/// <summary>
/// Sets the fixed source or target terminal point on the given edge.
/// </summary>
/// <param name="edge">State whose terminal point should be updated.</param>
/// <param name="terminal">State which represents the actual terminal.</param>
/// <param name="source">Boolean that specifies if the terminal is the source.</param>
/// <param name="constraint">Constraint that specifies the connection.</param>
public void UpdateFixedTerminalPoint(mxCellState edge, mxCellState terminal,
bool source, mxConnectionConstraint constraint)
{
mxPoint pt = null;
if (constraint != null)
{
pt = graph.GetConnectionPoint(terminal, constraint);
}
if (pt == null && terminal == null)
{
mxPoint orig = edge.Origin;
mxGeometry geo = graph.GetCellGeometry(edge.Cell);
pt = geo.GetTerminalPoint(source);
if (pt != null)
{
pt = new mxPoint(scale * (translate.X + pt.X + orig.X),
scale * (translate.Y + pt.Y + orig.Y));
}
}
edge.SetAbsoluteTerminalPoint(pt, source);
}
/// <summary>
/// Transforms the given control point to an absolute point.
/// </summary>
public mxPoint TransformControlPoint(mxCellState state, mxPoint pt)
{
mxPoint orig = state.Origin;
return(new mxPoint(scale * (pt.X + translate.X + orig.X),
scale * (pt.Y + translate.Y + orig.Y)));
}
/// <summary>
/// Updates the absolute points in the given state using the specified array
/// of points as the relative points.
/// </summary>
/// <param name="edge">Cell state whose absolute points should be updated.</param>
/// <param name="points">Array of points that constitute the relative points.</param>
/// <param name="source">Cell that represents the source terminal.</param>
/// <param name="target">Cell that represents the target terminal.</param>
public void UpdatePoints(mxCellState edge, List <mxPoint> points, mxCellState source, mxCellState target)
{
if (edge != null)
{
List <mxPoint> pts = new List <mxPoint>();
pts.Add(edge.AbsolutePoints[0]);
mxEdgeStyleFunction edgeStyle = GetEdgeStyle(edge, points, source, target);
if (edgeStyle != null)
{
mxCellState src = GetTerminalPort(edge, source, true);
mxCellState trg = GetTerminalPort(edge, target, false);
((mxEdgeStyleFunction)edgeStyle)(edge, src, trg, points, pts);
}
else if (points != null)
{
for (int i = 0; i < points.Count; i++)
{
if (points[i] is mxPoint)
{
mxPoint pt = points[i].Clone();
pts.Add(TransformControlPoint(edge, pt));
}
}
}
List <mxPoint> tmp = edge.AbsolutePoints;
pts.Add(tmp[tmp.Count - 1]);
edge.AbsolutePoints = pts;
}
}
/// <summary>
/// Draws the shadow.
/// </summary>
/// <param name="canvas"></param>
/// <param name="state"></param>
/// <param name="rotation"></param>
/// <param name="flipH"></param>
/// <param name="flipV"></param>
/// <param name="bounds"></param>
/// <param name="alpha"></param>
protected void DrawShadow(mxGdiCanvas2D canvas, mxCellState state, double rotation, bool flipH,
bool flipV, mxRectangle bounds, double alpha, bool filled)
{
// Requires background in generic shape for shadow, looks like only one
// fillAndStroke is allowed per current path, try working around that
// Computes rotated shadow offset
double rad = rotation * Math.PI / 180;
double cos = Math.Cos(-rad);
double sin = Math.Sin(-rad);
mxPoint offset = mxUtils.GetRotatedPoint(new mxPoint(mxConstants.SHADOW_OFFSETX, mxConstants.SHADOW_OFFSETY), cos, sin);
if (flipH)
{
offset.X *= -1;
}
if (flipV)
{
offset.Y *= -1;
}
// TODO: Use save/restore instead of negative offset to restore (requires fix for HTML canvas)
canvas.Translate(offset.X, offset.Y);
// Returns true if a shadow has been painted (path has been created)
if (DrawShape(canvas, state, bounds, true))
{
canvas.Alpha = mxConstants.STENCIL_SHADOW_OPACITY * alpha;
// TODO: Implement new shadow
//canvas.Shadow(mxConstants.STENCIL_SHADOWCOLOR, filled);
}
canvas.Translate(-offset.X, -offset.Y);
}
/// <summary>
/// Returns a point that defines the location of the intersection point between
/// the perimeter and the line between the center of the shape and the given point.
/// </summary>
/// <param name="terminal">State for the source or target terminal.</param>
/// <param name="next">Point that lies outside of the given terminal.</param>
/// <param name="orthogonal">Specifies if the orthogonal projection onto
/// the perimeter should be returned. If this is false then the intersection
/// of the perimeter and the line between the next and the center point is
/// returned.</param>
/// <param name="border">Optional border between the perimeter and the shape.</param>
public mxPoint GetPerimeterPoint(mxCellState terminal, mxPoint next, bool orthogonal, double border)
{
mxPoint point = null;
if (terminal != null)
{
mxPerimeterFunction perimeter = GetPerimeterFunction(terminal);
if (perimeter != null && next != null)
{
mxRectangle bounds = GetPerimeterBounds(terminal, border);
if (bounds.Width > 0 || bounds.Height > 0)
{
point = perimeter(bounds, terminal, next, orthogonal);
}
}
if (point == null)
{
point = GetPoint(terminal);
}
}
return(point);
}
/// <summary>
/// Returns the absolute, cummulated origin for the children inside the
/// given parent.
/// </summary>
public mxPoint GetOrigin(Object cell)
{
mxPoint result = null;
if (cell != null)
{
result = GetOrigin(GetParent(cell));
if (!IsEdge(cell))
{
mxGeometry geo = GetGeometry(cell);
if (geo != null)
{
result.X += geo.X;
result.Y += geo.Y;
}
}
}
else
{
result = new mxPoint();
}
return(result);
}
/// <summary>
/// Parses the bounds, absolute points and label information from the style
/// of the state into its respective fields and returns the label of the
/// cell.
