public GOM_Link(System.Xml.XmlNode node, GOM_ResourceArrays resources)
{
m_startStyle = GOMLib.GOM_Terminal_Style.None;
m_endStyle = GOMLib.GOM_Terminal_Style.Triangle;
m_drawingStyle = new GOMLib.GOM_Style_Drawing();
m_linkingStyle = GOM_Linking_Style.Line;
m_keyPts = new GOM_Points();
m_drawingStyle.id = "default";
LoadFromXML(node, resources);
}
public GOM_Link(GOM_Interface_Graphic_Object startObj, GOM_Point startPt, GOM_Interface_Graphic_Object endObj, GOM_Point endPt, GOM_Style_Drawing drawingStyle, GOM_Linking_Style linkingStyle, GOM_Terminal_Style startStyle, GOM_Terminal_Style endStyle)
{
m_startObj = startObj;
m_endObj = endObj;
m_startPt = startPt;
m_endPt = endPt;
m_startStyle = startStyle;
m_endStyle = endStyle;
m_drawingStyle = drawingStyle;
m_linkingStyle = linkingStyle;
m_keyPts = new GOM_Points();
m_drawingStyle.id = "default";
}
/// <summary>
/// Draws link's terminal ponit.
/// </summary>
/// <param name="canvas"></param>
/// <param name="style"></param>
/// <param name="pt1"></param>
/// <param name="pt2"></param>
private void DrawTerminal(System.Drawing.Graphics canvas, GOM_Terminal_Style style, System.Drawing.PointF pt1, System.Drawing.PointF pt2)
{
System.Drawing.Drawing2D.Matrix matrix;
float angle;
angle = (float)(System.Math.Atan2(pt2.Y - pt1.Y, pt2.X - pt1.X) / System.Math.PI) * 180;
matrix = canvas.Transform;
canvas.TranslateTransform(pt1.X, pt1.Y);
canvas.RotateTransform(angle);
switch (style)
{
case GOM_Terminal_Style.Circle:
{
canvas.FillEllipse(new System.Drawing.SolidBrush(m_drawingStyle.drawingStyle.Color), -5, -5, 10, 10);
break;
}
case GOM_Terminal_Style.Arrow:
{
canvas.DrawLine(m_drawingStyle.drawingStyle, 0, 0, 10, 5);
canvas.DrawLine(m_drawingStyle.drawingStyle, 0, 0, 10, -5);
break;
}
case GOM_Terminal_Style.Triangle:
{
System.Drawing.Point[] rgPts;
rgPts = new System.Drawing.Point[3];
rgPts[0].X = 0;
rgPts[0].Y = 0;
rgPts[1].X = 10;
rgPts[1].Y = 5;
rgPts[2].X = 10;
rgPts[2].Y = -5;
canvas.FillPolygon(new System.Drawing.SolidBrush(m_drawingStyle.drawingStyle.Color), rgPts);
break;
}
case GOM_Terminal_Style.Diamond:
{
System.Drawing.Point[] rgPts;
rgPts = new System.Drawing.Point[4];
rgPts[0].X = 0;
rgPts[0].Y = 0;
rgPts[1].X = 5;
rgPts[1].Y = 5;
rgPts[2].X = 10;
rgPts[2].Y = 0;
rgPts[3].X = 5;
rgPts[3].Y = -5;
canvas.FillPolygon(new System.Drawing.SolidBrush(m_drawingStyle.drawingStyle.Color), rgPts);
break;
}
}
canvas.Transform = matrix;
}
/// <summary>
/// Load the link from XmlNode.
