/// <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>
/// 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>
/// 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>
/// Creates an image for the given arguments.
/// </summary>
public static Image CreateImage(mxGraph graph, Object[] cells, double scale, Color? background,
bool antiAlias, mxRectangle clip, mxGdiCanvas graphicsCanvas)
{
mxImageCanvas canvas = (mxImageCanvas) DrawCells(graph, cells, scale, clip,
new ImageCanvasFactory(graphicsCanvas, background, antiAlias));
return canvas.Destroy();
}
/// <summary>
/// Creates an image for the given arguments.
/// </summary>
public static Image CreateImage(mxGraph graph, Object[] cells, double scale, Color?background,
bool antiAlias, mxRectangle clip, mxGdiCanvas graphicsCanvas)
{
mxImageCanvas canvas = (mxImageCanvas)DrawCells(graph, cells, scale, clip,
new ImageCanvasFactory(graphicsCanvas, background, antiAlias));
return(canvas.Destroy());
}
/// <summary>
/// First validates all bounds and then validates all points recursively on
/// all visible cells.
/// </summary>
public void Validate()
{
Object cell = graph.Model.Root;
if (cell != null && states.Count == 0)
{
mxRectangle graphBounds = GetBoundingBox(ValidateCellState(ValidateCell(cell)));
GraphBounds = (graphBounds != null) ? graphBounds : new mxRectangle();
}
}
/// <summary>
/// Returns the rectangle that should be used as the perimeter of the cell.
/// </summary>
/// <param name="border"></param>
/// <returns>Returns the rectangle that defines the perimeter.</returns>
public mxRectangle GetPerimeterBounds(double border)
{
mxRectangle bounds = new mxRectangle(this);
if (border != 0)
{
bounds.Grow(border);
}
return(bounds);
}
/// <summary>
/// Returns true if the given object equals this rectangle.
/// </summary>
/// <returns>Returns true if obj is equal.</returns>
new public Boolean Equals(Object obj)
{
if (obj is mxRectangle)
{
mxRectangle rect = (mxRectangle)obj;
return(rect.X == X &&
rect.Y == Y &&
rect.Width == Width &&
rect.Height == height);
}
return(false);
}
/// <summary>
/// First validates all bounds and then validates all points recursively on
/// all visible cells.
/// </summary>
public void Validate()
{
Object cell = graph.Model.Root;
if (cell != null && states.Count == 0)
{
ValidateBounds(null, cell);
GraphBounds = ValidatePoints(null, cell);
if (GraphBounds == null)
{
GraphBounds = new mxRectangle();
}
}
}
/// <summary>
/// Adds the given rectangle to this rectangle.
/// </summary>
public void Add(mxRectangle rect)
{
if (rect != null)
{
double minX = Math.Min(x, rect.x);
double minY = Math.Min(y, rect.y);
double maxX = Math.Max(x + width, rect.x + rect.width);
double maxY = Math.Max(y + height, rect.y + rect.height);
x = minX;
y = minY;
width = maxX - minX;
height = maxY - minY;
}
}
/* (non-Dotnetdoc)
* see com.mxgraph.mxGraphViewReader.CreateCanvas()
*/
override public mxICanvas CreateCanvas(Dictionary <string, Object> attrs)
{
int width = 0;
int height = 0;
int dx = 0;
int dy = 0;
mxRectangle tmp = Clip;
if (tmp != null)
{
dx -= (int)tmp.X;
dy -= (int)tmp.Y;
width = (int)tmp.Width;
height = (int)tmp.Height;
}
else
{
int x = (int)Math.Round(mxUtils.GetDouble(attrs, "x"));
int y = (int)Math.Round(mxUtils.GetDouble(attrs, "y"));
width = (int)(Math.Round(mxUtils.GetDouble(attrs, "width")))
+ border + 3;
height = (int)(Math.Round(mxUtils.GetDouble(attrs, "height")))
+ border + 3;
if (cropping)
{
dx = -x + 3;
dy = -y + 3;
}
else
{
width += x;
height += y;
}
}
mxImageCanvas canvas = new mxImageCanvas(new mxGdiCanvas(),
width, height, Background, AntiAlias);
canvas.Translate = new Point(dx, dy);
return(canvas);
}
/// <summary>
/// Updates the label bounds in the given state.
/// </summary>
/// <param name="state"></param>
public void UpdateLabelBounds(mxCellState state)
{
Object cell = state.Cell;
Dictionary <string, Object> style = state.Style;
if (mxUtils.GetString(style, mxConstants.STYLE_OVERFLOW, "").Equals("fill"))
{
state.LabelBounds = new mxRectangle(state);
}
else
{
string label = graph.GetLabel(cell);
mxRectangle vertexBounds = (!graph.Model.IsEdge(cell)) ?
state : null;
state.LabelBounds = mxUtils.GetLabelPaintBounds(label,
style, false, state.AbsoluteOffset, vertexBounds,
scale);
}
}
/// <summary>
/// Returns a rectangle that contains the offset in x and y and the horizontal
/// and vertical scale in width and height used to draw this shape inside the
/// given rectangle.
/// </summary>
/// <param name="state"></param>
/// <param name="bounds"></param>
/// <param name="direction"></param>
/// <returns></returns>
protected mxRectangle ComputeAspect(mxCellState state, mxRectangle bounds,
string direction)
{
double x0 = bounds.X;
double y0 = bounds.Y;
double sx = bounds.Width / w0;
double sy = bounds.Height / h0;
bool inverse = (direction != null && (direction.Equals("north") || direction
.Equals("south")));
if (inverse)
{
sy = bounds.Width / h0;
sx = bounds.Height / w0;
double delta = (bounds.Width - bounds.Height) / 2;
x0 += delta;
y0 -= delta;
}
if (aspect.Equals("fixed"))
{
sy = Math.Min(sx, sy);
sx = sy;
// Centers the shape inside the available space
if (inverse)
{
x0 += (bounds.Height - this.w0 * sx) / 2;
y0 += (bounds.Width - this.h0 * sy) / 2;
}
else
{
x0 += (bounds.Width - this.w0 * sx) / 2;
y0 += (bounds.Height - this.h0 * sy) / 2;
}
}
return(new mxRectangle(x0, y0, sx, sy));
}
/// <summary>
/// Returns the bounding box of the shape and the label for the given
/// cell state and its children if recurse is true.
