GUI TKINTER

Canvas

It is a rectangular Component used for drawing and painting operations.

Constructor
Canvas(master,**options)	Constructor

Options
bd	Border width in pixels. Default is 2.
bg	Background color.
cursor	Cursor used in the canvas like arrow, circle, dot etc
height ,width	Size of the canvas.

Methods:
create_rectangle(args[x1,y1,x2,y2],*kw[width,fill,outline])	Create rectangle with coordinates x1,y1,x2,y2.
create_oval(args[x1,y1,x2,y2],*kw[width,fill,outline])	Create oval with coordinates x1,y1,x2,y2.
create_polygon(args[x1,y1,x2,y2,….xn,yn],*kw[width,fill,outline])	Create polygon with coordinates x1,y1,...,xn,yn.
create_arc(args[x1,y1,x2,y2], *kw[start,extent,width,fill,outline])	Create arc shaped region with coordinates x1,y1,x2,y2.
create_line( args[x1,y1,x2,y2,….xn,yn], *kw[fill,width])	Create line with coordinates x1,y1,...,xn,yn.
create_text(args[x,y],*kw[text,fill,font])	Create text with coordinates x1,y1. Font can be specified by using font="arial 15 bold"
create_image(x , y , anchor=pos, image=imgObj)	To display image.

Colors

You can use a string specifying the proportion of red, green, and blue in hexadecimal digits:

#rgb Four bits per color
#rrggbb Eight bits per color
#rrrgggbbb Twelve bits per color
For example, '#fff' is white, '#000000' is black, '#000fff000' is pure green, and '#00ffff' is pure cyan (green plus blue).
You can directly use color names such as 'white', 'black', 'red', 'green', 'blue', 'cyan', 'yellow', and 'magenta‘ etc

#Example

from tkinter import *
class MyFrame(Tk):
  def __init__(self):
    super().__init__()
    self.can=Canvas(self,width=200,height=200,bg="white")
    self.can.pack(padx=10,pady=10)
    self.can.create_oval([0,0,200,200],fill="orange",outline
                        ="red",width=5)
frm=MyFrame()
frm.mainloop()

#Design a canvas of size 400 X 400 containing 4 squares.

from tkinter import *
class MyFrame(Tk):
  def __init__(self):
    super().__init__()
    self.can=Canvas(self,width=400,height=400,bg="white")
    self.can.pack()
    self.can.create_rectangle([10,10,190,190],fill="red")
    self.can.create_rectangle([210,10,390,190],fill= "yellow") 
    self.can.create_rectangle([10,210,190,390],fill="green")
    self.can.create_rectangle([210,210,390,390],fill="blue")
frm=MyFrame()
frm.mainloop()

#Example

from tkinter import *
class MyFrame(Tk):
  def __init__(self):
    super().__init__()
    self.can=Canvas(self,width=200,height=200,bg="white")
    self.can.pack()
    for i in range(0,100,10):
      x1=i
      y1=i
      x2=200-i
      y2=200-i
      self.can.create_oval([x1,y1,x2,y2])
frm=MyFrame()
frm.mainloop()

#Example

from tkinter import *
class MyFrame(Tk):
  def __init__(self):
    super().__init__()
    self.can=Canvas(self,width=200,height=200,bg="white")
    self.can.pack(padx=10,pady=10)
    j=1
    for i in range(0,100,10):
      x1=i
      y1=i
      x2=200-i
      y2=200-i
      if j%2==0:
        self.can.create_oval([x1,y1,x2,y2],fill="red")
      else:
        self.can.create_oval([x1,y1,x2,y2],fill="blue")
      j+=1
frm=MyFrame()
frm.mainloop()

#Example

from tkinter import *
class MyFrame(Tk):
  def __init__(self):
    super().__init__()
    self.can=Canvas(self,width=400,height=400,bg="white")
    self.can.pack(padx=10,pady=10)
    lst=["red","orange","yellow","green","cyan","blue"]
    for i in range(0,36):
      self.can.create_arc([0,0,400,400],start=i*10,extent=10,
      fill=lst[i%6])
frm=MyFrame()
frm.mainloop()

#Design a Canvas to display bar graph from given sales figures: Amit-200, Gopal-700, Chetan-400, Mohan-300, and Raj-500

from tkinter import *
class MyFrame(Tk):
  def __init__(self):
    super().__init__()
    dlst={"Amit":200,"Gopal":700,"Mohan":300,"Chetan":400,"Raj":500}
    clst=["red","green","orange","blue","yellow","pink","cyan"]
    self.can=Canvas(self,width=max(dlst.values()),height=
    len(dlst)*100,bg="white")
    self.can.pack(padx=10,pady=10)
    i=0
    for nm,sales in dlst.items():
      self.can.create_rectangle([0,i*100,sales,i*100+100],
      fill=clst[i])
      fnt="arial 15 bold"
      self.can.create_text([75,i*100+50],text=nm+":" 
      +str(sales),fnt,fill="white")
      i+=1
frm=MyFrame()
frm.mainloop()

CCITcoder

Introduction to Python

Conditional statements

Iterative statements

Functions

OOPs

Collection

Module and Exception

DateBase

Inherintance

GUI

Introduction to Python

Conditional statements

Iterative statements

Functions

OOPs

Collection

Module and Exception

DateBase

Inherintance

GUI

GUI TKINTER

Canvas

Colors