/// <summary>
/// To save the components on a canvas and its properties to file
/// </summary>
public void SaveToFile(Canvas canvas)
{
bf = null;
fs = null;
if(!saved)
{
saveCanvas.FileName = "UntitledCanvas.cnv";
saveCanvas.Filter = "Canvas file(*.cnv)|*.cnv";
DialogResult dr = saveCanvas.ShowDialog();
Filename = saveCanvas.FileName;
if (saveCanvas.FileName != "*.cnv")
{
try
{
if (dr.ToString() == "OK")
{
fs = new FileStream(saveCanvas.FileName, FileMode.Create, FileAccess.Write);
bf = new BinaryFormatter();
bf.Serialize(fs, canvas);
saved = true;
}
}
catch (SerializationException)
{ }
finally
{
if (fs != null) fs.Close();
}
}
}
}
public FlowNetworkSimulator()
{
InitializeComponent();
SetStyle(ControlStyles.OptimizedDoubleBuffer | ControlStyles.UserPaint | ControlStyles.AllPaintingInWmPaint, true);
canvas = new Canvas();
area = new Rectangle(new Point(120, 95), new Size(550, 380));
label8.Text = "Upper flow: " + 50 + "\n" + "Lower flow: " + 50;
if (canvas.Components.Count == 0)
{
flowLabel.Enabled = false;
}
else
{
flowLabel.Enabled = true;
}
}
private void NewButton_Click(object sender, EventArgs e)
{
if (!(canvas.Components.Count() == 0))
{
DialogResult dr = MessageBox.Show("Do you want to save the current diagram before opening?", "Save As", MessageBoxButtons.YesNo);
if (dr.ToString() == "Yes")
{
fh.SaveToFile(canvas);
}
canvas = new Canvas();
this.Refresh();
}
this.Refresh();
}
private void OpenButton_Click(object sender, EventArgs e)
{
if (canvas.Components.Count() == 0)
{
canvas = fh.LoadFromFile();
}
else
{
if (!fh.saved)
{
DialogResult dr = MessageBox.Show("Do you want to save the current diagram before opening?",
"Save As", MessageBoxButtons.YesNoCancel);
if (dr == DialogResult.Yes)
{
fh.SaveToFile(canvas);
fh.saved = true;
}
if (dr == DialogResult.Cancel)
{
return;
}
if (dr == DialogResult.No)
{
canvas = fh.LoadFromFile();
}
}
}
this.Refresh();
}