我是Python Gtk3的新手，实际上是学习基础知识。在此代码中，我尝试使用对话框窗口在数据中添加项目，然后使其在主窗口中作为新的流程图子项显示在流程图中。问题是添加了flowbox子项，但没有标签出现在其中。我无法弄清楚原因。
请告诉我这段代码有什么问题？
#!/usr/bin/python3
import gi
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk
# MAIN WINDOW #
class PyApp:
def __init__(self):
builder = Gtk.Builder()
builder.add_from_file("ui.glade")
dic = {"on_quit" : Gtk.main_quit,"on_add" : self.on_add}
builder.connect_signals(dic)
self.obj = builder.get_object
self.items = self.getItems()
self.box = self.obj("flowbox")
if len(self.items) > 0:
for item in self.items:
self.box.add(Gtk.Label(item[0])) # newItem[0] for item id
self.obj('main').show_all()
def on_add(self, widget):
"""Called when the user clicks on the add button"""
itemDlg = itemDialog();
result,newItem = itemDlg.run()
if (result == 0):
print('*** Adding new item in items data ***')
self.items.append([newItem.id,newItem.name])
label = Gtk.Label(newItem.id)
self.box.add(label)
def getItems(self):
items = [["id1", "name1"],["id2", "name2"],["id3", "name3"]]
return items
# ADD DIALOG #
class itemDialog:
def __init__(self, id="", name=""):
self.dlg = app.obj("add")
self.item = Item(id,name)
def run(self):
self.result = self.dlg.run()
#get the value of the entry fields
self.item.id = app.obj('input_id').get_text()
self.item.name = app.obj('input_name').get_text()
self.dlg.hide()
#return the result and the item
return self.result,self.item
class Item:
"""This class represents all item information"""
def __init__(self, id="",name=""):
self.id = id
self.name = name
def getItem(self):
return [self.id, self.name]
if __name__ == "__main__":
app=PyApp()
Gtk.main()
林间空地文件：
<?xml version="1.0" encoding="UTF-8"?>
<!-- Generated with glade 3.20.0 -->
<interface>
<requires lib="gtk+" version="3.20"/>
<object class="GtkWindow" id="main">
<property name="can_focus">False</property>
<property name="default_width">600</property>
<property name="default_height">500</property>
<signal name="destroy" handler="on_quit" swapped="no"/>
<child>
<object class="GtkBox" id="box">
<property name="visible">True</property>
<property name="can_focus">False</property>
<property name="orientation">vertical</property>
<child>
<object class="GtkToolbar" id="toolbar">
<property name="visible">True</property>
<property name="can_focus">False</property>
<child>
<object class="GtkToolButton" id="btn_add">
<property name="visible">True</property>
<property name="can_focus">False</property>
<property name="use_underline">True</property>
<property name="icon_name">list-add</property>
<signal name="clicked" handler="on_add" swapped="no"/>
</object>
<packing>
<property name="expand">False</property>
<property name="homogeneous">True</property>
</packing>
</child>
<child>
<object class="GtkSeparatorToolItem" id="sep">
<property name="visible">True</property>
<property name="can_focus">False</property>
</object>
<packing>
<property name="expand">False</property>
<property name="homogeneous">False</property>
</packing>
</child>
<child>
<object class="GtkToolButton" id="btn_quit">
<property name="visible">True</property>
<property name="can_focus">False</property>
<property name="can_default">True</property>
<property name="tooltip_text" translatable="yes">Quitter</property>
<property name="use_underline">True</property>
<property name="icon_name">application-exit</property>
<signal name="clicked" handler="on_quit" swapped="no"/>
</object>
<packing>
<property name="expand">False</property>
<property name="homogeneous">True</property>
</packing>
</child>
</object>
<packing>
<property name="expand">False</property>
<property name="fill">True</property>
<property name="position">0</property>
</packing>
</child>
<child>
<object class="GtkFlowBox" id="flowbox">
<property name="visible">True</property>
<property name="can_focus">False</property>
<property name="min_children_per_line">3</property>
<property name="max_children_per_line">3</property>
</object>
<packing>
<property name="expand">True</property>
<property name="fill">True</property>
<property name="position">2</property>
</packing>
</child>
</object>
</child>
<child type="titlebar">
<placeholder/>
</child>
</object>
<object class="GtkDialog" id="add">
<property name="can_focus">False</property>
<property name="resizable">False</property>
<property name="type_hint">dialog</property>
