drawmain.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
Imports System.Runtime.Serialization.Formatters.Binary
Imports System.Xml.Serialization
Imports System.Collections
Imports System.IO

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 MainMenu1 As System.Windows.Forms.MainMenu
    Friend WithEvents mnuDraw As System.Windows.Forms.MenuItem
    Friend WithEvents mnuLine As System.Windows.Forms.MenuItem
    Friend WithEvents mnuCircle As System.Windows.Forms.MenuItem
    Friend WithEvents mnuArc As System.Windows.Forms.MenuItem
    Friend WithEvents mnuText As System.Windows.Forms.MenuItem
    Friend WithEvents mnuRect As System.Windows.Forms.MenuItem
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.MainMenu1 = New System.Windows.Forms.MainMenu()
        Me.mnuDraw = New System.Windows.Forms.MenuItem()
        Me.mnuLine = New System.Windows.Forms.MenuItem()
        Me.mnuRect = New System.Windows.Forms.MenuItem()
        Me.mnuCircle = New System.Windows.Forms.MenuItem()
        Me.mnuArc = New System.Windows.Forms.MenuItem()
        Me.mnuText = New System.Windows.Forms.MenuItem()
        '
        'MainMenu1
        '
        Me.MainMenu1.MenuItems.AddRange(New System.Windows.Forms.MenuItem() {Me.mnuDraw})
        '
        'mnuDraw
        '
        Me.mnuDraw.Index = 0
        Me.mnuDraw.MenuItems.AddRange(New System.Windows.Forms.MenuItem() {Me.mnuLine, Me.mnuRect, Me.mnuCircle, Me.mnuArc, Me.mnuText})
        Me.mnuDraw.Text = "绘图"
        '
        'mnuLine
        '
        Me.mnuLine.Index = 0
        Me.mnuLine.Text = "直线段"
        '
        'mnuRect
        '
        Me.mnuRect.Index = 1
        Me.mnuRect.Text = "矩形"
        '
        'mnuCircle
        '
        Me.mnuCircle.Index = 2
        Me.mnuCircle.Text = "圆"
        '
        'mnuArc
        '
        Me.mnuArc.Index = 3
        Me.mnuArc.Text = "圆弧"
        '
        'mnuText
        '
        Me.mnuText.Index = 4
        Me.mnuText.Text = "文本"
        '
        'Form1
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.BackColor = System.Drawing.Color.White
        Me.ClientSize = New System.Drawing.Size(552, 385)
        Me.Menu = Me.MainMenu1
        Me.Name = "Form1"
        Me.Text = "NET_CAD"
        Me.WindowState = System.Windows.Forms.FormWindowState.Maximized

    End Sub

#End Region


    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Dim g As Graphics = Me.CreateGraphics()
        g.FillRectangle(Brushes.White, Me.ClientRectangle)

        g.PageUnit = GraphicsUnit.Pixel

        '相对于Ｘ轴进行镜像变换
        Dim mat As New Matrix(1, 0, 0, -1, 0, 0)
        g.Transform = mat
        Dim rect As Rectangle = Me.ClientRectangle
        Dim w As Integer = rect.Width
        Dim h As Integer = rect.Height
        viewDX = rect.Width / 2
        viewDY = rect.Height / 2
        Dim pLT As New PointF()
        Dim pRB As New PointF()
        With pLT
            .X = rect.Left
            .Y = rect.Top
        End With
        With pRB
            .X = rect.Right
            .Y = rect.Bottom
        End With
        viewLT = PagetoWorld(pLT)
        viewRB = PagetoWorld(pRB)

        Coordinate(g)

        aCommand = creLine
    End Sub

    Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs)
        Dim g As Graphics = e.Graphics
        DrawAll(g)
        DrawSel(g)
    End Sub

    Protected Overrides Sub OnMouseDown(ByVal e As MouseEventArgs)
        Dim g As Graphics = Me.CreateGraphics()
        Dim aPos As PointF = PagetoWorld(New PointF(e.X, e.Y))
        If e.Button = MouseButtons.Left Then
            aCommand.LButtonDown(g, aPos)

        ElseIf e.Button = MouseButtons.Right Then
            aCommand.RButtonDown(g, aPos)
        End If
    End Sub

    Protected Overrides Sub OnMouseMove(ByVal e As MouseEventArgs)
        Dim g As Graphics = Me.CreateGraphics()
        Dim aPos As PointF = PagetoWorld(New PointF(e.X, e.Y))
        aCommand.MouseMove(g, aPos)
    End Sub

    Private Sub mnuLine_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles mnuLine.Click
        aCommand = creLine
    End Sub

    Private Sub mnuCircle_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles mnuCircle.Click
        aCommand = creCircle
    End Sub

    Private Sub mnuArc_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles mnuArc.Click
        aCommand = creArc
    End Sub

    Private Sub mnuText_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles mnuText.Click
        aCommand = creText
    End Sub

    Private Sub mnuRect_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles mnuRect.Click
        aCommand = creRectangle
    End Sub

    Protected Overrides Sub Finalize()
        MyBase.Finalize()
    End Sub


End Class