How to make a valve in control editor?

I want to make a control function in Labview5.0,but I don't know how to make it,for example I will make a valve that is a control funtion,how to make it properly

If you were to go to Search Examples>Demonstrations>Process Control>Control Mixer Process, you'll find a VI with several custom controls including a valve. All it is is a boolean with custom images. To make your own, use a drawing program like Paint and make images of your valve in the open and closed state. Place a boolean control on a VI's front panel and choose Edit Control from the Edit menu. Once in the control editor go to customize mode. Choose Import Picture From File from the Edit menu. Right click the boolean control and choose Picture Item to Replace to determine which picture to replace with the one from file (a boolean actually uses 4 pictures but you only need to replace the first two which are the true and false states). Right click again and
choose either Import Picture or Import at Same Size. Repeat for the other boolean state with a different picture. You should save your changes as a .ctl so that you can easily use it again.

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Okie. In "How to use JTables" page found in the JAVA website (there is a link from the JTable section of the JAVA API documentation), there is a sample code for a sample color chooser. What this does is, adds a button with its action listener set to pop up a color chooser window. In this, rendering is still through a JLabel.
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Go to Solution.

This is documented in the LabVIEW Help.
Displaying Hidden Front Panel Objects
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Hi all, i m a begineer of Labview and have some question to ask.
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Go to Solution.
Attachments:
Project 1.png ‏12 KB
Project 2.png ‏18 KB

