buttons['enter'] = Button(master,text =u'Enter')
self.buttons['enter'].grid(column=3,row =4,rowspan = 2)
self.buttons['zero'] = Button(master,text =u'0')
self.buttons['zero'].grid(column=0,row =5)
self.buttons['del'] = Button(master,text =u'←')
self.buttons['del'].grid(column=1,row =5)
rows = range(4,1,-1)
columns = range(0,3)
i = 1
for row in rows:
for column in columns:
Button(master,text = i).grid(row= row,column = column)
i+=1
return self.e1 # initial focus
def leftClick():
print 'add one'
def longerClick(): #if the timer ends this will run
d = MyDialog(master) #create dialog
print 'longerClick'
def handleButtonPress(event):
global t
t = threading.Timer(0.8,longerClick) #setTimer
t.start()
print t
def handleButtonRelease(event): #here is a problem probably
global t
t.cancel()
leftClick()
master = Tk()
t = None
master.geometry('{}x{}'.format(300, 300))
button = Button(master, text = 'Stlac')
button.pack()
button.bind('<ButtonPress-1>',handleButtonPress)
button.bind('<ButtonRelease-1>',handleButtonRelease)
mainloop()
所以当按下按钮时我设置了计时器。当用户在计时器结束前释放按钮时，计时器将被取消。否则，将运行longerClick方法。 如果你知道问题出在哪里，我真的会帮助你。此外，如果你知道一个更好的方法如何检测更长的按钮按下，这也将有助于我。我已经读过PYQT有可能虽然我必须使用Tkinter。