public static MessageDrawing CreateFromXml(string xml)
{
string me = "MessageDrawing.CreateFromXml()";
//Debug.WriteLine( "MessageDrawing.CreateFromXml()" );
Debug.WriteLine(me + " : " + xml);
MessageDrawing msg = null;
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.LoadXml(xml);
XmlNode root = xmlDoc.DocumentElement;
bool filled = false;
Color fillColor = Color.Black, penColor = Color.Black;
XmlNodeList nodes;
XmlNode node;
node = root.SelectSingleNode("fill");
if (node != null)
{
try
{
filled = true;
int rgb = Convert.ToInt32(node.Attributes["color"].Value);
fillColor = Color.FromArgb(rgb);
}
catch (Exception ex)
{
throw new Exception("Malformed MessageDrawing : fill element has error.");
}
}
node = root.SelectSingleNode("pen");
if (node != null)
{
try
{
int rgb = Convert.ToInt32(node.Attributes["color"].Value);
penColor = Color.FromArgb(rgb);
}
catch (Exception ex)
{
throw new Exception("Malformed MessageDrawing : fill element has error.");
}
}
XmlNode data_node;
string type = null;
try
{
//node = root.SelectSingleNode("descendant::book[author/last-name='Austen']");
data_node = root.SelectSingleNode("data");
type = data_node.Attributes["type"].Value;
}
catch (Exception ex)
{
throw new Exception("Malformed MessageDrawing : missing data element or type attribute.");
}
switch (type)
{
case "line":
Debug.WriteLine(me + " : create a MessageDrawingLine");
try
{
nodes = data_node.SelectNodes("point");
Point p1, p2;
p1 = new Point(Convert.ToInt32(nodes[0].Attributes["x"].Value), Convert.ToInt32(nodes[0].Attributes["y"].Value));
p2 = new Point(Convert.ToInt32(nodes[1].Attributes["x"].Value), Convert.ToInt32(nodes[1].Attributes["y"].Value));
msg = new MessageDrawingLine(penColor, p1, p2);
}
catch (Exception ex)
{
throw new Exception("Malformed MessageDrawingLine : " + ex.Message + EOL + ex.StackTrace);
}
break;
case "rectangle":
try
{
node = data_node.SelectSingleNode("point");
Point point = new Point(Convert.ToInt32(node.Attributes["x"].Value), Convert.ToInt32(node.Attributes["y"].Value));
node = data_node.SelectSingleNode("size");
Size size = new Size(Convert.ToInt32(node.Attributes["w"].Value), Convert.ToInt32(node.Attributes["h"].Value));
if (filled)
{
msg = new MessageDrawingRectangle(filled, fillColor, point, size);
}
else
{
msg = new MessageDrawingRectangle(filled, penColor, point, size);
}
}
catch (Exception ex)
{
throw new Exception("Malformed MessageDrawingRectangle : " + ex.Message + EOL + ex.StackTrace);
}
break;
case "ellipse":
try
{
node = data_node.SelectSingleNode("point");
Point point = new Point(Convert.ToInt32(node.Attributes["x"].Value), Convert.ToInt32(node.Attributes["y"].Value));
node = data_node.SelectSingleNode("size");
Size size = new Size(Convert.ToInt32(node.Attributes["w"].Value), Convert.ToInt32(node.Attributes["h"].Value));
if (filled)
{
msg = new MessageDrawingEllipse(filled, fillColor, point, size);
}
else
{
msg = new MessageDrawingEllipse(filled, penColor, point, size);
}
}
catch (Exception ex)
{
throw new Exception("Malformed MessageDrawingEllipse : " + ex.Message + EOL + ex.StackTrace);
