/**
* CreateTopLevelWindow implements creating a new form. This is the real 'constructor'.
* First, we check if the fileName matches any of the Open Forms in the MultiSDIApplication. If it
* does, we just activate that form. If it doesn't we create a new one using OpenFile, a method found
* in this class (TopLevelForm) to open a file, then we activate the new window.
*/
public static TopLevelForm CreateTopLevelWindow(string fileName)
{
// If fileName is not empty
if (!string.IsNullOrEmpty(fileName))
{
// Loop through the open forms in MultiSDIApplication
foreach (TopLevelForm openForm in Application.OpenForms)
{
// If the file we're trying to open is already open, i.e. file names match
if (string.Compare(openForm.fileName, fileName, true) == 0)
{
// Bring form to top
openForm.Activate();
return(openForm);
}
}
}
// Otherwise, create a new one with the given fileName
TopLevelForm form = new TopLevelForm();
form.OpenFile(fileName);
form.Show();
// Bring form to top
form.Activate();
return(form);
}
/**
* CreateTopLevelWindow helper method. Parses the command line args and grabs the file name, then passes the file
* name to TopLevelForm's CreateTopLevelWindow method to create a Top Level Window with the given file name.
*/
TopLevelForm CreateTopLevelWindow(ReadOnlyCollection <string> args)
{
// Get file name, if provided
string fileName = (args.Count > 0 ? args[0] : null);
// Create new top level form
return(TopLevelForm.CreateTopLevelWindow(fileName));
}
private void openToolStripMenuItem_Click(object sender, EventArgs e)
{
using (OpenFileDialog dlg = new OpenFileDialog())
{
if (dlg.ShowDialog() != DialogResult.OK)
{
return;
}
using (Stream stream =
new FileStream(dlg.FileName, FileMode.Open, FileAccess.Read))
{
IFormatter formatter = new BinaryFormatter();
Document document = (Document)formatter.Deserialize(stream);
TopLevelForm form = CreateTopLevelWindow(dlg.FileName);
form.doc = document;
form.Text = dlg.FileName;
}
}
}