Tkinter, the standardPythonlibrary for creating graphical user interfaces (GUIs), provides a powerful widget called the Canvas that allows us to draw and manipulate shapes. The Canvas widget inTkinteris an excellent tool for building 2D graphics. Our task is to create various shapes such as ovals, rectangles, arcs, and polygons using the Canvas class.

Canvas Methods for Shapes

Here are some essential methods provided by the Canvas class to create various shapes:

1. Canvas.create_oval(x1, y1, x2, y2, options = ...):Used to create ovals, pie slices, and chords. The parameters (x1, y1) and (x2, y2) define the bounding box of the oval.
2. Canvas.create_rectangle(x1, y1, x2, y2, options = ...):Used to create rectangles and squares. The coordinates (x1, y1) and (x2, y2) define the opposite corners of the rectangle.
3. Canvas.create_arc(x1, y1, x2, y2, options = ...):Used to create arcs. Similar to the rectangle and oval, the coordinates (x1, y1) and (x2, y2) define the bounding box of the arc.
4. Canvas.create_polygon(coordinates, options = ...):Used to create any valid shape defined by a series of points. The coordinates are passed as a list of (x, y) pairs.

Drawing Shapes on the Canvas

This Python code uses Tkinter to create a simple GUI that displays various shapes on a canvas. TheShapeclass defines methods to draw ovals, rectangles, arcs, and polygons using theCanvaswidget. These shapes are customized with different colors and line widths. The canvas is packed into the main window, and the program runs in the Tkinter event loop, allowing the shapes to be displayed interactively.

fromtkinterimport*fromtkinter.ttkimport*classShape:def__init__(self,master=None):self.master=masterself.create()defcreate(self):self.canvas=Canvas(self.master)self.canvas.create_oval(10,10,80,80,outline="black",fill="white",width=2)self.canvas.create_oval(110,10,210,80,outline="red",fill="green",width=2)self.canvas.create_rectangle(230,10,290,60,outline="black",fill="blue",width=2)self.canvas.create_arc(30,200,90,100,start=0,extent=210,outline="green",fill="red",width=2)points=[150,100,200,120,240,180,210,200,150,150,100,200]self.canvas.create_polygon(points,outline="blue",fill="orange",width=2)self.canvas.pack(fill=BOTH,expand=1)if__name__=="__main__":master=Tk()shape=Shape(master)master.title("Shapes")master.geometry("330x220+300+300")mainloop()

Output:  

Explanation:

• TheShapeclass initializes the canvas and draws the shapes using methods likecreate_oval,create_rectangle,create_arc, andcreate_polygon.
• The window size and position are set usinggeometry(), and the layout is managed with thepack() method.
• Themainloop()keeps the application running and interactive.

Similar Reads