Visual Basic Source Code/Visual Basic Source Code.iso/vbsource/joystick/calibrat.bas

BASIC Source File | 1993-09-05 | 6KB | 236 lines

DefInt A-Z

Sub calibrate (thisform As Form)
'***********************************
' calibrate the joystick to a form
'***********************************
Static busy As Integer

On Error GoTo errorhandler
If busy = True Then Exit Sub
busy = True
FORM2.Show
restart:
' lower right
FORM2.Label1.Caption = "Move the joystick to the lower right position and press a button"
FORM2.Picture1(1).Visible = False
FORM2.Picture1(3).Visible = True
'wait for button
Do
    dummy = DoEvents()
Loop While button_mark = False
button_mark = False
ymax = 20000
xmax = 20000

'*******************************************
' If the x and y values do not convert to  *
' values that exactly match the current    *
' corner, adjust xmax and ymax so that     *
' x and y values convert to correct value  *
'*******************************************


Do

    convert calx, ymax, thisform
    If winpoint.x > winxmax Then
        If winpoint.x - winxmax > 100 Then
            xmax = xmax + 100
        Else
            xmax = xmax + 1
        End If
    ElseIf winpoint.x < winxmax Then
        If winxmax - winpoint.x > 100 Then
            xmax = xmax - 100
        Else
            xmax = xmax - 1
        End If
    End If
Loop While winpoint.x <> winxmax

Do
    convert xmax, caly, thisform
    'Debug.Print caly, ymax, winpoint.y, winymax
    If winpoint.y > winymax Then
        If winpoint.y - winymax > 100 Then
            ymax = ymax + 100
        Else
            ymax = ymax + 1
        End If
    ElseIf winpoint.y < winymax Then
        If winymax - winpoint.y > 100 Then
            ymax = ymax - 100
        Else
            ymax = ymax - 1
        End If
    End If
Loop While winpoint.y <> winymax

' lower left
FORM2.Label1.Caption = "Move the joystick to the lower left position and press a button"
FORM2.Picture1(3).Visible = False
FORM2.Picture1(2).Visible = True
Do
    dummy = DoEvents()
Loop While button_mark = False
button_mark = False
xmin = 0
Do
    convert calx, ymax, thisform
    If winpoint.x < winxmin Then
        If winxmax - winpoint.x > 100 Then
            xmax = xmax - 100
        Else
            xmax = xmax - 1
        End If

    ElseIf winpoint.x > winxmin Then
        If winpoint.x - winxmin > 100 Then
            xmax = xmax + 100
        Else
            xmax = xmax + 1
        End If
    End If
Loop While winpoint.x <> winxmin

If caly < ymax Then
    Do
        convert xmin, caly, thisform
        If winpoint.y > winymax Then
            If winpoint.y - winymax > 100 Then
                ymax = ymax + 100
            Else
                ymax = ymax + 1
            End If
        ElseIf winpoint.y < winymax Then
            If winymax - winpoint.y > 100 Then
                ymax = ymax - 100
            Else
                ymax = ymax - 1
            End If

        End If
    Loop While winpoint.y <> winymax
End If

button_mark = False


' upper left
FORM2.Label1.Caption = "Move the joystick to the upper left position and press a button"
FORM2.Picture1(2).Visible = False
FORM2.Picture1(0).Visible = True
Do
    dummy = DoEvents()
Loop While button_mark = False
button_mark = False
ymin = 0
Do
    convert calx, ymin, thisform
    If winpoint.x < winxmin Then
        If winxmin - winpoint.x > 100 Then
            xmax = xmax - 100
        Else
            xmax = xmax - 1
        End If
    ElseIf winpoint.x > winxmin Then
        If winpoint.x - winxmin > 100 Then
            xmax = xmax + 100
        Else
            xmax = xmax + 1
        End If
    End If
Loop While winpoint.x <> winxmin
If caly < ymin Then
    Do
        convert xmin, caly, thisform
        Debug.Print caly, ymin, winpoint.y, winymin
        If winpoint.y > winymin Then
            If winpoint.y - winymin > 100 Then
                ymin = ymin - 100
            Else
                ymin = ymin - 1
            End If
        ElseIf winpoint.y < winymin Then
            If winymin - winpoint.y > 100 Then
                ymin = ymin + 100
            Else
                ymin = ymin + 1
            End If
        End If
    Loop While winpoint.y <> winymin
End If

' upper right
FORM2.Label1.Caption = "Move the joystick to the upper right position and press a button"
FORM2.Picture1(0).Visible = False
FORM2.Picture1(1).Visible = True

Do
    dummy = DoEvents()
Loop While button_mark = False
button_mark = False
If calx < xmax Then
    Do
        convert calx, ymin, thisform
        If winpoint.x > winxmax Then
            If winpoint.x - winxmax > 100 Then
                xmax = xmax + 100
            Else
                xmax = xmax + 1
            End If
        ElseIf winpoint.x < winxmax Then
            If winxmax - winpoint.x > 100 Then
                xmax = xmax - 100
            Else
                xmax = xmax - 1
            End If
        End If
    Loop While winpoint.x <> winxmax
End If

If caly < ymin Then
    Do
        convert xmax, caly, thisform
        If winpoint.y > winymin Then
            If winpoint.y - winymin > 100 Then
                ymin = ymin - 100
            Else
                ymin = ymin - 1
            End If
        ElseIf winpoint.y < winymin Then
            If winymin - winpoint.y > 100 Then
                ymin = ymin + 100
            Else
                ymin = ymin + 1
            End If
        End If
    Loop While winpoint.y <> winymin
End If
FORM2.Picture1(3).Visible = False



busy = False
need_calibrate = False
On Error GoTo 0' disable error handler
Unload FORM2
Exit Sub

errorhandler:
If Err = 6 Then 'Overflow-button pressed in wrong place
    msg$ = "An error has occurred during Calibration." + Chr$(13) + Chr$(10)
    msg$ = msg$ + "Calibration will now restart"
    MsgBox msg$, 49, "Calibrating Joystick"
    Resume restart
Else
    msg$ = "An unexpected error has occurred:" + Chr$(13) + Chr$(10)
    msg$ = msg$ + Error$ + Chr$(13) + Chr$(10)
    msg$ = msg$ + "The program will now terminate"
    MsgBox msg$, 16, "Calibrating Joystick"
    End
End If
End Sub