python - How to select specific entry widgets for function calls in tkinter using a touch screen? -

i creating touchscreen gui multiple entry widgets edited using keypad. how can know entry widget user selected? i've created roundabout way each entry coded button , when clicked, button edits 'selected' variable keypad uses know edit there better way? possibly using focus? (i have button widgets working want use commented entry widget, irrelevant code has been deleted post wasn't overly long)

class myapp(tk):     def __init__(self,*args, **kwargs):         tk.__init__(self, *args, **kwargs)          container = frame(self)         container.pack(side="top", fill="both", expand = true)          self.shared_data = {             'codeone' : stringvar(),             'codetwo' : stringvar(),              'selectedcode' : stringvar(),         }      def setcode(self, value):         #function updates selected variable         selectedvar = self.shared_data['selectedcode']         if selectedvar.get() == 'codeone':             code = self.shared_data['codeone']         elif selectedvar.get() == 'codetwo':             code = self.shared_data['codetwo']         else: #non selected             print('nothing selected')             return false         old = code.get()         if type(value) == int:             code.set(old+str(value))         else:             code.set(old[0:len(old)-1])         return true      def setvariable(self, variable, value):         variable.set(value)         return true  class menupage(frame):     def __init__(self, parent, controller):         frame.__init__(self, parent)         self.controller = controller          label(self, text="code 1:", font='helvetica 15').grid(row=2, column=0, columnspan=3, sticky=e, pady=10)         button(self, textvariable=controller.shared_data['codeone'], font=menu_entries, width=7, bg='grey99', command=lambda:controller.setvariable(controller.shared_data['selectedcode'],'codeone')).grid(row=2, column=1, pady=10)         #entry(self,  textvariable=controller.shared_data['codeone'], font='helvetica 15').grid(row=2, column=3, columnspan=1, pady=10, sticky=w)          label(self, text="code 2:", font='helvetica 15').grid(row=3, column=0, columnspan=3, sticky=e, pady=10)         button(self, textvariable=controller.shared_data['codetwo'], font=menu_entries, width=7, bg='grey99', command=lambda:controller.setvariable(controller.shared_data['selectedcode'],'codetwo')).grid(row=2, column=1, pady=10)         #entry(self, textvariable=controller.shared_data['codetwo'], font='helvetica 15').grid(row=3, column=3, columnspan=3, pady=10, sticky=w)          button(self, text="1", width=3, command=lambda:controller.setcode(1)).grid(row=1, column=3, rowspan=2, padx=(20,5), pady=10)         button(self, text="2", width=3, command=lambda:controller.setcode(2)).grid(row=1, column=4, rowspan=2, padx=5, pady=10)         button(self, text="3", width=3, command=lambda:controller.setcode(3)).grid(row=1, column=5, rowspan=2, padx=5, pady=10)         button(self, text="4", width=3, command=lambda:controller.setcode(4)).grid(row=3, column=3, rowspan=2, padx=(20,5), pady=10)         button(self, text="5", width=3, command=lambda:controller.setcode(5)).grid(row=3, column=4, rowspan=2, padx=5, pady=10)         button(self, text="6", width=3, command=lambda:controller.setcode(6)).grid(row=3, column=5, rowspan=2, padx=5, pady=10)         button(self, text="7", width=3, command=lambda:controller.setcode(7)).grid(row=5, column=3, rowspan=2, padx=(20,5), pady=10)         button(self, text="8", width=3, command=lambda:controller.setcode(8)).grid(row=5, column=4, rowspan=2, padx=5, pady=10)         button(self, text="9", width=3, command=lambda:controller.setcode(9)).grid(row=5, column=5, rowspan=2, padx=5, pady=10)         button(self, text="delete", width=7, command=lambda:controller.setcode('delete')).grid(row=7, column=3, rowspan=2, columnspan=2, padx=(20,5), pady=10)         button(self, text="0", width=3, command=lambda:controller.setcode(0)).grid(row=7, column=5, rowspan=2, padx=5, pady=10)   app = myapp()  app.mainloop() 

i imagine work same if had traditional mouse , keyboard. when user touches entry widget, widget gets focus. function needs input text widget focus. sort of problem concept of "focus" exists.

delete buttons, put entry widgets back, , change setcode this:

def setcode(self, value):     # widget focus     widget = self.focus_get()      # insert value     widget.insert("insert", value) 

you might want give first entry widget focus. need keep reference (it's best practice separate creation of widget adding window grid, pack or place if don't need reference):

entry = entry(self, textvariable=controller.shared_data['codeone'], width=7, bg='grey99') entry.grid(row=2, column=1, pady=10) entry.focus_set()