VB.Net Tutorial/GUI/Irregular Window — различия между версиями

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Текущая версия на 15:56, 26 мая 2010

Drag and drop irregular window

<source lang="vbnet">Imports System.Drawing Imports System.Drawing.Drawing2D Imports System.Windows.Forms public class TransparentFormDemo

  public Shared Sub Main
       Application.Run(New TransparentForm)
  End Sub

End class Public Class TransparentForm

   Inherits System.Windows.Forms.Form
  1. 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
       Me.SetStyle(ControlStyles.ResizeRedraw, True)
   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()
       "
       "TransparentForm
       "
       Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
       Me.ClientSize = New System.Drawing.Size(208, 68)
       Me.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None
       Me.Name = "TransparentForm"
       Me.Text = "Transparency Test"
   End Sub
  1. End Region
   Private Sub TransparentForm_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles MyBase.Paint
       Dim g As Graphics = e.Graphics
       Dim pen As Pen = New Pen(Color.Red, 4)
       Dim rect As Rectangle = Me.ClientRectangle
       rect.Inflate(-2, -2)
       g.FillEllipse(Brushes.Yellow, rect)
       g.DrawEllipse(pen, rect)
       pen.Dispose()
   End Sub
   Sub SetEllipseRegion()
       Dim rect As Rectangle = Me.ClientRectangle
       Dim path As GraphicsPath = New GraphicsPath()
       path.AddEllipse(RectangleF.op_Implicit(rect))
       Me.Region = New Region(path)
       path.Dispose()
   End Sub
   Private Sub TransparentForm_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Load
       SetEllipseRegion()
   End Sub
   Private Sub TransparentForm_SizeChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.SizeChanged
       SetEllipseRegion()
   End Sub
   Dim downpoint As Point = Point.Empty
   Private Sub TransparentForm_MouseDown(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles MyBase.MouseDown
       If e.Button <> MouseButtons.Left Then Exit Sub
       downpoint = New Point(e.X, e.Y)
   End Sub
   Private Sub TransparentForm_MouseMove(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles MyBase.MouseMove
       If downpoint = Point.Empty Then Exit Sub
       Dim location As Point = New Point(me.Left + e.X - downpoint.X, me.Top + e.Y - downpoint.Y)
       Me.Location = location
   End Sub
   Private Sub TransparentForm_MouseUp(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles MyBase.MouseUp
       If e.Button <> MouseButtons.Left Then Exit Sub
       downpoint = Point.Empty
   End Sub

End Class</source>

Form Hole

<source lang="vbnet">Imports System.Windows.Forms Imports System.Drawing Imports System.Drawing.Drawing2D public class FormHole

  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
       TransparencyKey = BackColor
       Label1.BackColor = TransparencyKey
   End Sub
   Private Sub Form1_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles Me.Paint
       Dim thick_pen As New Pen(Color.Black, 10)
       Dim rect As New Rectangle( _
           e.ClipRectangle.X + 10, _
           e.ClipRectangle.Y + 10, _
           e.ClipRectangle.Width - 20, _
           e.ClipRectangle.Height - 20)
       e.Graphics.DrawEllipse(thick_pen, rect)
       thick_pen.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 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.Label1 = New System.Windows.Forms.Label
       Me.SuspendLayout()
       "
       "Label1
       "
       Me.Label1.AutoSize = True
       Me.Label1.BackColor = System.Drawing.SystemColors.Control
       Me.Label1.Font = New System.Drawing.Font("Forte", 48.0!, System.Drawing.FontStyle.Italic, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
       Me.Label1.Location = New System.Drawing.Point(48, 56)
       Me.Label1.Name = "Label1"
       Me.Label1.Size = New System.Drawing.Size(169, 70)
       Me.Label1.TabIndex = 0
       Me.Label1.Text = "Hole"
       Me.Label1.TextAlign = System.Drawing.ContentAlignment.MiddleCenter
       "
       "Form1
       "
       Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
       Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
       Me.BackColor = System.Drawing.Color.Red
       Me.ClientSize = New System.Drawing.Size(274, 187)
       Me.Controls.Add(Me.Label1)
       Me.Name = "Form1"
       Me.Text = "Form1"
       Me.ResumeLayout(False)
       Me.PerformLayout()
   End Sub
   Friend WithEvents Label1 As System.Windows.Forms.Label