<property name="urgency_hint">True</property>
<property name="transient_for">main</property>
<property name="attached_to">main</property>
<child internal-child="vbox">
<object class="GtkBox">
<property name="can_focus">False</property>
<property name="margin_left">2</property>
<property name="margin_right">2</property>
<property name="margin_top">2</property>
<property name="margin_bottom">2</property>
<property name="orientation">vertical</property>
<property name="spacing">2</property>
<child internal-child="action_area">
<object class="GtkButtonBox">
<property name="can_focus">False</property>
<property name="layout_style">end</property>
<child>
<object class="GtkButton" id="btn-cancel">
<property name="label">gtk-undo</property>
<property name="visible">True</property>
<property name="can_focus">True</property>
<property name="receives_default">True</property>
<property name="use_stock">True</property>
<property name="always_show_image">True</property>
</object>
<packing>
<property name="expand">True</property>
<property name="fill">True</property>
<property name="position">0</property>
</packing>
</child>
<child>
<object class="GtkButton" id="btn-vali">
<property name="label">gtk-add</property>
<property name="visible">True</property>
<property name="can_focus">True</property>
<property name="receives_default">True</property>
<property name="use_stock">True</property>
<property name="always_show_image">True</property>
</object>
<packing>
<property name="expand">True</property>
<property name="fill">True</property>
<property name="position">1</property>
</packing>
</child>
</object>
<packing>
<property name="expand">False</property>
<property name="fill">False</property>
<property name="position">0</property>
</packing>
</child>
<child>
<object class="GtkGrid">
<property name="visible">True</property>
<property name="can_focus">False</property>
<property name="margin_top">20</property>
<property name="margin_bottom">20</property>
<child>
<object class="GtkLabel" id="label_id">
<property name="visible">True</property>
<property name="can_focus">False</property>
<property name="halign">start</property>
<property name="margin_left">5</property>
<property name="margin_right">5</property>
<property name="margin_top">5</property>
<property name="margin_bottom">5</property>
<property name="label" translatable="yes">Id
</property>
</object>
<packing>
<property name="left_attach">0</property>
<property name="top_attach">0</property>
</packing>
</child>
<child>
<object class="GtkEntry" id="input_id">
<property name="visible">True</property>
<property name="can_focus">True</property>
<property name="margin_left">5</property>
<property name="margin_right">5</property>
<property name="margin_top">5</property>
<property name="margin_bottom">5</property>
</object>
<packing>
<property name="left_attach">1</property>
<property name="top_attach">0</property>
</packing>
</child>
<child>
<object class="GtkLabel" id="label_name">
<property name="visible">True</property>
<property name="can_focus">False</property>
<property name="halign">start</property>
<property name="margin_left">5</property>
<property name="margin_right">5</property>
<property name="margin_top">5</property>
<property name="margin_bottom">5</property>
<property name="label" translatable="yes">Name</property>
</object>
<packing>
<property name="left_attach">0</property>
<property name="top_attach">1</property>
</packing>
</child>
<child>
<object class="GtkEntry" id="input_name">
<property name="visible">True</property>
<property name="can_focus">True</property>
<property name="margin_left">5</property>
<property name="margin_right">5</property>
<property name="margin_top">5</property>
<property name="margin_bottom">5</property>
</object>
<packing>
<property name="left_attach">1</property>
<property name="top_attach">1</property>
</packing>
</child>
</object>
<packing>
<property name="expand">False</property>
<property name="fill">True</property>
<property name="position">1</property>
</packing>
</child>
</object>
</child>
<action-widgets>
<action-widget response="-6">btn-cancel</action-widget>
<action-widget response="0">btn-vali</action-widget>
</action-widgets>
</object>
</interface>
答案 0 :(得分：0)
在第33行创建后，只需添加android:orientation="vertical"
，即可看到您的小部件。您可能还对容器的label.show()函数感兴趣。