form1.vb

Source code for VB.NET book - Chapter 4

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
    Friend WithEvents Label2 As System.Windows.Forms.Label
    Friend WithEvents Label3 As System.Windows.Forms.Label
    Friend WithEvents TextBox1 As System.Windows.Forms.TextBox
    Friend WithEvents TextBox2 As System.Windows.Forms.TextBox
    Friend WithEvents TextBox3 As System.Windows.Forms.TextBox
    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 OpenFileDialog1 As System.Windows.Forms.OpenFileDialog
    Friend WithEvents Label4 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.Label2 = New System.Windows.Forms.Label
        Me.Label3 = New System.Windows.Forms.Label
        Me.TextBox1 = New System.Windows.Forms.TextBox
        Me.TextBox2 = New System.Windows.Forms.TextBox
        Me.TextBox3 = New System.Windows.Forms.TextBox
        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.OpenFileDialog1 = New System.Windows.Forms.OpenFileDialog
        Me.Label4 = New System.Windows.Forms.Label
        Me.SuspendLayout()
        '
        'PictureBox1
        '
        Me.PictureBox1.BackColor = System.Drawing.SystemColors.Window
        Me.PictureBox1.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D
        Me.PictureBox1.Dock = System.Windows.Forms.DockStyle.Top
        Me.PictureBox1.Location = New System.Drawing.Point(0, 0)
        Me.PictureBox1.Name = "PictureBox1"
        Me.PictureBox1.Size = New System.Drawing.Size(336, 152)
        Me.PictureBox1.TabIndex = 0
        Me.PictureBox1.TabStop = False
        '
        'Label1
        '
        Me.Label1.Location = New System.Drawing.Point(56, 160)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(32, 24)
        Me.Label1.TabIndex = 1
        Me.Label1.Text = "R值"
        '
        'Label2
        '
        Me.Label2.Location = New System.Drawing.Point(56, 192)
        Me.Label2.Name = "Label2"
        Me.Label2.Size = New System.Drawing.Size(32, 24)
        Me.Label2.TabIndex = 2
        Me.Label2.Text = "G值"
        '
        'Label3
        '
        Me.Label3.Location = New System.Drawing.Point(56, 224)
        Me.Label3.Name = "Label3"
        Me.Label3.Size = New System.Drawing.Size(32, 24)
        Me.Label3.TabIndex = 3
        Me.Label3.Text = "B值"
        '
        'TextBox1
        '
        Me.TextBox1.Location = New System.Drawing.Point(104, 160)
        Me.TextBox1.Name = "TextBox1"
        Me.TextBox1.Size = New System.Drawing.Size(64, 20)
        Me.TextBox1.TabIndex = 4
        Me.TextBox1.Text = ""
        '
        'TextBox2
        '
        Me.TextBox2.Location = New System.Drawing.Point(104, 192)
        Me.TextBox2.Name = "TextBox2"
        Me.TextBox2.Size = New System.Drawing.Size(64, 20)
        Me.TextBox2.TabIndex = 5
        Me.TextBox2.Text = ""
        '
        'TextBox3
        '
        Me.TextBox3.Location = New System.Drawing.Point(104, 224)
        Me.TextBox3.Name = "TextBox3"
        Me.TextBox3.Size = New System.Drawing.Size(64, 20)
        Me.TextBox3.TabIndex = 6
        Me.TextBox3.Text = ""
        '
        'Button1
        '
        Me.Button1.Location = New System.Drawing.Point(184, 160)
        Me.Button1.Name = "Button1"
        Me.Button1.Size = New System.Drawing.Size(56, 24)
        Me.Button1.TabIndex = 7
        Me.Button1.Text = "应  用"
        '
        'Button2
        '
        Me.Button2.Location = New System.Drawing.Point(184, 200)
        Me.Button2.Name = "Button2"
        Me.Button2.Size = New System.Drawing.Size(56, 24)
        Me.Button2.TabIndex = 8
        Me.Button2.Text = "复  位"
        '
        'Button3
        '
        Me.Button3.Location = New System.Drawing.Point(256, 160)
        Me.Button3.Name = "Button3"
        Me.Button3.Size = New System.Drawing.Size(64, 24)
        Me.Button3.TabIndex = 9
        Me.Button3.Text = "打开文件"
        '
        'Button4
        '
        Me.Button4.Location = New System.Drawing.Point(256, 200)
        Me.Button4.Name = "Button4"
        Me.Button4.Size = New System.Drawing.Size(64, 24)
        Me.Button4.TabIndex = 10
        Me.Button4.Text = "退  出"
        '
        'Label4
        '
        Me.Label4.Location = New System.Drawing.Point(8, 160)
        Me.Label4.Name = "Label4"
        Me.Label4.Size = New System.Drawing.Size(40, 72)
        Me.Label4.TabIndex = 11
        Me.Label4.Text = "要增加的RGB值"
        '
        'Form1
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
        Me.ClientSize = New System.Drawing.Size(336, 254)
        Me.Controls.Add(Me.Label4)
        Me.Controls.Add(Me.Button4)
        Me.Controls.Add(Me.Button3)
        Me.Controls.Add(Me.Button2)
        Me.Controls.Add(Me.Button1)
        Me.Controls.Add(Me.TextBox3)
        Me.Controls.Add(Me.TextBox2)
        Me.Controls.Add(Me.TextBox1)
        Me.Controls.Add(Me.Label3)
        Me.Controls.Add(Me.Label2)
        Me.Controls.Add(Me.Label1)
        Me.Controls.Add(Me.PictureBox1)
        Me.Name = "Form1"
        Me.Text = "调节色彩"
        Me.ResumeLayout(False)

    End Sub

#End Region
    Dim c, cc As System.Drawing.Color
    Dim r, g, b, r1, g1, b1 As Integer
    Dim pic1, pic2 As Bitmap
    Dim xwidth, yheight As Integer
    Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
        OpenFileDialog1.ShowDialog()
        pic1 = New Bitmap(OpenFileDialog1.FileName)
        pic2 = pic1.Clone
        xwidth = pic1.Width
        yheight = pic1.Height
        PictureBox1.Image = pic1
    End Sub

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim x, y, z As Integer
        Dim i, j As Integer
        pic1 = PictureBox1.Image
        x = CInt(TextBox1.Text)
        y = CInt(TextBox2.Text)
        z = CInt(TextBox3.Text)
        For i = 0 To xwidth - 1
            For j = 0 To yheight - 1
                c = pic1.GetPixel(i, j)
                r = c.R
                g = c.G
                b = c.B
                r1 = r + x
                g1 = g + y
                b1 = b + z
                If r1 < 0 Then r1 = 0
                If r1 > 255 Then r1 = 255
                If g1 < 0 Then g1 = 0
                If g1 > 255 Then g1 = 255
                If b1 < 0 Then b1 = 0
                If b1 > 255 Then b1 = 255
                c = c.FromArgb(r1, g1, b1)
                pic1.SetPixel(i, j, c)
            Next
            PictureBox1.Refresh()
        Next
    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        PictureBox1.Image = Nothing
        PictureBox1.Image = pic2
    End Sub

    Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button4.Click
        End
    End Sub
End Class