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/* $Id: FormController.cs,v 1.7 2009/06/03 01:10:59 ellson Exp $ $Revision: 1.7 $ */
/* vim:set shiftwidth=4 ts=8: */
/**********************************************************
* This software is part of the graphviz package *
* http://www.graphviz.org/ *
* *
* Copyright (c) 1994-2008 AT&T Corp. *
* and is licensed under the *
* Common Public License, Version 1.0 *
* by AT&T Corp. *
* *
* Information and Software Systems Research *
* AT&T Research, Florham Park NJ *
**********************************************************/
using System;
using System.Collections.Generic;
using System.IO;
using System.Windows.Forms;
namespace Graphviz
{
public class FormController
{
/* document forms need to declare these menus */
public interface IMenus
{
ToolStripMenuItem ExitMenuItem
{
get;
}
ToolStripMenuItem OpenMenuItem
{
get;
}
ToolStripMenuItem WindowMenuItem
{
get;
}
}
public static FormController Instance
{
get { return _instance; }
}
public Form MainForm
{
/* return the topmost document form */
get { return _mainForm; }
}
public event EventHandler MainFormChanged;
public string[] FilesToOpen()
{
/* if user said OK, return the files he selected */
return _openFileDialog.ShowDialog() == DialogResult.OK ? _openFileDialog.FileNames : null;
}
public Form OpenFiles(ICollection<string> fileNames)
{
Form foundForm = null;
foreach (string fileName in fileNames) {
string canonicalPath = Path.GetFullPath(fileName).ToLower();
if (_documentForms.ContainsKey(canonicalPath))
/* document already open */
foundForm = _documentForms[canonicalPath];
else {
/* document needs to be created */
_documentForms[canonicalPath] = foundForm = CreateForm(fileName);
IMenus documentFormMenus = foundForm as IMenus;
if (documentFormMenus != null) {
/* exit menu quits the app */
documentFormMenus.ExitMenuItem.Click += delegate(object sender, EventArgs eventArgs)
{
Application.Exit();
};
/* open menu asks user which files to open and then opens them */
documentFormMenus.OpenMenuItem.Click += delegate(object sender, EventArgs eventArgs)
{
string[] filesToOpen = FilesToOpen();
if (filesToOpen != null)
OpenFiles(filesToOpen);
};
/* window menu shows a list of all document forms, select one to activate it */
documentFormMenus.WindowMenuItem.DropDownOpening += delegate(object sender, EventArgs eventArgs)
{
ToolStripMenuItem windowMenuItem = sender as ToolStripMenuItem;
if (windowMenuItem != null)
{
windowMenuItem.DropDownItems.Clear();
int i = 0;
foreach (Form form in _documentForms.Values)
{
Form innerForm = form;
ToolStripMenuItem formMenuItem = new ToolStripMenuItem(string.Format("{0} {1}", ++i, form.Text));
formMenuItem.Checked = Form.ActiveForm == innerForm;
formMenuItem.Click += delegate(object innerSender, EventArgs innerEventArgs)
{
innerForm.Activate();
};
windowMenuItem.DropDownItems.Add(formMenuItem);
}
}
};
}
/* when form activated, change the main form */
foundForm.Activated += delegate(object sender, EventArgs eventArgs)
{
_mainForm = (Form)sender;
if (MainFormChanged != null)
MainFormChanged(_mainForm, EventArgs.Empty);
};
/* when form closed, remove it from our list; exit when all closed */
foundForm.FormClosed += delegate(object sender, FormClosedEventArgs e)
{
_documentForms.Remove(canonicalPath);
if (_documentForms.Count == 0)
Application.Exit();
};
foundForm.Show();
}
}
return foundForm;
}
private FormController()
{
_openFileDialog = new OpenFileDialog();
_openFileDialog.Filter = "Graphviz graphs (*.dot;*.gv)|*.dot;*.gv|All files (*.*)|*.*";
_openFileDialog.Multiselect = true;
_documentForms = new SortedDictionary<string, Form>();
_mainForm = null;
}
private Form CreateForm(string fileName)
{
return new GraphForm(fileName);
}
private static FormController _instance = new FormController();
private readonly OpenFileDialog _openFileDialog;
private readonly SortedDictionary<string, Form> _documentForms;
private Form _mainForm;
}
}
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