private static void DataGridContextChangedCallback(DependencyObject sender, DependencyPropertyChangedEventArgs e)
{
DataGridContext dataGridContext = e.NewValue as DataGridContext;
GroupByControl panel = ( GroupByControl )sender;
if (dataGridContext != null)
{
panel.RegisterParentDataGridContext(dataGridContext);
}
}
private static void ParentGridControlChangedCallback(DependencyObject sender, DependencyPropertyChangedEventArgs e)
{
DataGridControl grid = e.NewValue as DataGridControl;
GroupByControl panel = ( GroupByControl )sender;
if (grid != null)
{
panel.PrepareDefaultStyleKey(grid.GetView());
}
}
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);
}
bool IDropTarget.CanDropElement(UIElement draggedElement)
{
bool allowGroupingModification = true;
GroupByControl parentGBC = this.GetParentGroupByControl();
if (parentGBC != null)
{
allowGroupingModification = parentGBC.IsGroupingModificationAllowed;
}
// We don't accept any ColumnManagerCell from Details
DataGridContext context = DataGridControl.GetDataGridContext(draggedElement);
ColumnManagerCell cell = draggedElement as ColumnManagerCell;
bool isAlreadyGroupedBy = false;
if (cell != null)
{
isAlreadyGroupedBy = GroupingHelper.IsAlreadyGroupedBy(cell);
ColumnBase parentColumn = cell.ParentColumn;
if ((parentColumn == null) || (!parentColumn.AllowGroup))
{
return(false);
}
}
DataGridContext sourceDetailContext = DataGridControl.GetDataGridContext(this);
Debug.Assert(sourceDetailContext != null);
DetailConfiguration sourceDetailConfig = (sourceDetailContext != null) ? sourceDetailContext.SourceDetailConfiguration : null;
DataGridContext draggedDetailContext = DataGridControl.GetDataGridContext(draggedElement);
Debug.Assert(draggedDetailContext != null);
DetailConfiguration draggedDetailConfig = (draggedDetailContext != null) ? draggedDetailContext.SourceDetailConfiguration : null;
bool canDrop = (sourceDetailConfig == draggedDetailConfig) &&
(allowGroupingModification) &&
((draggedElement is ColumnManagerCell) || (draggedElement is GroupByItem)) &&
(draggedElement != this) &&
(isAlreadyGroupedBy == false);
if (canDrop && (cell != null))
{
canDrop = GroupingHelper.ValidateMaxGroupDescriptions(draggedDetailContext);
}
return(canDrop);
}
private void m_dragSourceManager_DragOutsideQueryCursor(object sender, QueryCursorEventArgs e)
{
GroupByControl parentGBC = this.GetParentGroupByControl();
if ((parentGBC == null) || !parentGBC.IsGroupingModificationAllowed)
{
return;
}
DataGridContext dataGridContext = DataGridControl.GetDataGridContext(this);
if ((dataGridContext != null) && (dataGridContext.DataGridControl != null))
{
UIViewBase uiViewBase = dataGridContext.DataGridControl.GetView() as UIViewBase;
e.Cursor = (uiViewBase != null)
? uiViewBase.RemovingGroupCursor
: UIViewBase.DefaultGroupDraggedOutsideCursor;
}
else
{
e.Cursor = UIViewBase.DefaultGroupDraggedOutsideCursor;
}
}
void m_dragSourceManager_DroppedOutside(object sender, EventArgs e)
{
bool allowGroupingModification = true;
GroupByControl parentGBC = this.GetParentGroupByControl();
if (parentGBC != null)
{
allowGroupingModification = parentGBC.IsGroupingModificationAllowed;
}
if (allowGroupingModification)
{
DataGridContext dataGridContext = DataGridControl.GetDataGridContext(this);
Debug.Assert(dataGridContext != null);
if (dataGridContext != null)
{
GroupingHelper.RemoveGroupDescription(
dataGridContext.Items.GroupDescriptions,
this.Content as GroupLevelDescription,
dataGridContext.DataGridControl);
}
}
}