protected override void HandleDragOver(sw.DragEventArgs e, DragEventArgs args)
{
var lastRow = LastDragRow;
base.HandleDragOver(e, args);
var info = LastDragInfo = GetDragInfo(args);
if (args.Effects != DragEffects.None)
{
// show drag indicator!
var row = GetDataGridRow(GetItemAtRow(info.Index));
if (row != null)
{
// same position, just return
if (lastRow != null && lastRow.IsEqual(row, info.InsertIndex))
{
return;
}
lastRow?.Revert();
LastDragRow = new GridDragRowState(row, info.InsertIndex);
if (info.InsertIndex == -1)
{
row.Background = sw.SystemColors.HighlightBrush;
row.Foreground = sw.SystemColors.HighlightTextBrush;
}
else
{
var d = new swm.GeometryDrawing();
var gg = new swm.GeometryGroup();
gg.Children.Add(new swm.LineGeometry(new sw.Point(0, 0), new sw.Point(row.ActualWidth, 0)));
d.Geometry = gg;
d.Brush = sw.SystemColors.HighlightBrush;
d.Pen = new swm.Pen(sw.SystemColors.HighlightBrush, 1);
var b = new swm.DrawingBrush {
Drawing = d, TileMode = swm.TileMode.None, Stretch = swm.Stretch.None, AlignmentX = swm.AlignmentX.Left
};
if (info.InsertIndex == row.GetIndex())
{
b.AlignmentY = swm.AlignmentY.Top;
row.BorderThickness = new sw.Thickness(0, 1, 0, 0);
}
else
{
b.AlignmentY = swm.AlignmentY.Bottom;
row.BorderThickness = new sw.Thickness(0, 0, 0, 1);
}
row.BorderBrush = b;
}
return;
}
}
ResetDrag();
}
protected override void HandleDragOver(sw.DragEventArgs e, DragEventArgs args)
{
var lastRow = LastDragRow;
base.HandleDragOver(e, args);
var info = LastDragInfo = GetDragInfo(args);
if (args.Effects != DragEffects.None)
{
// show drag indicator!
var row = GetDataGridRow(info.Item ?? info.Parent);
if (row != null)
{
// same position, just return
if (lastRow != null && lastRow.IsEqual(row, info.InsertIndex))
{
return;
}
lastRow?.Revert();
LastDragRow = new GridDragRowState(row, info.InsertIndex);
if (info.InsertIndex == -1)
{
row.Background = sw.SystemColors.HighlightBrush;
row.Foreground = sw.SystemColors.HighlightTextBrush;
}
else
{
var node = controller.GetNodeAtRow(row.GetIndex());
var level = node.Level + 1; // indicator to the right of the expanders to align with text
var i = info.Parent as ITreeGridItem;
if (info.Position == GridDragPosition.After && ReferenceEquals(info.Item, null))
{
level++;
}
level *= 16;
var d = new swm.GeometryDrawing();
var gg = new swm.GeometryGroup();
gg.Children.Add(new swm.EllipseGeometry(new sw.Point(0, 0), 2, 2));
gg.Children.Add(new swm.LineGeometry(new sw.Point(2, 0), new sw.Point(row.ActualWidth - level - 16, 0)));
d.Geometry = gg;
d.Brush = sw.SystemColors.HighlightBrush;
d.Pen = new swm.Pen(sw.SystemColors.HighlightBrush, 1);
var b = new swm.DrawingBrush {
Drawing = d, TileMode = swm.TileMode.None, Stretch = swm.Stretch.None, AlignmentX = swm.AlignmentX.Left
};
if (info.InsertIndex == node.Index)
{
b.AlignmentY = swm.AlignmentY.Top;
row.BorderThickness = new sw.Thickness(0, 5, 0, 0);
}
else
{
b.AlignmentY = swm.AlignmentY.Bottom;
row.BorderThickness = new sw.Thickness(0, 0, 0, 5);
}
b.Transform = new swm.TranslateTransform(level, 0);
row.BorderBrush = b;
}
return;
}
}
ResetDrag();
}