Using Silverlight in Enterprise: RAD of User Friendly Database Access

/********************************************************************
 *  FulcrumWeb RAD Framework - Fulcrum of your business             *
 *  Copyright (c) 2002-2009 FulcrumWeb, ALL RIGHTS RESERVED         *
 *                                                                  *
 *  THE SOURCE CODE CONTAINED WITHIN THIS FILE AND ALL RELATED      *
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 *  AGREEMENT FOR INFORMATION ON ADDITIONAL RESTRICTIONS.           *
 ********************************************************************/

using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.IO;
using System.Reflection;
using System.Windows;
using System.Windows.Browser;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Xml.Linq;
using System.Linq;
using Framework.Silverlight.Client.AppServer;
using Liquid;

namespace Framework.Silverlight.Client
{
  /// <summary>
  /// Represents the main page control.(main application window) 
  /// </summary>
  public partial class CxMainPage
  {
    
    public event EventHandler ApplicationStarting;
    private readonly CxAppContext m_Context;
    private CxEntityMarks m_EntityMarks;
    private CxEntityMark m_SelectedEntityMark;
    private IEnumerable<CxClientSectionMetadata> m_Sections;
    //----------------------------------------------------------------------------
    /// <summary>
    /// Initializes a new instance of the CxMainPage class.
    /// </summary
    public CxMainPage()
    {
      InitializeComponent();
      dialogPlaceHolder.RootUi = this;
      m_Context = CxAppContext.Instance;
      m_Context.UiThreadDispatcher = Dispatcher;
      m_Context.NavigationChanged += m_context_NavigationChanged;
      m_Context.WorkspaceListChanged += new EventHandler(m_Context_WorkspaceListChanged);

      CxAppContext.Instance.FrameContainer = m_frameHolder;

      CxAppContext.Instance.RootDialogContainer = dialogPlaceHolder;

      toolBox.SelectedSectionChanged += m_toolBox_SelectedSectionChanged;
      Loaded += Page_Loaded;

      toolBox.DataContext = m_Context;
      m_historyTree.DataContext = m_Context;

      m_Context.HintsCanvas = hintsCanvas;
      m_Context.RootWaitingControl = this; 
    }
  
    //-----------------------------------------------------------------------------------
    /// <summary>
    /// Handles SizeChanged event.
    /// </summary>
    private void UserControl_SizeChanged(object sender, SizeChangedEventArgs e)
    {
      MeasureSplitter();
      CalculatesSpinner();
    }

    //----------------------------------------------------------------------------
    /// <summary>
    /// Measures splitter position.
    /// </summary>
    private void MeasureSplitter()
    {
      clmToolBox.Width = new GridLength(ActualWidth * 18 / 100);
      clmToolBox.MaxWidth = ActualWidth * 95 / 100;
    }

    //----------------------------------------------------------------------------
    /// <summary>
    /// Handles Loaded event.
    /// </summary>
    private void LayoutRoot_Loaded(object sender, RoutedEventArgs e)
    {
      MeasureSplitter();
    }

    //----------------------------------------------------------------------------
    /// <summary>
    /// Saves static metadata, such as static rowsources, 
    /// assemblies metadata, classes metadata etc. in memory. 
    /// </summary>
    /// <param name="portal">CxPortalMetadata with static metadata.</param>
    private void SaveStaticMetadata(CxClientPortalMetadata portal)
    {
      if (portal == null)
      {
        return;
      }

      m_Context.StaticRowSources.Clear();
      m_Context.StaticRowSources.AddRange(portal.StaticRowsources);

      m_Context.AssembliesMetadata.Clear();
      foreach (CxClientAssemblyMetadata assembly in portal.Assemblies)
      {
        m_Context.AssembliesMetadata.Add(assembly.Id, assembly);
      }

      m_Context.ClassesMetadata.Clear();
      foreach (CxClientClassMetadata classMetadata in portal.Classes)
      {
        m_Context.ClassesMetadata.Add(classMetadata.Id, classMetadata);
      }

      m_Context.LayoutMetadata.Clear();
      foreach (CxLayoutElement frameMetadata in portal.Frames)
      {
        m_Context.LayoutMetadata.Add(frameMetadata.Id, frameMetadata);
      }

      m_Context.ImagesMetadata.Clear();
      foreach (CxClientImageMetadata imageMetadata in portal.Images)
      {
        m_Context.ImagesMetadata.Add(imageMetadata.Id, imageMetadata);
      }

      CxAppContext.Instance.Assemblies.Clear();
      CxAppContext.Instance.Assemblies["APP.SILVERLIGHT.CLIENT"] = CxAppContext.Instance.MainAssembly;
      foreach (KeyValuePair<string, byte[]> pair in portal.AssembliesData)
      {
        using (MemoryStream ms = new MemoryStream())
        {
          ms.Write(pair.Value, 0, pair.Value.Length);
          AssemblyPart assemblyPart = new AssemblyPart();
          Assembly assembly = assemblyPart.Load(ms);
          CxAppContext.Instance.Assemblies.Add(pair.Key, assembly);
        }
      }

