private void DeepCopy(Note source, Note destination)
{
//use properties where possible, to raise PropertyChanged events.
destination.StartTime = source.StartTime;
destination.StartTrackNumber = source.StartTrackNumber;
destination.EndTime = source.EndTime;
destination.EndTrackNumber = source.EndTrackNumber;
destination.Title = source.Title;
destination.Body = source.Body;
destination.Rating = source.Rating;
destination.Tags = new ObservableCollection<Tag>(source.Tags);
}
//
// Summary:
// Pushes changes since the last System.ComponentModel.IEditableObject.BeginEdit()
// or System.ComponentModel.IBindingList.AddNew() call into the underlying object.
public virtual void EndEdit()
{
//JDW: DataGrid control calls CancelEdit twice. this is known datagrid behaviour. ref: http://stackoverflow.com/questions/4450878/wpf-datagrid-calls-beginedit-on-an-ieditableobject-two-times
if (IsDirty)
{
//ensure we clear the 'IsDirty' flag first, so we can correctly detect whether the note needs saving.
this.IsDirty = false;
if (null != ChangeCommitted)
{
ChangeCommitted(this, new EventArgs());
}
_versionBeforeEdit = null;
}
}
public virtual void CancelEdit()
{
//JDW: DataGrid control calls CancelEdit twice. this is known datagrid behaviour. ref: http://stackoverflow.com/questions/4450878/wpf-datagrid-calls-beginedit-on-an-ieditableobject-two-times
if (IsDirty)
{
//revert all changes. use the tracked properties where possible, to raise PropertyChanged events.
//NOTE: for reference members, this will always send out PropertyChanged events (since we cloned them, they're difference objects)
DeepCopy(_versionBeforeEdit, this);
_versionBeforeEdit = null;
this.IsDirty = false;
}
}
public virtual object Clone()
{
Note clone = new Note();
DeepCopy(this, clone);
return clone;
}
// Summary:
// Begins an edit on an object.
public virtual void BeginEdit()
{
//JDW: DataGrid control calls BeginEdit twice. this is known datagrid behaviour. ref: http://stackoverflow.com/questions/4450878/wpf-datagrid-calls-beginedit-on-an-ieditableobject-two-times
if (false == IsDirty)
{
IsDirty = true;
_versionBeforeEdit = (Note)this.Clone();
}
}