1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
|
<?xml version="1.0" encoding="utf-8"?>
<page xmlns="http://projectmallard.org/1.0/" xmlns:its="http://www.w3.org/2005/11/its" xmlns:xi="http://www.w3.org/2001/XInclude" type="guide" style="task" id="treeview_cellrenderertoggle.py" xml:lang="es">
<info>
<title type="text">TreeView con TreeStore (Python)</title>
<link type="guide" xref="beginner.py#treeview"/>
<link type="next" xref="widget_drawing.py"/>
<revision version="0.1" date="2012-06-30" status="draft"/>
<credit type="author copyright">
<name>Marta Maria Casetti</name>
<email its:translate="no">mmcasetti@gmail.com</email>
<years>2012</years>
</credit>
<desc>Un TreeView mostrando un TreeStore (ejemplo más complejo, con CellRendererToggle)</desc>
<mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
<mal:name>Daniel Mustieles</mal:name>
<mal:email>daniel.mustieles@gmail.com</mal:email>
<mal:years>2011 - 2020</mal:years>
</mal:credit>
<mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
<mal:name>Nicolás Satragno</mal:name>
<mal:email>nsatragno@gmail.com</mal:email>
<mal:years>2012 - 2013</mal:years>
</mal:credit>
<mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
<mal:name>Jorge González</mal:name>
<mal:email>jorgegonz@svn.gnome.org</mal:email>
<mal:years>2011</mal:years>
</mal:credit>
</info>
<title>TreeView más complejo con TreeStore</title>
<media type="image" mime="image/png" src="media/treeview_cellrenderertoggle.png"/>
<p>Este TreeView muestra un ListStore con dos columnas, una de las cuales se procesa como un interruptor.</p>
<links type="section"/>
<section id="code">
<title>Código usado para generar este ejemplo</title>
<code mime="text/x-python" style="numbered">from gi.repository import Gtk
from gi.repository import Pango
import sys
books = [["Tolstoy, Leo", ["War and Peace", True], ["Anna Karenina", False]],
["Shakespeare, William", ["Hamlet", False],
["Macbeth", True], ["Othello", False]],
["Tolkien, J.R.R.", ["The Lord of the Rings", False]]]
class MyWindow(Gtk.ApplicationWindow):
def __init__(self, app):
Gtk.Window.__init__(self, title="Library", application=app)
self.set_default_size(250, 100)
self.set_border_width(10)
# the data are stored in the model
# create a treestore with two columns
self.store = Gtk.TreeStore(str, bool)
# fill in the model
for i in range(len(books)):
# the iter piter is returned when appending the author in the first column
# and False in the second
piter = self.store.append(None, [books[i][0], False])
# append the books and the associated boolean value as children of
# the author
j = 1
while j < len(books[i]):
self.store.append(piter, books[i][j])
j += 1
# the treeview shows the model
# create a treeview on the model self.store
view = Gtk.TreeView()
view.set_model(self.store)
# the cellrenderer for the first column - text
renderer_books = Gtk.CellRendererText()
# the first column is created
column_books = Gtk.TreeViewColumn("Books", renderer_books, text=0)
# and it is appended to the treeview
view.append_column(column_books)
# the cellrenderer for the second column - boolean rendered as a toggle
renderer_in_out = Gtk.CellRendererToggle()
# the second column is created
column_in_out = Gtk.TreeViewColumn("Out?", renderer_in_out, active=1)
# and it is appended to the treeview
view.append_column(column_in_out)
# connect the cellrenderertoggle with a callback function
renderer_in_out.connect("toggled", self.on_toggled)
# add the treeview to the window
self.add(view)
# callback function for the signal emitted by the cellrenderertoggle
def on_toggled(self, widget, path):
# the boolean value of the selected row
current_value = self.store[path][1]
# change the boolean value of the selected row in the model
self.store[path][1] = not current_value
# new current value!
current_value = not current_value
# if length of the path is 1 (that is, if we are selecting an author)
if len(path) == 1:
# get the iter associated with the path
piter = self.store.get_iter(path)
# get the iter associated with its first child
citer = self.store.iter_children(piter)
# while there are children, change the state of their boolean value
# to the value of the author
while citer is not None:
self.store[citer][1] = current_value
citer = self.store.iter_next(citer)
# if the length of the path is not 1 (that is, if we are selecting a
# book)
elif len(path) != 1:
# get the first child of the parent of the book (the first book of
# the author)
citer = self.store.get_iter(path)
piter = self.store.iter_parent(citer)
citer = self.store.iter_children(piter)
# check if all the children are selected
all_selected = True
while citer is not None:
if self.store[citer][1] == False:
all_selected = False
break
citer = self.store.iter_next(citer)
# if they do, the author as well is selected; otherwise it is not
self.store[piter][1] = all_selected
class MyApplication(Gtk.Application):
def __init__(self):
Gtk.Application.__init__(self)
def do_activate(self):
win = MyWindow(self)
win.show_all()
def do_startup(self):
Gtk.Application.do_startup(self)
app = MyApplication()
exit_status = app.run(sys.argv)
sys.exit(exit_status)
</code>
</section>
<section id="methods">
<title>Métodos útiles para un widget TreeView</title>
<p>El widget «TreeView» está construido alrededor del diseño <em>Modelo/Vista/Controlador</em>: el <em>Modelo</em> almacena los datos; la <em>Vista</em> obtiene las notificaciones de cambio y muestra el contenido del modelo; el <em>Controlador</em>, finalmente, cambia el estado del modelo y le notifica a la vista de los cambios. Para más información y para una lista de métodos útiles para el «TreeModel» consulte la sección <link xref="model-view-controller.py"/>.</p>
<p>En la línea 48 la señal <code>«toggled»</code> se conecta a una función de retorno de llamada <code>on_toggled()</code> usando <code><var>widget</var>.connect(<var>señal</var>, <var>función de retorno de llamada</var>)</code>. Consulte la sección <link xref="signals-callbacks.py"/> para una explicación más detallada.</p>
</section>
<section id="references">
<title>Referencias de la API</title>
<p>En este ejemplo se usa lo siguiente:</p>
<list>
<item><p><link href="http://developer.gnome.org/gtk3/unstable/GtkTreeView.html">GtkTreeView</link></p></item>
<item><p><link href="http://developer.gnome.org/gtk3/unstable/GtkTreeModel.html">GtkTreeModel</link></p></item>
<item><p><link href="http://developer.gnome.org/gtk3/unstable/GtkTreeStore.html">GtkTreeStore</link></p></item>
<item><p><link href="http://developer.gnome.org/gtk3/unstable/GtkCellRendererText.html">GtkCellRendererText</link></p></item>
<item><p><link href="http://developer.gnome.org/gtk3/unstable/GtkCellRendererToggle.html">GtkCellRendererToggle</link></p></item>
<item><p><link href="http://developer.gnome.org/gtk3/unstable/GtkTreeViewColumn.html">GtkTreeViewColumn</link></p></item>
</list>
</section>
</page>
|
