VB.Net Tutorial/2D Graphics/MetaFile WMF
Содержание
Create a Metafile
<source lang="vbnet">Imports System.Drawing.Imaging Imports System.Drawing Imports System.Drawing.Drawing2D Imports System.Windows.Forms public class MetafileHeaderInfo
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() Dim hdc As IntPtr = g.GetHdc() Dim rect As New Rectangle(20, 20, 200, 100) Dim curMetafile As New Metafile(hdc, EmfType.EmfPlusDual, "yourfile.emf") Dim g1 As Graphics = Graphics.FromImage(curMetafile) " g1.SmoothingMode = SmoothingMode.HighQuality g1.FillRectangle(Brushes.Red, rect) rect.Y += 110 g1.DrawEllipse(New Pen(Brushes.Green, 3), rect) g1.DrawLine(Pens.Blue, New Point(20, 20), New Point(400, 200)) "Release objects g.ReleaseHdc(hdc) g1.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>
Draw a meta wmf file
<source lang="vbnet">Imports System.Drawing Imports System.Drawing.Drawing2D Imports System.Drawing.Imaging Imports System.Windows.Forms public class MetafileDraw
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) Dim curMetafile As New Metafile("yourfile.wmf") g.DrawImage(curMetafile, 0, 0) 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>
Draw on a wmf file
<source lang="vbnet">Imports System.Drawing.Imaging Imports System.Drawing Imports System.Drawing.Drawing2D Imports System.Windows.Forms public class DrawOnWMFFile
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 curMetafile As Metafile = Nothing Dim g As Graphics = Me.CreateGraphics() Dim hdc As IntPtr = g.GetHdc() Dim rect As New Rectangle(0, 0, 200, 200) curMetafile = New Metafile("newFile.wmf", hdc)
Dim g1 As Graphics = Graphics.FromImage(curMetafile) g1.SmoothingMode = SmoothingMode.HighQuality g1.FillRectangle(Brushes.Green, rect) rect.Y += 110 Dim lgBrush As New LinearGradientBrush(rect, Color.Red, Color.Blue, 45.0F) g1.FillEllipse(lgBrush, rect) rect.Y += 110 g1.DrawString("MetaFile Sample", New Font("Verdana", 20), lgBrush, 200, 200, StringFormat.GenericTypographic) g.ReleaseHdc(hdc) g1.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>
Make Metafile (WMF)
<source lang="vbnet">Imports System.Drawing.Imaging Imports System.Drawing Imports System.Drawing.Drawing2D Imports System.Windows.Forms Imports System.Math public class WMFFileCreate
public Shared Sub Main Application.Run(New Form1) End Sub
End class
Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load Const WID As Integer = 200 Dim file_name As String = "test.wmf" Dim me_gr As Graphics = Me.CreateGraphics Dim me_hdc As IntPtr = me_gr.GetHdc Dim bounds As New RectangleF(0, 0, WID, WID) Dim mf As New Metafile(file_name, me_hdc, bounds, MetafileFrameUnit.Pixel) me_gr.ReleaseHdc(me_hdc) Dim gr As Graphics = Graphics.FromImage(mf) gr.PageUnit = GraphicsUnit.Pixel gr.Clear(Color.White) gr.DrawEllipse(Pens.Red, bounds) gr.DrawLine(Pens.Blue, 0, 0, WID, WID) gr.DrawLine(Pens.Blue, WID, 0, 0, WID) gr.Dispose() mf.Dispose() mf = New Metafile(file_name) Dim bm As New Bitmap(WID, WID) gr = Graphics.FromImage(bm) Dim dest_bounds As New RectangleF(0, 0, WID, WID) Dim source_bounds As New RectangleF(0, 0, WID + 1, WID + 1) gr.DrawImage(mf, bounds, source_bounds, GraphicsUnit.Pixel) picOrig.SizeMode = PictureBoxSizeMode.AutoSize picOrig.Image = bm gr.Dispose() mf.Dispose() mf = New Metafile(file_name) picSmall.SetBounds(picOrig.Right + 10, picOrig.Top,picOrig.Width \ 2, picOrig.Height \ 2) bm = New Bitmap(picSmall.ClientSize.Width,picSmall.ClientSize.Height) gr = Graphics.FromImage(bm) gr.ScaleTransform(0.5, 0.5) gr.DrawImage(mf, bounds, source_bounds, GraphicsUnit.Pixel) picSmall.Image = bm gr.Dispose() mf.Dispose() End Sub
End Class <Global.Microsoft.VisualBasic.rupilerServices.DesignerGenerated()> _ Partial Public Class Form1
Inherits System.Windows.Forms.Form "Form overrides dispose to clean up the component list. <System.Diagnostics.DebuggerNonUserCode()> _ Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean) If disposing AndAlso components IsNot Nothing Then components.Dispose() 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.picSmall = New System.Windows.Forms.PictureBox Me.picOrig = New System.Windows.Forms.PictureBox CType(Me.picSmall, System.ruponentModel.ISupportInitialize).BeginInit() CType(Me.picOrig, System.ruponentModel.ISupportInitialize).BeginInit() Me.SuspendLayout() " "picSmall " Me.picSmall.Location = New System.Drawing.Point(64, 8) Me.picSmall.Name = "picSmall" Me.picSmall.Size = New System.Drawing.Size(32, 24) Me.picSmall.TabIndex = 3 Me.picSmall.TabStop = False " "picOrig " Me.picOrig.Location = New System.Drawing.Point(8, 8) Me.picOrig.Name = "picOrig" Me.picOrig.Size = New System.Drawing.Size(48, 56) Me.picOrig.TabIndex = 2 Me.picOrig.TabStop = False " "Form1 " Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!) Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font Me.ClientSize = New System.Drawing.Size(326, 215) Me.Controls.Add(Me.picSmall) Me.Controls.Add(Me.picOrig) Me.Name = "Form1" Me.Text = "MakeMetafile" CType(Me.picSmall, System.ruponentModel.ISupportInitialize).EndInit() CType(Me.picOrig, System.ruponentModel.ISupportInitialize).EndInit() Me.ResumeLayout(False) End Sub Friend WithEvents picSmall As System.Windows.Forms.PictureBox Friend WithEvents picOrig As System.Windows.Forms.PictureBox
End Class</source>
Set EnumerateMetafileProc property
<source lang="vbnet">Imports System.Drawing Imports System.Drawing.Imaging Imports System.Drawing.Drawing2D Imports System.Windows.Forms public class EnumerateMetafileProc
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) Dim curMetafile As New Metafile("mtfile.wmf") Dim enumMetaCB1 As New Graphics.EnumerateMetafileProc(AddressOf EnumMetaCB) g.EnumerateMetafile(curMetafile, New Point(0, 0), EnumMetaCB1) curMetafile.Dispose() g.Dispose() End Sub Private Function EnumMetaCB(ByVal recordType As EmfPlusRecordType, ByVal flags As Integer, ByVal dataSize As Integer, ByVal data As IntPtr, ByVal callbackData As PlayRecordCallback) As Boolean " Dim str As String = "" " Play only EmfPlusRecordType.FillEllipse records. If recordType = EmfPlusRecordType.FillEllipse Or recordType = EmfPlusRecordType.FillRects Or recordType = EmfPlusRecordType.DrawEllipse Or recordType = EmfPlusRecordType.DrawRects Then str = "Record type:" + recordType.ToString() + ", Flags:" + flags.ToString() + ", DataSize:" + dataSize.ToString() + ", Data:" + data.ToString() MessageBox.Show(str) End If Return True End Function "EnumMetaCB 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>