I want this entry bar and other contents I'll add to the frame later to be centred correctly, I received this code that supposedly should work but it isn't.
import tkinter as tk
import math
import time
root = tk.Tk()
root.geometry()
root.attributes("-fullscreen", True)
exit_button = tk.Button(root, text = "Exit", command = root.destroy)
exit_button.place(x=1506, y=0)
frame = tk.Frame(root)
main_entry = tk.Entry(root, width = 100, fg = "black")
main_entry.place(x=50, y=50)
frame.place(relx=.5,rely=.5, anchor='center')
root.mainloop()
As you can see the frame isn't centred so how can I fix this?
In order to achieve widget centering on a fullscreen I've had to use grid manager.
The code below works but the exact positioning requires some fiddling with frame padding.
frame padx = w/2-300 and pady = h/2-45 are arbitrary values found using a bit of trial and error.
import tkinter as tk
root = tk.Tk()
root.attributes( '-fullscreen', True )
w, h = root.winfo_screenwidth(), root.winfo_screenheight()
frame = tk.Frame( root )
main_entry = tk.Entry( frame, width = 100 )
main_entry.grid( row = 0, column = 0, sticky = tk.NSEW )
frame.grid( row = 0, column = 0, padx = w/2-300, pady = h/2-45, sticky = tk.NSEW )
exit_button = tk.Button( frame, text = 'Exit', command = root.destroy )
exit_button.grid( row = 1, column = 0, sticky = tk.NSEW )
tk.mainloop()
Frame automatically changes size to size of objects inside Frame (when you use pack()) but you have nothing inside Frame. You put all widgets directly in root - so Frame has no size (width zero, height zero) and it is not visible.
When I use tk.Frame(root, bg='red', width=100, height=100) then I see small red frame in the center.
You have two problems:
(1) you put Entry in wrong parent - it has to be frame instead of root,
(2) you use place() which doesn't resize Frame to its children and it has size zero - so you don't see it. You would have to set size of Frame manully (ie. tk.Frame(..., width=100, height=100)) or you could use pack() and it will resize it automatically.
I add colors for backgrounds to see widgets. blue for window and red for frame.
import tkinter as tk
root = tk.Tk()
root['bg'] = 'blue'
root.attributes("-fullscreen", True)
exit_button = tk.Button(root, text="Exit", command=root.destroy)
exit_button.place(x=1506, y=0)
frame = tk.Frame(root, bg='red')
frame.place(relx=.5, rely=.5, anchor='center')
main_entry = tk.Entry(frame, width=100, fg="black")
main_entry.pack(padx=50, pady=50) # with external margins 50
root.mainloop()
Related
The left side of the box is aligned with the left side of some_label. I am unable to set the width so that the right side of some_label also aligns with the right side of the box because the increments between different width values are too large. A width of 35 puts the right end of some_label too far left and a width of 36 puts it too far right.
from tkinter import *
root = Tk()
root.geometry('500x500')
box = Frame(root, width=383, height=246, bg='black')
box.place(x=241, y=65, anchor=CENTER)
some_label = Label(root, text='Some Label', borderwidth=1, relief='solid')
some_label.place(x=50, y=210)
some_label.config(width=35, font=('TkDefaultFont', 15)) # whether width is 35 or 36, the label never aligns with the box
mainloop()
Since you use place(), you can specify the width directly:
import tkinter as tk
root = tk.Tk()
root.geometry('500x500')
box = tk.Frame(root, width=383, height=246, bg='black')
box.place(x=241, y=65, anchor='c')
some_label = tk.Label(root, text='Some Label', borderwidth=1, relief='solid')
some_label.place(x=241, y=210, width=383, anchor='c') # set width to same as 'box'
some_label.config(font=('TkDefaultFont', 15))
root.mainloop()
To set the width of a Label in pixels you have to include an image. Easiest would to use a transparent pixel and present it in the label with compound='center' which does not offset the text.
Alternatively you could simply use a containing frame to control the widget sizes.
