void Interaction_GluingShapes(NGlueShapesEventArgs args)
{
// safely get the ports collection
NPortCollection ports = (NPortCollection)args.Shape2D.GetChild(NShape.PortsChild, false);
if (ports == null && ports.Count == 0)
{
return;
}
// get the anchor point in page coordinates
NPoint anchorInPage = args.ConnectBegin ? args.Shape1D.GetEndPointInPage() : args.Shape1D.GetBeginPointInPage();
// get the nearest port
NPort neartestPort = ports[0];
double neartestDistance = NGeometry2D.PointsDistance(anchorInPage, neartestPort.GetLocationInPage());
for (int i = 1; i < ports.Count; i++)
{
NPort curPort = ports[i];
double curDistance = NGeometry2D.PointsDistance(anchorInPage, curPort.GetLocationInPage());
if (curDistance < neartestDistance)
{
neartestDistance = curDistance;
neartestPort = curPort;
}
}
// connect begin or end
if (args.ConnectBegin)
{
args.Shape1D.GlueBeginToPort(neartestPort);
}
else
{
args.Shape1D.GlueEndToPort(neartestPort);
}
// cancel the event so that the diagram does not perform default connection
args.Cancel = true;
}
/// <summary>
/// Creates a custom shape that is essentially a group consisting of three other shapes each with different filling.
/// You need to use groups to have shapes that mix different fill, or stroke styles.
/// </summary>
/// <returns></returns>
protected NShape CreateCoffeeCupShape()
{
// create the points and paths from which the shape consits
NPoint[] cupPoints = new NPoint[] {
new NPoint(45, 268),
new NPoint(63, 331),
new NPoint(121, 331),
new NPoint(140, 268)
};
NGraphicsPath handleGraphicsPath = new NGraphicsPath();
handleGraphicsPath.AddClosedCurve(new NPoint[] {
new NPoint(175, 295),
new NPoint(171, 278),
new NPoint(140, 283),
new NPoint(170, 290),
new NPoint(128, 323)
}, 1);
NGraphicsPath steamGraphicsPath = new NGraphicsPath();
steamGraphicsPath.AddCubicBeziers(new NPoint[] {
new NPoint(92, 270),
new NPoint(53, 163),
new NPoint(145, 160),
new NPoint(86, 50),
new NPoint(138, 194),
new NPoint(45, 145),
new NPoint(92, 270)
});
steamGraphicsPath.CloseFigure();
// calculate some bounds
NRectangle handleBounds = handleGraphicsPath.ExactBounds;
NRectangle cupBounds = NGeometry2D.GetBounds(cupPoints);
NRectangle steamBounds = steamGraphicsPath.ExactBounds;
NRectangle geometryBounds = NRectangle.Union(cupBounds, handleBounds, steamBounds);
// normalize the points and paths by transforming them to relative coordinates
NRectangle normalRect = new NRectangle(0, 0, 1, 1);
NMatrix transform = NMatrix.CreateBoundsStretchMatrix(geometryBounds, normalRect);
transform.TransformPoints(cupPoints);
handleGraphicsPath.Transform(transform);
steamGraphicsPath.Transform(transform);
// create the cup shape
NDrawPolygon cupPolygon = new NDrawPolygon(normalRect, cupPoints);
cupPolygon.Relative = true;
NShape cupShape = new NShape();
cupShape.Init2DShape();
cupShape.Geometry.Fill = new NColorFill(NColor.Brown);
cupShape.Geometry.Add(cupPolygon);
cupShape.SetBounds(geometryBounds);
// create the cup handle
NDrawPath handlePath = new NDrawPath(normalRect, handleGraphicsPath);
handlePath.Relative = true;
NShape handleShape = new NShape();
handleShape.Init2DShape();
handleShape.Geometry.Fill = new NColorFill(NColor.LightSalmon);
handleShape.Geometry.Add(handlePath);
handleShape.SetBounds(geometryBounds);
// create the steam
NDrawPath steamPath = new NDrawPath(steamGraphicsPath.Bounds, steamGraphicsPath);
steamPath.Relative = true;
NShape steamShape = new NShape();
steamShape.Init2DShape();
steamShape.Geometry.Fill = new NColorFill(new NColor(50, 122, 122, 122));
steamShape.Geometry.Add(steamPath);
steamShape.SetBounds(geometryBounds);
// group the shapes as a single group
NGroup group;
NBatchGroup batch = new NBatchGroup(m_DrawingDocument);
batch.Build(cupShape, handleShape, steamShape);
batch.Group(null, out group);
// alter some properties of the group
group.SelectionMode = ENGroupSelectionMode.GroupOnly;
group.SnapToShapes = false;
return(group);
}
