' Quote from
'Visual Basic 2005 Cookbook Solutions for VB 2005 Programmers
'by Tim Patrick (Author), John Craig (Author)
'# Publisher: O'Reilly Media, Inc. (September 21, 2006)
'# Language: English
'# ISBN-10: 0596101775
'# ISBN-13: 978-0596101770
Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class ColorRGBSH
public Shared Sub Main
Application.Run(New Form1)
End Sub
End class
Public Class Form1
Private Sub RBG_Scroll(ByVal sender As System.Object, ByVal e As System.Windows.Forms.ScrollEventArgs) _
Handles ValueRed.Scroll, ValueGreen.Scroll, ValueBlue.Scroll
Dim rgbColor As Color
rgbColor = Color.FromArgb(0, ValueRed.Value, ValueGreen.Value, ValueBlue.Value)
ValueHue.Value = CInt(rgbColor.GetHue())
ValueSaturation.Value = CInt(rgbColor.GetSaturation() * 100.0F)
ValueBrightness.Value = CInt(rgbColor.GetBrightness() * 100.0F)
RefreshDisplay()
End Sub
Private Sub ValueHue_Scroll(ByVal sender As Object, ByVal e As System.Windows.Forms.ScrollEventArgs) _
Handles ValueHue.Scroll, ValueSaturation.Scroll, ValueBrightness.Scroll
Dim useRed As Integer
Dim useGreen As Integer
Dim useBlue As Integer
Dim useHue As Single
Dim useSaturation As Single
Dim useBrightness As Single
Dim hueSector As Integer
Dim factor As Single
Dim target1 As Single
Dim target2 As Single
Dim target3 As Single
useHue = CSng(ValueHue.Value)
useSaturation = CSng(ValueSaturation.Value) / 100.0F
useBrightness = CSng(ValueBrightness.Value) / 100.0F
If (useSaturation = 0.0F) Then
useRed = CInt(useBrightness * 255)
useGreen = useRed
useBlue = useRed
Else
hueSector = CInt(useHue / 60.0F)
factor = Math.Abs((useHue / 60.0F) - CSng(hueSector))
target1 = useBrightness * (1 - useSaturation)
target2 = useBrightness * (1 - (factor * useSaturation))
target3 = useBrightness * (1 - ((1 - factor) * useSaturation))
Select Case hueSector
Case 0, 6
useRed = CInt(useBrightness * 255.0F)
useGreen = CInt(target3 * 255.0F)
useBlue = CInt(target1 * 255.0F)
Case 1
useRed = CInt(target2 * 255.0F)
useGreen = CInt(useBrightness * 255.0F)
useBlue = CInt(target1 * 255.0F)
Case 2
useRed = CInt(target1 * 255.0F)
useGreen = CInt(useBrightness * 255.0F)
useBlue = CInt(target3 * 255.0F)
Case 3
useRed = CInt(target1 * 255.0F)
useGreen = CInt(target2 * 255.0F)
useBlue = CInt(useBrightness * 255.0F)
Case 4
useRed = CInt(target3 * 255.0F)
useGreen = CInt(target1 * 255.0F)
useBlue = CInt(useBrightness * 255.0F)
Case 5
useRed = CInt(useBrightness * 255.0F)
useGreen = CInt(target1 * 255.0F)
useBlue = CInt(target2 * 255.0F)
End Select
End If
ValueRed.Value = useRed
ValueGreen.Value = useGreen
ValueBlue.Value = useBlue
RefreshDisplay()
End Sub
Private Sub RefreshDisplay()
NumberRed.Text = CStr(ValueRed.Value)
NumberGreen.Text = CStr(ValueGreen.Value)
NumberBlue.Text = CStr(ValueBlue.Value)
NumberHue.Text = CStr(ValueHue.Value)
NumberSaturation.Text = Format(CDec(ValueSaturation.Value) / 100@, "0.00")
NumberBrightness.Text = Format(CDec(ValueBrightness.Value) / 100@, "0.00")
ShowColor.BackColor = Color.FromArgb(255, ValueRed.Value, _
ValueGreen.Value, ValueBlue.Value)
End Sub
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
RBG_Scroll(ValueRed, New Windows.Forms.ScrollEventArgs(ScrollEventType.EndScroll, 0))
End Sub
End Class
<Global.Microsoft.VisualBasic.CompilerServices.DesignerGenerated()> _
Partial Class Form1
Inherits System.Windows.Forms.Form
'Form overrides dispose to clean up the component list.
