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// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
// Copyright (c) 2004-2005 Novell, Inc.
//
// Authors:
// Peter Bartok pbartok@novell.com
// Jackson Harper jackson@ximian.com
//
// NOT COMPLETE
using System.ComponentModel;
using System.Collections;
namespace System.Windows.Forms
{
public abstract class BindingManagerBase
{
private BindingsCollection bindings;
internal bool transfering_data; /* true if we're pushing or pulling data */
#region Public Constructors
public BindingManagerBase()
{
}
#endregion // Public Constructors
#region Protected Instance Fields
protected EventHandler onCurrentChangedHandler;
protected EventHandler onPositionChangedHandler;
internal EventHandler onCurrentItemChangedHandler;
#endregion // Protected Instance Fields
#region Public Instance Properties
public BindingsCollection Bindings {
get {
if (bindings == null) {
bindings = new BindingsCollection ();
}
return bindings;
}
}
public abstract int Count {
get;
}
public abstract object Current {
get;
}
public bool IsBindingSuspended {
get {
return IsSuspended;
}
}
public abstract int Position {
get; set;
}
#endregion // Public Instance Properties
#region Public Instance Methods
public abstract void AddNew();
public abstract void CancelCurrentEdit();
public abstract void EndCurrentEdit();
public virtual PropertyDescriptorCollection GetItemProperties()
{
return GetItemPropertiesInternal ();
}
internal virtual PropertyDescriptorCollection GetItemPropertiesInternal ()
{
throw new NotImplementedException ();
}
public abstract void RemoveAt(int index);
public abstract void ResumeBinding();
public abstract void SuspendBinding();
#endregion // Public Instance Methods
internal virtual bool IsSuspended {
get {
return false;
}
}
#region Protected Instance Methods
[MonoTODO ("Not implemented, will throw NotImplementedException")]
protected internal virtual PropertyDescriptorCollection GetItemProperties (ArrayList dataSources, ArrayList listAccessors)
{
throw new NotImplementedException();
}
[MonoTODO ("Not implemented, will throw NotImplementedException")]
protected virtual PropertyDescriptorCollection GetItemProperties (Type listType, int offset, ArrayList dataSources, ArrayList listAccessors)
{
throw new NotImplementedException();
}
protected internal abstract string GetListName (ArrayList listAccessors);
protected internal abstract void OnCurrentChanged (EventArgs e);
protected void PullData()
{
try {
if (!transfering_data) {
transfering_data = true;
UpdateIsBinding ();
}
foreach (Binding binding in Bindings) {
binding.PullData ();
}
} finally {
transfering_data = false;
}
}
protected void PushData()
{
try {
if (!transfering_data) {
transfering_data = true;
UpdateIsBinding ();
}
foreach (Binding binding in Bindings) {
binding.PushData ();
}
} finally {
transfering_data = false;
}
}
protected void OnBindingComplete (BindingCompleteEventArgs args)
{
if (BindingComplete != null)
BindingComplete (this, args);
}
protected abstract void OnCurrentItemChanged (EventArgs e);
protected void OnDataError (Exception e)
{
if (DataError != null)
DataError (this, new BindingManagerDataErrorEventArgs (e));
}
protected abstract void UpdateIsBinding();
#endregion // Protected Instance Methods
internal void AddBinding (Binding binding)
{
if (Bindings.Contains (binding))
return;
Bindings.Add (binding);
}
#region Events
public event EventHandler CurrentChanged {
add { onCurrentChangedHandler += value; }
remove { onCurrentChangedHandler -= value; }
}
public event EventHandler PositionChanged {
add { onPositionChangedHandler += value; }
remove { onPositionChangedHandler -= value; }
}
public event EventHandler CurrentItemChanged {
add { onCurrentItemChangedHandler += value; }
remove { onCurrentItemChangedHandler -= value; }
}
public event BindingCompleteEventHandler BindingComplete;
public event BindingManagerDataErrorEventHandler DataError;
#endregion // Events
}
}
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