Imports System.Windows.Interop

Public Class Keyboard

   ' '' Codice che permette di mantenere le proporzioni(Aspect Ratio) della finestra dopo l'ingrondimento o rimpicciolimento della stessa

   ''Public Const ASPECTRATIO As Double = 12 / 5

   ''Protected Overrides Sub OnSourceInitialized(e As EventArgs)
   ''   MyBase.OnSourceInitialized(e)
   ''   Dim source As HwndSource = TryCast(HwndSource.FromVisual(Me), HwndSource)
   ''   If source IsNot Nothing Then
   ''      source.AddHook(New HwndSourceHook(AddressOf WinProc))
   ''   End If
   ''End Sub

   ''Public Const WM_EXITSIZEMOVE As Integer = &H232

   ''Private Function WinProc(hwnd As IntPtr, msg As Int32, wParam As IntPtr, lParam As IntPtr, ByRef handled As [Boolean]) As IntPtr
   ''   Dim result As IntPtr = IntPtr.Zero
   ''   Select Case msg
   ''      Case WM_EXITSIZEMOVE
   ''         If True Then
   ''            Me.Width = Me.Height * ASPECTRATIO
   ''            Exit Select
   ''         End If
   ''   End Select

   ''   Return result
   ''End Function

   Private m_MainWindow As MainWindow = Application.Current.MainWindow
   Friend m_StringResult As String = String.Empty
   Friend m_CurrTxBx As TextBox
   Friend m_CurrentLbl As String = String.Empty

   ' Variabili che contengono lo stato dei tasti Shift, Alt, Caps Lock
   Private m_bShift As Boolean = False
   Private m_bAlt As Boolean = False
   Private m_CapsLock As Boolean = False

   Sub New()
      ' This call is required by the designer.
      InitializeComponent()
      ' Altre inizializzazioni
      Owner = m_MainWindow
      ' Imposto Dimensioni e posizione della tastiera
      Top = m_MainWindow.Top + (m_MainWindow.Height / 2 - Height / 2)
      Left = m_MainWindow.Left + (m_MainWindow.Width / 2 - Width / 2)
   End Sub

   Sub New(ByVal sTitle As String, ByVal sValue As String, Optional ByVal CurrentTxBx As TextBox = Nothing)
      ' This call is required by the designer.
      InitializeComponent()
      ' Altre inizializzazioni
      Owner = m_MainWindow
      CurrNameTxBl.Text = sTitle
      CurrTextTxBx.Text = sValue
      ' Text box per valore di ritorno
      m_CurrTxBx = CurrentTxBx
      ' Imposto Dimensioni e posizione della tastiera
      Top = m_MainWindow.Top + (m_MainWindow.Height / 2 - Height / 2)
      Left = m_MainWindow.Left + (m_MainWindow.Width / 2 - Width / 2)
   End Sub

   'Evita che venga selezionato il testo all'interno della textbox
   Private Sub CurrTextTxBx_PreviewMouseDown(sender As Object, e As MouseButtonEventArgs) Handles CurrTextTxBx.PreviewMouseDown
      e.Handled = True
      CurrTextTxBx.SelectedText = String.Empty
   End Sub

   Private Sub OkBtn_Click(sender As Object, e As RoutedEventArgs) Handles OkBtn.Click
      m_StringResult = CurrTextTxBx.Text
      If Not IsNothing(m_CurrTxBx) Then
         m_CurrTxBx.Text = CurrTextTxBx.Text
      End If
      Me.DialogResult = True
      Me.Close()
   End Sub

   Private Sub ExitBtn_Click(sender As Object, e As RoutedEventArgs) Handles ExitBtn.Click
      m_StringResult = String.Empty
      Me.DialogResult = False
      Me.Close()
   End Sub