<System.Diagnostics.DebuggerNonUserCode()> _
Protected Overrides Sub Dispose(ByVal disposing As Boolean)
If disposing AndAlso components IsNot Nothing Then
components.Dispose()
End If
MyBase.Dispose(disposing)
End Sub
'Required by the Windows Form Designer
Private components As System.ComponentModel.IContainer
'NOTE: The following procedure is required by the Windows Form Designer
'It can be modified using the Windows Form Designer.
'Do not modify it using the code editor.
<System.Diagnostics.DebuggerStepThrough()> _
Private Sub InitializeComponent()
Me.ShowColor = New System.Windows.Forms.PictureBox
Me.LabelRed = New System.Windows.Forms.Label
Me.ValueRed = New System.Windows.Forms.HScrollBar
Me.NumberRed = New System.Windows.Forms.Label
Me.NumberGreen = New System.Windows.Forms.Label
Me.ValueGreen = New System.Windows.Forms.HScrollBar
Me.LabelGreen = New System.Windows.Forms.Label
Me.NumberBlue = New System.Windows.Forms.Label
Me.ValueBlue = New System.Windows.Forms.HScrollBar
Me.LabelBlue = New System.Windows.Forms.Label
Me.NumberBrightness = New System.Windows.Forms.Label
Me.ValueBrightness = New System.Windows.Forms.HScrollBar
Me.LabelBrightness = New System.Windows.Forms.Label
Me.NumberSaturation = New System.Windows.Forms.Label
Me.ValueSaturation = New System.Windows.Forms.HScrollBar
Me.LabelSaturation = New System.Windows.Forms.Label
Me.NumberHue = New System.Windows.Forms.Label
Me.ValueHue = New System.Windows.Forms.HScrollBar
Me.LabelHue = New System.Windows.Forms.Label
CType(Me.ShowColor, System.ComponentModel.ISupportInitialize).BeginInit()
Me.SuspendLayout()
'
'ShowColor
'
Me.ShowColor.BackColor = System.Drawing.SystemColors.Control
Me.ShowColor.Location = New System.Drawing.Point(8, 80)
Me.ShowColor.Name = "ShowColor"
Me.ShowColor.Size = New System.Drawing.Size(336, 32)
Me.ShowColor.TabIndex = 1
Me.ShowColor.TabStop = False
'
'LabelRed
'
Me.LabelRed.AutoSize = True
Me.LabelRed.Location = New System.Drawing.Point(8, 10)
Me.LabelRed.Name = "LabelRed"
Me.LabelRed.Size = New System.Drawing.Size(27, 13)
Me.LabelRed.TabIndex = 0
Me.LabelRed.Text = "Red"
'
'ValueRed
'
Me.ValueRed.LargeChange = 1
Me.ValueRed.Location = New System.Drawing.Point(72, 8)
Me.ValueRed.Maximum = 255
Me.ValueRed.Name = "ValueRed"
Me.ValueRed.Size = New System.Drawing.Size(224, 16)
Me.ValueRed.TabIndex = 1
'
'NumberRed
'
Me.NumberRed.AutoSize = True
Me.NumberRed.Location = New System.Drawing.Point(304, 10)
Me.NumberRed.Name = "NumberRed"
Me.NumberRed.Size = New System.Drawing.Size(13, 13)
Me.NumberRed.TabIndex = 2
Me.NumberRed.Text = "0"
'
'NumberGreen
'
Me.NumberGreen.AutoSize = True
Me.NumberGreen.Location = New System.Drawing.Point(304, 34)
Me.NumberGreen.Name = "NumberGreen"
Me.NumberGreen.Size = New System.Drawing.Size(13, 13)
Me.NumberGreen.TabIndex = 5
Me.NumberGreen.Text = "0"
'
'ValueGreen
'
Me.ValueGreen.LargeChange = 1
