如何连接到Gtk.TreeView的信号,以便在选择行时通知我?目前我正在连接到 row_activated 信号,但这需要双击该行,并且我希望单击一下就可以收到通知。
示例程序:
using Gtk;
public class MyListView : ScrolledWindow {
ListStore list_store;
TreeView tree_view;
GLib.List<string> list;
enum Columns {
TEXT,
N_COLUMNS
}
void make_list () {
list = new GLib.List<string> ();
list.append("Hello World");
list.append("row 2");
list.append("<b>bold</b>");
list.append("<i>italic</i>");
list.append("...");
list.append("etc.");
}
public MyListView () {
make_list();
list_store = new ListStore(Columns.N_COLUMNS, typeof(string));
tree_view = new TreeView.with_model(list_store);
var text = new CellRendererText ();
var column = new TreeViewColumn ();
column.pack_start (text, true);
column.add_attribute (text, "markup", Columns.TEXT);
tree_view.append_column (column);
tree_view.set_headers_visible (false);
TreeIter iter;
foreach (string item in list) {
list_store.append(out iter);
list_store.set(
iter,
Columns.TEXT, item
);
}
this.add(tree_view);
tree_view.row_activated.connect(change);
}
public void change (TreePath path, TreeViewColumn col) {
var index = int.parse(path.to_string());
var item = list.nth_data(index);
print(index.to_string() + ". " + item + "\n");
}
}
public static void main (string[] args) {
Gtk.init(ref args);
var win = new Window();
win.add(new MyListView());
win.show_all();
win.destroy.connect(Gtk.main_quit);
Gtk.main();
}
除了 row_activated 的双击要求之外,该程序完全按照我的意愿工作。