Tkinter多线程问题

https://blog.csdn.net/u013700771/article/details/103321783

• demo1 ```python from tkinter import * from tkinter import ttk import time

class GUI():

def __init__(self, root):
    self.initGUI(root)
def initGUI(self, root):
    root.title("test")
    root.geometry("400x200+700+500")
    root.resizable = False
    self.button_1 = Button(root, text="run A", width=10, command=self.A)
    self.button_1.pack(side="top")
    self.button_2 = Button(root, text="run B", width=10, command=self.B)
    self.button_2.pack(side="top")
    root.mainloop()
def A(self):
    print ("start to run proc A")
    time.sleep(3)
    print( "proc A finished")
def B(self):
    print ("start to run proc B")
    time.sleep(3)
    print ("proc B finished")

if name == “main“:

root = Tk()
myGUI = GUI(root)

- 多线程
```python
from tkinter import *
from tkinter import ttk
import threading
import time
class GUI():
    def __init__(self, root):
        self.initGUI(root)
    def initGUI(self, root):
        root.title("test")
        root.geometry("400x200+700+500")
        root.resizable = False
        self.button_1 = Button(root, text="run A", width=10, command=self.A)
        self.button_1.pack(side="top")
        self.button_2 = Button(root, text="run B", width=10, command=self.B)
        self.button_2.pack(side="top")
        root.mainloop()
    def __A(self):
        print ("start to run proc A")
        time.sleep(3)
        print ("proc A finished")
    def A(self):
        T = threading.Thread(target=self.__A)
        T.start()
    def __B(self):
        print( "start to run proc B")
        time.sleep(3)
        print ("proc B finished")
    def B(self):
        T = threading.Thread(target=self.__B)
        T.start()
if __name__ == "__main__":
    root = Tk()
    myGUI = GUI(root)

• demo2 ```python from tkinter import * from tkinter import ttk import threading import time import sys

def fmtTime(timeStamp): timeArray = time.localtime(timeStamp) dateTime = time.strftime(“%Y-%m-%d %H:%M:%S”, timeArray) return dateTime

class re_Text():

def __init__(self, widget):
    self.widget = widget
def write(self, content):
    self.widget.insert(INSERT, content)
    self.widget.see(END)

class GUI():

def __init__(self, root):
    self.initGUI(root)
def initGUI(self, root):
    root.title("test")
    root.geometry("400x200+700+500")
    root.resizable = False
    self.button = Button(root, text="click", width=10, command=self.show)
    self.button.pack(side="top")
    self.scrollBar = Scrollbar(root)
    self.scrollBar.pack(side="right", fill="y")
    self.text = Text(root, height=10, width=45, yscrollcommand=self.scrollBar.set)
    self.text.pack(side="top", fill=BOTH, padx=10, pady=10)
    self.scrollBar.config(command=self.text.yview)
    sys.stdout = re_Text(self.text)
    root.mainloop()
def show(self):
    i = 0
    while i < 3:
        print (fmtTime(time.time()))
        time.sleep(1)
        i += 1

if name == “main“:

root = Tk()
myGUI = GUI(root)

- 子线程更新GUI
```python
from tkinter import *
from tkinter import ttk
import threading
import time
import sys
def fmtTime(timeStamp):
    timeArray = time.localtime(timeStamp)
    dateTime = time.strftime("%Y-%m-%d %H:%M:%S", timeArray)
    return dateTime
class re_Text():
    def __init__(self, widget):
        self.widget = widget
    def write(self, content):
        self.widget.insert(INSERT, content)
        self.widget.see(END)
class GUI():
    def __init__(self, root):
        self.initGUI(root)
    def initGUI(self, root):
        root.title("test")
        root.geometry("400x200+700+500")
        root.resizable = False
        self.button = Button(root, text="click", width=10, command=self.show)
        self.button.pack(side="top")
        self.scrollBar = Scrollbar(root)
        self.scrollBar.pack(side="right", fill="y")
        self.text = Text(root, height=10, width=45, yscrollcommand=self.scrollBar.set)
        self.text.pack(side="top", fill=BOTH, padx=10, pady=10)
        self.scrollBar.config(command=self.text.yview)
        sys.stdout = re_Text(self.text)
        root.mainloop()
    def __show(self):
        i = 0
        while i < 3:
            print (fmtTime(time.time()))
            time.sleep(1)
            i += 1
    def show(self):
        T = threading.Thread(target=self.__show, args=())
        T.start()
if __name__ == "__main__":
    root = Tk()
    myGUI = GUI(root)

• 队列 ```python from tkinter import * from tkinter import ttk import queue import time

q = queue.Queue() for i in range(0, 4): time.sleep(0.5) element = “element %s”%i print (“put %s”%element) q.put(element)

while not q.empty(): time.sleep(0.5) print (“get %s”% q.get())

```python
from tkinter import *
from tkinter import ttk
class GUI():
    def __init__(self, root):
        self.initGUI(root)
    def loop(self):
        print ("loop proc running")
        self.root.after(1000, self.loop)
    def initGUI(self, root):
        self.root = root
        self.root.title("test")
        self.root.geometry("400x200+80+600")
        self.root.resizable = False
        self.root.after(1000, self.loop)
        self.root.mainloop()
if __name__ == "__main__":
    root = Tk()
    myGUI = GUI(root)

from tkinter import *
from tkinter import ttk
# coding=utf-8
import threading
import time
import sys
import queue
def fmtTime(timeStamp):
    timeArray = time.localtime(timeStamp)
    dateTime = time.strftime("%Y-%m-%d %H:%M:%S", timeArray)
    return dateTime
#自定义re_Text,用于将stdout映射到Queue
class re_Text():
    def __init__(self, queue):
        self.queue = queue
    def write(self, content):
        self.queue.put(content)
class GUI():
    def __init__(self, root):
        #new 一个Quue用于保存输出内容
        self.msg_queue = queue.Queue()
        self.initGUI(root)
    #在show_msg方法里，从Queue取出元素，输出到Text
    def show_msg(self):
        while not self.msg_queue.empty():
            content = self.msg_queue.get()
            self.text.insert(INSERT, content)
            self.text.see(END)
        #after方法再次调用show_msg
        self.root.after(100, self.show_msg)
    def initGUI(self, root):
        self.root = root
        self.root.title("test")
        self.root.geometry("400x200+700+500")
        self.root.resizable = False
        self.button = Button(self.root, text="click", width=10, command=self.show)
        self.button.pack(side="top")
        self.scrollBar = Scrollbar(self.root)
        self.scrollBar.pack(side="right", fill="y")
        self.text = Text(self.root, height=10, width=45, yscrollcommand=self.scrollBar.set)
        self.text.pack(side="top", fill=BOTH, padx=10, pady=10)
        self.scrollBar.config(command=self.text.yview)
        #启动after方法
        self.root.after(100, self.show_msg)
        #将stdout映射到re_Text
        sys.stdout = re_Text(self.msg_queue)
        root.mainloop()
    def __show(self):
        i = 0
        while i < 3:
            print (fmtTime(time.time()))
            time.sleep(1)
            i += 1
    def show(self):
        T = threading.Thread(target=self.__show, args=())
        T.start()
if __name__ == "__main__":
    root = Tk()
    myGUI = GUI(root)