form1.vb

苏金明编写的《用VB.NET和VC#.NET开发交互式CAD系统》一书的源代码

Imports System.Drawing.Drawing2D

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 PictureBox1 As System.Windows.Forms.PictureBox
    Friend WithEvents Button1 As System.Windows.Forms.Button
    Friend WithEvents Button2 As System.Windows.Forms.Button
    Friend WithEvents Button3 As System.Windows.Forms.Button
    Friend WithEvents Button4 As System.Windows.Forms.Button
    Friend WithEvents Button5 As System.Windows.Forms.Button
    Friend WithEvents Button6 As System.Windows.Forms.Button
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.PictureBox1 = New System.Windows.Forms.PictureBox()
        Me.Button1 = New System.Windows.Forms.Button()
        Me.Button2 = New System.Windows.Forms.Button()
        Me.Button3 = New System.Windows.Forms.Button()
        Me.Button4 = New System.Windows.Forms.Button()
        Me.Button5 = New System.Windows.Forms.Button()
        Me.Button6 = New System.Windows.Forms.Button()
        Me.SuspendLayout()
        '
        'PictureBox1
        '
        Me.PictureBox1.BackColor = System.Drawing.Color.White
        Me.PictureBox1.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D
        Me.PictureBox1.Location = New System.Drawing.Point(8, 8)
        Me.PictureBox1.Name = "PictureBox1"
        Me.PictureBox1.Size = New System.Drawing.Size(408, 376)
        Me.PictureBox1.TabIndex = 0
        Me.PictureBox1.TabStop = False
        '
        'Button1
        '
        Me.Button1.Location = New System.Drawing.Point(432, 24)
        Me.Button1.Name = "Button1"
        Me.Button1.Size = New System.Drawing.Size(64, 24)
        Me.Button1.TabIndex = 1
        Me.Button1.Text = "左  移"
        '
        'Button2
        '
        Me.Button2.Location = New System.Drawing.Point(432, 120)
        Me.Button2.Name = "Button2"
        Me.Button2.Size = New System.Drawing.Size(64, 24)
        Me.Button2.TabIndex = 2
        Me.Button2.Text = "旋  转"
        '
        'Button3
        '
        Me.Button3.Location = New System.Drawing.Point(432, 72)
        Me.Button3.Name = "Button3"
        Me.Button3.Size = New System.Drawing.Size(64, 24)
        Me.Button3.TabIndex = 3
        Me.Button3.Text = "右　移"
        '
        'Button4
        '
        Me.Button4.Location = New System.Drawing.Point(432, 168)
        Me.Button4.Name = "Button4"
        Me.Button4.Size = New System.Drawing.Size(64, 24)
        Me.Button4.TabIndex = 4
        Me.Button4.Text = "放  大"
        '
        'Button5
        '
        Me.Button5.Location = New System.Drawing.Point(432, 216)
        Me.Button5.Name = "Button5"
        Me.Button5.Size = New System.Drawing.Size(64, 24)
        Me.Button5.TabIndex = 5
        Me.Button5.Text = "缩  小"
        '
        'Button6
        '
        Me.Button6.Location = New System.Drawing.Point(432, 264)
        Me.Button6.Name = "Button6"
        Me.Button6.Size = New System.Drawing.Size(64, 24)
        Me.Button6.TabIndex = 6
        Me.Button6.Text = "取  消"
        '
        'Form1
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.BackColor = System.Drawing.Color.LightGray
        Me.ClientSize = New System.Drawing.Size(512, 390)
        Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.Button6, Me.Button5, Me.Button4, Me.Button3, Me.Button2, Me.Button1, Me.PictureBox1})
        Me.Name = "Form1"
        Me.Text = "几何变换"
        Me.ResumeLayout(False)

    End Sub

#End Region

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        '左移
        g = PictureBox1.CreateGraphics()
        g.Clear(Color.White)
        g.TranslateTransform(-50, 0)
        Draw(g)
    End Sub


    Private Sub PictureBox1_Paint(ByVal sender As Object, ByVal e As Windows.Forms.PaintEventArgs) Handles PictureBox1.Paint
        g = e.Graphics
        Draw(g)
    End Sub

    Private Sub Draw(ByVal g As Graphics)
        '绘图
        g.DrawLine(Pens.Black, 10, 10, 100, 100)
        g.DrawEllipse(Pens.Black, 50, 50, 200, 100)
        g.DrawArc(Pens.Black, 100, 10, 100, 100, 20, 160)
        g.FillRectangle(Brushes.Green, 50, 200, 150, 100)
    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        '旋转
        g = PictureBox1.CreateGraphics()
        g.Clear(Color.White)
        g.RotateTransform(-30)
        Draw(g)
    End Sub


    Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button4.Click
        '放大
        g = PictureBox1.CreateGraphics()
        g.Clear(Color.White)
        g.ScaleTransform(1.5, 1.5)
        Draw(g)
    End Sub

    Private Sub Button5_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button5.Click
        '缩小
        g = PictureBox1.CreateGraphics()
        g.Clear(Color.White)
        g.ScaleTransform(0.8, 0.8)
        Draw(g)
    End Sub

    Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
        '右移
        Dim g As Graphics = PictureBox1.CreateGraphics()
        g.Clear(Color.White)
        g.TranslateTransform(50, 0)
        Draw(g)
    End Sub

    Private Sub Button6_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button6.Click
        '取消运行
        End
    End Sub
End Class