在MS-Windows下调整大小导致的Tkinter性能问题

Tkinter performance issues by resizing under MS-Windows(在MS-Windows下调整大小导致的Tkinter性能问题)

问题描述

受this问题的启发，我想为我的根窗口编写自己的大小调整函数。 但我只是注意到我的代码显示了一些性能问题。如果您快速调整它的大小，您可以看到窗口没有像我希望的那样发现它的高度提示，它结结巴巴。(更像是摇摆)

有人知道为什么会发生这种情况吗？我最好的猜测是tkinter事件处理程序对它来说太慢了，或者我做的数学运算不是最快的方法。

我确实在不同的位置尝试了update_idletasks()，也尝试了几次。我尝试过的另一种方法是使用after方法，但它使情况变得更糟。

以下是示例代码：

import tkinter as tk


class FloatingWindow(tk.Tk):
    def __init__(self):
        super().__init__()
        self.overrideredirect(True)
        self.center()

        self.label = tk.Label(self, text="Grab the upper-right corner to resize")
        self.label.pack(side="top", fill="both", expand=True)

        self.grip2 = tk.Label(self,bg='blue')
        self.grip2.place(relx=1.0, rely=0, anchor="ne")
        self.grip2.bind("<B1-Motion>",self.OnMotion)

    def OnMotion(self, event):
        abs_x = self.winfo_pointerx() - self.winfo_rootx()
        abs_y = self.winfo_pointery() - self.winfo_rooty()
        if abs_x >0:
            x = self.winfo_rootx()
            y = self.winfo_rooty()+abs_y
            height = self.winfo_height()-abs_y
            if height >0:
                self.geometry("%dx%d+%d+%d" % (abs_x,height,
                                               x,y))
            
        
    def center(self):
        width = 300
        height = 300
        screen_width = self.winfo_screenwidth()
        screen_height = self.winfo_screenheight()
        x_coordinate = (screen_width/2) - (width/2)
        y_coordinate = (screen_height/2) - (height/2)

        self.geometry("%dx%d+%d+%d" % (width, height,
                                       x_coordinate, y_coordinate))

app=FloatingWindow()
app.mainloop()

full example

更新

看起来性能问题与Microsoft有关，而让大多数MS开发人员抓狂的well known issue。

抖动/闪烁/跳转

黑边

双画面/快速闪光/跳转

我的计算机是a：

Windows 10家庭版；基于x64的英特尔(R)酷睿(TM)i3-2120@3.30 GHz，3300 MHz，双核

与

Python3.7.2和tkinter 8.6

推荐答案

我快速添加了一些Widget和一些事件，以便每个人都能注意到如果注释行(在onMotion方法的开头)被停用self.update()的性能问题。我已经操作了代码，没有收到任何错误。希望这能解决您的问题。

import tkinter as tk

class FloatingWindow(tk.Tk):
    def __init__(self):
        super().__init__()
        self.overrideredirect(True)
        self.geometry("800x400+300+100")
        self.minsize(200, 200)
        self.config(bg="green")
        self.grid_columnconfigure(0, weight=3)
        self.grid_rowconfigure(1, weight=3)

        self.menu()
        self.textbox()        

        self.grip_se = tk.Label(self,bg='blue')
        self.grip_se.place(relx=1.0, rely=1.0, anchor="se")
        self.grip_se.bind("<B1-Motion>",lambda e, mode='se':self.OnMotion(e,mode))

        self.grip_e = tk.Label(self,bg='green')
        self.grip_e.place(relx=1.0, rely=0.5, anchor="e")
        self.grip_e.bind("<B1-Motion>",lambda e, mode='e':self.OnMotion(e,mode))
        
        self.grip_ne = tk.Label(self,bg='blue')
        self.grip_ne.place(relx=1.0, rely=0, anchor="ne")
        self.grip_ne.bind("<B1-Motion>",lambda e, mode='ne':self.OnMotion(e,mode))

        self.grip_n = tk.Label(self,bg='green')
        self.grip_n.place(relx=0.5, rely=0, anchor="n")
        self.grip_n.bind("<B1-Motion>",lambda e, mode='n':self.OnMotion(e,mode))

        self.grip_nw = tk.Label(self,bg='blue')
        self.grip_nw.place(relx=0, rely=0, anchor="nw")
        self.grip_nw.bind("<B1-Motion>",lambda e, mode='nw':self.OnMotion(e,mode))

        self.grip_w = tk.Label(self,bg='green')
        self.grip_w.place(relx=0, rely=0.5, anchor="w")
        self.grip_w.bind("<B1-Motion>",lambda e, mode='w':self.OnMotion(e,mode))

