treeview - Vala 中的 Gtk.TreeView 可编辑列

Question

有没有什么简单的方法可以让 Gtk.Treeview 在编辑时更新它的列？

我基于 Gtk.ListStore 模型构建了 Treeview。我这样初始化单元格:

Gtk.CellRendererText valueCells = new Gtk.CellRendererText ();
valueCells.editable = true;
tree_view.insert_column_with_attributes (-1, "Key", valueCells, "text", 0);
tree_view.insert_column_with_attributes (-1, "Value", valueCells, "text", 1);

我现在可以选择和编辑列，直到我退出选择。 TreeView 和 ListStore 都没有更新。尝试了几种我发现用不同语言编写的解决方案，但没有任何效果。我知道我必须更新模型，但无法弄清楚如何找到对此的引用。我是否错过了一些重要的东西？哦

Answer 1

您必须连接 edited 信号才能收到用户所做更改的通知，这是一个完整的示例:

class MainWindow : Gtk.Window {

    public MainWindow () {
        Gtk.TreeView tree_view = new Gtk.TreeView ();
        setup_treeview (tree_view);

        add(tree_view);
    }


    private void setup_treeview (Gtk.TreeView view) {
        var listmodel = new Gtk.ListStore (4, typeof (string), typeof (string),
                                              typeof (string), typeof (string));
        view.set_model (listmodel);

        view.insert_column_with_attributes (-1, "Account Name", new Gtk.CellRendererText (), "text", 0);
        view.insert_column_with_attributes (-1, "Type", new Gtk.CellRendererText (), "text", 1);

        var cell = new Gtk.CellRendererText ();
        cell.set ("foreground_set", true);
        cell.editable = true;
        cell.edited.connect ((path, new_text) => {
                stdout.printf (path + "\n");
                stdout.printf (new_text + "\n");
                stdout.flush ();
            });
        view.insert_column_with_attributes (-1, "Balance", cell, "text", 2, "foreground", 3);

        Gtk.TreeIter iter;
        listmodel.append (out iter);
        listmodel.set (iter, 0, "My Visacard", 1, "card", 2, "102,10", 3, "red");

        listmodel.append (out iter);
        listmodel.set (iter, 0, "My Mastercard", 1, "card", 2, "10,20", 3, "red");
    }

}

int main (string[] args) {
    Gtk.init (ref args);
    MainWindow window = new MainWindow ();

    window.title = "Tree View test";
    window.border_width = 10;
    window.window_position = Gtk.WindowPosition.CENTER;
    window.set_default_size (350, 200);
    window.destroy.connect (Gtk.main_quit);

    window.show_all ();
    Gtk.main ();
    return 0;
}

重要的一点在这里:

var cell = new Gtk.CellRendererText ();
cell.editable = true;
cell.edited.connect ((path, new_text) => {
    stdout.printf (path + "\n");
    stdout.printf (new_text + "\n");
    stdout.flush ();
});

它将修改单元格的路径和new_text打印到命令行。

您现在要做的就是相应地更新模型。