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tunleader

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  • "tunleader" is 32 years old today
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Date of registration: Mar 21st 2011

Location: Tunisia

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1

Thursday, March 24th 2011, 10:09am

Class

Hi,
could someone introduce an example of class in Jabaco. I couldn't find one using the search facilty.
So PLZ help.
thx in advance
:)

A1880

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Location: Hanover, Germany

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2

Thursday, March 24th 2011, 1:37pm

It might help to look at a sample

Keywords to look for using the search facility: constructor, inheritance, base, parent

Jabaco is supporting an extended class concept compared to VB6.
The extension includes: classes can inherit from other classes, class interfaces

Greetings

A1880

tunleader

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3

Thursday, March 24th 2011, 9:24pm

Thanks that was helpful.
But is it possible to implement an interface with Jabaco.
sorry for these silly question but I'm a java programmer and my Vb knowledge is about zero but Jabaco seems to be very promising ... .
Hope Jabaco will continue I like it a lot ... . ^^

A1880

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4

Thursday, March 24th 2011, 10:39pm

Here is an example of an interface names "IUReset":

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Public Function description() As String

End Function

Public Sub reset()

End Sub

Public Function query() As String

End Function


And here is an implementation:

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Implements IUCreset

Private initCalls As Integer 
Private dbField As String

Public Sub Init(left As Integer, top As Integer, width As Integer, caption As String, field As String)
   initCalls = initCalls + 1
   
   If initCalls = 1 Then
      dbField = field
      Me.Height = 27
      Me.BackColor = myForm1.BackColor 

      Label1.Caption = " " & caption
      Text1.Text = ""
      
      If field <> "" Then
         Text1.ToolTip = "Textfeld " & caption & " (Datenbankfeld '" & field & "')"
      Else
         Text1.ToolTip = "Textfeld " & caption
      End If

      myForm1.registerUsercontrol Me 
   End If 

   Me.Left = left
   Me.Top = top
   Me.Width = width
   resize
End Sub

Public Function query() As String
   Dim s As String = ""
   Dim t As String = Trim(Text1.Text)
   Dim op As String = "="
   
   If t <> "" Then
      t = Replace(t, "*", "%")
      t = Replace(t, "?", "_")
      
      If (InStr(t, "%") > 0) Or (InStr(t, "_") > 0) Then
         op = "LIKE"
      End If
      
      s = "( " & dbField & " " & op & " '" & t & "' )" & vbCrLf
   End If
   
   query = s
End Function

Public Function description() As String
   Dim s As String = ""
   Dim t As String = Trim(Text1.Text)
   
   If t <> "" Then      
      s = Trim(Label1.Caption) & " = '#MA" & t & "#MB'"
   End If
   
   description = s
End Function

Private Sub resize()
   Const xGap = 5
   Const yGap = 5
   Const h = 17

   Label1.Width = (Me.Width - 2 * xGap) / 2
   Label1.Left = 0
   Text1.Left = Label1.Left + Label1.Width + xGap
   Text1.Width = Label1.Width - Picture1.Width - 2 * xGap
   Picture1.Left = Me.Width - Picture1.Width - xGap
   
   Label1.Height = h
   Text1.Height = h
   
   Label1.Top = yGap
   Text1.Top = Label1.Top
   Picture1.Top = Label1.Top + (h - Picture1.Height)/2
End Sub

Public Sub Picture1_Click()
   reset
End Sub

Public Sub reset
   Text1.Text = ""
End Sub


Greetings!

A1880

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