Imports System.Runtime.InteropServices
Imports System.Text
Imports System.Math
Imports System.IO
Imports TestEIn.EgtInterface
Imports TestEIn.GenInterface


Public Class Form1

   Private m_sIniFile As String = String.Empty
   Private m_sCurrFile As String = String.Empty
   Private m_nMarkObj As Integer = GDB_ID.NULL

'-------------------------------- Form ------------------------------------------------------------
   Private Sub Form1_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
      ' installo aggiornamento interfaccia
      AddHandler System.Windows.Forms.Application.Idle, AddressOf Application_Idle
      'Title
      EmitTitle()
      'Impostazione path Ini file
      m_sIniFile = Application.StartupPath & "\TestEIn.ini"
      'Inizializzazione generale di EgtInterface
      EgtInit(0, Application.StartupPath & "\TestEngine.log")
      'imposto chiave di protezione
      Dim sKey As String = String.Empty
      GetPrivateProfileString("General", "Key", "", sKey, m_sIniFile)
      EgtSetKey(sKey)
      'imposto dir font Nfe e font default
      Dim sNfeDir As String = String.Empty
      GetPrivateProfileString("GeomDB", "NfeFontDir", "", sNfeDir, m_sIniFile)
      Dim sDefFont As String = String.Empty
      GetPrivateProfileString("GeomDB", "DefaultFont", "", sDefFont, m_sIniFile)
      EgtSetFont(sNfeDir, sDefFont)
      ' imposto colore di default
      Dim DefColor As New Color3d(0, 0, 0)
      GetPrivateProfileColor("GeomDB", "DefaultColor", DefColor, m_sIniFile)
      Scene1.SetDefaultMaterial(DefColor)
      ' imposto colori sfondo
      Dim BackTopColor As New Color3d(192, 192, 192)
      GetPrivateProfileColor("Scene", "BackTop", BackTopColor, m_sIniFile)
      Dim BackBotColor As New Color3d(192, 192, 192)
      GetPrivateProfileColor("Scene", "BackBottom", BackBotColor, m_sIniFile)
      Scene1.SetViewBackground(BackTopColor, BackBotColor)
      ' imposto colore di evidenziazione
      Dim MarkColor As New Color3d(255, 255, 0)
      GetPrivateProfileColor("Scene", "Mark", MarkColor, m_sIniFile)
      Scene1.SetMarkMaterial(MarkColor)
      ' imposto tipo e colore del rettangolo di zoom
      Dim bOutline As Boolean = True
      Dim ZwColor As Color3d
      ZwColor.Setup(0, 0, 0)
      GetPrivateProfileZoomWin("Scene", "ZoomWin", bOutline, ZwColor, m_sIniFile)
      Scene1.SetZoomWinAttribs(bOutline, ZwColor)
      ' imposto colore della linea di distanza
      Dim DstLnColor As Color3d
      DstLnColor.Setup(255, 0, 0)
      GetPrivateProfileColor("Scene", "DistLine", DstLnColor, m_sIniFile)
      Scene1.SetDistLineMaterial(DstLnColor)
      ' imposto parametri OpenGL
      Dim nDriver As Integer = GetPrivateProfileInt("OpenGL", "Driver", 3, m_sIniFile)
      Dim b2Buff As Boolean = (GetPrivateProfileInt("OpenGL", "DoubleBuffer", 1, m_sIniFile) <> 0)
      Dim nColorBits As Integer = GetPrivateProfileInt("OpenGL", "ColorBits", 32, m_sIniFile)
      Dim nDepthBits As Integer = GetPrivateProfileInt("OpenGL", "DepthBits", 32, m_sIniFile)
      Scene1.SetViewAttributes(nDriver, b2Buff, nColorBits, nDepthBits)
      ' inizializzo scena
      Scene1.Init()
      ' imposto i dati della griglia
      EgtSetGridShow(True, True)
      EgtSetGridFrame(Frame3d.GLOB)
      EgtSetGridGeo(10, 1, 10, 50)
      EgtSetGridColor(New Color3d(160, 160, 160), New Color3d(160, 160, 160))
      ' modo di visualizzazione
      Dim nShowMode As Integer = GetPrivateProfileInt("Scene", "ShowMode", SM.SHADING, m_sIniFile)
      If nShowMode = SM.WIREFRAME Then
         rbtWireFrame.Checked = True
      ElseIf nShowMode = SM.HIDDENLINE Then
         rbtHiddenLine.Checked = True
      Else
         rbtShading.Checked = True
      End If
      ' visualizzazione direzione curve
      Dim nShowCurveDir As Integer = GetPrivateProfileInt("Scene", "CurveDir", 0, m_sIniFile)
      chkCurveDir.Checked = (nShowCurveDir <> 0)
      ' ObjTree non selezionato
      m_nObjTreeOldId = GDB_ID.NULL
      ' aggiungo voce per about box nel menù di sistema
      Dim hSysMenu As IntPtr = GetSystemMenu(Handle, False)
      If hSysMenu <> IntPtr.Zero Then
         AppendMenu(hSysMenu, MF_SEPARATOR, 0, "")
         AppendMenu(hSysMenu, MF_STRING, IDM_ABOUTBOX, "About TestEIn...")
      End If
      'Posizione e dimensioni del Form
      If ModifierKeys <> Keys.Shift Then
         Dim nFlag As Integer
         Dim nLeft As Integer
         Dim nTop As Integer
         Dim nWidth As Integer
         Dim nHeight As Integer
         GetPrivateProfileWinPos("General", "WinPlace", nFlag, nLeft, nTop, nWidth, nHeight, m_sIniFile)
         Me.StartPosition = System.Windows.Forms.FormStartPosition.Manual
         Me.Location = New Point(nLeft, nTop)
         Me.Size = New Size(nWidth, nHeight)
         WindowState = IIf(nFlag = 1, FormWindowState.Maximized, FormWindowState.Normal)
      End If
      ' Recupero eventuali parametri da linea di comando
      Dim bOpen As Boolean = False
      For Each s As String In My.Application.CommandLineArgs
         If Not String.IsNullOrWhiteSpace(s) Then
            Dim nFileType As Integer = EgtGetFileType(s)
            Select Case nFileType
            Case FT.NGE, FT.NFE
               Scene1.OpenProject(s, False)
               bOpen = True
            Case FT.DXF, FT.STL, FT.CNC
               Scene1.ImportProject(s, False)
               bOpen = True
            Case FT.TSC, FT.LUA
               Scene1.Exec(s, False)
               bOpen = True
            End Select
            Exit For
         End If
      Next
      If Not bOpen Then
         Scene1.NewProject()
      End If
   End Sub

   Private Sub Form1_FormClosing(sender As System.Object, e As FormClosingEventArgs) Handles MyBase.FormClosing
      ' gestisco eventuale file corrente modificato
      If Not ManageModified() Then
         e.Cancel = True
         Return
      End If
      ' Salvo modo di visualizzazione
      WritePrivateProfileString("Scene", "ShowMode", EgtGetShowMode(), m_sIniFile)
      ' Salvo stato visualizzazione direzione curve
      WritePrivateProfileString("Scene", "CurveDir", IIf(EgtGetShowCurveDirection(), 1, 0), m_sIniFile)
      ' Salvo posizione Form
      Dim nFlag As Integer = IIf(Me.WindowState = FormWindowState.Maximized, 1, 0)
      WritePrivateProfileWinPos("General", "WinPlace", nFlag, Me.Left, Me.Top, Me.Width, Me.Height, m_sIniFile)
      ' Terminazione generale di EgtInterface
      EgtExit()
   End Sub

