将文本单元格和组合框单元格合并到 TreeView 列 GTK C#？

Question

我需要创建一个包含文本单元格和组合框单元格的树视图列。

如果值为 1，我想使用文本单元格。 如果值不止一个，我想使用组合框单元格。

您能否分享帮助链接或示例。

谢谢！ 维杰

Answer 1

创建了 CellRenderComboBox 对象并将此对象添加到 TreeviewColumn 对象。 用户需要注册cellRendererCombo.EditStarted += CellEditStartedHandler事件以更新组合框运行时。

using System;
using System.Threading;
using Gtk;
public partial class MainWindow : Gtk.Window
{
private Gtk.TreeView treeview1;
private int guiThreadId;
private bool stop = false;
private int threadId = 0;
public delegate void ThreadStart();

public MainWindow() : base(Gtk.WindowType.Toplevel)
{
Build();
guiThreadId = System.Threading.Thread.CurrentThread.ManagedThreadId;
// Create our TreeView
treeview1 = new Gtk.TreeView();
Gtk.ScrolledWindow scrolledWindow = new ScrolledWindow();
scrolledWindow.Add(treeview1);
Gtk.VBox vBox = new VBox();
vBox.Add(scrolledWindow);
this.Add(vBox);
CellRendererCombo cellRendererCombo = new CellRendererCombo();
Gtk.TreeViewColumn treeViewColumn = new TreeViewColumn();
treeViewColumn.Title = "TYPE";
treeViewColumn.PackStart(cellRendererCombo, false);
treeViewColumn.AddAttribute(cellRendererCombo, "text", 0);
cellRendererCombo.Editable = true;
cellRendererCombo.Model = new Gtk.ListStore(typeof(string));
cellRendererCombo.Mode = CellRendererMode.Editable;
cellRendererCombo.TextColumn = 0;
cellRendererCombo.HasEntry = false;
cellRendererCombo.WidthChars = 20;
cellRendererCombo.Style = Pango.Style.Normal;
cellRendererCombo.Edited += OnActionChanged;
cellRendererCombo.EditingStarted += CellEditingStartedHandler;
treeview1.AppendColumn(treeViewColumn);
Gtk.ListStore listStore = new ListStore(typeof(string));
listStore.AppendValues("A");
listStore.AppendValues("B");
}
protected void OnEdited(object sender, Gtk.EditedArgs args)
{
Gtk.TreeSelection selection = treeview1.Selection;
Gtk.TreeIter iter;
selection.GetSelected(out iter);
treeview1.Model.SetValue(iter, 1, args.NewText); // the CellRendererText
}
protected void CellEditingStartedHandler(object o, EditingStartedArgs args)
{
Console.WriteLine($"CellEditingStartedHandler");
if (o is Gtk.CellRendererCombo)
{
Gtk.CellRendererCombo cellRendererCombo = (Gtk.CellRendererCombo)o;
((Gtk.ListStore)cellRendererCombo.Model).Clear();
((Gtk.ListStore)cellRendererCombo.Model).AppendValues("A");
((Gtk.ListStore)cellRendererCombo.Model).AppendValues("B");
}
}
}