I am trying to position my buttons using the grid manager, by altering the column and row arguments of the .grid() function. However, whenever I input values > 1, there seems to be no change in position of my widgets. Why is this?
import tkinter as tk
window = tk.Tk()
window.geometry("500x500")
window.rowconfigure(0,weight=1)
window.columnconfigure(0,weight=1)
f1 = tk.Frame(window,bg="black")
f1.grid(row=0,column=0,sticky="nsew")
btn1 = tk.Button(f1,text="button")
btn1.grid(row=0,column=0,padx=5,pady=5)
lbl = tk.Label(f1,text="label")
lbl.grid(row=3,column=3)
window.mainloop()
Related
I've been trying out panedWindows for my app layout, but I'm having issues when the window resizes. This is the layout I've started out with:
The panes drag as I want them too, but I want to specify what panes expand to fill the root window, and which ones stay a specific width. For example, when I drag the window to the right or left, the pane on the expanding size extends to fill the extra space. I want only the centre pane to expand, and the right and left only when the sash is dragged:
like this:
When the panes were managed with the pack geometry manager, I could tell the edge panes to stay a specific width, and tell the centre pane to expand. How can I achieve a similar layout with paned windows?
Heres a minimal working example:
import tkinter
root = tkinter.Tk()
root.geometry("480x200+200+200")
root.title("Paned Window Example")
main = tkinter.PanedWindow()
main.pack(expand = 1, fill = "both")
pane1 = tkinter.Frame(width = 90, bg = "red")
pane2 = tkinter.Frame(width = 310, bg = "blue")
pane3 = tkinter.Frame(width = 90, bg = "red")
for pane in pane1, pane2, pane3 : main.add(pane)
root.mainloop()
You can use the stretch option when adding the panes to the PanedWindow. It takes the following values: 'always', 'first', 'last', 'middle', and 'never'.
You can get a more complete description in the tcl/tk documentation.
In your case, use 'never' for the side panes and 'always' for the middle one:
import tkinter
root = tkinter.Tk()
root.geometry("480x200+200+200")
root.title("Paned Window Example")
main = tkinter.PanedWindow()
main.pack(expand=True, fill="both")
pane1 = tkinter.Frame(width=90, bg="red")
pane2 = tkinter.Frame(width=310, bg="blue")
pane3 = tkinter.Frame(width=90, bg="red")
main.add(pane1, stretch='never')
main.add(pane2, stretch='always')
main.add(pane3, stretch='never')
root.mainloop()
Note that the above solution works only for tkinter.PanedWindow and not for ttk version of the widget. The .add() method of ttk.PanedWindow accepts only one option: weight. But we can achieve the same result by setting the side panes' weight to 0 and the middle pane's to 1:
import tkinter
from tkinter import ttk
root = tkinter.Tk()
root.geometry("480x200+200+200")
root.title("Paned Window Example")
main = ttk.PanedWindow(orient='horizontal')
main.pack(expand=True, fill="both")
pane1 = tkinter.Frame(width=90, bg="red")
pane2 = tkinter.Frame(width=310, bg="blue")
pane3 = tkinter.Frame(width=90, bg="red")
main.add(pane1, weight=0)
main.add(pane2, weight=1)
main.add(pane3, weight=0)
root.mainloop()
I'm in the beginning stages of building a program where I can take items from a TreeView and move them into a listbox. I have added scrollbars to both the Treeview and listbox so that as they get longer, I can scroll to see the contents. Currently, I have populated the Treeview with more items than can fit in the window. I have the ability to scroll the Treeview with the mouse wheel, but when I click and drag the box on the scrollbar, the scrollbar will not move. I'm using Python 3.7. I could use some help figuring out what's going on.
import tkinter as tk
from tkinter import ttk
import l5x
root = tk.Tk()
root.geometry("600x400")
root.resizable(False, False)
root.title("TreeView Example")
tree_frame = ttk.Frame(root)
list_frame = ttk.Frame(root)
tree = ttk.Treeview(tree_frame)
tree_scroll = ttk.Scrollbar(tree_frame,orient="vertical",command=tree.yview())
tree.configure(yscrollcommand=tree_scroll.set)
listbox = tk.Listbox(tree_frame)
list_scroll = ttk.Scrollbar(tree_frame,orient="vertical",command=listbox.yview())
listbox.configure(yscrollcommand=list_scroll.set)
tree_frame.columnconfigure(0, weight=1)
tree_frame.columnconfigure(1, weight=1)
tree_frame.columnconfigure(2, weight=1)
tree_frame.columnconfigure(3, weight=1)
for i in range(0,20):
tree.insert('','end',i,text="blah")
tree_frame.grid(row=0,column=0,sticky="NSEW")
tree.grid(row=0,column=0,sticky="NSEW")
tree_scroll.grid(row=0,column=1,sticky="NS")
listbox.grid(row=0,column=2,sticky="NSEW")
list_scroll.grid(row=0,column=3,sticky="NS")
root.mainloop()
The command attribute requires you pass a reference to a callable function. Instead, you're calling the yview() method and giving the results to the command attribute.
Your scrollbar definition needs to look like this:
tree_scroll = ttk.Scrollbar(tree_frame,orient="vertical",command=tree.yview)
list_scroll = ttk.Scrollbar(tree_frame,orient="vertical",command=listbox.yview)
I'm trying to equally distribute three objects/widgets across one row in a ttk notebook tab, but the three objects only expand half of the window.