/// </summary>
/// <param name="node">The XmlNode.</param>
/// <param name="resources">GOM resource.</param>
public void LoadFromXML(System.Xml.XmlNode node, GOM_ResourceArrays resources)
{
GOM_Utility.VerifyXmlNode(node, GOM_TAGS.CONNECTION);
for( int i=0; i<node.Attributes.Count; i++ )
{
// if ( string.Compare(node.Attributes[i].Name,GOM_TAGS.DRAWING_STYLE) == 0 )
// {
// this.m_drawingStyle = resources.DrawingStyles[node.Attributes[i].Value];
// }
if ( string.Compare(node.Attributes[i].Name,GOM_TAGS.LINKING_STYLE) == 0 )
{
this.m_linkingStyle = ConvertStringToLinkingStyle(node.Attributes[i].Value);
}
}
GOM_Utility.VerifyXmlNode(node.ChildNodes[0], GOM_TAGS.POINT);
GOM_Utility.VerifyXmlNode(node.ChildNodes[1], GOM_TAGS.POINT);
// 1st pass
// objectID
for( int i=0; i<node.ChildNodes[0].Attributes.Count; i++ )
{
if ( string.Compare(node.ChildNodes[0].Attributes[i].Name, GOM_TAGS.OBJECTID) == 0 )
{
this.m_startObj = GOM_Utility.RecursiveFindObject(node.ChildNodes[0].Attributes[i].Value, resources.Objects);
}
}
for( int i=0; i<node.ChildNodes[1].Attributes.Count; i++ )
{
if ( string.Compare(node.ChildNodes[1].Attributes[i].Name, GOM_TAGS.OBJECTID) == 0 )
{
this.m_endObj = GOM_Utility.RecursiveFindObject(node.ChildNodes[1].Attributes[i].Value, resources.Objects);
}
}
if ( m_startObj==null || m_endObj==null )
{
throw new System.Xml.XmlException("Missing points in the connection.");
}
// if ( !(m_startObj is GOM_Object_Primitive) || !(m_endObj is GOM_Object_Primitive) )
// {
// throw new System.Xml.XmlException("Terminal points' objects are not all primitives.");
// }
// 2nd pass
// pointID
// terminalStyle
for( int i=0; i<node.ChildNodes[0].Attributes.Count; i++ )
{
if ( string.Compare(node.ChildNodes[0].Attributes[i].Name, GOM_TAGS.POINTID) == 0 )
{
this.m_startPt = m_startObj.GetPointByName(node.ChildNodes[0].Attributes[i].Value);
}
if ( string.Compare(node.ChildNodes[0].Attributes[i].Name, GOM_TAGS.TERMINAL_STYLE) == 0 )
{
this.m_startStyle = ConvertStringToTerminalStyle(node.ChildNodes[0].Attributes[i].Value);
}
}
for( int i=0; i<node.ChildNodes[1].Attributes.Count; i++ )
{
if ( string.Compare(node.ChildNodes[1].Attributes[i].Name, GOM_TAGS.POINTID) == 0 )
{
this.m_endPt = m_endObj.GetPointByName(node.ChildNodes[1].Attributes[i].Value);
}
if ( string.Compare(node.ChildNodes[1].Attributes[i].Name, GOM_TAGS.TERMINAL_STYLE) == 0 )
{
this.m_endStyle = ConvertStringToTerminalStyle(node.ChildNodes[1].Attributes[i].Value);
}
}
if ( m_startPt==null || m_endPt==null )
{
throw new System.Xml.XmlException("Cannot find find terminal points.");
}
// Drawing style
this.m_drawingStyle.LoadFromXML( node.ChildNodes[2], resources );
// Key points
GOM_Utility.VerifyXmlNode(node.ChildNodes[3], GOM_TAGS.KEYPOINTS);
for(int i=0; i<node.ChildNodes[3].ChildNodes.Count; i++ )
{
if ( string.Compare(node.ChildNodes[3].ChildNodes[i].Name, GOM_TAGS.POINT, true) == 0 )
{
GOM_Point keyPoint = new GOM_Point();
for(int j=0; j<node.ChildNodes[3].ChildNodes[i].Attributes.Count; j++ )
{
if ( string.Compare(node.ChildNodes[3].ChildNodes[i].Attributes[j].Name, GOM_TAGS.X, true) == 0 )
{
keyPoint.x = float.Parse(node.ChildNodes[3].ChildNodes[i].Attributes[j].Value);
}
if ( string.Compare(node.ChildNodes[3].ChildNodes[i].Attributes[j].Name, GOM_TAGS.Y, true) == 0 )
{
keyPoint.y = float.Parse(node.ChildNodes[3].ChildNodes[i].Attributes[j].Value);
}
}
m_keyPts.Add(keyPoint);
}
}
}
/// <summary>
/// Convert the TerminalStyle to a string.
/// </summary>
/// <param name="terminalStyle">The TermianlStyel.</param>
/// <returns>A string.</returns>
public string ConvertTerminalStyleToString( GOM_Terminal_Style terminalStyle )
{
switch(terminalStyle)
{
case GOM_Terminal_Style.None:
return "none";
case GOM_Terminal_Style.Circle:
return "circle";
case GOM_Terminal_Style.Arrow:
return "arrow";
case GOM_Terminal_Style.Triangle:
return "triangle";
case GOM_Terminal_Style.Diamond:
return "diamond";
}
throw new ArgumentException("Unknown TerminalStyle["+terminalStyle.ToString()+"].");
}