/// </summary>
public string ParseState(mxCellState state, bool edge)
{
Dictionary <string, object> style = state.Style;
// Parses the bounds
state.X = mxUtils.GetDouble(style, "x");
state.Y = mxUtils.GetDouble(style, "y");
state.Width = mxUtils.GetDouble(style, "width");
state.Height = mxUtils.GetDouble(style, "height");
// Parses the absolute points list
List <mxPoint> pts = ParsePoints(mxUtils.GetString(style, "points"));
if (pts.Count > 0)
{
state.AbsolutePoints = pts;
}
// Parses the label and label bounds
string label = mxUtils.GetString(style, "label");
if (label != null && label.Length > 0)
{
mxPoint offset = new mxPoint(mxUtils.GetDouble(style, "dx"),
mxUtils.GetDouble(style, "dy"));
mxRectangle vertexBounds = (!edge) ? state : null;
state.LabelBounds = mxUtils.GetLabelPaintBounds(label, style,
mxUtils.IsTrue(style, "html", false), offset, vertexBounds,
scale);
}
return(label);
}
/// <summary>
///
/// </summary>
public void QuadTo(double x1, double y1, double x2, double y2)
{
if (currentPath != null)
{
mxPoint nextPoint = new mxPoint((state.dx + x2) * state.scale,
(state.dy + y2) * state.scale);
if (lastPoint != null)
{
double cpx0 = lastPoint.X;
double cpy0 = lastPoint.Y;
double qpx1 = (state.dx + x1) * state.scale;
double qpy1 = (state.dy + y1) * state.scale;
double cpx1 = cpx0 + 2f / 3f * (qpx1 - cpx0);
double cpy1 = cpy0 + 2f / 3f * (qpy1 - cpy0);
double cpx2 = nextPoint.X + 2f / 3f * (qpx1 - nextPoint.X);
double cpy2 = nextPoint.Y + 2f / 3f * (qpy1 - nextPoint.Y);
currentPath.AddBezier((float)cpx0, (float)cpy0,
(float)cpx1, (float)cpy1, (float)cpx2, (float)cpy2,
(float)nextPoint.X, (float)nextPoint.Y);
}
lastPoint = nextPoint;
}
}
/// <summary>
///
/// </summary>
public void MoveTo(double x, double y)
{
if (currentPath != null)
{
// StartFigure avoids connection between last figure and new figure
currentPath.StartFigure();
lastPoint = new mxPoint((state.dx + x) * state.scale, (state.dy + y) * state.scale);
}
}
/// <summary>
/// Inner helper method to update the parent of the specified edge to the
/// nearest-common-ancestor of its two terminals.
/// </summary>
/// <param name="edge">Specifies the edge to be updated.</param>
/// <param name="root">Current root of the model.</param>
public void UpdateEdgeParent(Object edge, Object root)
{
Object source = GetTerminal(edge, true);
Object target = GetTerminal(edge, false);
Object cell = null;
// Uses the first non-relative descendants of the source terminal
while (source != null && !IsEdge(source) &&
GetGeometry(source) != null && GetGeometry(source).Relative)
{
source = GetParent(source);
}
// Uses the first non-relative descendants of the target terminal
while (target != null && !IsEdge(target) &&
GetGeometry(target) != null && GetGeometry(target).Relative)
{
target = GetParent(target);
}
if (IsAncestor(root, source) &&
IsAncestor(root, target))
{
if (source == target)
{
cell = GetParent(source);
}
else
{
cell = GetNearestCommonAncestor(source, target);
}
if (cell != null &&
GetParent(cell) != root &&
GetParent(edge) != cell)
{
mxGeometry geo = GetGeometry(edge);
if (geo != null)
{
mxPoint origin1 = GetOrigin(GetParent(edge));
mxPoint origin2 = GetOrigin(cell);
double dx = origin2.X - origin1.X;
double dy = origin2.Y - origin1.Y;
geo = (mxGeometry)geo.Clone();
geo.Translate(-dx, -dy);
SetGeometry(edge, geo);
}
Add(cell, edge, GetChildCount(cell));
}
}
}
/// <summary>
/// Returns true if the given object equals this point.
/// </summary>
/// <returns>Returns true if obj is equal.</returns>
new public Boolean Equals(Object obj)
{
if (obj is mxPoint)
{
mxPoint pt = (mxPoint)obj;
return(pt.X == X &&
pt.Y == Y);
}
return(false);
}
/// <summary>
/// Sets the sourcePoint or targetPoint to the given point and returns the
/// new point.
/// </summary>
/// <param name="point">Point to be used as the new source or target point.</param>
/// <param name="source">Boolean that specifies if the source or target point
/// should be set.</param>
/// <returns>Returns the new point.</returns>
public mxPoint SetTerminalPoint(mxPoint point, bool source)
{
if (source)
{
sourcePoint = point;
}
else
{
targetPoint = point;
}
return(point);
}
/// <summary>
/// Updates the absolute terminal point in the given state for the given
/// start and end state, where start is the source if source is true.
/// </summary>
/// <param name="edge">State whose terminal point should be updated.</param>
/// <param name="start">for the terminal on "this" side of the edge.</param>
/// <param name="end">for the terminal on the other side of the edge.</param>
/// <param name="source">Boolean indicating if start is the source terminal state.</param>
public void UpdateFloatingTerminalPoint(mxCellState edge, mxCellState start,
mxCellState end, bool source)
{
start = GetTerminalPort(edge, start, source);
mxPoint next = GetNextPoint(edge, end, source);
double border = mxUtils.GetDouble(edge.Style, mxConstants.STYLE_PERIMETER_SPACING);
border += mxUtils.GetDouble(edge.Style, (source) ?
mxConstants.STYLE_SOURCE_PERIMETER_SPACING :
mxConstants.STYLE_TARGET_PERIMETER_SPACING);
mxPoint pt = GetPerimeterPoint(start, next, graph.IsOrthogonal(edge), border);
edge.SetAbsoluteTerminalPoint(pt, source);
}
/// <summary>
///
/// </summary>
public void LineTo(double x, double y)
{
if (currentPath != null)
{
mxPoint nextPoint = new mxPoint((state.dx + x) * state.scale, (state.dy + y) * state.scale);
if (lastPoint != null)
{
currentPath.AddLine((float)lastPoint.X, (float)lastPoint.Y,
(float)nextPoint.X, (float)nextPoint.Y);
}
lastPoint = nextPoint;
}
}
/// <summary>
/// Updates the terminal points in the given state after the edge style was
/// computed for the edge.
/// </summary>
/// <param name="state">State whose terminal points should be updated.</param>
/// <param name="source">State that represents the source terminal.</param>
/// <param name="target">State that represents the target terminal.</param>
public void UpdateFloatingTerminalPoints(mxCellState state, mxCellState source, mxCellState target)
{
mxPoint p0 = state.AbsolutePoints[0];
mxPoint pe = state.AbsolutePoints[state.AbsolutePointCount() - 1];
if (pe == null && target != null)
{
UpdateFloatingTerminalPoint(state, target, source, false);
}
if (p0 == null && source != null)
{
UpdateFloatingTerminalPoint(state, source, target, true);
}
}
/// <summary>
/// Returns the nearest point in the list of absolute points or the center
/// of the opposite terminal.
/// </summary>
/// <param name="edge">State that represents the edge.</param>
/// <param name="opposite">State that represents the opposite terminal.</param>
/// <param name="source">Boolean indicating if the next point for the source or target
/// should be returned.</param>
public mxPoint GetNextPoint(mxCellState edge, mxCellState opposite, bool source)
{
List <mxPoint> pts = edge.AbsolutePoints;
mxPoint point = null;
if (pts != null && pts.Count >= 2)
{
int count = pts.Count;
int index = (source) ? Math.Min(1, count - 1) : Math.Max(0, count - 2);
point = pts[index];
}
if (point == null && opposite != null)
{
point = new mxPoint(opposite.GetCenterX(), opposite.GetCenterY());
}
return(point);
}
/// <summary>
///
/// </summary>
public void CurveTo(double x1, double y1, double x2, double y2, double x3,
double y3)
{
if (currentPath != null)
{
mxPoint nextPoint = new mxPoint((state.dx + x3) * state.scale, (state.dy + y3) * state.scale);
if (lastPoint != null)
{
currentPath.AddBezier((float)lastPoint.X, (float)lastPoint.Y,
(float)((state.dx + x1) * state.scale),
(float)((state.dy + y1) * state.scale),
(float)((state.dx + x2) * state.scale),
(float)((state.dy + y2) * state.scale),
(float)nextPoint.X, (float)nextPoint.Y);
}
lastPoint = nextPoint;
}
}
/// <summary>
/// Translates the geometry by the specified amount. That is, x and y of the
/// geometry, the sourcePoint, targetPoint and all elements of points are
/// translated by the given amount. X and y are only translated if the
/// geometry is not relative. If TRANSLATE_CONTROL_POINTS is false, then
/// are not modified by this function.
