Can scroll bar store decimals?

[mattscotney]

Hi all,

How do I change the type of a horizontal scroll bar value type (hsb.value) so it can accept decimal numbers?

I have tried assigning decimals to the hsb like this:
hsb.value = 3.5 but the value that gets stored in the hsb is 4. How can I make the hsb store decimal numbers?

Thanks

 

[sunaj]

Hi,

A very crude example illustrating how you can simply multiply/divide by 10^NumberOfDecimals (in your case 10, in my example 100 for 2 decimals) to implement decimals:
form code
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Dim MyScrollBar As New DecimalScrollBar()
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Me.Controls.Add(MyScrollBar)
MyScrollBar.DecimalMaximum = 100
MyScrollBar.DecimalValue = 3.45
End Sub

Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
MessageBox.Show(MyScrollBar.DecimalValue.ToString)
End Sub
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New scrollbar class
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Public Class DecimalScrollBar
Inherits HScrollBar
Const DecFact As Int32 = 100
Public Property DecimalValue() As Single
Get
DecimalValue = Convert.ToSingle(MyBase.Value / DecFact)
End Get
Set(ByVal Value As Single)
MyBase.Value = Convert.ToInt32(Value * DecFact)
End Set
End Property
Public Property DecimalMaximum() As Single
Get
DecimalMaximum = Convert.ToSingle(MyBase.Maximum / DecFact)
End Get
Set(ByVal Value As Single)
MyBase.Maximum = Convert.ToInt32(Value * DecFact)
End Set
End Property
End Class
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You should add error handling, change the DecFact constant to a property with an initial value etc.

Sunaj
'The gap between theory and practice is not as wide in theory as it is in practice'

 

[chiph]

In short.... No.

The scrollbar only stores integral values (whole numbers), so you would have to do a trick like Sunaj says and multiply your decimal number by 10 or 100 to make it a whole number.

Chip H.


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