Imports System.Collections.ObjectModel
Imports EgtUILib
Imports EgtCAM5.IniFile

Namespace EgtCAM5

   Public Class ManageLayerExpanderViewModel
      Inherits ViewModelBase

#Region "FIELDS & PROPERTIES"

      ' Expander Header Properties
      Private m_HeaderName As String
      Public Property HeaderName As String
         Get
            Return m_HeaderName
         End Get
         Set(value As String)
            m_HeaderName = value
            OnPropertyChanged("HeaderName")
         End Set
      End Property

      Private m_HeaderColor As SolidColorBrush
      Public Property HeaderColor As SolidColorBrush
         Get
            Return m_HeaderColor
         End Get
         Set(value As SolidColorBrush)
            m_HeaderColor = value
            OnPropertyChanged("HeaderColor")
         End Set
      End Property

      ' Definizione comandi
      Private m_cmdNewPart As ICommand
      Private m_cmdNewLayer As ICommand
      Private m_cmdLayerColor As ICommand
      Private m_cmdTreeViewDoubleClick As ICommand

      ' Lista dei layer
      Private m_LayerList As New ObservableCollection(Of LayerTreeViewItem)
      Public Property LayerList As ObservableCollection(Of LayerTreeViewItem)
         Get
            Return m_LayerList
         End Get
         Set(value As ObservableCollection(Of LayerTreeViewItem))
            m_LayerList = value
         End Set
      End Property

#End Region

#Region "CONSTRUCTOR"

      Sub New()
         Application.Msn.Register(Application.LOADOBJTREE, Sub()
                                                              LoadObjTree()
                                                           End Sub)
         Application.Msn.Register(Application.UPDATEOBJINOBJTREE, Sub(nId As Integer)
                                                                     UpdateObjInObjTree(nId)
                                                                  End Sub)
         Application.Msn.Register(Application.SELECTIDINOBJTREE, Sub(nId As Integer)
                                                                    SelectIdInObjTree(nId)
                                                                 End Sub)
         Application.Msn.Register(Application.CLEAROBJTREE, Sub()
                                                               ClearObjTree()
                                                            End Sub)
         Application.Msn.Register(Application.UPDATEOBJTREE, Sub()
                                                                UpdateObjTree()
                                                             End Sub)
         Application.Msn.Register(Application.UPDATEHEADERNAME, Sub(HeaderName As String)
                                                                   Me.HeaderName = HeaderName
                                                                End Sub)
         Application.Msn.Register(Application.UPDATEHEADERCOLOR, Sub(HeaderColor As Color3d)
                                                                    Me.HeaderColor = New SolidColorBrush(Color.FromArgb(HeaderColor.A, HeaderColor.R, HeaderColor.G, HeaderColor.B))
                                                                 End Sub)
         Application.Msn.Register(Application.UPDATEOBJTREEOLDID, Sub(ObjTreeOldId As Integer)
                                                                     Me.m_nObjTreeOldId = ObjTreeOldId
                                                                  End Sub)
      End Sub

#End Region    ' Constructor

#Region "COMMANDS"

#Region "NewPartCommand"

      ''' <summary>
      ''' Returns a command that do Point.
      ''' </summary>
      Public ReadOnly Property NewPartCommand As ICommand
         Get
            If m_cmdNewPart Is Nothing Then
               m_cmdNewPart = New RelayCommand(AddressOf NewPart, AddressOf CanNewPart)
            End If
            Return m_cmdNewPart
         End Get
      End Property

      ''' <summary>
      ''' Execute the Point.  This method is invoked by the PointCommand.
      ''' </summary>
      Public Sub NewPart(ByVal param As Object)
         Application.Msn.NotifyColleagues(Application.EXECUTECOMMAND, Controller.CMD.NEWPART)
      End Sub

      ''' <summary>
      ''' Returns always true.
      ''' </summary>
      Private Function CanNewPart(ByVal param As Object) As Boolean
         Return True
      End Function

#End Region ' NewPartCommand

#Region "NewLayerCommand"

      ''' <summary>
      ''' Returns a command that do Point.
      ''' </summary>
      Public ReadOnly Property NewLayerCommand As ICommand
         Get
            If m_cmdNewLayer Is Nothing Then
               m_cmdNewLayer = New RelayCommand(AddressOf NewLayer, AddressOf CanNewLayer)
            End If
            Return m_cmdNewLayer
         End Get
      End Property

