VB.Net/GUI/ScrollBar

Материал из VB Эксперт
Версия от 15:43, 26 мая 2010; Admin (обсуждение | вклад) (1 версия)
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Get HScrollBar Value

<source lang="vbnet"> Imports System Imports System.Windows.Forms Imports System.Drawing Imports System.Drawing.Drawing2D Imports System.Drawing.Text Imports System.Drawing.Imaging 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
  1. Region " Windows Form Designer generated code "
 Public Sub New()
   MyBase.New()
   "This call is required by the Windows Form Designer.
   InitializeComponent()
   AlphaScroll.Minimum = 20
   AlphaScroll.Maximum = 245
   AlphaScroll.SmallChange = 5
   AlphaScroll.LargeChange = 5
   GammaScroll.Minimum = 1
   GammaScroll.Maximum = 50
   GammaScroll.SmallChange = 1
   GammaScroll.LargeChange = 5
 End Sub
 Friend WithEvents GammaScroll As System.Windows.Forms.HScrollBar
 Friend WithEvents AlphaScroll As System.Windows.Forms.HScrollBar
 "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.GammaScroll = New System.Windows.Forms.HScrollBar()
   Me.AlphaScroll = New System.Windows.Forms.HScrollBar()
   Me.SuspendLayout()
   "
   "GammaScroll
   "
   Me.GammaScroll.Location = New System.Drawing.Point(32, 24)
   Me.GammaScroll.Name = "GammaScroll"
   Me.GammaScroll.Size = New System.Drawing.Size(96, 16)
   Me.GammaScroll.TabIndex = 0
   "
   "AlphaScroll
   "
   Me.AlphaScroll.Location = New System.Drawing.Point(32, 136)
   Me.AlphaScroll.Name = "AlphaScroll"
   Me.AlphaScroll.Size = New System.Drawing.Size(96, 16)
   Me.AlphaScroll.TabIndex = 1
   "
   "Form1
   "
   Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
   Me.ClientSize = New System.Drawing.Size(292, 273)
   Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.AlphaScroll, Me.GammaScroll})
   Me.Name = "Form1"
   Me.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen
   Me.Text = "Form1"
   Me.ResumeLayout(False)
 End Sub
  1. End Region
 Private Sub Form1_Load(ByVal sender As System.Object, _
                        ByVal e As System.EventArgs) _
                        Handles MyBase.Load
 End Sub
 Private Sub GammaScroll_Scroll(ByVal sender As System.Object, _
                         ByVal e As System.Windows.Forms.ScrollEventArgs) _
                         Handles GammaScroll.Scroll
   
   Console.WriteLine( CType(GammaScroll.Value / 10, Single) )
 End Sub
 Private Sub AlphaScroll_Scroll(ByVal sender As System.Object, _
                         ByVal e As System.Windows.Forms.ScrollEventArgs) _
                         Handles AlphaScroll.Scroll
   Console.WriteLine( AlphaScroll.Value )
 End Sub

End Class

      </source>


Get Value from Vertical Scroll Bar

<source lang="vbnet"> Imports System Imports System.Data Imports System.Windows.Forms Imports System.Drawing Public Class MainClass

   Shared Sub Main()
       Dim form1 As Form = New Form1
       Application.Run(form1)
   End Sub