/// </summary>
/// <param name="state">Cell state whose bounding box should be returned.</param>
/// <param name="recurse">Boolean indicating if the children should be included.</param>
public mxRectangle GetBoundingBox(mxCellState state, Boolean recurse)
{
mxRectangle bbox = null;
if (state != null)
{
if (state.BoundingBox != null)
{
bbox = (mxRectangle)state.BoundingBox.Clone();
}
if (recurse)
{
mxIGraphModel model = graph.Model;
int childCount = model.GetChildCount(state.Cell);
for (int i = 0; i < childCount; i++)
{
mxRectangle bounds = GetBoundingBox(
GetState(model.GetChildAt(state.Cell, i)), true);
if (bounds != null)
{
if (bbox == null)
{
bbox = bounds;
}
else
{
bbox.Add(bounds);
}
}
}
}
}
return(bbox);
}
/// <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>
/// Returns the bounding box for an array of cells or null, if no cells are
/// specified.
/// </summary>
public mxRectangle GetBounds(Object[] cells, bool boundingBox)
{
mxRectangle result = null;
if (cells != null && cells.Length > 0)
{
mxIGraphModel model = graph.Model;
for (int i = 0; i < cells.Length; i++)
{
if (model.IsVertex(cells[i]) || model.IsEdge(cells[i]))
{
mxCellState state = GetState(cells[i]);
if (state != null)
{
mxRectangle tmp = (boundingBox) ? state.BoundingBox : state;
if (tmp != null)
{
if (result == null)
{
result = new mxRectangle(tmp);
}
else
{
result.Add(tmp);
}
}
}
}
}
}
return(result);
}
/**
* Draws this stencil inside the given bounds.
*/
public bool DrawShape(mxGdiCanvas2D canvas, mxCellState state,
mxRectangle bounds, bool background)
{
XmlNode elt = (background) ? bgNode : fgNode;
if (elt != null)
{
String direction = mxUtils.GetString(state.Style,
mxConstants.STYLE_DIRECTION, null);
mxRectangle aspect = ComputeAspect(state, bounds, direction);
double minScale = Math.Min(aspect.Width, aspect.Height);
double sw = strokewidth.Equals("inherit") ? mxUtils.GetDouble(
state.Style, mxConstants.STYLE_STROKEWIDTH, 1)
* state.View.Scale : double
.Parse(strokewidth) * minScale;
lastMoveX = 0;
lastMoveY = 0;
canvas.StrokeWidth = sw;
XmlNode tmp = elt.FirstChild;
while (tmp != null)
{
if (tmp.NodeType == XmlNodeType.Element)
{
DrawElement(canvas, state, (XmlElement)tmp, aspect);
}
tmp = tmp.NextSibling;
}
return(true);
}
return(false);
}
/// <summary>
/// First validates all bounds and then validates all points recursively on
/// all visible cells.
/// </summary>
public void Validate()
{
Object cell = graph.Model.Root;
if (cell != null && states.Count == 0)
{
ValidateBounds(null, cell);
GraphBounds = ValidatePoints(null, cell);
if (GraphBounds == null)
{
GraphBounds = new mxRectangle();
}
}
}
/// <summary>
/// Constructs a copy of the given rectangle.
/// </summary>
/// <param name="rect">Rectangle to construct a copy of.</param>
public mxRectangle(mxRectangle rect)
: this(rect.X, rect.Y, rect.Width, rect.Height)
{
}
/// <summary>
/// Returns a rectangle that contains the offset in x and y and the horizontal
/// and vertical scale in width and height used to draw this shape inside the
/// given rectangle.
/// </summary>
/// <param name="state"></param>
/// <param name="bounds"></param>
/// <param name="direction"></param>
/// <returns></returns>
protected mxRectangle ComputeAspect(mxCellState state, mxRectangle bounds,
string direction)
{
double x0 = bounds.X;
double y0 = bounds.Y;
double sx = bounds.Width / w0;
double sy = bounds.Height / h0;
bool inverse = (direction != null && (direction.Equals("north") || direction
.Equals("south")));
if (inverse)
{
sy = bounds.Width / h0;
sx = bounds.Height / w0;
double delta = (bounds.Width - bounds.Height) / 2;
x0 += delta;
y0 -= delta;
}
if (aspect.Equals("fixed"))
{
sy = Math.Min(sx, sy);
sx = sy;
// Centers the shape inside the available space
if (inverse)
{
x0 += (bounds.Height - this.w0 * sx) / 2;
y0 += (bounds.Width - this.h0 * sy) / 2;
}
else
{
x0 += (bounds.Width - this.w0 * sx) / 2;
y0 += (bounds.Height - this.h0 * sy) / 2;
}
}
return new mxRectangle(x0, y0, sx, sy);
}
/// <summary>
/// Returns the bounds for the given cells.
/// </summary>
public mxRectangle GetBoundsForCells(Object[] cells, bool includeEdges,
bool includeDescendants, bool boundingBox)
{
mxRectangle result = null;
if (cells != null && cells.Length > 0)
{
for (int i = 0; i < cells.Length; i++)
{
mxRectangle tmp = GetCellBounds(cells[i], includeEdges,
includeDescendants, boundingBox);
if (tmp != null)
{
if (result == null)
{
result = new mxRectangle(tmp);
}
else
{
result.Add(tmp);
}
}
}
}
return result;
}
/// <summary>
/// Returns the bounds for a label for the given location and size, taking
/// into account the alignment and spacing in the specified style, as well
/// as the width and height of the rectangle that contains the label.