/// </summary>
/// <param name="dx">Integer that specifies the x-coordinate of the translation.</param>
/// <param name="dy">Integer that specifies the y-coordinate of the translation.</param>
public void Translate(double dx, double dy)
{
// Translates the geometry
if (!Relative)
{
x += dx;
y += dy;
}
// Translates the source point
if (sourcePoint != null)
{
sourcePoint.X += dx;
sourcePoint.Y += dy;
}
// Translates the target point
if (targetPoint != null)
{
targetPoint.X += dx;
targetPoint.Y += dy;
}
// Translate the control points
if (TRANSLATE_CONTROL_POINTS &&
points != null)
{
int count = points.Count;
for (int i = 0; i < count; i++)
{
mxPoint pt = points[i];
pt.X += dx;
pt.Y += dy;
}
}
}
/// <summary>
/// Sets the first or last point in the list of points depending on source.
/// </summary>
/// <param name="point">Point that represents the terminal point.</param>
/// <param name="source">Boolean that specifies if the first or last point should
/// be assigned.</param>
public void SetAbsoluteTerminalPoint(mxPoint point, bool source)
{
if (source)
{
if (absolutePoints == null)
{
absolutePoints = new List <mxPoint>();
}
if (absolutePoints == null ||
absolutePoints.Count == 0)
{
absolutePoints.Add(point);
}
else
{
absolutePoints[0] = point;
}
}
else
{
if (absolutePoints == null)
{
absolutePoints = new List <mxPoint>();
absolutePoints.Add(null);
absolutePoints.Add(point);
}
else if (absolutePoints.Count == 1)
{
absolutePoints.Add(point);
}
else
{
absolutePoints[absolutePoints.Count - 1] = point;
}
}
}
/// <summary>
/// Constructs a copy of the given geometry.
/// </summary>
/// <param name="geometry">Geometry to construct a copy of.</param>
public mxGeometry(mxGeometry geometry)
: base(geometry.X, geometry.Y, geometry.Width, geometry
.Height)
{
if (geometry.points != null)
{
points = new List <mxPoint>(geometry.points.Count);
foreach (mxPoint pt in geometry.points)
{
points.Add(pt.Clone());
}
}
if (geometry.sourcePoint != null)
{
sourcePoint = geometry.sourcePoint.Clone();
}
if (geometry.targetPoint != null)
{
targetPoint = geometry.targetPoint.Clone();
}
if (geometry.offset != null)
{
offset = geometry.offset.Clone();
}
if (geometry.alternateBounds != null)
{
alternateBounds = geometry.alternateBounds.Clone();
}
relative = geometry.relative;
}
/// <summary>
/// Sets the fixed source or target terminal point on the given edge.
/// </summary>
/// <param name="edge">State whose terminal point should be updated.</param>
/// <param name="terminal">State which represents the actual terminal.</param>
/// <param name="source">Boolean that specifies if the terminal is the source.</param>
/// <param name="constraint">Constraint that specifies the connection.</param>
public void UpdateFixedTerminalPoint(mxCellState edge, mxCellState terminal,
bool source, mxConnectionConstraint constraint)
{
mxPoint pt = null;
if (constraint != null)
{
pt = graph.GetConnectionPoint(terminal, constraint);
}
if (pt == null && terminal == null)
{
mxPoint orig = edge.Origin;
mxGeometry geo = graph.GetCellGeometry(edge.Cell);
pt = geo.GetTerminalPoint(source);
if (pt != null)
{
pt = new mxPoint(scale * (translate.X + pt.X + orig.X),
scale * (translate.Y + pt.Y + orig.Y));
}
}
edge.SetAbsoluteTerminalPoint(pt, source);
}
/// <summary>
/// Returns a point that defines the location of the intersection point between
/// the perimeter and the line between the center of the shape and the given point.
/// </summary>
public mxPoint GetPerimeterPoint(mxCellState terminal, mxPoint next, bool orthogonal)
{
return(GetPerimeterPoint(terminal, next, orthogonal, 0));
}
/// <summary>
///
/// </summary>
public void QuadTo(double x1, double y1, double x2, double y2)
{
if (currentPath != null)
{
mxPoint nextPoint = new mxPoint(state.dx + x2 * state.scale,
state.dy + y2 * state.scale);
if (lastPoint != null)
{
double cpx0 = lastPoint.X;
double cpy0 = lastPoint.Y;
double qpx1 = state.dx + x1 * state.scale;
double qpy1 = state.dy + y1 * state.scale;
double cpx1 = cpx0 + 2f/3f * (qpx1 - cpx0);
double cpy1 = cpy0 + 2f/3f * (qpy1 - cpy0);
double cpx2 = nextPoint.X + 2f/3f * (qpx1 - nextPoint.X);
double cpy2 = nextPoint.Y + 2f/3f * (qpy1 - nextPoint.Y);
currentPath.AddBezier((float)cpx0, (float)cpy0,
(float)cpx1, (float)cpy1, (float)cpx2, (float)cpy2,
(float)nextPoint.X, (float)nextPoint.Y);
}
lastPoint = nextPoint;
}
}
/// <summary>
/// Validates the bounds of the given parent's child using the given parent
/// state as the origin for the child. The validation is carried out
/// recursively for all non-collapsed descendants.
/// </summary>
/// <param name="parentState">Cell state for the given parent.</param>
/// <param name="cell">Cell for which the bounds in the state should be updated.</param>
public void ValidateBounds(mxCellState parentState, Object cell)
{
mxIGraphModel model = graph.Model;
mxCellState state = GetState(cell, true);
if (state != null)
{
if (!graph.IsCellVisible(cell))
{
RemoveState(cell);
}
else if (parentState != null)
{
state.AbsoluteOffset.X = 0;
state.AbsoluteOffset.Y = 0;
state.Origin = new mxPoint(parentState.Origin.X,
parentState.Origin.Y);
mxGeometry geo = graph.GetCellGeometry(cell);
if (geo != null)
{
if (!model.IsEdge(cell))
{
mxPoint origin = state.Origin;
mxPoint offset = geo.Offset;
if (offset == null)
{
offset = EMPTY_POINT;
}
if (geo.Relative)
{
origin.X += geo.X * parentState.Width /
Scale + offset.X;
origin.Y += geo.Y * parentState.Height /
Scale + offset.Y;
}
else
{
state.AbsoluteOffset = new mxPoint(
scale * offset.X,
scale * offset.Y);
origin.X += geo.X;
origin.Y += geo.Y;
}
}
// Updates the cell state's bounds
state.X = scale * (translate.X + state.Origin.X);
state.Y = scale * (translate.Y + state.Origin.Y);
state.Width = scale * geo.Width;
state.Height = scale * geo.Height;
if (model.IsVertex(cell))
{
UpdateVertexLabelOffset(state);
}
}
}
// Applies child offset to origin
mxPoint childOffset = graph.GetChildOffsetForCell(cell);
if (childOffset != null)
{
state.Origin.X += childOffset.X;
state.Origin.Y += childOffset.Y;
}
}
// Recursively validates the child bounds
if (state != null &&
!graph.IsCellCollapsed(cell))
{
int childCount = model.GetChildCount(cell);
for (int i = 0; i < childCount; i++)
{
ValidateBounds(state, model.GetChildAt(cell, i));
}
}
}
/// <summary>
///
/// </summary>
public void MoveTo(double x, double y)
{
if (currentPath != null)
{
// StartFigure avoids connection between last figure and new figure
currentPath.StartFigure();
lastPoint = new mxPoint(state.dx + x * state.scale, state.dy + y * state.scale);
}
}
/// <summary>
///
/// </summary>
public void CurveTo(double x1, double y1, double x2, double y2, double x3,
double y3)
{
if (currentPath != null)
{
mxPoint nextPoint = new mxPoint(state.dx + x3 * state.scale, state.dy + y3 * state.scale);
if (lastPoint != null)
{
currentPath.AddBezier((float)lastPoint.X, (float)lastPoint.Y,
(float)(state.dx + x1 * state.scale),
(float)(state.dy + y1 * state.scale),
(float)(state.dx + x2 * state.scale),
(float)(state.dy + y2 * state.scale),
(float)nextPoint.X, (float)nextPoint.Y);
}
lastPoint = nextPoint;
}
}
/// <summary>
/// Returns the paint bounds for the given label.
