Currently I'm working with FileChooser a lot and I didn't find any mention of refreshing the widget in the docs. The widget is awesome, but if someone wants to refresh shown files, a movement from current directory is necessary to refresh files.
The problem is when you have a single directory as a rootpath and inside are only files, therefore no such movement is possible.
My question was how to refresh the widget if I want to avoid any wasteful removing/adding of FileChooser and do it as short as possible for a FileChooser that is very nested in a kv file.
After I searched filechooser.py I found the code which is triggered on each movement between directories. Giving the fact the FileChooserIconView and FileChooserListView inherit from FileChooserController, the access to the function is simple and no additional imports are required.
Let's say we have filechooser = FileChooserIconView():
filechooser._update_files() works well and when is FileChooser nested somewhere, it's easy to access it with id
For more tweaks Clock.schedule_interval(filechooser._update_files, t) may be helpful where you can update your directory content within a reasonable time.
(I add it here, because I found no mention of it, however it may be useful to someone.)
Related
Beginner in the whole Python/Anki thing. Learning more about coding for fun and I have set up a debugging environment with pycharm and an Anki profile with the bazelfixes and it seems to start anki up fine. I want to append an extra dropdown menu on the main menu toolbar in Anki so that I can connect the actions to my functions.
I went through the hooks and the toolbar hook worked but it is not exactly what I was going for because it adds to the toolbar, not the menu. I want to add a new dropdown into the actual main menu next to tools, help, etc. connect them to functions I have made. Kind of like this
I have looked at others and sometimes they work partially but it's like a fragmented puzzle some use qmainwindow and it makes a popup separate from anki when I run it, or other approaches where they use the aqt.mw.form() functions in various ways but when I do it it will be like "nonetype doesn't take .form function." or form is not an expected argument. I want to figure out the first basic step.
I have also looked at the aqt MW thing but I am kind of confused about how it works so I am not sure if that is a better approach to read up on. The whole class>def variable> mw.append type of structure I have been seeing in other's code is a little confusing for me. Or am I going about it the completely wrong way and should use html/CSS? Any help or advice is greatly appreciated!
Also here is the bazelfixes code I have been using on pycharm.
try:
import bazelfixes
bazelfixes.fix_pywin32_in_bazel()
bazelfixes.fix_extraneous_path_in_bazel()
bazelfixes.fix_run_on_macos()
except ImportError:
pass
if not os.environ.get(“ANKI_IMPORT_ONLY”):
aqt.run()
TL;DR How do I, within this code on pycharm append an extra dropdown item on the main menu bar. Is there a hook I am missing (not the init toolbar one)? Or a different approach I should try?
The people who are familiar with the Live Server of VS Code, would have easily understood what is the main motive of this question.
But for others, here's the explanation:
Main motive of Live Server is to Automatically Reload Your Site on Save in web development! (Which get changed for python tkinter).
When ever I change something in my python file which contains tkinter code, the change should be reflected in the main window (the main window should not re-open to reflect the changes).
I have tried to search on web as well as on stack over flow, but all the results are for updating value in entry, label, buttons etc. But what I want is, the whole window should be updated when ever I change something in my main file, and the main window should not be reopened to do so. So in short, updating whole window without closing it, on every changes in the main file or automatically reload your program on save without reopening!
What have I tried?:
I tried to detect change in file using os.getsize which satisfied the first part of my question, but however I am not able to solve the second part i.e window should not be closed.
import os
main__tkinter_filename="myfile.py"
initial_filesize=os.path.getsize(main_tkinter_filename) # Getting size of the file for
# comparison.
while 1:
final_filesize=os.path.getsize(main_tkinter_filename)
if final_filsize<intial_filesize or final_filesize>initial_filesize:
webbrowser.open(main_tkinter_filename)
Example:
from tkinter import *
root=Tk()
root.mainloop
results in the below GUI:
If i have added a=Label(text='text')anda.pack() after root=Tk(), it should show me the label, and if i have removed the same code, it should remove them.
I will answer your question by the best of my understanding,
I have some (a few projects of my own, still way too limited) experience with flutter which has hot-reload feature (same as you described above, which you want with python, mainly tkinter), I recently switched to python for gui (Loved it!), so I would like to share my research here:
I was successfully able to set up hot-reload both with kivy (kivymd hot reload, which comes with watchdog and kaki, which works real-time), and with tkinter, while there is a hitch with the later, you will have to press Ctrl + R as to reload the tkinter window, but it works without having to re-run the python program, I will leave the link to the found resources here, hope it helps with your query!
To setup hot-reload with tkinter (requires Ctrl + R), please refer here.
To setup hot-reload with kivy/kivymd (real-time), which I personally prefer, you can find the official docs here.
To mention, I use the above on Manjaro (Arch linux) with pycharm, atom, but I have also tried and have made it run successfully on Windows 10 with vs code (worked like charm)
Hope I could be of help! If you face any problem regarding the same, please feel free to ask! Thanks!