        self.grip_sw = tk.Label(self,bg='blue')
        self.grip_sw.place(relx=0, rely=1, anchor="sw")
        self.grip_sw.bind("<B1-Motion>",lambda e, mode='sw':self.OnMotion(e,mode))

        self.grip_s = tk.Label(self,bg='green')
        self.grip_s.place(relx=0.5, rely=1, anchor="s")
        self.grip_s.bind("<B1-Motion>",lambda e, mode='s':self.OnMotion(e,mode))

    def menu(self):
        self.frame = tk.Frame(self, height=25, bg='black')
        self.frame.grid(row=0, column=0, sticky="new")
        color = ['#FEF3B3','#FFF9DC', "#341C09"]

        for i in range(3):
            self.button = tk.Button(self.frame, text="Can you see", font=('calibri',12), bg=color[i-1], fg="red", relief="flat", bd=0)
            self.button.pack(side="left", fill="both", padx=3)
            self.lbl_space  = tk.Label(self.frame ,text="",bd=0,bg="black")
            self.lbl_space.pack(side="left", padx=5)

            self.button = tk.Button(self.frame, text="Can you see", font=('calibri',12), bg=color[i-1], fg="red", relief="flat", bd=0)
            self.button.pack(side="right", fill="both", padx=3)

            
    def textbox(self):
        self.frame2 = tk.Frame(self, bg='white')
        self.frame2.grid(row=1, column=0, sticky="wens")
        self.text_editor = tk.Text(self.frame2, wrap='word', font='calibri 12',undo = True, relief=tk.FLAT,bg="white")
        self.yscrollbar = tk.Scrollbar(self.frame2, command=self.text_editor.yview)
        self.yscrollbar.grid(row=0, column=1, sticky="ns")#ns

        self.text_editor.config(yscrollcommand=self.yscrollbar.set)
        self.text_editor.grid(row=0, column=0, sticky="wens", padx=3)

        self.frame2.grid_columnconfigure(0, weight=3)
        self.frame2.grid_rowconfigure(0, weight=3)
        self.text_editor.insert("1.0", 'Bed sincerity yet therefore forfeited his certainty neglected questions. Pursuit chamber as elderly amongst on. Distant however warrant farther to of. My justice wishing prudent waiting in be. Comparison age not pianoforte increasing delightful now. Insipidity sufficient dispatched any reasonably led ask. Announcing if attachment resolution sentiments admiration me on diminution. ')

        # insert a widget inside the text box
        options = ["choice 1","choice 2"]
        clicked = tk.StringVar()
        clicked.set(options[0])
        self.drop = tk.OptionMenu(self.text_editor, clicked, *options)
        self.text_editor.window_create("1.0", window=self.drop)
        self.drop.config(bg="#474747", relief='flat', font=('calibri',11, 'bold'))

    def OnMotion(self, event, mode):
        self.update() # <==== if you deactivate this line you can see the performance issues
        
        abs_x = self.winfo_pointerx() - self.winfo_rootx()
        abs_y = self.winfo_pointery() - self.winfo_rooty()
        width = self.winfo_width()
        height= self.winfo_height()
        x = self.winfo_rootx()
        y = self.winfo_rooty()
        
        if mode == 'se' and abs_x >0 and abs_y >0:
                self.geometry("%sx%s" % (abs_x,abs_y)
                              )
                
        if mode == 'e':
            self.geometry("%sx%s" % (abs_x,height)
                          )
        if mode == 'ne' and abs_x >0:
                y = y+abs_y
                height = height-abs_y
                if height >0:
                    self.geometry("%dx%d+%d+%d" % (abs_x,height,
                                                   x,y))
        if mode == 'n':
            height=height-abs_y
            y = y+abs_y
            if height >0 and width >0:
                self.geometry("%dx%d+%d+%d" % (width,height,
                                               x,y))
            
        if mode == 'nw':
            width = width-abs_x
            height=height-abs_y
            x = x+abs_x
            y = y+abs_y
            if height >0 and width >0:
                self.geometry("%dx%d+%d+%d" % (width,height,
                                               x,y))
        if mode == 'w':
            width = width-abs_x
            x = x+abs_x
            if height >0 and width >0:
                self.geometry("%dx%d+%d+%d" % (width,height,
                                               x,y))
        if mode == 'sw':
            width = width-abs_x
            height=height-(height-abs_y)
            x = x+abs_x
            if height >0 and width >0:
                self.geometry("%dx%d+%d+%d" % (width,height,
                                               x,y))
        if mode == 's':
            height=height-(height-abs_y)
            if height >0 and width >0:
                self.geometry("%dx%d+%d+%d" % (width,height,
                                               x,y))
            


app=FloatingWindow()
app.mainloop()

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