internal void ShowFarDropMark(Point mousePosition)
{
int itemsCount = this.Items.Count;
if (itemsCount < 1)
{
if (m_dropMarkAdorner == null)
{
DataGridContext dataGridContext = DataGridControl.GetDataGridContext(this);
DataGridControl grid = (dataGridContext != null)
? dataGridContext.DataGridControl
: null;
Pen pen = UIViewBase.GetDropMarkPen(this);
if ((pen == null) && (grid != null))
{
UIViewBase uiViewBase = grid.GetView() as UIViewBase;
pen = uiViewBase.DefaultDropMarkPen;
}
DropMarkOrientation orientation = UIViewBase.GetDropMarkOrientation(this);
if ((orientation == DropMarkOrientation.Default) && (grid != null))
{
UIViewBase uiViewBase = grid.GetView() as UIViewBase;
orientation = uiViewBase.DefaultDropMarkOrientation;
}
m_dropMarkAdorner = new DropMarkAdorner(this, pen, orientation);
AdornerLayer adornerLayer = AdornerLayer.GetAdornerLayer(this);
if (adornerLayer != null)
{
adornerLayer.Add(m_dropMarkAdorner);
}
}
// We Only want the drop mark to be displayed at the end of the HierarchicalGroupByControlNode
m_dropMarkAdorner.ForceAlignment(DropMarkAlignment.Far);
}
else
{
HierarchicalGroupByItem hierarchicalGroupByItem = this.ItemContainerGenerator.ContainerFromIndex(itemsCount - 1) as HierarchicalGroupByItem;
Debug.Assert(hierarchicalGroupByItem != null);
GroupLevelDescription groupLevelDescription = hierarchicalGroupByItem.Content as GroupLevelDescription;
Debug.Assert(groupLevelDescription != null);
// Show Far DropMark only if not already grouped
if (this.Items.Contains(groupLevelDescription) == false)
{
hierarchicalGroupByItem.ShowFarDropMark(mousePosition);
}
}
}
protected override void OnMouseLeftButtonUp(MouseButtonEventArgs e)
{
bool isMouseCaptured = this.IsMouseCaptured;
bool isPressed = this.IsPressed;
if (m_dragSourceManager != null)
{
m_dragSourceManager.ProcessMouseLeftButtonUp(e);
}
if (isMouseCaptured)
{
bool click = isPressed;
if (click)
{
bool allowSort = true;
GroupByControl parentGBC = this.GetParentGroupByControl();
if (parentGBC != null)
{
allowSort = parentGBC.AllowSort;
}
if (allowSort)
{
DataGridContext dataGridContext = DataGridControl.GetDataGridContext(this);
GroupLevelDescription groupInfo = this.Content as GroupLevelDescription;
Debug.Assert((dataGridContext != null) && (groupInfo != null));
if ((dataGridContext != null) && (groupInfo != null))
{
ColumnBase column = dataGridContext.Columns[groupInfo.FieldName];
if ((column != null) && (column.AllowSort))
{
bool shiftUnpressed = ((Keyboard.Modifiers & ModifierKeys.Shift) != ModifierKeys.Shift);
var toggleColumnSort = dataGridContext.ToggleColumnSortCommand;
if (toggleColumnSort.CanExecute(column, shiftUnpressed))
{
toggleColumnSort.Execute(column, shiftUnpressed);
}
e.Handled = true;
}
}
}
}
}
base.OnMouseLeftButtonUp(e);
}
private bool TryGetGroupLevelDescription(out GroupLevelDescription result)
{
result = m_groupLevelDescription;
if (result != null)
{
return(true);
}
m_raiseEventOnGroupLevelDescriptionFound = true;
return(false);
}
private void DragSourceManager_DroppedOutside(object sender, EventArgs e)
{
HierarchicalGroupByControlNode hierarchicalGroupByControlNode = HierarchicalGroupByItem.GetParentHierarchicalGroupByControlNode(this);
if (hierarchicalGroupByControlNode == null)
{
throw new DataGridInternalException("hierarchicalGroupByControlNode is null.");
}
bool allowGroupingModification = hierarchicalGroupByControlNode.IsGroupingModificationAllowed;
if (!allowGroupingModification)
{
return;
}
ObservableCollection <GroupDescription> groupDescriptions = this.ParentGroupDescriptions;
if (groupDescriptions != null)
{
// Get the HierarchicalGroupByControl before removing us from it
HierarchicalGroupByControl parentGBC = GroupingHelper.GetHierarchicalGroupByControl(this);
GroupLevelDescription groupLevelDescription = this.Content as GroupLevelDescription;
DataGridContext dataGridContext = DataGridControl.GetDataGridContext(this);
DataGridControl parentDataGridControl = (dataGridContext != null)
? dataGridContext.DataGridControl
: null;
GroupingHelper.RemoveGroupDescription(groupDescriptions, groupLevelDescription, parentDataGridControl);
// Notify groups have changed for NoGroupContent
parentGBC.UpdateHasGroups();
