private static void OnDragStarted(object sender, PointerRoutedEventArgs e)
#endif
{
var obj = sender as DependencyObject;
//we are starting the drag
SetIsDragging(obj, true);
// Save the position of the mouse to the start position
var area = GetAreaFromObject(obj);
var pos = GetPositionInArea(area, e);
SetOriginalMouseX(obj, pos.X);
SetOriginalMouseY(obj, pos.Y);
// Save the position of the dragged object to its starting position
SetOriginalX(obj, GraphAreaBase.GetFinalX(obj));
SetOriginalY(obj, GraphAreaBase.GetFinalY(obj));
// Save starting position of all tagged elements
if (GetIsTagged(obj))
{
foreach (var item in area.GetAllVertexControls())
{
if (GetIsTagged(item))
{
SetOriginalX(item, GraphAreaBase.GetFinalX(item));
SetOriginalY(item, GraphAreaBase.GetFinalY(item));
}
}
}
//capture the mouse
#if WPF
var element = obj as IInputElement;
if (element != null)
{
element.CaptureMouse();
element.MouseMove -= OnDragging;
element.MouseMove += OnDragging;
}
//else throw new GX_InvalidDataException("The control must be a descendent of the FrameworkElement or FrameworkContentElement!");
e.Handled = false;
#elif METRO
var element = obj as FrameworkElement;
if (element != null)
{
element.CapturePointer(e.Pointer);
element.PointerMoved += OnDragging;
}
e.Handled = true;
#endif
}
/// <summary>
/// Get control position on the GraphArea panel in attached coords X and Y (GraphX type version)
/// </summary>
/// <param name="final"></param>
/// <param name="round"></param>
internal Measure.Point GetPositionGraphX(bool final = false, bool round = false)
{
return(round ? new Measure.Point(final ? (int)GraphAreaBase.GetFinalX(this) : (int)GraphAreaBase.GetX(this), final ? (int)GraphAreaBase.GetFinalY(this) : (int)GraphAreaBase.GetY(this)) : new Measure.Point(final ? GraphAreaBase.GetFinalX(this) : GraphAreaBase.GetX(this), final ? GraphAreaBase.GetFinalY(this) : GraphAreaBase.GetY(this)));
}
/// <summary>
/// Get control position on the GraphArea panel in attached coords X and Y
/// </summary>
/// <param name="final"></param>
/// <param name="round"></param>
public Point GetPosition(bool final = false, bool round = false)
{
return(round ? new Point(final ? (int)GraphAreaBase.GetFinalX(this) : (int)GraphAreaBase.GetX(this), final ? (int)GraphAreaBase.GetFinalY(this) : (int)GraphAreaBase.GetY(this)) : new Point(final ? GraphAreaBase.GetFinalX(this) : GraphAreaBase.GetX(this), final ? GraphAreaBase.GetFinalY(this) : GraphAreaBase.GetY(this)));
}
/// <summary>
/// Create and apply edge path using calculated ER parameters stored in edge
/// </summary>
/// <param name="useCurrentCoords">Use current vertices coordinates or final coorfinates (for.ex if move animation is active final coords will be its destination)</param>
/// <param name="externalRoutingPoints">Provided custom routing points will be used instead of stored ones.</param>
/// <param name="updateLabel">Should edge label be updated in this pass</param>
public virtual void PrepareEdgePath(bool useCurrentCoords = false, Measure.Point[] externalRoutingPoints = null, bool updateLabel = true)
{
//do not calculate invisible edges
if ((Visibility != Visibility.Visible && !IsHiddenEdgesUpdated) && Source == null || Target == null || ManualDrawing || !IsTemplateLoaded)
{
return;
}
#region Get the inputs
//get the size of the source
var sourceSize = new Size
{
Width = Source.ActualWidth,
Height = Source.ActualHeight
};
if (CustomHelper.IsInDesignMode(this))
{
sourceSize = new Size(80, 20);
}
//get the position center of the source
var sourcePos = new Point
{
X = (useCurrentCoords ? GraphAreaBase.GetX(Source) : GraphAreaBase.GetFinalX(Source)) + sourceSize.Width * .5,
Y = (useCurrentCoords ? GraphAreaBase.GetY(Source) : GraphAreaBase.GetFinalY(Source)) + sourceSize.Height * .5
};
//get the size of the target
var targetSize = new Size
{
Width = Target.ActualWidth,
Height = Target.ActualHeight
};
if (CustomHelper.IsInDesignMode(this))
{
targetSize = new Size(80, 20);
}
//get the position center of the target
var targetPos = new Point
{
X = (useCurrentCoords ? GraphAreaBase.GetX(Target) : GraphAreaBase.GetFinalX(Target)) + targetSize.Width * .5,
Y = (useCurrentCoords ? GraphAreaBase.GetY(Target) : GraphAreaBase.GetFinalY(Target)) + targetSize.Height * .5
};
var routedEdge = Edge as IRoutingInfo;
if (routedEdge == null)
{
throw new GX_InvalidDataException("Edge must implement IRoutingInfo interface");
}
//get the route informations
var routeInformation = externalRoutingPoints ?? routedEdge.RoutingPoints;
// Get the TopLeft position of the Source Vertex.