   Protected Overrides Sub WndProc(ByRef m As System.Windows.Forms.Message)
      MyBase.WndProc(m)
      If m.Msg = WM_SYSCOMMAND Then
         If m.WParam.ToInt32 = IDM_ABOUTBOX Then
            AboutBox1.ShowDialog()
         End If
      End If
   End Sub

 '-------------------------------- Events management ----------------------------------------------
   Private Sub OnCursorPos(ByVal sender As Object, ByVal sCursorPos As String) Handles Scene1.OnCursorPos
      ToolStripStatusCursorPos.Text = sCursorPos
   End Sub

   Private Sub OnMouseSelected(ByVal sender As Object, ByVal nId As Integer, ByVal bLast As Boolean) Handles Scene1.OnMouseSelected
      If EgtIsSelectedObj(nId) Then
         EgtDeselectObj(nId)
      Else
         EgtSelectObj(nId)
      End If
      If bLast Then
         EgtDraw()
      End If
   End Sub

   Private Sub OnMouseAnalyzed(ByVal sender As Object, ByVal nId As Integer) Handles Scene1.OnMouseAnalyzed
      SelectIdInObjTree(nId)
   End Sub

   Private Sub OnShowDistance(ByVal sender As Object, ByVal sDistance As String) Handles Scene1.OnShowDistance
      ToolStripStatusOutput.Text = sDistance
   End Sub

   Private Sub OnNewProject(ByVal sender As Object) Handles Scene1.OnNewProject
      m_sCurrFile = String.Empty
      ResetModified()
      EmitTitle()
      ResetCurrPartLayer()
      LoadObjTree()
   End Sub

   Private Sub OnOpeningProject(ByVal sender As Object) Handles Scene1.OnOpeningProject
      ClearObjTree()
   End Sub

   Private Sub OnOpenProject(ByVal sender As Object, ByVal sFile As String) Handles Scene1.OnOpenProject
      m_sCurrFile = sFile
      ResetModified()
      EmitTitle()
      WritePrivateProfileString("General", "LastNgeDir", Path.GetDirectoryName(m_sCurrFile), m_sIniFile)
      ResetCurrPartLayer()
      LoadObjTree()
   End Sub

   Private Sub OnSavingProject(ByVal sender As Object, ByVal sFile As String) Handles Scene1.OnSavingProject
      m_sCurrFile = sFile
      EmitTitle()
      WritePrivateProfileString("General", "LastNgeDir", Path.GetDirectoryName(m_sCurrFile), m_sIniFile)
      ' ripristino stato eventuale oggetto marcato
      m_nMarkObj = RevertOldIdInObjTree()
   End Sub

   Private Sub OnSavedProject(ByVal sender As Object) Handles Scene1.OnSavedProject
      ResetModified()
      ' rimarco eventuale oggetto smarcato
      SelectIdInObjTree(m_nMarkObj)
   End Sub

   Private Sub OnImportingProject(ByVal sender As Object) Handles Scene1.OnImportingProject
      ClearObjTree()
   End Sub

   Private Sub OnImportedProject(ByVal sender As Object, ByVal sFile As String) Handles Scene1.OnImportedProject
      WritePrivateProfileString("General", "LastImpDir", Path.GetDirectoryName(sFile), m_sIniFile)
      m_sCurrFile = sFile
      SetModified()
      EmitTitle()
      ResetCurrPartLayer()
      LoadObjTree()
   End Sub

   Private Sub OnExportingProject(ByVal sender As Object, ByVal sFile As String) Handles Scene1.OnExportingProject
      WritePrivateProfileString("General", "LastExpDir", Path.GetDirectoryName(sFile), m_sIniFile)
      ' ripristino stato eventuale oggetto marcato
      m_nMarkObj = RevertOldIdInObjTree()
   End Sub

   Private Sub OnExportedProject(ByVal sender As Object) Handles Scene1.OnExportedProject
      ' rimarco eventuale oggetto smarcato
      SelectIdInObjTree(m_nMarkObj)
   End Sub

   Private Sub OnExecutingScript(ByVal sender As Object, ByVal sFile As String) Handles Scene1.OnExecutingScript
      WritePrivateProfileString("General", "LastLuaDir", Path.GetDirectoryName(sFile), m_sIniFile)
      ClearObjTree()
   End Sub

   Private Sub OnExecutedScript(ByVal sender As Object) Handles Scene1.OnExecutedScript
      SetModified()
      LoadObjTree()
   End Sub

 '-------------------------------- Buttons --------------------------------------------------------
   Private Sub btnNew_Click(sender As System.Object, e As System.EventArgs) Handles btnNew.Click
      ' gestisco eventuale file corrente modificato
      If Not ManageModified() Then
         Return
      End If
      ' eseguo
      Scene1.NewProject()
   End Sub

   Private Sub btnOpen_Click(sender As System.Object, e As System.EventArgs) Handles btnOpen.Click
      ' gestisco eventuale file corrente modificato
      If Not ManageModified() Then
         Return
      End If
      ' eseguo
      Dim sDir As String = String.Empty
      GetPrivateProfileString("General", "LastNgeDir", "", sDir, m_sIniFile)
      Scene1.OpenProject(sDir)
   End Sub

   Private Sub btnSave_Click(sender As System.Object, e As System.EventArgs) Handles btnSave.Click
      Scene1.SaveProject(m_sCurrFile)
   End Sub

   Private Sub btnSaveAs_Click(sender As System.Object, e As System.EventArgs) Handles btnSaveAs.Click
      Scene1.SaveAsProject(m_sCurrFile)
   End Sub

   Private Sub btnImport_Click(sender As System.Object, e As System.EventArgs) Handles btnImport.Click
      ' gestisco eventuale file corrente modificato
      If Not ManageModified() Then
         Return
      End If
      ' eseguo
      Dim sDir As String = String.Empty
      GetPrivateProfileString("General", "LastImpDir", "", sDir, m_sIniFile)
      Scene1.ImportProject(sDir)
   End Sub

   Private Sub btnExport_Click(sender As System.Object, e As System.EventArgs) Handles btnExport.Click
      Scene1.ExportProject(Path.ChangeExtension(m_sCurrFile, "dxf"))
   End Sub

   Private Sub btnExec_Click(sender As System.Object, e As System.EventArgs) Handles btnExec.Click
      Dim sDir As String = String.Empty
      GetPrivateProfileString("General", "LastLuaDir", "", sDir, m_sIniFile)
      Scene1.Exec(sDir)
   End Sub

   Private Sub rbtWireFrame_CheckedChanged(sender As System.Object, e As System.EventArgs) Handles rbtWireFrame.CheckedChanged
      Scene1.WireFrame()
   End Sub

   Private Sub rbtHiddenLine_CheckedChanged(sender As System.Object, e As System.EventArgs) Handles rbtHiddenLine.CheckedChanged
      Scene1.HiddenLine()
   End Sub