End Class</source>

Resize irregular window

<source lang="vbnet">" Quote from "Windows Forms Programming in VB "by Chris Sells (Author), Justin Gehtland (Author) "Publisher: Addison-Wesley Professional; 1st edition (October 24, 2003) "Language: English "ISBN-10: 0321125193 "ISBN-13: 978-0321125194 Imports System.Drawing Imports System.Drawing.Drawing2D Imports System.Windows.Forms public class TransparentFormDemo

  public Shared Sub Main
       Application.Run(New TransparentForm)
  End Sub

End class Public Class TransparentForm

   Inherits System.Windows.Forms.Form
  1. 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
       Me.SetStyle(ControlStyles.ResizeRedraw, True)
   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()
       "
       "TransparentForm
       "
       Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
       Me.ClientSize = New System.Drawing.Size(208, 68)
       Me.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None
       Me.Name = "TransparentForm"
       Me.Text = "Transparency Test"
   End Sub
  1. End Region
   Protected Overrides Sub WndProc(ByRef m As System.Windows.Forms.Message)
       MyBase.WndProc(m)
       Dim WM_NCHITTEST As Integer = &H84
       If m.Msg <> WM_NCHITTEST Then Exit Sub
       Dim HTCLIENT As Integer = 1
       Dim HTCAPTION As Integer = 2
       If m.Result.ToInt32() = HTCLIENT Then m.Result = New IntPtr(HTCAPTION)
       Dim HTLEFT As Integer = 10
       Dim HTRIGHT As Integer = 11
       Dim HTTOP As Integer = 12
       Dim HTTOPLEFT As Integer = 13
       Dim HTTOPRIGHT As Integer = 14
       Dim HTBOTTOM As Integer = 15
       Dim HTBOTTOMLEFT As Integer = 16
       Dim HTBOTTOMRIGHT As Integer = 17
       Dim clientLocation As Point = Me.PointToClient(New Point(m.LParam.ToInt32))
       Dim x As Integer = clientLocation.X 
       Dim y As Integer = clientLocation.Y 
       If x = 0 And y = 0 Then
           m.Result = New IntPtr(HTCAPTION)
           Exit Sub
       ElseIf x = 0 And y >= 0 Then
           m.Result = New IntPtr(HTRIGHT)
           Exit Sub
       ElseIf x = 0 Then
           m.Result = New IntPtr(HTLEFT)
           Exit Sub
       ElseIf y = 0 And x >= 0 Then
           m.Result = New IntPtr(HTTOP)
           Exit Sub
       ElseIf y = 0 Then
           m.Result = New IntPtr(HTBOTTOM)
           Exit Sub
       End If
       Dim slopeAbs As Double = Math.Abs(CDbl(y) / CDbl(x))
       If x > 0 And y > 0 Then
           " Q1
           If slopeAbs > 2 Then
               m.Result = New IntPtr(HTTOP)
           ElseIf slopeAbs < 0.5 Then
               m.Result = New IntPtr(HTRIGHT)
           Else
               m.Result = New IntPtr(HTTOPRIGHT)
           End If
       ElseIf x > 0 And y < 0 Then
           " Q2
           If slopeAbs > 2 Then
               m.Result = New IntPtr(HTBOTTOM)
           ElseIf slopeAbs < 0.5 Then
               m.Result = New IntPtr(HTRIGHT)
           Else
               m.Result = New IntPtr(HTBOTTOMRIGHT)
           End If
       ElseIf x < 0 And y < 0 Then
           " Q3
           If slopeAbs > 2 Then
               m.Result = New IntPtr(HTBOTTOM)
           ElseIf slopeAbs < 0.5 Then
               m.Result = New IntPtr(HTLEFT)
           Else
               m.Result = New IntPtr(HTBOTTOMLEFT)
           End If
       Else
           " Q4
           If slopeAbs > 2 Then
               m.Result = New IntPtr(HTTOP)
           ElseIf slopeAbs < 0.5 Then
               m.Result = New IntPtr(HTLEFT)
           Else
               m.Result = New IntPtr(HTTOPLEFT)
           End If
       End If
   End Sub

End Class</source>