Well, my suggestion then is to do the following: change final time from Inf back to 10 s (or whatever number that capture the whole simulation) and do a while loop around the Control and Simulation Loop with a "wait until next ms" function to give you time to react and change parameters, like this below. This would make LabVIEW to do the whole simulation, wait for 1000 ms and then, run the simulation again with new parameters. If you need more time, just need to change the constant wired to the "wait until next milisecond".
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Hi,
Whoever made it did not have Option Strict turned on and there was also a namespace that was not imported. I just went through the code and fixed all the errors and added the namespace. It seems to be working after that.
Open your project or even a new form project just to test it on. When the project is opened go to the VB Menu and click (Project) and then select (Add Class). You can leave it named as the default name "Class1.vb" if you want. When
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Imports System.ComponentModel
Public Class DoubleTrackBar
Inherits Control
Public Sub New()
Me.DoubleBuffered = True
Me.SetDefaults()
End Sub
Private Sub SetDefaults()
'Added these to set to a decent size when a new one is added to the form
Me.Width = 200
Me.Height = 50
Me.Orientation = Orientation.Horizontal
Me.SmallChange = 1
Me.Maximum = 400
Me.Minimum = 0
Me.ValueLeft = 0
Me.ValueRight = 300
End Sub
#Region " Private Fields "
Private leftThumbState As VisualStyles.TrackBarThumbState
Private rightThumbState As VisualStyles.TrackBarThumbState
Private draggingLeft, draggingRight As Boolean
#End Region
#Region " Enums "
Public Enum Thumbs
None = 0
Left = 1
Right = 2
End Enum
#End Region
#Region " Properties "
Private _SelectedThumb As Thumbs
''' <summary>
''' Gets the thumb that had focus last.
''' </summary>
''' <returns>The thumb that had focus last.</returns>
<Description("The thumb that had focus last.")> _
Public Property SelectedThumb() As Thumbs
Get
Return _SelectedThumb
End Get
Private Set(ByVal value As Thumbs)
_SelectedThumb = value
End Set
End Property
Private _ValueLeft As Integer
''' <summary>
''' Gets or sets the position of the left slider.
''' </summary>
''' <returns>The position of the left slider.</returns>
<Description("The position of the left slider.")> _
Public Property ValueLeft() As Integer
Get
Return _ValueLeft
End Get
Set(ByVal value As Integer)
If value < Me.Minimum OrElse value > Me.Maximum Then
Throw New ArgumentException(String.Format("Value of '{0}' is not valid for 'ValueLeft'. 'ValueLeft' should be between 'Minimum' and 'Maximum'.", value.ToString()), "ValueLeft")
End If
If value > Me.ValueRight Then
Throw New ArgumentException(String.Format("Value of '{0}' is not valid for 'ValueLeft'. 'ValueLeft' should be less than or equal to 'ValueRight'.", value.ToString()), "ValueLeft")
End If
_ValueLeft = value
Me.OnValueChanged(EventArgs.Empty)
Me.OnLeftValueChanged(EventArgs.Empty)
Me.Invalidate()
End Set
End Property
Private _ValueRight As Integer
''' <summary>
''' Gets or sets the position of the right slider.
''' </summary>
''' <returns>The position of the right slider.</returns>
<Description("The position of the right slider.")> _
Public Property ValueRight() As Integer
Get
Return _ValueRight
End Get
Set(ByVal value As Integer)
If value < Me.Minimum OrElse value > Me.Maximum Then
Throw New ArgumentException(String.Format("Value of '{0}' is not valid for 'ValueRight'. 'ValueRight' should be between 'Minimum' and 'Maximum'.", value.ToString()), "ValueRight")
End If
If value < Me.ValueLeft Then
Throw New ArgumentException(String.Format("Value of '{0}' is not valid for 'ValueRight'. 'ValueRight' should be greater than or equal to 'ValueLeft'.", value.ToString()), "ValueLeft")
End If
_ValueRight = value
Me.OnValueChanged(EventArgs.Empty)
Me.OnRightValueChanged(EventArgs.Empty)
Me.Invalidate()
End Set
End Property
Private _Minimum As Integer
''' <summary>
''' Gets or sets the minimum value.
''' </summary>
''' <returns>The minimum value.</returns>
<Description("The minimum value.")> _
Public Property Minimum() As Integer
Get
Return _Minimum
End Get
Set(ByVal value As Integer)
If value >= Me.Maximum Then
Throw New ArgumentException(String.Format("Value of '{0}' is not valid for 'Minimum'. 'Minimum' should be less than 'Maximum'.", value.ToString()), "Minimum")
End If
_Minimum = value
Me.Invalidate()
End Set
End Property
Private _Maximum As Integer
''' <summary>
''' Gets or sets the maximum value.
''' </summary>
''' <returns>The maximum value.</returns>
<Description("The maximum value.")> _
Public Property Maximum() As Integer
Get
Return _Maximum
End Get
Set(ByVal value As Integer)
If value <= Me.Minimum Then
Throw New ArgumentException(String.Format("Value of '{0}' is not valid for 'Maximum'. 'Maximum' should be greater than 'Minimum'.", value.ToString()), "Maximum")
