如何使用 gtkmm 在 TreeView 中使单个项目加粗?

How to make a single item bold in TreeView using gtkmm?

可以在执行 append_column 时提供 CellRenderer (Gtk::CellRendererText),我可以在其中用户 property_weight 设置权重。

但是,这改变了整个专栏,我的目标是能够将单个项目加粗。是否有内置方法可以执行此操作?

要求能够随时将项目从常规文本更改为粗体。

所以如果我有:

  Gtk::TreeModel::Row row = *(treeModel->append());
  row[treeColumns.id] = 1;
  row[treeColumns.name] = "[one]";

  Gtk::TreeModel::Row childrow = *(treeModel->append(row.children()));
  childrow[treeColumns.id] = 11;
  childrow[treeColumns.name] = "<b>eleven</b>";

  childrow = *(treeModel->append(row.children()));
  childrow[treeColumns.id] = 12;
  childrow[treeColumns.name] = "twelve";

  row = *(treeModel->append());
  row[treeColumns.id] = 2;
  row[treeColumns.name] = "two";

  //Add the TreeView's view columns:
  treeView->append_column("Name", treeColumns.name);
//  treeView->append_column("ID", treeColumns.id);

    treeView->expand_all();

然后我希望元素编号 11 变为粗体(它目前有 HTML 标签只是为了突出这一点),我该怎么做?

如果您指定自己的 CellRenderer,那么您可能还想通过 set_cell_data_func() 指定自己的 cell_data_func: https://developer.gnome.org/gtkmm/stable/classGtk_1_1TreeViewColumn.html#a765296845c9e9757ba405becbbc13d96

在该回调中,您可以更改单元格的属性。它看起来像这样:

MyTreeView::MyTreeView()
{
  ...
  Gtk::TreeViewColumn view_column = Gtk::manage(new Gtk::TreeViewColumn(_("Name")));
  Gtk::CellRendererText cell = Gtk::manage(new Gtk::CellRendererText());

  view_column->pack_start(*cell, false);
  view_column->set_cell_data_func(*cell, sigc::mem_fun(*this, &MyTreeView::on_cell_data_name));
  append_column(view_column);
  ...
}


void MyTreeView::on_cell_data_name(
  Gtk::CellRenderer* renderer,
  const Gtk::TreeModel::iterator& iter)
{
  //Get the value from the model and show it appropriately in the view:
  Gtk::TreeModel::Row row = *iter;
  int id = row[m_columns.m_col_id];
  Glib::ustring name = row[m_columns.m_col_name];

  if (id == SOME_MAGIC_NUMBER)
    name = "<b>" + name + "</b>";

  Gtk::CellRendererText* text_renderer = dynamic_cast<Gtk::CellRendererText*>(renderer);
  if(text_renderer)
    text_renderer.property_markup() = name;
  }
}

不使用标记,您可能更喜欢使用单元格渲染器的字体 属性。