在画布上滚动的Tkinter鼠标滚轮操作

Exception in Tkinter callback Traceback (most recent call last): File "C:\Users\twaku\Anaconda3\lib\tkinter\__init__.py", line 1699, in __call__ return self.func(*args) File "C:/Users/twaku/PycharmProjects/DCSui/FileToSubmit.py", line 152, in _on_mousewheel self.canvas.yview_scroll(int(-1 * (event.delta / 120), "units")) TypeError: 'str' object cannot be interpreted as an integer

from tkinter import * import tkinter as tk import time import xlrd root = Tk() root.state('zoomed') # full screen -windowed # ------------------INTRODUCTION BLOCK-------------- f1 = Frame(root, width=900, height=700, relief=SUNKEN) f1.grid_rowconfigure(1, weight=1) f1.grid_columnconfigure(2, weight=1) f1.pack(fill=BOTH, expand=1, side=BOTTOM) root.title("Diagram Scroll Test") Tops = Frame(root, width=1600, height=50, relief=SUNKEN) Tops.pack(side=TOP) # ------------------TIME-------------- localtime = time.asctime(time.localtime(time.time())) # -----------------INFO TOP------------ lblinfo = Label(Tops, font=('aria', 30, 'bold'), text="My Diagram Scroll Test", fg="steel blue", bd=10, anchor='w') lblinfo.grid(row=0, column=0) lblinfo = Label(Tops, font=('aria', 20,), text=localtime, fg="steel blue", anchor=W) lblinfo.grid(row=1, column=0) lblinfo = Label(Tops, font=('aria', 15, 'bold'), text="Please help", fg="steel blue", bd=10, anchor='w') lblinfo.grid(row=2, column=0) # ------------------CANVAS DEFINITION------------- class CanvasDemo(Frame): def __init__(self,root): Frame.__init__(self,root) self.canvas = tk.Canvas(root, borderwidth=0) self.canvas.bind_all("<MouseWheel>", self._on_mousewheel) self.frame = tk.Frame(self.canvas) self.vsb = tk.Scrollbar(root, orient="vertical", command=self.canvas.yview) self.canvas.configure(yscrollcommand=self.vsb.set) root.state('zoomed') self.vsb.pack(side="right", fill="y") self.canvas.config(width=root.winfo_screenwidth(), height=root.winfo_screenheight()) # self.canvas.pack(side="left", fill="both", expand="1") self.canvas.pack(fill="both", expand="1") self.canvas.create_window((4, 4), window=self.frame, anchor="nw", tags="self.frame") self.frame.bind("<Configure>", self.onFrameConfigure) self.populate() # ------------------CODE TO CREATE BLOCK DIAGRAMS------------- def populate(self): i = 0 turnCount = 0 # Keeps track of how many boxes is used to trigger a turn # Create Small starter box lineVarx1 = 70 lineVary1 = 50 lineVarx2 = 120 lineVary2 = 50 varx1 = 120 vary1 = 25 varx2 = 220 vary2 = 75 varblk = 1 varline = 1 self.canvas.create_rectangle(20, 40, 70, 60, fill="green", tags="start") while i < 200: # Provides 104 blocks # ------------------IF STATEMENT TO CONTROL WHEN DIAGRAM TURNS------------- if turnCount == 12: # At Turn Point, initiating turn sequence lineVarx2 = lineVarx2 - 25 self.canvas.create_line(lineVarx1, lineVary1, lineVarx2, lineVary2, arrow="last", tags="to_r1") # Downward line lineVarx1 = lineVarx2 lineVary1 = lineVary2 lineVary2 = lineVary2 + 50 self.canvas.create_line(lineVarx1, lineVary1, lineVarx2, lineVary2, arrow="last", tags="to_r1") # long line to left lineVarx1 = lineVarx2 lineVary1 = lineVary2 lineVarx2 = lineVarx2 - 1825 self.canvas.create_line(lineVarx1, lineVary1, lineVarx2, lineVary2, arrow="last", tags="to_r1") # Downward line lineVarx1 = lineVarx2 lineVary1 = lineVary2 lineVary2 = lineVary2 + 50 self.canvas.create_line(lineVarx1, lineVary1, lineVarx2, lineVary2, arrow="last", tags="to_r1") lineVary1 = lineVary2 lineVarx2 = lineVarx2 + 50 varx1 = lineVarx2 vary1 = lineVary2 - 25 varx2 = lineVarx2 + 100 vary2 = lineVary2 + 25 turnCount = 0 self.canvas.create_line(lineVarx1, lineVary1, lineVarx2, lineVary2, arrow="last", tags="to_r1") self.canvas.create_rectangle(varx1, vary1, varx2, vary2, fill="bisque", tags="r1") self.canvas.create_text(varx1 + 20, vary1, fill="darkblue", anchor=NW, text="Hi") self.canvas.create_text(varx1 + 20, vary1 + 10, fill="darkblue", anchor=NW, text="bye") self.canvas.create_text(varx1 + 20, vary1 + 20, fill="darkblue", anchor=NW, text="fly") lineVarx1 = lineVarx1 + 150 lineVarx2 = lineVarx2 + 150 varx1 = varx1 + 150 varx2 = varx2 + 150 i += 1 turnCount += 1 # "End" Block lineVarx1 = varx2 - 150 lineVarx2 = lineVarx1 + 50 varx1 = lineVarx2 vary1 = lineVary1 - 10 varx2 = varx1 + 50 vary2 = lineVary1 + 10 self.canvas.create_line(lineVarx1, lineVary1, lineVarx2, lineVary2, arrow="last", tags="to_r1") self.canvas.create_rectangle(varx1, vary1, varx2, vary2, fill="red", tags="r1") def _on_mousewheel(self, event): self.canvas.yview_scroll(-1 * (event.delta / 120), "units") def onFrameConfigure(self, event): '''Reset the scroll region to encompass the inner frame''' self.canvas.configure(scrollregion=self.canvas.bbox("all")) def qexit(): root.destroy() btnexit = Button(f1, padx=16, pady=7, bd=10, fg="black", font=('ariel', 12, 'bold'), width=8, text="EXIT", bg="powder blue", command=qexit) btnexit.grid(row=15, column=2) canvas = CanvasDemo(root) canvas.pack() mainloop()

1条回答

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1楼 · 发布于 2024-05-23 14:39:21

当你除以结果是一个浮点数。请尝试使用整数除法：

def _on_mousewheel(self, event):
    self.canvas.yview_scroll(-1 * (event.delta // 120), "units")
                                        here: ^

现在，您可能需要检查鼠标指针悬停在哪个窗口小部件上，因为当鼠标指针悬停在滚动条上时，_on_mousewheel()函数会被调用，使其滚动速度提高两倍。在

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