Tkinter window preload

introduction

A description of the premises , This is not a technical article , Just an experience sharing .

Source of problem

as everyone knows ,tkinter As Python The standard library of GUI library , One problem is that loading is slow , Relevant experiments have also basically proved this . however , In your project , What causes the window to start slowly is really tkinter The window itself ？ It doesn't have to be .

In a general way tkinter Use

First , Let's recall many things first tkinter How the project is written tkinter The window appears at the right time .

1. The import Of import

2. Load classes and functions

3. Determination and tkinter Window related variables

4. load tkinter window

Obviously , stay tkinter Before the window appears ,Python There is still some work to be done . among , The first and third steps will take a long time . as a result of , Some libraries are really complicated , Such as PIL、Panda etc. , These have special pyd And the dynamic link library should be imported , And it has many source files ; On the other hand ,tkinter Windows need to create many controls , Especially for more complex projects , It takes a while to create the control .

In terms of creating controls ,customtkinter Well done , Adopt post load rendering ;TinUI The rendering loading speed of is very fast .

In one of my amateur projects , That is to say TinReader-TinGroup, There is a lot to load , Basic needs 3~6 second .

A role model

Look at Firefox next door , No, no matter three, seven, twenty-one , First show you a window frame （ background ） Do you ？ The preload of other browsers is very large .

Since there are so many things to do , What else can I do , This is what I should do ？

It's very simple , Is to put tkinter Import first , The next line immediately shows tkinter window .

wait, I'm not kidding .

Specific measures

Show the window directly

There are few changes to be made . The details are as follows ：

# Import tkinter
from tkinter import *
# Necessary variables 
#title=...
#width=...
#height=...
# Use high DPI...
# create a window 
root=Tk()
root.geometry('500x500')
root.update()
# Follow up operation 

The notes have been written clearly .

My own project

stay TinReader Source code , All in all 1195 That's ok , You need to load pythonnet, PIL, tkwebview2, Dependencies ; Get initialization settings, etc . It will probably take 3~6 The second time .

Now? , Directly at the beginning ：

# -*- coding: utf-8 -*-
from tkinter import Tk,Label,Frame,StringVar,scrolledtext,IntVar,Message,Radiobutton,Menu,Checkbutton,Canvas,\
    Button as tkButton,LabelFrame,Toplevel,PhotoImage,Entry as tkEntry
import ctypes
# Pilot interface ---
ctypes.windll.shcore.SetProcessDpiAwareness(1)
TinTop=Tk()# main window 
TinTop.withdraw()

sw = TinTop.winfo_screenwidth()
# Get the screen width 
sh = TinTop.winfo_screenheight()
# Get the screen height 

root=Toplevel()
root.geometry(str(sw//2-50)+'x'+str(sh-130)+'+0+10')
root.update()
#---

effect

If there is no conversion in this order , Then run from 、tkinter Blank window 、tkinter After the window is loaded , It was all empty , Using it may even feel like a crash .

The source code is really 1000+ Lines of code , The intermediate steps are indeed time-consuming , Now? , See at least one tkinter Blank windows are better than nothing .

---

Conclusion

This article is only for experience sharing .

Suggested items ： Initialization takes tkinter project .

tkinter innovation