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    VERSION 5.00
    Object = "{831FDD16-0C5C-11D2-A9FC-0000F8754DA1}#2.0#0"; "mscomctl.ocx"
    Begin VB.Form FrmBookType 
       BorderStyle     =   1  'Fixed Single
       Caption         =   "图书分类管理"
       ClientHeight    =   3525
       ClientLeft      =   45
       ClientTop       =   330
       ClientWidth     =   4980
       Icon            =   "FrmBookType.frx":0000
       LinkTopic       =   "Form1"
       MaxButton       =   0   'False
       MinButton       =   0   'False
       ScaleHeight     =   3525
       ScaleWidth      =   4980
       StartUpPosition =   1  '所有者中心
       Begin VB.CommandButton Cmd_Back 
          BackColor       =   &H80000004&
          Cancel          =   -1  'True
          Caption         =   "返 回"
          Height          =   400
          Left            =   3840
          MousePointer    =   99  'Custom
          Style           =   1  'Graphical
          TabIndex        =   4
          Top             =   2880
          Width           =   855
       End
       Begin VB.CommandButton Cmd_Del 
          BackColor       =   &H80000004&
          Caption         =   "删 除"
          Height          =   400
          Left            =   2640
          MousePointer    =   99  'Custom
          Style           =   1  'Graphical
          TabIndex        =   3
          Top             =   2880
          Width           =   855
       End
       Begin VB.CommandButton Cmd_Modi 
          BackColor       =   &H80000004&
          Caption         =   "修 改"
          Height          =   400
          Left            =   1440
          MousePointer    =   99  'Custom
          Style           =   1  'Graphical
          TabIndex        =   2
          Top             =   2880
          Width           =   855
       End
       Begin VB.CommandButton Cmd_Add 
          BackColor       =   &H80000004&
          Caption         =   "添 加"
          Default         =   -1  'True
          Height          =   400
          Left            =   240
          MousePointer    =   99  'Custom
          Style           =   1  'Graphical
          TabIndex        =   1
          Top             =   2880
          Width           =   855
       End
       Begin MSComctlLib.ImageList ImageList1 
          Left            =   4200
          Top             =   0
          _ExtentX        =   1005
          _ExtentY        =   1005
          BackColor       =   -2147483628
          ImageWidth      =   16
          ImageHeight     =   16
          MaskColor       =   16777215
          _Version        =   393216
          BeginProperty Images {2C247F25-8591-11D1-B16A-00C0F0283628} 
             NumListImages   =   5
             BeginProperty ListImage1 {2C247F27-8591-11D1-B16A-00C0F0283628} 
                Picture         =   "FrmBookType.frx":0442
                Key             =   ""
             EndProperty
             BeginProperty ListImage2 {2C247F27-8591-11D1-B16A-00C0F0283628} 
                Picture         =   "FrmBookType.frx":2DD4
                Key             =   ""
             EndProperty
             BeginProperty ListImage3 {2C247F27-8591-11D1-B16A-00C0F0283628} 
                Picture         =   "FrmBookType.frx":5766
                Key             =   ""
             EndProperty
             BeginProperty ListImage4 {2C247F27-8591-11D1-B16A-00C0F0283628} 
                Picture         =   "FrmBookType.frx":80F8
                Key             =   ""
             EndProperty
             BeginProperty ListImage5 {2C247F27-8591-11D1-B16A-00C0F0283628} 
                Picture         =   "FrmBookType.frx":AA8A
                Key             =   ""
             EndProperty
          EndProperty
       End
       Begin MSComctlLib.TreeView TreeView1 
          Height          =   2535
          Left            =   120
          TabIndex        =   0
          Top             =   120
          Width           =   4695
          _ExtentX        =   8281
          _ExtentY        =   4471
          _Version        =   393217
          HideSelection   =   0   'False
          LabelEdit       =   1
          Sorted          =   -1  'True
          Style           =   7
          HotTracking     =   -1  'True
          SingleSel       =   -1  'True
          ImageList       =   "ImageList1"
          BorderStyle     =   1
          Appearance      =   1
          MousePointer    =   99
          BeginProperty Font {0BE35203-8F91-11CE-9DE3-00AA004BB851} 
             Name            =   "宋体"
             Size            =   9
             Charset         =   134
             Weight          =   400
             Underline       =   0   'False
             Italic          =   0   'False
             Strikethrough   =   0   'False
          EndProperty
       End
    End
    Attribute VB_Name = "FrmBookType"
    Attribute VB_GlobalNameSpace = False
    Attribute VB_Creatable = False
    Attribute VB_PredeclaredId = True
    Attribute VB_Exposed = False
    Public TmpTypeId As Long
    
