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();
}
public override void HandleDragDrop(object o, Gtk.DragDropArgs args)
{
// use the info from last drag if it was set
var info = Handler?.GetDragInfo(DragArgs);
if (info?.IsChanged == true)
{
_dragInfo = info;
}
base.HandleDragDrop(o, args);
_dragInfo = null;
}
protected override DragEventArgs GetDragEventArgs(Gdk.DragContext context, PointF?location, uint time = 0, object controlObject = null)
{
var t = Handler?.Tree;
GridViewDragInfo dragInfo = _dragInfo;
if (dragInfo == null && location != null)
{
if (t.GetDestRowAtPos((int)location.Value.X, (int)location.Value.Y, out var path, out var pos))
{
var item = Handler.model.GetItemAtPath(path);
var indecies = path.Indices;
var index = indecies[indecies.Length - 1];
dragInfo = new GridViewDragInfo(Handler.Widget, item, index, pos.ToEto());
}
}
return(base.GetDragEventArgs(context, location, time, dragInfo));
}
protected override Eto.Forms.DragEventArgs GetDragEventArgs(System.Windows.DragEventArgs data, object controlObject)
{
var location = data.GetPosition(Control).ToEto();
var cell = Widget.GetCellAt(location);
var item = cell.Item;
int index;
var row = GetDataGridRow(cell.Item);
GridDragPosition position;
if (row != null)
{
index = row.GetIndex();
var rowLocation = row.TransformToAncestor(Control).Transform(new sw.Point(0, 0));
if (location.Y + 4 > rowLocation.Y + row.ActualHeight - row.BorderThickness.Vertical())
{
position = GridDragPosition.After;
}
else if (location.Y < rowLocation.Y + 4 + row.BorderThickness.Top)
{
position = GridDragPosition.Before;
}
else
{
position = GridDragPosition.Over;
}
}
else
{
item = null;
position = GridDragPosition.Over;
index = -1;
}
controlObject = new GridViewDragInfo(Widget, item, index, position);
return(base.GetDragEventArgs(data, controlObject));
}
void ResetDrag()
{
LastDragInfo = null;
LastDragRow?.Revert();
LastDragRow = null;
}
