c# – GTK#Treeview – 如何对子节点进行排序

>创建一个列(没有快捷方式)并为SortColumnId属性赋值.为了简单起见,我通常从0开始分配列的序号id,即视图中的第一列为0,第二列为1,依此类推.
>将模型包装在Gtk.TreeModelSort中
>在新模型上调用SetSortFunc一次,对于要排序的列,并将您在(1)中设置的列ID作为第一个参数传递.确保匹配所有列ID.

行的排序方式取决于您用作SetSortFunc的第二个参数的委托.你得到了模型和两个iters,你几乎可以做任何事情,甚至可以对多个列进行排序(使用两个iters,你可以从模型中获取任何值,而不仅仅是排序列中显示的值.)

这是一个简单的例子：

class MainClass
{
public static void Main (string[] args)
{
        Application.Init ();
        var win = CreateTreeWindow();
        win.ShowAll ();
        Application.Run ();
    }

    public static Gtk.Window CreateTreeWindow()
    {
        Gtk.Window window = new Gtk.Window("Sortable TreeView");

        Gtk.TreeIter iter;
        Gtk.TreeViewColumn col;
        Gtk.CellRendererText cell;

        Gtk.TreeView tree = new Gtk.TreeView();

        cell = new Gtk.CellRendererText();
        col = new Gtk.TreeViewColumn();
        col.Title = "Column 1";            
        col.PackStart(cell,true);
        col.AddAttribute(cell,"text",0);
        col.SortColumnId = 0;

        tree.AppendColumn(col);

        cell = new Gtk.CellRendererText();
        col = new Gtk.TreeViewColumn();
        col.Title = "Column 2";            
        col.PackStart(cell,1);

        tree.AppendColumn(col);

        Gtk.TreeStore store = new Gtk.TreeStore(typeof (string),typeof (string));
        iter = store.AppendValues("BBB");
        store.AppendValues(iter,"AAA","Zzz");
        store.AppendValues(iter,"DDD","Ttt");
        store.AppendValues(iter,"CCC","Ggg");

        iter = store.AppendValues("AAA");
        store.AppendValues(iter,"ZZZ","GGG","Ggg");
        store.AppendValues(iter,"TTT","Ttt");

        Gtk.TreeModelSort sortable = new Gtk.TreeModelSort(store);
        sortable.SetSortFunc(0,delegate(TreeModel model,TreeIter a,TreeIter b) {
            string s1 = (string)model.GetValue(a,0);
            string s2 = (string)model.GetValue(b,0);
            return String.Compare(s1,s2);
        });

        tree.Model = sortable;

        window.Add(tree);

        return window;
    }
}