/// (For edge labels this width and height is 0.) The scale is used to scale
/// the given size and the spacings in the specified style.
/// </summary>
public static mxRectangle GetScaledLabelBounds(double x, double y, mxRectangle size,
double outerWidth, double outerHeight, Dictionary<string, Object> style, double scale)
{
// Adds an inset of 3 pixels
double inset = mxConstants.LABEL_INSET* scale;
// Scales the size of the label
double width = size.Width * scale + 2 * inset;
double height = size.Height * scale;
// Gets the global spacing and orientation
bool horizontal = IsTrue(style, mxConstants.STYLE_HORIZONTAL, true);
int spacing = (int)(GetInt(style, mxConstants.STYLE_SPACING) * scale);
// Gets the alignment settings
Object align = GetString(style, mxConstants.STYLE_ALIGN,
mxConstants.ALIGN_CENTER);
Object valign = GetString(style, mxConstants.STYLE_VERTICAL_ALIGN,
mxConstants.ALIGN_MIDDLE);
// Gets the vertical spacing
int top = (int)(GetInt(style, mxConstants.STYLE_SPACING_TOP) * scale);
int bottom = (int)(GetInt(style,
mxConstants.STYLE_SPACING_BOTTOM) * scale);
// Gets the horizontal spacing
int left = (int)(GetInt(style, mxConstants.STYLE_SPACING_LEFT) * scale);
int right = (int)(GetInt(style,
mxConstants.STYLE_SPACING_RIGHT) * scale);
// Applies the orientation to the spacings
if (!horizontal)
{
int tmp = top;
top = right;
right = bottom;
bottom = left;
left = tmp;
double tmp2 = width;
width = height;
height = tmp2;
}
// Computes the position of the label for the horizontal alignment
if ((horizontal && align.Equals(mxConstants.ALIGN_CENTER))
|| (!horizontal && valign.Equals(mxConstants.ALIGN_MIDDLE)))
{
x += (outerWidth - width) / 2 + left - right;
}
else if ((horizontal && align.Equals(mxConstants.ALIGN_RIGHT))
|| (!horizontal && valign.Equals(mxConstants.ALIGN_BOTTOM)))
{
x += outerWidth - width - spacing - right;
}
else
{
x += spacing + left;
}
// Computes the position of the label for the vertical alignment
if ((!horizontal && align.Equals(mxConstants.ALIGN_CENTER))
|| (horizontal && valign.Equals(mxConstants.ALIGN_MIDDLE)))
{
y += (outerHeight - height) / 2 + top - bottom;
}
else if ((!horizontal && align.Equals(mxConstants.ALIGN_LEFT))
|| (horizontal && valign.Equals(mxConstants.ALIGN_BOTTOM)))
{
y += outerHeight - height - spacing - bottom;
}
else
{
y += spacing + top;
}
return new mxRectangle(x, y, width, height);
}
/// <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>
/// 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;
canvas.Shadow(mxConstants.STENCIL_SHADOWCOLOR, filled);
}
canvas.Translate(-offset.X, -offset.Y);
}
/// <summary>
/// Constructs a copy of the given rectangle.
/// </summary>
/// <param name="rect">Rectangle to construct a copy of.</param>
public mxRectangle(mxRectangle rect)
: this(rect.X, rect.Y, rect.Width, rect.Height)
{
}
/// <summary>
/// Draws the given cells using a Graphics2D canvas and returns the buffered image
/// that represents the cells.
/// </summary>
public static mxICanvas DrawCells(mxGraph graph, Object[] cells, double scale,
mxRectangle clip, CanvasFactory factory)
{
mxICanvas canvas = null;
if (cells == null)
{
cells = new Object[] { graph.Model.Root };
}
if (cells != null)
{
// Gets the current state of the view
mxGraphView view = graph.View;
Dictionary<Object, mxCellState> states = view.States;
double oldScale = view.Scale;
// Keeps the existing translation as the cells might
// be aligned to the grid in a different way in a graph
// that has a translation other than zero
bool eventsEnabled = view.IsEventsEnabled;
// Disables firing of scale events so that there is no
// repaint or update of the original graph
view.IsEventsEnabled = false;
try
{
// TODO: Factor-out into mxTemporaryCellStates class
view.States = new Dictionary<Object, mxCellState>();
view.Scale = scale;
// Creates virtual parent state for validation
mxCellState state = view.CreateState(new mxCell());
// Validates the vertices and edges without adding them to
// the model so that the original cells are not modified
for (int i = 0; i < cells.Length; i++)
{
view.ValidateBounds(state, cells[i]);
}
for (int i = 0; i < cells.Length; i++)
{
view.ValidatePoints(state, cells[i]);
}
if (clip == null)
{
clip = graph.GetPaintBounds(cells);
}
if (clip != null && clip.Width > 0 && clip.Height > 0)
{
Rectangle rect = clip.GetRectangle();
canvas = factory.CreateCanvas(rect.Width + 1,
rect.Height + 1);
if (canvas != null)
{
double previousScale = canvas.Scale;
Point previousTranslate = canvas.Translate;
try
{
canvas.Translate = new Point(-rect.X, -rect.Y);
canvas.Scale = view.Scale;
for (int i = 0; i < cells.Length; i++)
{
graph.DrawCell(canvas, cells[i]);
}
}
finally
{
canvas.Scale = previousScale;
canvas.Translate = previousTranslate;
}
}
}
}
finally
{
view.Scale = oldScale;
view.States = states;
view.IsEventsEnabled = eventsEnabled;
}
}
return canvas;
}
/// <summary>
/// Draws the given cells using a Graphics2D canvas and returns the buffered image
/// that represents the cells.
