/// <summary>
/// Updates the Element Order in the list based on the drag drop parameters
/// </summary>
/// <param name="dataContext">List of CSTUserPreferenceInfo binded to the grid</param>
/// <param name="dragUserPreferenceInfo">CSTUserPreferenceInfo</param>
/// <param name="dropBenchmarkDetails">CSTUserPreferenceInfo</param>
private void UpdateParametersForSameGroupReordering(List <CSTUserPreferenceInfo> dataContext,
CSTUserPreferenceInfo dragUserPreferenceInfo, CSTUserPreferenceInfo dropUserPreferenceInfo, bool dropIndexExceedsCount)
{
//Check drop flow - top ot bottom or vice versa
bool dropLocationExceedsDragLocation = dropUserPreferenceInfo.DataPointsOrder > dragUserPreferenceInfo.DataPointsOrder;
foreach (CSTUserPreferenceInfo record in dataContext)
{
// check if the record is between drag and drop location
bool recordIsBetweenDragDropLocation;
if (dropIndexExceedsCount)
{
recordIsBetweenDragDropLocation = dropLocationExceedsDragLocation
? record.DataPointsOrder > dragUserPreferenceInfo.DataPointsOrder &&
record.DataPointsOrder <= dropUserPreferenceInfo.DataPointsOrder
: record.DataPointsOrder < dragUserPreferenceInfo.DataPointsOrder &&
record.DataPointsOrder >= dropUserPreferenceInfo.DataPointsOrder;
}
else
{
recordIsBetweenDragDropLocation = dropLocationExceedsDragLocation
? record.DataPointsOrder > dragUserPreferenceInfo.DataPointsOrder &&
record.DataPointsOrder < dropUserPreferenceInfo.DataPointsOrder
: record.DataPointsOrder < dragUserPreferenceInfo.DataPointsOrder &&
record.DataPointsOrder >= dropUserPreferenceInfo.DataPointsOrder;
}
// shift record order between drag and drop location based on drop flow
if (recordIsBetweenDragDropLocation)
{
record.DataPointsOrder = dropLocationExceedsDragLocation
? record.DataPointsOrder - 1
: record.DataPointsOrder + 1;
continue;
}
// check if the record is the drag element
bool recordIsDragLocation = record.DataPointsOrder == dragUserPreferenceInfo.DataPointsOrder;
// change record order if the record element is the drag element
if (recordIsDragLocation)
{
if (dropIndexExceedsCount)
{
record.DataPointsOrder = dropUserPreferenceInfo.DataPointsOrder;
}
else
{
record.DataPointsOrder = dropLocationExceedsDragLocation
? dropUserPreferenceInfo.DataPointsOrder - 1
: dropUserPreferenceInfo.DataPointsOrder;
}
}
}
}
/// <summary>
/// ReorderBehavior Reordering Event Handler - Adjusts Entity Order and GroupPreferenceId of entities after reordering
/// </summary>
/// <param name="sender">Sender</param>
/// <param name="e">ReorderingEventArgs</param>
private void ReorderBehavior_Reordering(object sender, ReorderingEventArgs e)
{
// if there are no dragged Items reordering is redundant
if (e.DraggedItems.Count().Equals(0))
{
return;
}
#region Get Dragged Element
// dragged Element
CSTUserPreferenceInfo draggedElement = e.DraggedItems.FirstOrDefault() as CSTUserPreferenceInfo;
// null Exception Handling
if (draggedElement == null)
{
return;
}
#endregion
#region Get Data Context
// collection of CSTUserPreferenceInfo binded to the grid
List <CSTUserPreferenceInfo> dataContext = (e.SourceGrid.ItemsSource as ObservableCollection <CSTUserPreferenceInfo>).ToList();
// null Exception Handling
if (dataContext == null)
{
return;
}
#endregion
#region Get Drag Drop Details
// drag Drop Indexes
int dragIndex = dataContext.IndexOf(draggedElement);
int dropIndex = e.DropIndex;
// true if insertion is done after an element and False if it's done before the element
bool dropPositionIsAfter = DragDropPosition.Value == DropPosition.After;
// check if the drop Index exceed the Count of List - item dropped after the last element
bool dropIndexExceedsCount = dropIndex >= dataContext.Count;
#endregion
#region Drag Location Parameters
CSTUserPreferenceInfo dragUserPreferenceInfo = new CSTUserPreferenceInfo()
{
ScreeningId = dataContext.ElementAt(dragIndex).ScreeningId,
DataDescription = dataContext.ElementAt(dragIndex).DataDescription,
UserName = UserSession.SessionManager.SESSION.UserName,
ListName = dataContext.ElementAt(dragIndex).ListName,
Accessibility = dataContext.ElementAt(dragIndex).Accessibility,
DataPointsOrder = dataContext.ElementAt(dragIndex).DataPointsOrder,
TableColumn = dataContext.ElementAt(dragIndex).TableColumn
};
#endregion
#region Drop Location Parameters
CSTUserPreferenceInfo dropUserPreferenceInfo = new CSTUserPreferenceInfo()
{
ScreeningId = dropIndexExceedsCount ? null : dataContext.ElementAt(dropIndex).ScreeningId,
DataDescription = dropIndexExceedsCount ? null : dataContext.ElementAt(e.DropIndex).DataDescription,
UserName = UserSession.SessionManager.SESSION.UserName,
ListName = dataContext.ElementAt(dragIndex).ListName,
Accessibility = dataContext.ElementAt(dragIndex).Accessibility,
DataPointsOrder = dropIndexExceedsCount ? dataContext.ElementAt(dropIndex - 1).DataPointsOrder
: dataContext.ElementAt(dropIndex).DataPointsOrder,
TableColumn = dataContext.ElementAt(dragIndex).TableColumn
};
#endregion
// update the data points order of list
UpdateParametersForSameGroupReordering(dataContext, dragUserPreferenceInfo, dropUserPreferenceInfo, dropIndexExceedsCount);
}
