Tkinter Grid Overlapping

I am building a calendar that allows the user to cycle through the months and years by pressing the buttons created of the previous month and next month. Essentially what I want th

Solution 1:

This is a modified version of the proposed answer that also includes the original desired intent of allowing the user to cycle through the months and will also increment the year.

from calendar import *
import datetime
try:
    from tkinter import *   # Python 3.x
except:
    from Tkinter import *   # Python 2.x


class Application(Frame):

    def __init__(self, master=None):
        Frame.__init__(self, master)
        self.grid(row=0, column=0, sticky='news')
        DateNow = datetime.datetime.now()
        self.month = int(DateNow.month)
        self.year = int(DateNow.year)
        self.createDaysOfWeekLabels()

        # Create frames and button controls for previous, current and next month.
        self.frameList = []    # List that contains the frame objects.
        self.buttonList = []   # List that contains the button objects.
        self.split()

    def split(self):
        month_name = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']
        leftArrow = Button(self, text="<", command=self.prevMonth)
        leftArrow.grid(row = 0, column = 0)
        rightArrow = Button(self, text=">", command=self.nextMonth)
        rightArrow.grid(row = 0, column = 1)
        for i in range(3):
            try:
                print i, "this is i"
                print self.month
                mFrame = Frame(self)
                self.createMonth(mFrame)
                self.frameList.append(mFrame)
                mButton = Button(self, text=month_name[self.month-1])
                mButton['command'] = lambda f=mFrame, b=mButton: self.showMonth(f, b)
                mButton.grid(row=1, column=i)
                # Grid each frame
                mFrame.grid(row=3, column=0, columnspan=7, sticky='news')
                if (i == 1):
                    mButton['relief'] = 'flat'
                else:
                    mButton.grid_remove()
                    # Remove all but the ith frame. More efficient to remove than forget and configuration is remembered.
                    mFrame.grid_remove()          
                self.buttonList.append(mButton)

            except:
                pass
        # Create year widget at top right of top frame
        label = Label(self, text=self.year)#displaying year
        label.grid(row=0, column=6)
        print "-------------------"

    def prevMonth(self):

        self.month -= 1
        print self.month, "this is month in PREV"
        if self.month <= 0:
            self.month = 12
            print self.month, "month inside forinif in PREVMONTH"
            self.year -= 1
        elif self.month >= 13:
            self.month = 0
            print self.month, "month inside forinelif in PREVMONTH"
            self.year += 1
        self.split()

    def nextMonth(self):

        self.month += 1
        print self.month, "this is month in NEXT"
        for frame in self.frameList:
            frame.grid_remove()

        if self.month <= -1:
            self.month = 11
            print self.month, "month inside forinif in NEXTMONTH"
            self.year -= 1
        elif self.month >= 13:
            self.month = 1
            print self.month, "month inside forinelif in NEXTMONTH"
            self.year += 1
        self.split()


    def createDaysOfWeekLabels(self):
        days = ['Mon','Tue','Wed','Thu','Fri','Sat','Sun']
        for i in range(7):
            label = Label(self, text=days[i], width = 3)
            label.grid(row = 2, column = i)

    def showMonth(self, mFrame, mButton):
        # Display all buttons normally
        for button in self.buttonList:
            button['relief'] = 'raised'

        # Set this month's button relief to flat
        mButton['relief'] = 'flat'

        # Hide all frames
        for mframe in self.frameList:
            mframe.grid_remove()

        mFrame.grid()

    def createMonth(self, mFrame):

        weekday, numDays = monthrange(self.year, self.month)
        week = 0
        for i in range(1, numDays + 1):
            button = Button(mFrame, text = str(i), width=3)
            button.grid(row = week, column = weekday)

            weekday += 1

            if weekday > 6:
                week += 1
                weekday = 0

mainWindow = Tk()
obj = Application(mainWindow)
mainWindow.mainloop()

Solution 2:

Tkinter is fairly efficient. And for the number of widgets that you have, it won't impact performance much to create them all initially. Here is a sample that works about like what you were trying to do.

from calendar import *
import datetime
try:
    from tkinter import *   # Python 3.x
except:
    from Tkinter import *   # Python 2.x


class Application(Frame):

    def __init__(self, master=None):
        Frame.__init__(self, master)
        self.grid(row=0, column=0, sticky='news')

        DateNow = datetime.datetime.now()
        month = int(DateNow.month)
        year = int(DateNow.year)
        self.createDaysOfWeekLabels()
        month_name = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']
        # Create frames and button controls for previous, current and next month.
        self.frameList = []    # List that contains the frame objects.
        self.buttonList = []   # List that contains the button objects.
        amonth = month - 1
        for i in range(3):
            if amonth < 0:
                amonth = 11
                year -= 1
            elif amonth == 12:
                amonth = 0
                year += 1

            mFrame = Frame(self)
            self.createMonth(mFrame, amonth, year)
            self.frameList.append(mFrame)
            mButton = Button(self, text=month_name[amonth-1])
            mButton['command'] = lambda f=mFrame, b=mButton: self.showMonth(f, b)
            mButton.grid(row=0, column=i)
            # Grid each frame
            mFrame.grid(row=2, column=0, columnspan=7, sticky='news')
            if (i == 1):
                mButton['relief'] = 'flat'
            else:
                # Remove all but the ith frame. More efficient to remove than forget and configuration is remembered.
                mFrame.grid_remove()
            self.buttonList.append(mButton)
            amonth += 1

        # Create year widget at top left of top frame
        label = Label(self, text=year)#displaying year
        label.grid(row=0, column=6)


    def createDaysOfWeekLabels(self):
        days = ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']
        for i in range(7):
            label = Label(self, text=days[i])
            label.grid(row = 1, column = i)

    def showMonth(self, mFrame, mButton):
        # Display all buttons normally
        for button in self.buttonList:
            button['relief'] = 'raised'

        # Set this month's button relief to flat
        mButton['relief'] = 'flat'

        # Hide all frames
        for frame in self.frameList:
            frame.grid_remove()

        mFrame.grid()

    def createMonth(self, mFrame, month, year):
        weekday, numDays = monthrange(year, month)
        week = 0
        for i in range(1, numDays + 1):
            button = Button(mFrame, text = str(i), width=3)
            button.grid(row = week, column = weekday)

            weekday += 1

            if weekday > 6:
                week += 1
                weekday = 0

mainWindow = Tk()
obj = Application(mainWindow)
mainWindow.mainloop()