/// </summary>
/// <returns></returns>
public static mxRectangle GetLabelPaintBounds(String label,
Dictionary<string, Object> style, bool isHtml, mxPoint offset,
mxRectangle vertexBounds, double scale)
{
bool horizontal = mxUtils.IsTrue(style, mxConstants.STYLE_HORIZONTAL, true);
int w = 0;
if (vertexBounds != null &&
GetString(style, mxConstants.STYLE_WHITE_SPACE, "nowrap").Equals("wrap"))
{
if (horizontal)
{
w = (int)(vertexBounds.Width / scale);
}
else
{
w = (int)(vertexBounds.Height / scale);
}
}
mxRectangle size = mxUtils.GetLabelSize(label, style, w);
double x = offset.X;
double y = offset.Y;
double width = 0;
double height = 0;
if (vertexBounds != null)
{
x += vertexBounds.X;
y += vertexBounds.Y;
// Limits the label to the swimlane title
if (mxUtils.GetString(style, mxConstants.STYLE_SHAPE, "").Equals(
mxConstants.SHAPE_SWIMLANE))
{
double start = mxUtils.GetDouble(style, mxConstants.STYLE_STARTSIZE,
mxConstants.DEFAULT_STARTSIZE) * scale;
if (horizontal)
{
width += vertexBounds.Width;
height += start;
}
else
{
width += start;
height += vertexBounds.Height;
}
}
else
{
width += vertexBounds.Width;
height += vertexBounds.Height;
}
}
return mxUtils.GetScaledLabelBounds(x, y,
size, width, height, style, scale);
}
/// <summary>
/// Returns a point that defines the location of the intersection point between
/// the perimeter and the line between the center of the shape and the given point.
/// </summary>
/// <param name="terminal">State for the source or target terminal.</param>
/// <param name="next">Point that lies outside of the given terminal.</param>
/// <param name="orthogonal">Specifies if the orthogonal projection onto
/// the perimeter should be returned. If this is false then the intersection
/// of the perimeter and the line between the next and the center point is
/// returned.</param>
/// <param name="border">Optional border between the perimeter and the shape.</param>
public mxPoint GetPerimeterPoint(mxCellState terminal, mxPoint next, bool orthogonal, double border)
{
mxPoint point = null;
if (terminal != null)
{
mxPerimeterFunction perimeter = GetPerimeterFunction(terminal);
if (perimeter != null && next != null)
{
mxRectangle bounds = GetPerimeterBounds(terminal, border);
if (bounds.Width > 0 || bounds.Height > 0)
{
point = perimeter(bounds, terminal, next, orthogonal);
}
}
if (point == null)
{
point = GetPoint(terminal);
}
}
return point;
}
/// <summary>
/// Returns the nearest point in the list of absolute points or the center
/// of the opposite terminal.
/// </summary>
/// <param name="vertex">Cell state that represents the vertex.</param>
/// <param name="constraint">Connection constraint that represents the connection
/// point constraint as returned by getConnectionConstraint.</param>
public mxPoint GetConnectionPoint(mxCellState vertex, mxConnectionConstraint constraint)
{
mxPoint point = null;
if (vertex != null &&
constraint.Point != null)
{
point = new mxPoint(vertex.X + constraint.Point.X * vertex.Width,
vertex.Y + constraint.Point.Y * vertex.Height);
}
if (point != null &&
constraint.Perimeter)
{
point = View.GetPerimeterPoint(vertex, point, false);
}
return point;
}
/// <summary>
/// Rotates the given point by the given cos and sin.
/// </summary>
public static mxPoint GetRotatedPoint(mxPoint pt, double cos, double sin,
mxPoint c)
{
double x = pt.X - c.X;
double y = pt.Y - c.Y;
double x1 = x * cos - y * sin;
double y1 = y * cos + x * sin;
return new mxPoint(x1 + c.X, y1 + c.Y);
}
/// <summary>
/// Draws the given lines as segments between all points of the given list
/// of mxPoints.
