void IDropTarget.DragOver(UIElement draggedElement, RelativePoint mousePosition)
        {
            ColumnManagerCell cell = draggedElement as ColumnManagerCell;

            if (cell != null)
            {
                DataGridContext draggedCellDataGridContext = DataGridControl.GetDataGridContext(cell);

                HierarchicalGroupByControlNode draggedOverHierarchicalGroupByControlNode = HierarchicalGroupByItem.GetParentHierarchicalGroupByControlNode(this);

                if (draggedCellDataGridContext == null)
                {
                    throw new DataGridInternalException("A ColumnManagerCell must have a DataGridContext.");
                }

                if (draggedOverHierarchicalGroupByControlNode == null)
                {
                    throw new DataGridInternalException("draggedOverHierarchicalGroupByControlNode is null.");
                }

                if (draggedOverHierarchicalGroupByControlNode.GroupLevelDescriptions == draggedCellDataGridContext.GroupLevelDescriptions)
                {
                    this.ShowDropMark(mousePosition);
                }
                else
                {
                    // This ColumnManagerCell does not belong this parent HierarchicalGroupByControlNode, display the DropMark on the correct one
                    HierarchicalGroupByControl parentGBC = GroupingHelper.GetHierarchicalGroupByControl(draggedOverHierarchicalGroupByControlNode);

                    if (parentGBC == null)
                    {
                        throw new DataGridInternalException("The hierarchical group-by item must be rooted by a HierarchicalGroupByControl.");
                    }

                    HierarchicalGroupByControlNode hierarchicalGroupByControlNode = parentGBC.GetHierarchicalGroupByControlNodeFromColumnManagerCell(cell);

                    Debug.Assert(hierarchicalGroupByControlNode != null, "CanDrop should have returned false");
                    if (hierarchicalGroupByControlNode == null)
                    {
                        throw new DataGridInternalException("A HierarchicalGroupByControlNode must exist for every level.");
                    }

                    hierarchicalGroupByControlNode.ShowFarDropMark(cell, mousePosition);
                }
            }
            else
            {
                HierarchicalGroupByItem hierarchicalGroupByItem = draggedElement as HierarchicalGroupByItem;

                if (hierarchicalGroupByItem == null)
                {
                    return;
                }

                HierarchicalGroupByControlNode draggedHierarchicalGroupByControlNode = HierarchicalGroupByItem.GetParentHierarchicalGroupByControlNode(hierarchicalGroupByItem);

                HierarchicalGroupByControlNode draggedOverHierarchicalGroupByControlNode = HierarchicalGroupByItem.GetParentHierarchicalGroupByControlNode(this);

                if (draggedHierarchicalGroupByControlNode == null)
                {
                    throw new DataGridInternalException("draggedHierarchicalGroupByControlNode is null.");
                }

                if (draggedOverHierarchicalGroupByControlNode == null)
                {
                    throw new DataGridInternalException("draggedOverHierarchicalGroupByControlNode is null.");
                }

                if (draggedHierarchicalGroupByControlNode.GroupLevelDescriptions == draggedOverHierarchicalGroupByControlNode.GroupLevelDescriptions)
                {
                    this.ShowDropMark(mousePosition);
                }
                else
                {
                    // This HierarchicalGroupByItem does not belong this parent HierarchicalGroupByControlNode, display the DropMark on the correct one
                    HierarchicalGroupByControl parentGBC = GroupingHelper.GetHierarchicalGroupByControl(draggedOverHierarchicalGroupByControlNode);

                    if (parentGBC == null)
                    {
                        throw new DataGridInternalException("A hierarchical group-by item must be rooted by a HierarchicalGroupByControl.");
                    }

                    HierarchicalGroupByControlNode hierarchicalGroupByControlNode = parentGBC.GetHierarchicalGroupByControlNodeFromHierarchicalGroupByItem(hierarchicalGroupByItem);

                    Debug.Assert(hierarchicalGroupByControlNode != null, "CanDrop should have returned false");
                    if (hierarchicalGroupByControlNode == null)
                    {
                        throw new DataGridInternalException("A HierarchicalGroupByControlNode must exist for every level.");
                    }

                    hierarchicalGroupByControlNode.ShowFarDropMark(mousePosition);
                }
            }
        }
        bool IDropTarget.CanDropElement(UIElement draggedElement, RelativePoint mousePosition)
        {
            bool canDrop = true;

            // Check if this HierarchicalGroupByItem parent HierarchicalGroupByControlNode allows grouping modifications, default yes
            HierarchicalGroupByControlNode parentHierarchicalGroupByControlNode = HierarchicalGroupByItem.GetParentHierarchicalGroupByControlNode(this);

            if (parentHierarchicalGroupByControlNode != null)
            {
                canDrop = parentHierarchicalGroupByControlNode.IsGroupingModificationAllowed;
            }