End If
_Maximum = value
Me.Invalidate()
End Set
End Property
Private _Orientation As Orientation
''' <summary>
''' Gets or sets the orientation of the control.
''' </summary>
''' <returns>The orientation of the control.</returns>
<Description("The orientation of the control.")> _
Public Property Orientation() As Orientation
Get
Return _Orientation
End Get
Set(ByVal value As Orientation)
_Orientation = value
End Set
End Property
Private _SmallChange As Integer
''' <summary>
''' Gets or sets the amount of positions the closest slider moves when the control is clicked.
''' </summary>
''' <returns>The amount of positions the closest slider moves when the control is clicked.</returns>
<Description("The amount of positions the closest slider moves when the control is clicked.")> _
Public Property SmallChange() As Integer
Get
Return _SmallChange
End Get
Set(ByVal value As Integer)
_SmallChange = value
End Set
End Property
Private ReadOnly Property RelativeValueLeft() As Double
Get
Dim diff As Double = Me.Maximum - Me.Minimum
Return If(diff = 0, Me.ValueLeft, Me.ValueLeft / diff)
End Get
End Property
Private ReadOnly Property RelativeValueRight() As Double
Get
Dim diff As Double = Me.Maximum - Me.Minimum
Return If(diff = 0, Me.ValueLeft, Me.ValueRight / diff)
End Get
End Property
#End Region
#Region " Methods "
Public Sub IncrementLeft()
Dim newValue As Integer = Math.Min(Me.ValueLeft + 1, Me.Maximum)
If Me.IsValidValueLeft(newValue) Then
Me.ValueLeft = newValue
End If
Me.Invalidate()
End Sub
Public Sub IncrementRight()
Dim newValue As Integer = Math.Min(Me.ValueRight + 1, Me.Maximum)
If Me.IsValidValueRight(newValue) Then
Me.ValueRight = newValue
End If
Me.Invalidate()
End Sub
Public Sub DecrementLeft()
Dim newValue As Integer = Math.Max(Me.ValueLeft - 1, Me.Minimum)
If Me.IsValidValueLeft(newValue) Then
Me.ValueLeft = newValue
End If
Me.Invalidate()
End Sub
Public Sub DecrementRight()
Dim newValue As Integer = Math.Max(Me.ValueRight - 1, Me.Minimum)
If Me.IsValidValueRight(newValue) Then
Me.ValueRight = newValue
End If
Me.Invalidate()
End Sub
Private Function IsValidValueLeft(ByVal value As Integer) As Boolean
Return (value >= Me.Minimum AndAlso value <= Me.Maximum AndAlso value < Me.ValueRight)
End Function
Private Function IsValidValueRight(ByVal value As Integer) As Boolean
Return (value >= Me.Minimum AndAlso value <= Me.Maximum AndAlso value > Me.ValueLeft)
End Function
Private Function GetLeftThumbRectangle(Optional ByVal g As Graphics = Nothing) As Rectangle
Dim shouldDispose As Boolean = (g Is Nothing)
If shouldDispose Then g = Me.CreateGraphics()
Dim rect As Rectangle = Me.GetThumbRectangle(Me.RelativeValueLeft, g)
If shouldDispose Then g.Dispose()
Return rect
End Function
Private Function GetRightThumbRectangle(Optional ByVal g As Graphics = Nothing) As Rectangle
Dim shouldDispose As Boolean = (g Is Nothing)
If shouldDispose Then g = Me.CreateGraphics()
Dim rect As Rectangle = Me.GetThumbRectangle(Me.RelativeValueRight, g)
If shouldDispose Then g.Dispose()
Return rect
End Function
Private Function GetThumbRectangle(ByVal relativeValue As Double, ByVal g As Graphics) As Rectangle
Dim size As Size = TrackBarRenderer.GetBottomPointingThumbSize(g, VisualStyles.TrackBarThumbState.Normal)
Dim border As Integer = CInt(size.Width / 2)
Dim w As Integer = Me.GetTrackRectangle(border).Width
Dim x As Integer = CInt(Math.Abs(Me.Minimum) / (Me.Maximum - Me.Minimum) * w + relativeValue * w)
Dim y As Integer = CInt((Me.Height - size.Height) / 2)
Return New Rectangle(New Point(x, y), size)
End Function
Private Function GetTrackRectangle(ByVal border As Integer) As Rectangle
'TODO: Select Case for hor/ver
Return New Rectangle(border, CInt(Me.Height / 2) - 3, Me.Width - 2 * border - 1, 4)
End Function
Private Function GetClosestSlider(ByVal point As Point) As Thumbs
Dim leftThumbRect As Rectangle = Me.GetLeftThumbRectangle()
Dim rightThumbRect As Rectangle = Me.GetRightThumbRectangle()
If Me.Orientation = Windows.Forms.Orientation.Horizontal Then
If Math.Abs(leftThumbRect.X - point.X) > Math.Abs(rightThumbRect.X - point.X) _
AndAlso Math.Abs(leftThumbRect.Right - point.X) > Math.Abs(rightThumbRect.Right - point.X) Then
Return Thumbs.Right
Else
Return Thumbs.Left
End If
Else
If Math.Abs(leftThumbRect.Y - point.Y) > Math.Abs(rightThumbRect.Y - point.Y) _
AndAlso Math.Abs(leftThumbRect.Bottom - point.Y) > Math.Abs(rightThumbRect.Bottom - point.Y) Then
Return Thumbs.Right
Else
Return Thumbs.Left
End If
End If
End Function
Private Sub SetThumbState(ByVal location As Point, ByVal newState As VisualStyles.TrackBarThumbState)
Dim leftThumbRect As Rectangle = Me.GetLeftThumbRectangle()
Dim rightThumbRect As Rectangle = Me.GetRightThumbRectangle()
If leftThumbRect.Contains(location) Then
leftThumbState = newState
Else
If Me.SelectedThumb = Thumbs.Left Then
leftThumbState = VisualStyles.TrackBarThumbState.Hot
