滚动 tkinter 树视图时如何移动弹出窗口?

Question

我有一个带有垂直滚动条的tkinter树视图。为了使它(看起来像(可编辑，当用户双击树视图的单元格时，我创建了一个弹出条目。但是，我无法在滚动树视图时使弹出窗口移动。

import tkinter  as tk
from tkinter import ttk
class EntryPopup(ttk.Entry):
def __init__(self, parent, itemId, col, **kw):
super().__init__(parent, **kw)
self.tv = parent
self.iId = itemId
self.column = col
self['exportselection'] = False
self.focus_force()
self.bind("<Return>", self.onReturn)
def saveEdit(self):
self.tv.set(self.iId, column=self.column, value=self.get())
print("EntryPopup::saveEdit---{}".format(self.iId))
def onReturn(self, event):
self.tv.focus_set()        
self.saveEdit()
self.destroy()

class EditableDataTable(tk.Frame):
def __init__(self, parent):
tk.Frame.__init__(self, parent)
self.parent = parent
self.tree = None
self.entryPopup = None
columns = ("Col1", "Col2")
# Create a treeview with vertical scrollbar.
self.tree = ttk.Treeview(self, columns=columns, show="headings")
self.tree.grid(column=0, row=0, sticky='news')
self.tree.heading("#1", text="col1")
self.tree.heading("#2", text="col2")
self.vsb = ttk.Scrollbar(self, orient="vertical", command=self.tree.yview)
self.tree.configure(yscrollcommand=self.vsb.set)
self.vsb.grid(column=1, row=0, sticky='ns')
self.grid_columnconfigure(0, weight=1)
self.grid_rowconfigure(0, weight=1)
self.entryPopup = None
self.curSelectedRowId = ""
col1 = []
col2 = []
for r in range(50):
col1.append("data 1-{}".format(r))
col2.append("data 2-{}".format(r))
for i in range(min(len(col1),len(col2))):
self.tree.insert('', i, values=(col1[i], col2[i]))
self.tree.bind('<Double-1>', self.onDoubleClick)
def createPopup(self, row, column):
x,y,width,height = self.tree.bbox(row, column)
# y-axis offset
pady = height // 2
self.entryPopup = EntryPopup(self.tree, row, column)
self.entryPopup.place(x=x, y=y+pady, anchor='w', width=width)

def onDoubleClick(self, event):
rowid = self.tree.identify_row(event.y)
column = self.tree.identify_column(event.x)
self.createPopup(rowid, column)
root = tk.Tk()
for row in range(2):
root.grid_rowconfigure(row, weight=1)
root.grid_columnconfigure(0, weight=1)
label = tk.Label(root, text="Double-click to edit and press 'Enter'")
label.grid(row=0, column=0, sticky='news', padx=10, pady=5)
dataTable = EditableDataTable(root)
dataTable.grid(row=1, column=0, sticky="news", pady=10, padx=10)
root.geometry("450x300")
root.mainloop()

若要重现该问题，请双击树视图。当编辑框打开时，移动鼠标指针以将鼠标悬停在树视图上。现在使用鼠标滚轮滚动。树视图会移动，但弹出编辑框不会移动。

Answer 1

我之前做过类似的事情，将函数绑定到mousewheel并重新计算悬停小部件的所有新x&y位置。

class EditableDataTable(tk.Frame):
def __init__(self, parent):
tk.Frame.__init__(self, parent)
self.parent = parent
self.tree = None
self.entryPopup = None
self.list_of_entries = []
...
self.tree.bind("<MouseWheel>", self._on_mousewheel)
def _on_mousewheel(self, event):
if self.list_of_entries:
def _move():
for i in self.list_of_entries:
try:
iid = i.iId
x, y, width, height = self.tree.bbox(iid, column="Col2") #hardcoded to col2
i.place(x=x, y=y+height//2, anchor='w', width=width)
except ValueError:
i.place_forget()
except tk.TclError:
pass
self.master.after(5, _move)
def createPopup(self, row, column):
x,y,width,height = self.tree.bbox(row, column)
# y-axis offset
pady = height // 2
self.entryPopup = EntryPopup(self.tree, row, column)
self.list_of_entries.append(self.entryPopup)
self.entryPopup.place(x=x, y=y+pady, anchor='w', width=width)