/// </summary>
/// <param name="pts">List of points that define the line.</param>
/// <param name="style">Style to be used for painting the line.</param>
public void DrawLine(List<mxPoint> pts, Dictionary<string, Object> style)
{
Color? penColor = mxUtils.GetColor(style, mxConstants.STYLE_STROKECOLOR, Color.Black);
float penWidth = mxUtils.GetFloat(style, mxConstants.STYLE_STROKEWIDTH, 1);
Boolean rounded = mxUtils.IsTrue(style, mxConstants.STYLE_ROUNDED, false);
if (penColor != null && penWidth > 0)
{
Pen pen = new Pen((Color)penColor, (float)(penWidth * scale));
if (mxUtils.IsTrue(style, mxConstants.STYLE_DASHED, false))
{
float[] tmp = { (float)(3 * scale), (float)(3 * scale) };
pen.DashPattern = tmp;
}
// Draws the shape
string shape = mxUtils.GetString(style, mxConstants.STYLE_SHAPE, "");
switch (shape)
{
case (mxConstants.SHAPE_ARROW):
{
// Base vector (between end points)
mxPoint p0 = pts[0];
mxPoint pe = pts[pts.Count - 1];
int x = (int) Math.Min(p0.X, pe.X);
int y = (int) Math.Min(p0.Y, pe.Y);
int x1 = (int) Math.Max(p0.X, pe.X);
int y1 = (int) Math.Max(p0.Y, pe.Y);
int w = x1 - x;
int h = y1 - y;
Rectangle bounds = new Rectangle(x, y, w, h);
bool shadow = mxUtils.IsTrue(style, mxConstants.STYLE_SHADOW, false);
Color? fillColor = mxUtils.GetColor(style, mxConstants.STYLE_FILLCOLOR);
float opacity = mxUtils.GetFloat(style, mxConstants.STYLE_OPACITY, 100);
int alpha = (int)(255 * opacity / 100);
Brush brush = null;
if (fillColor != null)
{
Color fill = (Color)fillColor;
if (opacity != 100)
{
fill = Color.FromArgb(alpha, fill.R, fill.G, fill.B);
}
Color? gradientColor = mxUtils.GetColor(style, mxConstants.STYLE_GRADIENTCOLOR);
if (gradientColor != null)
{
String gradientDirection = mxUtils.GetString(style,
mxConstants.STYLE_GRADIENT_DIRECTION);
LinearGradientMode mode = LinearGradientMode.ForwardDiagonal;
if (gradientDirection != null
&& !gradientDirection
.Equals(mxConstants.DIRECTION_SOUTH))
{
if (gradientDirection.Equals(mxConstants.DIRECTION_EAST))
{
mode = LinearGradientMode.BackwardDiagonal;
}
else if (gradientDirection.Equals(mxConstants.DIRECTION_NORTH))
{
mode = LinearGradientMode.Horizontal;
}
else if (gradientDirection.Equals(mxConstants.DIRECTION_WEST))
{
mode = LinearGradientMode.Vertical;
}
}
brush = new LinearGradientBrush(bounds, fill, (Color)gradientColor, mode);
}
else
{
brush = new SolidBrush(fill);
}
}
// Geometry of arrow
double spacing = mxConstants.ARROW_SPACING * scale;
double width = mxConstants.ARROW_WIDTH * scale;
double arrow = mxConstants.ARROW_SIZE * scale;
double dx = pe.X - p0.X;
double dy = pe.Y - p0.Y;
double dist = Math.Sqrt(dx * dx + dy * dy);
double length = dist - 2 * spacing - arrow;
// Computes the norm and the inverse norm
double nx = dx / dist;
double ny = dy / dist;
double basex = length * nx;
double basey = length * ny;
double floorx = width * ny / 3;
double floory = -width * nx / 3;
// Computes points
double p0x = p0.X - floorx / 2 + spacing * nx;
double p0y = p0.Y - floory / 2 + spacing * ny;
double p1x = p0x + floorx;
double p1y = p0y + floory;
double p2x = p1x + basex;
double p2y = p1y + basey;
double p3x = p2x + floorx;
double p3y = p2y + floory;
// p4 not necessary
double p5x = p3x - 3 * floorx;
double p5y = p3y - 3 * floory;
Point[] poly = new Point[]{
new Point((int) p0x, (int) p0y),
new Point((int) p1x, (int) p1y),
new Point((int) p2x, (int) p2y),
new Point((int) p3x, (int) p3y),
new Point((int) (pe.X - spacing * nx), (int) (pe
.Y - spacing * ny)),
new Point((int) p5x, (int) p5y),
new Point((int) (p5x + floorx), (int) (p5y + floory))};
DrawPolygon(poly, brush, pen, shadow);
break;
}
default:
{
// TODO: Move code into DrawConnector method
// Draws the start marker
Object marker = mxUtils.GetString(style, mxConstants.STYLE_STARTARROW);
mxPoint p0 = pts[0];
mxPoint pt = pts[1];
mxPoint offset = null;
if (marker != null)
{
float size = (float) (mxUtils.GetFloat(style, mxConstants.STYLE_STARTSIZE,
mxConstants.DEFAULT_MARKERSIZE));
offset = DrawMarker(marker, pt, p0, size, pen);
}
else
{
double dx = pt.X - p0.X;
double dy = pt.Y - p0.Y;
double dist = Math.Max(1, Math.Sqrt(dx * dx + dy * dy));
double nx = dx * penWidth * scale / dist;
double ny = dy * penWidth * scale / dist;
offset = new mxPoint(nx / 2, ny / 2);
}
// Applies offset to point
if (offset != null)
{
p0 = p0.Clone();
p0.X += offset.X;
p0.Y += offset.Y;
offset = null;
}
// Draws the end marker
marker = mxUtils.GetString(style, mxConstants.STYLE_ENDARROW);
mxPoint pe = pts[pts.Count - 1];
pt = pts[pts.Count - 2];
if (marker != null)
{
float size = (float) (mxUtils.GetFloat(style, mxConstants.STYLE_ENDSIZE,
mxConstants.DEFAULT_MARKERSIZE));
offset = DrawMarker(marker, pt, pe, size, pen);
}
else
{
double dx = pt.X - p0.X;
double dy = pt.Y - p0.Y;
double dist = Math.Max(1, Math.Sqrt(dx * dx + dy * dy));
double nx = dx * penWidth * scale / dist;
double ny = dy * penWidth * scale / dist;
offset = new mxPoint(nx / 2, ny / 2);
}
// Applies offset to the point
if (offset != null)
{
pe = pe.Clone();
pe.X += offset.X;
pe.Y += offset.Y;
offset = null;
}
// Draws the line using a GraphicsPath
GraphicsPath path = new GraphicsPath();
double arcSize = mxConstants.LINE_ARCSIZE * scale;
pt = p0;
for (int i = 1; i < pts.Count - 1; i++)
{
mxPoint tmp = pts[i];
double dx = pt.X - tmp.X;
double dy = pt.Y - tmp.Y;
if ((rounded && i < pts.Count - 1) && (dx != 0 || dy != 0)
&& scale > 0.3)
{
// Draws a line from the last point to the current point with a
// spacing of size off the current point into direction of the
// last point
double dist = Math.Sqrt(dx * dx + dy * dy);
double nx1 = dx * Math.Min(arcSize, dist / 2) / dist;
double ny1 = dy * Math.Min(arcSize, dist / 2) / dist;
path.AddLine((float)(pt.X), (float)(pt.Y),
(float)(tmp.X + nx1), (float)(tmp.Y + ny1));
// Draws a line from the last point to the current point with a
// spacing of size off the current point into direction of the
// last point
mxPoint next = pts[i + 1];
dx = next.X - tmp.X;
dy = next.Y - tmp.Y;
dist = Math.Max(1, Math.Sqrt(dx * dx + dy * dy));
double nx2 = dx * Math.Min(arcSize, dist / 2) / dist;
double ny2 = dy * Math.Min(arcSize, dist / 2) / dist;
path.AddBezier(
(float)(tmp.X + nx1), (float)(tmp.Y + ny1),
(float)(tmp.X), (float)(tmp.Y),
(float)(tmp.X), (float)(tmp.Y),
(float)(tmp.X + nx2), (float)(tmp.Y + ny2));
tmp = new mxPoint(tmp.X + nx2, tmp.Y + ny2);
}
else
{
path.AddLine((float)(pt.X), (float)(pt.Y), (float)(tmp.X), (float)(tmp.Y));
}
pt = tmp;
}
path.AddLine((float)(pt.X), (float)(pt.Y), (float)(pe.X), (float)(pe.Y));
g.DrawPath(pen, path);
break;
}
}
}
}
/// <summary>
/// Draws the given type of marker.