      ''' <summary>
      ''' Execute the Point.  This method is invoked by the PointCommand.
      ''' </summary>
      Public Sub NewLayer(ByVal param As Object)
         Application.Msn.NotifyColleagues(Application.EXECUTECOMMAND, Controller.CMD.NEWLAYER)
      End Sub

      ''' <summary>
      ''' Returns always true.
      ''' </summary>
      Private Function CanNewLayer(ByVal param As Object) As Boolean
         Return True
      End Function

#End Region ' NewLayerCommand

#Region "LayerColorCommand"

      ''' <summary>
      ''' Returns a command that do Point.
      ''' </summary>
      Public ReadOnly Property LayerColorCommand As ICommand
         Get
            If m_cmdLayerColor Is Nothing Then
               m_cmdLayerColor = New RelayCommand(AddressOf LayerColor, AddressOf CanLayerColor)
            End If
            Return m_cmdLayerColor
         End Get
      End Property

      ''' <summary>
      ''' Execute the Point.  This method is invoked by the PointCommand.
      ''' </summary>
      Public Sub LayerColor(ByVal param As Object)
         Application.Msn.NotifyColleagues(Application.EXECUTECOMMAND, Controller.CMD.LAYERCOLOR)
      End Sub

      ''' <summary>
      ''' Returns always true.
      ''' </summary>
      Private Function CanLayerColor(ByVal param As Object) As Boolean
         Return True
      End Function

#End Region ' LayerColorCommand

#Region "TreeViewDoubleClickCommand"

      ''' <summary>
      ''' Returns a command that do Point.
      ''' </summary>
      Public ReadOnly Property TreeViewDoubleClickCommand As ICommand
         Get
            If m_cmdTreeViewDoubleClick Is Nothing Then
               m_cmdTreeViewDoubleClick = New RelayCommand(AddressOf TreeViewDoubleClick, AddressOf CanTreeViewDoubleClick)
            End If
            Return m_cmdTreeViewDoubleClick
         End Get
      End Property

      ''' <summary>
      ''' Execute the Point.  This method is invoked by the PointCommand.
      ''' </summary>
      Public Sub TreeViewDoubleClick(ByVal param As Object)
         If m_nObjTreeOldId <> GDB_ID.NULL Then
            Application.Msn.NotifyColleagues(Application.SETLASTINTEGER, m_nObjTreeOldId)
            Application.Msn.NotifyColleagues(Application.EXECUTECOMMAND, Controller.CMD.SETCURRPARTLAYER)
         End If
      End Sub

      ''' <summary>
      ''' Returns always true.
      ''' </summary>
      Private Function CanTreeViewDoubleClick(ByVal param As Object) As Boolean
         Return True
      End Function

#End Region ' TreeViewDoubleClickCommand

#End Region    ' Commands

#Region "METHODS"

      Private WithEvents ObjTreeTimer As New System.Windows.Threading.DispatcherTimer
      Private m_nObjTreeOldId As Integer = GDB_ID.NULL
      Private m_nObjTreeMenuId As Integer = GDB_ID.NULL

      Private Sub ObjTreeTickEvent(source As Object, e As EventArgs) Handles ObjTreeTimer.Tick
         If m_nObjTreeOldId <> GDB_ID.NULL Then
            EgtResetMark(m_nObjTreeOldId)
            EgtDraw()
         End If
         ObjTreeTimer.Stop()
      End Sub

      Public Sub LoadObjTree()
         Dim nOldId As Integer = ClearObjTree()
         AddGroupInObjTree(GDB_ID.ROOT, GDB_LV.USER, 0, LayerList)
         If nOldId <> GDB_ID.NULL Then
            SelectIdInObjTree(nOldId)
            'UpdateObjDataInObjTree(m_nObjTreeOldId)
         Else
            'tBoxInfo.Text = String.Empty
         End If
      End Sub

      Private Function ClearObjTree() As Integer
         Dim nOldId As Integer = RevertOldIdInObjTree()
         LayerList.Clear()
         Return nOldId
      End Function