    }

   
    //-------------------------------------------------------------------------
    /// <summary>
    /// Handler raised when the search text box gets a focus.
    /// </summary>
    private void tbSearch_GotFocus(object sender, RoutedEventArgs e)
    {
      // Imitating "smart" textbox.
      if (tbSearch.Text == "Global Search")
      {
        tbSearch.Text = string.Empty;
        tbSearch.Foreground = new SolidColorBrush(Colors.Black);
      }
    }
    //-------------------------------------------------------------------------
    /// <summary>
    /// Handler raised when the search text box looses its focus.
    /// </summary>
    private void tbSearch_LostFocus(object sender, RoutedEventArgs e)
    {
      // Imitating "smart" textbox.
      if (string.IsNullOrEmpty(tbSearch.Text.Trim()))
      {
        tbSearch.Text = "Global Search";
        tbSearch.Foreground = new SolidColorBrush(Colors.LightGray);
      }
    }
    //-------------------------------------------------------------------------
    /// <summary>
    /// Initializes main menu: items, images, etc. 
    /// </summary>
    private void InitMainMenu()
    {
      IxImageProvider imageProvider = (IxImageProvider)CxTypeActivator.CreateInstance(m_Context.DefaultImageProviderClassId);
      btnRefresh.Image.Source = new BitmapImage(new Uri(imageProvider[701], UriKind.RelativeOrAbsolute));
      btnHistory.Image.Source = new BitmapImage(new Uri(imageProvider[702], UriKind.RelativeOrAbsolute));
      btnFavorites.Image.Source = new BitmapImage(new Uri(imageProvider[703], UriKind.RelativeOrAbsolute));
      btnSiteMap.Image.Source = new BitmapImage(new Uri(imageProvider[704], UriKind.RelativeOrAbsolute));
    }
    
    //----------------------------------------------------------------------------
    /// <summary>
    /// Handles MouseLeftButtonUp event.
    /// </summary>
    private void btnRefresh_MouseLeftButtonUp(object sender, System.Windows.Input.MouseButtonEventArgs e)
    {
      m_Context.RefreshActiveFrame();
    }
    //-------------------------------------------------------------------------
    /// <summary>
    /// Handles Click event.
    /// </summary>
    private void CxGlassButton_Click(object sender, EventArgs e)
    {
      m_Menu.Show();
    }
    //-------------------------------------------------------------------------
    /// <summary>
    /// Handles MouseDown event.
    /// </summary>
    private void MainPage_MouseDown(object sender, MouseButtonEventArgs e)
    {
      if (dialogPlaceHolder.DialogLoaded != true)
      {
        m_Menu.Hide();
      }
    }
    //----------------------------------------------------------------------------
    /// <summary>
    /// Handles KeyDown event.
    /// </summary>
    private void tbSearch_KeyDown(object sender, System.Windows.Input.KeyEventArgs e)
    {
      if (e.Key == Key.Enter)
        throw new ExUnderConstructionException();
    }
    //----------------------------------------------------------------------------
    /// <summary>
    /// Handles MouseLeave event.
    /// </summary>
    private void UserControl_MouseLeave(object sender, MouseEventArgs e)
    {
      CancelScrollingDrag(this);
    }

    //----------------------------------------------------------------------------
    /// <summary>
    /// Try to cancel scrolling in scroll bars.
    /// (workaround, related on Silverlight 2.0 bug with scroll bars when Windowless="true")
    /// </summary>
    /// <param name="root"></param>
    private void CancelScrollingDrag(DependencyObject root)
    {
      int childCount = VisualTreeHelper.GetChildrenCount(root);

      for(int i = 0; i < childCount; i++)
      {
        DependencyObject child = VisualTreeHelper.GetChild(root, i);
        Thumb thumb = child as Thumb;
        if (thumb != null)
        {
          thumb.CancelDrag();
        }
        else
        {
          CancelScrollingDrag(child);
        }
      }
    }

    //----------------------------------------------------------------------------
    /// <summary>
    /// Handles MouseLeftButtonDown event.
    /// </summary>
    private void vSplitter_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
    {
      HtmlPage.Window.Invoke("HideAllFrames");
    }

    //----------------------------------------------------------------------------
    /// <summary>
    /// Handles MouseLeftButtonUp event.
    /// </summary>
    private void vSplitter_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
    {
      HtmlPage.Window.Invoke("ShowAllFrames");
    }

    //----------------------------------------------------------------------------
    /// <summary>
    /// Handles CxDialogPlaceHolder.PopupDialogLoaded event. 
    /// </summary>
    void dialogPlaceHolder_PopupDialogLoaded(object sender, EventArgs e)
    {
      hintsCanvas.Children.Clear();
    }
   
    //----------------------------------------------------------------------------
    /// <summary>
    /// Handles clickCollector.MouseLeftButtonDown event
    /// </summary>
    private void clickCollector_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
    {
      HideFavoritesList();
      HideHistoryList();
      HideSiteMap();
    }
      
    //----------------------------------------------------------------------------
    /// <summary>
    /// Handles 'Logout' button click.
    /// </summary>
    private void btnLogout_MouseLeftDown(object sender, MouseButtonEventArgs e)
    {
      CxAppContext.Instance.Logout();
    }

  

   

  

   
  }
}