   Private Sub UpperLowerCase(Value As Boolean)
      If Value Then
         qBtn.Content = "Q"
         wBtn.Content = "W"
         eBtn.Content = "E"
         rBtn.Content = "R"
         tBtn.Content = "T"
         yBtn.Content = "Y"
         uBtn.Content = "U"
         iBtn.Content = "I"
         oBtn.Content = "O"
         pBtn.Content = "P"
         aBtn.Content = "A"
         sBtn.Content = "S"
         dBtn.Content = "D"
         fBtn.Content = "F"
         gBtn.Content = "G"
         hBtn.Content = "H"
         jBtn.Content = "J"
         kBtn.Content = "K"
         lBtn.Content = "L"
         zBtn.Content = "Z"
         xBtn.Content = "X"
         cBtn.Content = "C"
         vBtn.Content = "V"
         bBtn.Content = "B"
         nBtn.Content = "N"
         mBtn.Content = "M"
      Else
         qBtn.Content = "q"
         wBtn.Content = "w"
         eBtn.Content = "e"
         rBtn.Content = "r"
         tBtn.Content = "t"
         yBtn.Content = "y"
         uBtn.Content = "u"
         iBtn.Content = "i"
         oBtn.Content = "o"
         pBtn.Content = "p"
         aBtn.Content = "a"
         sBtn.Content = "s"
         dBtn.Content = "d"
         fBtn.Content = "f"
         gBtn.Content = "g"
         hBtn.Content = "h"
         jBtn.Content = "j"
         kBtn.Content = "k"
         lBtn.Content = "l"
         zBtn.Content = "z"
         xBtn.Content = "x"
         cBtn.Content = "c"
         vBtn.Content = "v"
         bBtn.Content = "b"
         nBtn.Content = "n"
         mBtn.Content = "m"
      End If
   End Sub

   ' Tasti azione
   Private Sub ShiftBtn_Click(sender As Object, e As RoutedEventArgs) Handles Shift1Btn.Click, Shift2Btn.Click
      If m_bShift Then
         m_bShift = False
         UpperLowerCase(False)
         Shift1Btn.IsChecked = False
         Shift2Btn.IsChecked = False
      Else
         m_bShift = True
         If m_CapsLock Then
            UpperLowerCase(False)
         Else
            UpperLowerCase(True)
         End If
         Shift1Btn.IsChecked = True
         Shift2Btn.IsChecked = True
      End If
   End Sub

   Private Sub CapsLockBtn_Click(sender As Object, e As RoutedEventArgs) Handles CapsLockBtn.Click
      If m_CapsLock Then
         If m_bShift Then
            UpperLowerCase(True)
         Else
            UpperLowerCase(False)
         End If
         m_CapsLock = False
         CapsLockBtn.IsChecked = False
      Else
         If m_bShift Then
            m_bShift = False
            Shift1Btn.IsChecked = False
            Shift2Btn.IsChecked = False
         End If
         m_CapsLock = True
         UpperLowerCase(True)
         CapsLockBtn.IsChecked = True
      End If
   End Sub

   Private Sub AltBtn_Click(sender As Object, e As RoutedEventArgs) Handles AltBtn.Click, AltGrBtn.Click
      'Per il momento non fa' nulla
   End Sub

   ' Funzione che gestisce il click di una lettera
   Private Sub LetterClick(Uppercase As Char, Lowercase As Char)
      If m_CapsLock Then
         If m_bShift Then
            CurrTextTxBx.Text &= Lowercase
            m_bShift = False
            UpperLowerCase(True)
            Shift1Btn.IsChecked = False
            Shift2Btn.IsChecked = False
         Else
            CurrTextTxBx.Text &= Uppercase
         End If
      Else
         If m_bShift Then
            CurrTextTxBx.Text &= Uppercase
            m_bShift = False
            UpperLowerCase(False)
            Shift1Btn.IsChecked = False
            Shift2Btn.IsChecked = False
         Else
            CurrTextTxBx.Text &= Lowercase
         End If
      End If
   End Sub

   ' Funzione che gestisce il click di numeri e simboli
   Private Sub NumberClick(Uppercase As Char, Lowercase As Char)
      If m_bShift Then
         If m_CapsLock Then
            UpperLowerCase(True)
         Else
            UpperLowerCase(False)
         End If
         CurrTextTxBx.Text &= Uppercase
         m_bShift = False
         Shift1Btn.IsChecked = False
         Shift2Btn.IsChecked = False
      Else
         CurrTextTxBx.Text &= Lowercase
      End If
   End Sub