      Private Sub AddGroupInObjTree(ByVal nGroupId As Integer, ByVal nLevel As Integer, ByVal nDepth As Integer, ByRef PrevNodColl As ObservableCollection(Of LayerTreeViewItem))

         Dim CurrNodColl As ObservableCollection(Of LayerTreeViewItem)

         If nGroupId = GDB_ID.ROOT Then
            CurrNodColl = PrevNodColl
         Else
            ' livello
            Dim nObjLev As Integer = GDB_LV.USER
            EgtGetLevel(nGroupId, nObjLev)
            If nObjLev = GDB_LV.TEMP Then
               nLevel = GDB_LV.TEMP
            ElseIf nLevel = GDB_LV.USER Then
               nLevel = nObjLev
            End If
            ' tipo
            Dim nGroupType As Integer = 0         ' 0=gruppo generico, 1=pezzo, 2=layer
            If nLevel = GDB_LV.USER Then
               nGroupType = nDepth
            End If
            ' nome
            Dim sName As String = String.Empty
            Dim sText As String = String.Empty
            If EgtGetName(nGroupId, sName) Then
               If nGroupType = 1 Then
                  sText = sName + " (Part " + nGroupId.ToString + ")"
               ElseIf nGroupType = 2 Then
                  sText = sName + " (Layer " + nGroupId.ToString + ")"
               Else
                  sText = sName + " (Group " + nGroupId.ToString + ")"
               End If
            Else
               If nGroupType = 1 Then
                  sText = "Part " + nGroupId.ToString
               ElseIf nGroupType = 2 Then
                  sText = "Layer " + nGroupId.ToString
               Else
                  sText = "Group " + nGroupId.ToString
               End If
            End If
            ' per visualizzare oggetti di livello diverso da utente, si deve avere il permesso
            If nLevel <> GDB_LV.USER And nUserLevel() < 5 Then
               Return
            End If
            ' inserisco il nodo nell'albero
            Dim CurrColor As Color3d
            EgtGetCalcColor(nGroupId, CurrColor)
            Dim sImage As String = TypeToImageInObjTree(GDB_TY.GROUP, nGroupType)
            Dim CurrNod As LayerTreeViewItem = New LayerTreeViewItem(nGroupId, sText, sImage, CurrColor)
            PrevNodColl.Add(CurrNod)
            CurrNodColl = CurrNod.Items
            Dim nStat As Integer = GDB_ST.ON_
            EgtGetStatus(nGroupId, nStat)
            CurrNod.OnOff = (nStat <> GDB_ST.OFF)
         End If

         Dim nObjs As Integer = EgtGetGroupObjs(nGroupId)
         If (nObjs > 20000) Then
            Dim sText As String = "Too many entities (" + nObjs.ToString() + ")"
            CurrNodColl.Add(New LayerTreeViewItem(GDB_ID.NULL, sText))
            Return
         End If

         Dim nId As Integer = EgtGetFirstInGroup(nGroupId)
         While nId <> GDB_ID.NULL
            'recupero il tipo di nodo
            Dim nType As Integer = EgtGetType(nId)
            'se gruppo
            If nType = GDB_TY.GROUP Then
               AddGroupInObjTree(nId, nLevel, nDepth + 1, CurrNodColl)
               'se oggetto geometrico
            ElseIf nType >= GDB_TY.GEO_VECTOR Then
               Dim sTitle As String = String.Empty
               EgtGetTitle(nId, sTitle)
               Dim sName As String = String.Empty
               Dim sText As String = String.Empty
               If EgtGetName(nId, sName) Then
                  sText = sName + " (" + sTitle + " " + nId.ToString + ")"
               Else
                  sText = sTitle + " " + nId.ToString
               End If
               Dim CurrColor As Color3d
               EgtGetCalcColor(nGroupId, CurrColor)
               Dim sImage As String = TypeToImageInObjTree(nType, nDepth)
               Dim CurrNod As LayerTreeViewItem = New LayerTreeViewItem(nId, sText, sImage, CurrColor)
               CurrNodColl.Add(CurrNod)
               Dim nStat As Integer = GDB_ST.ON_
               EgtGetStatus(nId, nStat)
               CurrNod.OnOff = (nStat <> GDB_ST.OFF)
            End If
            'passo al successivo
            nId = EgtGetNext(nId)
         End While
      End Sub

