public static frmFlow Open(Form mdiparent)
{
OpenFileDialog dlg = new OpenFileDialog();
if (dlg.ShowDialog() == DialogResult.OK)
{
String loc = dlg.FileName;
GraphDoc olddoc = GraphDoc.FindDocument(loc);
if (olddoc != null)
{
IList windows = frmFlow.FindWindows(mdiparent, olddoc);
if (windows.Count > 0)
{
frmFlow w = windows[0] as frmFlow;
if (w.Reload())
{
w.Show();
w.Activate();
}
return(w);
}
}
else
{
Stream file = dlg.OpenFile();
if (file != null)
{
GraphDoc doc = null;
try
{
doc = GraphDoc.Load(file, loc);
}
catch (Exception ex)
{
MessageBox.Show(mdiparent, ex.Message, "Error reading graph from a file");
}
finally
{
file.Close();
}
if (doc != null)
{
//frmMain w = new frmMain();
//w.View.Document = doc;
//w.MdiParent = mdiparent;
//w.Show();
//w.Activate();
//return w;
_frmMain.View.Document = doc;
_frmMain.Show();
_frmMain.Activate();
return(_frmMain);
}
}
}
}
return(null);
}
public static IList FindWindows(Form mdiparent, GraphDoc doc)
{
ArrayList windows = new ArrayList();
Form[] children = mdiparent.MdiChildren;
foreach (Form f in children)
{
frmFlow w = f as frmFlow;
if (w != null && w.Doc == doc)
{
windows.Add(w);
}
}
return(windows);
}
public virtual bool Reload()
{
String loc = this.Doc.Location;
if (loc != "")
{
FileStream file = File.Open(loc, FileMode.Open);
GraphDoc olddoc = this.View.Doc;
GraphDoc newdoc = null;
try
{
newdoc = GraphDoc.Load(file, loc);
}
catch (Exception ex)
{
MessageBox.Show(this, ex.Message, "Error reading graph from a file");
return(false);
}
finally
{
file.Close();
}
if (newdoc != null)
{
IList windows = frmFlow.FindWindows(this.MdiParent, olddoc);
foreach (Object obj in windows)
{
frmFlow w = obj as frmFlow;
if (w != null)
{
w.View.Document = newdoc;
}
}
}
}
return(true);
}
