My program iterates through a list of values and creates a new frame with relevant information. I want to add a button to refresh the values in just one of the frames. The following image is a mockup of what I'm trying to achieve, where the "reload" button grabs new data for just one printer.
I'm running into an issue where only the last values get updated. The following code is an approximation of what I was trying:
import tkinter as tk
from tkinter import ttk
def buttonupdate(x):
return int(x.get())+1
root=tk.Tk()
values=[0,0,0,0,0,0,0]
stringVarList=[]
for i,item in enumerate(values):
newStringVar=tk.StringVar()
newStringVar.set(item)
stringVarList.append(newStringVar)
valueLabel=tk.Label(root, textvariable=stringVarList[i])
valueLabel.grid(row=0,column=i)
button=tk.Button(root, text="+1", command=lambda:stringVarList[i].set(buttonupdate(stringVarList[i])))
button.grid(row=1, column=i)
root.mainloop()
With this code, only the last value gets updated, no matter which button I press.
What can I try instead? Thank you.
Related
import sys
import webbrowser
import hou
from PySide2 import QtCore, QtUiTools, QtWidgets, QtGui
# Calling UI File & Some Modification
class someWidget(QtWidgets.QWidget):
def __init__(self):
super(someWidget,self).__init__()
ui_file = 'C:/Users/XY_Ab/Documents/houdini18.5/Folder_CGI/someUI.ui'
self.ui = QtUiTools.QUiLoader().load(ui_file, parentWidget=self)
self.setParent(hou.qt.mainWindow(), QtCore.Qt.Window)
self.setFixedSize(437, 42)
self.setWindowTitle("Requesting For Help")
window_C = someWidget()
window_C.show()
So, I have created this small script that shows the UI, I have connected this to Houdini Menu Bar. Now The Problem is if I click the menu item multiple times it will create another instance of the same UI & the previous one stays back, What I want is something called "If Window Exist Delete It, Crate New One" sort of thing.
Can someone guide me? I am fairly new to python in Houdini and Qt so a little explanation will be hugely helpful. Also, why can't I use from PySide6 import?? Why do I have to use from PySide2?? Because otherwise Houdini is throwing errors.
For the same thing what used to do in maya is
# Check To See If Window Exists
if cmds.window(winID, exists=True):
cmds.deleteUI(winID)
Trying to do the same thing inside Houdini.
I don't have Maya or Houdini, so I can't help you too much.
According to https://www.sidefx.com/docs/houdini/hom/cb/qt.html
It looks like you can access Houdini's main window. The main reason the window is duplicated or deleted is how python retains the reference to window_C. You might be able to retain the reference to just show the same widget over and over again by accessing the main Houdini window.
In the examples below we are using references a different way. You probably do not need your code that has
self.setParent(hou.qt.mainWindow(), QtCore.Qt.Window)
Create the widget once and keep showing the same widget over and over.
import hou
# Create the widget class
class someWidget(QtWidgets.QWidget):
def __init__(self, parent=None, flags=QtCore.Qt.Window): # Note: added parent as an option
super(someWidget,self).__init__(parent, flags)
...
MAIN_WINDOW = hou.ui.mainQtWindow()
try:
MAIN_WINDOW.window_C.show()
except AttributeError:
# Widget has not been created yet!
# Save the widget reference to an object that will always exist and is accessible
# parent shouldn't really matter, because we are saving the reference to an object
# that will exist the life of the application
MAIN_WINDOW.window_C = someWidget(parent=MAIN_WINDOW)
MAIN_WINDOW.window_C.show()
To delete the previous window and create a new window.
import hou
# Create the widget class
class someWidget(QtWidgets.QWidget):
def __init__(self, parent=None, flags=QtCore.Qt.Window): # Note: added parent as an option
super(someWidget,self).__init__(parent, flags)
...
MAIN_WINDOW = hou.ui.mainQtWindow()
# Hide the previous window
try:
MAIN_WINDOW.window_C.close()
MAIN_WINDOW.window_C.deleteLater() # This is needed if you parent the widget
except AttributeError:
pass
# Create the new Widget and override the previous widget's reference
# Python's garbage collection should automatically delete the previous widget.
# You do not need to have a parent!
# If you do have a parent then deleteLater above is needed!
MAIN_WINDOW.window_C = someWidget() # Note: We do not parent this widget!
MAIN_WINDOW.window_C.show()
Another resource shows you can access the previous widget from the page level variable. https://echopraxia.co.uk/blog/pyqt-in-houdinimaya-basic This is possible, but seems odd to me. The module should only be imported once, so the page level variable "my_window" should never exist. However, it sounds like the Houdini plugin system either reloads the python script or re-runs the import. If that is the case every time you show a new window from the import of the script, you are creating a new window. If the previous window is not closed and deleted properly, Houdini could have an ever growing memory issue.
try:
my_window.close()
except (NameError, Exception):
pass # Normal python would always throw a NameError, because my_window is never defined
my_window = MyWindow()
#This is optional you can resize the window if youd like.
my_window.resize(471,577)
my_window.show()
PySide6
https://www.sidefx.com/docs/houdini/hom/cb/qt.html
The bottom of the page shows how to use PyQt5. The same would apply for PySide6. Houdini just happens to come with PySide2.
I have written some code in python for a live time in tkinter.
