ShiftOS/ShiftOS/Snakey.vb

Imports System.Drawing.Drawing2D

Public Class Snakey

    Public rolldownsize As Integer
    Public oldbordersize As Integer
    Public oldtitlebarheight As Integer
    Public justopened As Boolean = False
    Public needtorollback As Boolean = False
    Public minimumsizewidth As Integer = 673   'replace with minimum size
    Public minimumsizeheight As Integer = 507  'replace with minimum size

#Region "Template Code"

    Private Sub Template_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        justopened = True
        Me.Left = (Screen.PrimaryScreen.Bounds.Width - Me.Width) / 2
        Me.Top = (Screen.PrimaryScreen.Bounds.Height - Me.Height) / 2
        setupall()

        ShiftOSDesktop.pnlpanelbuttondodge.SendToBack() 'CHANGE NAME
        ShiftOSDesktop.setuppanelbuttons()
        ShiftOSDesktop.setpanelbuttonappearnce(ShiftOSDesktop.pnlpanelbuttondodge, ShiftOSDesktop.tbdodgeicon, ShiftOSDesktop.tbdodgetext, True) 'modify to proper name
        ShiftOSDesktop.programsopen = ShiftOSDesktop.programsopen + 1
    End Sub

    Public Sub setupall()
        setuptitlebar()
        setupborders()
        setskin()
    End Sub

    Private Sub ShiftOSDesktop_keydown(sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles Me.KeyDown
        'Make terminal appear
        If e.KeyCode = Keys.T AndAlso e.Control Then
            Terminal.Show()
            Terminal.Visible = True
            Terminal.BringToFront()
        End If

        'Movable Windows
        If ShiftOSDesktop.boughtmovablewindows = True Then
            If e.KeyCode = Keys.A AndAlso e.Control Then
                e.Handled = True
                Me.Location = New Point(Me.Location.X - ShiftOSDesktop.movablewindownumber, Me.Location.Y)
            End If
            If e.KeyCode = Keys.D AndAlso e.Control Then
                e.Handled = True
                Me.Location = New Point(Me.Location.X + ShiftOSDesktop.movablewindownumber, Me.Location.Y)
            End If
            If e.KeyCode = Keys.W AndAlso e.Control Then
                e.Handled = True
                Me.Location = New Point(Me.Location.X, Me.Location.Y - ShiftOSDesktop.movablewindownumber)
            End If
            If e.KeyCode = Keys.S AndAlso e.Control Then
                e.Handled = True
                Me.Location = New Point(Me.Location.X, Me.Location.Y + ShiftOSDesktop.movablewindownumber)
            End If
            ShiftOSDesktop.log = ShiftOSDesktop.log & My.Computer.Clock.LocalTime & " User moved " & Me.Name & " to " & Me.Location.ToString & " with " & e.KeyCode.ToString & Environment.NewLine
        End If
    End Sub

    Private Sub titlebar_MouseDown(sender As Object, e As MouseEventArgs) Handles titlebar.MouseDown, lbtitletext.MouseDown, pnlicon.MouseDown, pgtoplcorner.MouseDown, pgtoprcorner.MouseDown
        ' Handle Draggable Windows
        If ShiftOSDesktop.boughtdraggablewindows = True Then
            If e.Button = MouseButtons.Left Then
                titlebar.Capture = False
                lbtitletext.Capture = False
                pnlicon.Capture = False
                pgtoplcorner.Capture = False
                pgtoprcorner.Capture = False
                Const WM_NCLBUTTONDOWN As Integer = &HA1S
                Const HTCAPTION As Integer = 2
                Dim msg As Message = _
                    Message.Create(Me.Handle, WM_NCLBUTTONDOWN, _
                        New IntPtr(HTCAPTION), IntPtr.Zero)
                Me.DefWndProc(msg)
            End If
            ShiftOSDesktop.log = ShiftOSDesktop.log & My.Computer.Clock.LocalTime & " User dragged " & Me.Name & " to " & Me.Location.ToString & Environment.NewLine
        End If
    End Sub

    Public Sub setupborders()
        If ShiftOSDesktop.boughtwindowborders = False Then
            pgleft.Hide()
            pgbottom.Hide()
            pgright.Hide()
            Me.Size = New Size(Me.Width - pgleft.Width - pgright.Width, Me.Height - pgbottom.Height)
        End If
    End Sub

    Private Sub closebutton_Click(sender As Object, e As EventArgs) Handles closebutton.Click
        Me.Close()
    End Sub

    Private Sub closebutton_MouseEnter(sender As Object, e As EventArgs) Handles closebutton.MouseEnter, closebutton.MouseUp
        closebutton.BackgroundImage = Skins.closebtnhover
    End Sub