/// </summary>
public static mxICanvas DrawCells(mxGraph graph, Object[] cells, double scale,
mxRectangle clip, CanvasFactory factory)
{
mxICanvas canvas = null;
if (cells == null)
{
cells = new Object[] { graph.Model.Root };
}
if (cells != null)
{
// Gets the current state of the view
mxGraphView view = graph.View;
Dictionary <Object, mxCellState> states = view.States;
double oldScale = view.Scale;
// Keeps the existing translation as the cells might
// be aligned to the grid in a different way in a graph
// that has a translation other than zero
bool eventsEnabled = view.IsEventsEnabled;
// Disables firing of scale events so that there is no
// repaint or update of the original graph
view.IsEventsEnabled = false;
try
{
// TODO: Factor-out into mxTemporaryCellStates class
view.States = new Dictionary <Object, mxCellState>();
view.Scale = scale;
// Creates virtual parent state for validation
mxCellState state = view.CreateState(new mxCell());
// Validates the vertices and edges without adding them to
// the model so that the original cells are not modified
for (int i = 0; i < cells.Length; i++)
{
view.ValidateBounds(state, cells[i]);
}
for (int i = 0; i < cells.Length; i++)
{
view.ValidatePoints(state, cells[i]);
}
if (clip == null)
{
clip = graph.GetPaintBounds(cells);
}
if (clip != null && clip.Width > 0 && clip.Height > 0)
{
Rectangle rect = clip.GetRectangle();
canvas = factory.CreateCanvas(rect.Width + 1,
rect.Height + 1);
if (canvas != null)
{
double previousScale = canvas.Scale;
Point previousTranslate = canvas.Translate;
try
{
canvas.Translate = new Point(-rect.X, -rect.Y);
canvas.Scale = view.Scale;
for (int i = 0; i < cells.Length; i++)
{
graph.DrawCell(canvas, cells[i]);
}
}
finally
{
canvas.Scale = previousScale;
canvas.Translate = previousTranslate;
}
}
}
}
finally
{
view.Scale = oldScale;
view.States = states;
view.IsEventsEnabled = eventsEnabled;
}
}
return(canvas);
}
/// <summary>
/// Creates an image for the given arguments.
/// </summary>
public static Image CreateImage(mxGraph graph, Object[] cells, double scale, Color? background,
bool antiAlias, mxRectangle clip)
{
return CreateImage(graph, cells, scale, background, antiAlias, clip, new mxGdiCanvas());
}
/// <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>
/// Creates an image for the given arguments.
/// </summary>
public static Image CreateImage(mxGraph graph, Object[] cells, double scale, Color?background,
bool antiAlias, mxRectangle clip)
{
return(CreateImage(graph, cells, scale, background, antiAlias, clip, new mxGdiCanvas()));
}
/// <summary>
/// Draws the given element.
/// </summary>
/// <param name="canvas"></param>
/// <param name="state"></param>
/// <param name="node"></param>
/// <param name="aspect"></param>
protected void DrawElement(mxGdiCanvas2D canvas, mxCellState state,
XmlElement node, mxRectangle aspect)
{
string name = node.Name;
double x0 = aspect.X;
double y0 = aspect.Y;
double sx = aspect.Width;
double sy = aspect.Height;
double minScale = Math.Min(sx, sy);
// LATER: Move to lookup table
if (name.Equals("save"))
{
canvas.Save();
}
else if (name.Equals("restore"))
{
canvas.Restore();
}
else if (name.Equals("path"))
{
canvas.Begin();
// Renders the elements inside the given path
XmlNode childNode = node.FirstChild;
while (childNode != null)
{
if (childNode.NodeType == XmlNodeType.Element)
{
DrawElement(canvas, state, (XmlElement)childNode, aspect);
}
childNode = childNode.NextSibling;
}
}
else if (name.Equals("close"))
{
canvas.Close();
}
else if (name.Equals("move"))
{
lastMoveX = x0 + GetDouble(node, "x") * sx;
lastMoveY = y0 + GetDouble(node, "y") * sy;
canvas.MoveTo(lastMoveX, lastMoveY);
}
else if (name.Equals("line"))
{
lastMoveX = x0 + GetDouble(node, "x") * sx;
lastMoveY = y0 + GetDouble(node, "y") * sy;
canvas.LineTo(lastMoveX, lastMoveY);
}
else if (name.Equals("quad"))
{
lastMoveX = x0 + GetDouble(node, "x2") * sx;
lastMoveY = y0 + GetDouble(node, "y2") * sy;
canvas.QuadTo(x0 + GetDouble(node, "x1") * sx,
y0 + GetDouble(node, "y1") * sy, lastMoveX, lastMoveY);
}
else if (name.Equals("curve"))
{
lastMoveX = x0 + GetDouble(node, "x3") * sx;
lastMoveY = y0 + GetDouble(node, "y3") * sy;
canvas.CurveTo(x0 + GetDouble(node, "x1") * sx,
y0 + GetDouble(node, "y1") * sy, x0 + GetDouble(node, "x2")
