import tkinter as tk import tkinter.ttk as ttk class Controller(object): def __init__(self, app): self.app = app self.selected = None self.selected_start = None self.selected_end = None def run_process(self): print("Run") self.app.main_canvas.bind('<1>', self.make_circle) self.app.main_canvas.bind('<3>', self.select_item) self.app.main_canvas.bind('', self.select_for_line) return 0 def make_circle(self, event): x = event.x y = event.y r = 20 self.app.main_canvas.create_oval(x-r, y-r, x+r, y+r, fill="white", outline="black", tag="circle") def select_item(self, event): self.app.main_canvas.bind('', self.move_item) self.app.main_canvas.bind('<1>', self.deselect_item) self.app.main_canvas.addtag_withtag('selected', tk.CURRENT) def deselect_item(self, event): self.app.main_canvas.dtag('selected') self.app.main_canvas.unbind('') self.app.main_canvas.bind('<1>', self.make_circle) def move_item(self, event): x = event.x y = event.y r = 20 self.app.main_canvas.coords("selected",x-r, y-r, x+r, y+r) def select_for_line(self, event): pass class Application(tk.Tk): def __init__(self): super().__init__() self.con = Controller(self) self.create_control_variables() self.create_widgets() def create_control_variables(self): pass def create_widgets(self): self.main_canvas = tk.Canvas(master=self, width=500, height=400, background='gray75') self.main_canvas.grid(row=0, column=0) self.b = ttk.Button(master=self, text="Start", command=self.con.run_process) self.b.grid(row=1, column=0) # -------------------------- # Execution # -------------------------- if __name__ == "__main__": app = Application() app.mainloop()