   Private Sub BackslashBtn_Click(sender As Object, e As RoutedEventArgs) Handles BackslashBtn.Click
      NumberClick("|", "\")
   End Sub

   Private Sub OneBtn_Click(sender As Object, e As RoutedEventArgs) Handles OneBtn.Click
      NumberClick("!", "1")
   End Sub

   Private Sub TwoBtn_Click(sender As Object, e As RoutedEventArgs) Handles TwoBtn.Click
      NumberClick("""", "2")
   End Sub

   Private Sub ThreeBtn_Click(sender As Object, e As RoutedEventArgs) Handles ThreeBtn.Click
      NumberClick("£", "3")
   End Sub

   Private Sub FourBtn_Click(sender As Object, e As RoutedEventArgs) Handles FourBtn.Click
      NumberClick("$", "4")
   End Sub

   Private Sub FiveBtn_Click(sender As Object, e As RoutedEventArgs) Handles FiveBtn.Click
      NumberClick("%", "5")
   End Sub

   Private Sub SixBtn_Click(sender As Object, e As RoutedEventArgs) Handles SixBtn.Click
      NumberClick("&", "6")
   End Sub

   Private Sub SevenBtn_Click(sender As Object, e As RoutedEventArgs) Handles SevenBtn.Click
      NumberClick("/", "7")
   End Sub

   Private Sub EightBtn_Click(sender As Object, e As RoutedEventArgs) Handles EightBtn.Click
      NumberClick("(", "8")
   End Sub

   Private Sub NineBtn_Click(sender As Object, e As RoutedEventArgs) Handles NineBtn.Click
      NumberClick(")", "9")
   End Sub

   Private Sub ZeroBtn_Click(sender As Object, e As RoutedEventArgs) Handles ZeroBtn.Click
      NumberClick("=", "0")
   End Sub

   Private Sub BackspaceBtn_Click(sender As Object, e As RoutedEventArgs) Handles BackspaceBtn.Click
      If CurrTextTxBx.Text = String.Empty Then
         Return
      Else
         CurrTextTxBx.Text = CurrTextTxBx.Text.Substring(0, CurrTextTxBx.Text.Length - 1)
      End If
   End Sub

   Private Sub TabBtn_Click(sender As Object, e As RoutedEventArgs) Handles TabBtn.Click

   End Sub

   Private Sub qBtn_Click(sender As Object, e As RoutedEventArgs) Handles qBtn.Click
      LetterClick("Q", "q")
   End Sub

   Private Sub wBtn_Click(sender As Object, e As RoutedEventArgs) Handles wBtn.Click
      LetterClick("W", "w")
   End Sub

   Private Sub eBtn_Click(sender As Object, e As RoutedEventArgs) Handles eBtn.Click
      LetterClick("E", "e")
   End Sub

   Private Sub rBtn_Click(sender As Object, e As RoutedEventArgs) Handles rBtn.Click
      LetterClick("R", "r")
   End Sub

   Private Sub tBtn_Click(sender As Object, e As RoutedEventArgs) Handles tBtn.Click
      LetterClick("T", "t")
   End Sub

   Private Sub yBtn_Click(sender As Object, e As RoutedEventArgs) Handles yBtn.Click
      LetterClick("Y", "y")
   End Sub

   Private Sub uBtn_Click(sender As Object, e As RoutedEventArgs) Handles uBtn.Click
      LetterClick("U", "u")
   End Sub

   Private Sub iBtn_Click(sender As Object, e As RoutedEventArgs) Handles iBtn.Click
      LetterClick("I", "i")
   End Sub

   Private Sub oBtn_Click(sender As Object, e As RoutedEventArgs) Handles oBtn.Click
      LetterClick("O", "o")
   End Sub

   Private Sub pBtn_Click(sender As Object, e As RoutedEventArgs) Handles pBtn.Click
      LetterClick("P", "p")
   End Sub