* sx, y0 + GetDouble(node, "y2") * sy, lastMoveX,
lastMoveY);
}
else if (name.Equals("arc"))
{
// Arc from stencil is turned into curves in image output
double r1 = GetDouble(node, "rx") * sx;
double r2 = GetDouble(node, "ry") * sy;
double angle = GetDouble(node, "x-axis-rotation");
double largeArcFlag = GetDouble(node, "large-arc-flag");
double sweepFlag = GetDouble(node, "sweep-flag");
double x = x0 + GetDouble(node, "x") * sx;
double y = y0 + GetDouble(node, "y") * sy;
double[] curves = mxUtils.ArcToCurves(this.lastMoveX,
this.lastMoveY, r1, r2, angle, largeArcFlag, sweepFlag, x,
y);
for (int i = 0; i < curves.Length; i += 6)
{
canvas.CurveTo(curves[i], curves[i + 1], curves[i + 2],
curves[i + 3], curves[i + 4], curves[i + 5]);
lastMoveX = curves[i + 4];
lastMoveY = curves[i + 5];
}
}
else if (name.Equals("rect"))
{
canvas.Rect(x0 + GetDouble(node, "x") * sx,
y0 + GetDouble(node, "y") * sy, GetDouble(node, "w") * sx,
GetDouble(node, "h") * sy);
}
else if (name.Equals("roundrect"))
{
double arcsize = GetDouble(node, "arcsize");
if (arcsize == 0)
{
arcsize = mxConstants.RECTANGLE_ROUNDING_FACTOR * 100;
}
double w = GetDouble(node, "w") * sx;
double h = GetDouble(node, "h") * sy;
double factor = arcsize / 100;
double r = Math.Min(w * factor, h * factor);
canvas.Roundrect(x0 + GetDouble(node, "x") * sx,
y0 + GetDouble(node, "y") * sy, GetDouble(node, "w") * sx,
GetDouble(node, "h") * sy, r, r);
}
else if (name.Equals("ellipse"))
{
canvas.Ellipse(x0 + GetDouble(node, "x") * sx,
y0 + GetDouble(node, "y") * sy, GetDouble(node, "w") * sx,
GetDouble(node, "h") * sy);
}
else if (name.Equals("image"))
{
string src = EvaluateAttribute(node, "src", state);
canvas.Image(x0 + GetDouble(node, "x") * sx,
y0 + GetDouble(node, "y") * sy, GetDouble(node, "w") * sx,
GetDouble(node, "h") * sy, src, false,
GetString(node, "flipH", "0").Equals("1"),
GetString(node, "flipV", "0").Equals("1"));
}
else if (name.Equals("text"))
{
String str = EvaluateAttribute(node, "str", state);
double rotation = GetString(node, "vertical", "0").Equals("1") ? -90 : 0;
canvas.Text(x0 + GetDouble(node, "x") * sx,
y0 + GetDouble(node, "y") * sy, 0, 0, str,
node.GetAttribute("align"), node.GetAttribute("valign"),
false, "", null, false, rotation, null);
}
else if (name.Equals("include-shape"))
{
mxStencil stencil = mxStencilRegistry.GetStencil(node
.GetAttribute("name"));
if (stencil != null)
{
double x = x0 + GetDouble(node, "x") * sx;
double y = y0 + GetDouble(node, "y") * sy;
double w = GetDouble(node, "w") * sx;
double h = GetDouble(node, "h") * sy;
mxRectangle tmp = new mxRectangle(x, y, w, h);
stencil.DrawShape(canvas, state, tmp, true);
stencil.DrawShape(canvas, state, tmp, false);
}
}
else if (name.Equals("fillstroke"))
{
canvas.FillAndStroke();
}
else if (name.Equals("fill"))
{
canvas.Fill();
}
else if (name.Equals("stroke"))
{
canvas.Stroke();
}
else if (name.Equals("strokewidth"))
{
canvas.StrokeWidth = GetDouble(node, "width") * minScale;
}
else if (name.Equals("dashed"))
{
canvas.Dashed = node.GetAttribute("dashed") == "1";
}
else if (name.Equals("dashpattern"))
{
string value = node.GetAttribute("pattern");
if (value != null)
{
string[] tmp = value.Split(' ');
StringBuilder pat = new StringBuilder();
for (int i = 0; i < tmp.Length; i++)
{
if (tmp[i].Length > 0)
{
pat.Append(double.Parse(tmp[i]) * minScale);
pat.Append(" ");
}
}
value = pat.ToString();
}
canvas.DashPattern = value;
}
else if (name.Equals("strokecolor"))
{
canvas.StrokeColor = node.GetAttribute("color");
}
else if (name.Equals("linecap"))
{
canvas.LineCap = node.GetAttribute("cap");
}
else if (name.Equals("linejoin"))
{
canvas.LineJoin = node.GetAttribute("join");
}
else if (name.Equals("miterlimit"))
{
canvas.MiterLimit = GetDouble(node, "limit");
}
else if (name.Equals("fillcolor"))
{
canvas.FillColor = node.GetAttribute("color");
}
else if (name.Equals("fontcolor"))
{
canvas.FontColor = node.GetAttribute("color");
}
else if (name.Equals("fontstyle"))
{
canvas.FontStyle = GetInt(node, "style", 0);
}
else if (name.Equals("fontfamily"))
{
canvas.FontFamily = node.GetAttribute("family");
}
else if (name.Equals("fontsize"))
{
canvas.FontSize = GetDouble(node, "size") * minScale;
}
}
/// <summary>
/// Updates the bounding box in the given cell state.
