如何将“隐藏数据”分配给 Gtk.TreeView 行以便用 Gtk.TreeView.connect("row-activated") 捕获它们？
How to assign “hidden data” to Gtk.TreeView row in order to catch them with Gtk.TreeView.connect("row-activated")?
在 Python 中，我有一个 class person 包含 firstName 和 lastName 以及 country 属性（实际上他们是更多其他数据，但我简化了它作为示例）。
所以，我生成一个table 应该只显示firstName和lastName（用户不应该看到国家）。但是当用户点击特定行时，我想获得完整的 person 对象。
这是我的代码：
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
# MWE for hidden data in Gtk.TreeView
import sys
import os
import gi
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk
from gi.repository import Gdk
from gi.repository import Gio
from gi.repository import Pango
class person():
def __init__(self, firstName, lastName, country):
self.firstName=firstName
self.lastName=lastName
self.country=country
personsList=[
person("Ada", "Lovelace", "UK"),
person("Alan", "Turing", "UK"),
person("Denis", "Richie", "USA")
]
def onRowChange(widget, row, col):
# This function is executed when a user click on a row
print(widget)
print(row)
print(col)
pass
class GridWindow(Gtk.Window):
def __init__(self):
Gtk.Window.__init__(self, title="TreeView MWE")
self.connect("destroy", Gtk.main_quit)
# Setting up the self.grid in which the elements are to be positionned
self.grid = Gtk.Grid()
self.grid.set_column_homogeneous(True)
self.grid.set_row_homogeneous(True)
self.add(self.grid)
# Preparing the list store
listStore=Gtk.ListStore(str, str)
for aPerson in personsList:
listStore.append([aPerson.firstName, aPerson.lastName])
# Seting up the TreeView and given the ListStore to the Treeview
treeView=Gtk.TreeView(model=listStore)
renderer_text = Gtk.CellRendererText()
# Preparing the headers
column_text = Gtk.TreeViewColumn("First Name", renderer_text, text=0)
treeView.append_column(column_text)
column_text = Gtk.TreeViewColumn("Last Name", renderer_text, text=1)
treeView.append_column(column_text)
# Setting the event connection
treeView.connect("row-activated", onRowChange)
# Attaching the treeView to the Gride
self.grid.add(treeView)
screen = Gdk.Screen.get_default()
styleContext = Gtk.StyleContext()
win = GridWindow()
win.connect("destroy", Gtk.main_quit)
win.show_all()
Gtk.main()
这是效果图：
可以看到，根据row_activated信号的，onRowChange()函数在用户点击的时候只能得到TreeView和TreeViewColumn对象文档。
我知道我可以获得行号并在列表中搜索 对象有这个行号但是它太危险而且有点 hacky.
那么，他们是否可以将用户的隐藏数据包含在 Gtk.ListStore 中并使用 row-activated 信号捕获该数据？
您可以只将数据添加到您的列表存储中，而无需在树视图中显示。
以下代码片段显示了必要的更改：
...
def onRowChange(widget, row, col):
# This function is executed when a user click on a row
model = widget.get_model()
iter_ = model.get_iter(row)
person = model.get_value(iter_, 2)
print(person.country)
class GridWindow(Gtk.Window):
def __init__(self):
Gtk.Window.__init__(self, title="TreeView MWE")
self.connect("destroy", Gtk.main_quit)
# Setting up the self.grid in which the elements are to be positionned
self.grid = Gtk.Grid()
self.grid.set_column_homogeneous(True)
self.grid.set_row_homogeneous(True)
self.add(self.grid)
# Preparing the list store
listStore=Gtk.ListStore(str, str, object)
for aPerson in personsList:
listStore.append([aPerson.firstName, aPerson.lastName, aPerson])
...