Me.ValueGreen.Location = New System.Drawing.Point(72, 32)
Me.ValueGreen.Maximum = 255
Me.ValueGreen.Name = "ValueGreen"
Me.ValueGreen.Size = New System.Drawing.Size(224, 16)
Me.ValueGreen.TabIndex = 4
'
'LabelGreen
'
Me.LabelGreen.AutoSize = True
Me.LabelGreen.Location = New System.Drawing.Point(8, 34)
Me.LabelGreen.Name = "LabelGreen"
Me.LabelGreen.Size = New System.Drawing.Size(36, 13)
Me.LabelGreen.TabIndex = 3
Me.LabelGreen.Text = "Green"
'
'NumberBlue
'
Me.NumberBlue.AutoSize = True
Me.NumberBlue.Location = New System.Drawing.Point(304, 58)
Me.NumberBlue.Name = "NumberBlue"
Me.NumberBlue.Size = New System.Drawing.Size(13, 13)
Me.NumberBlue.TabIndex = 8
Me.NumberBlue.Text = "0"
'
'ValueBlue
'
Me.ValueBlue.LargeChange = 1
Me.ValueBlue.Location = New System.Drawing.Point(72, 56)
Me.ValueBlue.Maximum = 255
Me.ValueBlue.Name = "ValueBlue"
Me.ValueBlue.Size = New System.Drawing.Size(224, 16)
Me.ValueBlue.TabIndex = 7
'
'LabelBlue
'
Me.LabelBlue.AutoSize = True
Me.LabelBlue.Location = New System.Drawing.Point(8, 58)
Me.LabelBlue.Name = "LabelBlue"
Me.LabelBlue.Size = New System.Drawing.Size(28, 13)
Me.LabelBlue.TabIndex = 6
Me.LabelBlue.Text = "Blue"
'
'NumberBrightness
'
Me.NumberBrightness.AutoSize = True
Me.NumberBrightness.Location = New System.Drawing.Point(304, 170)
Me.NumberBrightness.Name = "NumberBrightness"
Me.NumberBrightness.Size = New System.Drawing.Size(13, 13)
Me.NumberBrightness.TabIndex = 17
Me.NumberBrightness.Text = "0"
'
'ValueBrightness
'
Me.ValueBrightness.LargeChange = 1
Me.ValueBrightness.Location = New System.Drawing.Point(72, 168)
Me.ValueBrightness.Name = "ValueBrightness"
Me.ValueBrightness.Size = New System.Drawing.Size(224, 16)
Me.ValueBrightness.TabIndex = 16
'
'LabelBrightness
'
Me.LabelBrightness.AutoSize = True
Me.LabelBrightness.Location = New System.Drawing.Point(8, 170)
Me.LabelBrightness.Name = "LabelBrightness"
Me.LabelBrightness.Size = New System.Drawing.Size(56, 13)
Me.LabelBrightness.TabIndex = 15
Me.LabelBrightness.Text = "Brightness"
'
'NumberSaturation
'
Me.NumberSaturation.AutoSize = True
Me.NumberSaturation.Location = New System.Drawing.Point(304, 146)
Me.NumberSaturation.Name = "NumberSaturation"
Me.NumberSaturation.Size = New System.Drawing.Size(13, 13)
Me.NumberSaturation.TabIndex = 14
Me.NumberSaturation.Text = "0"
'
'ValueSaturation
'
Me.ValueSaturation.LargeChange = 1
Me.ValueSaturation.Location = New System.Drawing.Point(72, 144)
Me.ValueSaturation.Name = "ValueSaturation"
Me.ValueSaturation.Size = New System.Drawing.Size(224, 16)
Me.ValueSaturation.TabIndex = 13
'
'LabelSaturation
'
Me.LabelSaturation.AutoSize = True
Me.LabelSaturation.Location = New System.Drawing.Point(8, 146)
Me.LabelSaturation.Name = "LabelSaturation"
Me.LabelSaturation.Size = New System.Drawing.Size(55, 13)
Me.LabelSaturation.TabIndex = 12
Me.LabelSaturation.Text = "Saturation"
'
