python tkinter可滚动框架
python tkinter可滚动框架
提问于 2018-10-18 16:06:23
我已经用tkinter制作了一个可滚动的框架，但是有一些东西不起作用。
-Is有没有办法让scrollbar更接近labels呢？
-Is有没有办法让scrollbar从顶部开始而不是从中间开始？
-When我使用bind，当我的鼠标在labels上时，我不能滚动，而当我使用bind_all时，我可以在窗口上的任何地方滚动。有没有办法只在我的鼠标在label上方时才滚动
我的代码：
from tkinter import *
class Example:
def __init__(self, root):
self.master = root
self.init_scrollframe()
def init_scrollframe(self):
self.big_frame = Frame(self.master)
self.big_frame.grid(row=0, column=0)
self.title = Label(self.big_frame, text="TITLE", font=("Arial", 30))
self.title.grid(row=0, column=0, columnspan=2)
self.frame = Frame(self.big_frame)
self.frame.grid(row=1, column=0)
self.scrollb = Scrollbar(self.frame, orient=VERTICAL)
self.scrollb.grid(row=0, column=1, sticky=N+S+W)
self.scroll_canvas = Canvas(self.frame, yscrollcommand=self.scrollb.set)
self.scroll_canvas.grid(row=0, column=0, sticky=N+S+E)
self.scrollb.config(command=self.scroll_canvas.yview)
##this doesn't work
"""self.frame.bind("<MouseWheel>", self._on_mousewheel)
self.frame.bind("<Button-5>", self._on_mousewheel)
self.frame.bind("<Button-4>", self._on_mousewheel)"""
##this works but it is scrolling also when I am not above the labels
self.scroll_canvas.bind_all("<MouseWheel>", self._on_mousewheel)
self.scroll_canvas.bind_all("<Button-5>", self._on_mousewheel)
self.scroll_canvas.bind_all("<Button-4>", self._on_mousewheel)
self.my_frame = Frame(self.scroll_canvas)
##put some labels into the scrollable frame
for i in range(100):
self.lbl = Label(self.my_frame, text=str("label number " + str(i)))
self.lbl.grid(row=i, column=0)
self.scroll_canvas.create_window(0, 0, window=self.my_frame)
self.my_frame.update_idletasks()
self.scroll_canvas.config(scrollregion=self.scroll_canvas.bbox("all"))
##this is for scrolling
def _on_mousewheel(self, event):
if event.num == 5 or event.delta == -120:
self.scroll_canvas.yview_scroll(1, "units")
if event.num == 4 or event.delta == 120:
self.scroll_canvas.yview_scroll(-1, "units")
if __name__ == "__main__":
root = Tk()
ex = Example(root)
root.mainloop()回答 1
Stack Overflow用户
发布于 2018-10-18 16:34:02
对于你的第三个问题，你可以简单地检查事件是否在你的scroll_canvas之前的帧内。
from tkinter import *
class Example:
def __init__(self, root):
self.master = root
self.init_scrollframe()
def init_scrollframe(self):
self.big_frame = Frame(self.master)
self.big_frame.grid(row=0, column=0)
self.title = Label(self.big_frame, text="TITLE", font=("Arial", 30))
self.title.grid(row=0, column=0, columnspan=2)
self.frame = Frame(self.big_frame,name="test") #give it a name to check
self.frame.grid(row=1, column=0)
self.scrollb = Scrollbar(self.frame, orient=VERTICAL)
self.scrollb.grid(row=0, column=1, sticky=N+S+W)
self.scroll_canvas = Canvas(self.frame, yscrollcommand=self.scrollb.set)
self.scroll_canvas.grid(row=0, column=0, sticky=N+S+E)
self.scrollb.config(command=self.scroll_canvas.yview)
self.scroll_canvas.bind_all("<MouseWheel>", self._on_mousewheel)
self.scroll_canvas.bind_all("<Button-5>", self._on_mousewheel)
self.scroll_canvas.bind_all("<Button-4>", self._on_mousewheel)
self.my_frame = Frame(self.scroll_canvas)
for i in range(100):
self.lbl = Label(self.my_frame, text=str("label number " + str(i)))
self.lbl.grid(row=i, column=0)
self.scroll_canvas.create_window(0, 0, window=self.my_frame)
self.my_frame.update_idletasks()
self.scroll_canvas.config(scrollregion=self.scroll_canvas.bbox("all"))
def _on_mousewheel(self, event):
caller = event.widget
if "test" in str(caller): #check if event is within frame
if event.num == 5 or event.delta == -120:
self.scroll_canvas.yview_scroll(1, "units")
if event.num == 4 or event.delta == 120:
self.scroll_canvas.yview_scroll(-1, "units")
if __name__ == "__main__":
root = Tk()
ex = Example(root)
root.mainloop()页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/52869572
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