Use Scroll Bar to set rotate, X position and repaint
Imports System
Imports System.Windows.Forms
Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Drawing.Text
Imports System.Drawing.Imaging
Public Class MainClass
Shared Sub Main()
Dim form1 As Form1 = new Form1
Application.Run(form1)
End Sub
End Class
Public Class Form1
Inherits System.Windows.Forms.Form
Dim XlateY As Int32
Dim Angle As Single
Dim DrawingRect As Rectangle = New Rectangle(25, 25, 225, 225)
#Region " Windows Form Designer generated code "
Public Sub New()
MyBase.New()
'This call is required by the Windows Form Designer.
InitializeComponent()
Angle = 0
Xlatey = 0
xlate.Minimum = -50
xlate.Maximum = 50
xlate.SmallChange = 1
xlate.LargeChange = 5
xlate.Value = 0
rotate.Minimum = -180
rotate.Maximum = 180
rotate.SmallChange = 1
rotate.LargeChange = 10
rotate.Value = 0
Me.SetStyle(ControlStyles.AllPaintingInWmPaint, True)
Me.SetStyle(ControlStyles.DoubleBuffer, True)
Me.SetStyle(ControlStyles.UserPaint, True)
End Sub
'Form overrides dispose to clean up the component list.
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
'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.
Friend WithEvents xlate As System.Windows.Forms.VScrollBar
Friend WithEvents rotate As System.Windows.Forms.HScrollBar
<System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
Me.xlate = New System.Windows.Forms.VScrollBar()
Me.rotate = New System.Windows.Forms.HScrollBar()
Me.SuspendLayout()
'
'xlate
'
Me.xlate.Location = New System.Drawing.Point(264, 32)
Me.xlate.Name = "xlate"
Me.xlate.Size = New System.Drawing.Size(16, 200)
Me.xlate.TabIndex = 0
'
'rotate
'
Me.rotate.Location = New System.Drawing.Point(8, 240)
Me.rotate.Name = "rotate"
Me.rotate.Size = New System.Drawing.Size(240, 16)
Me.rotate.TabIndex = 1
'
'Form1
'
Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
Me.ClientSize = New System.Drawing.Size(292, 273)
Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.rotate, Me.xlate})
Me.MaximizeBox = False
Me.MinimizeBox = False
Me.Name = "Form1"
Me.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen
Me.Text = "Form1"
Me.ResumeLayout(False)
End Sub
#End Region
Private Sub Form1_Load(ByVal sender As System.Object, _
ByVal e As System.EventArgs) _
Handles MyBase.Load
End Sub
Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs)
Dim G As Graphics = e.Graphics
G.SmoothingMode = SmoothingMode.AntiAlias
' Create a graphics path, add a rectangle, set colors
Dim Path As New GraphicsPath()
Path.AddRectangle(New Rectangle(75, 100, 100, 75))
Dim Pts As PointF() = Path.PathPoints
Dim B As New PathGradientBrush(Pts)
'translate the brush
Dim m As New Matrix()
m.Translate(0, Xlatey, MatrixOrder.Append)
m.RotateAt(Angle, B.CenterPoint, MatrixOrder.Append)
B.MultiplyTransform(m, MatrixOrder.Append)
G.FillRectangle(B, DrawingRect)
End Sub
Private Sub xlate_Scroll(ByVal sender As System.Object, _
ByVal e As System.Windows.Forms.ScrollEventArgs) _
Handles xlate.Scroll
Xlatey = xlate.Value
Me.Invalidate(DrawingRect)
End Sub
Private Sub rotate_Scroll(ByVal sender As System.Object, _
ByVal e As System.Windows.Forms.ScrollEventArgs) _
Handles rotate.Scroll
Angle = rotate.Value
Me.Invalidate(DrawingRect)
End Sub
End Class
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