   Private Sub Enter1Btn_Click(sender As Object, e As RoutedEventArgs) Handles Enter1Btn.Click

   End Sub

   Private Sub aBtn_Click(sender As Object, e As RoutedEventArgs)
      LetterClick("A", "a")
   End Sub

   Private Sub sBtn_Click(sender As Object, e As RoutedEventArgs) Handles sBtn.Click
      LetterClick("S", "s")
   End Sub

   Private Sub dBtn_Click(sender As Object, e As RoutedEventArgs) Handles dBtn.Click
      LetterClick("D", "d")
   End Sub

   Private Sub fBtn_Click(sender As Object, e As RoutedEventArgs) Handles fBtn.Click
      LetterClick("F", "f")
   End Sub

   Private Sub gBtn_Click(sender As Object, e As RoutedEventArgs) Handles gBtn.Click
      LetterClick("G", "g")
   End Sub

   Private Sub hBtn_Click(sender As Object, e As RoutedEventArgs) Handles hBtn.Click
      LetterClick("H", "h")
   End Sub

   Private Sub jBtn_Click(sender As Object, e As RoutedEventArgs) Handles jBtn.Click
      LetterClick("J", "j")
   End Sub

   Private Sub kBtn_Click(sender As Object, e As RoutedEventArgs) Handles kBtn.Click
      LetterClick("K", "k")
   End Sub

   Private Sub lBtn_Click(sender As Object, e As RoutedEventArgs) Handles lBtn.Click
      LetterClick("L", "l")
   End Sub

   Private Sub PlusBtn_Click(sender As Object, e As RoutedEventArgs) Handles PlusBtn.Click
      NumberClick("*", "+")
   End Sub

   Private Sub Enter2Btn_Click(sender As Object, e As RoutedEventArgs) Handles Enter2Btn.Click

   End Sub

   Private Sub MinorBtn_Click(sender As Object, e As RoutedEventArgs) Handles MinorBtn.Click
      NumberClick(">", "<")
   End Sub

   Private Sub zBtn_Click(sender As Object, e As RoutedEventArgs) Handles zBtn.Click
      LetterClick("Z", "z")
   End Sub

   Private Sub xBtn_Click(sender As Object, e As RoutedEventArgs) Handles xBtn.Click
      LetterClick("X", "x")
   End Sub

   Private Sub cBtn_Click(sender As Object, e As RoutedEventArgs) Handles cBtn.Click
      LetterClick("C", "c")
   End Sub

   Private Sub vBtn_Click(sender As Object, e As RoutedEventArgs) Handles vBtn.Click
      LetterClick("V", "v")
   End Sub

   Private Sub bBtn_Click(sender As Object, e As RoutedEventArgs) Handles bBtn.Click
      LetterClick("B", "b")
   End Sub

   Private Sub nBtn_Click(sender As Object, e As RoutedEventArgs) Handles nBtn.Click
      LetterClick("N", "n")
   End Sub

   Private Sub mBtn_Click(sender As Object, e As RoutedEventArgs) Handles mBtn.Click
      LetterClick("M", "m")
   End Sub

   Private Sub MinusBtn_Click(sender As Object, e As RoutedEventArgs) Handles MinusBtn.Click
      NumberClick("_", "-")
   End Sub

   Private Sub DotBtn_Click(sender As Object, e As RoutedEventArgs) Handles DotBtn.Click
      NumberClick(":", ".")
   End Sub

   Private Sub CommaBtn_Click(sender As Object, e As RoutedEventArgs) Handles CommaBtn.Click
      NumberClick(";", ",")
   End Sub

   Private Sub SpaceBtn_Click(sender As Object, e As RoutedEventArgs) Handles SpaceBtn.Click
      CurrTextTxBx.Text &= " "
   End Sub

   Private Sub ClearBtn_Click(sender As Object, e As RoutedEventArgs) Handles ClearBtn.Click
      CurrTextTxBx.Text = String.Empty
   End Sub

End Class