I need to have a button which clears selected check boxes. Please anyone guide me. Thanks in advance.
import Tkinter
from Tkinter import*
top = Tkinter.Tk()
CheckVar1=IntVar()
CheckVar2=IntVar()
C1=Checkbutton(top, text = "Music", variable = CheckVar1,
onvalue = 1, offvalue = 0, height=5,
width = 20,activebackground="red",bg="green")
C2=Checkbutton(top, text = "Video", variable = CheckVar2,
onvalue = 1, offvalue = 0, height=5,
width = 20)
C1.pack()
C2.pack()
B = Tkinter.Button(top, text ="Hello",activebackground="red",
,bd=3,bg="green",width=5) #Button
B.pack()
top.mainloop()
Create a function that will set the value of CheckVar1 and CheckVar2 to 0.
def clear():
CheckVar1.set(0)
CheckVar2.set(0)
And then just link it with the button.
B = Tkinter.Button(top, text ="Hello",activebackground="red",
bd=3,bg="green",width=5, command = clear) #Button
BTW, you had an extra comma here.
Related
Here is my script
# Python 2.7.14 version
from Tkinter import *
import Tkinter
import tkMessageBox
from urllib2 import urlopen
import PIL
from PIL import ImageTk
import ImageTk
FILENAME = 'Fleur_de_lys.jpg'
root = Tk()
background = Canvas(root, width=250, height=250)##AttributeError: class Tk has no attribute 'Canvas'
canvas.pack()
tk_img = ImageTk.PhotoImage( file = FILENAME)
canvas.create_image(125, 125, image=tk_img)
quit_button = tk.Button(root, text = "Quit", command = root.quit, anchor = 'w',
width = 10, activebackground = "#33B5E5")
quit_button_window = canvas.create_window(10, 10, anchor='nw', window=quit_button)
root.mainloop()
No matter what attempt I do I keep getting AttributeError: class Tk has no attribute 'Canvas' where is my error if I just create button I have no issue what so ever all work but when I attempt to have a background image everything does not work
The problem appears to be that you're creating a canvas, and storing it in a variable named background, yet the very next line you are trying to call something called 'canvas', which you've never created.
Change this:
background = Canvas(root, width=250, height=250)
canvas.pack()
...
canvas.create_image(125, 125, image=tk_img)
to this:
background = Canvas(root, width=250, height=250)
background.pack()
...
background.create_image(125, 125, image=tk_img)
I fixed the issue jpg image was not being accepted I made it with a gif. Also found how to correct the buttons location and posn.
Here is the example without all the program
canvas = Canvas(root, width = 500, height = 500, bg='black')
canvas.pack(expand=YES, fill=BOTH)
my_image = PhotoImage(file='C:\\MOTD\\fleur_de_lys.gif')
canvas.create_image(0, 0, anchor = NW, image=my_image)
b1 = Button(root, text="From the Commander", command=callback,anchor = 'w',
width = 18, activebackground = "#33B5E5")
button_window1 = canvas.create_window(10, 10, anchor='nw', window=b1)
Is there a way to get the cell size and x,y location of a cell's corner?I have radio buttons on the left side of my frame and I would like to resize an image based on the size of the frame.
What I'm going to end up doing is creating a block that takes up a large group of cells that will allow me to zoom in on my .tif and scroll left/right and up/down. Does this type of widget already exist?
Here's a very rough outline of what I currently have
from tkinter import *
from PIL import Image,ImageTk
import os
file_path = "C:/Users/..."
dirs = os.listdir(file_path)
root = Tk()
# Set window size slightly below screen size
width = int(root.winfo_screenwidth() - root.winfo_screenwidth()/9)
height = int(root.winfo_screenheight() - root.winfo_screenheight()/9)
root.geometry(str(width)+"x"+str(height))
class Application(Frame):
def __init__(self,master):
Frame.__init__(self,master)
os.chdir(file_path)
self.grid()
self.create_widgets()
def create_widgets(self):
Label(self,
text = "Available Files"
).grid(row=0,column=0,sticky=W)
Label(self,
text = "Select one:"
).grid(row=1,column=0,sticky=W)
self.filelist = StringVar()
self.filelist.set(0)
# Radio buttons of files in directory
i = 1
for files in dirs:
if os.path.isfile(os.path.join(file_path, files)):
i += 1
Radiobutton(self,
text=files,
variable=self.filelist,
value=files,
command=self.update_text
).grid(row=i,column=0,sticky=W)
# Message box
self.result = Text(self, width=40, height=5, wrap=WORD)
self.result.grid(row=i, column=0, columnspan=3)
def update_text(self):
message = "File selected is "
message += self.filelist.get()
self.display_image()
self.result.delete(0.0, END)
self.result.insert(0.0, message)
def display_image(self):
try:
self.image = Image.open(self.filelist.get())
except:
message += self.filelist.get() + " doesn't exist. This is awkward..."