var sourcePos1 = new Point
{
X = (useCurrentCoords ? GraphAreaBase.GetX(Source) : GraphAreaBase.GetFinalX(Source)),
Y = (useCurrentCoords ? GraphAreaBase.GetY(Source) : GraphAreaBase.GetFinalY(Source))
};
// Get the TopLeft position of the Target Vertex.
var targetPos1 = new Point
{
X = (useCurrentCoords ? GraphAreaBase.GetX(Target) : GraphAreaBase.GetFinalX(Target)),
Y = (useCurrentCoords ? GraphAreaBase.GetY(Target) : GraphAreaBase.GetFinalY(Target))
};
var hasEpSource = _edgePointerForSource != null;
var hasEpTarget = _edgePointerForTarget != null;
#endregion
//if self looped edge
if (IsSelfLooped)
{
PrepareSelfLoopedEdge(sourcePos1);
return;
}
//check if we have some edge route data
var hasRouteInfo = routeInformation != null && routeInformation.Length > 1;
//calculate source and target edge attach points
if (RootArea != null && !hasRouteInfo && RootArea.EnableParallelEdges && ParallelEdgeOffset != 0)
{
sourcePos = GetParallelOffset(Source, Target, ParallelEdgeOffset);
targetPos = GetParallelOffset(Target, Source, -ParallelEdgeOffset);
}
/* Rectangular shapes implementation by bleibold */
var gEdge = Edge as IGraphXCommonEdge;
Point p1;
Point p2;
//calculate edge source (p1) and target (p2) endpoints based on different settings
if (gEdge != null && gEdge.SourceConnectionPointId.HasValue)
{
var sourceCp = Source.GetConnectionPointById(gEdge.SourceConnectionPointId.Value, true);
if (sourceCp == null)
{
throw new GX_ObjectNotFoundException(string.Format("Can't find source vertex VCP by edge source connection point Id({1}) : {0}", Source, gEdge.SourceConnectionPointId));
}
if (sourceCp.Shape == VertexShape.None)
{
p1 = sourceCp.RectangularSize.Center();
}
else
{
var targetCpPos = gEdge.TargetConnectionPointId.HasValue ? Target.GetConnectionPointById(gEdge.TargetConnectionPointId.Value, true).RectangularSize.Center() : (hasRouteInfo ? routeInformation[1].ToWindows() : (targetPos));
p1 = GeometryHelper.GetEdgeEndpoint(sourceCp.RectangularSize.Center(), sourceCp.RectangularSize, targetCpPos, sourceCp.Shape);
}
}
else
{
p1 = GeometryHelper.GetEdgeEndpoint(sourcePos, new SysRect(sourcePos1, sourceSize), (hasRouteInfo ? routeInformation[1].ToWindows() : (targetPos)), Source.VertexShape);
}
if (gEdge != null && gEdge.TargetConnectionPointId.HasValue)
{
var targetCp = Target.GetConnectionPointById(gEdge.TargetConnectionPointId.Value, true);
if (targetCp == null)
{
throw new GX_ObjectNotFoundException(string.Format("Can't find target vertex VCP by edge target connection point Id({1}) : {0}", Target, gEdge.TargetConnectionPointId));
}
if (targetCp.Shape == VertexShape.None)
{
p2 = targetCp.RectangularSize.Center();
}
else
{
var sourceCpPos = gEdge.SourceConnectionPointId.HasValue ? Source.GetConnectionPointById(gEdge.SourceConnectionPointId.Value, true).RectangularSize.Center() : hasRouteInfo ? routeInformation[routeInformation.Length - 2].ToWindows() : (sourcePos);
p2 = GeometryHelper.GetEdgeEndpoint(targetCp.RectangularSize.Center(), targetCp.RectangularSize, sourceCpPos, targetCp.Shape);
}
}
else
{
p2 = GeometryHelper.GetEdgeEndpoint(targetPos, new SysRect(targetPos1, targetSize), hasRouteInfo ? routeInformation[routeInformation.Length - 2].ToWindows() : (sourcePos), Target.VertexShape);
}
SourceConnectionPoint = p1;
TargetConnectionPoint = p2;
_linegeometry = new PathGeometry(); PathFigure lineFigure;
//if we have route and route consist of 2 or more points
if (RootArea != null && hasRouteInfo)
{
//replace start and end points with accurate ones
var routePoints = routeInformation.ToWindows().ToList();
routePoints.Remove(routePoints.First());
routePoints.Remove(routePoints.Last());
routePoints.Insert(0, p1);
routePoints.Add(p2);
if (RootArea.EdgeCurvingEnabled)
{
var oPolyLineSegment = GeometryHelper.GetCurveThroughPoints(routePoints.ToArray(), 0.5, RootArea.EdgeCurvingTolerance);
if (hasEpTarget)
{
UpdateTargetEpData(oPolyLineSegment.Points[oPolyLineSegment.Points.Count - 1], oPolyLineSegment.Points[oPolyLineSegment.Points.Count - 2]);
oPolyLineSegment.Points.RemoveAt(oPolyLineSegment.Points.Count - 1);
}
if (hasEpSource)
{
