问题
I am using the tkinter Treeview
widget to show a database. The command when clicking on one of the headings is used for sorting the table based on the clicked column.
Additionally I want a tooltip box show up as soon as I hover (or right click) over one of the headings. The tooltips aren't a problem for other widgets but the heading of a treeview isn't a full widget of course.
How can I bind any action to the headings except for the usual command?
回答1:
You can bind the events to the treeview widget itself. The widget has a method named identify which can be used to determine which part of the treeview the event occurred over.
For example:
...
self.tree = ttk.Treeview(...)
self.tree.bind("<Double-1>", self.on_double_click)
...
def on_double_click(self, event):
region = self.tree.identify("region", event.x, event.y)
if region == "heading":
...
回答2:
use -command in config:
def foo():
pass
tree.heading(column1, text = 'some text', command = foo)
回答3:
Use the tree.heading
command as proposed by Mihail above, but note that if you are running from within a class
, you'll need to pass a self into the method as usual.
Here is a Python 2 snippet that will load a treeview and demonstrate calling both a method and an external function:
import Tkinter
import ttk
class TreeWindow:
def __init__(self):
win = Tkinter.Tk()
tree = ttk.Treeview(win,height=10,padding=3)
self.tree = tree
self.win = win
self.tree["columns"] = ("Column 1","Column 2")
self.tree.grid(row=1,column=0,sticky=Tkinter.NSEW)
self.tree.column("Column 1", width=100)
self.tree.heading("Column 1", text="Column 1", command=PrintColumnName1)
self.tree.column("Column 2", width=100)
self.tree.heading("Column 2", text="Column 2", command=self.PrintColumnName2)
self.tree.insert('', 0, text="Row 1", values=("a",1))
self.tree.insert('', 1, text="Row 2", values=("b",2))
self.win.mainloop()
def PrintColumnName2(self):
print("Column 2")
def PrintColumnName1():
print("Column 1")
treeWindow = TreeWindow()
Note for some reason, the first click doesn't seem to work immediately but gets stuck in the buffer until you click a second time - very eager to hear anyone with an explanation for this.
来源:https://stackoverflow.com/questions/31584415/how-to-bind-an-action-to-the-heading-of-a-tkinter-treeview-in-python