img_width,img_height = self.image.size
self.preview_image = ImageTk.PhotoImage(self.image)
self.preview = Label(self, image=self.preview_image)
self.preview.grid(row=0, column=3, rowspan=20)
app = Application(root)
root.mainloop()
I want to know how to display the values using Entry? i mean for instance if i have a function like:
def open():
path=tkFileDialog.askopenfilename(filetypes=[("Image File",'.jpg')])
blue, green, red = cv2.split(path)
total = path.size
B = sum(blue) / total
G = sum(green) / total
R = sum(red) / total
B_mean1.append(B)
G_mean1.append(G)
R_mean1.append(R)
blue.set(B_mean1)
green.set(G_mean1)
red.set(R_mean1)
root = Tk()
blue_label = Label(app,text = 'Blue Mean')
blue_label.place(x = 850,y = 140)
blue = IntVar(None)
blue_text = Entry(app,textvariable = blue)
blue_text.place(x = 1000,y = 140)
green_label = Label(app,text = 'Green Mean')
green_label.place(x = 850,y = 170)
green = IntVar(None)
green_text = Entry(app,textvariable = green)
green_text.place(x = 1000,y = 170)
red_label = Label(app,text = 'Red Mean')
red_label.place(x = 850,y = 200)
red = IntVar(None)
red_text = Entry(app,textvariable = red)
red_text.place(x = 1000,y = 200)
button = Button(app, text='Select an Image',command = open)
button.pack(padx = 1, pady = 1,anchor='ne')
button.place( x = 650, y = 60)
root.mainloop()
I have specified all the necessary imports and list variables. Still the value is not being displayed in the Entry field.
like if i get the value as :
blue mean = 37,
green mean = 36,
red mean = 41
and it will print in the console but not in the window. How can I achieve this?
Any suggestions are welcome!
Thanks for your supports!
Firstly I want to recommend that instead of using the place method you use the grid method. It is a lot faster and allows you to do things in a much more orderly fashion - especially in this application. Note that there are other geometry managers - like pack - which are good in yet other instances. Anyways, your GUI:
root = Tk()
blue_label = Label(root, text="Blue mean:")
blue_label.grid(row=1, column=1, sticky="w")
blue_entry = Entry(root)
blue_entry.grid(row=1, column=2)
green_label = Label(root, text="Green mean:")
green_label.grid(row=2, column=1, sticky="w")
green_entry = Entry(root)
green_entry.grid(row=2, column=2)
red_label = Label(root, text="Red mean:")
red_label.grid(row=3, column=1, sticky="w")
red_entry = Entry(root)
red_entry.grid(row=3, column=2)
root.mainloop()
That makes your GUI display nicely and without the manual geometry. Note that sticky just sets how the text is justified ("w" means west, and so the text justifies left).
Now, for actually displaying the text, all you have to do is:
blue_entry.insert(0, "blue-mean-value")
green_entry.insert(0, "green-mean-value")
red_entry.insert(0, "red-mean-value")
And if you are overwriting any text that is already there just do:
blue_entry.delete(0, END) # And green_entry and red_entry
I am new to Python and even newer to Tkinter.
I am currently practicing how to use Frames and Labels and
the problem I am encountering is, when I put Labels on a frame with some buttons next to each label,
the alignment is not good to look at.
Here is the code:
from Tkinter import *
class GUI():
def __init__(self):
self.namelist = ["Mark","Anna","Jason","Lenna","Leo","Zucharich","Robinson","AReallyLongNameThatMightExist"]
self.canvas = Canvas(width=1200,height=700)
self.canvas.pack(expand=YES,fill=BOTH)
def Friends(self):
controlframe = Frame(self.canvas)
controlframe.place(x=600,y=300)
#Frame for showing names of friends
for x in self.namelist:
frame = Frame(controlframe)
frame.pack()
Name = Label(frame,text="%s "%x).pack(side=LEFT)
chatButton = Button(frame,text="Chat").pack(side=LEFT)
delButton = Button(frame,text="Delete").pack(side=LEFT)
setcloseButton = Button(frame,text="Set Close").pack(side=LEFT)
setgroupButton = Button(frame,text="Set Group").pack(side=LEFT)
mainloop()
GUI = GUI()
GUI.Friends()
What should I do so that the alignment of the Label(=name) and the button is equal to the other ones so that they will form a shape of a rectangle and not some zigzag?
