VB.Net Tutorial/2D Graphics/Star — различия между версиями

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Текущая версия на 15:55, 26 мая 2010

Using paths to draw stars on the form

<source lang="vbnet">Imports System.Drawing Imports System.Drawing.Drawing2D Imports System.Windows.Forms public class DrawStarsForm

  public Shared Sub Main
       Application.Run(New FrmDrawStars)
  End Sub

End class Public Class FrmDrawStars

  Inherits System.Windows.Forms.Form
  1. Region " Windows Form Designer generated code "
  Public Sub New()
     MyBase.New()
     "This call is required by the Windows Form Designer.
     InitializeComponent()
     "Add any initialization after the InitializeComponent() call
  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.ruponentModel.Container
  "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()
     "
     "frmDrawStars
     "
     Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
     Me.BackColor = System.Drawing.SystemColors.ControlLight
     Me.ClientSize = New System.Drawing.Size(500, 500)
     Me.Name = "frmDrawStars"
     Me.Text = "Drawing Stars"
  End Sub
  1. End Region
  Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs)
     Dim graphicsObject As Graphics = e.Graphics
     Dim i As Integer
     Dim random As Random = New Random()
     Dim brush As SolidBrush = New SolidBrush(Color.DarkMagenta)
     Dim xPoints As Integer() = {55, 67, 109, 73, 83, 55, 27, 37, 1, 43}
     Dim yPoints As Integer() = {0, 36, 36, 54, 96, 72, 96, 54, 36, 36}
     Dim star As GraphicsPath = New GraphicsPath()
     graphicsObject.TranslateTransform(250, 250)
     For i = 0 To 8 Step 2
        star.AddLine(xPoints(i), yPoints(i), _
           xPoints(i + 1), yPoints(i + 1))
     Next
     star.CloseFigure()
     For i = 1 To 200
        graphicsObject.RotateTransform(2)
        brush.Color = Color.FromArgb(i , i , i , i )
        graphicsObject.FillPath(brush, star)
     Next
  End Sub

End Class</source>