Else
leftThumbState = VisualStyles.TrackBarThumbState.Normal
End If
End If
If rightThumbRect.Contains(location) Then
rightThumbState = newState
Else
If Me.SelectedThumb = Thumbs.Right Then
rightThumbState = VisualStyles.TrackBarThumbState.Hot
Else
rightThumbState = VisualStyles.TrackBarThumbState.Normal
End If
End If
End Sub
Protected Overrides Sub OnMouseMove(ByVal e As System.Windows.Forms.MouseEventArgs)
MyBase.OnMouseMove(e)
Me.SetThumbState(e.Location, VisualStyles.TrackBarThumbState.Hot)
Dim offset As Integer = CInt(e.Location.X / (Me.Width) * (Me.Maximum - Me.Minimum))
Dim newValue As Integer = Me.Minimum + offset
If draggingLeft Then
If Me.IsValidValueLeft(newValue) Then Me.ValueLeft = newValue
ElseIf draggingRight Then
If Me.IsValidValueRight(newValue) Then Me.ValueRight = newValue
End If
Me.Invalidate()
End Sub
Protected Overrides Sub OnMouseDown(ByVal e As System.Windows.Forms.MouseEventArgs)
MyBase.OnMouseDown(e)
Me.Focus()
Me.SetThumbState(e.Location, VisualStyles.TrackBarThumbState.Pressed)
draggingLeft = (leftThumbState = VisualStyles.TrackBarThumbState.Pressed)
If Not draggingLeft Then draggingRight = (rightThumbState = VisualStyles.TrackBarThumbState.Pressed)
If draggingLeft Then
Me.SelectedThumb = Thumbs.Left
ElseIf draggingRight Then
Me.SelectedThumb = Thumbs.Right
End If
If Not draggingLeft AndAlso Not draggingRight Then
If Me.GetClosestSlider(e.Location) = 1 Then
If e.X < Me.GetLeftThumbRectangle().X Then
Me.DecrementLeft()
Else
Me.IncrementLeft()
End If
Me.SelectedThumb = Thumbs.Left
Else
If e.X < Me.GetRightThumbRectangle().X Then
Me.DecrementRight()
Else
Me.IncrementRight()
End If
Me.SelectedThumb = Thumbs.Right
End If
End If
Me.Invalidate()
End Sub
Protected Overrides Sub OnMouseUp(ByVal e As System.Windows.Forms.MouseEventArgs)
MyBase.OnMouseUp(e)
draggingLeft = False
draggingRight = False
Me.Invalidate()
End Sub
Protected Overrides Sub OnMouseWheel(ByVal e As System.Windows.Forms.MouseEventArgs)
MyBase.OnMouseWheel(e)
If e.Delta = 0 Then Return
If Me.SelectedThumb = 1 Then
If e.Delta > 0 Then
Me.IncrementLeft()
Else
Me.DecrementLeft()
End If
ElseIf Me.SelectedThumb = 2 Then
If e.Delta > 0 Then
Me.IncrementRight()
Else
Me.DecrementRight()
End If
End If
End Sub
Protected Overrides Sub OnPaint(ByVal e As System.Windows.Forms.PaintEventArgs)
MyBase.OnPaint(e)
Dim thumbSize As Size = Me.GetThumbRectangle(0, e.Graphics).Size
Dim trackRect As Rectangle = Me.GetTrackRectangle(CInt(thumbSize.Width / 2))
Dim ticksRect As Rectangle = trackRect
ticksRect.Offset(0, -15) 'changed to -15 to place ticks at the top
'added this to keep ticks at a decent spacing
Dim tickspacing As Integer = CInt((Me.Maximum - Me.Minimum) / 10) + 1
TrackBarRenderer.DrawHorizontalTrack(e.Graphics, trackRect)
TrackBarRenderer.DrawHorizontalTicks(e.Graphics, ticksRect, tickspacing, VisualStyles.EdgeStyle.Etched)
'Changed these to draw the top pointing thumb button
TrackBarRenderer.DrawTopPointingThumb(e.Graphics, Me.GetLeftThumbRectangle(e.Graphics), leftThumbState)
TrackBarRenderer.DrawTopPointingThumb(e.Graphics, Me.GetRightThumbRectangle(e.Graphics), rightThumbState)
End Sub
#End Region
#Region " Events "
Public Event ValueChanged As EventHandler
Public Event LeftValueChanged As EventHandler
Public Event RightValueChanged As EventHandler
Protected Overridable Sub OnValueChanged(ByVal e As EventArgs)
RaiseEvent ValueChanged(Me, e)
End Sub
Protected Overridable Sub OnLeftValueChanged(ByVal e As EventArgs)
RaiseEvent LeftValueChanged(Me, e)
End Sub
Protected Overridable Sub OnRightValueChanged(ByVal e As EventArgs)
RaiseEvent RightValueChanged(Me, e)
End Sub
#End Region
End Class
If you say it can`t be done then i`ll try it

HOW TO MAKE A BOOLEAN FUNCTION IN LABVIEW5.0

I want to use a boolean funtion but it does not exist in existing functions?so how can I do it?I final aim is how to make a VALVE boolean function and how to use it?please teach me,experts! Thank you very much!

Hi,
what do you mean by "boolean function"?
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How to make screen field enable when table control gives an error

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Thanks for your response, but issue is - how to make other screen fields enable when there was an error in the table control data.
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How to make users to select the date from calendar control my making the date field read only in date time control in external list in sharepoint 2010

How to make users to select the date from calendar control only, by my making the date text field read only (don't want to let users type the date) in date time control in external list in sharepoint 2010. I am looking for a solution which can
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Congratulate you got the solution by yourself. I am new to a
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