form07b.frm

来自「给出了详细的vb环境下mo基本功能的代码 如图层的加载」· FRM 代码 · 共 136 行

VERSION 5.00
Object = "{9BD6A640-CE75-11D1-AF04-204C4F4F5020}#2.0#0"; "mo20.ocx"
Begin VB.Form Form07b 
   Caption         =   "墨西哥地图"
   ClientHeight    =   6360
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   8400
   LinkTopic       =   "Form1"
   ScaleHeight     =   6360
   ScaleWidth      =   8400
   StartUpPosition =   3  '窗口缺省
   Begin VB.CommandButton Command4 
      Caption         =   "右"
      Height          =   495
      Left            =   6240
      TabIndex        =   4
      Top             =   5760
      Width           =   1215
   End
   Begin VB.CommandButton Command3 
      Caption         =   "左"
      Height          =   495
      Left            =   4440
      TabIndex        =   3
      Top             =   5760
      Width           =   1215
   End
   Begin VB.CommandButton Command2 
      Caption         =   "下"
      Height          =   495
      Left            =   2640
      TabIndex        =   2
      Top             =   5760
      Width           =   1215
   End
   Begin VB.CommandButton Command1 
      Caption         =   "上"
      Height          =   495
      Left            =   840
      TabIndex        =   1
      Top             =   5760
      Width           =   1335
   End
   Begin MapObjects2.Map Map1 
      Height          =   5655
      Left            =   0
      TabIndex        =   0
      Top             =   0
      Width           =   8415
      _Version        =   131072
      _ExtentX        =   14843
      _ExtentY        =   9975
      _StockProps     =   225
      BackColor       =   16777215
      BorderStyle     =   1
      Contents        =   "form07b.frx":0000
   End
End
Attribute VB_Name = "Form07b"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
'Xuewei,2003/5/7
'在墨西哥图上画矩形，可以上下左右移动；
Option Explicit
Dim Rect As MapObjects2.Rectangle
Dim Mul As Single

Private Sub Command1_Click()
   Rect.Top = Rect.Top + Mul * 0.02
   Rect.Bottom = Rect.Bottom + Mul * 0.02
   Map1.Refresh
End Sub

Private Sub Command2_Click()
   Rect.Top = Rect.Top - Mul * 0.02
   Rect.Bottom = Rect.Bottom - Mul * 0.02
   Map1.Refresh
End Sub

Private Sub Command3_Click()
   Rect.Left = Rect.Left - Mul * 0.02
   Rect.Right = Rect.Right - Mul * 0.02
   Map1.Refresh
End Sub

Private Sub Command4_Click()
   Rect.Left = Rect.Left + Mul * 0.02
   Rect.Right = Rect.Right + Mul * 0.02
   Map1.Refresh
End Sub

Private Sub Form_Load()
  DrawLayer
  Mul = 100
  Set Rect = New MapObjects2.Rectangle
  Rect.Top = Mul * 0.25 '离底部下边
  Rect.Left = Mul * -1.1  '左边
  Rect.Bottom = Mul * 0.28 '离底部上边
  Rect.Right = Mul * -1.05  '右边
  Map1.Refresh
End Sub

Private Sub Map1_AfterTrackingLayerDraw(ByVal hDC As stdole.OLE_HANDLE)
  If Not Rect Is Nothing Then
    Dim sym As New Symbol
    sym.SymbolType = moFillSymbol
    sym.Style = 9
    sym.Size = 3
    sym.Color = moRed
    Map1.DrawShape Rect, sym
  End If
End Sub

Sub DrawLayer()
  Dim dc As New DataConnection
  Dim layer As MapLayer
  dc.Database = App.Path + "\..\" + "Mexico"
  If Not dc.Connect Then
    MsgBox "在指定的文件夹下没找到图层数据文件！"
    End
  End If
  
  Set layer = New MapLayer
  Set layer.GeoDataset = dc.FindGeoDataset("States")
  layer.Symbol.Color = moLimeGreen
  Map1.Layers.Add layer
  
  Map1.Layers.Add layer
End Sub