124 lines
3.7 KiB
XML
124 lines
3.7 KiB
XML
<Type Name="TreeIterCompareFunc" FullName="Gtk.TreeIterCompareFunc">
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<TypeSignature Language="C#" Maintainer="auto" Value="public delegate int TreeIterCompareFunc(ITreeModel model, TreeIter a, TreeIter b);" />
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<TypeSignature Language="ILAsm" Value=".class public auto ansi sealed TreeIterCompareFunc extends System.MulticastDelegate" />
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<AssemblyInfo>
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<AssemblyName>gtk-sharp</AssemblyName>
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</AssemblyInfo>
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<ThreadSafetyStatement>Gtk# is thread aware, but not thread safe; See the <link location="node:gtk-sharp/programming/threads">Gtk# Thread Programming</link> for details.</ThreadSafetyStatement>
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<Base>
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<BaseTypeName>System.Delegate</BaseTypeName>
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</Base>
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<Parameters>
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<Parameter Name="model" Type="Gtk.ITreeModel" />
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<Parameter Name="a" Type="Gtk.TreeIter" />
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<Parameter Name="b" Type="Gtk.TreeIter" />
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</Parameters>
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<ReturnValue>
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<ReturnType>System.Int32</ReturnType>
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</ReturnValue>
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<Docs>
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<param name="model">To be added.</param>
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<param name="a">To be added.</param>
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<param name="b">To be added.</param>
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<summary>Delegate function to specify the shape of comparison functions for tree iterators.</summary>
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<returns>To be added.</returns>
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<remarks>Functions with this call syntax are usually used for comparison between two tree iterators as part of a sort.
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<example><code lang="C#">
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using System;
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using Gtk;
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public class SortableTreeView : TreeView {
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TreeStore ts;
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TreeIter iter;
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TreeViewColumn col0;
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TreeViewColumn col1;
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public SortableTreeView () {
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Type[] col_types = {typeof(string), typeof(string)};
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ts = new TreeStore (col_types);
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ts.SetSortFunc (0, col0_compare, IntPtr.Zero, null); // use col0_compare to sort
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iter = new TreeIter ();
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AddRow ("1,1", "1,2");
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AddRow ("2,1", "2,2");
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this.Model = ts;
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this.HeadersClickable = true;
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this.HeadersVisible = true;
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col0 = new TreeViewColumn ();
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col0.Clickable = true;
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col0.Title = "Column 1";
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CellRendererText col0_renderer = new CellRendererText ();
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col0.PackStart (col0_renderer, true);
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col0.AddAttribute (col0_renderer, "text", 0);
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col0.Clicked += new EventHandler (col0_clicked);
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this.AppendColumn (col0);
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col1 = new TreeViewColumn ();
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col1.Title = "Column 2";
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CellRendererText col1_renderer = new CellRendererText ();
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col1.PackStart (col1_renderer, true);
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col1.AddAttribute (col1_renderer, "text", 1);
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this.AppendColumn (col1);
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}
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public void AddRow (string val1, string val2) {
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ts.Append (out iter);
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ts.SetValue (iter, 0, val1);
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ts.SetValue (iter, 1, val2);
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}
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public int col0_compare (TreeModel model, TreeIter tia, TreeIter tib) {
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return String.Compare ((string) model.GetValue (tia, 0),
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(string) model.GetValue (tib, 0));
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}
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private void col0_clicked (object o, EventArgs args) {
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col0.SortOrder = SetSortOrder (col0); // set order asc or desc
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col0.SortIndicator = true; // turn on sort indicator
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ts.SetSortColumnId (0, col0.SortOrder);
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}
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public SortType SetSortOrder (TreeViewColumn col) {
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if (col.SortIndicator) {
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if (col.SortOrder == SortType.Ascending)
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return SortType.Descending;
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else return SortType.Ascending;
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}
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else return SortType.Ascending;
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}
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public static void Main () {
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Application.Init ();
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Window win = new Window ("TreeIterCompareFunc Example");
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win.DeleteEvent += new DeleteEventHandler (delete_event);
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win.SetDefaultSize (400, 250);
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ScrolledWindow sw = new ScrolledWindow ();
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win.Add (sw);
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SortableTreeView stv = new SortableTreeView ();
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sw.Add (stv);
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win.ShowAll ();
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Application.Run ();
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}
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private static void delete_event (object o, DeleteEventArgs args) {
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Application.Quit ();
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}
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}
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</code></example></remarks>
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</Docs>
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<Members />
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</Type>
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