I got another little question...
I want to make multiple variables which I create with 'setattr'
That works quite fine. It creates these variables:
self.sectionButton_1 = Button(text=x)
self.sectionButton_2 = Button(text=x)
self.sectionButton_3 = Button(text=x)
Now I want them to get displayed on the window with tkinter so that this should happen:
self.sectionButton_1.grid(row=i, column=0)
self.sectionButton_2.grid(row=i, column=0)
and so on..
But how do I have to edit the loop that the sectionButtons gonna be created with .grid from tkinter in a loop without writing the above ten times.
# Display Section selection
def checkSection(self):
# Read all sections from config
self.sections = config.sections()
self.sectionsCount = str(len(self.sections))
self.i = 0
self.text = Label(text="Choose Section:" + self.sectionsCount)
self.text.grid(row=1, column=0)
for x in self.sections:
i = +1
setattr(self, 'sectionButton_' + str(i), Button(text=x))
I'm not that good at explaining but hopefully its enough to understand my problem ^^
If not, just comment, I will try to answer it
If you have a group of related variables of the same type and you're doing the same operations to each one then that's a natural place to switch to using a list instead of individual variables.
Your code would become more like:
self.sectionButtons = []
for i, x in enumerate(self.sections):
button = Button(text=x)
button.grid(row=i+1, column=0)
self.sectionButtons.append(button)
This also has the advantage of no longer needing to construct the variable names as strings and use setattr, which is often a sign there's a better way.
Related
I am trying to create a list like in outlook. With list items with an layout like this:
Don't get me wrong this isn't a "give me the full answer" question. I just have the problem of the right naming. I would appreciate it a lot if some could throw in the right words and I will look for them by my own.
I used tkinter at the moment but in that it seems like there isn't a solution for that.
Kind regards.
I think Tkinter can do this by using a bit of object oriented programming you could define how one list element should look like and then with static variables you could define a position of a new line relative to the position of the previous line. Something like:
from tkinter import *
class Line:
y = 0 # static variable for the y position
def __init__(self):
self.y_local = Line.y
Line.y = Line.y + 40 # increase the static variable for the next line
print(self.y_local)
def draw(self, tk, h_line="Headline", a_info="Addtional Information", date="01/01/1970"):
self.label_head = Label(text=h_line)
self.label_head.place(x=20, y=self.y)
self.label_info = Label(text=a_info)
self.label_info.place(x=20, y=self.y+20)
self.label_date = Label(text='Date')
self.label_date.place(x=200, y=self.y)
self.label_ndate = Label(text=date)
self.label_ndate.place(x=200, y=self.y+20)
self.chkbtn = Checkbutton(tk, text="Checkbox")
self.chkbtn.place(x=300, y=self.y+20)
tk = Tk()
data = [
["News", "WWIII has been avoided", "02/04/2018"],
["Python", "Python solves 42 riddles", "02/04/2018"]
]
for line in data:
temp = Line()
temp.draw(tk, line[0], line[1], line[2])
mainloop()
Hope I understood your question well. That you have a list with information and want to display that in an easy and scalable way. I have not looked to add the lines around the information as I've never done that before I know there are separators I've used vertical once before but I wouldn't be surprised if you can draw a box around each line either.
Hy All,
I'm creating a layout for a database, and made a big canvas which are the lines, spawning smaller canvas inside them (as cells) to contain labels for the data. It looks nice, but the problem is, that due to this "mass-creation" of canvas and label widgets, none of them stays uniqly addressable, they are all named after the same variable when created in a for loop. Any idea how to tag/address them during the creation so I can edit them later?
for f in range(15)
z = z+1
f = Label(someFrame, width = 45 if z < 4 else 12, text = f, borderwidth=2, relief="groove", bg = "#E5E5E5" if Color == True else "#B2B2B2" )
f.pack(side = LEFT)
It may look a bit messy, but you have a picture at least how the widgets are being created and what is my issue.
You can store your widgets in a dictionary. Something like this:
widget_dict = {}
for idx in range(10):
widget_dict['abc' + str(idx)] = label(root, ...)
Then you can access each widget through its dictionary key:
widget_dict[abc2].config(text='Banana')
Before your for loop create a list. Then inside of the for loop just append every label to the list. Or you can use a dictionary to store them, depending on how you want to deal with that.
I was making an application using tkinter and came across an error. I wanted people to input a variable, which I have made, and then have that many Entry boxes popup on the screen for input. I was wondering what is wrong with my code, if it is possible, or if there is a better way. Thanks in advance!
p.s. the NoOfBoxes has been predefined
int(NoOfBoxes)
x = 1
while(NoOfBoxes>=x):
a = a + 50
fill_empty(a)
x = x + 1
def fill_empty():
empty = tk.Entry(self)
empty.grid(row=200,column=a)
return empty
In first line of shown code, you are converting NoOfBoxes to an integer but you are not assigning back it to NoOfBoxes hence, when while line comes, NoOfBoxes is still not an integer. Also, there is no parameter on your fill_empty definition.
Most likely you will need those Entry widgets at some point in your code, so it'll be much better if you keep references.
listOfEntries = [fill_empty(idx) for idx in range(int(NoOfBoxes))]
def fill_empty(a):
empty = tk.Entry(self)
empty.grid(row=200,column=a)
return empty
When you want to make any operation on those, you can easily do something like:
listOfEntries[0].get()
My program is an IFS editor which has two windows: one for displaying a fractal and the other for working with the corresponding IFS. The latter requires a grid of entries containing the values of linear transformations. Since I need 24 entries (6 entries for each linear transformation, and 4 transformations), I defined instead a table of entries using some for loops. I know that I have to set textvariable to StringVar and use StringVar.set() for putting in some default values, but when I run my program, the entries are still empty.
