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//
// DataGrid - attempt at creating a DataGrid for GTK#
// using a GTK# TreeView. The goal is to have similar
// functionality to a System.Windows.Forms.DataGrid
// or System.Web.UI.WebControls.DataGrid. This includes
// data binding support.
//
// Based on the sample/TreeViewDemo.cs
//
// Author: Kristian Rietveld <kris@gtk.org>
// Daniel Morgan <danmorg@sc.rr.com>
//
// (c) 2002 Kristian Rietveld
// (c) 2002 Daniel Morgan
//
namespace Gtk.Controls
{
using System;
using System.Collections;
using System.ComponentModel;
using System.Drawing;
using System.Reflection;
using System.Text;
using GLib;
using Gtk;
using GtkSharp;
using System.Runtime.InteropServices;
public class DataGridColumn
{
private string columnName = "";
private TreeViewColumn treeViewColumn = null;
public string ColumnName {
get {
return columnName;
}
set {
columnName = value;
}
}
public TreeViewColumn TreeViewColumn {
get {
return treeViewColumn;
}
set {
treeViewColumn = value;
}
}
}
public class DataGrid : VBox
{
private ListStore store = null;
private TreeView treeView = null;
public DataGridColumn[] gridColumns = null;
public DataGrid () : base(false, 4)
{
ScrolledWindow sw = new ScrolledWindow ();
this.PackStart (sw, true, true, 0);
treeView = new TreeView (store);
treeView.HeadersVisible = true;
sw.Add (treeView);
}
// FIXME: need to place in a base class
// the DataSource, DataMember, DataBind()
// public members.
// maybe we can call the base class
// BaseDataList for GTK#?
private object dataSource = null;
private string dataMember = "";
public object DataSource {
get {
return dataSource;
}
set {
dataSource = value;
}
}
public string DataMember {
get {
return dataMember;
}
set {
dataMember = value;
}
}
public void DataBind ()
{
Clear ();
System.Object o = null;
o = GetResolvedDataSource (DataSource, DataMember);
IEnumerable ie = (IEnumerable) o;
ITypedList tlist = (ITypedList) o;
// FIXME: does not belong in this base method
TreeIter iter = new TreeIter ();
PropertyDescriptorCollection pdc = tlist.GetItemProperties (new PropertyDescriptor[0]);
// FIXME: does not belong in this base method
gridColumns = new DataGridColumn[pdc.Count];
// FIXME: does not belong in base method
// define the columns in the treeview store
// based on the schema of the result
int[] theTypes = new int[pdc.Count];
for (int col = 0; col < pdc.Count; col++) {
theTypes[col] = (int) TypeFundamentals.TypeString;
}
store.SetColumnTypes (theTypes);
// FIXME: does not belong in this base method
int colndx = -1;
foreach (PropertyDescriptor pd in pdc) {
colndx ++;
gridColumns[colndx] = new DataGridColumn ();
gridColumns[colndx].ColumnName = pd.Name;
}
foreach (System.Object obj in ie) {
ICustomTypeDescriptor custom = (ICustomTypeDescriptor) obj;
PropertyDescriptorCollection properties;
properties = custom.GetProperties ();
iter = NewRow ();
int cv = 0;
foreach (PropertyDescriptor property in properties) {
object oPropValue = property.GetValue (obj);
string sPropValue = oPropValue.ToString ();
// FIXME: does not belong in this base method
SetColumnValue (iter, cv, sPropValue);
cv++;
}
}
// FIXME: does not belong in this base method
treeView.Model = store;
AutoCreateTreeViewColumns (treeView);
}
// borrowed from Mono's System.Web implementation
protected IEnumerable GetResolvedDataSource(object source, string member)
{
if (source != null && source is IListSource) {
IListSource src = (IListSource) source;
IList list = src.GetList ();
if (!src.ContainsListCollection) {
return list;
}
if (list != null && list is ITypedList) {
ITypedList tlist = (ITypedList) list;
PropertyDescriptorCollection pdc = tlist.GetItemProperties (new PropertyDescriptor[0]);
if (pdc != null && pdc.Count > 0) {
PropertyDescriptor pd = null;
if (member != null && member.Length > 0) {
pd = pdc.Find (member, true);
} else {
pd = pdc[0];
}
if (pd != null) {
object rv = pd.GetValue (list[0]);
if (rv != null && rv is IEnumerable) {
return (IEnumerable)rv;
}
}
throw new Exception ("ListSource_Missing_DataMember");
}
throw new Exception ("ListSource_Without_DataMembers");
}
}
if (source is IEnumerable) {
return (IEnumerable)source;
}
return null;
}
public void Clear ()
{
if (store != null) {
store.Clear ();
store = null;
store = new ListStore ((int)TypeFundamentals.TypeString);
}
else
store = new ListStore ((int)TypeFundamentals.TypeString);
if (gridColumns != null) {
for (int c = 0; c < gridColumns.Length; c++) {
if (gridColumns[c] != null) {
if (gridColumns[c].TreeViewColumn != null) {
treeView.RemoveColumn (gridColumns[c].TreeViewColumn);
gridColumns[c].TreeViewColumn = null;
}
gridColumns[c] = null;
}
}
gridColumns = null;
}
}
// for DEBUG only
public void AppendText (string text)
{
Console.WriteLine ("DataGrid DEBUG: " + text);
Console.Out.Flush ();
}
public TreeIter NewRow ()
{
TreeIter rowTreeIter = new TreeIter();
store.Append (out rowTreeIter);
return rowTreeIter;
}
public void AddRow (object[] columnValues)
{
TreeIter iter = NewRow ();
for(int col = 0; col < columnValues.Length; col++) {
string cellValue = columnValues[col].ToString ();
SetColumnValue (iter, col, cellValue);
}
}
public void SetColumnValue (TreeIter iter, int column, string value)
{
GLib.Value cell = new GLib.Value (value);
store.SetValue (iter, column, cell);
}
private void AutoCreateTreeViewColumns (TreeView theTreeView)
{
for(int col = 0; col < gridColumns.Length; col++) {
// escape underscore _ because it is used
// as the underline in menus and labels
StringBuilder name = new StringBuilder ();
foreach (char ch in gridColumns[col].ColumnName) {
if (ch == '_')
name.Append ("__");
else
name.Append (ch);
}
TreeViewColumn tvc;
tvc = CreateColumn (theTreeView, col,
name.ToString ());
theTreeView.AppendColumn (tvc);
}
}
// TODO: maybe need to create
// a DataGridColumnCollection of DataGridColumn
// and a DataGridColumn contain a TreeViewColumn
public TreeViewColumn CreateColumn (TreeView theTreeView, int col,
string columnName)
{
TreeViewColumn NameCol = new TreeViewColumn ();
CellRenderer NameRenderer = new CellRendererText ();
NameCol.Title = columnName;
NameCol.PackStart (NameRenderer, true);
NameCol.AddAttribute (NameRenderer, "text", col);
gridColumns[col].TreeViewColumn = NameCol;
return NameCol;
}
}
}
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