   Private Sub rbtShading_CheckedChanged(sender As System.Object, e As System.EventArgs) Handles rbtShading.CheckedChanged
      Scene1.Shading()
   End Sub

   Private Sub chkCurveDir_CheckedChanged(sender As System.Object, e As System.EventArgs) Handles chkCurveDir.CheckedChanged
      EgtSetShowCurveDirection(chkCurveDir.Checked)
   End Sub

   Private Sub chkAnalyze_CheckedChanged(sender As System.Object, e As System.EventArgs) Handles chkAnalyze.CheckedChanged
      If chkAnalyze.Checked Then
         chkGetDist.Checked = False
         Scene1.SetStatusAnalyze()
      Else
         Scene1.ResetStatusAnalyze()
         SelectIdInObjTree(GDB_ID.NULL)
      End If
   End Sub

   Private Sub chkGetDist_CheckedChanged(sender As System.Object, e As System.EventArgs) Handles chkGetDist.CheckedChanged
      If chkGetDist.Checked Then
         chkAnalyze.Checked = False
         Scene1.SetStatusGetDistance()
         ToolStripStatusOutput.Text = "  "
      Else
         Scene1.ResetStatusGetDistance()
         ToolStripStatusOutput.Text = "  "
      End If
   End Sub

   Private Sub btnZoomAll_Click(sender As System.Object, e As System.EventArgs) Handles btnZoomAll.Click
      Scene1.ZoomAll()
   End Sub

   Private Sub btnZoomIn_Click(sender As System.Object, e As System.EventArgs) Handles btnZoomIn.Click
      Scene1.ZoomIn()
   End Sub

   Private Sub btnZoomOut_Click(sender As System.Object, e As System.EventArgs) Handles btnZoomOut.Click
      Scene1.ZoomOut()
   End Sub

   Private Sub btnTop_Click(sender As System.Object, e As System.EventArgs) Handles btnTop.Click
      Scene1.TopView()
   End Sub

   Private Sub btnFront_Click(sender As System.Object, e As System.EventArgs) Handles btnFront.Click
      Scene1.FrontView()
   End Sub

   Private Sub btnLeft_Click(sender As System.Object, e As System.EventArgs) Handles btnLeft.Click
      Scene1.LeftView()
   End Sub

   Private Sub btnBack_Click(sender As System.Object, e As System.EventArgs) Handles btnBack.Click
      Scene1.BackView()
   End Sub

   Private Sub btnRight_Click(sender As System.Object, e As System.EventArgs) Handles btnRight.Click
      Scene1.RightView()
   End Sub

   Private Sub btnIsoSW_Click(sender As System.Object, e As System.EventArgs) Handles btnIsoSW.Click
      Scene1.IsoViewSW()
   End Sub

   Private Sub btnIsoSE_Click(sender As System.Object, e As System.EventArgs) Handles btnIsoSE.Click
      Scene1.IsoViewSE()
   End Sub

   Private Sub btnIsoNE_Click(sender As System.Object, e As System.EventArgs) Handles btnIsoNE.Click
      Scene1.IsoViewNE()
   End Sub

   Private Sub btnIsoNW_Click(sender As System.Object, e As System.EventArgs) Handles btnIsoNW.Click
      Scene1.IsoViewNW()
   End Sub

   ' ----------------- Test -------------------
   Private Sub XbtnRotP90_Click(sender As System.Object, e As System.EventArgs) Handles XbtnRotP90.Click
      XRotate(90)
      ' aggiorno visualizzazione
      Scene1.ZoomAll()
      UpdateObjInObjTree(m_nObjTreeOldId)
   End Sub

   Private Sub XbtnRotM90_Click(sender As System.Object, e As System.EventArgs) Handles XbtnRotM90.Click
      XRotate(-90)
      ' aggiorno visualizzazione
      Scene1.ZoomAll()
      UpdateObjInObjTree(m_nObjTreeOldId)
   End Sub

   Private Sub XRotate(ByVal dAngRotDeg As Double)
      ' indice del primo gruppo sotto la radice
      Dim nId As Integer = EgtGetFirstInGroup(GDB_ID.ROOT)
      ' recupero il box del gruppo in globale
      Dim PtMinPre As New Point3d
      Dim PtMaxPre As New Point3d
      EgtGetBBoxGlob(nId, BBF.IGNORE_TEXT + BBF.EXACT, PtMinPre, PtMaxPre)
      ' ruoto attorno al punto minimo
      EgtRotateGlob(nId, PtMinPre, EgtGetGridVersZ(), dAngRotDeg)
      ' calcolo nuovo box in globale
      Dim PtMinPost As New Point3d
      Dim PtMaxPost As New Point3d
      EgtGetBBoxGlob(nId, BBF.IGNORE_TEXT + BBF.EXACT, PtMinPost, PtMaxPost)
      ' eseguo traslazione per riavere lo stesso punto minimo
      Dim VtMove As Vector3d = PtMinPre - PtMinPost
      EgtMoveGlob(nId, VtMove)
   End Sub

   Private Sub XbtnMirror_Click(sender As System.Object, e As System.EventArgs) Handles XbtnMirror.Click
      ' indice del primo gruppo sotto la radice
      Dim nId As Integer = EgtGetFirstInGroup(GDB_ID.ROOT)
      ' recupero il box del gruppo in globale
      Dim PtMin As New Point3d
      Dim PtMax As New Point3d
      EgtGetBBoxGlob(nId, BBF.IGNORE_TEXT + BBF.EXACT, PtMin, PtMax)
      Dim PtCen As Point3d = Point3d.Media(PtMin, PtMax)
      ' mirror rispetto a Y centrato nel box
      EgtMirrorGlob(nId, PtCen, Vector3d.X_AX)
      ' sistemo gli eventuali testi
      XUnMirrorTexts(nId)
      ' aggiorno visualizzazione
      Scene1.ZoomAll()
      UpdateObjInObjTree(m_nObjTreeOldId)
   End Sub

   Private Sub XUnMirrorTexts(ByVal nGroupId As Integer)
      Dim nId As Integer = EgtGetFirstInGroup(nGroupId)
      While nId <> GDB_ID.NULL
         'recupero il tipo di oggetto
         Dim nType As Integer = EgtGetType(nId)
         'se gruppo
         If nType = TY.GROUP Then
            XUnMirrorTexts(nId)
         ' se testo
         ElseIf nType = TY.EXT_TEXT Then
            EgtMirrorText(nId, True)
         End If
         ' passo al successivo
         nId = EgtGetNext(nId)
      End While
   End Sub

   ' --------------------- Update UI -------------------------------
   Private Sub Application_Idle(ByVal sender As Object, ByVal e As EventArgs)
      Dim bLayerOk As Boolean = (GetCurrLayer() <> GDB_ID.NULL)
      Dim bSelOk As Boolean = (EgtGetFirstSelectedObj() <> GDB_ID.NULL)
      ' Draw
      btnPoint.Enabled = bLayerOk
      btnLine2P.Enabled = bLayerOk
      btnArcCSE.Enabled = bLayerOk
      btnArc3P.Enabled = bLayerOk
      ' Construct
      btnPlane.Enabled = bLayerOk And bSelOk
      ' Edit
      btnDelete.Enabled = bSelOk
      btnInvertCurve.Enabled = bSelOk
      ' Transform
      btnCopy.Enabled = bSelOk
      btnMove.Enabled = bSelOk
      btnRotate.Enabled = bSelOk
      btnMirror.Enabled = bSelOk