}
break;
case "triangle":
try
{
nodes = data_node.SelectNodes("point");
Point p1, p2, p3;
p1 = new Point(Convert.ToInt32(nodes[0].Attributes["x"].Value), Convert.ToInt32(nodes[0].Attributes["y"].Value));
p2 = new Point(Convert.ToInt32(nodes[1].Attributes["x"].Value), Convert.ToInt32(nodes[1].Attributes["y"].Value));
p3 = new Point(Convert.ToInt32(nodes[2].Attributes["x"].Value), Convert.ToInt32(nodes[2].Attributes["y"].Value));
if (filled)
{
msg = new MessageDrawingTriangle(filled, fillColor, p1, p2, p3);
}
else
{
msg = new MessageDrawingTriangle(filled, penColor, p1, p2, p3);
}
}
catch (Exception ex)
{
throw new Exception("Malformed MessageDrawingTriangle : " + ex.Message + EOL + ex.StackTrace);
}
break;
}
if (msg == null)
{
throw new Exception("Malformed MessageDrawing : Unknow drawing type");
}
return(msg);
}
private void pictureBox1_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
if (numclicks == 0)
{
// Set numclicks and first point to line
if (toolLine.Checked)
{
pts = new Point[2];
numclicks = 1;
pts[numclicks] = new Point(e.X, e.Y);
}
// Set numclicks and first point to rectangle
if (toolRectangle.Checked)
{
pts = new Point[2];
numclicks = 1;
pts[numclicks] = new Point(e.X, e.Y);
}
// Set numclicks and first point to triangle
if (toolTriangle.Checked)
{
pts = new Point[3];
numclicks = 2;
pts[numclicks] = new Point(e.X, e.Y);
}
// Set numclicks and first point to ellipse
if (toolEllipse.Checked)
{
pts = new Point[2];
numclicks = 1;
pts[numclicks] = new Point(e.X, e.Y);
}
}
else
{
MessageDrawing messageDrawing = null;
numclicks--;
pts[numclicks] = new Point(e.X, e.Y);
if (numclicks == 0)
{
// draw line
if (toolLine.Checked)
{
graphics.DrawLine(new Pen(color), pts[1], pts[0]);
messageDrawing = new MessageDrawingLine(color, pts[1], pts[0]);
}
// draw rectangle
else if (toolRectangle.Checked)
{
int x = pts[1].X;
int y = pts[1].Y;
int w = mpx - x;
int h = mpy - y;
if (w < 0)
{
x = mpx;
w = -w;
}
if (h < 0)
{
y = mpy;
h = -h;
}
if (toolFill.Checked)
{
graphics.FillRectangle(new SolidBrush(color), x, y, w, h);
}
else
{
graphics.DrawRectangle(new Pen(color), x, y, w, h);
}
messageDrawing = new MessageDrawingRectangle(toolFill.Checked, color, new Point(x, y), new Size(w, h));
}
else if (toolTriangle.Checked)
// draw triangle
{
if (toolFill.Checked)
{
graphics.FillPolygon(new SolidBrush(color), new Point[] { pts[2], pts[1], pts[0] });
}
else
{
graphics.DrawPolygon(new Pen(color), new Point[] { pts[2], pts[1], pts[0] });
}
messageDrawing = new MessageDrawingTriangle(toolFill.Checked, color, pts[2], pts[1], pts[0]);
}
else if (toolEllipse.Checked)
// draw ellipse
{
int x = pts[1].X;
int y = pts[1].Y;
int w = mpx - x;
int h = mpy - y;
if (w < 0)
{
x = mpx;
w = -w;
}
if (h < 0)
{
y = mpy;
h = -h;
}
if (toolFill.Checked)
{
graphics.FillEllipse(new SolidBrush(color), x, y, w, h);
}
else
{
graphics.DrawEllipse(new Pen(color), x, y, w, h);
}
messageDrawing = new MessageDrawingEllipse(toolFill.Checked, color, new Point(x, y), new Size(w, h));
}
}
if (messageDrawing != null)
{
messageDrawing.Send(this, this.xmlBlaster);
}
}
}
}