// Update the HasGroups property
Debug.Assert(parentGBC != null);
if (parentGBC == null)
{
throw new DataGridInternalException("The hierarchical group-by item must be rooted by a HierarchicalGroupByControl.");
}
}
}
void IDropTarget.Drop(UIElement draggedElement)
{
if (m_dropMarkAdorner != null)
{
DataGridContext dataGridContext = DataGridControl.GetDataGridContext(this);
Debug.Assert(dataGridContext != null);
if (dataGridContext != null)
{
GroupLevelDescription draggedOverGroupLevelDescription = this.Content as GroupLevelDescription;
Debug.Assert(draggedOverGroupLevelDescription != null);
if (draggedOverGroupLevelDescription != null)
{
DropMarkAlignment alignment = m_dropMarkAdorner.Alignment;
this.HideDropMark();
ColumnManagerCell draggedCell = draggedElement as ColumnManagerCell;
if (draggedCell != null)
{
GroupingHelper.AddNewGroupFromColumnManagerCell(draggedCell, draggedOverGroupLevelDescription, alignment, dataGridContext.DataGridControl);
}
else
{
GroupByItem draggedGroupBy = draggedElement as GroupByItem;
Debug.Assert(draggedGroupBy != null);
if (draggedGroupBy != null)
{
GroupLevelDescription draggedGroupLevelDescription = draggedGroupBy.Content as GroupLevelDescription;
GroupingHelper.MoveGroupDescription(dataGridContext.Columns, dataGridContext.Items.GroupDescriptions, draggedOverGroupLevelDescription, alignment, draggedGroupLevelDescription, dataGridContext.DataGridControl);
}
}
}
}
}
}
private void InitSortDirection()
{
ColumnCollection columns = this.ParentColumns;
GroupLevelDescription groupInfo = this.Content as GroupLevelDescription;
Debug.Assert((columns != null) && (groupInfo != null) || (DesignerProperties.GetIsInDesignMode(this)));
if ((columns != null) && (groupInfo != null))
{
ColumnBase column = columns[groupInfo.FieldName];
if (column != null)
{
Binding sortBinding = new Binding();
sortBinding.Path = new PropertyPath(ColumnBase.SortDirectionProperty);
sortBinding.Mode = BindingMode.OneWay;
sortBinding.NotifyOnSourceUpdated = true;
sortBinding.Source = column;
sortBinding.UpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged;
BindingOperations.SetBinding(this, HierarchicalGroupByItem.SortDirectionInternalProperty, sortBinding);
}
}
}
public static void AddNewGroupFromColumnManagerCell(ColumnManagerCell cell, GroupLevelDescription draggedOverDescription, DropMarkAlignment alignment, DataGridControl parentDataGridControl)
{
if (cell == null)
{
return;
}
DataGridContext dataGridContext = DataGridControl.GetDataGridContext(cell);
ColumnBase column = cell.ParentColumn;
if ((dataGridContext == null) ||
(parentDataGridControl == null) ||
(column == null) ||
(parentDataGridControl != dataGridContext.DataGridControl))
{
return;
}
var addGroupCommand = dataGridContext.AddGroupCommand;
if (draggedOverDescription != null)
{
var position = GroupingHelper.GetGroupDescriptionIndexFromFieldName(dataGridContext, draggedOverDescription.FieldName, alignment);
if (addGroupCommand.CanExecute(column, position))
{
addGroupCommand.Execute(column, position);
}
}
else
{
if (addGroupCommand.CanExecute(column))
{
addGroupCommand.Execute(column);
}
}
}
void IDropTarget.Drop(UIElement draggedElement)
{
ColumnManagerCell draggedColumnManagerCell = draggedElement as ColumnManagerCell;
if (m_dropMarkAdorner != null)
{
GroupLevelDescription draggedOverGroupLevelDescription = this.Content as GroupLevelDescription;
DropMarkAlignment alignment = m_dropMarkAdorner.Alignment;
this.HideDropMark();
if (draggedColumnManagerCell != null)
{
DataGridContext dataGridContext = DataGridControl.GetDataGridContext(this);
DataGridControl parentGrid = (dataGridContext != null)
? dataGridContext.DataGridControl
: null;
GroupingHelper.AddNewGroupFromColumnManagerCell(draggedColumnManagerCell, draggedOverGroupLevelDescription, alignment, parentGrid);
}
else
{
HierarchicalGroupByItem draggedGroupByItem = draggedElement as HierarchicalGroupByItem;
if (draggedGroupByItem == null)
{
return;
}
GroupLevelDescription draggedGroupLevelDescription = draggedGroupByItem.Content as GroupLevelDescription;
DataGridContext dataGridContext = DataGridControl.GetDataGridContext(this);
DataGridControl parentDataGridControl = (dataGridContext != null)