End Class

Public Class Form1

   Private Sub hbarDays_ValueChanged(ByVal sender As Object, _
    ByVal e As System.EventArgs) Handles hbarDays.ValueChanged
       lblDays.Text = hbarDays.Value.ToString
   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.hbarDays = New System.Windows.Forms.HScrollBar
       Me.Label1 = New System.Windows.Forms.Label
       Me.lblDays = New System.Windows.Forms.Label
       Me.SuspendLayout()
       "
       "hbarDays
       "
       Me.hbarDays.Location = New System.Drawing.Point(8, 32)
       Me.hbarDays.Maximum = 109
       Me.hbarDays.Name = "hbarDays"
       Me.hbarDays.Size = New System.Drawing.Size(280, 16)
       Me.hbarDays.TabIndex = 0
       "
       "Label1
       "
       Me.Label1.AutoSize = True
       Me.Label1.Location = New System.Drawing.Point(8, 8)
       Me.Label1.Name = "Label1"
       Me.Label1.Size = New System.Drawing.Size(27, 13)
       Me.Label1.TabIndex = 1
       Me.Label1.Text = "Days"
       "
       "lblDays
       "
       Me.lblDays.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D
       Me.lblDays.Location = New System.Drawing.Point(48, 8)
       Me.lblDays.Name = "lblDays"
       Me.lblDays.Size = New System.Drawing.Size(40, 16)
       Me.lblDays.TabIndex = 2
       Me.lblDays.Text = "0"
       "
       "Form1
       "
       Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
       Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
       Me.ClientSize = New System.Drawing.Size(292, 84)
       Me.Controls.Add(Me.lblDays)
       Me.Controls.Add(Me.Label1)
       Me.Controls.Add(Me.hbarDays)
       Me.Name = "Form1"
       Me.Text = "UseHScrollBar"
       Me.ResumeLayout(False)
       Me.PerformLayout()
   End Sub
   Friend WithEvents hbarDays As System.Windows.Forms.HScrollBar
   Friend WithEvents Label1 As System.Windows.Forms.Label
   Friend WithEvents lblDays As System.Windows.Forms.Label

End Class

      </source>


ScrollBar Demo: get value

<source lang="vbnet"> Imports System.Windows.Forms Module Module1

   Sub Main()
       Application.Run(New Form1)
   End Sub

End Module Public Class Form1

   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
   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 HScrollBar1 As System.Windows.Forms.HScrollBar
   Friend WithEvents VScrollBar1 As System.Windows.Forms.VScrollBar
   Friend WithEvents TextBox1 As System.Windows.Forms.TextBox
   Friend WithEvents TextBox2 As System.Windows.Forms.TextBox
   <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
       Me.HScrollBar1 = New System.Windows.Forms.HScrollBar()
       Me.VScrollBar1 = New System.Windows.Forms.VScrollBar()
       Me.TextBox1 = New System.Windows.Forms.TextBox()
       Me.TextBox2 = New System.Windows.Forms.TextBox()
       Me.SuspendLayout()
       "
       "HScrollBar1
       "
       Me.HScrollBar1.Location = New System.Drawing.Point(32, 112)
       Me.HScrollBar1.Maximum = 1000
       Me.HScrollBar1.Minimum = 1
       Me.HScrollBar1.Name = "HScrollBar1"
       Me.HScrollBar1.Size = New System.Drawing.Size(200, 13)
       Me.HScrollBar1.TabIndex = 0
       Me.HScrollBar1.Value = 1
       "
       "VScrollBar1
       "
       Me.VScrollBar1.LargeChange = 1
       Me.VScrollBar1.Location = New System.Drawing.Point(32, 16)
       Me.VScrollBar1.Minimum = 1
       Me.VScrollBar1.Name = "VScrollBar1"
       Me.VScrollBar1.TabIndex = 1
       Me.VScrollBar1.Value = 1
       "
       "TextBox1
       "
       Me.TextBox1.Location = New System.Drawing.Point(64, 24)
       Me.TextBox1.Name = "TextBox1"
       Me.TextBox1.TabIndex = 2
       Me.TextBox1.Text = ""
       "
       "TextBox2
       "
       Me.TextBox2.Location = New System.Drawing.Point(248, 112)
       Me.TextBox2.Name = "TextBox2"
       Me.TextBox2.TabIndex = 3
       Me.TextBox2.Text = ""
       "
       "Form1
       "
       Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
       Me.ClientSize = New System.Drawing.Size(368, 165)
       Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.TextBox2, Me.TextBox1, Me.VScrollBar1, Me.HScrollBar1})
       Me.Name = "Form1"
       Me.Text = "ScrollBarDemo"
       Me.ResumeLayout(False)
   End Sub
  1. End Region
   Private Sub VScrollBar1_ValueChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles VScrollBar1.ValueChanged
       TextBox1.Text = VScrollBar1.Value
   End Sub
   Private Sub HScrollBar1_Scroll(ByVal sender As Object, ByVal e As System.Windows.Forms.ScrollEventArgs) Handles HScrollBar1.Scroll
       TextBox2.Text = HScrollBar1.Value
   End Sub

