[英]Tkinter - How to bind <Button-1> and call a function
[英]Is there an alternative for '<Button-1>' with bind() function in Tkinter ?- Python
拖動和單擊不是一回事,所以我在想也許有一個替代'<Button-1>'
在按下右鍵時說拖動。 因為在我的項目中,我無法顯示菜單(當我單擊小部件時)並同時單擊小部件(拖動它)
import tkinter as tk
from tkinter import *
from tkinter import ttk
root = Tk()
frame = Frame(root,width=500,height=900)
frame.place(x=0,y=0)
label = Label(frame,text='˃LABEL',fg='green')
label.grid(column=0,row=0)
label2 = Label(frame,text='˃LABEL2',fg='green')
label3 = Label(frame,text='˃LABEL3',fg='green')
def change(event):
label['text'] = '˅LABEL'
label2.grid(column=0,row=1)
label3.grid(column=0,row=2)
if label['text'] == '˅LABEL':
label.bind('<Button-1>', hide)
def hide(event):
label['text'] = '˃LABEL'
label2.grid_forget()
label3.grid_forget()
if label['text'] == '˃LABEL':
label.bind('<Button-1>',change)
label.bind('<Button-1>',change)
def make_draggable(widget):
widget.bind("<Button-1>", on_drag_start)
widget.bind("<B1-Motion>", on_drag_motion)
def on_drag_start(event):
widget = event.widget
widget._drag_start_x = event.x
widget._drag_start_y = event.y
def on_drag_motion(event):
widget = event.widget
x = widget.winfo_x() - widget._drag_start_x + event.x
y = widget.winfo_y() - widget._drag_start_y + event.y
widget.place(x=x, y=y)
make_draggable(label)
root.mainloop()
是的,您可以使用 Boolean 值 True 和 False 綁定單個按鈕來執行兩個操作。 請看下面的示例,我使用空格鍵更改背景顏色。
import tkinter
class ChangeColor(tkinter.Tk):
change = False
def __init__(self):
super().__init__()
self.geometry("300x200+0+0")
self.bind("<space>", self.change_color)
self.label_1 = tkinter.Label(self, text="Press space bar key to change my background color",background="Red", relief=tkinter.GROOVE, pady=20)
self.label_1.pack(fill=tkinter.BOTH)
def change_color(self, *args):
if self.change:
self.change_to_red()
else:
self.change_to_green()
def change_to_red(self):
self.change=False
self.label_1.config(background="Red")
self.label_1.config(text="My background is now red")
def change_to_green(self):
self.label_1.config(background="Green")
self.change=True
self.label_1.config(text="My background is now green")
if __name__ == "__main__":
ChangeColor().mainloop()
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