? dataGridContext.DataGridControl
: null;
GroupLevelDescription destinationGroupLevelDescription = this.Content as GroupLevelDescription;
GroupingHelper.MoveGroupDescription(this.ParentColumns, this.ParentGroupDescriptions,
destinationGroupLevelDescription, alignment,
draggedGroupLevelDescription, parentDataGridControl);
}
}
else
{
// We try to add a new Group which is not in the current GroupLevelDescriptions
if (draggedColumnManagerCell == null)
{
return;
}
DataGridContext dataGridContext = DataGridControl.GetDataGridContext(this);
DataGridControl parentGrid = (dataGridContext != null)
? dataGridContext.DataGridControl
: null;
GroupingHelper.AppendNewGroupFromColumnManagerCell(draggedColumnManagerCell, parentGrid);
}
HierarchicalGroupByControl parentGBC = GroupingHelper.GetHierarchicalGroupByControl(this);
Debug.Assert(parentGBC != null);
if (parentGBC == null)
{
throw new DataGridInternalException("A hierarchical group-by item must be rooted by a HierarchicalGroupByControl.");
}
// Notify groups have changed for NoGroupContent
parentGBC.UpdateHasGroups();
}
protected override void OnMouseLeftButtonUp(MouseButtonEventArgs e)
{
bool isMouseCaptured = this.IsMouseCaptured;
bool isPressed = this.IsPressed;
if (m_dragSourceManager != null)
{
m_dragSourceManager.ProcessMouseLeftButtonUp(e);
}
if (isMouseCaptured)
{
bool click = isPressed;
if (click)
{
// DataGridCollectionView always return true for CanSort
bool allowSort = true;
// Use the ParentDataGridContext to be sure to get a
// DataGridContext of the correct detail level since
// all the HierarchicalGroupByItem will share the same DataGridContext
// which is the one of the level where the HierarchicalGroupByControl
// is located
DataGridContext dataGridContext = this.ParentDataGridContext;
if ((dataGridContext != null) && (dataGridContext.SourceDetailConfiguration == null))
{
allowSort = dataGridContext.Items.CanSort;
}
if (allowSort)
{
ColumnCollection columns = this.ParentColumns;
GroupLevelDescription groupInfo = this.Content as GroupLevelDescription;
Debug.Assert((columns != null) && (groupInfo != null));
if ((columns != null) && (groupInfo != null))
{
ColumnBase column = columns[groupInfo.FieldName];
if ((column != null) && (column.AllowSort))
{
bool shiftUnpressed = ((Keyboard.Modifiers & ModifierKeys.Shift) != ModifierKeys.Shift);
var toggleColumnSort = new HierarchicalGroupByItemToggleColumnSortCommand(this);
if (toggleColumnSort.CanExecute(column, shiftUnpressed))
{
toggleColumnSort.Execute(column, shiftUnpressed);
}
e.Handled = true;
}
}
}
}
}
base.OnMouseLeftButtonUp(e);
}
internal HierarchicalGroupByControlNode GetHierarchicalGroupByControlNodeFromHierarchicalGroupByItem(HierarchicalGroupByItem hierarchicalGroupByItem)
{
Debug.Assert(hierarchicalGroupByItem != null);
if (hierarchicalGroupByItem == null)
{
return(null);
}
TreeView treeView = this.GetTemplateChild(@"PART_HierarchicalGroupByControlTreeView") as TreeView;
if (treeView == null)
{
return(null);
}
if (treeView.Items.Count == 0)
{
throw new DataGridInternalException("The HierarchicalGroupByControl should contain at least one grouping level.");
}
// The first item is always the top level HierarchicalGroupByControlNode
TreeViewItem rootItem = treeView.ItemContainerGenerator.ContainerFromItem(treeView.Items[0]) as TreeViewItem;
if (rootItem == null)
{
throw new DataGridInternalException("The root item is null.");
}
GroupLevelDescription detailGroupLevelDescription = hierarchicalGroupByItem.Content as GroupLevelDescription;
Debug.Assert(detailGroupLevelDescription != null);
TreeViewItem dropMarkedTreeViewItem = null;
DataGridContext rootDataGridContext = rootItem.Header as DataGridContext;
Debug.Assert(rootDataGridContext != null);
if (rootDataGridContext.GroupLevelDescriptions.Contains(detailGroupLevelDescription))
{
dropMarkedTreeViewItem = rootItem;
}
else
{
dropMarkedTreeViewItem = HierarchicalGroupByControl.GetTreeViewItemFromGroupLevelDescription(rootItem, detailGroupLevelDescription);
}
// If null, it means the cell does not belong to this detail
if (dropMarkedTreeViewItem == null)
{
return(null);
}
ContentPresenter treeViewItemHeader = dropMarkedTreeViewItem.Template.FindName("PART_Header", dropMarkedTreeViewItem) as ContentPresenter;
