GDI+ Coordinate System : Coordinate « 2D Graphics « VB.Net Tutorial






GDI+ Coordinate System
Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms

public class GDICoordinateSystem
   public Shared Sub Main
        Application.Run(New Form1)
   End Sub
End class

public class Form1
  Inherits System.Windows.Forms.Form

  Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs)
        Dim g As Graphics = e.Graphics
        g.TranslateTransform(50, 40)

        Dim vertFont As New Font("Verdana", 10, FontStyle.Regular)
        Dim horzFont As New Font("Verdana", 10, FontStyle.Regular)
        Dim blackBrush As New SolidBrush(Color.Black)
        Dim blackPen As New Pen(Color.Black, 1)
        Dim bluePen As New Pen(Color.Blue, 1)


        ' Page Coordinate ***** 
        'X axis drawing
        g.DrawString("200", horzFont, blackBrush, 200, 5)
        g.DrawString("100", horzFont, blackBrush, 100, 5)
        g.DrawString("X", horzFont, blackBrush, 250, 0)
        ' Drawing vertical strings
        Dim vertStrFormat As New StringFormat
        vertStrFormat.FormatFlags = StringFormatFlags.DirectionVertical
        'Y axis drawing
        g.DrawString("100", vertFont, blackBrush, 0, 100)
        g.DrawString("200", vertFont, blackBrush, 0, 200)
        g.DrawString("Y", vertFont, blackBrush, 0, 250)
        ' Drawing a vertical and a horizontal line
        g.DrawLine(blackPen, 0, 0, 0, 250)
        g.DrawLine(blackPen, 0, 0, 250, 0)

        Dim A As New Point(0, 0)
        Dim B As New Point(120, 80)
        g.DrawLine(Pens.Black, A, B)
  End Sub

  Public Sub New()
   
    MyBase.New()
    Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
    Me.ClientSize = New System.Drawing.Size(292, 273)
    Me.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen

  End Sub

End Class








17.2.Coordinate
17.2.1.Draw CoordinateDraw Coordinate
17.2.2.GDI+ Coordinate SystemGDI+ Coordinate System
17.2.3.Draw line using integer coordinatesDraw line using integer coordinates
17.2.4.Draw line using float coordinatesDraw line using float coordinates