I have included both ways in my example.
from tkinter import *
root = Tk()
root.geometry('500x500')
box = Frame(root, width=383, height=246, bg='black')
box.place(x=241, y=65, anchor=CENTER)
some_label = Label(root, text='Some Label', borderwidth=1, relief='solid')
some_label.place(x=50, y=210)
img = PhotoImage(file='images/pixel.gif') # Create image
some_label.config(image=img, compound='center') # Set image in label
some_label.config(width=379, font=('TkDefaultFont', 15)) # Size in pixels
# Alternateivly control size by an containing widget:
container = Frame(root, bg='tan') # Let frame adjust to contained widgets
container.place(x=241, y=360, anchor=CENTER)
# Let the contained widget set width
other_box = Frame(container, height=100, width=383, bg='black') # Set width
other_box.pack()
other_label = Label(container, text='Some Label', borderwidth=1, relief='solid')
other_label.pack(expand=True, fill=X, pady=(20,0)) # Expand to fill container
other_label.config(font=('TkDefaultFont', 15))
mainloop()
If you are going to make complex GUI designs, grid() is almost always easier to use.
There is only one frame in my GUI, and it resizes itself to the size of the window. The frame has a child label, and I want the label to always be 1/3 the height of the frame and 1/1.5 the width of the frame. The code below tries to do that but the label always resizes itself to the size of the frame.
import tkinter
tk = tkinter.Tk()
tk.geometry("400x400")
f = tkinter.Frame(tk, bd=5, bg="white")
f.pack(padx=10, pady=10)
def callback(event):
f.config(height=tk.winfo_height(), width=tk.winfo_width())
l.config(width=int(f.winfo_width()/1.5), height=int(f.winfo_height()/3))
l = tkinter.Label(f, text="lead me lord", bg="yellow", relief=tkinter.RAISED, bd=5)
l.pack(side="bottom")
tk.bind("<Configure>", callback)
tk.mainloop()
The width and height of the label are in characters. In order to use pixels, you need to add an empty image to the label:
img = tkinter.PhotoImage() # an image of size 0
l = tkinter.Label(f, text="lead me lord", bg="yellow", relief=tkinter.RAISED, bd=5,
image=img, compound='center')
Actually you don't need to resize the frame in the callback if you add fill="both", expand=1 into f.pack(...):
import tkinter
tk = tkinter.Tk()
tk.geometry("400x400")
f = tkinter.Frame(tk, bd=5, bg="white")
f.pack(padx=10, pady=10, fill="both", expand=1)
def callback(event):
l.config(width=int(f.winfo_width()/1.5), height=int(f.winfo_height()/3))
#l.config(width=event.width*2//3, height=event.height//3) # same as above line if bind on frame
img = tkinter.PhotoImage()
l = tkinter.Label(f, text="lead me lord", bg="yellow", relief=tkinter.RAISED, bd=5,
image=img, compound='center')
l.pack(side="bottom")
f.bind("<Configure>", callback) # bind on frame instead of root window
tk.mainloop()
Given your precise specifications, the best solution is to use place since it lets you use relative widths and heights. However, if you plan to have other widgets in the window, place is rarely the right choice.
This example will do exactly what you asked: place the label at the bottom with 1/3 the height and 1/1.5 the width. There is no need to have a callback for when the window changes size.
Note: I had to change the call to pack for the frame. The text of your question said it would expand to fill the window but the code you had wasn't doing that. I added the fill and expand options.
import tkinter
tk = tkinter.Tk()
tk.geometry("400x400")
f = tkinter.Frame(tk, bd=5, bg="white")
f.pack(padx=10, pady=10, fill="both", expand=True)
l = tkinter.Label(f, text="lead me lord", bg="yellow", relief=tkinter.RAISED, bd=5)
l.place(relx=.5, rely=1.0, anchor="s", relheight=1/3., relwidth=1/1.5)
tkinter.mainloop()
I follow the tutorials online and the documentations but still can't add a border to a frame. The following is the code I run
import tkinter as tk
root = tk.Tk()
frame1 = tk.Frame(root, borderwidth=2 )
frame2 = tk.Frame(root, borderwidth=2 )
frame1.grid(row = 0)
frame2.grid(row = 1)
tk.Label(frame1, text = 'frame1').grid(row = 0)
tk.Label(frame2, text = 'frame2').grid(row = 0)
root.mainloop()
And this is the result I got. What's the problem?
