我正在尝试制作滚动框架类，但是事件对我来说仍然是新事物。
因此，我的框架很好，但是当我尝试使鼠标滚轮发生事件时，出现了一个错误，我错过了给出“ event”自变量的错误。我了解这一点，但我不明白我需要在此处提出哪种类型的论点。
从Google搜索中，我得到了一些答案，但是代码未放置在类中，当我尝试将其放置到类中时，出现错误消息，提示我忘记提供事件参数。
如果使用 lambda 进行设置，我会在某处阅读，它将解决该错误，但是我收到另一个错误，告诉我lambda不接受任何参数，但是给出了一个参数...
如果我得到有关这些事件如何工作的纪录片，我并没有要求解决问题，那将是非常有帮助的。也许有人可以向我解释它如何在类中处理它，因为我发现了有关事件如何工作的一些信息，而只是一些一般性的事情。
我的测试代码在这里：
from tkinter import Tk, Frame, Canvas, Scrollbar, Grid
from tkinter import Label
from tkinter.ttk import Sizegrip
root = Tk()
appWidth = 500
appHeight = 300
appError = "[ ERROR ] >> "
class ASI:
def Extend(master=None, row=0, column=0):
if master != None:
Grid.rowconfigure(master, row, weight=1)
Grid.columnconfigure(master, column, weight=1)
else:
print(f"{appError}You still need to type witch frame to expend!")
class ScrollFrame(Frame):
def __init__(self, master, *args, **kwargs):
#super().__init__(master, *args, **kwargs)
super(ScrollFrame, self).__init__(master, *args, **kwargs)
# Display container
canvas = Canvas(self)
ASI.Extend(canvas)
# Scrollbar for the display container
scrollbarV = Scrollbar(self, orient="vertical", command=canvas.yview)
scrollbarH = Scrollbar(self, orient="horizontal", command=canvas.xview)
resize = Sizegrip(self)
# Frame inside the container
self.frame = Frame(canvas, bg="red")
ASI.Extend(self.frame)
# Configure some settings
# Bind the "frame" to the canvas size
self.frame.bind(
"<Configure>", lambda e: canvas.configure(
scrollregion=canvas.bbox("all")
)
)
# Place the "frame" inside the canvas on top left
canvas.create_window((0,0), window=self.frame, anchor="nw")
# Set scrollbars to the canvas functions
canvas.configure(yscrollcommand=scrollbarV.set)
canvas.configure(xscrollcommand=scrollbarH.set)
# Paking
canvas.grid(row=0, column=0, sticky="nesw")
scrollbarV.grid(row=0, column=1, sticky="ns")
scrollbarH.grid(row=1, column=0, sticky="we")
resize.grid(row=1, column=1)
# Events
def ScrollEvent(self, event):
self.canvas.yview_scroll(init(-1*(event.delta/120)), "units")
def ScrollEvent_Bound(self, event):
self.canvas.bind_all("<MouseWheel>", self.ScrollEvent)
def ScrollEvent_UnBound(self, event):
self.canvas.unbind_all("<MouseWheel>")
canvas.bind("<Enter>", ScrollEvent_Bound)
canvas.bind("<Leave>", ScrollEvent_UnBound)
# This will solve error messages but the event will still not work
#canvas.bind("<Enter>", lambda e:ScrollEvent_Bound)
#canvas.bind("<Leave>", lambda e:ScrollEvent_UnBound)
# This will show me same error like with not lambda
#canvas.bind("<Enter>", lambda e:ScrollEvent_Bound(e))
class App:
def __init__(self, master):
self.master = master
ASI.Extend(master)
# Main App Configurations
master.title("Scroll Frame")
centerW = int((master.winfo_screenwidth() - appWidth) / 2)
centerH = int((master.winfo_screenheight() - appHeight) / 2)
master.geometry(f"{appWidth}x{appHeight}+{centerW}+{centerH}")
# App Content
info = ScrollFrame(master)
info.grid(row=0, column=0, sticky="nesw")
ASI.Extend(info)
for i in range(30):
if i <= 9: row = f"0{i}"
else: row = i
txt = f"Row: {row} // Column: 00"
Label(info.frame, text=txt, bg="pink"
).grid(row=i, column=0)
# Run if this is the main file opened
if __name__ == "__main__":
App(root)
root.mainloop()
Python 3.8.1 // OS：Window （7）
答案 0 :(得分：0)
我在玩在Google上找到的其他示例代码，所以所有问题都是 self 的宽度。我从事件函数中删除了所有自变量，现在一切正常。
更新的代码：
class ScrollFrame(Frame):
def __init__(self, master, *args, **kwargs):
super(ScrollFrame, self).__init__(master, *args, **kwargs)
# Display container
canvas = Canvas(self)
ASI.Extend(canvas)
# Scrollbar for the display container
scrollbarV = Scrollbar(self, orient="vertical", command=canvas.yview)
scrollbarH = Scrollbar(self, orient="horizontal", command=canvas.xview)
# Frame inside the container
self.frame = Frame(canvas)
ASI.Extend(self.frame)
# Configure some settings
# Bind the "frame" to the canvas size
self.frame.bind(
"<Configure>", lambda e: canvas.configure(
scrollregion=canvas.bbox("all")
)
)
# Place the "frame" inside the canvas on top left
canvas.create_window((0,0), window=self.frame, anchor="nw")
# Set scrollbars to the canvas functions
canvas.configure(yscrollcommand=scrollbarV.set)
canvas.configure(xscrollcommand=scrollbarH.set)
# Paking
canvas.grid(row=0, column=0, sticky="nesw")
scrollbarV.grid(row=0, column=1, sticky="ns")
scrollbarH.grid(row=1, column=0, sticky="we")
# Events
def ScrollEventKey(event):
# Arrow Left // Numpad 4
if event.keycode == 37 or event.keycode == 100:
canvas.xview_scroll(-1, "units")
# Arrow Right // Numpad 6
elif event.keycode == 39 or event.keycode == 102:
canvas.xview_scroll(1, "units")
# Arrow Up // Numpad 8
elif event.keycode == 38 or event.keycode == 104:
canvas.yview_scroll(-1, "units")
# Arrow Down // Numpad 2
elif event.keycode == 40 or event.keycode == 98:
canvas.yview_scroll(1, "units")
def ScrollEventV(event):
canvas.yview_scroll(int(-1*(event.delta/120)), "units")
def ScrollEventH(event):
canvas.xview_scroll(int(-1*(event.delta/120)), "units")
def ScrollEvent_Bound(event):
canvas.bind_all("<MouseWheel>", ScrollEventV)
canvas.bind_all("<Shift-MouseWheel>", ScrollEventH)
canvas.bind_all("<KeyPress>", ScrollEventKey)
def ScrollEvent_UnBound(event):
canvas.unbind_all("<MouseWheel>")
canvas.unbind_all("<Shift-MouseWheel>")
canvas.unbind_all("<KeyPress>")
canvas.bind("<Enter>", ScrollEvent_Bound)
canvas.bind("<Leave>", ScrollEvent_UnBound)