protected override void RestoreStateCore(IDataGridContextVisitable dataGridContextVisitable)
{
try
{
m_rootDataGridContext = SaveRestoreDataGridContextStateVisitor.GetDataGridContextFromVisitable(dataGridContextVisitable);
if (m_saveExpandedItems)
{
for (int i = 0; i < m_itemsToExpand.Count; i++)
{
object dataItemToExpand = m_itemsToExpand[i].Target;
if (dataItemToExpand != null)
{
try
{
// Verify if we have a System.Data.DataView as ItemsSource to
// ensure to restore the System.Data.DataRowView that represents
// the System.Data.DataRow saved previously
System.Data.DataView dataView =
ItemsSourceHelper.TryGetDataViewFromDataGridContext(m_rootDataGridContext);
if ((dataView != null) &&
(dataItemToExpand is System.Data.DataRow))
{
foreach (System.Data.DataRowView dataRowView in dataView)
{
if (dataRowView.Row == dataItemToExpand)
{
dataItemToExpand = dataRowView;
break;
}
}
}
m_rootDataGridContext.ExpandDetails(dataItemToExpand);
}
catch
{
System.Diagnostics.Debug.Assert(false, "Item has moved in the source ?");
}
}
}
}
bool visitWasStopped;
dataGridContextVisitable.AcceptVisitor(0, int.MaxValue, this, DataGridContextVisitorType.Groups, false, out visitWasStopped);
}
finally
{
m_itemsToExpand = null;
m_rootDataGridContext = null;
}
}
public void SaveState( IDataGridContextVisitable dataGridContextVisitable )
{
if( m_status != SaveRestoreStateVisitorStatus.Ready )
throw new InvalidOperationException( "An attempt was made to save the state of a visitor that is not ready." );
m_status = SaveRestoreStateVisitorStatus.Saving;
try
{
this.SaveStateCore( dataGridContextVisitable );
m_status = SaveRestoreStateVisitorStatus.RestorePending;
}
catch
{
m_status = SaveRestoreStateVisitorStatus.Error;
throw;
}
}
public static DataGridContext GetDataGridContextFromVisitable( IDataGridContextVisitable dataGridContextVisitable )
{
DataGridContext dataGridContext = dataGridContextVisitable as DataGridContext;
if( dataGridContext == null )
{
DataGridControl dataGridControl = dataGridContextVisitable as DataGridControl;
if( dataGridControl != null )
dataGridContext = dataGridControl.DataGridContext;
}
if( dataGridContext == null )
throw new InvalidOperationException( "A dataGridContext could not be extracted from the IDataGridContextVisitable object." );
return dataGridContext;
}
protected override void SaveStateCore(IDataGridContextVisitable dataGridContextVisitable)
{
try
{
bool visitWasStopped;
m_rootDataGridContext = SaveRestoreStateVisitor.GetDataGridContextFromVisitable(dataGridContextVisitable);
if (m_saveExpandedItems)
{
dataGridContextVisitable.AcceptVisitor(0, int.MaxValue, this, DataGridContextVisitorType.DataGridContext, true, out visitWasStopped);
}
dataGridContextVisitable.AcceptVisitor(0, int.MaxValue, this, DataGridContextVisitorType.Groups, false, out visitWasStopped);
}
finally
{
m_rootDataGridContext = null;
}
}
public void RestoreState(IDataGridContextVisitable dataGridContextVisitable)
{
if (m_status != SaveRestoreStateVisitorStatus.RestorePending)
{
throw new InvalidOperationException("An attempt was made to restore the state of a visitor that does not have a pending restorable state.");
}
m_status = SaveRestoreStateVisitorStatus.Restoring;
try
{
this.RestoreStateCore(dataGridContextVisitable);
m_status = SaveRestoreStateVisitorStatus.Restored;
}
catch
{
m_status = SaveRestoreStateVisitorStatus.Error;
throw;
}
}
public void SaveState(IDataGridContextVisitable dataGridContextVisitable)
{
if (m_status != SaveRestoreStateVisitorStatus.Ready)
{
throw new InvalidOperationException("An attempt was made to save the state of a visitor that is not ready.");
}
m_status = SaveRestoreStateVisitorStatus.Saving;
try
{
this.SaveStateCore(dataGridContextVisitable);
m_status = SaveRestoreStateVisitorStatus.RestorePending;