Debug.Assert(treeViewItemHeader != null);
if (treeViewItemHeader == null)
{
throw new DataGridInternalException("An error occurred while retrieving the PART_Header template part of an item containing a HierarchicalGroupByControlNode.");
}
HierarchicalGroupByControlNode hierarchicalGroupByControlNode = HierarchicalGroupByControl.GetHierarchicalGroupByControlNode(treeViewItemHeader);
return(hierarchicalGroupByControlNode);
}
private static TreeViewItem GetTreeViewItemFromGroupLevelDescription(TreeViewItem rootItem, GroupLevelDescription groupLevelDescription)
{
TreeViewItem returned = null;
Debug.Assert(rootItem != null);
Debug.Assert(groupLevelDescription != null);
if (rootItem == null)
{
throw new DataGridInternalException("rootItem is null.");
}
foreach (object item in rootItem.Items)
{
TreeViewItem child = rootItem.ItemContainerGenerator.ContainerFromItem(item) as TreeViewItem;
Debug.Assert(child != null);
if (child == null)
{
throw new DataGridInternalException("An item does not contain a valid item.");
}
DetailConfiguration detailConfiguration = child.Header as DetailConfiguration;
if (detailConfiguration == null)
{
throw new DataGridInternalException("An item's DataContext must be a DetailConfiguration except for the top-most HierarchicalGroupByControl, which contains a DataGridContext.");
}
if (detailConfiguration.GroupLevelDescriptions.Contains(groupLevelDescription))
{
returned = child;
break;
}
returned = HierarchicalGroupByControl.GetTreeViewItemFromGroupLevelDescription(child, groupLevelDescription);
if (returned != null)
{
break;
}
}
return(returned);
}
public static void RemoveGroupDescription(ObservableCollection <GroupDescription> groupDescriptions, GroupLevelDescription groupLevelDescription, DataGridControl parentDataGridControl)
{
if ((groupLevelDescription == null) ||
(parentDataGridControl == null))
{
return;
}
using (parentDataGridControl.SetQueueBringIntoViewRestrictions(AutoScrollCurrentItemSourceTriggers.CollectionViewCurrentItemChanged))
{
groupDescriptions.Remove(groupLevelDescription.GroupDescription);
}
}
public static void MoveGroupDescription(ColumnCollection targetColumns, ObservableCollection <GroupDescription> targetGroupDescriptions, GroupLevelDescription targetGroupLevelDescription, DropMarkAlignment targetAlignment, GroupLevelDescription movedGroupLevelDescription, DataGridControl parentDataGridControl)
{
Debug.Assert(targetColumns != null);
Debug.Assert(targetGroupDescriptions != null);
Debug.Assert(targetGroupLevelDescription != null);
Debug.Assert(movedGroupLevelDescription != null);
if ((parentDataGridControl == null) ||
(targetColumns == null) ||
(targetGroupDescriptions == null) ||
(targetGroupLevelDescription == null) ||
(movedGroupLevelDescription == null))
{
return;
}
int oldPos = GroupingHelper.GetGroupDescriptionIndex(targetGroupDescriptions, movedGroupLevelDescription, DropMarkAlignment.Near);
int newPos = GroupingHelper.GetGroupDescriptionIndex(targetGroupDescriptions, targetGroupLevelDescription, targetAlignment);
if (newPos > oldPos)
{
newPos--;
}
if (newPos != oldPos)
{
Debug.Assert(oldPos < targetGroupDescriptions.Count);
using (parentDataGridControl.SetQueueBringIntoViewRestrictions(AutoScrollCurrentItemSourceTriggers.CollectionViewCurrentItemChanged))
{
targetGroupDescriptions.Move(oldPos, newPos);
}
}
}
public static int GetGroupDescriptionIndex(ObservableCollection <GroupDescription> groupDescriptions, GroupLevelDescription groupLevelDescription, DropMarkAlignment alignment)
{
int groupIndex = groupDescriptions.IndexOf(groupLevelDescription.GroupDescription);
if (groupIndex > -1)
{
if (alignment == DropMarkAlignment.Far)
{
groupIndex++;
}
return(groupIndex);
}
else
{
// return the size of the Collection if not found
return(groupDescriptions.Count);
}
}
private static bool TryFind(IEnumerable <GroupLevelDescription> collection, GroupDescription description, out GroupLevelDescription result)
{
if ((collection == null) || (description == null))
{
result = null;
}
else
{
result = collection.Where(item => (item.GroupDescription == description)).FirstOrDefault();
}
return(result != null);
}
