making references to move?

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1. Can I save the lines that I'll draw? Coz I was thinking of making a reference to the lines I created.

2. I have a picturebox that was connected to another picturebox using a line. (Just like a flowchart, but the lines are in "Z" shape). Is it possible that when I moved my picturebox in runtime, lines will follow? My pictureboxes are movable. If yes, please tell me how.

Here my code in Paint Event:

C#

void PaintThis(object sender, PaintEventArgs e)
 {

     newStruct ST = new newStruct();

     xd.Load(filename);
     XmlNodeList xnl = xd.SelectSingleNode("root").ChildNodes;



     foreach (XmlNode xn in xnl)
     {


         XmlElement xe = (XmlElement)xn;
         XmlNodeList name = xe.GetElementsByTagName("picname");
         XmlNodeList x1 = xe.GetElementsByTagName("x1");
         XmlNodeList y1 = xe.GetElementsByTagName("y1");
         XmlNodeList xc = xe.GetElementsByTagName("xcenter");
         XmlNodeList yc = xe.GetElementsByTagName("ycenter");
         XmlNodeList x2 = xe.GetElementsByTagName("x2");
         XmlNodeList y2 = xe.GetElementsByTagName("y2");

         ST.graps = e.Graphics;
         Pen myPen = new Pen(System.Drawing.Color.Blue, 3);


         for (int j = 0; j < name.Count; j++)
         {

             ST.x1St = Convert.ToInt32(x1[j].InnerText);
             ST.y1St = Convert.ToInt32(y1[j].InnerText);
             ST.xcSt = Convert.ToInt32(xcenter[j].InnerText);
             ST.ycSt = Convert.ToInt32(ycenter[j].InnerText);
             ST.x2St = Convert.ToInt32(x2[j].InnerText);
             ST.y2St = Convert.ToInt32(y2[j].InnerText);
             ST.halfHeight = 50;
             ST.halfWidth = 50;


             //DRAW LINES IN PANEL THROUGH POINTS
             ST.graps.DrawLine(myPen, ST.x1St + ST.halfWidth, ST.y1St + ST.halfHeight, ST.xcSt, ST.ycSt + ST.halfHeight);
             ST.graps.DrawLine(myPen, ST.xcSt, ST.ycSt + ST.halfHeight, ST.xcSt, ST.x2St);
             ST.graps.DrawLine(myPen, ST.xcSt, ST.x2St, ST.x2St, ST.y2St);

         }
     }
 }

Thanks.:confused:

Posted 31-Jan-11 23:02pm

yummy02

Updated 1-Feb-11 0:13am

Prerak Patel

v2

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Comments

shakil0304003 1-Feb-11 5:08am

Please, share your code!!!

yummy02 1-Feb-11 5:19am

Here my code in Paint Event:

void PaintThis(object sender, PaintEventArgs e)
{

newStruct ST = new newStruct();

xd.Load(filename);
XmlNodeList xnl = xd.SelectSingleNode("root").ChildNodes;

foreach (XmlNode xn in xnl)
{

XmlElement xe = (XmlElement)xn;
XmlNodeList name = xe.GetElementsByTagName("picname");
XmlNodeList x1 = xe.GetElementsByTagName("x1");
XmlNodeList y1 = xe.GetElementsByTagName("y1");
XmlNodeList xc = xe.GetElementsByTagName("xcenter");
XmlNodeList yc = xe.GetElementsByTagName("ycenter");
XmlNodeList x2 = xe.GetElementsByTagName("x2");
XmlNodeList y2 = xe.GetElementsByTagName("y2");

ST.graps = e.Graphics;
Pen myPen = new Pen(System.Drawing.Color.Blue, 3);

for (int j = 0; j < name.Count; j++)
{

ST.x1St = Convert.ToInt32(x1[j].InnerText);
ST.y1St = Convert.ToInt32(y1[j].InnerText);
ST.xcSt = Convert.ToInt32(xcenter[j].InnerText);
ST.ycSt = Convert.ToInt32(ycenter[j].InnerText);
ST.x2St = Convert.ToInt32(x2[j].InnerText);
ST.y2St = Convert.ToInt32(y2[j].InnerText);
ST.halfHeight = 50;
ST.halfWidth = 50;

//DRAW LINES IN PANEL THROUGH POINTS
ST.graps.DrawLine(myPen, ST.x1St + ST.halfWidth, ST.y1St + ST.halfHeight, ST.xcSt, ST.ycSt + ST.halfHeight);
ST.graps.DrawLine(myPen, ST.xcSt, ST.ycSt + ST.halfHeight, ST.xcSt, ST.x2St);
ST.graps.DrawLine(myPen, ST.xcSt, ST.x2St, ST.x2St, ST.y2St);

}
}
}

Estys 1-Feb-11 5:35am

It would be better to update your question with the code and add a reply to the comment of shakil, that way he will be notified.

yummy02 1-Feb-11 6:49am

Thanks for editing/updating my questions. :)

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TheyCallMeMrJames · Accepted Answer · 2011-02-01T03:31:00

Solution 1

If you have UI elements that are movable then you will need to respond to the event that handles the completion of the move (or the in-progress movement).

When that happens, you need to call the code that draws the lines. You should be able to invalidate the drawing surface or invoke the appropriate refresh method on your drawing surface.

Cheers.

Posted 1-Feb-11 3:31am

TheyCallMeMrJames

Comments

yummy02 3-Feb-11 21:46pm

Thanks :) But Some lines also disappear when I redraw new lines. How can I redraw specific lines and retain others that wasn't move yet by the user. I mean If I have to move specific picturebox, the line connected to this one follow, but the other lines not connected to it remains.