   End Sub

   ' --------------------- Commands --------------------------------
   Private Enum EST As Integer
      NULL = 0
      POINT
      LINE2P_1
      LINE2P_2
      ARCCSE_1
      ARCCSE_2
      ARCCSE_3
      ARC3P_1
      ARC3P_2
      ARC3P_3
      MOVE_1
      MOVE_2
      COPY_1
      COPY_2
      ROTATE_1
      ROTATE_2
      ROTATE_3
      MIRROR_1
      MIRROR_2
   End Enum
   Private m_nStatus As EST = EST.NULL
   Private m_ptP1 As Point3d
   Private m_ptP2 As Point3d

   Private Sub btnPoint_Click(sender As System.Object, e As System.EventArgs) Handles btnPoint.Click
      ' posso partire solo da stato libero
      If m_nStatus <> EST.NULL Then
         Return
      End If
      ' posso partire solo se esiste un gruppo corrente
      If GetCurrLayer() = GDB_ID.NULL Then
         Return
      End If
      ' non serve il gruppo di drag
      ' imposto stato di scena a selezione punto
      Scene1.SetStatusSelPoint()
      ' imposto stato a primo punto per point
      m_nStatus = EST.POINT
      ToolStripStatusOutput.Text = "Point : select Point"
   End Sub

   Private Sub btnLine2P_Click(sender As System.Object, e As System.EventArgs) Handles btnLine2P.Click
      ' posso partire solo da stato libero
      If m_nStatus <> EST.NULL Then
         Return
      End If
      ' posso partire solo se esiste un gruppo corrente
      If GetCurrLayer() = GDB_ID.NULL Then
         Return
      End If
      ' creo il gruppo di drag
      If Not Scene1.CreateDragGroup() Then
         Return
      End If
      ' imposto stato di scena a selezione punto
      Scene1.SetStatusSelPoint()
      ' imposto stato a primo punto per Line2P
      m_nStatus = EST.LINE2P_1
      ToolStripStatusOutput.Text = "Line : select Start Point"
   End Sub

   Private Sub btnArcCSE_Click(sender As System.Object, e As System.EventArgs) Handles btnArcCSE.Click
      ' posso partire solo da stato libero
      If m_nStatus <> EST.NULL Then
         Return
      End If
      ' posso partire solo se esiste un gruppo corrente
      If GetCurrLayer() = GDB_ID.NULL Then
         Return
      End If
      ' creo il gruppo di drag
      If Not Scene1.CreateDragGroup() Then
         Return
      End If
      ' imposto stato di scena a selezione punto
      Scene1.SetStatusSelPoint()
      ' imposto stato a primo punto per ArcCSE
      m_nStatus = EST.ARCCSE_1
      ToolStripStatusOutput.Text = "Arc : select Center"
   End Sub

   Private Sub btnArc3P_Click(sender As System.Object, e As System.EventArgs) Handles btnArc3P.Click
      ' posso partire solo da stato libero
      If m_nStatus <> EST.NULL Then
         Return
      End If
      ' posso partire solo se esiste un gruppo corrente
      If GetCurrLayer() = GDB_ID.NULL Then
         Return
      End If
      ' creo il gruppo di drag
      If Not Scene1.CreateDragGroup() Then
         Return
      End If
      ' imposto stato di scena a selezione punto
      Scene1.SetStatusSelPoint()
      ' imposto stato a primo punto per Arc3P
      m_nStatus = EST.ARC3P_1
      ToolStripStatusOutput.Text = "Arc : select Start Point"
   End Sub

   Private Sub btnPlane_Click(sender As System.Object, e As System.EventArgs) Handles btnPlane.Click
      ' posso partire solo da stato libero
      If m_nStatus <> EST.NULL Then
         Return
      End If
      ' posso partire solo se esiste un gruppo corrente
      If GetCurrLayer() = GDB_ID.NULL Then
         Return
      End If
      ' creo la superficie
      EgtCreateSurfTriMeshByContour(GetCurrLayer(), EgtGetFirstSelectedObj(), 10 * EPS_SMALL)
      EgtDeselectAll()
      ' reset stato scena
      Scene1.ResetStatus()
      ' reset stato
      m_nStatus = EST.NULL
      ToolStripStatusOutput.Text = ""
      SetModified()
      LoadObjTree()
   End Sub

   Private Sub btnDelete_Click(sender As System.Object, e As System.EventArgs) Handles btnDelete.Click
      ' posso partire solo da stato libero
      If m_nStatus <> EST.NULL Then
         Return
      End If
      ' lancio la cancellazione
      EgtErase(GDB_ID.SEL)
      ' reset stato scena
      Scene1.ResetStatus()
      ' reset stato
      m_nStatus = EST.NULL
      ToolStripStatusOutput.Text = ""
      SetModified()
      LoadObjTree()
   End Sub

   Private Sub btnInvertCurve_Click(sender As System.Object, e As System.EventArgs) Handles btnInvertCurve.Click
      ' posso partire solo da stato libero
      If m_nStatus <> EST.NULL Then
         Return
      End If
      ' lancio l'inversione della curva
      EgtInvertCurve(EgtGetFirstSelectedObj())
      EgtDeselectAll()
      ' reset stato scena
      Scene1.ResetStatus()
      ' reset stato
      m_nStatus = EST.NULL
      ToolStripStatusOutput.Text = ""
      SetModified()
      LoadObjTree()
   End Sub

   Private Sub btnMove_Click(sender As System.Object, e As System.EventArgs) Handles btnMove.Click
      ' verifico condizioni e preparo per il drag
      If Not PrepareTransform() Then
         Return
      End If
      ' imposto stato di scena a selezione punto
      Scene1.SetStatusSelPoint()
      ' imposto stato a primo punto per Move
      m_nStatus = EST.MOVE_1
      ToolStripStatusOutput.Text = "Move : select Base Point"
   End Sub

   Private Sub btnCopy_Click(sender As System.Object, e As System.EventArgs) Handles btnCopy.Click
      ' verifico condizioni e preparo per il drag
      If Not PrepareTransform() Then
         Return
      End If
      ' imposto stato di scena a selezione punto
      Scene1.SetStatusSelPoint()
      ' imposto stato a primo punto per Move
      m_nStatus = EST.COPY_1
      ToolStripStatusOutput.Text = "Copy : select Base Point"
   End Sub

   Private Sub btnRotate_Click(sender As System.Object, e As System.EventArgs) Handles btnRotate.Click
      ' verifico condizioni e preparo per il drag
      If Not PrepareTransform() Then
         Return
      End If
      ' imposto stato di scena a selezione punto
      Scene1.SetStatusSelPoint()
      ' imposto stato a primo punto per Rotate
      m_nStatus = EST.ROTATE_1
      ToolStripStatusOutput.Text = "Rotate : select Center"
   End Sub

   Private Sub btnMirror_Click(sender As System.Object, e As System.EventArgs) Handles btnMirror.Click
      ' verifico condizioni e preparo per il drag
      If Not PrepareTransform() Then
         Return
      End If
      ' imposto stato di scena a selezione punto
      Scene1.SetStatusSelPoint()
      ' imposto stato a primo punto per Mirror
      m_nStatus = EST.MIRROR_1
      ToolStripStatusOutput.Text = "Rotate : select Start Point"
   End Sub