After digging around I have finally found out a way to implement hot reload feature (which #Stange answers provides) but just updating the selected frame or code.
The basic idea is constanly reading the file and executing the selected code, and removing the object in a list which are meant to be removed.
# Live Checker.py
import keyboard
while 1:
if keyboard.is_pressed("Ctrl+r"):
with open('test.py','r') as file:
file_data=file.read()
file_data_start_index=file_data.find("'#Start#'")
file_data_end_index=file_data.find("'#End#'")
exec_command=file_data[file_data_start_index:file_data_end_index]
with open('exec_log.txt','w') as txt_file:
txt_file.write(exec_command)
Here I am constantly checking if if ctrl+r key is pressed, and if pressed
it reads the file,
writes the selected code from the file into a txt file.
I have specified the start and end of the code to be updated by #Start# and #End# respectively.
# Main.py
def check():
with open('exec_log.txt','r') as exec_c:
exec_command=exec_c.read()
if len(exec_command)==0:
pass
else:
print(exec_command)
exec('for i in root.winfo_children():i.destroy()\n'+exec_command)
print('exec')
with open('exec_log.txt','w') as exec_c:
pass
root.update()
root.after(100,check)
root.after(100,check)
And in the main file, i have added the above code which continusly check if exec_log.txt file has any changes, and if changes are there, then it executes them and all so destroys the widget specified in the remove_list.
This is just a temporary solution which in my case helps me to implement the hot reload feature in tkinter.
I am currently making an embedded multi-touch software using Kivy.
However, our hardware spec is little tight, so I am trying to optimize GUI for better performance.
Then I've found that Kivy Popup is slow when first pops up then gets faster after that. So now I am guessing that Kivy is doing some caching.
So, I want widgets, especially popups and screens since they are very slow, to act like they were opened once before.
I've tried to open and dismiss every popup widgets and go through all the screens when initializing the program. It seems quite effective except that I could not figure out how to hide the screen changing yet, but I am looking for some better approach.
I've looked for kivy document about kivy.cache here
But it is not clear whether this is what I am looking for or not. In addition, it is hard to understand what do I have to do and what to expect as a result. (Seems it does not work in a way that I want anyway)
It would probably be best to find what takes most time during the first startup, to make sure to cache that, instead of preloading every possible widget. One possibility is that it's just loading the default style texture, which you can load by setting the source of any image widget to images/defaulttheme-0.png, the first widget that needs it (that includes popup) will not to load it itself if you do. If you find that even after displaying a Button, the first Popup is still slow to load, then that's certainly something else, maybe running kivy at trace log_level will help seeing what happens last before the slowdown.
python -c kivy:log_level:trace main.py
I have been implementing in a drop down menu (offically called a "Tkinter.OptionMenu") inside my application, that once clicked open will allow users to skip to certain parts of the form (like skipping to a certain chapter of a book/play). I want to be able to OPEN that drop down menu on an event i.e with code however as much as i have searched, it seems the very best i can do i to do a .focus_set() which is better than nothing, but all it does it place a faint outline around the widget. I would like it to fully open it up, just as if the user had clicked on it.
I'm pretty sure that i'm missing something simple, but help would be appreciated :)
Edit: Yes, i do have good reason to programatically open it, and even if i didn't it would still be nice to find out. I do not need access to the functions the list gives, but rather, i need the user to pick something from that drop down, and so i would like to open it for them
I’d like to create a restricted folder/ file explorer in Python (I have version 2.7.9, but I don’t mind changing that) for Windows.
Essentially, I want to initially specify the folder to which the code opens. For example, the code should initially open to: C:\Users\myName\Desktop\myDemoFolder (the user must not know this folder simply by looking at the GUI).
The user must be able to browse downwards (deeper into folders) and backwards (but only up to the initial folder to which the code opens). The user must be able to click to open a file (for example: pdf), and the file must automatically open in its default application.
An example of what I’d like is presented in figure 1. (The look of the interface is not important)
Currently, I am able to get figure 2 using the code presented here:
from Tkinter import Tk
from tkFileDialog import askopenfilename
Tk().withdraw()
filename = askopenfilename()
print(filename)
Research has indicated that it is not possible to change the default buttons in Tkinter windows. Is this true? If it can’t be done with Tkinter (and that’s fine), how else can we do it?
I’d happily choose simple, non-Tkinter code (perhaps using wxPython’s wx.GenericDirCtrl()) rather than elaborate Tkinter code, but no restrictive libraries please.
A modular design approach is not needed. I’d rather have simple (functional) code that is shorter than object-oriented code.
I was trying to do the same thing when I realized that maybe you could create all the buttons you need and then set the color of the buttons you don't need to your background color using:
button-name.config(bg = "background-color")
Just change the "button-name" to your button's name and set "background-color" to the background color!