            ColumnManagerCell cell = draggedElement as ColumnManagerCell;

            HierarchicalGroupByItem hierarchicalGroupByItem = null;

            if (canDrop)
            {
                if (cell != null)
                {
                    ColumnBase parentColumn = cell.ParentColumn;

                    if ((parentColumn == null) || (!parentColumn.AllowGroup))
                    {
                        return(false);
                    }

                    // Check if already grouped using the cell's DataGridContext
                    canDrop = !GroupingHelper.IsAlreadyGroupedBy(cell);

                    if (canDrop)
                    {
                        // Get the HierarchicalGroupByControl for this HierarchicalGroupByItem
                        HierarchicalGroupByControl parentGBC = GroupingHelper.GetHierarchicalGroupByControl(parentHierarchicalGroupByControlNode);

                        if (parentGBC == null)
                        {
                            throw new DataGridInternalException("The hierarchical group-by item must be rooted by a HierarchicalGroupByControl.");
                        }

                        DataGridContext parentGBCDataGridContext = DataGridControl.GetDataGridContext(parentGBC);

                        if (parentGBCDataGridContext.Items != null)
                        {
                            canDrop = parentGBCDataGridContext.Items.CanGroup;
                        }

                        if (canDrop)
                        {
                            canDrop = GroupingHelper.IsColumnManagerCellInDataGridContext(parentGBCDataGridContext, cell);

                            if (canDrop == true)
                            {
                                canDrop = GroupingHelper.ValidateMaxGroupDescriptions(DataGridControl.GetDataGridContext(draggedElement));
                            }
                        }
                    }
                }
                else
                {
                    hierarchicalGroupByItem = draggedElement as HierarchicalGroupByItem;

                    if (hierarchicalGroupByItem == null)
                    {
                        canDrop = false;
                    }

                    if (canDrop)
                    {
                        HierarchicalGroupByControl parentGBC = GroupingHelper.GetHierarchicalGroupByControl(parentHierarchicalGroupByControlNode);

                        if (parentGBC == null)
                        {
                            throw new DataGridInternalException("The hierarchical group-by item must be rooted by a HierarchicalGroupByControl.");
                        }

                        // Try to get the HierarchicalGroupByControlNode in which this HierarchicalGroupByItem can be added using the parent HierarchicalGroupByControl => null it can't
                        HierarchicalGroupByControlNode draggedHierarchicalGroupByControlNode = parentGBC.GetHierarchicalGroupByControlNodeFromHierarchicalGroupByItem(hierarchicalGroupByItem);

                        if (draggedHierarchicalGroupByControlNode == null)
                        {
                            canDrop = false;
                        }
                    }
                }
            }


            bool returnedValue = ((cell != null) || (hierarchicalGroupByItem != null)) && // ColumnManagerCell or HierarchicalGroupByItem
                                 (draggedElement != this) &&
                                 (canDrop);


            return(returnedValue);
        }
Example #3
0
        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();
        }
        bool IDropTarget.CanDropElement(UIElement draggedElement, RelativePoint mousePosition)
        {
            bool canDrop = this.AllowGroupingModification;

            ColumnManagerCell       cell = null;
            HierarchicalGroupByItem hierarchicalGroupByItem = null;

            if (canDrop)
            {
                cell = draggedElement as ColumnManagerCell;

                if (cell != null)
                {
                    ColumnBase parentColumn = cell.ParentColumn;

                    if ((parentColumn == null) || (!parentColumn.AllowGroup))
                    {
                        return(false);
                    }

                    // Check if already grouped using the cell's DataGridContext
                    canDrop = !GroupingHelper.IsAlreadyGroupedBy(cell);

                    if (canDrop)
                    {
                        DataGridContext thisDataGridContext = DataGridControl.GetDataGridContext(this);

                        if (thisDataGridContext.Items != null)
                        {
                            canDrop = thisDataGridContext.Items.CanGroup;
                        }

                        if (canDrop)
                        {
                            canDrop = GroupingHelper.IsColumnManagerCellInDataGridContext(thisDataGridContext, cell);

                            if (canDrop == true)
                            {
                                canDrop = GroupingHelper.ValidateMaxGroupDescriptions(DataGridControl.GetDataGridContext(draggedElement));
                            }
                        }
                    }
                }
                else
                {
                    hierarchicalGroupByItem = draggedElement as HierarchicalGroupByItem;

                    if (hierarchicalGroupByItem == null)
                    {
                        canDrop = false;
                    }

                    if (canDrop)
                    {
                        // Try to get the HierarchicalGroupByControlNode in which this HierarchicalGroupByItem can be added using the parent HierarchicalGroupByControl => null it can't
                        HierarchicalGroupByControlNode draggedHierarchicalGroupByControlNode = this.GetHierarchicalGroupByControlNodeFromHierarchicalGroupByItem(hierarchicalGroupByItem);