/// </summary>
/// <param name="state">Cell state whose bounding box should be
/// updated.</param>
/// <returns></returns>
public mxRectangle UpdateBoundingBox(mxCellState state)
{
// Gets the cell bounds and adds shadows and markers
mxRectangle rect = new mxRectangle(state.GetRectangle());
Dictionary<string, Object> style = state.Style;
// Adds extra pixels for the marker and stroke assuming
// that the border stroke is centered around the bounds
// and the first pixel is drawn inside the bounds
double strokeWidth = Math.Max(1, Math.Round(mxUtils.GetInt(style,
mxConstants.STYLE_STROKEWIDTH, 1)
* scale));
strokeWidth -= Math.Max(1, strokeWidth / 2);
if (graph.Model.IsEdge(state.Cell))
{
int ms = 0;
if (style.ContainsKey(mxConstants.STYLE_ENDARROW)
|| style.ContainsKey(mxConstants.STYLE_STARTARROW))
{
ms = (int) Math.Round(mxConstants.DEFAULT_MARKERSIZE * scale);
}
// Adds the strokewidth
rect.Grow(ms + strokeWidth);
// Adds worst case border for an arrow shape
if (mxUtils.GetString(style, mxConstants.STYLE_SHAPE, "").Equals(
mxConstants.SHAPE_ARROW))
{
rect.Grow(mxConstants.ARROW_WIDTH / 2);
}
}
else
{
rect.Grow(strokeWidth);
}
// Adds extra pixels for the shadow
if (mxUtils.IsTrue(style, mxConstants.STYLE_SHADOW))
{
rect.Width += mxConstants.SHADOW_OFFSETX;
rect.Height += mxConstants.SHADOW_OFFSETY;
}
// Adds oversize images in labels
if (mxUtils.GetString(style, mxConstants.STYLE_SHAPE, "").Equals(
mxConstants.SHAPE_LABEL))
{
if (mxUtils.GetString(style, mxConstants.STYLE_IMAGE) != null)
{
double w = mxUtils.GetInt(style,
mxConstants.STYLE_IMAGE_WIDTH,
mxConstants.DEFAULT_IMAGESIZE) * scale;
double h = mxUtils.GetInt(style,
mxConstants.STYLE_IMAGE_HEIGHT,
mxConstants.DEFAULT_IMAGESIZE) * scale;
double x = state.X;
double y = 0;
string imgAlign = mxUtils
.GetString(style, mxConstants.STYLE_IMAGE_ALIGN,
mxConstants.ALIGN_LEFT);
string imgValign = mxUtils.GetString(style,
mxConstants.STYLE_IMAGE_VERTICAL_ALIGN,
mxConstants.ALIGN_MIDDLE);
if (imgAlign.Equals(mxConstants.ALIGN_RIGHT))
{
x += state.Width - w;
}
else if (imgAlign.Equals(mxConstants.ALIGN_CENTER))
{
x += (state.Width - w) / 2;
}
if (imgValign.Equals(mxConstants.ALIGN_TOP))
{
y = state.Y;
}
else if (imgValign.Equals(mxConstants.ALIGN_BOTTOM))
{
y = state.Y + state.Height - h;
}
else
{
y = state.Y + (state.Height - h) / 2;
}
rect.Add(new mxRectangle(x, y, w, h));
}
}
// Adds the rotated bounds to the bounding box if the
// shape is rotated
double rotation = mxUtils.GetDouble(style, mxConstants.STYLE_ROTATION);
mxRectangle bbox = mxUtils.GetBoundingBox(rect, rotation);
// Add the rotated bounding box to the non-rotated so
// that all handles are also covered
if (bbox != null)
{
rect.Add(bbox);
}
// Unifies the cell bounds and the label bounds
if (!mxUtils.GetString(style, mxConstants.STYLE_OVERFLOW, "").Equals("hidden"))
{
rect.Add(state.LabelBounds);
}
state.BoundingBox = rect;
return rect;
}
/// <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 the bounding box for an array of cells or null, if no cells are
/// specified.
/// </summary>
public mxRectangle GetBounds(Object[] cells, bool boundingBox)
{
mxRectangle result = null;
if (cells != null && cells.Length > 0)
{
mxIGraphModel model = graph.Model;
for (int i = 0; i < cells.Length; i++)
{
if (model.IsVertex(cells[i]) || model.IsEdge(cells[i]))
{
mxCellState state = GetState(cells[i]);
if (state != null)
{
mxRectangle tmp = (boundingBox) ? state.BoundingBox : state;
if (tmp != null)
{
if (result == null)
{
result = new mxRectangle(tmp);
}
else
{
result.Add(tmp);
}
}
}
}
}
}
return result;
}
/// <summary>
/// Returns the bottom-most cell that intersects the given point (x, y) in
/// the cell hierarchy that starts at the given parent.
/// </summary>
/// <param name="state"></param>
/// <param name="rect"></param>
/// <returns>Returns true if the given cell state and rectangle intersect.</returns>
public bool Intersects(mxCellState state, Rectangle rect)
{
if (state != null)
{
// Checks if the label intersects
if (state.LabelBounds != null
&& state.LabelBounds.GetRectangle().IntersectsWith(rect))
{
return true;
}
int pointCount = state.AbsolutePointCount();
// Checks if the segments of the edge intersect
if (pointCount > 0)
{
mxRectangle tmp = new mxRectangle(rect);
tmp.Grow(tolerance);
rect = tmp.GetRectangle();
mxPoint p0 = state.AbsolutePoints[0];
for (int i = 0; i < pointCount; i++)
{
mxPoint p1 = state.AbsolutePoints[i];
// FIXME: Implement line intersection check
//if (rect.IntersectsLine(p0.X, p0.Y, p1.X, p1
// .Y))
// return true;
p0 = p1;
}
}
else
{
// Checks if the bounds of the shape intersect
return state.GetRectangle().IntersectsWith(rect);
}
}
return false;
}
/// <summary>
/// Updates the bounding box in the given cell state.
