form1.frm

ＧＩＳ二次开发

VERSION 5.00
Object = "{C552EA90-6FBB-11D5-A9C1-00104BB6FC1C}#1.0#0"; "MapControl.ocx"
Begin VB.Form Form1 
   Caption         =   "地图漫游缩放"
   ClientHeight    =   8100
   ClientLeft      =   60
   ClientTop       =   450
   ClientWidth     =   10185
   LinkTopic       =   "Form1"
   ScaleHeight     =   8100
   ScaleWidth      =   10185
   StartUpPosition =   3  'Windows Default
   Begin VB.CommandButton Center 
      Caption         =   "居中"
      Height          =   615
      Left            =   5520
      TabIndex        =   3
      Top             =   7560
      Width           =   2775
   End
   Begin VB.CommandButton ZoomOut 
      Caption         =   "缩小"
      Height          =   615
      Left            =   2760
      TabIndex        =   2
      Top             =   7560
      Width           =   2775
   End
   Begin VB.CommandButton ZoomIn 
      Caption         =   "放大"
      Height          =   615
      Left            =   0
      TabIndex        =   1
      Top             =   7560
      Width           =   2775
   End
   Begin esriMapControl.MapControl MapControl1 
      Height          =   7575
      Left            =   0
      OleObjectBlob   =   "Form1.frx":0000
      TabIndex        =   0
      Top             =   0
      Width           =   8295
   End
   Begin VB.Label Label1 
      Caption         =   $"Form1.frx":247E
      Height          =   8175
      Left            =   8280
      TabIndex        =   4
      Top             =   0
      Width           =   1935
   End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Private Sub Center_Click()
   MapControl1.Extent = MapControl1.FullExtent
End Sub

Private Sub Form_Load()

End Sub

Private Sub Form_Resize()
Dim dWidth As Double, dheight As Double, dMargin As Double
dMargin = ZoomIn.Top
dheight = Form1.ScaleHeight - MapControl1.Top - dMargin
If dheight > 0 Then
     MapControl1.Height = dheight
     'TOCControl1.Height = dheight
     End If
End Sub

Private Sub MapControl1_OnMouseDown(ByVal button As Long, ByVal shift As Long, ByVal x As Long, ByVal y As Long, ByVal mapX As Double, ByVal mapY As Double)
If button = 1 Then
   MapControl1.Extent = MapControl1.TrackRectangle
ElseIf button = 2 Then
   MapControl1.Pan
End If
End Sub

Private Sub ZoomIn_Click()

   Dim pEnvelop As IEnvelope
   Set pEnvelop = MapControl1.Extent
   pEnvelop.Expand 0.5, 0.5, True
   MapControl1.Extent = pEnvelop


End Sub

Private Sub ZoomOut_Click()
   Dim pEnvelop As IEnvelope
   Set pEnvelop = MapControl1.Extent
   pEnvelop.Expand 2, 2, True
   MapControl1.Extent = pEnvelop
End Sub