Python。返回當前光標位置和位置最後一次鼠標點擊

Question

我希望能夠將最後一次鼠標點擊的光標位置定義爲一個點，並將當前光標位置定義爲實際座標中的一個點。我到目前爲止的代碼有Tkinter導入和Math導入。我已經爲這個部分整理了GUI，但我不知道如何定義這些函數來將它顯示爲我的GUI的標籤。

class PointFrame(Frame): 
    def __init__(self, master): 
     Frame.__init__(self, master) 

     self.LastClick= Label(self, text= "Last Point Clicked:") 
     self.LastClick.pack(side= LEFT) 

     self.CurrentPosition= Label(self, text="Cursor Point:") 
     self.CurrentPosition.pack(side= LEFT) 

需要創建以下功能。

Answer 1

事情是這樣的：

from tkinter import * 

class App(): 
    def __init__(self): 
     root = Tk() 

     self.last_point = (0, 0) 

     self.prev_var = StringVar(value='-:-') 
     self.curr_var = StringVar(value='-:-') 

     labels = Frame(root) 
     labels.pack() 

     Label(labels, text='Last Point Clicked: ').pack(side=LEFT) 
     prev = Label(labels, textvariable=self.prev_var) 
     prev.pack(side=LEFT) 
     Label(labels, text='Current point: ').pack(side=LEFT) 
     curr = Label(labels, textvariable=self.curr_var) 
     curr.pack(side=LEFT) 

     self.canvas = Canvas(root, background='white') 
     self.canvas.pack() 
     self.canvas.bind('<Button-1>', self.on_click) 

     self.canvas.bind('<Motion>', self.on_motion) 
     self.line = self.canvas.create_line(0, 0, 0, 0) 
     self.curr_text = self.canvas.create_text(0, 0) 

     root.mainloop() 
    def on_click(self, event): 
     # Last click in absolute coordinates 
     self.prev_var.set('%s:%s' % self.last_point) 
     # Current point in relative coordinates 
     self.curr_var.set('%s:%s' % (event.x - self.last_point[0], event.y - self.last_point[1])) 
     self.last_point = event.x, event.y 
    def on_motion(self, event): 
     self.canvas.coords(self.line, self.last_point[0], self.last_point[1], event.x, event.y) 
     self.canvas.coords(self.curr_text, event.x, event.y) 
     self.canvas.itemconfigure(self.curr_text, text="%s\n%s\n\n\n" % (event.x - self.last_point[0], event.y - self.last_point[1])) 

App()