    Private Sub closebutton_MouseLeave(sender As Object, e As EventArgs) Handles closebutton.MouseLeave
        closebutton.BackgroundImage = Skins.closebtn
    End Sub

    Private Sub closebutton_MouseDown(sender As Object, e As EventArgs) Handles closebutton.MouseDown
        closebutton.BackgroundImage = Skins.closebtnclick
    End Sub

    Private Sub minimizebutton_Click(sender As Object, e As EventArgs) Handles minimizebutton.Click
        ShiftOSDesktop.minimizeprogram(Me, False)
    End Sub

    'Old skinning system - No idea what this does
    ''Private Sub titlebar_MouseEnter(sender As Object, e As EventArgs) Handles titlebar.MouseEnter, titlebar.MouseUp, lbtitletext.MouseEnter, pnlicon.MouseEnter, closebutton.MouseEnter, rollupbutton.MouseEnter
    ''    If ShiftOSDesktop.skinimages(3) = ShiftOSDesktop.skinimages(4) Then  Else titlebar.BackgroundImage = ShiftOSDesktop.skintitlebar(1)
    ''End Sub

    'Private Sub titlebar_MouseLeave(sender As Object, e As EventArgs) Handles titlebar.MouseLeave, lbtitletext.MouseLeave, pnlicon.MouseLeave, closebutton.MouseLeave, rollupbutton.MouseLeave
    '    If ShiftOSDesktop.skinimages(3) = ShiftOSDesktop.skinimages(4) Then  Else titlebar.BackgroundImage = ShiftOSDesktop.skintitlebar(0)
    'End Sub

    Private Sub rollupbutton_Click(sender As Object, e As EventArgs) Handles rollupbutton.Click
        rollupanddown()
    End Sub

    Private Sub rollupbutton_MouseEnter(sender As Object, e As EventArgs) Handles rollupbutton.MouseEnter, rollupbutton.MouseUp
        rollupbutton.BackgroundImage = Skins.rollbtnhover
    End Sub

    Private Sub rollupbutton_MouseLeave(sender As Object, e As EventArgs) Handles rollupbutton.MouseLeave
        rollupbutton.BackgroundImage = Skins.rollbtn
    End Sub

    Private Sub rollupbutton_MouseDown(sender As Object, e As EventArgs) Handles rollupbutton.MouseDown
        rollupbutton.BackgroundImage = Skins.rollbtnclick
    End Sub

    Public Sub setuptitlebar()

        setupborders()

        If Me.Height = Me.titlebar.Height Then pgleft.Show() : pgbottom.Show() : pgright.Show() : Me.Height = rolldownsize : needtorollback = True
        pgleft.Width = Skins.borderwidth
        pgright.Width = Skins.borderwidth
        pgbottom.Height = Skins.borderwidth
        titlebar.Height = Skins.titlebarheight

        ' fixes growing issue
        If justopened = False Then
            Me.Size = New Size(Me.Width, Me.Height - (Skins.titlebarheight / 2))
        End If

        If justopened = True Then
            Me.Size = New Size(673, 507) 'put the default size of your window here
            Me.Size = New Size(Me.Width, Me.Height + Skins.titlebarheight - 30)
            Me.Size = New Size(Me.Width + Skins.borderwidth + Skins.borderwidth, Me.Height + Skins.borderwidth)
            oldbordersize = Skins.borderwidth
            oldtitlebarheight = Skins.titlebarheight
            justopened = False
        Else
            If Me.Visible = True Then
                'Me.Hide()
                Me.Size = New Size(Me.Width - (2 * oldbordersize) + (2 * Skins.borderwidth), (Me.Height - oldtitlebarheight - oldbordersize) + Skins.titlebarheight + Skins.borderwidth)
                'Me.Size = New Size(Me.Width - oldbordersize - oldbordersize, Me.Height - oldbordersize) 'Just put a little algebra in the first size setting and comment out the mess
                oldbordersize = Skins.borderwidth
                oldtitlebarheight = Skins.titlebarheight
                'Me.Size = New Size(Me.Width, Me.Height + Skins.titlebarheight - 30)
                'Me.Size = New Size(Me.Width + Skins. borderwidth + Skins. borderwidth, Me.Height + Skins. borderwidth)
                'rolldownsize = Me.Height
                If needtorollback = True Then Me.Height = titlebar.Height : pgleft.Hide() : pgbottom.Hide() : pgright.Hide()
                'Me.Show()
            End If
        End If

        If Skins.enablecorners = True Then
            pgtoplcorner.Show()
            pgtoprcorner.Show()
            pgtoprcorner.Width = Skins.titlebarcornerwidth
            pgtoplcorner.Width = Skins.titlebarcornerwidth
        Else
            pgtoplcorner.Hide()
            pgtoprcorner.Hide()
        End If

