Proof of concept: How to export the content of a Tkinter Canvas to a PDF with ghostscript.

canvas2pdf.py

"""
Setup for Ghostscript:

Download it from http://www.ghostscript.com/ and
add `/path/to/gs9.07/bin/` and `/path/to/gs9.07/lib/` to your path.
"""

import os
import subprocess
import tkinter as tk

class App(object):
    def __init__(self, root):
        self.line_start = None
        self.canvas = tk.Canvas(root, width=300, height=300, bg="white")
        self.canvas.bind("<Button-1>", lambda e: self.draw(e.x, e.y))
        self.button = tk.Button(root, text="Generate PDF", command=self.generate_pdf)
        self.canvas.pack()
        self.button.pack(pady=10)

    def draw(self, x, y):
        if self.line_start:
            x_origin, y_origin = self.line_start
            self.canvas.create_line(x_origin, y_origin, x, y)
            self.line_start = None
        else:
            self.line_start = (x, y)

    def generate_pdf(self):
        self.canvas.postscript(file="tmp.ps", colormode="color")
        process = subprocess.Popen(["ps2pdf", "tmp.ps", "result.pdf"], shell=True)
        process.wait()
        os.remove("tmp.ps")

if __name__ == '__main__':
    root = tk.Tk()
    root.title("Canvas2PDF")
    app = App(root)
    root.mainloop()

I tried this code and received an error "'ps2pdf' is not recognized as an internal or external command, operable program or batch file."

I added the path variables and also installed ghostscript using pip. Still no success.

Looks like the lib directory is not added to the path, run where ps2pdf on the command line to check it.

I want to create with A5 size. Default size is A4. How can I do it?