/// <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>
/// Adds the given stencil.
/// </summary>
/// <param name="name"></param>
/// <param name="stencil"></param>
public static void AddStencil(string name, mxStencil stencil)
{
stencils[name] = stencil;
}