I'm not sure what controls the number of columns within a tab since columnsspan in tab.grid(row=0, columnspan=3) doesn't appear to change anything. I've also tried various values for rows and columns for every object with .grid. This is only an issue for notebook tabs, rather than a single window.
#!/usr/bin/env python3
from tkinter import ttk
from tkinter import *
root = Tk()
root.title('Title')
root.resizable(width=FALSE, height=FALSE)
root.geometry('{}x{}'.format(750, 750))
nb = ttk.Notebook(root)
nb.grid(row=0, column=0)
# Add first tab
tab1 = ttk.Frame(nb)
#tab1.grid(row=0, column=0)
nb.add(tab1, text='Setup')
# Add row label
lb1 = ttk.Label(tab1, text = 'Parent Directory:')
lb1.grid(row = 1, column = 1)
# Add text entry
txt1 = ttk.Entry(tab1)
txt1.grid(row = 1, column = 2)
# Add selection button
btn1 = ttk.Button(tab1, text="Select")
btn1.grid(row=1, column=3)
root.mainloop()
I'm expecting the columns to span the full length of the window, instead of half the length of the window.
In order to do this using grid you need to use the Frame.columnconfigure([column#], minsize=[minsize]) function.
If you want the text box and button to stretch to fill the space, use the sticky option. (Sticky doesn't really do anything with the label)
Code:
#!/usr/bin/env python3
from tkinter import ttk
from tkinter import *
root = Tk()
root.title('Title')
root.resizable(width=FALSE, height=FALSE)
root.geometry('{}x{}'.format(750, 750))
nb = ttk.Notebook(root, width=750)
nb.grid(row=0, column=0)
# Add first tab
tab1 = ttk.Frame(nb)
#tab1.grid(row=0, column=0)
nb.add(tab1, text='Setup')
# Change the sizes of the columns equally
tab1.columnconfigure(1, minsize=250)
tab1.columnconfigure(2, minsize=250)
tab1.columnconfigure(3, minsize=250)
# Add row label
lb1 = ttk.Label(tab1, text = 'Parent Directory:')
lb1.grid(row = 1, column = 1,sticky=(E,W))
# Add text entry
txt1 = ttk.Entry(tab1)
txt1.grid(row = 1, column = 2,sticky=(E,W))
# Add selection button
btn1 = ttk.Button(tab1, text="Select")
btn1.grid(row=1, column=3,sticky=(E,W))
root.mainloop()
Image of result
I'm learning Tkinter at the moment. From my book, I get the following code for producing a simple vertical scrollbar:
from tkinter import * # Import tkinter
class ScrollText:
def __init__(self):
window = Tk() # Create a window
window.title("Scroll Text Demo") # Set title
frame1 = Frame(window)
frame1.pack()
scrollbar = Scrollbar(frame1)
scrollbar.pack(side = RIGHT, fill = Y)
text = Text(frame1, width = 40, height = 10, wrap = WORD,
yscrollcommand = scrollbar.set)
text.pack()
scrollbar.config(command = text.yview)
window.mainloop() # Create an event loop
ScrollText() # Create GUI
which produces the following nice output:
enter image description here
However, when I then try to change this code in the obvious way to get a horizontal scrollbar, it's producing a weird output. Here's the code I'm using
from tkinter import * # Import tkinter
class ScrollText:
def __init__(self):
window = Tk() # Create a window
window.title("Scroll Text Demo") # Set title
frame1 = Frame(window)
frame1.pack()
scrollbar = Scrollbar(frame1)
scrollbar.pack(side = BOTTOM, fill = X)
text = Text(frame1, width = 40, height = 10, wrap = WORD,
xscrollcommand = scrollbar.set)
text.pack()
scrollbar.config(command = text.xview)
window.mainloop() # Create an event loop
ScrollText() # Create GUI
and here's what I get when I run this:
enter image description here
You're assigning horizontal scrolling, xscrollcommand, to a vertical scrollbar. You need to modify Scrollbar's orient option to 'horizontal' which is by default 'vertical'.
Try replacing:
scrollbar = Scrollbar(frame1)
with:
scrollbar = Scrollbar(frame1, orient='horizontal')
I am new to tkinter and python3. I have worked on creating a scrollbar for a frame that is a child of a canvas which is also a child of Toplevel(). The scrollbar buttons function well but the bar/box itself stretches from top to bottom and cannot move. Furthermore, using the scroll buttons, the user can scroll way beyond the content (where there nothing to view).
Here is the code.
#! /usr/bin/env python3
from tkinter import *
from filegroups import typeGroups
app = Tk()
types_window = Toplevel(app)
types_window.wm_title('Types')
yscrollbar = Scrollbar(types_window, orient=VERTICAL)
yscrollbar.grid(row=0, column=1, sticky=N+S)
canvas = Canvas(types_window,
width = 300,
height = 500,
yscrollcommand=yscrollbar.set)
canvas.grid(row=0,column=0)
canvas.config(scrollregion=canvas.bbox("all"))
yscrollbar.config(command=canvas.yview)
frame = Frame(canvas)
canvas.create_window(0,0,anchor=NW,window=frame)
for key in sorted(typeGroups.keys()):
options_frame = LabelFrame(frame, text=key)
options_frame.grid(padx=5, pady=10)
for item in typeGroups[key]:
item_button = Checkbutton(options_frame,
text=item)
item_button.grid()
app.mainloop()
You need to update the canvas scrollregion after filling the frame with labels by adding these two lines just before app.mainloop():
canvas.update_idletasks()
canvas.config(scrollregion=canvas.bbox("all"))
The call to update_idletasks is needed to ensure that the canvas content is updated before we ask for the bounding box.