   Private Function PrepareTransform() As Boolean
      ' posso partire solo da stato libero
      If m_nStatus <> EST.NULL Then
         Return False
      End If
      ' verifico ci sia qualcosa di selezionato
      If EgtGetFirstSelectedObj() = GDB_ID.NULL Then
         Return False
      End If
      ' creo il gruppo di drag e vi copio le entità selezionate
      If Not Scene1.CreateDragGroup() Then
         Return False
      End If
      Dim nId As Integer = EgtGetFirstSelectedObj()
      While nId <> GDB_ID.NULL
         If Not Scene1.AddToDragGroup(nId) Then
            Scene1.EraseDragGroup()
            Return False
         End If
         nId = EgtGetNextSelectedObj()
      End While
      Return True
   End Function

   Private Sub OnMouseSelectedPoint(ByVal sender As Object, ByVal PtP As Point3d) Handles Scene1.OnMouseSelectedPoint
      ' Point
      If m_nStatus = EST.POINT Then
         ' creo il punto (i dati sono in globale)
         EgtCreateGeoPoint(GetCurrLayer(), PtP.Loc(GetCurrLayer()))
         ' reset stato scena
         Scene1.ResetStatus()
         ' aggiorno stato
         m_nStatus = EST.NULL
         ToolStripStatusOutput.Text = ""
         SetModified()
         LoadObjTree()
      ' Line2P
      ElseIf m_nStatus = EST.LINE2P_1 Then
         m_ptP1 = PtP
         m_nStatus = EST.LINE2P_2
         ToolStripStatusOutput.Text = "Line : select End Point"
      ElseIf m_nStatus = EST.LINE2P_2 Then
         ' reset scena
         Scene1.ResetStatus(False)
         ' creo la linea (i punti sono in globale)
         EgtCreateCurveLine(GetCurrLayer(), m_ptP1.Loc(GetCurrLayer()), PtP.Loc(GetCurrLayer()))
         EgtDraw()
         ' aggiorno stato
         m_nStatus = EST.NULL
         ToolStripStatusOutput.Text = ""
         SetModified()
         LoadObjTree()
      ' Arc3P
      ElseIf m_nStatus = EST.ARC3P_1 Then
         m_ptP1 = PtP
         m_nStatus = EST.ARC3P_2
         ToolStripStatusOutput.Text = "Arc : select End Point"
      ElseIf m_nStatus = EST.ARC3P_2 Then
         m_ptP2 = PtP
         m_nStatus = EST.ARC3P_3
         ToolStripStatusOutput.Text = "Arc : select Mid Point"
      ElseIf m_nStatus = EST.ARC3P_3 Then
         ' reset scena
         Scene1.ResetStatus()
         ' creo l'arco (i punti sono in globale)
         EgtCreateCurveArc3P(GetCurrLayer(), m_ptP1.Loc(GetCurrLayer()), PtP.Loc(GetCurrLayer()), m_ptP2.Loc(GetCurrLayer()))
         EgtDraw()
         ' aggiorno stato
         m_nStatus = EST.NULL
         ToolStripStatusOutput.Text = ""
         SetModified()
         LoadObjTree()
      ' ArcCSE
      ElseIf m_nStatus = EST.ARCCSE_1 Then
         m_ptP1 = PtP
         m_nStatus = EST.ARCCSE_2
         ToolStripStatusOutput.Text = "Arc : select Start Point"
      ElseIf m_nStatus = EST.ARCCSE_2 Then
         m_ptP2 = PtP
         m_nStatus = EST.ARCCSE_3
         ToolStripStatusOutput.Text = "Arc : select End (near) Point"
      ElseIf m_nStatus = EST.ARCCSE_3 Then
         ' reset scena
         Scene1.ResetStatus()
         ' creo l'arco (i punti sono in globale)
         EgtCreateCurveArcC2PN(GetCurrLayer(), m_ptP1.Loc(GetCurrLayer()), m_ptP2.Loc(GetCurrLayer()), PtP.Loc(GetCurrLayer()), EgtGetGridVersZ())
         EgtDraw()
         ' aggiorno stato
         m_nStatus = EST.NULL
         ToolStripStatusOutput.Text = ""
         SetModified()
         LoadObjTree()
      ' Move
      ElseIf m_nStatus = EST.MOVE_1 Then
         m_ptP1 = PtP
         m_nStatus = EST.MOVE_2
         ToolStripStatusOutput.Text = "Move : select Target Point"
      ElseIf m_nStatus = EST.MOVE_2 Then
         ' eseguo movimento
         EgtMoveGlob(GDB_ID.SEL, (PtP - m_ptP1))
         EgtDeselectAll()
         ' reset stato scena
         Scene1.ResetStatus()
         ' aggiorno stato
         m_nStatus = EST.NULL
         ToolStripStatusOutput.Text = ""
         SetModified()
         LoadObjTree()
      ' Copy
      ElseIf m_nStatus = EST.COPY_1 Then
         m_ptP1 = PtP
         m_nStatus = EST.COPY_2
         ToolStripStatusOutput.Text = "Copy : select Target Point"
      ElseIf m_nStatus = EST.COPY_2 Then
         ' reset scena
         Scene1.ResetStatus()
         ' eseguo copia e movimento
         Dim nId As Integer = EgtGetFirstSelectedObj()
         While nId <> GDB_ID.NULL
            Dim nCopyId As Integer = EgtCopyGlob(nId, GetCurrLayer())
            EgtMoveGlob(nCopyId, (PtP - m_ptP1))
            nId = EgtGetNextSelectedObj()
         End While
         EgtDeselectAll()
         EgtDraw()
         ' aggiorno stato
         m_nStatus = EST.NULL
         ToolStripStatusOutput.Text = ""
         SetModified()
         LoadObjTree()
      ' Rotate
      ElseIf m_nStatus = EST.ROTATE_1 Then
         m_ptP1 = PtP
         m_nStatus = EST.ROTATE_2
         ToolStripStatusOutput.Text = "Rotate : select Base Point"
      ElseIf m_nStatus = EST.ROTATE_2 Then
         m_ptP2 = PtP
         m_nStatus = EST.ROTATE_3
         ToolStripStatusOutput.Text = "Rotate : select Rotation Point"
      ElseIf m_nStatus = EST.ROTATE_3 Then
         ' eseguo rotazione
         Dim dAngRotDeg As Double = 0
         Dim bDet As Boolean = True
         EgtGetVectorRotation((m_ptP2 - m_ptP1), (PtP - m_ptP1), EgtGetGridVersZ(), dAngRotDeg, bDet)
         EgtRotateGlob(GDB_ID.SEL, m_ptP1, EgtGetGridVersZ(), dAngRotDeg)
         EgtDeselectAll()
         ' reset stato scena
         Scene1.ResetStatus()
         ' aggiorno stato
         m_nStatus = EST.NULL
         ToolStripStatusOutput.Text = ""
         SetModified()
         LoadObjTree()
      ' Mirror
      ElseIf m_nStatus = EST.MIRROR_1 Then
         m_ptP1 = PtP
         m_ptP2 = m_ptP1
         m_nStatus = EST.MIRROR_2
         ToolStripStatusOutput.Text = "Mirror : select End Point"
      ElseIf m_nStatus = EST.MIRROR_2 Then
         ' eseguo mirror
         Dim VtNorm As Vector3d = (PtP - m_ptP1) ^ EgtGetGridVersZ()
         If VtNorm.Len > EPS_SMALL Then
            EgtMirrorGlob(GDB_ID.SEL, m_ptP1, VtNorm)
         End If
         EgtDeselectAll()
         ' reset stato scena
         Scene1.ResetStatus()
         ' aggiorno stato
         m_nStatus = EST.NULL
         ToolStripStatusOutput.Text = ""
         SetModified()
         LoadObjTree()
      End If
   End Sub

