freeHand Draw

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 dispose 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 Label1 As System.Windows.Forms.Label
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.PictureBox1 = New System.Windows.Forms.PictureBox
        Me.Label1 = New System.Windows.Forms.Label
        Me.SuspendLayout()
        '
        'PictureBox1
        '
        Me.PictureBox1.BackColor = System.Drawing.Color.FromArgb(CType(192, Byte), CType(192, Byte), CType(255, Byte))
        Me.PictureBox1.Location = New System.Drawing.Point(24, 64)
        Me.PictureBox1.Name = "PictureBox1"
        Me.PictureBox1.Size = New System.Drawing.Size(440, 232)
        Me.PictureBox1.TabIndex = 0
        Me.PictureBox1.TabStop = False
        '
        'Label1
        '
        Me.Label1.Font = New System.Drawing.Font("宋体", 12.0!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(134, Byte))
        Me.Label1.Location = New System.Drawing.Point(40, 24)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(416, 32)
        Me.Label1.TabIndex = 1
        Me.Label1.Text = "free hand Draw  By  wgscd       QQ:153964481"
        '
        'Form1
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.BackColor = System.Drawing.Color.FromArgb(CType(255, Byte), CType(224, Byte), CType(192, Byte))
        Me.ClientSize = New System.Drawing.Size(496, 334)
        Me.Controls.Add(Me.Label1)
        Me.Controls.Add(Me.PictureBox1)
        Me.Name = "Form1"
        Me.Text = "Form1"
        Me.ResumeLayout(False)

    End Sub

#End Region
 

    Dim mousePath As New System.Drawing.Drawing2D.GraphicsPath   'declare a new Graphic path to follow the mouse movement
    Dim myAlpha As Integer = 100 ' declare a Alpha variable
    Dim myUserColor As New Color   'this is a color the user selects
    Dim myPenWidth As Single = 5 'set pen width variable

    Private Sub PictureBox1_MouseDown(ByVal sender As Object, ByVal e As MouseEventArgs) Handles PictureBox1.MouseDown

        If e.Button = MouseButtons.Left Then ' draw a filled circle if left mouse is down 

            mousePath.StartFigure()   ' The L mouse is down so we need to start a new line in mousePath

        End If

    End Sub

    Private Sub PictureBox1_MouseMove(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles PictureBox1.MouseMove

        If e.Button = MouseButtons.Left Then ' draw a filled circle if left mouse is down 

            Try
                mousePath.AddLine(e.X, e.Y, e.X, e.Y)  'Add mouse coordiantes to mousePath

            Catch
                MsgBox("No way, Hose!")
            End Try

        End If

        PictureBox1.Invalidate() 'Repaint the PictureBox using the PictureBox1 Paint event

    End Sub

    Private Sub PictureBox1_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles PictureBox1.Paint

        Try

            myUserColor = (System.Drawing.Color.Black)
            myAlpha = 100

            Dim CurrentPen = New Pen(Color.FromArgb(myAlpha, myUserColor), myPenWidth) 'Set up the pen

            e.Graphics.DrawPath(CurrentPen, mousePath)  'draw the path! :)

        Catch
            ' MsgBox("Not happening!")
        End Try

    End Sub

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

    End Sub
End Class