protected override void PerformDropToViewCore(DragDropManagerBase sourceManager)
{
GridViewHitInfoBase hitInfo = GetHitInfo(HitElement);
if (BanDrop(hitInfo.RowHandle, hitInfo, sourceManager, DropTargetType.None))
{
ClearDragInfo(sourceManager);
return;
}
PerformDropToView(sourceManager, hitInfo as TableViewHitInfo, LastPosition, SetReorderDropInfo, (_) => SetMoveToGroupRowDropInfo, SetAddRowsDropInfo);
}
private void MainWindow_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
DependencyObject target = e.OriginalSource as DependencyObject;
GridViewHitInfoBase hitInfo = AssociatedObject.CalcHitInfo(target);
if (hitInfo != null && hitInfo.RowHandle >= 0)
{
if ((hitInfo.Column == null || hitInfo.Column.FieldName == "Name") && (target is TextBlock || target is Image))
{
AllowDragDrop();
return;
}
object row = AssociatedObject.DataControl.GetRow(hitInfo.RowHandle);
if (target.ParentExists <CheckEdit>())
{
if (AssociatedObject.DataControl.SelectedItems.Contains(row))
{
AssociatedObject.DataControl.SelectedItems.Remove(row);
}
else
{
AssociatedObject.DataControl.SelectedItems.Add(row);
}
e.Handled = true;
}
if (AssociatedObject.DataControl.SelectedItems.Contains(row))
{
AllowDragDrop();
}
else
{
ShowSelectionRectangle();
}
}
else
{
AssociatedObject.DataControl.CurrentItem = null;
ShowSelectionRectangle();
}
}
private void grid_MouseMove(object sender, System.Windows.Input.MouseEventArgs e)
{
Point location = e.GetPosition(grid);
double hOffset = location.X - startPosition.X;
if (FlowDirection == System.Windows.FlowDirection.RightToLeft)
{
hOffset = -hOffset;
}
hitInfoPopup.HorizontalOffset = hOffset;
hitInfoPopup.VerticalOffset = location.Y - startPosition.Y;
GridViewHitInfoBase info = GetHitInfo(e);
hitInfoList.Clear();
AddHitInfo("HitTest", TypeDescriptor.GetProperties(info)["HitTest"].GetValue(info).ToString());
AddHitInfo("Column", info.Column != null ? info.Column.HeaderCaption as string : "No column");
AddHitInfo("RowHandle", GetRowHandleDescription(info.RowHandle));
AddHitInfo("CellValue", info.Column != null ? grid.GetCellDisplayText(info.RowHandle, info.Column) : null);
info.Accept(CreateDemoHitTestVisitor());
}