                        if (draggedHierarchicalGroupByControlNode == null)
                        {
                            canDrop = false;
                        }
                    }
                }
            }

            bool returnedValue = ((cell != null) || (hierarchicalGroupByItem != null)) && // ColumnManagerCell or HierarchicalGroupByItem
                                 (canDrop);


            return(returnedValue);
        }
Example #5
0
        void IDropTarget.DragLeave(UIElement draggedElement)
        {
            ColumnManagerCell cell = draggedElement as ColumnManagerCell;

            if (cell != null)
            {
                DataGridContext draggedCellDataGridContext = DataGridControl.GetDataGridContext(cell);

                HierarchicalGroupByControlNode draggedOverHierarchicalGroupByControlNode = HierarchicalGroupByItem.GetParentHierarchicalGroupByControlNode(this);

                if (draggedOverHierarchicalGroupByControlNode == null)
                {
                    throw new DataGridInternalException("We should never be dragged over and not contained inside a HierarchicalGroupByControlNode.");
                }

                if (draggedOverHierarchicalGroupByControlNode.GroupLevelDescriptions == draggedCellDataGridContext.GroupLevelDescriptions)
                {
                    this.HideDropMark();
                }
                else
                {
                    // This ColumnManagerCell does not belong this parent HierarchicalGroupByControlNode, display the DropMark on the correct one
                    HierarchicalGroupByControl parentGBC = GroupingHelper.GetHierarchicalGroupByControl(draggedOverHierarchicalGroupByControlNode);

                    if (parentGBC == null)
                    {
                        throw new DataGridInternalException("A hierarchical group-by item must be rooted by a HierarchicalGroupByControl.");
                    }

                    HierarchicalGroupByControlNode hierarchicalGroupByControlNode = parentGBC.GetHierarchicalGroupByControlNodeFromColumnManagerCell(cell);

                    Debug.Assert(hierarchicalGroupByControlNode != null, "CanDrop should have returned false");
                    if (hierarchicalGroupByControlNode == null)
                    {
                        throw new DataGridInternalException("A HierarchicalGroupByControlNode must exist for every level.");
                    }

                    hierarchicalGroupByControlNode.HideFarDropMark(cell);
                }
            }
            else
            {
                HierarchicalGroupByItem hierarchicalGroupByItem = draggedElement as HierarchicalGroupByItem;

                if (hierarchicalGroupByItem == null)
                {
                    return;
                }

                HierarchicalGroupByControlNode draggedHierarchicalGroupByControlNode = HierarchicalGroupByItem.GetParentHierarchicalGroupByControlNode(hierarchicalGroupByItem);

                HierarchicalGroupByControlNode draggedOverHierarchicalGroupByControlNode = HierarchicalGroupByItem.GetParentHierarchicalGroupByControlNode(this);

                if (draggedHierarchicalGroupByControlNode == null)
                {
                    throw new DataGridInternalException();
                }

                if (draggedOverHierarchicalGroupByControlNode == null)
                {
                    throw new DataGridInternalException();
                }

                if (draggedHierarchicalGroupByControlNode.GroupLevelDescriptions == draggedOverHierarchicalGroupByControlNode.GroupLevelDescriptions)
                {
                    this.HideDropMark();
                }
                else
                {
                    // This HierarchicalGroupByItem does not belong this parent HierarchicalGroupByControlNode, display the DropMark on the correct one
                    HierarchicalGroupByControl parentGBC = GroupingHelper.GetHierarchicalGroupByControl(draggedOverHierarchicalGroupByControlNode);

                    Debug.Assert(parentGBC != null);
                    if (parentGBC == null)
                    {
                        throw new DataGridInternalException("A hierarchical group-by item must be rooted by a HierarchicalGroupByControl.");
                    }

                    HierarchicalGroupByControlNode hierarchicalGroupByControlNode = parentGBC.GetHierarchicalGroupByControlNodeFromHierarchicalGroupByItem(hierarchicalGroupByItem);

                    Debug.Assert(hierarchicalGroupByControlNode != null, "CanDrop should have returned false");
                    if (hierarchicalGroupByControlNode == null)
                    {
                        throw new DataGridInternalException("A HierarchicalGroupByControlNode must exist for every level.");
                    }

                    hierarchicalGroupByControlNode.HideFarDropMark();
                }
            }
        }