/// </summary>
/// <param name="state">Cell state whose bounding box should be
/// updated.</param>
/// <returns></returns>
public mxRectangle UpdateBoundingBox(mxCellState state)
{
// Gets the cell bounds and adds shadows and markers
mxRectangle rect = new mxRectangle(state.GetRectangle());
Dictionary <string, Object> style = state.Style;
// Adds extra pixels for the marker and stroke assuming
// that the border stroke is centered around the bounds
// and the first pixel is drawn inside the bounds
double strokeWidth = Math.Max(1, Math.Round(mxUtils.GetInt(style,
mxConstants.STYLE_STROKEWIDTH, 1)
* scale));
strokeWidth -= Math.Max(1, strokeWidth / 2);
if (graph.Model.IsEdge(state.Cell))
{
int ms = 0;
if (style.ContainsKey(mxConstants.STYLE_ENDARROW) ||
style.ContainsKey(mxConstants.STYLE_STARTARROW))
{
ms = (int)Math.Round(mxConstants.DEFAULT_MARKERSIZE * scale);
}
// Adds the strokewidth
rect.Grow(ms + strokeWidth);
// Adds worst case border for an arrow shape
if (mxUtils.GetString(style, mxConstants.STYLE_SHAPE, "").Equals(
mxConstants.SHAPE_ARROW))
{
rect.Grow(mxConstants.ARROW_WIDTH / 2);
}
}
else
{
rect.Grow(strokeWidth);
}
// Adds extra pixels for the shadow
if (mxUtils.IsTrue(style, mxConstants.STYLE_SHADOW))
{
rect.Width += mxConstants.SHADOW_OFFSETX;
rect.Height += mxConstants.SHADOW_OFFSETY;
}
// Adds oversize images in labels
if (mxUtils.GetString(style, mxConstants.STYLE_SHAPE, "").Equals(
mxConstants.SHAPE_LABEL))
{
if (mxUtils.GetString(style, mxConstants.STYLE_IMAGE) != null)
{
double w = mxUtils.GetInt(style,
mxConstants.STYLE_IMAGE_WIDTH,
mxConstants.DEFAULT_IMAGESIZE) * scale;
double h = mxUtils.GetInt(style,
mxConstants.STYLE_IMAGE_HEIGHT,
mxConstants.DEFAULT_IMAGESIZE) * scale;
double x = state.X;
double y = 0;
string imgAlign = mxUtils
.GetString(style, mxConstants.STYLE_IMAGE_ALIGN,
mxConstants.ALIGN_LEFT);
string imgValign = mxUtils.GetString(style,
mxConstants.STYLE_IMAGE_VERTICAL_ALIGN,
mxConstants.ALIGN_MIDDLE);
if (imgAlign.Equals(mxConstants.ALIGN_RIGHT))
{
x += state.Width - w;
}
else if (imgAlign.Equals(mxConstants.ALIGN_CENTER))
{
x += (state.Width - w) / 2;
}
if (imgValign.Equals(mxConstants.ALIGN_TOP))
{
y = state.Y;
}
else if (imgValign.Equals(mxConstants.ALIGN_BOTTOM))
{
y = state.Y + state.Height - h;
}
else
{
y = state.Y + (state.Height - h) / 2;
}
rect.Add(new mxRectangle(x, y, w, h));
}
}
// Adds the rotated bounds to the bounding box if the
// shape is rotated
double rotation = mxUtils.GetDouble(style, mxConstants.STYLE_ROTATION);
mxRectangle bbox = mxUtils.GetBoundingBox(rect, rotation);
// Add the rotated bounding box to the non-rotated so
// that all handles are also covered
if (bbox != null)
{
rect.Add(bbox);
}
// Unifies the cell bounds and the label bounds
if (!mxUtils.GetString(style, mxConstants.STYLE_OVERFLOW, "").Equals("hidden"))
{
rect.Add(state.LabelBounds);
}
state.BoundingBox = rect;
return(rect);
}
/**
* Draws this stencil inside the given bounds.
*/
public bool DrawShape(mxGdiCanvas2D canvas, mxCellState state,
mxRectangle bounds, bool background)
{
XmlNode elt = (background) ? bgNode : fgNode;
if (elt != null)
{
String direction = mxUtils.GetString(state.Style,
mxConstants.STYLE_DIRECTION, null);
mxRectangle aspect = ComputeAspect(state, bounds, direction);
double minScale = Math.Min(aspect.Width, aspect.Height);
double sw = strokewidth.Equals("inherit") ? mxUtils.GetDouble(
state.Style, mxConstants.STYLE_STROKEWIDTH, 1)
* state.View.Scale : double
.Parse(strokewidth) * minScale;
lastMoveX = 0;
lastMoveY = 0;
canvas.StrokeWidth = sw;
XmlNode tmp = elt.FirstChild;
while (tmp != null)
{
if (tmp.NodeType == XmlNodeType.Element)
{
DrawElement(canvas, state, (XmlElement) tmp, aspect);
}
tmp = tmp.NextSibling;
}
return true;
}
return false;
}
/// <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>
/// Draws the given element.
/// </summary>
/// <param name="canvas"></param>
/// <param name="state"></param>
/// <param name="node"></param>
/// <param name="aspect"></param>
protected void DrawElement(mxGdiCanvas2D canvas, mxCellState state,
XmlElement node, mxRectangle aspect)
{
string name = node.Name;
double x0 = aspect.X;
double y0 = aspect.Y;
double sx = aspect.Width;
double sy = aspect.Height;
double minScale = Math.Min(sx, sy);
// LATER: Move to lookup table
if (name.Equals("save"))
{
canvas.Save();
}
else if (name.Equals("restore"))
{
canvas.Restore();
}
else if (name.Equals("path"))
{
canvas.Begin();
// Renders the elements inside the given path
XmlNode childNode = node.FirstChild;
while (childNode != null)
{
if (childNode.NodeType == XmlNodeType.Element)
{
DrawElement(canvas, state, (XmlElement) childNode, aspect);
}
childNode = childNode.NextSibling;
}
}
else if (name.Equals("close"))
{
canvas.Close();
}
else if (name.Equals("move"))
{
lastMoveX = x0 + GetDouble(node, "x") * sx;
lastMoveY = y0 + GetDouble(node, "y") * sy;
canvas.MoveTo(lastMoveX, lastMoveY);
}
else if (name.Equals("line"))
{
lastMoveX = x0 + GetDouble(node, "x") * sx;
lastMoveY = y0 + GetDouble(node, "y") * sy;
canvas.LineTo(lastMoveX, lastMoveY);
}
else if (name.Equals("quad"))
{
lastMoveX = x0 + GetDouble(node, "x2") * sx;
lastMoveY = y0 + GetDouble(node, "y2") * sy;
canvas.QuadTo(x0 + GetDouble(node, "x1") * sx,