请尝试下面的示例。一些原始代码被注释掉，下面是用#*** 突出显示的替换代码。
单击一行时，控制台应显示包含三个字段（名字、姓氏和国家/地区）的列表。
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
# MWE for hidden data in Gtk.TreeView
import sys
import os
import gi
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk
from gi.repository import Gdk
from gi.repository import Gio
from gi.repository import Pango
class person():
def __init__(self, firstName, lastName, country):
self.firstName=firstName
self.lastName=lastName
self.country=country
personsList=[
person("Ada", "Lovelace", "UK"),
person("Alan", "Turing", "UK"),
person("Denis", "Richie", "USA")
]
#*** Instead use: def on_row_activated(self, widget, row, col_view):
#def onRowChange(widget, row, col):
# # This function is executed when a user click on a row
# print(widget)
# print(row)
# print(col)
# pass
class GridWindow(Gtk.Window):
def __init__(self):
Gtk.Window.__init__(self, title="TreeView MWE")
self.set_size_request(200,150)
self.connect("destroy", Gtk.main_quit)
# Setting up the self.grid in which the elements are to be positionned
self.grid = Gtk.Grid()
self.grid.set_column_homogeneous(True)
self.grid.set_row_homogeneous(True)
self.add(self.grid)
# Preparing the list store
#listStore=Gtk.ListStore(str, str)
#*** Increase to three strings
listStore=Gtk.ListStore(str, str, str)
for aPerson in personsList:
#listStore.append([aPerson.firstName, aPerson.lastName])
#*** Add the country
listStore.append([aPerson.firstName, aPerson.lastName, aPerson.country])
# Seting up the TreeView and given the ListStore to the Treeview
treeView=Gtk.TreeView(model=listStore)
renderer_text = Gtk.CellRendererText()
# Preparing the headers
column_text = Gtk.TreeViewColumn("First Name", renderer_text, text=0)
treeView.append_column(column_text)
column_text = Gtk.TreeViewColumn("Last Name", renderer_text, text=1)
treeView.append_column(column_text)
# Setting the event connection
#treeView.connect("row-activated", onRowChange)
#*** Change connection so double-clicking on row calls self.on_row_activated
treeView.connect("row-activated", self.on_row_activated)
# Attaching the treeView to the Grid
self.grid.add(treeView)
#*** Change to using this callback when a row is double-clicked.
def on_row_activated(self, widget, row, col_view):
""" Calllback for double-click on Treeview row"""
model = widget.get_model()
row_list = []
for i in range(model.get_n_columns()):
#print(model[row][i])
row_list.append(model[row][i])
print(row_list)
# Example of what the console displays upon double-clicking a row...
# ['Alan', 'Turing', 'UK']
# ['Denis', 'Richie', 'USA']
screen = Gdk.Screen.get_default()
styleContext = Gtk.StyleContext()
win = GridWindow()
win.connect("destroy", Gtk.main_quit)
win.show_all()
Gtk.main()
在 Python 中，我有一个 class person 包含 firstName 和 lastName 以及 country 属性（实际上他们是更多其他数据，但我简化了它作为示例）。
所以，我生成一个table 应该只显示firstName和lastName（用户不应该看到国家）。但是当用户点击特定行时，我想获得完整的 person 对象。
这是我的代码：
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
# MWE for hidden data in Gtk.TreeView
import sys
import os
import gi
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk
from gi.repository import Gdk
from gi.repository import Gio
from gi.repository import Pango
class person():
def __init__(self, firstName, lastName, country):
self.firstName=firstName
self.lastName=lastName
self.country=country
personsList=[
person("Ada", "Lovelace", "UK"),
person("Alan", "Turing", "UK"),
person("Denis", "Richie", "USA")
]
def onRowChange(widget, row, col):
# This function is executed when a user click on a row
print(widget)
print(row)
print(col)
pass
class GridWindow(Gtk.Window):
def __init__(self):
Gtk.Window.__init__(self, title="TreeView MWE")
self.connect("destroy", Gtk.main_quit)
# Setting up the self.grid in which the elements are to be positionned
self.grid = Gtk.Grid()
self.grid.set_column_homogeneous(True)
self.grid.set_row_homogeneous(True)
self.add(self.grid)
# Preparing the list store
listStore=Gtk.ListStore(str, str)
for aPerson in personsList:
listStore.append([aPerson.firstName, aPerson.lastName])
# Seting up the TreeView and given the ListStore to the Treeview
treeView=Gtk.TreeView(model=listStore)
renderer_text = Gtk.CellRendererText()
# Preparing the headers
column_text = Gtk.TreeViewColumn("First Name", renderer_text, text=0)
treeView.append_column(column_text)
column_text = Gtk.TreeViewColumn("Last Name", renderer_text, text=1)
treeView.append_column(column_text)
# Setting the event connection
treeView.connect("row-activated", onRowChange)
# Attaching the treeView to the Gride
self.grid.add(treeView)
screen = Gdk.Screen.get_default()
styleContext = Gtk.StyleContext()
win = GridWindow()
win.connect("destroy", Gtk.main_quit)
win.show_all()
Gtk.main()
这是效果图：
可以看到，根据row_activated信号的，onRowChange()函数在用户点击的时候只能得到TreeView和TreeViewColumn对象文档。
我知道我可以获得行号并在列表中搜索 对象有这个行号但是它太危险而且有点 hacky.
