VB.Net Tutorial/2D Graphics/Pen Alignment — различия между версиями
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Текущая версия на 15:54, 26 мая 2010
List all Pen Alignment
<source lang="vbnet">Imports System.Drawing Imports System.Drawing.Drawing2D Imports System.Windows.Forms public class AlignmentsDemo
public Shared Sub Main Application.Run(New AlignmentsForm) End Sub
End class Public Class AlignmentsForm
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() components = New System.ruponentModel.Container() Me.Text = "AlignmentsForm" End Sub
- End Region
Private Sub AlignmentsForm_Paint(ByVal sender As Object, ByVal e As PaintEventArgs) Handles MyBase.Paint Dim g As Graphics = e.Graphics Dim alignNames As String() = System.Enum.GetNames(GetType(PenAlignment)) Array.Sort(alignNames) Dim x As Integer = 0 Dim y As Integer = 0 Dim width As Integer = Me.ClientRectangle.Width Dim height As Integer = Me.ClientRectangle.Height Dim blackBrush As Brush = Brushes.Black Dim redPen As Pen = Pens.Red Dim alignName As String For Each alignName In alignNames Dim pen As Pen = New Pen(Color.White, 13) g.DrawEllipse(pen, x + 10, y + 10, width - 20, height - 20) g.DrawEllipse(redPen, x + 10, y + 10, width - 20, height - 20) Dim format As StringFormat = New StringFormat() format.Alignment = StringAlignment.Center format.LineAlignment = StringAlignment.Center g.DrawString(alignName, Me.Font, blackBrush, New RectangleF(x, y, width, height), format) y = y + 15 Next End Sub
End Class</source>
PenAlignment Illustration
<source lang="vbnet">Imports System Imports System.Drawing Imports System.Collections Imports System.ruponentModel Imports System.Windows.Forms Imports System.Data Imports System.Drawing.Drawing2D public class PenAlignmentComboBox
public Shared Sub Main Application.Run(New Form1) End Sub
End class Public Class Form1
Inherits System.Windows.Forms.Form Private penColor As Color = Color.Red Dim penWidth As Integer = 5
- 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. Friend WithEvents Label1 As System.Windows.Forms.Label Friend WithEvents Label2 As System.Windows.Forms.Label Friend WithEvents ComboBox1 As System.Windows.Forms.ruboBox Friend WithEvents numericUpDown1 As System.Windows.Forms.NumericUpDown Friend WithEvents Label3 As System.Windows.Forms.Label Friend WithEvents ColorBtn As System.Windows.Forms.Button Friend WithEvents Draw As System.Windows.Forms.Button <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent() Me.Label1 = New System.Windows.Forms.Label Me.Label2 = New System.Windows.Forms.Label Me.ruboBox1 = New System.Windows.Forms.ruboBox Me.numericUpDown1 = New System.Windows.Forms.NumericUpDown Me.Label3 = New System.Windows.Forms.Label Me.ColorBtn = New System.Windows.Forms.Button Me.Draw = New System.Windows.Forms.Button CType(Me.numericUpDown1, System.ruponentModel.ISupportInitialize).BeginInit() Me.SuspendLayout() " "Label1 " Me.Label1.Location = New System.Drawing.Point(8, 16) Me.Label1.Name = "Label1" Me.Label1.Size = New System.Drawing.Size(80, 23) Me.Label1.TabIndex = 0 Me.Label1.Text = "Pen Alignment" " "Label2 " Me.Label2.Location = New System.Drawing.Point(8, 56) Me.Label2.Name = "Label2" Me.Label2.Size = New System.Drawing.Size(72, 23) Me.Label2.TabIndex = 1 Me.Label2.Text = "Pen Width" " "ComboBox1 " Me.ruboBox1.Location = New System.Drawing.Point(96, 16) Me.ruboBox1.Name = "ComboBox1" Me.ruboBox1.Size = New System.Drawing.Size(121, 21) Me.ruboBox1.TabIndex = 2 Me.ruboBox1.Text = "ComboBox1" " "numericUpDown1 " Me.numericUpDown1.Location = New System.Drawing.Point(96, 56) Me.numericUpDown1.Name = "numericUpDown1" Me.numericUpDown1.Size = New System.Drawing.Size(32, 20) Me.numericUpDown1.TabIndex = 7 " "Label3 " Me.Label3.Location = New System.Drawing.Point(136, 56) Me.Label3.Name = "Label3" Me.Label3.Size = New System.Drawing.Size(56, 23) Me.Label3.TabIndex = 8 Me.Label3.Text = "Pen Color" " "ColorBtn " Me.ColorBtn.BackColor = System.Drawing.Color.FromArgb(CType(192, Byte), CType(0, Byte), CType(0, Byte)) Me.ColorBtn.FlatStyle = System.Windows.Forms.FlatStyle.Flat Me.ColorBtn.Location = New System.Drawing.Point(192, 56) Me.ColorBtn.Name = "ColorBtn" Me.ColorBtn.Size = New System.Drawing.Size(24, 16) Me.ColorBtn.TabIndex = 9 " "Draw " Me.Draw.Location = New System.Drawing.Point(56, 104) Me.Draw.Name = "Draw" Me.Draw.Size = New System.Drawing.Size(120, 40) Me.Draw.TabIndex = 10 Me.Draw.Text = "DrawGraphics" " "Form1 " Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13) Me.ClientSize = New System.Drawing.Size(360, 349) Me.Controls.Add(Me.Draw) Me.Controls.Add(Me.ColorBtn) Me.Controls.Add(Me.Label3) Me.Controls.Add(Me.numericUpDown1) Me.Controls.Add(Me.ruboBox1) Me.Controls.Add(Me.Label2) Me.Controls.Add(Me.Label1) Me.Name = "Form1" Me.Text = "Pen Alignment and Pen Types Sample" CType(Me.numericUpDown1, System.ruponentModel.ISupportInitialize).EndInit() Me.ResumeLayout(False) End Sub
- End Region
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load AddPenAlignments() End Sub Private Sub AddPenAlignments() comboBox1.Items.Add(PenAlignment.Center) comboBox1.Text = PenAlignment.Center.ToString() comboBox1.Items.Add(PenAlignment.Inset) comboBox1.Items.Add(PenAlignment.Left) comboBox1.Items.Add(PenAlignment.Outset) comboBox1.Items.Add(PenAlignment.Right) End Sub "AddPenAlignments Private Sub Draw_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Draw.Click Dim g As Graphics = Me.CreateGraphics() g.Clear(Me.BackColor) Dim pn1 As New Pen(Color.Blue, 3) pn1.Width = CSng(numericUpDown1.Value) pn1.Color = ColorBtn.BackColor Dim str As String = ComboBox1.Text Select Case str Case "Center" pn1.Alignment = PenAlignment.Center Case "Inset" pn1.Alignment = PenAlignment.Inset Case "Left" pn1.Alignment = PenAlignment.Left Case "Outset" pn1.Alignment = PenAlignment.Outset Case "Right" pn1.Alignment = PenAlignment.Right Case Else End Select g.DrawRectangle(pn1, 80, 150, 150, 150) Dim brush As New LinearGradientBrush(New Rectangle(10, 10, 20, 20), Color.Blue, Color.Green, 45.0F) g.FillRectangle(brush, 90, 160, 130, 130) pn1.Dispose() g.Dispose() End Sub
End Class</source>