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#!/usr/bin/env python
# -*- coding: utf-8 -*-

import math
try:
    # Tkinter for Python 2.xx
    import Tkinter as tk
except ImportError:
    # Tkinter for Python 3.xx
    import tkinter as tk
from PIL import Image, ImageDraw, ImageFont, ImageTk

APP_TITLE = "Save Canvas Image"
APP_XPOS = 100
APP_YPOS = 100
APP_WIDTH = 500
APP_HEIGHT = 400

GRAPH_TITLE = "sin(x)=blue  cos(x)=red"
GRAPH_WIDTH = 400
GRAPH_HEIGHT = 300
GRAPH_TITLE_FONT = ImageFont.truetype("arial.ttf", 18)
GRAPH_FILE_NAME = "My_Graph.jpg"

WHITE = (255, 255, 255)
BLACK = (0, 0, 0)
BLUE = (0, 0, 255)
RED = (255, 0, 0)

CENTER_Y = GRAPH_HEIGHT / 2
INCREMENT_X = 1
FACTOR_X = 0.04
AMPLITUDE = 80


class MyGraph(tk.Frame):

    def __init__(self, app_win, width, height, **kwargs):
        self.app_win = app_win
        self.width = width
        self.height = height
        
        tk.Frame.__init__(self, app_win, **kwargs)
        
        self.build()
        
    def build(self):
        self.draw_frame = tk.Label(self)
        self.draw_frame.pack(fill='both', expand=True)

        self.graph_plane = Image.new("RGB", (self.width, self.height), WHITE)
        self.drawing = ImageDraw.Draw(self.graph_plane)
        
        self.calculate()
        
        self.label_image = ImageTk.PhotoImage(self.graph_plane)
        self.draw_frame['image'] = self.label_image
        
    def calculate(self):
        sine_values = list()
        for x in range(400):
            x_coords = x * INCREMENT_X
            y_coords = int(math.sin(x * FACTOR_X) * AMPLITUDE) + CENTER_Y
            sine_values.append((x_coords, y_coords))
            
        cos_values = list()
        for x in range(400):
            x_coords = x * INCREMENT_X
            y_coords = int(math.cos(x * FACTOR_X) * AMPLITUDE) + CENTER_Y
            cos_values.append((x_coords, y_coords))
            
        self.draw_graph(sine_values, cos_values)
        self.graph_plane.save(GRAPH_FILE_NAME)

    def draw_graph(self, sin_values, cos_values):
        self.drawing.line(sin_values, fill=BLUE)
        self.drawing.line(cos_values, fill=RED)
        self.drawing.text(
            (10, 20), GRAPH_TITLE, fill=BLACK,font=GRAPH_TITLE_FONT)
 
       
def main():
    app_win = tk.Tk()
    app_win.title(APP_TITLE)
    app_win.geometry("+{}+{}".format(APP_XPOS, APP_YPOS))
    app_win.geometry("{}x{}".format(APP_WIDTH, APP_HEIGHT))
    
    app = MyGraph(app_win, GRAPH_WIDTH, GRAPH_HEIGHT
        ).pack(fill='both', expand=True)
    
    app_win.mainloop()
 
 
if __name__ == '__main__':
    main()

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def safe(self)
    ps = self.canvas.postscript(colormode='color')
    img = Image.open(io.BytesIO(ps.encode('utf-8')))
    img.save(path+'test.jpg')

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fontPath = "/usr/share/fonts/dejavu-lgc/DejaVuLGCSansCondensed-Bold.ttf"
sans16 = ImageFont.truetype ( fontPath, 16

Code: Alles auswählen

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import tkinter as tk
from PIL import Image, ImageDraw, ImageFont, ImageTk

APP_TITLE = "Save Canvas Image"
APP_XPOS = 100
APP_YPOS = 100
APP_WIDTH = 500
APP_HEIGHT = 400


class MyGraph(tk.Frame):

    def __init__(self, app_win, **kwargs):
        self.app_win = app_win
        
        tk.Frame.__init__(self, app_win, **kwargs)
                
def main():
    app_win = tk.Tk()
    app_win.title(APP_TITLE)
    app_win.geometry("+{}+{}".format(APP_XPOS, APP_YPOS))
    app_win.geometry("{}x{}".format(APP_WIDTH, APP_HEIGHT))
    
    app = MyGraph(app_win, bg='yellow').pack(fill='both', expand=True)
    
    app_win.mainloop()
 
 
if __name__ == '__main__':
    main()      

Code: Alles auswählen

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import tkinter as tk
from PIL import Image, ImageDraw, ImageFont, ImageTk

APP_TITLE = "Save Canvas Image"
APP_XPOS = 100
APP_YPOS = 100
APP_WIDTH = 500
APP_HEIGHT = 400

WHITE = (255, 255, 255)

class MyGraph(tk.Frame):

    def __init__(self, app_win, **kwargs):
        self.app_win = app_win
        
        tk.Frame.__init__(self, app_win, **kwargs)

        self.graph_plane = Image.new("RGB", (200, 200), WHITE)
        self.drawing = ImageDraw.Draw(self.graph_plane)
        self.label_image = ImageTk.PhotoImage(self.graph_plane)

        self.draw_frame = tk.Label(self, image=self.label_image)
        self.draw_frame.pack(expand=True)
                
def main():
    app_win = tk.Tk()
    app_win.title(APP_TITLE)
    app_win.geometry("+{}+{}".format(APP_XPOS, APP_YPOS))
    app_win.geometry("{}x{}".format(APP_WIDTH, APP_HEIGHT))
    
    app = MyGraph(app_win, bg='steelblue').pack(fill='both', expand=True)
    
    app_win.mainloop()
 
 
if __name__ == '__main__':
    main()