   Private Sub OnMouseMoveSelPoint(ByVal sender As Object, ByVal PtP As Point3d) Handles Scene1.OnMouseMoveSelPoint
      If m_nStatus = EST.LINE2P_2 Then
         ' durante la creazione di oggetti il gruppo di Drag ha riferimento globale 
         Dim nId As Integer = EgtGetFirstInGroup(Scene1.GetDragGroup())
         If nId = GDB_ID.NULL Then
            EgtCreateCurveLine(Scene1.GetDragGroup(), m_ptP1, PtP)
         Else
            EgtModifyCurveEndPoint(nId, PtP)
         End If
         EgtDraw()
      ElseIf m_nStatus = EST.ARC3P_2 Or m_nStatus = EST.ARCCSE_2 Then
         ' durante la creazione di oggetti il gruppo di Drag ha riferimento globale 
         Dim nId As Integer = EgtGetFirstInGroup(Scene1.GetDragGroup())
         If nId = GDB_ID.NULL Then
            EgtCreateCurveLine(Scene1.GetDragGroup(), m_ptP1, PtP)
         Else
            EgtModifyCurveEndPoint(nId, PtP)
         End If
         EgtDraw()
      ElseIf m_nStatus = EST.ARC3P_3 Then
         ' durante la creazione di oggetti il gruppo di Drag ha riferimento globale 
         Dim nId As Integer = EgtGetFirstInGroup(Scene1.GetDragGroup())
         If EgtGetType(nId) <> TY.CRV_ARC Then
            EgtErase(nId)
            nId = GDB_ID.NULL
         End If
         If nId = GDB_ID.NULL Then
            EgtCreateCurveArc3P(Scene1.GetDragGroup(), m_ptP1, PtP, m_ptP2)
         Else
            EgtModifyCurveArc3P(nId, PtP)
         End If
         EgtDraw()
      ElseIf m_nStatus = EST.ARCCSE_3 Then
         ' durante la creazione di oggetti il gruppo di Drag ha riferimento globale 
         Dim nId As Integer = EgtGetFirstInGroup(Scene1.GetDragGroup())
         If EgtGetType(nId) <> TY.CRV_ARC Then
            EgtErase(nId)
            nId = GDB_ID.NULL
         End If
         If nId = GDB_ID.NULL Then
            Dim vtN As New Vector3d(0, 0, 1)
            EgtCreateCurveArcC2PN(Scene1.GetDragGroup(), m_ptP1, m_ptP2, PtP, vtN.Glob(GetCurrLayer()))
         Else
            EgtModifyCurveArcC2PN(nId, PtP)
         End If
         EgtDraw()
      ElseIf m_nStatus = EST.MOVE_2 Then
         ' ripristino lo stato iniziale
         EgtChangeGroupFrame(Scene1.GetDragGroup(), Frame3d.GLOB)
         ' eseguo tutto il movimento
         EgtMoveGlob(Scene1.GetDragGroup(), (PtP - m_ptP1))
         EgtSetGeoLine(m_ptP1, PtP)
         EgtDraw()
      ElseIf m_nStatus = EST.COPY_2 Then
         ' ripristino lo stato iniziale
         EgtChangeGroupFrame(Scene1.GetDragGroup(), Frame3d.GLOB)
         ' eseguo tutto il movimento
         EgtMoveGlob(Scene1.GetDragGroup(), (PtP - m_ptP1))
         EgtSetGeoLine(m_ptP1, PtP)
         EgtDraw()
      ElseIf m_nStatus = EST.ROTATE_3 Then
         ' ripristino lo stato iniziale
         EgtChangeGroupFrame(Scene1.GetDragGroup(), Frame3d.GLOB)
         ' eseguo rotazione
         Dim dAngRotDeg As Double = 0
         Dim bDet As Boolean = True
         EgtGetVectorRotation((m_ptP2 - m_ptP1), (PtP - m_ptP1), EgtGetGridVersZ(), dAngRotDeg, bDet)
         EgtRotateGlob(Scene1.GetDragGroup(), m_ptP1, EgtGetGridVersZ(), dAngRotDeg)
         EgtDraw()
      ElseIf m_nStatus = EST.MIRROR_2 Then
         ' ripristino lo stato iniziale, tramite annullo mirror precedente
         Dim VtNorm As Vector3d = (m_ptP2 - m_ptP1) ^ EgtGetGridVersZ()
         If VtNorm.Len > EPS_SMALL Then
            EgtMirrorGlob(Scene1.GetDragGroup(), m_ptP1, VtNorm)
         End If
         ' eseguo mirror
         VtNorm = (PtP - m_ptP1) ^ EgtGetGridVersZ()
         If VtNorm.Len > EPS_SMALL Then
            EgtMirrorGlob(Scene1.GetDragGroup(), m_ptP1, VtNorm)
         End If
         ' salvo il punto
         m_ptP2 = PtP
         EgtDraw()
      End If
   End Sub


  '-------------------------------- KeyDown --------------------------------------------------------
   Private Sub Form1_KeyDown(ByVal sender As System.Object, ByVal e As KeyEventArgs) Handles MyBase.KeyDown
      ' Con ESC esco dall'azione corrente
      If e.KeyData = Keys.Escape Then
         ' reset Azione corrente
         m_nStatus = EST.NULL
         Scene1.ResetStatus()
         ' reset Analisi e Distanza
         chkAnalyze.Checked = False
         chkGetDist.Checked = False
         ' pulisco output
         ToolStripStatusOutput.Text = ""
      End If
   End Sub

   Private Sub Scene1_KeyDown(ByVal sender As System.Object, ByVal e As KeyEventArgs) Handles Scene1.KeyDown
      ' Con DEL eseguo cancellazione delle entità selezionate
      If e.KeyData = Keys.Delete Then
         ' posso partire solo da stato libero
         If m_nStatus <> EST.NULL Then
            Return
         End If
         ' lancio la cancellazione
         If EgtGetFirstSelectedObj() <> GDB_ID.NULL Then
            EgtErase(GDB_ID.SEL)
            SetModified()
            ' reset stato scena
            Scene1.ResetStatus()
            ' reset stato
            m_nStatus = EST.NULL
            ToolStripStatusOutput.Text = ""
         End If
      End If
   End Sub