y0 + GetDouble(node, "y1") * sy, lastMoveX, lastMoveY);
}
else if (name.Equals("curve"))
{
lastMoveX = x0 + GetDouble(node, "x3") * sx;
lastMoveY = y0 + GetDouble(node, "y3") * sy;
canvas.CurveTo(x0 + GetDouble(node, "x1") * sx,
y0 + GetDouble(node, "y1") * sy, x0 + GetDouble(node, "x2")
* sx, y0 + GetDouble(node, "y2") * sy, lastMoveX,
lastMoveY);
}
else if (name.Equals("arc"))
{
// Arc from stencil is turned into curves in image output
double r1 = GetDouble(node, "rx") * sx;
double r2 = GetDouble(node, "ry") * sy;
double angle = GetDouble(node, "x-axis-rotation");
double largeArcFlag = GetDouble(node, "large-arc-flag");
double sweepFlag = GetDouble(node, "sweep-flag");
double x = x0 + GetDouble(node, "x") * sx;
double y = y0 + GetDouble(node, "y") * sy;
double[] curves = mxUtils.ArcToCurves(this.lastMoveX,
this.lastMoveY, r1, r2, angle, largeArcFlag, sweepFlag, x,
y);
for (int i = 0; i < curves.Length; i += 6)
{
canvas.CurveTo(curves[i], curves[i + 1], curves[i + 2],
curves[i + 3], curves[i + 4], curves[i + 5]);
lastMoveX = curves[i + 4];
lastMoveY = curves[i + 5];
}
}
else if (name.Equals("rect"))
{
canvas.Rect(x0 + GetDouble(node, "x") * sx,
y0 + GetDouble(node, "y") * sy, GetDouble(node, "w") * sx,
GetDouble(node, "h") * sy);
}
else if (name.Equals("roundrect"))
{
double arcsize = GetDouble(node, "arcsize");
if (arcsize == 0)
{
arcsize = mxConstants.RECTANGLE_ROUNDING_FACTOR * 100;
}
double w = GetDouble(node, "w") * sx;
double h = GetDouble(node, "h") * sy;
double factor = arcsize / 100;
double r = Math.Min(w * factor, h * factor);
canvas.Roundrect(x0 + GetDouble(node, "x") * sx,
y0 + GetDouble(node, "y") * sy, GetDouble(node, "w") * sx,
GetDouble(node, "h") * sy, r, r);
}
else if (name.Equals("ellipse"))
{
canvas.Ellipse(x0 + GetDouble(node, "x") * sx,
y0 + GetDouble(node, "y") * sy, GetDouble(node, "w") * sx,
GetDouble(node, "h") * sy);
}
else if (name.Equals("image"))
{
string src = EvaluateAttribute(node, "src", state);
canvas.Image(x0 + GetDouble(node, "x") * sx,
y0 + GetDouble(node, "y") * sy, GetDouble(node, "w") * sx,
GetDouble(node, "h") * sy, src, false,
GetString(node, "flipH", "0").Equals("1"),
GetString(node, "flipV", "0").Equals("1"));
}
else if (name.Equals("text"))
{
String str = EvaluateAttribute(node, "str", state);
canvas.Text(x0 + GetDouble(node, "x") * sx,
y0 + GetDouble(node, "y") * sy, 0, 0, str,
node.GetAttribute("align"), node.GetAttribute("valign"),
GetString(node, "vertical", "0").Equals("1"), false, "");
}
else if (name.Equals("include-shape"))
{
mxStencil stencil = mxStencilRegistry.GetStencil(node
.GetAttribute("name"));
if (stencil != null)
{
double x = x0 + GetDouble(node, "x") * sx;
double y = y0 + GetDouble(node, "y") * sy;
double w = GetDouble(node, "w") * sx;
double h = GetDouble(node, "h") * sy;
mxRectangle tmp = new mxRectangle(x, y, w, h);
stencil.DrawShape(canvas, state, tmp, true);
stencil.DrawShape(canvas, state, tmp, false);
}
}
else if (name.Equals("fillstroke"))
{
canvas.FillAndStroke();
}
else if (name.Equals("fill"))
{
canvas.Fill();
}
else if (name.Equals("stroke"))
{
canvas.Stroke();
}
else if (name.Equals("strokewidth"))
{
canvas.StrokeWidth = GetDouble(node, "width") * minScale;
}
else if (name.Equals("dashed"))
{
canvas.Dashed = node.GetAttribute("dashed") == "1";
}
else if (name.Equals("dashpattern"))
{
string value = node.GetAttribute("pattern");
if (value != null)
{
string[] tmp = value.Split(' ');
StringBuilder pat = new StringBuilder();
for (int i = 0; i < tmp.Length; i++)
{
if (tmp[i].Length > 0)
{
pat.Append(double.Parse(tmp[i]) * minScale);
pat.Append(" ");
}
}
value = pat.ToString();
}
canvas.DashPattern = value;
}
else if (name.Equals("strokecolor"))
{
canvas.StrokeColor = node.GetAttribute("color");
}
else if (name.Equals("linecap"))
{
canvas.LineCap = node.GetAttribute("cap");
}
else if (name.Equals("linejoin"))
{
canvas.LineJoin = node.GetAttribute("join");
}
else if (name.Equals("miterlimit"))
{
canvas.MiterLimit = GetDouble(node, "limit");
}
else if (name.Equals("fillcolor"))
{
canvas.FillColor = node.GetAttribute("color");
}
else if (name.Equals("fontcolor"))
{
canvas.FontColor = node.GetAttribute("color");
}
else if (name.Equals("fontstyle"))
{
canvas.FontStyle = GetInt(node, "style", 0);
}
else if (name.Equals("fontfamily"))
{
canvas.FontFamily = node.GetAttribute("family");
}
else if (name.Equals("fontsize"))
{
canvas.FontSize = GetDouble(node, "size") * minScale;
}
}
/// <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>
/// Returns the rectangle that should be used as the perimeter of the cell.
/// </summary>
/// <param name="border"></param>
/// <returns>Returns the rectangle that defines the perimeter.</returns>
public mxRectangle GetPerimeterBounds(double border)
{
mxRectangle bounds = new mxRectangle(this);
if (border != 0)
{
bounds.Grow(border);
}
return bounds;
}
/// <summary>
/// Adds the given rectangle to this rectangle.
/// </summary>
public void Add(mxRectangle rect)
{
if (rect != null)
{
double minX = Math.Min(x, rect.x);
double minY = Math.Min(y, rect.y);
double maxX = Math.Max(x + width, rect.x + rect.width);
double maxY = Math.Max(y + height, rect.y + rect.height);
x = minX;
y = minY;
width = maxX - minX;
height = maxY - minY;
}
}