This is what I have. Here "matrices" is a 4x6 matrix of floats:
FunctionEntries=[[],[],[],[]]
FunctionSetEntries=[[],[],[],[]]
for i in range(4):
for j in range(6):
FunctionSetEntries[i]=FunctionSetEntries[i]+[Tkinter.StringVar()]
k=Tkinter.Entry(window, width="5", textvariable = FunctionSetEntries[i][j])
FunctionSetEntries[i][j].set(matrices[i][j])
FunctionEntries[i]=FunctionEntries[i]+[k]
FunctionEntries[i][j].grid(row=3+i,column=j+1)
FunctionEntries=FunctionEntries+[FunctionEntries[i]]
The strange part is that when I defined some other entries individually, everything was ok. Here were some of the entries that showed the default values correctly:
P=[0.85,0.07,0.07,0.01]
probs1=Tkinter.StringVar()
probs1.set(P[0])
probs2=Tkinter.StringVar()
probs2.set(P[1])
probs3=Tkinter.StringVar()
probs3.set(P[2])
probs4=Tkinter.StringVar()
probs4.set(P[3])
probLabel=Tkinter.Label(FractalWindow, width="15")
probLabel.configure(text="probabilities= ")
probEntry1=Tkinter.Entry(FractalWindow, width= "5", textvariable = probs1)
probEntry2=Tkinter.Entry(FractalWindow, width= "5", textvariable = probs2)
probEntry3=Tkinter.Entry(FractalWindow, width= "5", textvariable = probs3)
probEntry4=Tkinter.Entry(FractalWindow, width= "5", textvariable = probs4)
The last few were in a different window, so is that part of the issue? But everything else in both windows is running fine as far as I can tell. I also don't see any difference between what I did here and what I did in the previous case (the order of the entry definition and .set() didn't change anything). The grids also display properly. The only thing wrong is that the entries are empty. What's going on here?
Thanks!
EDIT: There seems to be a problem with the double windows. I defined FractalWindow first, and the default values for my entries appear in FractalWindow, but not "window". On the other hand, if I define "window" first, the default values appear, but not for those in FractalWindow. Why is this happening?
FunctionSetEntries[i]=FunctionSetEntries[i]+[Tkinter.StringVar()] is going to contain a StringVar() 6 times, one for each "j". If you use one list with 24 entries for simplicity to start out, you can just do the following (and note that you only have to keep a reference to either the Entry or StringVar, not both, to get/set the contents).
function_entries=[]
for i in range(4):
for j in range(6):
s_var=Tkinter.StringVar()
function_entries.append(s_var)
Tkinter.Entry(window, width="5", textvariable = s_var).grid(etc)
## proof of concept when not using a nested list
for num in range(24):
row, column=divmod(num, 6)
print num, row, column
for row in range(4):
for column in range(6):
print "list offset for %d, %d = %d" % (row, column, row*6+column)
Ok I figured it out. I needed to set one of my windows as Toplevel() instead. That enables me to use StringVar in both places. So something like
window=Tkinter.tk()
FractalWindow=Tkinter.Toplevel()
should do the job.
My function isn't giving me the right output, and it doesn't want to work. I keep getting this error:
TypeError: list indices must be integers, not str
This is my code:
def showShop(level = level, cash = cash):
top = Tkinter.Tk()
shop = ["$100 & level 2 - Shotgun", "$250 & level 3 - 5 Grenades", "$500 & level 5 - Rocket Launcher"]
buttons = []
for i in shop:
temp = shop[i]
temp = Tkinter.Button(top, height=10, width=100, text = temp, command = shopping(i))
temp.pack()
buttons.append(temp)
top.mainloop()
I want it to display what is in the shop list based on what button it is...
Remove temp = shop[i] from the code
for i in shop:
temp = Tkinter.Button(top, height=10, width=100, text = temp, command = shopping(i))
temp.pack()
buttons.append(temp)
The for loop iterates over the elements in the list and not the indices!. The python docs make it more clear
The for statement in Python differs a bit from what you may be used to in C or Pascal. Rather than always iterating over an arithmetic progression of numbers (like in Pascal), or giving the user the ability to define both the iteration step and halting condition (as C), Python’s for statement iterates over the items of any sequence (a list or a string), in the order that they appear in the sequence.
Also note that the command argument in the Button constructor takes a function as an argument. So you maybe better off by writing command = shopping there instead of the call command = shopping(i).
Change for i in shop to for i in xrange(shop).
You have to use something like partial to pass arguments to the function called by the button press. Note that you have declared the variable "temp" as 2 different things. The only reason it works is because the second declaration is after you use the first. Also note that the "buttons" list can not be used outside of the function showShop() because it is created in/local to that function. The following is working code based on what you posted. Also, please do not use "i", "l" or "O" as single digit variable names as they can look like numbers.
import Tkinter
from functools import partial
def shopping(btn_num):
print "button number %d pressed" % (btn_num)
buttons[btn_num]["bg"]="lightblue"
def showShop(buttons):
top = Tkinter.Tk()
shop = ["$100 & level 2 - Shotgun", "$250 & level 3 - 5 Grenades",
"$500 & level 5 - Rocket Launcher"]
##buttons = []
for ctr in range(len(shop)):
temp = Tkinter.Button(top, height=10, width=100, text = shop[ctr],
command = partial(shopping, ctr))
temp.pack()
buttons.append(temp)
top.mainloop()
## lists are mutable
buttons=[] ## not local to the function
showShop(buttons)