def fresh():
t = Toplevel()
t.geometry("%dx%d%+d%+d" % (600, 400, 0, 0))
rad1 = StringVar(t)
opt1 = StringVar(t)
opt1.set("School Board")
opt2 = StringVar(t)
opt2.set("Department")
form = Frame(t)
form.pack()
for (ix, label) in enumerate(fieldnames):
lab = Label(form, text=label)
ent = Entry(form)
lab.grid(row=ix, column=0)
ent.grid(row=ix, column=1)
entries[label] = ent
r1=Radiobutton(form, text="M", variable=rad1, value="M")
r1.grid(row=5,column=0)
r2 = Radiobutton(form, text="F", variable=rad1, value="F")
r2.grid(row=5, column=1)
student.gender = rad1.get()
l = OptionMenu(form, opt1, "CBSE", "State Board","SB-TN","SB-KA","SB-KL","SB-AP","SB-RJ","SB-MH" )
l.grid(row=6, column=1)
student.SB = opt1.get()
l2 = OptionMenu(form, opt2,"AE","CH","CI","CSE","ECE","EEE","EIE","ME" )
l2.grid(row=7, column=1)
student.dept = opt2.get()
The value for radio button remains NULL value.
opt1 and opt2 value is also not getting changed other than default value.
kindly help.
They're changing, you're just not tracing the change. When you're setting them with these lines:
student.gender = rad1.get()
it's only getting set when the control flow passes over them. So, those values are going to be the values on initiation of the code.
You can trace a variable class instance with the trace method. Here's a small example:
root = Tk()
def callback(*args): # function called when var changes
print var.get() # this is where you'd set another variable to var.get()
var = StringVar()
Radiobutton(root, text='M', variable=var, value='M').pack()
Radiobutton(root, text='F', variable=var, value='F').pack()
var.trace('w', callback) # this will call a function when var changes
mainloop()
Alternatively, you can set a command to a callback in the Radiobutton options. Or, if you don't need the values updated in real-time, you could make a button that handles all of the processing of the fields at once.
Related
How can I access an Entry content with pressing the corresponding Button in dynamically created widgets?
Below is the best I come up with so far. Thank you for any help.
from Tkinter import *
class App(object):
def __init__(self, master):
self.master = master
self.mf = Frame(self.master)
self.l = ["white", "red", "blue", "brown"]
self.font = ("Arial", 30)
self.c, self.r = 1, 0
self.cc, self.rr = 0, 0
self.bel = []
for c in self.l:
action = self.print_entry
self.e = Entry(self.mf, bg=c, width=10, font=self.font)
self.e.grid(row=self.r, column=self.c)
self.b = Button(self.mf, bg=c, text=c, font=self.font)
self.b.grid(row=self.rr, column=self.cc)
self.b.config(command=action)
self.bel.append((self.b, self.e))
self.rr += 1
self.r += 1
self.mf.pack()
def print_entry(self): # this function prints the content of the entry
pass
def main():
root = Tk()
display = App(root)
root.mainloop()
if __name__=="__main__":
main()
You can pass a reference to the entry widget into the command, using lambda or functools.partial. For example:
self.b.config(command= lambda entry=self.e: action(entry))
...
def print_entry(self, entry):
print("the entry is '%s'" % entry.get())
By the way, using self.b and self.e is pointless, since those variables will only ever hold references to the last button and last entry. You should either use a local variable, and/or append the values to a list.
I am trying out few things with Tkinter as an exercise.
In my example app i want user to select one option from drop down list. Based on this selection i want to populate the list of radio button. I have created a list of values to populate in dropdown list and a dictionary for radio button. please check the code.
See below some working and not working examples:
As you can see from the picture. The first window works well. Second also. However the third window is not quite correct. The option '410' remains. I am making subsequent selections without closing the application.
I think perhaps i am not declaring the variables at the right place. It would be very helpful if some one can have a look at the code and rectify it.
