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- import tkinter as tk
- import time, math
- from PIL import Image, ImageDraw, ImageTk
- class Graph(tk.Canvas):
- def __init__(self, root, **kwargs):
- self.root = root
- tk.Canvas.__init__(self, root, **kwargs)
- self.height = self.winfo_reqheight()
- self.width = self.winfo_reqwidth()
- self.coord = [(10, 50), (20, 50), (100, 100)]
-
- self.drawBackground()
- self.canvas = self.bg.copy()
- self.image = self.create_image(0, 0, image=None, anchor='nw')
- self.bind("<Configure>", self.on_resize)
- self.scale = 450 / 2
- def drawBackground(self):
- self.bg = Image.new('RGB', (self.width, self.height), (0,20,0))
- draw = ImageDraw.Draw(self.bg)
- draw.line([(0, self.height/2), (self.width, self.height/2)], (0,127,127), 1)
- draw.line([(self.width/2, 0), (self.width/2, self.height)], (0,127,127), 1)
- def on_resize(self,event):
- # determine the ratio of old width/height to new width/height
- self.width = max(400, event.width-4)
- self.height = max(400, event.height-4)
- # resize the canvas
- self.config(width=self.width, height=self.height)
- self.canvas = self.canvas.resize((self.width, self.height))
- self.drawBackground()
- self.canvas = Image.blend(self.canvas, self.bg, 0.1)
- def update(self, data):
- self.coord = [self.coord[-1]]
- for point in data[0]:
- self.coord.append((point[0] / self.scale * self.width/2, point[1] / self.scale * self.height/2))
- self.canvas = Image.blend(self.canvas, self.bg, 1/250)
- draw = ImageDraw.Draw(self.canvas)
- draw.line(self.coord, fill=(100, 255, 100, 255), width=int(self.height/100), joint='curve')
- self.photo = ImageTk.PhotoImage(self.canvas)
- self.itemconfig(self.image, image=self.photo)
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