/// </summary>
/// <param name="type"></param>
/// <param name="p0"></param>
/// <param name="pe"></param>
/// <param name="size"></param>
/// <param name="pen"></param>
/// <returns></returns>
public mxPoint DrawMarker(Object type, mxPoint p0, mxPoint pe, float size, Pen pen)
{
Brush brush = new SolidBrush(pen.Color);
float strokeWidth = (float) (pen.Width / scale);
mxPoint offset = null;
// Computes the norm and the inverse norm
double dx = pe.X - p0.X;
double dy = pe.Y - p0.Y;
double dist = Math.Max(1, Math.Sqrt(dx * dx + dy * dy));
double absSize = size * scale;
double nx = dx * absSize / dist;
double ny = dy * absSize / dist;
pe = (mxPoint)pe.Clone();
pe.X -= nx * strokeWidth / (2 * size);
pe.Y -= ny * strokeWidth / (2 * size);
nx *= 0.5 + strokeWidth / 2;
ny *= 0.5 + strokeWidth / 2;
if (type.Equals(mxConstants.ARROW_CLASSIC))
{
GraphicsPath path = new GraphicsPath();
path.AddLines(new Point[]{
new Point((int)Math.Round(pe.X), (int)Math.Round(pe.Y)),
new Point((int)Math.Round(pe.X - nx - ny / 2),
(int)Math.Round(pe.Y - ny + nx / 2)),
new Point((int)Math.Round(pe.X - nx * 3 / 4),
(int)Math.Round(pe.Y - ny * 3 / 4)),
new Point((int)Math.Round(pe.X + ny / 2 - nx),
(int)Math.Round(pe.Y - ny - nx / 2))});
path.CloseFigure();
g.FillPath(brush, path);
g.DrawPath(pen, path);
offset = new mxPoint(-nx * 3 / 4, -ny * 3 / 4);
}
else if (type.Equals(mxConstants.ARROW_BLOCK))
{
GraphicsPath path = new GraphicsPath();
path.AddLines(new Point[]{
new Point((int)Math.Round(pe.X), (int)Math.Round(pe.Y)),
new Point((int)Math.Round(pe.X - nx - ny / 2),
(int)Math.Round(pe.Y - ny + nx / 2)),
new Point((int)Math.Round(pe.X + ny / 2 - nx),
(int)Math.Round(pe.Y - ny - nx / 2))});
path.CloseFigure();
g.FillPath(brush, path);
g.DrawPath(pen, path);
offset = new mxPoint(-nx * 3 / 4, -ny * 3 / 4);
}
else if (type.Equals(mxConstants.ARROW_OPEN))
{
nx *= 1.2;
ny *= 1.2;
g.DrawLine(pen, (int)Math.Round(pe.X - nx - ny / 2),
(int)Math.Round(pe.Y - ny + nx / 2),
(int)Math.Round(pe.X - nx / 6),
(int)Math.Round(pe.Y - ny / 6));
g.DrawLine(pen, (int)Math.Round(pe.X - nx / 6),
(int)Math.Round(pe.Y - ny / 6),
(int)Math.Round(pe.X + ny / 2 - nx),
(int)Math.Round(pe.Y - ny - nx / 2));
offset = new mxPoint(-nx / 4, -ny / 4);
}
else if (type.Equals(mxConstants.ARROW_OVAL))
{
nx *= 1.2;
ny *= 1.2;
absSize *= 1.2;
int cx = (int)Math.Round(pe.X - nx / 2);
int cy = (int)Math.Round(pe.Y - ny / 2);
int a = (int)Math.Round(absSize / 2);
int a2 = (int)Math.Round(absSize);
g.FillEllipse(brush, cx - a, cy - a, a2, a2);
g.DrawEllipse(pen, cx - a, cy - a, a2, a2);
offset = new mxPoint(-nx / 2, -ny / 2);
}
else if (type.Equals(mxConstants.ARROW_DIAMOND))
{
nx *= 1.2;
ny *= 1.2;
Point[] poly = new Point[]{
new Point((int)Math.Round(pe.X + nx / 2),
(int)Math.Round(pe.Y + ny / 2)),
new Point((int)Math.Round(pe.X - ny / 2),
(int)Math.Round(pe.Y + nx / 2)),
new Point((int)Math.Round(pe.X - nx / 2),
(int)Math.Round(pe.Y - ny / 2)),
new Point((int)Math.Round(pe.X + ny / 2),
(int)Math.Round(pe.Y - nx / 2))};
g.FillPolygon(brush, poly);
g.DrawPolygon(pen, poly);
}
return offset;
}
/// <summary>
/// Transforms the given control point to an absolute point.
/// </summary>
public mxPoint TransformControlPoint(mxCellState state, mxPoint pt)
{
mxPoint orig = state.Origin;
return new mxPoint(scale * (pt.X + translate.X + orig.X),
scale * (pt.Y + translate.Y + orig.Y));
}
/// <summary>
///
/// </summary>
public void Begin()
{
currentPath = new GraphicsPath();
lastPoint = null;
}
/// <summary>
/// Returns the bounding box of the rotated rectangle.
/// </summary>
public static mxRectangle GetBoundingBox(mxRectangle rect, double rotation)
{
// TODO: Check use of GraphicsPath (see mxGdiCanvas.DrawText)
mxRectangle result = null;
if (rect != null && rotation != 0)
{
double rad = ToRadians(rotation);
double cos = Math.Cos(rad);
double sin = Math.Sin(rad);
mxPoint cx = new mxPoint(rect.X + rect.Width / 2,
rect.Y + rect.Height / 2);
mxPoint p1 = new mxPoint(rect.X, rect.Y);
mxPoint p2 = new mxPoint(rect.X + rect.Width, rect.Y);
mxPoint p3 = new mxPoint(p2.X, rect.Y + rect.Height);
mxPoint p4 = new mxPoint(rect.X, p3.Y);
p1 = GetRotatedPoint(p1, cos, sin, cx);
p2 = GetRotatedPoint(p2, cos, sin, cx);
p3 = GetRotatedPoint(p3, cos, sin, cx);
p4 = GetRotatedPoint(p4, cos, sin, cx);
result = new mxRectangle((int)p1.X, (int)p1.Y, 0,
0);
result.Add(new mxRectangle(p2.X, p2.Y, 0, 0));
result.Add(new mxRectangle(p3.X, p3.Y, 0, 0));
result.Add(new mxRectangle(p4.X, p4.Y, 0, 0));
}
return result;
}
/// <summary>
/// Validates the points for the state of the given cell recursively if the
/// cell is not collapsed and returns the bounding box of all visited states
/// as a rectangle.
/// </summary>
public mxRectangle ValidatePoints(mxCellState parentState, Object cell)
{
mxIGraphModel model = graph.Model;
mxCellState state = GetState(cell);
mxRectangle bbox = null;
if (state != null)
{
mxGeometry geo = graph.GetCellGeometry(cell);
if (geo != null && model.IsEdge(cell))
{
// Updates the points on the source terminal if its an edge
mxCellState source = GetState(GetVisibleTerminal(cell, true));
if (source != null && model.IsEdge(source.Cell) &&
!model.IsAncestor(source, cell))
{
mxCellState tmp = GetState(model.GetParent(source.Cell));
ValidatePoints(tmp, source.Cell);
}
// Updates the points on the target terminal if its an edge
mxCellState target = GetState(GetVisibleTerminal(cell, false));
if (target != null && model.IsEdge(target.Cell) &&
!model.IsAncestor(target.Cell, cell))
{
mxCellState tmp = GetState(model.GetParent(target.Cell));
ValidatePoints(tmp, target.Cell);
}
UpdateFixedTerminalPoints(state, source, target);
UpdatePoints(state, geo.Points, source, target);
UpdateFloatingTerminalPoints(state, source, target);
UpdateEdgeBounds(state);
state.AbsoluteOffset = GetPoint(state, geo);
}
else if (geo != null &&
geo.Relative &&
parentState != null &&
model.IsEdge(parentState.Cell))
{
mxPoint origin = GetPoint(parentState, geo);
if (origin != null)
{
state.X = origin.X;
state.Y = origin.Y;
origin.X = (origin.X / scale) - translate.X;
origin.Y = (origin.Y / scale) - translate.Y;
state.Origin = origin;
childMoved(parentState, state);
}
}
if (model.IsEdge(cell) || model.IsVertex(cell))
{
UpdateLabelBounds(state);
bbox = new mxRectangle(UpdateBoundingBox(state));
}
}
if (state != null && !graph.IsCellCollapsed(cell))
{
int childCount = model.GetChildCount(cell);
for (int i = 0; i < childCount; i++)
{
Object child = model.GetChildAt(cell, i);
mxRectangle bounds = ValidatePoints(state, child);
if (bounds != null)
{
if (bbox == null)
{
bbox = bounds;
}
else
{
bbox.Add(bounds);
}
}
}
}
return(bbox);
}
/// <summary>
/// Rotates the given point by the given cos and sin.