那么，他们是否可以将用户的隐藏数据包含在 Gtk.ListStore 中并使用 row-activated 信号捕获该数据？
您可以只将数据添加到您的列表存储中，而无需在树视图中显示。 以下代码片段显示了必要的更改：
...
def onRowChange(widget, row, col):
# This function is executed when a user click on a row
model = widget.get_model()
iter_ = model.get_iter(row)
person = model.get_value(iter_, 2)
print(person.country)
class GridWindow(Gtk.Window):
def __init__(self):
Gtk.Window.__init__(self, title="TreeView MWE")
self.connect("destroy", Gtk.main_quit)
# Setting up the self.grid in which the elements are to be positionned
self.grid = Gtk.Grid()
self.grid.set_column_homogeneous(True)
self.grid.set_row_homogeneous(True)
self.add(self.grid)
# Preparing the list store
listStore=Gtk.ListStore(str, str, object)
for aPerson in personsList:
listStore.append([aPerson.firstName, aPerson.lastName, aPerson])
...
请尝试下面的示例。一些原始代码被注释掉，下面是用#*** 突出显示的替换代码。
单击一行时，控制台应显示包含三个字段（名字、姓氏和国家/地区）的列表。
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
# MWE for hidden data in Gtk.TreeView
import sys
import os
import gi
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk
from gi.repository import Gdk
from gi.repository import Gio
from gi.repository import Pango
class person():
def __init__(self, firstName, lastName, country):
self.firstName=firstName
self.lastName=lastName
self.country=country
personsList=[
person("Ada", "Lovelace", "UK"),
person("Alan", "Turing", "UK"),
person("Denis", "Richie", "USA")
]
#*** Instead use: def on_row_activated(self, widget, row, col_view):
#def onRowChange(widget, row, col):
# # This function is executed when a user click on a row
# print(widget)
# print(row)
# print(col)
# pass
class GridWindow(Gtk.Window):
def __init__(self):
Gtk.Window.__init__(self, title="TreeView MWE")
self.set_size_request(200,150)
self.connect("destroy", Gtk.main_quit)
# Setting up the self.grid in which the elements are to be positionned
self.grid = Gtk.Grid()
self.grid.set_column_homogeneous(True)
self.grid.set_row_homogeneous(True)
self.add(self.grid)
# Preparing the list store
#listStore=Gtk.ListStore(str, str)
#*** Increase to three strings
listStore=Gtk.ListStore(str, str, str)
for aPerson in personsList:
#listStore.append([aPerson.firstName, aPerson.lastName])
#*** Add the country
listStore.append([aPerson.firstName, aPerson.lastName, aPerson.country])
# Seting up the TreeView and given the ListStore to the Treeview
treeView=Gtk.TreeView(model=listStore)
renderer_text = Gtk.CellRendererText()
# Preparing the headers
column_text = Gtk.TreeViewColumn("First Name", renderer_text, text=0)
treeView.append_column(column_text)
column_text = Gtk.TreeViewColumn("Last Name", renderer_text, text=1)
treeView.append_column(column_text)
# Setting the event connection
#treeView.connect("row-activated", onRowChange)
#*** Change connection so double-clicking on row calls self.on_row_activated
treeView.connect("row-activated", self.on_row_activated)
# Attaching the treeView to the Grid
self.grid.add(treeView)
#*** Change to using this callback when a row is double-clicked.
def on_row_activated(self, widget, row, col_view):
""" Calllback for double-click on Treeview row"""
model = widget.get_model()
row_list = []
for i in range(model.get_n_columns()):
#print(model[row][i])
row_list.append(model[row][i])
print(row_list)
# Example of what the console displays upon double-clicking a row...
# ['Alan', 'Turing', 'UK']
# ['Denis', 'Richie', 'USA']
screen = Gdk.Screen.get_default()
styleContext = Gtk.StyleContext()
win = GridWindow()
win.connect("destroy", Gtk.main_quit)
win.show_all()
Gtk.main()