针对不同级别TreeView节点的不同模型

Question

假设我有一个表示产品列表的TreeView（带有支持TreeStore）。

一个产品有以下规格：

1. 名称
2. 目录编号
3. 评论

而且，每个产品都有它构建的组件列表。 我想显示关于树的子节点中的组件的数据（所以它基本上是2级树视图），但是然后顶级节点将具有与子节点不同的模型。

我该如何使用Glade来完成它（或者如果通过Python + PyGObjecy进行重新设置）？

Answer 1

每个TreeView只能有一个模型，但是您可以创建一个模型，将两个（或更多）模型粘合在一起，并添加一些布尔列来控制该行应显示的模型。然后，添加一组CellRenderer并将其可见性映射到这些控件列。

这样做的困难在于，如果您希望列的顶部显示名称，那么可能难以订购信息。如果你可以线框化你希望树看起来像我可以提供一个基本的示例实现。

== EDIT ==

这是一个例子：

main.py：

from gi.repository import Gtk 
from os.path import abspath, dirname, join 

WHERE_AM_I = abspath(dirname(__file__)) 

# My Model map 
mm = { 
    'name'  : 0, 
    'catalog_num' : 1, 
    'comment'  : 2, 
    'component' : 3, 
    'is_top'  : 4, 
    'is_child' : 5, 
} 

class MyApp(object): 

    def __init__(self): 
     """ 
     Build GUI 
     """ 

     # Build GUI from Glade file 
     self.builder = Gtk.Builder() 
     self.glade_file = join(WHERE_AM_I, 'gui.glade') 
     self.builder.add_from_file(self.glade_file) 

     # Get objects 
     go = self.builder.get_object 
     self.window = go('window') 
     self.treestore = go('treestore') 

     # Fill model 
     self._load_model() 

     # Connect signals 
     self.builder.connect_signals(self) 
     self.window.connect('delete-event', lambda x,y: Gtk.main_quit()) 

     # Everything is ready 
     self.window.show() 


    def _load_model(self): 

     my_data = [ 
       ['Cheese', 'F001', 'This is the best cheese ever!', '', True, False], 
       ['Pepperoni', 'F002', 'Delicious pepperoni :}', '', True, False], 
       ['Pepperonni Pizza', 'P001', 'Yes, I\'m hungry :(', '', True, False], 
       ['', '', None, 'Cheese', False, True], 
       ['', '', None, 'Pepperonni', False, True], 
      ] 

     parent = None 
     for i in my_data: 
      if i[mm['is_child']]: 
       self.treestore.append(parent, i) 
      else: 
       parent = self.treestore.append(None, i) 


if __name__ == '__main__': 
    gui = MyApp() 
    Gtk.main() 

gui.glade：

<?xml version="1.0" encoding="UTF-8"?> 
<interface> 
    <!-- interface-requires gtk+ 3.0 --> 
    <object class="GtkTreeStore" id="treestore"> 
    <columns> 
     <!-- column-name name --> 
     <column type="gchararray"/> 
     <!-- column-name catalog_num --> 
     <column type="gchararray"/> 
     <!-- column-name comment --> 
     <column type="gchararray"/> 
     <!-- column-name component --> 
     <column type="gchararray"/> 
     <!-- column-name is_top --> 
     <column type="gboolean"/> 
     <!-- column-name is_child --> 
     <column type="gboolean"/> 
    </columns> 
    </object> 
    <object class="GtkWindow" id="window"> 
    <property name="can_focus">False</property> 
    <property name="border_width">10</property> 
    <property name="title" translatable="yes">TreeView test</property> 
    <property name="window_position">center-always</property> 
    <property name="default_width">400</property> 
    <property name="default_height">300</property> 
    <child> 
     <object class="GtkScrolledWindow" id="scrolledwindow"> 
     <property name="visible">True</property> 
     <property name="can_focus">True</property> 
     <property name="shadow_type">in</property> 
     <child> 
      <object class="GtkTreeView" id="treeview"> 
      <property name="visible">True</property> 
      <property name="can_focus">True</property> 
      <property name="model">treestore</property> 
      <property name="headers_visible">False</property> 
      <property name="headers_clickable">False</property> 
      <property name="search_column">1</property> 
      <property name="tooltip_column">2</property> 
      <child internal-child="selection"> 
       <object class="GtkTreeSelection" id="treeview-selection"/> 
      </child> 
      <child> 
       <object class="GtkTreeViewColumn" id="treeviewcolumn_name"> 
       <property name="title" translatable="yes">Name</property> 
       <child> 
        <object class="GtkCellRendererText" id="cellrenderertext_name"/> 
        <attributes> 
        <attribute name="visible">4</attribute> 
        <attribute name="text">0</attribute> 
        </attributes> 
       </child> 
       <child> 
        <object class="GtkCellRendererText" id="cellrenderertext_component"/> 
        <attributes> 
        <attribute name="visible">5</attribute> 
        <attribute name="text">3</attribute> 
        </attributes> 
       </child> 
       </object> 
      </child> 
      <child> 
       <object class="GtkTreeViewColumn" id="treeviewcolumn_catalog_num"> 
       <property name="title" translatable="yes">Catalog #</property> 
       <child> 
        <object class="GtkCellRendererText" id="cellrenderertext_catalog"/> 
        <attributes> 
        <attribute name="visible">4</attribute> 
        <attribute name="text">1</attribute> 
        </attributes> 
       </child> 
       </object> 
      </child> 
      </object> 
     </child> 
     </object> 
    </child> 
    </object> 
</interface> 

代码可以也可以在01找到