Code:
from Tkinter import *
import ttk
class App(Frame):
def __init__(self,parent):
Frame.__init__(self)
self.parent = parent
self.v = IntVar()
#self.radio_value = []
#self.i = 0
self.GUI()
def GUI(self):
self.master.title('Example')
self.pack(fill = BOTH, expand = 1)
self.options = ['a1','a2','a3','a4','a5']
self.box_value = StringVar()
self.box = ttk.Combobox( self, textvariable=self.box_value)
self.box.bind("<<ComboboxSelected>>", self.set_Radio)
self.box['values'] = self.options
self.box.current(0)
self.box.grid(row = 0, column = 0 )
self.choices = {'a1':['30', '70', '140', '410'], 'a2': ['a', 'b', 'c'], 'a3': ['x', 'y', 'z'], 'a4':['p', 'q', 'r'], 'a5': ['l', 'm', 'n']}
def set_Radio(self,parent):
i = 0
radio_value = []
if self.box_value.get() in self.choices.keys():
radio_value = self.choices[self.box_value.get()]
print radio_value
for t in radio_value:
i = i+1
b = Radiobutton(self, text=t, variable=self.v, value=t)
b.grid(row = i, column = 0)
def main():
root = Tk()
root.geometry('250x250')
app1= App(root)
root.mainloop()
if __name__ == '__main__':
main()
The problem is that you don't delete the old radiobuttons before creating the new radiobuttons. One solution is to put them in an invisible frame. When you delete the frame, the radiobuttons will automatically be destroyed. Another solution is to keep a reference to them so that you can destroy them individually later.
Here's an example of keeping a reference:
def __init-_(self, parent):
...
self.radios = []
def set_Radio(self,parent):
for widget in self.radios:
widget.destroy()
self.radios = []
...
for t in radio_value:
...
b = Radiobutton(...)
self.radios.append(b)
...
I created a Tkinter window Form, in that based on user selection i dynamically replace the combobox with deleting the Exist one.But the Problem is when i do like this the value selected in combobox is not updated.It is always displaying the default vale. see the following code
from Tkinter import *
import ttk
final=[]
field_0=['1','0']
field_1=['1','2','23','45','6']
field_2=['2','5','7','8','9']
class header:
def __init__(self,root):
self.parent=root
self.row_number= 1
self.value=0
root.title(" Select fields ")
root.minsize(width=450, height=530)
root.maxsize(width=450, height=550)
frame=Frame(root,height=20,relief=FLAT)
frame.grid(row=0,column=0,sticky=W)
Label(frame,text="Enter value:").grid(row=0,column=0,padx=70,pady=5,sticky=W)
entryValue=StringVar()
port_e = Entry(root,width=5,textvariable=entryValue)
port_e.delete(0,END)
port_e.insert(0,'0')
port_e.grid(row=0,column=0,padx=100,pady=5)
self.value=self.value+1
self.change_row=self.row_number
self.combocreate(self.change_row,root,field_0)
self.change_row=self.change_row+1
self.combocreate(self.change_row,root,field_1)
def combocreate(self,row_number,msg_frame,field):
comboBoxValue = [] # 'request'command for sink only
self.box_value=StringVar()
self.combo=ttk.Combobox(root,textvariable=self.box_value,state='readonly')
self.combo['values'] = tuple(field)
self.combo.set(field[1])
self.combo.grid(row = row_number, column = 1)
self.combo.bind("<<ComboboxSelected>>",self.selected_field)
final.append(self.combo)
def selected_field(self,event):
global cnt_sel
print final[0].get()
if(final[0].get()=='1'):
self.control=Label(root,text="Choose one type").grid(row=self.change_row,column=0,padx=20,pady=5,sticky=W)
self.combocreate(self.change_row,root,field_1)
final[1]=final[2] #replacing combobox dynamically based on selection
del final[2]
elif(final[0].get()=='0'):
Label(root,text="Choose zerotype ").grid(row=self.change_row,column=0,padx=20,pady=5,sticky=W)
