VB.Net/2D/Line — различия между версиями
Admin (обсуждение | вклад) м (1 версия) |
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(нет различий)
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Текущая версия на 15:41, 26 мая 2010
Содержание
Draw Colorful Line and Dash Line
<source lang="vbnet"> Imports System Imports System.Drawing Imports System.Drawing.Drawing2D Imports System.Windows.Forms Imports System.Drawing.Text Public Class MainClass
Shared Sub Main() Dim myform As Form = New FrmDrawShapes() Application.Run(myform) End Sub " Main
End Class
Public Class FrmDrawShapes
Inherits System.Windows.Forms.Form
- 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() " "frmDrawShapes " Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13) Me.ClientSize = New System.Drawing.Size(520, 197) Me.Name = "frmDrawShapes" Me.Text = "Drawing Shapes" End Sub
- End Region
" draw various shapes on form Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs) Dim graphicsObject As Graphics = e.Graphics " bitmap texture Dim textureBitmap As Bitmap = New Bitmap(10, 10) Dim graphicsObject2 As Graphics = _ Graphics.FromImage(textureBitmap) " get bitmap graphics " brush and pen used throughout program Dim solidColorBrush As SolidBrush = _ New SolidBrush(Color.Red) Dim coloredPen As Pen = New Pen(solidColorBrush) " draw pie-shaped arc in white coloredPen.Color = Color.White coloredPen.Width = 6 graphicsObject.DrawPie(coloredPen, 240, 30, 75, 100, 0, 270) " draw lines in green and yellow coloredPen.Color = Color.Green coloredPen.Width = 5 graphicsObject.DrawLine(coloredPen, 395, 30, 320, 150) " draw a rounded, dashed yellow line coloredPen.Color = Color.Yellow coloredPen.DashCap = LineCap.Round coloredPen.DashStyle = DashStyle.Dash graphicsObject.DrawLine(coloredPen, 320, 30, 395, 150) End Sub " OnPaint
End Class
</source>
Draw lines to connect rectangles
<source lang="vbnet"> Imports System Imports System.Drawing Imports System.Windows.Forms Imports System.Drawing.Text Public Class MainClass
Shared Sub Main() Dim myform As Form = New FrmDrawing() Application.Run(myform) End Sub " Main
End Class
Public Class FrmDrawing
Inherits System.Windows.Forms.Form
- 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() " "frmDrawing " Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13) Me.BackColor = System.Drawing.SystemColors.AppWorkspace Me.ClientSize = New System.Drawing.Size(472, 157) Me.Name = "frmDrawing" Me.Text = "Drawing lines, rectangles and ovals" End Sub
- End Region
" display ovals lines, and rectangles Protected Overrides Sub OnPaint( _ ByVal paintEvent As PaintEventArgs) " get graphics object Dim g As Graphics = paintEvent.Graphics Dim brush As SolidBrush = New SolidBrush(Color.Blue) Dim pen As Pen = New Pen(Color.AliceBlue) " draw lines to connect rectangles g.DrawLine(pen, 90, 30, 110, 40) g.DrawLine(pen, 90, 120, 110, 130) g.DrawLine(pen, 240, 30, 260, 40) g.DrawLine(pen, 240, 120, 260, 130)
" draw top rectangle g.DrawRectangle(pen, 110, 40, 150, 90) End Sub " OnPaint
End Class " FrmDrawing
</source>
Paint Lines
<source lang="vbnet"> Imports System Imports System.Drawing Imports System.Drawing.Printing Imports System.Collections Imports System.ruponentModel Imports System.Windows.Forms Imports System.Drawing.Drawing2D Class MyFirstForm
Inherits Form
Public Sub Draw(ByVal g As Graphics) g.SmoothingMode = SmoothingMode.AntiAlias Dim rect As Rectangle = Me.ClientRectangle Dim cx As Integer = rect.Width Dim cy As Integer = rect.Height Dim scale As Single = CSng(cy) / CSng(cx) Dim _brush As LinearGradientBrush = New LinearGradientBrush(Me.ClientRectangle, Color.Empty, Color.Empty, 45) Dim blend As ColorBlend = New ColorBlend() blend.Colors = New Color() {Color.Red, Color.Green, Color.Blue} blend.Positions = New Single() {0.0, 0.5, 1.0} _brush.InterpolationColors = blend Dim _pen As Pen = New Pen(_brush) Dim x As Integer For x = 0 To cx Step 7 g.DrawLine(_pen, 0, x * scale, cx - x, 0) g.DrawLine(_pen, 0, (cx - x) * scale, cx - x, cx * scale) g.DrawLine(_pen, cx - x, 0 * scale, cx, (cx - x) * scale) g.DrawLine(_pen, cx - x, cx * scale, cx, x * scale) Next Dim format As StringFormat = New StringFormat() format.Alignment = StringAlignment.Center format.LineAlignment = StringAlignment.Center Dim s As String = "Ain"t graphics cool?" g.DrawString(s, Me.Font, _brush, rect.X, rect.Y, format) End Sub Private Sub MyPaint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles MyBase.Paint Dim g As Graphics = e.Graphics Draw(g) End Sub Shared Sub Main() Dim myform As Form = New MyFirstForm() Application.Run(myform) End Sub
End Class
</source>
Use Texture Brush to Draw a Line
<source lang="vbnet"> Imports System Imports System.Windows.Forms Imports System.Drawing Imports System.Drawing.Drawing2D Imports System.Drawing.Text
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
- 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.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.SuspendLayout() " "Form1 " Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13) Me.ClientSize = New System.Drawing.Size(392, 213) Me.Controls.AddRange(New System.Windows.Forms.Control() {}) Me.Name = "Form1" 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 Dim P1 As Pen = New Pen(Color.Blue, 10) "pentype Dim P3 As Pen = New Pen(Color.Blue, 10) P3.Brush = New TextureBrush(New Bitmap("figure2.bmp")) G.DrawLine(P3, 20, CInt(Me.Height / 2), Me.Width - 20, CInt(Me.Height / 2)) End Sub
End Class
</source>