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LEDClock - Windows Forms Composite Control

, 4 Jun 2002
This article explains how to build Popup editor and link it to an appropriate property in Properties Window
ledclock_demo.zip
bin
LEDClock.dll
TestLEDClock.exe
TestLEDClock.suo
TestLEDClock.vbproj.user
ledclock_src.zip
LEDClock.vbproj.user
LEDClock.suo
Imports System.Drawing.Design
Imports System.Windows.Forms.Design

Public Class LEDEditor
    Inherits System.Windows.Forms.Form

#Region " Windows Form Designer generated code "

    Public Sub New(ByVal current As String)
        MyBase.New()

        'This call is required by the Windows Form Designer.
        InitializeComponent()

        Me.Value = current
        '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.ComponentModel.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 txtH1 As System.Windows.Forms.TextBox
    Friend WithEvents txtH2 As System.Windows.Forms.TextBox
    Friend WithEvents txtM1 As System.Windows.Forms.TextBox
    Friend WithEvents txtM2 As System.Windows.Forms.TextBox
    Friend WithEvents txtS1 As System.Windows.Forms.TextBox
    Friend WithEvents txtS2 As System.Windows.Forms.TextBox
    Friend WithEvents btnOK As System.Windows.Forms.Button
    Friend WithEvents btnCancel As System.Windows.Forms.Button
    Friend WithEvents LedClock1 As WinControls.LEDClock
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.txtH1 = New System.Windows.Forms.TextBox()
        Me.txtH2 = New System.Windows.Forms.TextBox()
        Me.txtM1 = New System.Windows.Forms.TextBox()
        Me.txtM2 = New System.Windows.Forms.TextBox()
        Me.txtS1 = New System.Windows.Forms.TextBox()
        Me.txtS2 = New System.Windows.Forms.TextBox()
        Me.btnOK = New System.Windows.Forms.Button()
        Me.btnCancel = New System.Windows.Forms.Button()
        Me.LedClock1 = New WinControls.LEDClock()
        Me.SuspendLayout()
        '
        'txtH1
        '
        Me.txtH1.Location = New System.Drawing.Point(16, 40)
        Me.txtH1.MaxLength = 1
        Me.txtH1.Name = "txtH1"
        Me.txtH1.Size = New System.Drawing.Size(32, 20)
        Me.txtH1.TabIndex = 1
        Me.txtH1.Text = ""
        Me.txtH1.TextAlign = System.Windows.Forms.HorizontalAlignment.Center
        '
        'txtH2
        '
        Me.txtH2.Location = New System.Drawing.Point(48, 40)
        Me.txtH2.MaxLength = 1
        Me.txtH2.Name = "txtH2"
        Me.txtH2.Size = New System.Drawing.Size(32, 20)
        Me.txtH2.TabIndex = 1
        Me.txtH2.Text = ""
        Me.txtH2.TextAlign = System.Windows.Forms.HorizontalAlignment.Center
        '
        'txtM1
        '
        Me.txtM1.Location = New System.Drawing.Point(112, 40)
        Me.txtM1.MaxLength = 1
        Me.txtM1.Name = "txtM1"
        Me.txtM1.Size = New System.Drawing.Size(32, 20)
        Me.txtM1.TabIndex = 1
        Me.txtM1.Text = ""
        Me.txtM1.TextAlign = System.Windows.Forms.HorizontalAlignment.Center
        '
        'txtM2
        '
        Me.txtM2.Location = New System.Drawing.Point(144, 40)
        Me.txtM2.MaxLength = 1
        Me.txtM2.Name = "txtM2"
        Me.txtM2.Size = New System.Drawing.Size(32, 20)
        Me.txtM2.TabIndex = 1
        Me.txtM2.Text = ""
        Me.txtM2.TextAlign = System.Windows.Forms.HorizontalAlignment.Center
        '
        'txtS1
        '
        Me.txtS1.Location = New System.Drawing.Point(208, 40)
        Me.txtS1.MaxLength = 1
        Me.txtS1.Name = "txtS1"
        Me.txtS1.Size = New System.Drawing.Size(32, 20)
        Me.txtS1.TabIndex = 1
        Me.txtS1.Text = ""
        Me.txtS1.TextAlign = System.Windows.Forms.HorizontalAlignment.Center
        '
        'txtS2
        '
        Me.txtS2.Location = New System.Drawing.Point(240, 40)
        Me.txtS2.MaxLength = 1
        Me.txtS2.Name = "txtS2"
        Me.txtS2.Size = New System.Drawing.Size(32, 20)
        Me.txtS2.TabIndex = 1
        Me.txtS2.Text = ""
        Me.txtS2.TextAlign = System.Windows.Forms.HorizontalAlignment.Center
        '
        'btnOK
        '
        Me.btnOK.Location = New System.Drawing.Point(56, 72)
        Me.btnOK.Name = "btnOK"
        Me.btnOK.TabIndex = 2
        Me.btnOK.Text = "OK"
        '
        'btnCancel
        '
        Me.btnCancel.DialogResult = System.Windows.Forms.DialogResult.Cancel
        Me.btnCancel.Location = New System.Drawing.Point(160, 72)
        Me.btnCancel.Name = "btnCancel"
        Me.btnCancel.TabIndex = 2
        Me.btnCancel.Text = "Cancel"
        '
        'LedClock1
        '
        Me.LedClock1.Location = New System.Drawing.Point(16, 0)
        Me.LedClock1.Name = "LedClock1"
        Me.LedClock1.Size = New System.Drawing.Size(256, 32)
        Me.LedClock1.TabIndex = 3
        Me.LedClock1.Time = "00:00:00"
        '
        'LEDEditor
        '
        Me.AcceptButton = Me.btnOK
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
        Me.CancelButton = Me.btnCancel
        Me.ClientSize = New System.Drawing.Size(290, 103)
        Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.LedClock1, Me.btnOK, Me.txtH1, Me.txtH2, Me.txtM1, Me.txtM2, Me.txtS1, Me.txtS2, Me.btnCancel})
        Me.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedDialog
        Me.MaximizeBox = False
        Me.MinimizeBox = False
        Me.Name = "LEDEditor"
        Me.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen
        Me.Text = "LEDEditor"
        Me.ResumeLayout(False)

