VB.Net Tutorial/2D Graphics/TextureBrush — различия между версиями
Admin (обсуждение | вклад) м (1 версия) |
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(нет различий)
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Версия 19:40, 26 мая 2010
Содержание
Create TextureBrush from Bitmap
<source lang="vbnet">Imports System Imports System.Drawing Imports System.Drawing.Drawing2D Imports System.Collections Imports System.ruponentModel Imports System.Windows.Forms Imports System.Data public class TextureBrushCreateFromBitmap
public Shared Sub Main Application.Run(New BrushesForm) End Sub
End class Public Class BrushesForm
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() " "BrushesForm " Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13) Me.ClientSize = New System.Drawing.Size(292, 266) Me.Name = "BrushesForm" Me.Text = "Form1" End Sub
- End Region
Enum LinearGradientMode BackwardDiagonal ForwardDiagonal Horizontal Vertical End Enum Private Sub BrushesForm_Paint(ByVal sender As Object, ByVal e As PaintEventArgs) Handles MyBase.Paint Dim g As Graphics = e.Graphics Dim width As Integer = Me.ClientRectangle.Width Dim height As Integer = Me.ClientRectangle.Height / 5 Dim whiteBrush As Brush = System.Drawing.Brushes.White Dim blackBrush As Brush = System.Drawing.Brushes.Black Dim b As Brush Dim file As String = "YourFile.jpg" b = New TextureBrush(New Bitmap(file)) g.FillRectangle(b, 0, 0, width, height) g.DrawString(b.ToString(), Me.Font, whiteBrush, 0, 0) End Sub
End Class</source>
Create textured brush and display textured rectangle
<source lang="vbnet">Imports System.Drawing Imports System.Drawing.Drawing2D Imports System.Windows.Forms public class TexturePaintDemo
public Shared Sub Main Application.Run(New FrmDrawShapes) End Sub
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
Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs) Dim graphicsObject As Graphics = e.Graphics
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)
solidColorBrush.Color = Color.Yellow graphicsObject2.FillRectangle(solidColorBrush, 0, 0, 10, 10) coloredPen.Color = Color.Black graphicsObject2.DrawRectangle(coloredPen, 1, 1, 6, 6) solidColorBrush.Color = Color.Blue graphicsObject2.FillRectangle(solidColorBrush, 1, 1, 3, 3) solidColorBrush.Color = Color.Red graphicsObject2.FillRectangle(solidColorBrush, 4, 4, 3, 3) Dim texturedBrush As TextureBrush = _ New TextureBrush(textureBitmap) graphicsObject.FillRectangle(texturedBrush, 155, 30, 75, 100) End Sub
End Class</source>
Generate points to draw a star shape
<source lang="vbnet">Imports System.Drawing Imports System.Drawing.Drawing2D Imports System.Windows.Forms Imports System.Math public class DrawAStarShape
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 cx As Integer = Me.ClientSize.Width \ 2 Dim cy As Integer = Me.ClientSize.Height \ 2 Dim r1 As Integer = Min(cx, cy) - 10 Dim r2 As Integer = Min(cx, cy) \ 2 Dim pts(9) As Point For i As Integer = 0 To 9 Step 2 pts(i).X = cx + CInt(r1 * Cos(i * PI / 5 - PI / 2)) pts(i).Y = cy + CInt(r1 * Sin(i * PI / 5 - PI / 2)) pts(i + 1).X = cx + CInt(r2 * Cos((i + 1) * PI / 5 - PI / 2)) pts(i + 1).Y = cy + CInt(r2 * Sin((i + 1) * PI / 5 - PI / 2)) Next i Dim texture_brush As New TextureBrush(new Bitmap("yourfile.jpg")) e.Graphics.FillPolygon(texture_brush, pts) e.Graphics.DrawPolygon(Pens.Black, pts) 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</source>
Transform and Rotate the TextureBrush
<source lang="vbnet">Imports System.Drawing Imports System.Drawing.Drawing2D Imports System.Windows.Forms Imports System.Math public class TextureBrushTransformAndRotate
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 cx As Integer = Me.ClientSize.Width \ 2 Dim cy As Integer = Me.ClientSize.Height \ 2 Dim r1 As Integer = Min(cx, cy) - 10 Dim r2 As Integer = Min(cx, cy) \ 2 Dim pts(9) As Point For i As Integer = 0 To 9 Step 2 pts(i).X = cx + CInt(r1 * Cos(i * PI / 5 - PI / 2)) pts(i).Y = cy + CInt(r1 * Sin(i * PI / 5 - PI / 2)) pts(i + 1).X = cx + CInt(r2 * Cos((i + 1) * PI / 5 - PI / 2)) pts(i + 1).Y = cy + CInt(r2 * Sin((i + 1) * PI / 5 - PI / 2)) Next i Dim texture_brush As New TextureBrush(new Bitmap("yourfile.jpg")) texture_brush.ScaleTransform(20, 10, MatrixOrder.Append) texture_brush.RotateTransform(30, MatrixOrder.Append) e.Graphics.FillPolygon(texture_brush, pts) e.Graphics.DrawPolygon(Pens.Black, pts) 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</source>
Transform TextureBrush
<source lang="vbnet">Imports System.Drawing Imports System.Drawing.Drawing2D Imports System.Windows.Forms public class TransformTextureBrush
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 = Me.CreateGraphics() g.Clear(Me.BackColor) " Create a TextureBrush object Dim txtrBrush As New TextureBrush(New Bitmap("yourfile.jpg")) " Create a transformation matrix. Dim M As New Matrix " Rotate the texture image by 90 degrees. txtrBrush.RotateTransform(90, MatrixOrder.Prepend) " Translate M.Translate(50, 0) " Multiply the transformation matrix " of tBrush by translateMatrix. txtrBrush.MultiplyTransform(M) " Scale operation txtrBrush.ScaleTransform(2, 1, MatrixOrder.Prepend) " Fill a rectangle with texture brush g.FillRectangle(txtrBrush, 240, 0, 200, 200) " Reset transformation txtrBrush.ResetTransform() " Fill rectangle after reseting transformation g.FillRectangle(txtrBrush, 0, 0, 200, 200) " Dispose txtrBrush.Dispose() g.Dispose() 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</source>