GtkSharp/Source/sample/TreeModelDemo.cs
2017-09-04 22:36:28 -03:00

348 lines
8.1 KiB
C#

// TreeModelSample.cs - TreeModelSample application.
//
// Author: Mike Kestner <mkestner@novell.com>
//
// Copyright (c) 2007 Novell, Inc.
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of version 2 of the Lesser GNU General
// Public License as published by the Free Software Foundation.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this program; if not, write to the
// Free Software Foundation, Inc., 59 Temple Place - Suite 330,
// Boston, MA 02111-1307, USA.
namespace GtkSamples {
using System;
using System.Collections;
using System.Reflection;
using System.Runtime.InteropServices;
using Gtk;
public class TreeModelDemo : Gtk.Window {
public TreeModelDemo () : base ("TreeModel demo")
{
DefaultSize = new Gdk.Size (640,480);
ScrolledWindow sw = new ScrolledWindow ();
TreeView view = new TreeView (new TreeModelAdapter (new MyTreeModel ()));
view.HeadersVisible = true;
view.AppendColumn ("Name", new CellRendererText (), "text", 0);
view.AppendColumn ("Type", new CellRendererText (), "text", 1);
sw.Add (view);
sw.ShowAll ();
Add (sw);
}
protected override bool OnDeleteEvent (Gdk.Event ev)
{
Application.Quit ();
return true;
}
public static void Main (string[] args)
{
Application.Init ();
Gtk.Window win = new TreeModelDemo ();
win.Show ();
Application.Run ();
}
}
public class MyTreeModel : GLib.Object, ITreeModelImplementor {
Assembly[] assemblies;
public MyTreeModel ()
{
assemblies = AppDomain.CurrentDomain.GetAssemblies ();
}
object GetNodeAtPath (TreePath path)
{
if (path.Indices.Length > 0) {
Assembly assm = assemblies [path.Indices [0]];
if (path.Indices.Length > 1) {
Type t = assm.GetTypes ()[path.Indices [1]];
if (path.Indices.Length > 2)
return t.GetMembers () [path.Indices [2]];
else
return t;
} else
return assm;
} else
return null;
}
Hashtable node_hash = new Hashtable ();
public TreeModelFlags Flags {
get {
return TreeModelFlags.ItersPersist;
}
}
public int NColumns {
get {
return 2;
}
}
public GLib.GType GetColumnType (int col)
{
GLib.GType result = GLib.GType.String;
return result;
}
TreeIter IterFromNode (object node)
{
GCHandle gch;
if (node_hash [node] != null) {
gch = (GCHandle) node_hash [node];
} else {
gch = GCHandle.Alloc (node);
node_hash [node] = gch;
}
TreeIter result = TreeIter.Zero;
result.UserData = (IntPtr) gch;
return result;
}
object NodeFromIter (TreeIter iter)
{
GCHandle gch = (GCHandle) iter.UserData;
return gch.Target;
}
TreePath PathFromNode (object node)
{
if (node == null)
return new TreePath ();
object work = node;
TreePath path = new TreePath ();
if ((work is MemberInfo) && !(work is Type)) {
Type parent = (work as MemberInfo).ReflectedType;
path.PrependIndex (Array.IndexOf (parent.GetMembers (), work));
work = parent;
}
if (work is Type) {
Assembly assm = (work as Type).Assembly;
path.PrependIndex (Array.IndexOf (assm.GetTypes (), work));
work = assm;
}
if (work is Assembly) {
path.PrependIndex (Array.IndexOf (assemblies, work));
}
return path;
}
public bool GetIter (out TreeIter iter, TreePath path)
{
if (path == null)
throw new ArgumentNullException ("path");
iter = TreeIter.Zero;
object node = GetNodeAtPath (path);
if (node == null)
return false;
iter = IterFromNode (node);
return true;
}
public TreePath GetPath (TreeIter iter)
{
object node = NodeFromIter (iter);
if (node == null)
throw new ArgumentException ("iter");
return PathFromNode (node);
}
public void GetValue (TreeIter iter, int col, ref GLib.Value val)
{
object node = NodeFromIter (iter);
if (node == null)