UpdateSourceEpData(oPolyLineSegment.Points.First(), oPolyLineSegment.Points[1]);
}
lineFigure = GeometryHelper.GetPathFigureFromPathSegments(routePoints[0], true, true, oPolyLineSegment);
#if WPF
//freeze and create resulting geometry
GeometryHelper.TryFreeze(oPolyLineSegment);
#endif
}
else
{
if (hasEpSource)
{
UpdateSourceEpData(routePoints.First(), routePoints[1]);
}
if (hasEpTarget)
{
routePoints[routePoints.Count - 1] = routePoints[routePoints.Count - 1].Subtract(UpdateTargetEpData(p2, routePoints[routePoints.Count - 2]));
}
var pcol = new PointCollection();
foreach (var item in routePoints)
{
pcol.Add(item);
}
lineFigure = new PathFigure {
StartPoint = p1, Segments = new PathSegmentCollection {
new PolyLineSegment {
Points = pcol
}
}, IsClosed = false
};
}
}
else // no route defined
{
if (hasEpSource)
{
UpdateSourceEpData(p1, p2);
}
if (hasEpTarget)
{
p2 = p2.Subtract(UpdateTargetEpData(p2, p1));
}
lineFigure = new PathFigure {
StartPoint = p1, Segments = new PathSegmentCollection {
new LineSegment()
{
Point = p2
}
}, IsClosed = false
};
}
((PathGeometry)_linegeometry).Figures.Add(lineFigure);
#if WPF
GeometryHelper.TryFreeze(lineFigure);
GeometryHelper.TryFreeze(_linegeometry);
#endif
if (ShowLabel && _edgeLabelControl != null && _updateLabelPosition && updateLabel)
{
_edgeLabelControl.UpdatePosition();
}
}
private static void OnDragging(object sender, PointerRoutedEventArgs e)
#endif
{
var obj = sender as DependencyObject;
if (!GetIsDragging(obj))
{
return;
}
var area = GetAreaFromObject(obj);
var pos = GetPositionInArea(area, e);
double horizontalChange = pos.X - GetOriginalMouseX(obj);
double verticalChange = pos.Y - GetOriginalMouseY(obj);
// Determine whether to use snapping
bool snap = GetIsSnappingPredicate(obj)(obj);
bool individualSnap = false;
// Snap modifier functions to apply to the primary dragged object
SnapModifierFunc snapXMod = null;
SnapModifierFunc snapYMod = null;
// Snap modifier functions to apply to other dragged objects if they snap individually instead of moving
// the same amounts as the primary object.
SnapModifierFunc individualSnapXMod = null;
SnapModifierFunc individualSnapYMod = null;
if (snap)
{
snapXMod = GetXSnapModifier(obj);
snapYMod = GetYSnapModifier(obj);
// If objects snap to grid individually instead of moving the same amount as the primary dragged object,
// use the same snap modifier on each individual object.
individualSnap = GetIsIndividualSnappingPredicate(obj)(obj);
if (individualSnap)
{
individualSnapXMod = snapXMod;
individualSnapYMod = snapYMod;
}
}
if (GetIsTagged(obj))
{
// When the dragged item is a tagged item, we could be dragging a group of objects. If the dragged object is a vertex, it's
// automatically the primary object of the drag. If the dragged object is an edge, prefer the source vertex, but accept the
// target vertex as the primary object of the drag and start with that.
var primaryDragVertex = obj as VertexControl;
if (primaryDragVertex == null)
{
var ec = obj as EdgeControl;
if (ec != null)
{
primaryDragVertex = ec.Source ?? ec.Target;
}
if (primaryDragVertex == null)
{
Debug.WriteLine("OnDragging() -> Tagged and dragged the wrong object?");
return;
}
}
UpdateCoordinates(area, primaryDragVertex, horizontalChange, verticalChange, snapXMod, snapYMod);
if (!individualSnap)
{
// When dragging groups of objects that all move the same amount (not snapping individually, but tracking with
// the movement of the primary dragged object), deterrmine how much offset the primary dragged object experienced
// and use that offset for the rest.
horizontalChange = GraphAreaBase.GetFinalX(primaryDragVertex) - GetOriginalX(primaryDragVertex);
verticalChange = GraphAreaBase.GetFinalY(primaryDragVertex) - GetOriginalY(primaryDragVertex);
}
foreach (var item in area.GetAllVertexControls())
{
if (!ReferenceEquals(item, primaryDragVertex) && GetIsTagged(item))
{
UpdateCoordinates(area, item, horizontalChange, verticalChange, individualSnapXMod, individualSnapYMod);
}
}
}
else
{
UpdateCoordinates(area, obj, horizontalChange, verticalChange, snapXMod, snapYMod);
}
e.Handled = true;
}