  '-------------------------------- Command Box ----------------------------------------------------
   Private Sub tboxCmd_KeyDown(sender As System.Object, e As System.Windows.Forms.KeyEventArgs) Handles tboxCmd.KeyDown
      If (e.KeyCode = Keys.Enter) Then
         Dim nLine As Integer = tboxCmd.GetLineFromCharIndex(tboxCmd.GetFirstCharIndexOfCurrentLine)
         Dim sCmd As String = tboxCmd.Lines(nLine).ToString
         If Not String.IsNullOrEmpty(sCmd) Then
            ' ripristino stato oggetto marcato
            Dim nIdOld As Integer = RevertOldIdInObjTree()
            ' eseguo comando
            If EgtTscExecLine(sCmd) Then
               Scene1.Invalidate()
               ToolStripStatusOnR.Text = "   "
            Else
               ToolStripStatusOnR.Text = "Error executing command"
            End If
            ' ricarico albero degli oggetti
            LoadObjTree()
            SelectIdInObjTree(nIdOld)
         End If
      End If
   End Sub

 '-------------------------------- Current Piece/Layer --------------------------------------------
   Private m_nCurrPart = GDB_ID.NULL
   Private m_nCurrLayer = GDB_ID.NULL

   Private Sub btnNewPart_Click(sender As System.Object, e As System.EventArgs) Handles btnNewPart.Click
      ' inserisco un nuovo gruppo (piece) sotto la radice
      Dim nIdNewPart As Integer = EgtCreateGroup(GDB_ID.ROOT)
      ' inserisco un nuovo gruppo (layer) sotto quello appena creato
      Dim nIdNewLayer As Integer = EgtCreateGroup(nIdNewPart)
      ' se ok, salvo nuova situazione
      If nIdNewPart <> GDB_ID.NULL And nIdNewLayer <> GDB_ID.NULL Then
         m_nCurrPart = nIdNewPart
         m_nCurrLayer = nIdNewLayer
         SetModified()
      End If
      ' aggiorno visualizzazione
      EmitCurrPartLayer()
      LoadObjTree()
   End Sub

   Private Sub btnNewLayer_Click(sender As System.Object, e As System.EventArgs) Handles btnNewLayer.Click
      ' inserisco un nuovo gruppo (layer) sotto il pezzo corrente
      Dim nIdNewLayer As Integer = EgtCreateGroup(m_nCurrPart)
      ' se ok, salvo nuova situazione
      If nIdNewLayer <> GDB_ID.NULL Then
         m_nCurrLayer = nIdNewLayer
         SetModified()
      End If
      ' aggiorno visualizzazione
      EmitCurrPartLayer()
      LoadObjTree()
   End Sub

   Private Sub btnColor_Click(sender As System.Object, e As System.EventArgs) Handles btnColor.Click
      Dim nCurrId As Integer
      If m_nCurrPart <> GDB_ID.NULL Then
         nCurrId = m_nCurrPart
         If m_nCurrLayer <> GDB_ID.NULL Then
            nCurrId = m_nCurrLayer
         End If
      Else
         Return
      End If
      Dim colObj As Color3d
      EgtGetCalcColor(nCurrId, colObj)
      ColorDialog1.Color = colObj.ToColor()
      If ColorDialog1.ShowDialog() = Windows.Forms.DialogResult.OK Then
         colObj.FromColor(ColorDialog1.Color)
         EgtSetColor(nCurrId, colObj)
         EmitCurrPartLayer()
         SetModified()
         EgtDraw()
      End If
   End Sub

   Private Function SetCurrPartLayer(ByVal nPart As Integer, ByVal nLayer As Integer)
      ' verifico esistenza
      If Not EgtExistsObj(nPart) Or EgtGetParent(nLayer) <> nPart Then
         Return False
      End If
      ' assegno
      m_nCurrPart = nPart
      m_nCurrLayer = nLayer
      ' aggiorno visualizzazione
      EmitCurrPartLayer()
      Return True
   End Function

   Private Sub ResetCurrPartLayer()
      ' reset
      m_nCurrPart = GDB_ID.NULL
      m_nCurrLayer = GDB_ID.NULL
      ' cerco il primo pezzo
      Dim nIdPart As Integer = EgtGetFirstGroupInGroup(GDB_ID.ROOT)
      If nIdPart <> GDB_ID.NULL Then
         ' assegno il pezzo corrente
         m_nCurrPart = nIdPart
         ' cerco il primo layer del pezzo
         Dim nIdLayer As Integer = EgtGetFirstGroupInGroup(m_nCurrPart)
         If nIdLayer <> GDB_ID.NULL Then
            ' assegno il layer corrente
            m_nCurrLayer = nIdLayer
         End If
      End If
      ' aggiorno visualizzazione
      EmitCurrPartLayer()
   End Sub

   Private Function GetCurrPart() As Integer
      Return m_nCurrPart
   End Function

   Private Function GetCurrLayer() As Integer
      Return m_nCurrLayer
   End Function

   Private Sub EmitCurrPartLayer()
      Dim sText As String = "   "
      Dim colObj As Color3d
      EgtGetColor(GDB_ID.ROOT, colObj)
      If m_nCurrPart <> GDB_ID.NULL Then
         sText = "Part " + m_nCurrPart.ToString()
         EgtGetCalcColor(m_nCurrPart, colObj)
         If m_nCurrLayer <> GDB_ID.NULL And EgtExistsObj(m_nCurrLayer) Then
            sText += " --> Layer " + m_nCurrLayer.ToString()
            EgtGetCalcColor(m_nCurrLayer, colObj)
         End If
      End If
      txtPartLay.Text = sText
      txtColor.BackColor = colObj.ToColor()
   End Sub


 '-------------------------------- Tree View ------------------------------------------------------
   Private m_nObjTreeOldId 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

   Private Sub LoadObjTree()
      ClearObjTree()
      TreeView1.BeginUpdate()
      'TreeView1.Nodes.Add(GDB_ID.NULL.ToString, "No Selection", 0, 0)
      AddGroupInObjTree(GDB_ID.ROOT, 0, TreeView1.Nodes)
      TreeView1.EndUpdate()
   End Sub

   Private Sub ClearObjTree()
      RevertOldIdInObjTree()
      TreeView1.Nodes.Clear()
   End Sub

   Private Sub AddGroupInObjTree(ByVal nGroupId As Integer, ByVal nLev As Integer, ByRef PrevNodColl As TreeNodeCollection)

      Dim CurrNodColl As TreeNodeCollection

      If nGroupId = GDB_ID.ROOT Then
         CurrNodColl = PrevNodColl
      Else
         Dim sName As String = String.Empty
         Dim sText As String = String.Empty
         If EgtGetName(nGroupId, sName) Then
            If nLev = 1 Then
               sText = sName + " (Part " + nGroupId.ToString + ")"
            ElseIf nLev = 2 Then
               sText = sName + " (Layer " + nGroupId.ToString + ")"
            Else
               sText = sName + " (Group " + nGroupId.ToString + ")"
            End If
         Else
            If nLev = 1 Then
               sText = "Part " + nGroupId.ToString
            ElseIf nLev = 2 Then
               sText = "Layer " + nGroupId.ToString
            Else
               sText = "Group " + nGroupId.ToString
            End If
         End If
         Dim nImage As Integer = TypeToImageInObjTree(TY.GROUP, nLev)
         CurrNodColl = PrevNodColl.Add(nGroupId.ToString, sText, nImage, nImage).Nodes
      End If