return;
if (node is Assembly)
val = new GLib.Value (col == 0 ? (node as Assembly).GetName ().Name : "Assembly");
else if (node is Type)
val = new GLib.Value (col == 0 ? (node as Type).Name : "Type");
else
val = new GLib.Value (col == 0 ? (node as MemberInfo).Name : "Member");
}
public bool IterNext (ref TreeIter iter)
{
object node = NodeFromIter (iter);
if (node == null)
return false;
int idx;
if (node is Assembly) {
idx = Array.IndexOf (assemblies, node) + 1;
if (idx < assemblies.Length) {
iter = IterFromNode (assemblies [idx]);
return true;
}
} else if (node is Type) {
Type[] siblings = (node as Type).Assembly.GetTypes ();
idx = Array.IndexOf (siblings, node) + 1;
if (idx < siblings.Length) {
iter = IterFromNode (siblings [idx]);
return true;
}
} else {
MemberInfo[] siblings = (node as MemberInfo).ReflectedType.GetMembers ();
idx = Array.IndexOf (siblings, node) + 1;
if (idx < siblings.Length) {
iter = IterFromNode (siblings [idx]);
return true;
}
}
return false;
}
public bool IterPrevious (ref TreeIter iter)
{
object node = NodeFromIter (iter);
if (node == null)
return false;
int idx;
if (node is Assembly) {
idx = Array.IndexOf (assemblies, node) - 1;
if (idx >= 0) {
iter = IterFromNode (assemblies [idx]);
return true;
}
} else if (node is Type) {
Type[] siblings = (node as Type).Assembly.GetTypes ();
idx = Array.IndexOf (siblings, node) - 1;
if (idx >= 0) {
iter = IterFromNode (siblings [idx]);
return true;
}
} else {
MemberInfo[] siblings = (node as MemberInfo).ReflectedType.GetMembers ();
idx = Array.IndexOf (siblings, node) - 1;
if (idx >= 0) {
iter = IterFromNode (siblings [idx]);
return true;
}
}
return false;
}
int ChildCount (object node)
{
if (node is Assembly)
return (node as Assembly).GetTypes ().Length;
else if (node is Type)
return (node as Type).GetMembers ().Length;
else
return 0;
}
public bool IterChildren (out TreeIter child, TreeIter parent)
{
child = TreeIter.Zero;
if (parent.UserData == IntPtr.Zero) {
child = IterFromNode (assemblies [0]);
return true;
}
object node = NodeFromIter (parent);
if (node == null || ChildCount (node) <= 0)
return false;
if (node is Assembly)
child = IterFromNode ((node as Assembly).GetTypes () [0]);
else if (node is Type)
child = IterFromNode ((node as Type).GetMembers () [0]);
return true;
}
public bool IterHasChild (TreeIter iter)
{
object node = NodeFromIter (iter);
if (node == null || ChildCount (node) <= 0)
return false;
return true;
}
public int IterNChildren (TreeIter iter)
{
if (iter.UserData == IntPtr.Zero)
return assemblies.Length;
object node = NodeFromIter (iter);
if (node == null)
return 0;
return ChildCount (node);
}
public bool IterNthChild (out TreeIter child, TreeIter parent, int n)
{
child = TreeIter.Zero;
if (parent.UserData == IntPtr.Zero) {
if (assemblies.Length <= n)
return false;
child = IterFromNode (assemblies [n]);
return true;
}
object node = NodeFromIter (parent);
if (node == null || ChildCount (node) <= n)
return false;
if (node is Assembly)
child = IterFromNode ((node as Assembly).GetTypes () [n]);
else if (node is Type)
child = IterFromNode ((node as Type).GetMembers () [n]);
return true;
}
public bool IterParent (out TreeIter parent, TreeIter child)
{
parent = TreeIter.Zero;
object node = NodeFromIter (child);
if (node == null || node is Assembly)
return false;
if (node is Type)
parent = IterFromNode ((node as Type).Assembly);
else if (node is MemberInfo)
parent = IterFromNode ((node as MemberInfo).ReflectedType);
return true;
}
public void RefNode (TreeIter iter)
{
}
public void UnrefNode (TreeIter iter)
{
}
}
}