self.combocreate(self.change_row,root,field_2)
final[1]=final[2]
del final[2]
else:
pass
if __name__=="__main__":
root=Tk()
app=header(root)
root.mainloop()
The problem with your code is that every time combocreate is called, it automatically binds the Combobox to self.selected_field, so whenever you change the value of the type Combobox, you call self.selected_field, and it automatically resets the type to the default. To fix the problem, you should only bind the first Combobox. This should fix the problem:
Replace
self.change_row=self.row_number
self.combocreate(self.change_row,root,field_0)
self.change_row=self.change_row+1
self.combocreate(self.change_row,root,field_1)
With
self.change_row=self.row_number
self.combocreate(self.change_row,root,field_0)
final[0].bind("<<ComboboxSelected>>",self.selected_field)
self.change_row=self.change_row+1
self.combocreate(self.change_row,root,field_1)
And
def combocreate(self,row_number,msg_frame,field):
comboBoxValue = [] # 'request'command for sink only
self.box_value=StringVar()
self.combo=ttk.Combobox(root,textvariable=self.box_value,state='readonly')
self.combo['values'] = tuple(field)
self.combo.set(field[1])
self.combo.grid(row = row_number, column = 1)
self.combo.bind("<<ComboboxSelected>>",self.selected_field)
final.append(self.combo)
With
def combocreate(self,row_number,msg_frame,field):
comboBoxValue = [] # 'request'command for sink only
self.box_value=StringVar()
self.combo=ttk.Combobox(root,textvariable=self.box_value,state='readonly')
self.combo['values'] = tuple(field)
self.combo.set(field[1])
self.combo.grid(row = row_number, column = 1)
final.append(self.combo)
I'm trying to open a second window beside my mainwindow on a button click and display a tablewidget on it with some data. When I open the window it raises
AttributeError: 'Ui_MainWindow' object has no attribute 'openTable'
The mainwindow was created with Qt Designer and converted the ui file with pyuic4. How do I do this correctly correct so that the error is not raised?
The button calls function:
def showCliplist(self):
data = self.metadata_list
luts = self.lutlist
selected_lut = self.LUTBox.currentIndex()
openTable = ClipListViewer(data,luts,selected_lut)
self.openTable.show()
New window class:
class ClipListViewer(QtGui.QWidget):
def __init__(self, data, luts, selected_lut, parent = None):
super(ClipListViewer,self).__init__()
self.setWindowTitle('Cliplist')
self.resize(900,600)
self.metadata = data
self.curentluts = luts
self.choosenlut = selected_lut
y_count = len(self.metadata)
self.table = QtGui.QTableWidget(y_count,6)
self.table.setHorizontalHeaderLabels(['Clip', 'Videocodec', 'FPS', 'Audiocodec', 'Start Timecode', 'LUT'])
x = y = 0
for items in self.metadata:
for entry in items:
#print entry
self.table.setItem(y, x, QtGui.QTableWidgetItem(entry))
self.table.resizeColumnToContents(x)
x += 1
self.comb = QtGui.QComboBox()
for lutname in self.curentluts:
self.comb.addItem(lutname)
self.comb.setCurrentIndex(self.choosenlut)
self.table.setCellWidget(y, 5, self.comb)
self.table.setColumnWidth(5, 230)
y += 1
x = 0
self.table.resizeRowsToContents()
layout = QtGui.QHBoxLayout()
layout.addWidget(self.table)
self.setLayout(layout)
self.show()
def closeEvent(self, event): #check if window was closed
print "Cliplist Window was closed! "
I reviews your code completed, OK, let's me explain.
AttributeError: 'Ui_MainWindow' object has no attribute 'openTable'
This error says, "I not have self.openTable in class Ui_MainWindow (That true because your have create own method)".
