frmtip.frm

图书管理系统需求规格说明书.doc

VERSION 5.00
Begin VB.Form frmTip 
   Caption         =   "地大图书馆欢迎您！"
   ClientHeight    =   3285
   ClientLeft      =   2370
   ClientTop       =   2400
   ClientWidth     =   5415
   Icon            =   "frmTip.frx":0000
   LinkTopic       =   "Form1"
   MaxButton       =   0   'False
   MinButton       =   0   'False
   ScaleHeight     =   3285
   ScaleWidth      =   5415
   ShowInTaskbar   =   0   'False
   StartUpPosition =   2  '屏幕中心
   WhatsThisHelp   =   -1  'True
   Begin VB.CheckBox chkLoadTipsAtStartup 
      Caption         =   "系统启动时显示(&S)"
      Height          =   315
      Left            =   120
      TabIndex        =   3
      Top             =   2940
      Width           =   2295
   End
   Begin VB.CommandButton cmdNextTip 
      Caption         =   "下一条(&N)"
      Height          =   375
      Left            =   4080
      TabIndex        =   2
      Top             =   600
      Width           =   1215
   End
   Begin VB.PictureBox Picture1 
      BackColor       =   &H00FFFFFF&
      Height          =   2715
      Left            =   120
      ScaleHeight     =   2655
      ScaleWidth      =   3675
      TabIndex        =   1
      Top             =   120
      Width           =   3735
      Begin VB.Label Label1 
         BackColor       =   &H00FFFFFF&
         Caption         =   "     中国地质大学       图书馆管理系统"
         BeginProperty Font 
            Name            =   "楷体_GB2312"
            Size            =   14.25
            Charset         =   134
            Weight          =   700
            Underline       =   0   'False
            Italic          =   0   'False
            Strikethrough   =   0   'False
         EndProperty
         ForeColor       =   &H00FF0000&
         Height          =   615
         Left            =   120
         TabIndex        =   5
         Top             =   0
         Width           =   3135
      End
      Begin VB.Label lblTipText 
         BackColor       =   &H00FFFFFF&
         BeginProperty Font 
            Name            =   "新宋体"
            Size            =   12
            Charset         =   0
            Weight          =   400
            Underline       =   0   'False
            Italic          =   0   'False
            Strikethrough   =   0   'False
         EndProperty
         ForeColor       =   &H00800000&
         Height          =   1635
         Left            =   180
         TabIndex        =   4
         Top             =   840
         Width           =   3255
      End
   End
   Begin VB.CommandButton cmdOK 
      Cancel          =   -1  'True
      Caption         =   "确定"
      Default         =   -1  'True
      Height          =   375
      Left            =   4080
      TabIndex        =   0
      Top             =   120
      Width           =   1215
   End
End
Attribute VB_Name = "frmTip"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False


Option Explicit

Dim Tips As New Collection

'Tip文件的名字
Const TIP_FILE = "TIPOFDAY.TXT"

Dim CurrentTip As Long


Private Sub DoNextTip()
On Error Resume Next
    ' 随即选择一个tip
    CurrentTip = Int((Tips.Count * Rnd) + 1)
    frmTip.DisplayCurrentTip
    
End Sub

Function LoadTips(sFile As String) As Boolean
On Error Resume Next
    Dim NextTip As String
    Dim InFile As Integer
    
    ' 获得下一个文件描述符
    InFile = FreeFile
    
    ' 确定文件被明确指定
    If sFile = "" Then
        LoadTips = False
        Exit Function
    End If
    
    ' 确定文件存在
    If Dir(sFile) = "" Then
        LoadTips = False
        Exit Function
    End If
    
    ' 读取tip
    Open sFile For Input As InFile
    While Not EOF(InFile)
        Line Input #InFile, NextTip
        Tips.Add NextTip
    Wend
    Close InFile

    '显示tip
    DoNextTip
    
    LoadTips = True
    
End Function

Private Sub chkLoadTipsAtStartup_Click()
On Error Resume Next
    ' 是否在启动时开启tip
    SaveSetting App.EXEName, "Options", "Show Tips at Startup", chkLoadTipsAtStartup.value
End Sub

Private Sub cmdNextTip_Click()
On Error Resume Next
    DoNextTip
End Sub

Private Sub cmdOK_Click()
On Error Resume Next
    Unload Me
End Sub

Private Sub Form_Load()
On Error Resume Next
    DoEvents
    Dim ShowAtStartup As Long
    
    ' 提取是否在启动时开启tip
    ShowAtStartup = GetSetting(App.EXEName, "Options", "Show Tips at Startup", 1)
    If ShowAtStartup = 0 Then
        Unload Me
        Exit Sub
    End If
        
    ' 重写是否在启动时开启tip
    Me.chkLoadTipsAtStartup.value = vbChecked
    
   
    Randomize
    
    '如果未找到tip文件
    If LoadTips(App.Path & "\" & TIP_FILE) = False Then
        lblTipText.Caption = TIP_FILE & " 文件未找到！ " & vbCrLf & vbCrLf & _
           "用记事本创建一个名为 " & TIP_FILE & " 的文件。一行写一条tip. " & _
           "把它放在本程序目录中。 "
    End If

    
End Sub

Public Sub DisplayCurrentTip()
On Error Resume Next
    If Tips.Count > 0 Then
        lblTipText.Caption = Tips.Item(CurrentTip)
    End If
End Sub