}
catch
{
m_status = SaveRestoreStateVisitorStatus.Error;
throw;
}
}
public static DataGridContext GetDataGridContextFromVisitable(IDataGridContextVisitable dataGridContextVisitable)
{
DataGridContext dataGridContext = dataGridContextVisitable as DataGridContext;
if (dataGridContext == null)
{
DataGridControl dataGridControl = dataGridContextVisitable as DataGridControl;
if (dataGridControl != null)
{
dataGridContext = dataGridControl.DataGridContext;
}
}
if (dataGridContext == null)
{
throw new InvalidOperationException("A dataGridContext could not be extracted from the IDataGridContextVisitable object.");
}
return(dataGridContext);
}
protected override void RestoreStateCore(IDataGridContextVisitable dataGridContextVisitable)
{
DataGridContext rootDataGridContext = SaveRestoreStateVisitor.GetDataGridContextFromVisitable(dataGridContextVisitable);
this.RecursiveRestoreDataGridContextsState(rootDataGridContext);
}
protected override void RestoreStateCore( IDataGridContextVisitable dataGridContextVisitable )
{
try
{
m_rootDataGridContext = SaveRestoreDataGridContextStateVisitor.GetDataGridContextFromVisitable( dataGridContextVisitable );
if( m_saveExpandedItems )
{
for( int i = 0; i < m_itemsToExpand.Count; i++ )
{
object dataItemToExpand = m_itemsToExpand[ i ].Target;
if( dataItemToExpand != null )
{
try
{
// Verify if we have a System.Data.DataView as ItemsSource to
// ensure to restore the System.Data.DataRowView that represents
// the System.Data.DataRow saved previously
System.Data.DataView dataView =
ItemsSourceHelper.TryGetDataViewFromDataGridContext( m_rootDataGridContext );
if( ( dataView != null )
&& ( dataItemToExpand is System.Data.DataRow ) )
{
foreach( System.Data.DataRowView dataRowView in dataView )
{
if( dataRowView.Row == dataItemToExpand )
{
dataItemToExpand = dataRowView;
break;
}
}
}
m_rootDataGridContext.ExpandDetails( dataItemToExpand );
}
catch
{
System.Diagnostics.Debug.Assert( false, "Item has moved in the source ?" );
}
}
}
}
bool visitWasStopped;
dataGridContextVisitable.AcceptVisitor( 0, int.MaxValue, this, DataGridContextVisitorType.Groups, false, out visitWasStopped );
}
finally
{
m_itemsToExpand = null;
m_rootDataGridContext = null;
}
}
protected override void SaveStateCore( IDataGridContextVisitable dataGridContextVisitable )
{
try
{
bool visitWasStopped;
m_rootDataGridContext = SaveRestoreStateVisitor.GetDataGridContextFromVisitable( dataGridContextVisitable );
if( m_saveExpandedItems )
dataGridContextVisitable.AcceptVisitor( 0, int.MaxValue, this, DataGridContextVisitorType.DataGridContext, true, out visitWasStopped );
dataGridContextVisitable.AcceptVisitor( 0, int.MaxValue, this, DataGridContextVisitorType.Groups, false, out visitWasStopped );
}
finally
{
m_rootDataGridContext = null;
}
}
protected abstract void RestoreStateCore(IDataGridContextVisitable dataGridContextVisitable);
public void RestoreState( IDataGridContextVisitable dataGridContextVisitable )
{
if( m_status != SaveRestoreStateVisitorStatus.RestorePending )
throw new InvalidOperationException( "An attempt was made to restore the state of a visitor that does not have a pending restorable state." );
m_status = SaveRestoreStateVisitorStatus.Restoring;
try
{
this.RestoreStateCore( dataGridContextVisitable );
m_status = SaveRestoreStateVisitorStatus.Restored;
}
catch
{
m_status = SaveRestoreStateVisitorStatus.Error;
throw;
}
}
protected abstract void RestoreStateCore( IDataGridContextVisitable dataGridContextVisitable );
protected override void RestoreStateCore( IDataGridContextVisitable dataGridContextVisitable )
{
DataGridContext rootDataGridContext = SaveRestoreStateVisitor.GetDataGridContextFromVisitable( dataGridContextVisitable );
this.RecursiveRestoreDataGridContextsState( rootDataGridContext );
}