'NumberHue
'
Me.NumberHue.AutoSize = True
Me.NumberHue.Location = New System.Drawing.Point(304, 122)
Me.NumberHue.Name = "NumberHue"
Me.NumberHue.Size = New System.Drawing.Size(13, 13)
Me.NumberHue.TabIndex = 11
Me.NumberHue.Text = "0"
'
'ValueHue
'
Me.ValueHue.LargeChange = 1
Me.ValueHue.Location = New System.Drawing.Point(72, 120)
Me.ValueHue.Maximum = 360
Me.ValueHue.Name = "ValueHue"
Me.ValueHue.Size = New System.Drawing.Size(224, 16)
Me.ValueHue.TabIndex = 10
'
'LabelHue
'
Me.LabelHue.AutoSize = True
Me.LabelHue.Location = New System.Drawing.Point(8, 122)
Me.LabelHue.Name = "LabelHue"
Me.LabelHue.Size = New System.Drawing.Size(27, 13)
Me.LabelHue.TabIndex = 9
Me.LabelHue.Text = "Hue"
'
'Form1
'
Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
Me.ClientSize = New System.Drawing.Size(354, 195)
Me.Controls.Add(Me.NumberBrightness)
Me.Controls.Add(Me.ValueBrightness)
Me.Controls.Add(Me.LabelBrightness)
Me.Controls.Add(Me.NumberSaturation)
Me.Controls.Add(Me.ValueSaturation)
Me.Controls.Add(Me.LabelSaturation)
Me.Controls.Add(Me.NumberHue)
Me.Controls.Add(Me.ValueHue)
Me.Controls.Add(Me.LabelHue)
Me.Controls.Add(Me.NumberBlue)
Me.Controls.Add(Me.ValueBlue)
Me.Controls.Add(Me.LabelBlue)
Me.Controls.Add(Me.NumberGreen)
Me.Controls.Add(Me.ValueGreen)
Me.Controls.Add(Me.LabelGreen)
Me.Controls.Add(Me.NumberRed)
Me.Controls.Add(Me.ValueRed)
Me.Controls.Add(Me.LabelRed)
Me.Controls.Add(Me.ShowColor)
Me.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle
Me.MaximizeBox = False
Me.Name = "Form1"
Me.Text = "RBG and HSV/HSB"
CType(Me.ShowColor, System.ComponentModel.ISupportInitialize).EndInit()
Me.ResumeLayout(False)
Me.PerformLayout()
End Sub
Friend WithEvents ShowColor As System.Windows.Forms.PictureBox
Friend WithEvents LabelRed As System.Windows.Forms.Label
Friend WithEvents ValueRed As System.Windows.Forms.HScrollBar
Friend WithEvents NumberRed As System.Windows.Forms.Label
Friend WithEvents NumberGreen As System.Windows.Forms.Label
Friend WithEvents ValueGreen As System.Windows.Forms.HScrollBar
Friend WithEvents LabelGreen As System.Windows.Forms.Label
Friend WithEvents NumberBlue As System.Windows.Forms.Label
Friend WithEvents ValueBlue As System.Windows.Forms.HScrollBar
Friend WithEvents LabelBlue As System.Windows.Forms.Label
Friend WithEvents NumberBrightness As System.Windows.Forms.Label
Friend WithEvents ValueBrightness As System.Windows.Forms.HScrollBar
Friend WithEvents LabelBrightness As System.Windows.Forms.Label
Friend WithEvents NumberSaturation As System.Windows.Forms.Label
Friend WithEvents ValueSaturation As System.Windows.Forms.HScrollBar
Friend WithEvents LabelSaturation As System.Windows.Forms.Label
Friend WithEvents NumberHue As System.Windows.Forms.Label
Friend WithEvents ValueHue As System.Windows.Forms.HScrollBar
Friend WithEvents LabelHue As System.Windows.Forms.Label
End Class
