form1.vb

编程之道VB.NETt程序设计入门-589M.zip

Public Class Form1
    Inherits System.Windows.Forms.Form

#Region " Windows 窗体设计器生成的代码 "

    Public Sub New()
        MyBase.New()

        '该调用是 Windows 窗体设计器所必需的。
        InitializeComponent()

        '在 InitializeComponent() 调用之后添加任何初始化

    End Sub

    '窗体重写处置以清理组件列表。
    Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing Then
            If Not (components Is Nothing) Then
                components.Dispose()
            End If
        End If
        MyBase.Dispose(disposing)
    End Sub

    'Windows 窗体设计器所必需的
    Private components As System.ComponentModel.IContainer

    '注意：以下过程是 Windows 窗体设计器所必需的
    '可以使用 Windows 窗体设计器修改此过程。
    '不要使用代码编辑器修改它。
    Friend WithEvents tmrAnimation As System.Windows.Forms.Timer
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.components = New System.ComponentModel.Container()
        Me.tmrAnimation = New System.Windows.Forms.Timer(Me.components)
        '
        'tmrAnimation
        '
        Me.tmrAnimation.Enabled = True
        '
        'Form1
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.ClientSize = New System.Drawing.Size(292, 266)
        Me.Name = "Form1"
        Me.Text = "Form1"

    End Sub

#End Region

    Dim arrImages(4) As Bitmap
    Dim iCurImage, j As Integer

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        iCurImage = 0

        '装入4幅“眨眼”图片
        arrImages(0) = New Bitmap("..\Eye1.png")
        arrImages(1) = New Bitmap("..\Eye2.png")
        arrImages(2) = New Bitmap("..\Eye3.png")
        arrImages(3) = New Bitmap("..\Eye4.png")
    End Sub

    Private Sub tmrAnimation_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles tmrAnimation.Tick
        Dim g As Graphics = CreateGraphics()

        '把4幅图片中的一幅画到窗体上
        g.DrawImage(arrImages(iCurImage), _
            CInt((ClientSize.Width - arrImages(iCurImage).Width) / 2), _
            CInt((ClientSize.Height - arrImages(iCurImage).Height) / 2), _
            arrImages(iCurImage).Width, _
            arrImages(iCurImage).Height)
        g.Dispose()

        '在4幅图片中循环
        iCurImage += j
        If iCurImage = 3 Then
            '如果到了最后一幅，就开始倒放
            j = -1
        ElseIf iCurImage = 0 Then
            '到了第一幅，开始正放
            j = 1
        End If

    End Sub
End Class