      Private Function TypeToImageInObjTree(ByVal nType As Integer, ByVal nSubType As Integer) As String

         Select Case nType
            Case GDB_TY.GROUP
               If nSubType = 1 Then
                  Return "/Resources/TreeView/Folder.png"
               ElseIf nSubType = 2 Then
                  Return "/Resources/TreeView/Folder.png"
               Else
                  Return "/Resources/TreeView/Group.ico"
               End If
            Case GDB_TY.GEO_VECTOR
               Return "/Resources/TreeView/Vector.ico"
            Case GDB_TY.GEO_POINT
               Return "/Resources/TreeView/Point.ico"
            Case GDB_TY.GEO_FRAME
               Return "/Resources/TreeView/Frame.ico"
            Case GDB_TY.CRV_LINE
               Return "/Resources/TreeView/Line.ico"
            Case GDB_TY.CRV_ARC
               Return "/Resources/TreeView/Arc.ico"
            Case GDB_TY.CRV_BEZ
               Return "/Resources/TreeView/CBezier.ico"
            Case GDB_TY.CRV_COMPO
               Return "/Resources/TreeView/CCompo.ico"
            Case GDB_TY.SRF_MESH
               Return "/Resources/TreeView/STriMesh.ico"
            Case GDB_TY.SRF_FRGN
               Return "/Resources/TreeView/Folder.png"
            Case GDB_TY.EXT_TEXT
               Return "/Resources/TreeView/Text.ico"
         End Select
         Return ""
      End Function

      Private Sub UpdateObjTree()
         ' per aggiornare l'albero senza ricostruirlo da capo
         ' se c'è una entità corrente, ne aggiorno i dati
         If m_nObjTreeOldId <> GDB_ID.NULL Then
            'UpdateObjDataInObjTree(m_nObjTreeOldId)
         End If
      End Sub

      'Private Sub ObjTree_AfterSelect(ByVal sender As Object, ByVal e As TreeViewEventArgs) Handles TreeView1.AfterSelect
      '   ' verifico che il select derivi da azione utente
      '   If e.Action = TreeViewAction.Unknown Then
      '      Return
      '   End If
      '   ' recupero l'Id del nuovo oggetto selezionato
      '   Dim nId As Integer
      '   If Not Int32.TryParse(e.Node.Name, nId) Then
      '      Return
      '   End If
      '   UpdateObjInObjTree(nId)
      'End Sub

      'Private Sub ObjTree_MouseUp(ByVal sender As Object, e As MouseEventArgs) Handles TreeView1.MouseUp
      '   ' determino Id di eventuale item sotto il mouse
      '   Dim nId As Integer = GDB_ID.NULL
      '   Dim TNode As TreeNode = TreeView1.GetNodeAt(e.Location)
      '   If TNode IsNot Nothing Then
      '      Int32.TryParse(TNode.Name, nId)
      '   End If
      '   ' se Id coincide con il corrente
      '   If nId <> GDB_ID.NULL And nId = m_nObjTreeOldId Then
      '      ' evidenzio
      '      EgtSetMark(m_nObjTreeOldId)
      '      EgtDraw()
      '      ' lancio timer per successiva de-evidenziazione
      '      ObjTreeTimer.Stop()
      '      ObjTreeTimer.Start()
      '   End If
      '   ' se rilascio tasto destro
      '   If e.Button = Windows.Forms.MouseButtons.Right Then
      '      ' Id pezzo sotto il mouse
      '      m_nObjTreeMenuId = nId
      '      ' verifico stato visualizzazione per abilitare voci menù
      '      Dim nStat As GDB_ST = GDB_ST.ON_
      '      Dim bOn As Boolean = EgtGetCalcStatus(m_nObjTreeMenuId, nStat) And nStat <> GDB_ST.OFF
      '      For Each Item As ToolStripItem In ContextMenuTreeView1.Items
      '         If Item.Name = "cmdSetName" Or Item.Name = "cmdSetInfo" Then
      '            Item.Enabled = True
      '         Else
      '            Item.Enabled = bOn
      '         End If
      '      Next
      '      ContextMenuTreeView1.Show(TreeView1, e.Location)
      '   End If
      'End Sub