    End Sub

#End Region

    Private mValue As String

    Public Property Value() As String
        Get
            Return mValue
        End Get
        Set(ByVal Value As String)
            mValue = Value
        End Set
    End Property

    Private Sub btnOK_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnOK.Click
        mValue = Me.txtH1.Text & Me.txtH2.Text & ":" & Me.txtM1.Text & Me.txtM2.Text & ":" & Me.txtS1.Text & Me.txtS2.Text
        Me.Close()
    End Sub

    Protected Overrides Sub OnLoad(ByVal e As System.EventArgs)
        Me.LedClock1.Time = mValue
        Me.txtH1.Text = mValue.Substring(0, 1)
        Me.txtH2.Text = mValue.Substring(1, 1)
        Me.txtM1.Text = mValue.Substring(3, 1)
        Me.txtM2.Text = mValue.Substring(4, 1)
        Me.txtS1.Text = mValue.Substring(6, 1)
        Me.txtS2.Text = mValue.Substring(7, 1)
        Me.LedClock1.Stop()
    End Sub

    Private Sub txt_Validating(ByVal sender As Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles txtH1.Validating, txtH2.Validating, txtM1.Validating, txtM2.Validating, txtS1.Validating, txtS2.Validating
        If IsNumeric(Me.txtH1.Text) = False Or IsNumeric(Me.txtH2.Text) = False Or _
        IsNumeric(Me.txtM1.Text) = False Or IsNumeric(Me.txtM2.Text) = False Or _
        IsNumeric(Me.txtS1.Text) = False Or IsNumeric(Me.txtS2.Text) = False Then
            MsgBox("Value must be numeric.", MsgBoxStyle.Exclamation)
            e.Cancel = True
            Exit Sub
        End If
        If CInt(Me.txtH1.Text & Me.txtH2.Text) > 23 Then
            MsgBox("HOURS: Value must be less then 24.", MsgBoxStyle.Exclamation)
            e.Cancel = True
        End If
        If CInt(Me.txtM1.Text & Me.txtM2.Text) > 59 Then
            MsgBox("MINUTES: Value must be less then 59.", MsgBoxStyle.Exclamation)
            e.Cancel = True
        End If
        If CInt(Me.txtS1.Text & Me.txtS2.Text) > 59 Then
            MsgBox("SECONDS: Value must be less then 59.", MsgBoxStyle.Exclamation)
            e.Cancel = True
        End If
    End Sub

End Class

Public Class LEDTypeEditor
    Inherits UITypeEditor

    Public Overloads Overrides Function EditValue(ByVal context As System.ComponentModel.ITypeDescriptorContext, ByVal provider As System.IServiceProvider, ByVal value As Object) As Object
        Dim edSvc As IWindowsFormsEditorService
        Try
            edSvc = CType(provider.GetService(GetType(IWindowsFormsEditorService)), IWindowsFormsEditorService)
            Dim edForm As LEDEditor
            edForm = New LEDEditor(CStr(value))
            edSvc.ShowDialog(edForm)
            If edForm.DialogResult = DialogResult.OK Then
                edForm.Value = edForm.txtH1.Text & edForm.txtH2.Text & ":" & edForm.txtM1.Text & edForm.txtM2.Text & ":" & edForm.txtS1.Text & edForm.txtS2.Text
            End If
            Return edForm.Value
        Catch e As Exception
            MsgBox(e.ToString)
        End Try
    End Function

    Public Overloads Overrides Function GetEditStyle(ByVal context As System.ComponentModel.ITypeDescriptorContext) As System.Drawing.Design.UITypeEditorEditStyle
        Return UITypeEditorEditStyle.Modal
    End Function

End Class

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About the Author

Andelko Pavelic

Australia Australia
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Web04 | 2.8.141223.1 | Last Updated 5 Jun 2002
Article Copyright 2002 by Andelko Pavelic
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