/// </summary>
public static mxPoint GetRotatedPoint(mxPoint pt, double cos, double sin)
{
return GetRotatedPoint(pt, cos, sin, new mxPoint());
}
/// <summary>
/// Returns the absolute, cummulated origin for the children inside the
/// given parent.
/// </summary>
public mxPoint GetOrigin(Object cell)
{
mxPoint result = null;
if (cell != null)
{
result = GetOrigin(GetParent(cell));
if (!IsEdge(cell))
{
mxGeometry geo = GetGeometry(cell);
if (geo != null)
{
result.X += geo.X;
result.Y += geo.Y;
}
}
}
else
{
result = new mxPoint();
}
return result;
}
/// <summary>
/// Returns a connection constraint that describes the given connection
/// point. This result can then be passed to getConnectionPoint.
/// </summary>
/// <param name="edge">Cell state that represents the edge.</param>
/// <param name="terminal">Cell state that represents the terminal.</param>
/// <param name="source">Boolean indicating if the terminal is the source or target.</param>
/// <returns></returns>
public mxConnectionConstraint GetConnectionConstraint(mxCellState edge, mxCellState terminal, bool source)
{
mxPoint point = null;
string key = (source) ? mxConstants.STYLE_EXIT_X : mxConstants.STYLE_ENTRY_X;
if (edge.Style.ContainsKey(key))
{
double x = mxUtils.GetDouble(edge.Style, key);
key = (source) ? mxConstants.STYLE_EXIT_Y : mxConstants.STYLE_ENTRY_Y;
if (edge.Style.ContainsKey(key))
{
double y = mxUtils.GetDouble(edge.Style, key);
point = new mxPoint(x, y);
}
}
bool perimeter = false;
if (point != null)
{
perimeter = mxUtils.IsTrue(edge.Style, (source) ?
mxConstants.STYLE_EXIT_PERIMETER :
mxConstants.STYLE_ENTRY_PERIMETER, true);
}
return new mxConnectionConstraint(point, perimeter);
}
/// <summary>
/// Constructs a new point at the location of the given point.
/// </summary>
/// <param name="point">Point that specifies the location.</param>
public mxPoint(mxPoint point) : this(point.X, point.Y)
{
}
/// <summary>
/// Parses the bounds, absolute points and label information from the style
/// of the state into its respective fields and returns the label of the
/// cell.
/// </summary>
public string ParseState(mxCellState state, bool edge)
{
Dictionary<string, object> style = state.Style;
// Parses the bounds
state.X = mxUtils.GetDouble(style, "x");
state.Y = mxUtils.GetDouble(style, "y");
state.Width = mxUtils.GetDouble(style, "width");
state.Height = mxUtils.GetDouble(style, "height");
// Parses the absolute points list
List<mxPoint> pts = ParsePoints(mxUtils.GetString(style, "points"));
if (pts.Count > 0)
{
state.AbsolutePoints = pts;
}
// Parses the label and label bounds
string label = mxUtils.GetString(style, "label");
if (label != null && label.Length > 0)
{
mxPoint offset = new mxPoint(mxUtils.GetDouble(style, "dx"),
mxUtils.GetDouble(style, "dy"));
mxRectangle vertexBounds = (!edge) ? state : null;
state.LabelBounds = mxUtils.GetLabelPaintBounds(label, style,
mxUtils.IsTrue(style, "html", false), offset, vertexBounds,
scale);
}
return label;
}
/// <summary>
/// Sets the sourcePoint or targetPoint to the given point and returns the
/// new point.
/// </summary>
/// <param name="point">Point to be used as the new source or target point.</param>
/// <param name="source">Boolean that specifies if the source or target point
/// should be set.</param>
/// <returns>Returns the new point.</returns>
public mxPoint SetTerminalPoint(mxPoint point, bool source)
{
if (source)
{
sourcePoint = point;
}
else
{
targetPoint = point;
}
return point;
}
/// <summary>
/// Returns a point that defines the location of the intersection point between
/// the perimeter and the line between the center of the shape and the given point.
/// </summary>
public mxPoint GetPerimeterPoint(mxCellState terminal, mxPoint next, bool orthogonal)
{
return GetPerimeterPoint(terminal, next, orthogonal, 0);
}
/// <summary>
///
/// </summary>
public void Begin()
{
currentPath = new GraphicsPath();
lastPoint = null;
}
/// <summary>
/// Returns the nearest point in the list of absolute points or the center
/// of the opposite terminal.
/// </summary>
/// <param name="edge">State that represents the edge.</param>
/// <param name="opposite">State that represents the opposite terminal.</param>
/// <param name="source">Boolean indicating if the next point for the source or target
/// should be returned.</param>
public mxPoint GetNextPoint(mxCellState edge, mxCellState opposite, bool source)
{
List<mxPoint> pts = edge.AbsolutePoints;
mxPoint point = null;
if (pts != null && (source || pts.Count > 2 || opposite == null))
{
int count = pts.Count;
int index = (source) ? Math.Min(1, count - 1) : Math.Max(0, count - 2);
point = pts[index];
}
if (point == null && opposite != null)
{
point = new mxPoint(opposite.GetCenterX(), opposite.GetCenterY());
}
return point;
}
/// <summary>
/// Constructs a new point at the location of the given point.
/// </summary>
/// <param name="point">Point that specifies the location.</param>
public mxPoint(mxPoint point)
: this(point.X, point.Y)
{
}
/// <summary>
/// Updates the given state using the bounding box of the absolute points.
/// Also updates terminal distance, length and segments.
/// </summary>
/// <param name="state">Cell state whose bounds should be updated.</param>
public void UpdateEdgeBounds(mxCellState state)
{
List <mxPoint> points = state.AbsolutePoints;
mxPoint p0 = points[0];
mxPoint pe = points[points.Count - 1];
if (p0 == null || pe == null)
{
// Note: This is an error that normally occurs
// if a connected edge has a null-terminal, ie.