Why ? : Because a problem is in line this;
def showCliplist(self):
data = self.metadata_list
luts = self.lutlist
selected_lut = self.LUTBox.currentIndex()
openTable = ClipListViewer(data,luts,selected_lut) # <- (1) THIS LINE
self.openTable.show() # <- (2) THIS LINE
In (1), your create your second widget in to openTable (Not self.openTable).
This line we have this object in openTable (Not self.openTable).
Then (2), your call QtGui.QWidget.show(self) to show widget of self.openTable (Not openTable). It's should be error because we don't have variable self.openTable. To fix it your should use same name variable, Like this;
def showCliplist(self):
data = self.metadata_list
luts = self.lutlist
selected_lut = self.LUTBox.currentIndex()
self.openTable = ClipListViewer(data,luts,selected_lut) # <- FIX THIS LINE !
self.openTable.show() # <- (2) THIS LINE
Why second widget is show before I call self.openTable.show()?
Answer : Your can see in second widget initiate in last line of code your see QtGui.QWidget.show(self) has be call before end of initiate;
class ClipListViewer(QtGui.QWidget):
def __init__(self, data, luts, selected_lut, parent = None):
super(ClipListViewer,self).__init__()
.
.
.
self.show() # <- THIS LINE
Regards,
I am again asking a question on this progressbar project; although this should just be a clarification question.
My code causes for a progressbar to be created to track the creation of a file. The user selects the type of file they want to create and then hits "go" which causes for the file to begin changing and for the progressbar to appear. Progressbar works great. File writing/manipulation works great.
Problem: When the user selects several files to manipulate, despite the progressbars being created correctly, they do NOT update correctly. At first I thought that clicking on a button multiple times causes for tkinter to forget the root.after() function it was doing previously but after playing with a (much simpler) sample code I realized that this is not the case.
Question: How do I make sure tkinter doesn't stop implementing the first function even when the same function is restarted with different parameters?
Below are parts of my code to describe what I am doing.
progbarlock = False # start with the prograssbar marked as not occupied
class guibuild:
def __init__(self):
self.root = root
guibuild.progbarlock = False
global theframe
theframe = Frame(root)
job_name = e.get()
label = Label(theframe,text = job_name).pack(side=LEFT,padx =2)
self.progbar = Meter(theframe) #makes the progressbar object
self.progbar.set(0.0) #sets the initial value to 0
self.progbar.pack(side=LEFT)
self.counter = 0
self.i = float(0) #i is the value set to the progressbar
def stop_progbar(self):
self.progbar.stop()
def begin(self):
self.interval()
self.Status_bar()
theframe.pack(anchor="s")
def interval(self):
if guibuild.progbarlock == False:
guibuild.progbarlock = True
def update(self):
the_file = open('running_file.json')
data = json.load(the_file)
curr = data["current_line"]
total = data["total_lines"]
if self.i == 1.0:
self.stop_progbar
rint "100% - process is done"
self.root.after_cancel(self.interval)
elif curr == self.counter:
self.root.after(5000, self.interval)
elif curr == self.counter+1:
self.i += 1.0/total
self.progbar.set(self.i) #apply the new value of i to the progressbar
self.counter += 1
self.stop_progbar
self.root.after(5000, self.interval)
elif curr > self.counter+1:
self.i += 1.0/total*(curr-self.counter)
self.progbar.set(self.i) #apply the new value of i to the progressbar
self.counter = curr
self.stop_progbar
self.root.after(5000, self.interval)
else:
print "something is wrong - running.json is not available"
self.root.after(5000, self.interval)
guibuild.progbarlock = False
def start_process():
makeRequest() #this is defined much earlier in the code and includes all the file creation and manipulation
guibuild().begin()
button4 = Button(root,text="GO", command = start_process).pack()
NOTE:makeRequest() depends entirely on user input and the user input changes each time "go" is pressed.