End Class

      </source>


Use Scroll Bar to set rotate, X position and repaint

<source lang="vbnet"> Imports System Imports System.Windows.Forms Imports System.Drawing Imports System.Drawing.Drawing2D Imports System.Drawing.Text Imports System.Drawing.Imaging 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
 Dim XlateY As Int32
 Dim Angle As Single
 Dim DrawingRect As Rectangle = New Rectangle(25, 25, 225, 225)
  1. Region " Windows Form Designer generated code "
 Public Sub New()
   MyBase.New()
   "This call is required by the Windows Form Designer.
   InitializeComponent()
   Angle = 0
   Xlatey = 0
   xlate.Minimum = -50
   xlate.Maximum = 50
   xlate.SmallChange = 1
   xlate.LargeChange = 5
   xlate.Value = 0
   rotate.Minimum = -180
   rotate.Maximum = 180
   rotate.SmallChange = 1
   rotate.LargeChange = 10
   rotate.Value = 0
   Me.SetStyle(ControlStyles.AllPaintingInWmPaint, True)
   Me.SetStyle(ControlStyles.DoubleBuffer, True)
   Me.SetStyle(ControlStyles.UserPaint, 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.
 Friend WithEvents xlate As System.Windows.Forms.VScrollBar
 Friend WithEvents rotate As System.Windows.Forms.HScrollBar
 <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
   Me.xlate = New System.Windows.Forms.VScrollBar()
   Me.rotate = New System.Windows.Forms.HScrollBar()
   Me.SuspendLayout()
   "
   "xlate
   "
   Me.xlate.Location = New System.Drawing.Point(264, 32)
   Me.xlate.Name = "xlate"
   Me.xlate.Size = New System.Drawing.Size(16, 200)
   Me.xlate.TabIndex = 0
   "
   "rotate
   "
   Me.rotate.Location = New System.Drawing.Point(8, 240)
   Me.rotate.Name = "rotate"
   Me.rotate.Size = New System.Drawing.Size(240, 16)
   Me.rotate.TabIndex = 1
   "
   "Form1
   "
   Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
   Me.ClientSize = New System.Drawing.Size(292, 273)
   Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.rotate, Me.xlate})
   Me.MaximizeBox = False
   Me.MinimizeBox = False
   Me.Name = "Form1"
   Me.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen
   Me.Text = "Form1"
   Me.ResumeLayout(False)
 End Sub
  1. 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
   G.SmoothingMode = SmoothingMode.AntiAlias
   " Create a graphics path, add a rectangle, set colors
   Dim Path As New GraphicsPath()
   Path.AddRectangle(New Rectangle(75, 100, 100, 75))
   Dim Pts As PointF() = Path.PathPoints
   Dim B As New PathGradientBrush(Pts)
   "translate the brush
   Dim m As New Matrix()
   m.Translate(0, Xlatey, MatrixOrder.Append)
   m.RotateAt(Angle, B.CenterPoint, MatrixOrder.Append)
   B.MultiplyTransform(m, MatrixOrder.Append)
   G.FillRectangle(B, DrawingRect)
 End Sub
 Private Sub xlate_Scroll(ByVal sender As System.Object, _
                          ByVal e As System.Windows.Forms.ScrollEventArgs) _
                          Handles xlate.Scroll
   Xlatey = xlate.Value
   Me.Invalidate(DrawingRect)
 End Sub
 Private Sub rotate_Scroll(ByVal sender As System.Object, _
                           ByVal e As System.Windows.Forms.ScrollEventArgs) _
                           Handles rotate.Scroll
   Angle = rotate.Value
   Me.Invalidate(DrawingRect)
 End Sub

End Class

      </source>