WF4 Custom activities for message mediation

//*****************************************************************************
//    Description.....WF4.5 Message Mediation Library
//                                
//    Author..........Roman Kiss, rkiss@pathcom.com
//    Copyright © 2009 ATZ Consulting Inc. (see included license.rtf file)         
//                        
//    Date Created:    07/07/09
//
//    Date        Modified By     Description
//-----------------------------------------------------------------------------
//    07/07/09    Roman Kiss     Initial Revision
//    10/10/12    Roman Kiss     Upadate 4.5
//*****************************************************************************
//
#region Namespaces
using System;
using System.IO;
using System.Windows;
using System.Windows.Forms;
using ManageableServicesConsole.UserControls;
#endregion

namespace RKiss.WorkflowDesignerTester
{
    public partial class Form1 : Form
    {
        private string filepath;
        public DateTime? LoadedDT { get; set; }
        public string LoadedXaml { get; set; }

        public Form1()
        {
            InitializeComponent();
            this.LoadedDT = null;
        }

        public WorkflowDesignerUserControl Designer
        {
            get { return this.workflowDesignerUserControl1; }
        }

        private void saveToolStripMenuItem_Click(object sender, EventArgs e)
        {
            this.SaveXamlFile();           
        }

        private void openToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if(this.Designer.IsDirty)
            {
                var result = System.Windows.MessageBox.Show("Would you like to save all changes?", "Open new xaml", MessageBoxButton.YesNoCancel, MessageBoxImage.Question);
                if (result == MessageBoxResult.Yes)
                    this.SaveXamlFile();
                else if (result == MessageBoxResult.Cancel)
                    return;
            }
            var dialog = new OpenFileDialog()
            {
                Filter = "xaml|*.xaml|xamlx|*.xamlx|all|*.*",
                CheckFileExists = true,
                DefaultExt = ".xaml",
                Multiselect = false,
                RestoreDirectory = true,
                Title = "Open xaml file",
            };
            if (dialog.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                this.Filepath = dialog.FileName;
                this.LoadXamlFile();               
            }
        }

        private void newToolStripMenuItem_Click(object sender, EventArgs e)
        {
            this.LoadedDT = DateTime.Now;
            this.LoadedXaml = string.Empty;
            this.Designer.Xaml = string.Empty;
        }

        private void saveAsToolStripMenuItem1_Click(object sender, EventArgs e)
        {
            var dialog = new SaveFileDialog()
            {
                CheckPathExists = true,
                Filter = "xaml|*.xaml|xamlx|*.xamlx",
                AddExtension = true,
                OverwritePrompt = true,                
                CheckFileExists = false,
                DefaultExt = ".xaml",
                RestoreDirectory = true,
                Title = "Save xaml file",
            };
            if (dialog.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                if(string.IsNullOrEmpty(dialog.FileName) == false)
                    this.SaveAsXamlFile(dialog.FileName);
            }
        }

        private void exitToolStripMenuItem_Click(object sender, EventArgs e)
        {
            this.Close();
        }

        public void LoadXamlFile()
        {
            this.LoadXamlFile(this.Filepath);
        }
        public void LoadXamlFile(string filename)
        {
            if (File.Exists(filename))
            {
                this.LoadedDT = DateTime.Now;
                this.LoadedXaml = File.ReadAllText(filename);
                this.Designer.Xaml = this.LoadedXaml;               
            }
        }

        public void SaveXamlFile()
        {
            this.SaveXamlFile(this.Filepath);
        }
        public void SaveXamlFile(string filename)
        {
            if (this.Designer.IsDirty)
            {
                var result = System.Windows.MessageBox.Show("Would you like to save all changes?", "Open new xaml", MessageBoxButton.YesNoCancel, MessageBoxImage.Question);
                if (result == MessageBoxResult.Yes)
                    File.WriteAllText(filename, this.Designer.Xaml);
                else if (result == MessageBoxResult.Cancel)
                    return;
            }
            this.Designer.IsDirty = false;
        }

        public void SaveAsXamlFile(string filename)
        {
            this.Filepath = filename;
            File.WriteAllText(filename, this.Designer.Xaml);
            this.Designer.IsDirty = false;
        }

        public string Filepath
        {
            get { return filepath; }
            set
            {
                filepath = value;
                this.Text = "Workflow Designer (" + value + ")";
            }
        }

        private void aboutWorkflowDesignerToolStripMenuItem_Click(object sender, EventArgs e)
        {
            new RKiss.WorkflowDesignerTester.Dialogs.WorkflowDesignerTesterAboutBox().ShowDialog();
        }
    }
}