Whenever I run the code it comes up with some numbers on the tkinter window like 14342816time. Is there a way to fix this?
import tkinter
import datetime
window = tkinter.Tk()
def time():
datetime.datetime.now().time()
datetime.time(17, 3,)
print(datetime.datetime.now().time())
tkinter.Label(window, text = time).pack()
window.mainloop()
After some fixes to your code, I came up with the following, which should at least get you started toward what you want:
import datetime
import tkinter
def get_time():
return datetime.datetime.now().time()
root = tkinter.Tk()
tkinter.Label(root, text = get_time()).pack()
root.mainloop()
The imports are needed so that your program knows about the contents of the datetime and tkinter modules - you may be importing them already, however, I can't tell that for certain from what you posted. You need to create a window into which you put your label, which wasn't happening; following convention, I called that parent (and only) window "root". Then I put the Label into root. I changed the name of your time() function to get_time(), since it's best to avoid confusing fellow programmers (and maybe yourself) with a function that shares its name with another (the time() function in time). I removed two lines in get_time() that don't actually accomplish anything. Finally, I changed the print you had to a return, so that the value can be used by the code calling the function.
There are other improvements possible here. If you're content with the time as it is, you could eliminate the get_time function and just use datetime.datetime.now().time() instead of calling get_time(). However, I suspect you might want to do something to clean up that time before it is displayed, so I left it there. You might want to research the datetime and time modules some more, to see how to clean things up.
I am looking for a way to write information for my treeview in tkinter. I wrote this by using the set method but my sentences disappear when I write on the next line. I want my information for the teeeview to display when I move to the next line.
from tkinter import *
from tkinter import ttk
root =Tk()
tree = ttk.Treeview(root)
tree.insert("","0","item1",text="LANGUAGE")
tree.insert("","1","item2",text="GUI")
tree.insert("item1","1",text="Version")
tree.insert("item2","end",text="Tkinter")
tree.config(columns=("NOTE"))
tree.column("NOTE",width=300)
tree.heading("NOTE",text="Info")
tree.set("item1","NOTE","Am using python version 3.6.1 \n on windows machine
")
tree.set("item2","NOTE","This an example Tkinter Treeview in Python, which
is from \nttk class make sure import ttk\n also from tkinter import *")
tree.pack()
root.mainloop()
Are there any methods in treeview I can use to display this, because I want to write a lot of information for the treeview?
You need to increase the height of the rows so that all your text will be visible. The height of the rows can only be modified by using a style:
style = ttk.Style(root)
style.configure('my.Treeview', rowheight=50)
tree.configure(style='my.Treeview')
As far as I know, it is not possible to adjust the height of a single row.
I am trying to make a basic 4 frame animation, I cannot use a tkinter canvas as I want it to use the art which I have drawn (the files). There is nothing wrong with the file type as I have tested it on its own. However the code seems to just remove the window for the 6 seconds and then show the final frame.
import time
import tkinter
window=tkinter.Tk()
frame1=tkinter.PhotoImage(file="file1.ppm")
frame2=tkinter.PhotoImage(file="file2.ppm")
frame3=tkinter.PhotoImage(file="file3.ppm")
frame4=tkinter.PhotoImage(file="file4.ppm")
image=tkinter.Label(window,image=frame1)
image.pack()
time.sleep(2)
image.configure(image=frame2)
time.sleep(2)
image.configure(image=frame3)
time.sleep(2)
image.configure(image=frame4)
I'm not sure whether it is the "time.sleep" or the "image.configure" that is the problem but I have tried to mess around with different types of timing methods which also seem to fail.
import tkinter
window=tkinter.Tk()
frame1=tkinter.PhotoImage(file="file1.ppm")
frame2=tkinter.PhotoImage(file="file2.ppm")
frame3=tkinter.PhotoImage(file="file3.ppm")
frame4=tkinter.PhotoImage(file="file4.ppm")
image=tkinter.Label(window,image=frame1)
image.pack()
def loop(n):
frame = [frame1, frame2, frame3, frame4][n]
window.after(2000, lambda : image.configure(image=frame))
window.after(2000, lambda : loop((n+1)%4))
loop(1)
I wrote a script in python 3.4 where I'm making use of the tkinter module to build the GUI and pandas/matplotlib to visualise some data. The visualisation is being produced in a new window through the use of a button in the main window. The problem is that when I close the window that contains the graph (produced by pandas/matplot) the main window widgets are completely unresponsive. Furthermore, when I try to close the main window (through the 'X' button) I get a Fatal Python error: PyEval_RestoreThread: NULL tstate, which I don't get if I close the window without producing the graphs.
In simple words: the rest of the application behaves as it should if I never produce the graphs and becomes completely unresponsive if I do.
Below are the code segments of the caller of the plotting method in the main window and the method itself where the use of pandas and matplot is clearly shown.
Caller:
button_view_browsers = tk.Button(window, text="Display graph", command=lambda: self.threaded_browser_hist(doc))
button_view_browsers.grid(row=2, column=1, sticky=W+E+N+S, columnspan=3)
Visualisation method:
def display_browser_hist(self, data):
ser = Series(data.viewer_browser())
ser.value_counts().plot(kind='bar')
matplotlib.pyplot.show()
def threaded_browser_hist(self, doc):
Thread(target=self.display_browser_hist(doc)).start()
Any help would be greatly appreciated.
EDIT: Just to be sure I'm also including the modules I'm using and how I'm importing them:
from pandas import Series
import matplotlib
import tkinter as tk
from tkinter import W, E, N, S