form03.frm

mo 二次开发 实现mo的一般功能

VERSION 5.00
Object = "{9BD6A640-CE75-11D1-AF04-204C4F4F5020}#2.0#0"; "mo20.ocx"
Object = "{6B7E6392-850A-101B-AFC0-4210102A8DA7}#1.3#0"; "COMCTL32.OCX"
Begin VB.Form Form03 
   Caption         =   "华盛顿地图"
   ClientHeight    =   6675
   ClientLeft      =   1140
   ClientTop       =   1515
   ClientWidth     =   6795
   LinkTopic       =   "Form1"
   PaletteMode     =   1  'UseZOrder
   ScaleHeight     =   6675
   ScaleWidth      =   6795
   Begin VB.CheckBox Check1 
      Caption         =   "Check1"
      Height          =   375
      Left            =   2280
      TabIndex        =   1
      Top             =   6240
      Width           =   1335
   End
   Begin MapObjects2.Map Map1 
      Height          =   5415
      Left            =   0
      TabIndex        =   0
      Top             =   120
      Width           =   6735
      _Version        =   131072
      _ExtentX        =   11880
      _ExtentY        =   9551
      _StockProps     =   225
      BackColor       =   16777215
      BorderStyle     =   1
      WindowMode      =   1
      Contents        =   "form03.frx":0000
   End
   Begin VB.Label Label1 
      Caption         =   "Label1"
      Height          =   495
      Left            =   840
      TabIndex        =   2
      Top             =   5640
      Width           =   5775
   End
   Begin ComctlLib.ImageList ImageList1 
      Left            =   2760
      Top             =   1800
      _ExtentX        =   1005
      _ExtentY        =   1005
      BackColor       =   -2147483643
      ImageWidth      =   16
      ImageHeight     =   16
      MaskColor       =   8421376
      _Version        =   327682
      BeginProperty Images {0713E8C2-850A-101B-AFC0-4210102A8DA7} 
         NumListImages   =   3
         BeginProperty ListImage1 {0713E8C3-850A-101B-AFC0-4210102A8DA7} 
            Picture         =   "form03.frx":001A
            Key             =   ""
         EndProperty
         BeginProperty ListImage2 {0713E8C3-850A-101B-AFC0-4210102A8DA7} 
            Picture         =   "form03.frx":056C
            Key             =   ""
         EndProperty
         BeginProperty ListImage3 {0713E8C3-850A-101B-AFC0-4210102A8DA7} 
            Picture         =   "form03.frx":0ABE
            Key             =   ""
         EndProperty
      EndProperty
   End
End
Attribute VB_Name = "Form03"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
'Xuewei,2003/6/11,来自MO的Help；
'使用ImageLayer图层调用一个BMP图像，和MapLayer图层叠加；
'设置透明图层；

Option Explicit

Dim dataDir As String
Dim iLayer As New ImageLayer

Private Sub DrawLayer()
  Dim dc As New DataConnection
  Dim mLayer As New MapLayer
   
  dc.Database = dataDir
  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 mLayer.GeoDataset = dc.FindGeoDataset("roads")
  mLayer.Symbol.Color = moRed
  Map1.Layers.Add mLayer
    
  iLayer.File = dataDir + "\Wash.bmp"
  iLayer.Transparent = True
  Map1.Layers.Add iLayer
End Sub

Private Sub Check1_Click()
  If Check1.Value Then
    Map1.Layers(0).Transparent = True
    Map1.Refresh
  Else
    Map1.Layers(0).Transparent = False
    Map1.Refresh
  End If
End Sub

Private Sub Form_Load()
  dataDir = App.Path + "\..\" + "Washington"
  DrawLayer        '加载图像图层；
  Check1.Caption = "设置透明"
  Label1.Caption = "没有设置透明颜色。"
End Sub

Private Sub Map1_MouseDown(Button As Integer, Shift As Integer, x As Single, y As Single)
  Dim cv As Long
  Dim r As Long
  Dim g As Long

  Dim b As Long
  Dim xf As Single
  Dim yf As Single
  Dim Rect As New MapObjects2.Rectangle
  
  If Button = 1 Then
    xf = x + Map1.Left
    yf = y + Map1.Top
    
    cv = Point(xf, yf)
    '按红、绿、蓝提取颜色；
    r = cv Mod &H100
    g = (cv \ &H100) Mod &H100
    b = (cv \ &H10000) Mod &H100
    Label1 = Str$(cv) & ": " & CDbl(r) & ", " & CDbl(g) & ", " & CDbl(b)
       
    Map1.Layers(0).TransparentColor = cv
    Map1.Refresh
    
  ElseIf Button = 2 Then
    Set Rect = Map1.TrackRectangle
    Map1.Extent = Rect
  End If
End Sub