请注意，这仅适用于第二列，但对于其余列应该很容易实现。

Answer 2

我有比跟踪鼠标事件更简单的解决方案：

self.tree.configure(yscrollcommand = self.ScrollTree)
def ScrollTree(self, a, b):
if self.entryPopup is not None:
pos = self.tree.bbox(self.entryPopup.iid , 'value')
# if cell visible
if pos != '':
self.entryPopup.place(x=pos[0], y=pos[1], width = pos[2], height = pos[3])
else:
self.entryPopup.place_forget()
# update attached scrollbar
self.vsb.set(a, b)

Answer 3

您需要进行数学运算并在滚动树时移动条目小部件。我已经编辑了您的代码，并且仅对滚动条按钮进行了编程。如果单击该按钮，条目小部件将随树一起滚动。我没有对滚轮鼠标滚动或拖动滚动条进行编程。您应该能够弄清楚其余的。

import tkinter as tk
import tkinter.font as tkfont
from tkinter import ttk
class EntryPopup(ttk.Entry):
def __init__(self, parent, itemId, col, **kw):
super().__init__(parent, **kw)
self.tv = parent
self.iId = itemId
self.column = col
self['exportselection'] = False
self.focus_force()
self.bind("<Return>", self.onReturn)
def saveEdit(self):
self.tv.set(self.iId, column=self.column, value=self.get())
print("EntryPopup::saveEdit---{}".format(self.iId))
def onReturn(self, event):
self.tv.focus_set()
self.saveEdit()
self.destroy()

class EditableDataTable(tk.Frame):
def __init__(self, parent):
tk.Frame.__init__(self, parent)
self.parent = parent
self.tree = None
self.entryPopup = None
columns = ("Col1", "Col2")
# Create a treeview with vertical scrollbar.
self.tree = ttk.Treeview(self, columns=columns, show="headings")
self.tree.grid(column=0, row=0, sticky='news')
self.tree.heading("#1", text="col1")
self.tree.heading("#2", text="col2")
self.vsb = ttk.Scrollbar(self, orient="vertical", command=self.tree.yview)
self.tree.configure(yscrollcommand=self.vsb.set)
self.vsb.grid(column=1, row=0, sticky='ns')
self.grid_columnconfigure(0, weight=1)
self.grid_rowconfigure(0, weight=1)
self.entryPopup = None
self.curSelectedRowId = ""
col1 = []
col2 = []
for r in range(50):
col1.append("data 1-{}".format(r))
col2.append("data 2-{}".format(r))
for i in range(min(len(col1),len(col2))):
self.tree.insert('', i, values=(col1[i], col2[i]))
self.tree.bind('<Double-1>', self.onDoubleClick)
self.vsb.bind('<ButtonPress-1>', self.func)
def func(self, event):
print(self.vsb.identify(event.x, event.y))
if hasattr(self.entryPopup, 'y'):
item = self.vsb.identify(event.x, event.y)
if item == 'uparrow':
self.entryPopup.y += 20
elif item == 'downarrow':
self.entryPopup.y -= 20
self.entryPopup.place(x=self.entryPopup.x, y=self.entryPopup.y, )
def createPopup(self, row, column):
x, y, width, height = self.tree.bbox(row, column)
# y-axis offset
pady = height // 2
self.entryPopup = EntryPopup(self.tree, row, column)
self.entryPopup.x = x
self.entryPopup.y = y+pady
self.entryPopup.place(x=x, y=y+pady, anchor='w', width=width)

def onDoubleClick(self, event):
rowid = self.tree.identify_row(event.y)
column = self.tree.identify_column(event.x)
self.createPopup(rowid, column)

root = tk.Tk()
for row in range(2):
root.grid_rowconfigure(row, weight=1)
root.grid_columnconfigure(0, weight=1)
label = tk.Label(root, text="Double-click to edit and press 'Enter'")
label.grid(row=0, column=0, sticky='news', padx=10, pady=5)
dataTable = EditableDataTable(root)
dataTable.grid(row=1, column=0, sticky="news", pady=10, padx=10)
root.geometry("450x300")
root.mainloop()