    Private Sub Cmd_Add_Click()
      Dim nUId As Integer
      '只允许存在两级，如果UpperId不为0，则不允许添加下级
      nUId = MyBookType.GetUpperId(CurBookType.TypeId)
      If nUId > 0 Then
        MsgBox "此项不能添加下级"
        Exit Sub
      End If
      '初始化FrmBookTypeEdit窗体的显示信息
      FrmBookTypeEdit.lblUpper = CurBookType.TypeName
      FrmBookTypeEdit.TmpUId = TmpTypeId
      FrmBookTypeEdit.txtType = ""
      FrmBookTypeEdit.Modify = False
      '打开编辑图书分类信息的窗体
      FrmBookTypeEdit.Show 1
      '读取当前节点的信息
      TreeView1_Click
    End Sub
    
    Private Sub Cmd_Back_Click()
      Unload Me
    End Sub
    
    Private Sub Cmd_Del_Click()
      If TreeView1.SelectedItem.Key = "a0" Then
        MsgBox "此项不能删除"
        Exit Sub
      End If
      '如果当前图书分类包含下一级图书分类，则不能删除
      If CurBookType.HaveSon(CurBookType.TypeId) = True Then
        MsgBox CurBookType.TypeName + " 包含下级图书分类，不能删除"
        Exit Sub
      End If
      '如果图书分类中包含下级分类，则不能删除
      If MyBookType.HaveSon(CurBookType.TypeId) = True Then
        MsgBox CurBookType.TypeName + " 包含下级分类，不能删除"
        Exit Sub
      End If
      '确定删除
      If MsgBox("是否确定要删除 " + Trim(TreeView1.SelectedItem.Text), vbYesNo, "请确认") = vbNo Then
        Exit Sub
      End If
      '删除图书分类
      Call CurBookType.Delete(CurBookType.TypeId)
      '从TreeView控件中删除当前选择的节点
      TreeView1.Nodes.Remove TreeView1.SelectedItem.Index
      TreeView1_Click
    End Sub
    
    Private Sub Cmd_Modi_Click()
      '不能修改根结点
      If TreeView1.SelectedItem.Key = "a0" Then
        MsgBox "此项不能修改"
        Exit Sub
      End If
      '将当前图书分类的信息赋值到编辑图书分类信息的窗口
      FrmBookTypeEdit.lblUpper = MyBookType.GetName(CurBookType.UpperId)
      FrmBookTypeEdit.txtType = CurBookType.TypeName
      FrmBookTypeEdit.Modify = True
      '启动图书分类信息编辑窗体
      FrmBookTypeEdit.Show 1
      '读取当前节点的信息
      TreeView1_Click
    End Sub
    
    Private Sub Form_Load()
      Dim TmpNode As Node
      '设置当前的焦点分类
      FocusClassName = "分类名称"
      Focuskey = ""
      
      '设置根结点
      Set TmpNode = TreeView1.Nodes.Add(, , "a0", "图书分类", 1, 3)
      TmpNode.Selected = True
      TmpNode.ExpandedImage = 2
      '调用函数将所有图书分类添加到TreeView1中
      Call AddtoTree(TreeView1, "a0")
      '读取当前节点的信息
      TreeView1_Click
    End Sub
    
    Private Sub TreeView1_Click()
      Dim Focuskey As String
      '根据关键字获取图书分类信息
      Focuskey = TreeView1.SelectedItem.Key
      CurBookType.TypeName = TreeView1.SelectedItem.Text
      CurBookType.TypeId = Val(Right(TreeView1.SelectedItem.Key, Len(TreeView1.SelectedItem.Key) - 1))
      TmpTypeId = CurBookType.TypeId
      If Focuskey = "a0" Then '根结点
        Exit Sub
      End If
      '如果包含子结点，则设置图像格式
      If CurBookType.HaveSon(CurBookType.TypeId) = False Then
        TreeView1.SelectedItem.ExpandedImage = 4
        TreeView1.SelectedItem.Image = 4
        TreeView1.SelectedItem.SelectedImage = 5
      End If
      '读取CurBookType中的所有图书分类信息
      CurBookType.GetInfo (CurBookType.TypeId)
    End Sub
    

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