It is almost always better in Tk to use the grid geometry manager. It is much more flexible once you come to understand how it works. Converting your example to use grid solves your problem as shown below but you should experiment with it a bit. Try removing the 'sticky="W"' from the label for instance and see that the centering of the widgets within the row or column can be controlled. To get your frame responding to resizes sensibly you should investigate the columnconfigure and rowconfigure options for the grid geometry management as well.
from Tkinter import *
class GUI():
def __init__(self):
self.namelist = ["Mark","Anna","Jason","Lenna",
"Leo","Zucharich","Robinson",
"AReallyLongNameThatMightExist"]
self.canvas = Canvas(width=1200,height=700)
self.canvas.pack(expand=YES,fill=BOTH)
def Friends(self):
frame = Frame(self.canvas)
frame.place(x=600,y=300)
#Frame for showing names of friends
row = 0
for x in self.namelist:
label = Label(frame,text="%s "%x)
chatButton = Button(frame,text="Chat")
delButton = Button(frame,text="Delete")
setcloseButton = Button(frame,text="Set Close")
setgroupButton = Button(frame,text="Set Group")
label.grid(row=row, column=0, sticky="W")
chatButton.grid(row=row, column=1)
delButton.grid(row=row, column=2)
setcloseButton.grid(row=row, column=3)
setgroupButton.grid(row=row, column=4)
row = row + 1
mainloop()
GUI = GUI()
GUI.Friends()
I want to center the text of my QTextEdit horizontally and vertically.
I tried this, but it didn't work.
m_myTextEdit = new QTextEdit("text edit", m_ui->centralWidget);
m_myTextEdit->setGeometry(5, 50, 400, 250);
m_myTextEdit->setReadOnly(true);
m_myTextEdit->setAlignment(Qt::AlignCenter);
Is there a opportunity to set it centered with a StyleSheet?
If you only need one line, you can use a QLineEdit instead:
QLineEdit* lineEdit = new QLineEdit("centered text");
lineEdit->setAlignment(Qt::AlignCenter);
If you only want to display the text, not allow the user to edit it, you can use a QLabel instead. This works with line wrapping, too:
QLabel* label = new QLabel("centered text");
lineEdit->setWordWrap(true);
lineEdit->setAlignment(Qt::AlignCenter);
Here is code from PySide that I use for this, for those that need to use QTextEdit rather than QLineEdit. It is based on my answer here:
https://stackoverflow.com/a/34569735/1886357
Here is the code, but the explanation is at the link:
import sys
from PySide import QtGui, QtCore
class TextLineEdit(QtGui.QTextEdit):
topMarginCorrection = -4 #not sure why needed
returnPressed = QtCore.Signal()
def __init__(self, fontSize = 10, verticalMargin = 2, parent = None):
QtGui.QTextEdit.__init__(self, parent)
self.setAttribute(QtCore.Qt.WA_DeleteOnClose)
self.setLineWrapMode(QtGui.QTextEdit.NoWrap)
self.setVerticalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOff)
self.setHorizontalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOff)
self.setFontPointSize(fontSize)
self.setViewportMargins(0, self.topMarginCorrection , 0, 0) #left, top, right, bottom
#Set up document with appropriate margins and font
document = QtGui.QTextDocument()
currentFont = self.currentFont()
currentFont.setPointSize(fontSize)
document.setDefaultFont(currentFont)
document.setDocumentMargin(verticalMargin)
self.setFixedHeight(document.size().height())
self.setDocument(document)
def keyPressEvent(self, event):
'''stops retun from returning newline'''
if event.key() in (QtCore.Qt.Key_Enter, QtCore.Qt.Key_Return):
self.returnPressed.emit()
event.accept()
else:
QtGui.QTextEdit.keyPressEvent(self, event)
def main():
app = QtGui.QApplication(sys.argv)
myLine = TextLineEdit(fontSize = 15, verticalMargin = 8)
myLine.show()
sys.exit(app.exec_())
if __name__ == "__main__":
main()