projector.frm

MO VB地理信息系统程序设计

VERSION 5.00
Object = "{9BD6A640-CE75-11D1-AF04-204C4F4F5020}#2.0#0"; "mo20.ocx"
Object = "{F9043C88-F6F2-101A-A3C9-08002B2F49FB}#1.2#0"; "comdlg32.ocx"
Begin VB.Form Form1 
   Caption         =   "Projector Sample"
   ClientHeight    =   8595
   ClientLeft      =   885
   ClientTop       =   1035
   ClientWidth     =   6795
   LinkTopic       =   "Form1"
   ScaleHeight     =   8595
   ScaleWidth      =   6795
   Begin VB.CommandButton CmdRemoveLyr 
      Caption         =   "Remove Layer"
      Height          =   495
      Left            =   120
      Style           =   1  'Graphical
      TabIndex        =   14
      Top             =   720
      Width           =   1455
   End
   Begin MSComDlg.CommonDialog CommonDialog1 
      Left            =   6000
      Top             =   4440
      _ExtentX        =   847
      _ExtentY        =   847
      _Version        =   393216
   End
   Begin VB.CommandButton CmdExport 
      Caption         =   "Export Layer Projected"
      Height          =   495
      Left            =   120
      Style           =   1  'Graphical
      TabIndex        =   13
      Top             =   2640
      Width           =   1455
   End
   Begin VB.CommandButton CmdReadPRJ 
      Caption         =   "Read PRJ File"
      Height          =   495
      Left            =   120
      Style           =   1  'Graphical
      TabIndex        =   12
      Top             =   2040
      Width           =   1455
   End
   Begin VB.CommandButton CmdFullExt 
      Caption         =   "Full Extent"
      Height          =   495
      Left            =   120
      Style           =   1  'Graphical
      TabIndex        =   8
      Top             =   1440
      Width           =   1455
   End
   Begin VB.CommandButton CmdSetMapCS 
      Caption         =   "Set Map Coordinate System"
      Height          =   615
      Left            =   5280
      Style           =   1  'Graphical
      TabIndex        =   7
      Top             =   3960
      Width           =   1455
   End
   Begin VB.CommandButton CmdSetLyrCS 
      Caption         =   "Set  Layer Coordinate System"
      Height          =   615
      Left            =   3600
      Style           =   1  'Graphical
      TabIndex        =   6
      Top             =   3960
      Width           =   1455
   End
   Begin VB.ComboBox CboCS 
      Height          =   315
      Left            =   3600
      TabIndex        =   4
      Text            =   "Combo1"
      Top             =   3480
      Width           =   3135
   End
   Begin VB.Frame Frame1 
      Height          =   1335
      Left            =   120
      TabIndex        =   2
      Top             =   3360
      Width           =   3135
      Begin VB.OptionButton OptCS 
         Caption         =   "File Coordinate System"
         Height          =   255
         Index           =   2
         Left            =   240
         TabIndex        =   11
         Top             =   960
         Width           =   2535
      End
      Begin VB.OptionButton OptCS 
         Caption         =   "Geographic Coordinate System"
         Height          =   255
         Index           =   1
         Left            =   240
         TabIndex        =   5
         Top             =   600
         Width           =   2535
      End
      Begin VB.OptionButton OptCS 
         Caption         =   "Projected Coordinate System"
         Height          =   255
         Index           =   0
         Left            =   240
         TabIndex        =   3
         Top             =   240
         Width           =   2535
      End
   End
   Begin VB.CommandButton CmdAddLyr 
      Caption         =   "Add Layer"
      Height          =   495
      Left            =   120
      Style           =   1  'Graphical
      TabIndex        =   1
      Top             =   120
      Width           =   1455
   End
   Begin MapObjects2.Map Map1 
      Height          =   3135
      Left            =   1680
      TabIndex        =   0
      Top             =   120
      Width           =   5055
      _Version        =   131072
      _ExtentX        =   8916
      _ExtentY        =   5530
      _StockProps     =   225
      BackColor       =   16777215
      BorderStyle     =   1
      Contents        =   "Projector.frx":0000
   End
   Begin VB.Label LabCSMap 
      BackColor       =   &H0080FFFF&
      Caption         =   "Map CoordSys:"
      Height          =   4935
      Left            =   3480
      TabIndex        =   10
      Top             =   4920
      Width           =   3255
   End
   Begin VB.Label LabCSLyr 
      BackColor       =   &H00FFFF80&
      Caption         =   "Layer CoordSys:"
      Height          =   4935
      Left            =   120
      TabIndex        =   9
      Top             =   4920
      Width           =   3135
   End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Dim ShpLayer As New MapObjects2.MapLayer
Dim StrsGCS As New MapObjects2.Strings
Dim StrsPCS As New MapObjects2.Strings
Dim CSfile As Object
Dim CSCompo As New MapObjects2.ProjCoordSys

Private Sub CmdExport_Click()
'Exports the layer (along with it's PRJ file) to the coordinate system of the map
  'Set up the dialog to allow the user to save the shapefile out
  
  CommonDialog1.Filter = "ESRI Shapefiles (*.shp)|*.shp"
  
