private void control_PreviewKeyDown(object sender, PreviewKeyDownEventArgs e)
{
Keys keyData = e.KeyData;
Keys modifiers = keyData & Keys.Modifiers;
keyData &= ~Keys.Modifiers;
if (keyData == Keys.Up ||
keyData == Keys.Right ||
keyData == Keys.Down ||
keyData == Keys.Left)
{
TNode startElement = Adapters.As <TNode>(m_selectionContext.LastSelected);
if (startElement != null)
{
Rectangle nearestRect;
TNode nearest = FindNearestElement(startElement, keyData, out nearestRect);
if (nearest != null)
{
var selection = new List <TNode>(m_selectionContext.SelectionCount);
selection.AddRange(m_selectionContext.GetSelection <TNode>());
KeysUtil.Select <TNode>(selection, nearest, modifiers);
m_selectionContext.Selection = selection.Cast <object>();
var transformAdapter = AdaptedControl.As <ITransformAdapter>();
if (transformAdapter != null)
{
transformAdapter.PanToRect(nearestRect);
}
}
}
}
}
public Rectangle GetBounds(IEnumerable <object> items)
{
float minX = float.MaxValue, minY = float.MaxValue;
float maxX = -float.MaxValue, maxY = -float.MaxValue;
foreach (var o in items)
{
var n = o as HyperGraph.Node;
if (n != null)
{
minX = System.Math.Min(minX, n.bounds.Left);
minY = System.Math.Min(minY, n.bounds.Top);
maxX = System.Math.Max(maxX, n.bounds.Right);
maxY = System.Math.Max(maxY, n.bounds.Bottom);
}
}
// interface wants the result in client coords, so we need to transform through
// the canvas transformation.
var graphControl = AdaptedControl.As <NodeEditorCore.GraphControl>();
if (graphControl != null)
{
var pts = new PointF[] { new PointF(minX, minY), new PointF(maxX, maxY) };
graphControl.Transform.TransformPoints(pts);
return(new Rectangle((int)pts[0].X, (int)pts[0].Y, (int)(pts[1].X - pts[0].X), (int)(pts[1].Y - pts[0].Y)));
}
return(new Rectangle((int)minX, (int)minY, (int)(maxX - minX), (int)(maxY - minY)));
}