You need to set the relief option to one of "raised", "sunken", "ridge", or "groove". On your system it appears the default is "flat". The final option is "solid".
It feels this should be easy but not as much as I would hope. All I want to do is put a button in a frame. My code is coloring the frame so I can validate the button is where I want to put it and as you can see, below, my code is not doing what I want/think. I expect my code to put the radio button inside the yellow frame - not under it.
from tkinter import *
class apiMain:
def main(self):
master=Tk()
topframe = Frame(master, bg="Lemon chiffon", width=500, height=50).pack(side = TOP)
v = IntVar()
crbutton = Radiobutton(topframe, text = "change request", variable = v, value = 'cr')
crbutton.pack(side = LEFT, padx = 10)
mainloop()
When you assign topframe like this:
topframe = Frame(master, bg="Lemon chiffon", width=500, height=50).pack(side = TOP)
You are essentially writing topframe = None, because pack() always returns None. Because of this, you're assigning the master of your radio button to None which defaults to the main window. Split your code up, so that topframe references the actual Frame object:
topframe = Frame(master, bg="Lemon chiffon", width=500, height=50)
topframe.pack(side = TOP)
I'm creating a very simple UI using Tkinter and python, but I'm having trouble sizing GUI elements and using the grid format to place them correctly. Here's a first-order approximation of what I'm trying to have:
Here's the code I have so far. I keep getting close, but I don't think I really understand what I'm doing. Any help is much appreciated!
#User interface
root = Tk()
window_width = root.winfo_screenwidth()
window_height = root.winfo_screenheight()
root.geometry ("%dx%d"%(window_width,window_height))
menu_bar = Menu(root)
menu = Menu(menu_bar, tearoff=0)
menu.add_command(label="Open", command = open_file)
menu.add_command(label="Save", command = save)
menu.add_separator()
menu.add_command(label="Quit", command = exit)
menu_bar.add_cascade(label="File",menu=menu)
root.config(menu=menu_bar)
#textbox is the window in which the code is written
textbox = Text(root, width=50, height = window_height/20+4)
#canvas is where the car will go
canvas_frame= Frame(root, width = window_width/1.5, height = window_height-200)
canvas_frame.configure(borderwidth=1.5,background='black')
canvas = Canvas(canvas_frame, width = window_width/1.5, height = window_height-200)
#console to print to
console = Text(root, width = int(window_width/1.5), height = 10)
run_button = Button(root, text = "Run", command = lambda:generate_program(textbox.get(1.0,END)))
clear_button = Button(root, text = "Clear text", command = clear)
#add them to frame
textbox.grid(row=0, column=0, rowspan=20, columnspan=10)
run_button.grid(row=21,column=0)
clear_button.grid(row=21,column=1)
canvas_frame.grid(row=0,rowspan=10,column=21,columnspan=25)
canvas.grid(row=0, rowspan=1, column=21, columnspan=25)
console.grid(row = 1, rowspan=1, column = 21, columnspan=25)
root.mainloop()
In my opinion, this is layout can be much easier with the pack geometry manager. One of the problems is that you are trying to make the width and the height of each widget fit in its place with rowspan and columspan options. Also, since canvasis inside a frame, you have to think that it is like inside a new window, so a simple call to canvas.grid() would be enough.
However, with pack() you just have to put textbox, run_button and clear_button inside a new frame:
left_frame = Frame(root)
textbox = Text(left_frame, ...)
run_button = Button(left_frame, ...)
clear_button = Button(left_frame, ...)
canvas_frame= Frame(root, ...)
canvas_frame.configure(borderwidth=1.5,background='black')
canvas = Canvas(canvas_frame, ...)
console = Text(root, ...)
left_frame.pack(side=LEFT)
textbox.pack()
run_button.pack(side=LEFT)
clear_button.pack()
canvas_frame.pack()
canvas.pack()
console.pack()