      Dim nObjs As Integer = EgtGetGroupObjs(nGroupId)
      If (nObjs > 20000) Then
         CurrNodColl.Add("-1", "Too many entities")
         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 = TY.GROUP Then
            AddGroupInObjTree(nId, nLev + 1, CurrNodColl)
         'se oggetto geometrico
         ElseIf nType >= 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 nImage As Integer = TypeToImageInObjTree(nType, nLev)
            CurrNodColl.Add(nId.ToString, sText, nImage, nImage)
         End If
         'passo al successivo
         nId = EgtGetNext(nId)
      End While
   End Sub

   Private Function TypeToImageInObjTree(ByVal nType As Integer, ByVal nLev As Integer) As Integer
      Select Case nType
      Case TY.GROUP
         If nLev = 1 Then
            Return 3
         ElseIf nLev = 2 Then
            Return 4
         Else
            Return 2
         End If
      Case TY.GEO_VECTOR
         Return 5
      Case TY.GEO_POINT
         Return 6
      Case TY.GEO_FRAME
         Return 7
      Case TY.CRV_LINE
         Return 8
      Case TY.CRV_ARC
         Return 9
      Case TY.CRV_BEZ
         Return 10
      Case TY.CRV_COMPO
         Return 11
      Case TY.SRF_MESH
         Return 12
      Case TY.EXT_TEXT
         Return 13
      End Select
      Return 1
   End Function

   Private Sub ObjTree_AfterSelect(ByVal sender As Object, ByVal e As TreeViewEventArgs) Handles TreeView1.AfterSelect
      ' 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
      If m_nObjTreeOldId <> GDB_ID.NULL Then
         ' evidenzio
         EgtSetMark(m_nObjTreeOldId)
         EgtDraw()
         ' lancio timer per successiva de-evidenziazione
         ObjTreeTimer.Stop()
         ObjTreeTimer.Start()
      End If
   End Sub

   Private Sub ObjTree_MouseDoubleClick(ByVal sender As Object, e As MouseEventArgs) Handles TreeView1.MouseDoubleClick
      If m_nObjTreeOldId <> GDB_ID.NULL Then
         ' recupero il padre
         Dim nIdParent As Integer = EgtGetParent(m_nObjTreeOldId)
         If nIdParent = GDB_ID.NULL Then
            Return
         ' se Part
         ElseIf nIdParent = GDB_ID.ROOT Then
            ' cerco il primo Layer del Part
            Dim nId As Integer = EgtGetFirstGroupInGroup(m_nObjTreeOldId)
            SetCurrPartLayer(m_nObjTreeOldId, nId)
         ' se Layer
         ElseIf EgtGetParent(nIdParent) = GDB_ID.ROOT Then
            SetCurrPartLayer(nIdParent, m_nObjTreeOldId)
         End If
      End If
   End Sub

   Private Sub ObjTree_KeyDown(ByVal sender As System.Object, ByVal e As KeyEventArgs) Handles TreeView1.KeyDown
      ' Con DEL eseguo cancellazione del pezzo o del layer selezionati
      If e.KeyData = Keys.Delete Then
         ' posso partire solo da stato libero
         If m_nStatus <> EST.NULL Then
            Return
         End If
         ' lancio la cancellazione
         If m_nObjTreeOldId <> GDB_ID.NULL Then
            EgtErase(m_nObjTreeOldId)
            SetModified()
            ' reset stato scena
            Scene1.ResetStatus()
            ' reset stato
            m_nStatus = EST.NULL
            ToolStripStatusOutput.Text = ""
            ' aggiorno visualizzazione
            If m_nObjTreeOldId = m_nCurrPart Or m_nObjTreeOldId = m_nCurrLayer Then
               ResetCurrPartLayer()
            End If
            m_nObjTreeOldId = GDB_ID.NULL
            LoadObjTree()
         End If
      End If
   End Sub

   Private Sub UpdateObjInObjTree(ByVal nId As Integer)
      ' ripristino eventuale vecchio oggetto selezionato
      RevertOldIdInObjTree()
      ' recupero il tipo del nuovo oggetto
      Dim nType As Integer = EgtGetType(nId)
      ' stampa dei dati del nuovo oggetto
      Dim sDump As String = String.Empty
      If nType = TY.NONE Then
         tBoxInfo.Text = String.Empty
      ElseIf nType = TY.GROUP Then
         If EgtGroupDump(nId, sDump) Then
            tBoxInfo.Text = sDump
         Else
            tBoxInfo.Text = String.Empty
         End If
      Else
         If EgtGeoObjDump(nId, sDump) Then
            tBoxInfo.Text = sDump
         Else
            tBoxInfo.Text = String.Empty
         End If
      End If
      ' permetto in ogni caso la visualizzazione dell'oggetto e lo evidenzio
      Dim nOldMode As Integer = GDB_MD.STD
      EgtGetMode(nId, nOldMode)
      Dim nMode As Integer = IIf((nOldMode = GDB_MD.HIDDEN), GDB_MD.STD, nOldMode)
      EgtSetMode(nId, nMode)
      Dim nOldStatus As Integer = GDB_ST.ON_
      EgtGetStatus(nId, nOldStatus)
      Dim nStat As Integer = IIf((nOldStatus = GDB_ST.OFF), GDB_ST.ON_, nOldStatus)
      EgtSetStatus(nId, nStat)
      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
         ' ripristino il modo e lo stato precedente dell'oggetto e lo smarco
         EgtRevertMode(m_nObjTreeOldId)
         EgtRevertStatus(m_nObjTreeOldId)
         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 TreeNode = TreeView1.Nodes.Find(nId.ToString, True)
      If tNode.Length > 0 Then
         TreeView1.SelectedNode = tNode(0)
         Return True
      Else
         Return False
      End If
   End Function

 '-------------------------------- Modified Status ------------------------------------------------
   Private m_bModified As Boolean = False

   Private Sub SetModified()
      m_bModified = True
      EmitTitle()
   End Sub

   Private Sub ResetModified()
      m_bModified = False
      EmitTitle()
   End Sub

   Private Function ManageModified() As Boolean
      ' se non modificato, procedo normalmente
      If Not m_bModified Then
         Return True
      End If
      ' chiedo cosa fare
      Dim sMsg As String = "Salvare le modifiche"
      If Not String.IsNullOrEmpty(m_sCurrFile) Then
         sMsg += " a " + m_sCurrFile
      End If
      sMsg += " ?"
      Dim nRes = MessageBox.Show(sMsg, "", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Question)
      Select Case nRes
      Case Windows.Forms.DialogResult.Yes
         Scene1.SaveProject(m_sCurrFile)
         Return True
      Case Windows.Forms.DialogResult.No
         Return True
      Case Else
         Return False
      End Select
   End Function


  '-------------------------------- Program Title --------------------------------------------------
  Private Sub EmitTitle()
      ' nome file
      Dim sTitle As String = m_sCurrFile
      If String.IsNullOrEmpty(m_sCurrFile) Then
         sTitle = "New"
      End If
      ' indicazione di modificato 
      If m_bModified Then
         sTitle += "*"
      End If
      ' dati del prodotto
      sTitle += " - EgalTech TestEIn"
      ' emissione del titolo
      Me.Text = sTitle
   End Sub

End Class