  'Set cancel error so that if cancel is used then we can trap it and exit
  CommonDialog1.CancelError = True
  On Error GoTo ErrorTrap
  CommonDialog1.ShowSave
  
  If Len(CommonDialog1.filename) = 0 Then Exit Sub
  
  Screen.MousePointer = vbHourglass
  
  'Export the layer's records to the Coordinatesystem currently set for the map
  ShpLayer.Records.Export CommonDialog1.filename, Map1.CoordinateSystem
  
  Screen.MousePointer = vbDefault
  Exit Sub
  
ErrorTrap:
  If Err.Number <> 32755 Then 'Error is something other than Cancel
    MsgBox Err.Description, vbCritical
  End If
  Exit Sub

End Sub

Private Sub CmdFullExt_Click()
  Map1.Extent = Map1.FullExtent
End Sub

Private Sub CmdReadPRJ_Click()
    Dim DC As New MapObjects2.DataConnection
'   Dim StrPath As String
    Dim strCSType As String
    
    CommonDialog1.CancelError = True
    On Error GoTo ErrorTrap
    CommonDialog1.Filter = "PRJ Files (*.prj)|*.prj|AI PRJ Files (prj.adf)|prj.adf|All Files (*.*)|*.*"
    
    CommonDialog1.ShowOpen
    
    DC.Database = CurDir & "\"
    If Not DC.Connect Then
      MsgBox "Could not connect to database" & Chr(13) & DC.ConnectError
    Else
      If Right(CommonDialog1.FileTitle, 3) = "adf" Then
        Set CSfile = DC.FindArcInfoCoordinateSystem(CommonDialog1.FileTitle)
      Else
        Set CSfile = DC.FindCoordinateSystem(CommonDialog1.FileTitle)
      End If
      If CSfile Is Nothing Then
        MsgBox "Not a valid projection file", vbExclamation
        OptCS(2).Enabled = False
      Else
        If CSfile.IsProjected Then
          strCSType = "Projected Coordinate System"
        Else
          strCSType = "Geographic Coordinate System"
        End If
        MsgBox "Created new " & strCSType & vbNewLine & vbNewLine & "Name: " & CSfile.Name & vbNewLine & "Type: " & CSfile.Type
        OptCS(2).Enabled = True
        OptCS(2).Value = True
      End If
    End If
    
  Exit Sub
  
ErrorTrap:
  If Err.Number <> 32755 Then 'Error is something other than Cancel
    MsgBox Err.Description, vbCritical
  End If
  Exit Sub
End Sub

Private Sub CmdRemoveLyr_Click()
  ' Clear all map layers from map
  Map1.Layers.Clear

  CmdAddLyr.Enabled = True
  LabCSLyr.Caption = "Layer CoordSys: "
  LabCSMap.Caption = "Map CoordSys: "

End Sub

Private Sub CmdSetLyrCS_Click()

  'Check to see if custom type has been selected
  If OptCS.Item(2).Value = True Then
    ShpLayer.CoordinateSystem = CSfile
  Else 'Otherwise create a new CS
    'Dim an object which can later be set to either a ProjCoordSsys or a GeoCoordSys
    Dim CSLayer As Object
    
    'Has the user selected GeoCoordsys or ProjCoordSys
    If OptCS.Item(0).Value = True Then
      Set CSLayer = New MapObjects2.ProjCoordSys
    Else
      Set CSLayer = New MapObjects2.GeoCoordSys
    End If
    
    'Set the type of the Coordsys based upon a predefined value (from the CboCS - combobox)
    CSLayer.Type = stripProj(CboCS.Text)
    'Set the coordsys for the Layer
    ShpLayer.CoordinateSystem = CSLayer
  End If
  
  'Enable the user to specify the Coordsys for the map, but prevent them from changing the layer's
  CmdSetMapCS.Enabled = True
  CmdExport.Enabled = True
  Map1.Refresh
  'CmdSetLyrCS.Enabled = False
  ReportLyrCS ShpLayer.CoordinateSystem
  
End Sub

Private Sub CmdSetMapCS_Click()
  
    'Check to see if custom type has been selected
    If OptCS.Item(2).Value = True Then
        Map1.CoordinateSystem = CSfile
    Else 'Otherwise create a new CS
        'Dim an object which can later be set to either a ProjCoordSsys or a GeoCoordSys
        Dim CSMap As Object
        'Has the user selected GeoCoordsys or ProjCoordSys
        If OptCS.Item(0).Value = True Then
          Set CSMap = New MapObjects2.ProjCoordSys
        Else
          Set CSMap = New MapObjects2.GeoCoordSys
        End If
        
        'Set the type of the Coordsys based upon a predefined value (from the CboCS - combobox)
        CSMap.Type = stripProj(CboCS.Text)
        
        'Set the coordsys for the Map (this will cause the map to refresh)
        Map1.CoordinateSystem = CSMap
    End If
  
    'Allow the user to export the Map's CS

    ReportMapCS Map1.CoordinateSystem
End Sub


Private Sub Form_Load()

  'This takes a while - let me entertain you...
  Form2.Show