      Private Sub UpdateObjInObjTree(ByVal nId As Integer)
         ' ripristino eventuale vecchio oggetto selezionato
         RevertOldIdInObjTree()
         ' stampa dei dati del nuovo oggetto
         'UpdateObjDataInObjTree(nId)
         ' evidenzio l'oggetto
         EgtSetMark(nId)
         m_nObjTreeOldId = nId
         ' imposto il ridisegno della scena
         EgtDraw()
         ' lancio timer per successiva de-evidenziazione
         ObjTreeTimer.Stop()
         ObjTreeTimer.Start()
      End Sub

      Private Function RevertOldIdInObjTree() As Integer
         ' salvo il vecchio Id
         Dim nOldId As Integer = m_nObjTreeOldId
         ' se non nullo...
         If EgtExistsObj(m_nObjTreeOldId) Then
            ' smarco l'oggetto
            EgtResetMark(m_nObjTreeOldId)
            ' annullo oggetto da ripristinare
            m_nObjTreeOldId = GDB_ID.NULL
         End If
         Return nOldId
      End Function

      Private Function SelectIdInObjTree(ByVal nId As Integer) As Boolean
         Dim tNode As LayerTreeViewItem = SearchIdInLayerList(nId)
         If Not IsNothing(tNode) Then
            tNode.IsSelected = True
            tNode.IsExpanded = True
            m_nObjTreeOldId = nId
            Return True
         Else
            m_nObjTreeOldId = GDB_ID.NULL
            Return False
         End If
      End Function

      Private Function SearchIdInLayerList(nId As Integer) As LayerTreeViewItem
         For Each Item In LayerList
            If Item.Id = nId Then
               Return Item
            Else
               Return SearchIdInLayerList(Item.Id)
            End If
         Next
         Return Nothing
      End Function

      'Private Sub MenuObjTree_ItemClicked(sender As Object, e As ToolStripItemClickedEventArgs) Handles ContextMenuTreeView1.ItemClicked
      '   If e.ClickedItem.Name = "cmdSelectPartLayObj" Then
      '      m_Controller.SetLastInteger(m_nObjTreeMenuId)
      '      m_Controller.ExecuteCommand(CMD.SELECTPARTLAYEROBJ)
      '   ElseIf e.ClickedItem.Name = "cmdDeselectPartLayObj" Then
      '      m_Controller.SetLastInteger(m_nObjTreeMenuId)
      '      m_Controller.ExecuteCommand(CMD.DESELECTPARTLAYEROBJ)
      '   ElseIf e.ClickedItem.Name = "cmdSetName" Then
      '      m_Controller.SetLastInteger(m_nObjTreeMenuId)
      '      m_Controller.ExecuteCommand(CMD.SETNAME)
      '   ElseIf e.ClickedItem.Name = "cmdSetInfo" Then
      '      m_Controller.SetLastInteger(m_nObjTreeMenuId)
      '      m_Controller.ExecuteCommand(CMD.SETINFO)
      '   ElseIf e.ClickedItem.Name = "cmdRelocatePartLayObj" Then
      '      m_Controller.SetLastInteger(m_nObjTreeMenuId)
      '      m_Controller.ExecuteCommand(CMD.RELOCATEPARTLAYEROBJ)
      '   ElseIf e.ClickedItem.Name = "cmdCopyPartLayObj" Then
      '      m_Controller.SetLastInteger(m_nObjTreeMenuId)
      '      m_Controller.ExecuteCommand(CMD.COPYPARTLAYEROBJ)
      '   ElseIf e.ClickedItem.Name = "cmdDeletePartLayObj" Then
      '      m_Controller.SetLastInteger(m_nObjTreeMenuId)
      '      m_Controller.ExecuteCommand(CMD.DELETE)
      '   ElseIf e.ClickedItem.Name = "cmdSavePartLay" Then
      '      ContextMenuTreeView1.Close()
      '      Dim sDir As String = String.Empty
      '      GetPrivateProfileString(S_GENERAL, K_LASTNGEOBJDIR, "", sDir, m_sIniFile)
      '      Dim nType As NGE = GetPrivateProfileInt(S_GEOMDB, K_SAVETYPE, NGE.CMPTEXT, m_sIniFile)
      '      m_Controller.SaveObject(m_nObjTreeMenuId, sDir, nType)
      '   End If
      'End Sub

#End Region    ' Methods

   End Class

End Namespace