layer.frm

MapX示例程序：编辑特征示例

VERSION 5.00
Begin VB.Form Layer 
   Caption         =   "图层属性"
   ClientHeight    =   3705
   ClientLeft      =   60
   ClientTop       =   510
   ClientWidth     =   5400
   LinkTopic       =   "Form1"
   ScaleHeight     =   3705
   ScaleWidth      =   5400
   StartUpPosition =   3  '窗口缺省
   Begin VB.CommandButton Command2 
      Caption         =   "取  消"
      Height          =   375
      Left            =   3960
      TabIndex        =   12
      Top             =   3240
      Width           =   1215
   End
   Begin VB.CommandButton Command1 
      Caption         =   "确  定"
      Height          =   375
      Left            =   2640
      TabIndex        =   11
      Top             =   3240
      Width           =   1215
   End
   Begin VB.TextBox Text2 
      Height          =   270
      Left            =   3360
      TabIndex        =   10
      Text            =   "Text1"
      Top             =   2760
      Width           =   1455
   End
   Begin VB.TextBox Text1 
      Height          =   270
      Left            =   1080
      TabIndex        =   8
      Text            =   "Text1"
      Top             =   2760
      Width           =   1455
   End
   Begin VB.CheckBox Check4 
      Caption         =   "缩放图层(ZoomLayer属性)"
      Height          =   255
      Left            =   240
      TabIndex        =   6
      Top             =   2400
      Width           =   4935
   End
   Begin VB.CheckBox Check3 
      Caption         =   "图层是否可见(Visible属性)"
      Height          =   255
      Left            =   240
      TabIndex        =   5
      Top             =   2040
      Width           =   4935
   End
   Begin VB.CheckBox Check2 
      Caption         =   "识别用户何时单击此图层(Selectable属性)"
      Height          =   255
      Left            =   240
      TabIndex        =   3
      Top             =   1680
      Width           =   4935
   End
   Begin VB.CheckBox Check1 
      Caption         =   "自动标记(AutoLabel属性)"
      Height          =   255
      Left            =   240
      TabIndex        =   2
      Top             =   1320
      Width           =   4935
   End
   Begin VB.Label Label5 
      Caption         =   "Max:"
      Height          =   255
      Left            =   2760
      TabIndex        =   9
      Top             =   2760
      Width           =   615
   End
   Begin VB.Label Label4 
      Caption         =   "Min:"
      Height          =   255
      Left            =   480
      TabIndex        =   7
      Top             =   2760
      Width           =   615
   End
   Begin VB.Label Label3 
      BorderStyle     =   1  'Fixed Single
      Caption         =   "Label1"
      Height          =   255
      Left            =   240
      TabIndex        =   4
      Top             =   960
      Width           =   4935
   End
   Begin VB.Label Label2 
      BorderStyle     =   1  'Fixed Single
      Caption         =   "Label1"
      Height          =   255
      Left            =   240
      TabIndex        =   1
      Top             =   600
      Width           =   4935
   End
   Begin VB.Label Label1 
      BorderStyle     =   1  'Fixed Single
      Caption         =   "Label1"
      Height          =   255
      Left            =   240
      TabIndex        =   0
      Top             =   240
      Width           =   4935
   End
End
Attribute VB_Name = "Layer"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Public LayerIndex As Long

Public Sub LoadProp()
'读入图层属性
    Dim lyr As MapXLib.Layer
    Set lyr = Main.Map1.Layers(LayerIndex)
    
    Label1.Caption = "图层名:" & lyr.Name
    
    '获取图层类型
    Select Case lyr.Type
        Case miLayerTypeNormal
            Label2.Caption = "图层类型:一般图层"
        Case miLayerTypeRaster
            Label2.Caption = "图层类型:栅格图层"
        Case miLayerTypeSeamless
            Label2.Caption = "图层类型:无缝图层"
        Case miLayerTypeUnknown
            Label2.Caption = "图层类型:未知图层"
        Case miLayerTypeUserDraw
            Label2.Caption = "图层类型:用户绘制图层"
        Case miLayerTypeDrilldown
            Label2.Caption = "图层类型:逐层细化图层"
    End Select
    
    '获取图元类型
    Select Case lyr.PredominantFeatureType
        Case miFeatureTypeRegion
            Label3.Caption = "图元类型:区域(多边形)"
        Case miFeatureTypeLine
            Label3.Caption = "图元类型:线"
        Case miFeatureTypeSymbol
            Label3.Caption = "图元类型:符号(点)"
        Case miFeatureTypeUnknown
            Label3.Caption = "图元类型:未知类型"
        Case miFeatureTypeText
            Label3.Caption = "图元类型:文字"
    End Select
    
    If lyr.AutoLabel = True Then
        Check1.Value = 1
    Else
        Check1.Value = 0
    End If
    
    If lyr.Selectable = True Then
        Check2.Value = 1
    Else
        Check2.Value = 0
    End If
    
    If lyr.Visible = True Then
        Check3.Value = 1
    Else
        Check3.Value = 0
    End If
    
    If lyr.ZoomLayer = True Then
        Check4.Value = 1
    Else
        Check4.Value = 0
    End If
    
    Text1.Text = CStr(lyr.ZoomMin)
    Text2.Text = CStr(lyr.ZoomMax)
    
End Sub

Public Sub SaveProp()
'根据用户设定设置图层属性
    Dim lyr As MapXLib.Layer
    Set lyr = Main.Map1.Layers(LayerIndex)
    
    If Check1.Value = 1 Then
        lyr.AutoLabel = True
    Else
        lyr.AutoLabel = False
    End If
    
    If Check2.Value = 1 Then
        lyr.Selectable = True
    Else
        lyr.Selectable = False
    End If
    
    If Check3.Value = 1 Then
        lyr.Visible = True
    Else
        lyr.Visible = False
    End If
    
    If Check4.Value = 1 Then
        lyr.ZoomLayer = True
    Else
        lyr.ZoomLayer = False
    End If
    
    lyr.ZoomMin = Val(Text1.Text)
    lyr.ZoomMax = Val(Text2.Text)
    
End Sub

'"确定"按钮单击响应事件
Private Sub Command1_Click()
    Call SaveProp
    Unload Me
End Sub

'"取消"按钮单击响应时间
Private Sub Command2_Click()
    Unload Me
End Sub