// edge.source == null or edge.target == null.
states.Remove(state.Cell);
}
else
{
if (p0.X != pe.X || p0.Y != pe.Y)
{
double dx = pe.X - p0.X;
double dy = pe.Y - p0.Y;
state.TerminalDistance = Math.Sqrt(dx * dx + dy * dy);
}
else
{
state.TerminalDistance = 0;
}
double length = 0;
double[] segments = new double[points.Count - 1];
mxPoint pt = p0;
if (pt != null)
{
double minX = pt.X;
double minY = pt.Y;
double maxX = minX;
double maxY = minY;
for (int i = 1; i < points.Count; i++)
{
mxPoint tmp = points[i];
if (tmp != null)
{
double dx = pt.X - tmp.X;
double dy = pt.Y - tmp.Y;
double segment = Math.Sqrt(dx * dx + dy * dy);
segments[i - 1] = segment;
length += segment;
pt = tmp;
minX = Math.Min(pt.X, minX);
minY = Math.Min(pt.Y, minY);
maxX = Math.Max(pt.X, maxX);
maxY = Math.Max(pt.Y, maxY);
}
}
state.Length = length;
state.Segments = segments;
double markerSize = 1; // TODO: include marker size
state.X = minX;
state.Y = minY;
state.Width = Math.Max(markerSize, maxX - minX);
state.Height = Math.Max(markerSize, maxY - minY);
}
else
{
state.Length = 0;
}
}
}
/// <summary>
///
/// </summary>
public void LineTo(double x, double y)
{
if (currentPath != null)
{
mxPoint nextPoint = new mxPoint(state.dx + x * state.scale, state.dy + y * state.scale);
if (lastPoint != null)
{
currentPath.AddLine((float) lastPoint.X, (float) lastPoint.Y,
(float) nextPoint.X, (float) nextPoint.Y);
}
lastPoint = nextPoint;
}
}
/// <summary>
/// Sets the first or last point in the list of points depending on source.
/// </summary>
/// <param name="point">Point that represents the terminal point.</param>
/// <param name="source">Boolean that specifies if the first or last point should
/// be assigned.</param>
public void SetAbsoluteTerminalPoint(mxPoint point, bool source)
{
if (source)
{
if (absolutePoints == null)
{
absolutePoints = new List<mxPoint>();
}
if (absolutePoints == null ||
absolutePoints.Count == 0)
{
absolutePoints.Add(point);
}
else
{
absolutePoints[0] = point;
}
}
else
{
if (absolutePoints == null)
{
absolutePoints = new List<mxPoint>();
absolutePoints.Add(null);
absolutePoints.Add(point);
}
else if (absolutePoints.Count == 1)
{
absolutePoints.Add(point);
}
else
{
absolutePoints[absolutePoints.Count - 1] = point;
}
}
}
/// <summary>
/// Returns the absolute point on the edge for the given relative
/// geometry as a point. The edge is represented by the given cell state.
/// </summary>
/// <param name="state">Represents the state of the parent edge.</param>
/// <param name="geometry">Represents the relative location.</param>
public mxPoint GetPoint(mxCellState state, mxGeometry geometry)
{
double x = state.GetCenterX();
double y = state.GetCenterY();
if (state.Segments != null && (geometry == null || geometry.Relative))
{
double gx = (geometry != null) ? geometry.X / 2 : 0;
int pointCount = state.AbsolutePoints.Count;
double dist = (gx + 0.5) * state.Length;
double[] segments = state.Segments;
double segment = segments[0];
double length = 0;
int index = 1;
while (dist > length + segment && index < pointCount - 1)
{
length += segment;
segment = segments[index++];
}
double factor = (segment == 0) ? 0 : (dist - length) / segment;
mxPoint p0 = state.AbsolutePoints[index - 1];
mxPoint pe = state.AbsolutePoints[index];
if (p0 != null &&
pe != null)
{
double gy = 0;
double offsetX = 0;
double offsetY = 0;
if (geometry != null)
{
gy = geometry.Y;
mxPoint offset = geometry.Offset;
if (offset != null)
{
offsetX = offset.X;
offsetY = offset.Y;
}
}
double dx = pe.X - p0.X;
double dy = pe.Y - p0.Y;
double nx = (segment == 0) ? 0 : dy / segment;
double ny = (segment == 0) ? 0 : dx / segment;
x = p0.X + dx * factor + (nx * gy + offsetX) * scale;
y = p0.Y + dy * factor - (ny * gy - offsetY) * scale;
}
}
else if (geometry != null)
{
mxPoint offset = geometry.Offset;
if (offset != null)
{
x += offset.X;
y += offset.Y;
}
}
return(new mxPoint(x, y));
}
/// <summary>
/// Updates the given cell state.
/// </summary>
/// <param name="state"></param>
public void UpdateCellState(mxCellState state, mxCellState source, mxCellState target)
{
state.AbsoluteOffset.X = 0;
state.AbsoluteOffset.Y = 0;
state.Origin.X = 0;
state.Origin.Y = 0;
state.Length = 0;
mxIGraphModel model = graph.Model;
mxCellState pState = GetState(model.GetParent(state.Cell));
if (pState != null)
{
state.Origin.X += pState.Origin.X;
state.Origin.Y += pState.Origin.Y;
}
mxPoint offset = graph.GetChildOffsetForCell(state.Cell);
if (offset != null)
{
state.Origin.X += offset.X;
state.Origin.Y += offset.Y;
}
mxGeometry geo = graph.GetCellGeometry(state.Cell);
if (geo != null)
{
if (!model.IsEdge(state.Cell))
{
mxPoint origin = state.Origin;
offset = geo.Offset;
if (offset == null)
{
offset = EMPTY_POINT;
}
if (geo.Relative && pState != null)
{
if (model.IsEdge(pState.Cell))
{
mxPoint orig = GetPoint(pState, geo);
if (orig != null)
{
origin.X += (orig.X / scale) - pState.Origin.X - translate.X;
origin.Y += (orig.Y / scale) - pState.Origin.Y - translate.Y;
}
}
else
{
origin.X += geo.X * pState.Width / scale + offset.X;
origin.Y += geo.Y * pState.Height / scale + offset.Y;
}
}
else
{
state.AbsoluteOffset = new mxPoint(scale * offset.X,
scale * offset.Y);
origin.X += geo.X;
origin.Y += geo.Y;
}
}
state.X = scale * (translate.X + state.Origin.X);
state.Y = scale * (translate.Y + state.Origin.Y);
state.Width = scale * geo.Width;
state.Height = scale * geo.Height;
if (model.IsVertex(state.Cell))
{
UpdateVertexState(state, geo);
}
if (model.IsEdge(state.Cell))
{
UpdateEdgeState(state, geo, source, target);
}
}
}
/// <summary>
/// Constructs a copy of the given geometry.
/// </summary>
/// <param name="geometry">Geometry to construct a copy of.</param>
public mxGeometry(mxGeometry geometry)
: base(geometry.X, geometry.Y, geometry.Width, geometry
.Height)
{
if (geometry.points != null)
{
points = new List<mxPoint>(geometry.points.Count);
foreach (mxPoint pt in geometry.points)
{
points.Add(pt.Clone());
}
}
if (geometry.sourcePoint != null)
{
sourcePoint = geometry.sourcePoint.Clone();
}
if (geometry.targetPoint != null)
{
targetPoint = geometry.targetPoint.Clone();
}
if (geometry.offset != null)
{
offset = geometry.offset.Clone();
}
if (geometry.alternateBounds != null)
{
alternateBounds = geometry.alternateBounds.Clone();
}
relative = geometry.relative;
}