        If ShiftOSDesktop.boughttitlebar = False Then
            titlebar.Hide()
            Me.Size = New Size(Me.Width, Me.Size.Height - titlebar.Height)
        End If

        If ShiftOSDesktop.boughttitletext = False Then
            lbtitletext.Hide()
        Else
            lbtitletext.Font = New Font(Skins.titletextfontfamily, Skins.titletextfontsize, Skins.titletextfontstyle, GraphicsUnit.Point)
            lbtitletext.Text = ShiftOSDesktop.snakeyname 'Remember to change to name of program!!!!
            lbtitletext.Show()
        End If

        If ShiftOSDesktop.boughtclosebutton = False Then
            closebutton.Hide()
        Else
            closebutton.BackColor = Skins.closebtncolour
            closebutton.Size = Skins.closebtnsize
            closebutton.Show()
        End If

        If ShiftOSDesktop.boughtrollupbutton = False Then
            rollupbutton.Hide()
        Else
            rollupbutton.BackColor = Skins.rollbtncolour
            rollupbutton.Size = Skins.rollbtnsize
            rollupbutton.Show()
        End If

        If ShiftOSDesktop.boughtminimizebutton = False Then
            minimizebutton.Hide()
        Else
            minimizebutton.BackColor = Skins.minbtncolour
            minimizebutton.Size = Skins.minbtnsize
            minimizebutton.Show()
        End If

        If ShiftOSDesktop.boughtwindowborders = True Then
            closebutton.Location = New Point(titlebar.Size.Width - Skins.closebtnfromside - closebutton.Size.Width, Skins.closebtnfromtop)
            rollupbutton.Location = New Point(titlebar.Size.Width - Skins.rollbtnfromside - rollupbutton.Size.Width, Skins.rollbtnfromtop)
            minimizebutton.Location = New Point(titlebar.Size.Width - Skins.minbtnfromside - minimizebutton.Size.Width, Skins.minbtnfromtop)
            Select Case Skins.titletextpos
                Case "Left"
                    lbtitletext.Location = New Point(Skins.titletextfromside, Skins.titletextfromtop)
                Case "Centre"
                    lbtitletext.Location = New Point((titlebar.Width / 2) - lbtitletext.Width / 2, Skins.titletextfromtop)
            End Select
            lbtitletext.ForeColor = Skins.titletextcolour
        Else
            closebutton.Location = New Point(titlebar.Size.Width - Skins.closebtnfromside - pgtoplcorner.Width - pgtoprcorner.Width - closebutton.Size.Width, Skins.closebtnfromtop)
            rollupbutton.Location = New Point(titlebar.Size.Width - Skins.rollbtnfromside - pgtoplcorner.Width - pgtoprcorner.Width - rollupbutton.Size.Width, Skins.rollbtnfromtop)
            minimizebutton.Location = New Point(titlebar.Size.Width - Skins.minbtnfromside - pgtoplcorner.Width - pgtoprcorner.Width - minimizebutton.Size.Width, Skins.minbtnfromtop)
            Select Case Skins.titletextpos
                Case "Left"
                    lbtitletext.Location = New Point(Skins.titletextfromside + pgtoplcorner.Width, Skins.titletextfromtop)
                Case "Centre"
                    lbtitletext.Location = New Point((titlebar.Width / 2) - lbtitletext.Width / 2, Skins.titletextfromtop)
            End Select
            lbtitletext.ForeColor = Skins.titletextcolour
        End If

        'Change when Icon skinning complete
        If ShiftOSDesktop.boughtknowledgeinputicon = True Then ' Change to program's icon
            pnlicon.Visible = True
            pnlicon.Location = New Point(Skins.titleiconfromside, Skins.titleiconfromtop)
            pnlicon.Size = New Size(ShiftOSDesktop.titlebariconsize, ShiftOSDesktop.titlebariconsize)
            pnlicon.Image = ShiftOSDesktop.snakeyicontitlebar  'Replace with the correct icon for the program.
        End If

    End Sub

    Public Sub rollupanddown()
        If Me.Height = Me.titlebar.Height Then
            pgleft.Show()
            pgbottom.Show()
            pgright.Show()
            Me.Height = rolldownsize
            Me.MinimumSize = New Size(minimumsizewidth, minimumsizeheight)
        Else
            Me.MinimumSize = New Size(0, 0)
            pgleft.Hide()
            pgbottom.Hide()
            pgright.Hide()
            rolldownsize = Me.Height
            Me.Height = Me.titlebar.Height
        End If
    End Sub

    Public Sub resettitlebar()
        If ShiftOSDesktop.boughtwindowborders = True Then
            closebutton.Location = New Point(titlebar.Size.Width - Skins.closebtnfromside - closebutton.Size.Width, Skins.closebtnfromtop)
            rollupbutton.Location = New Point(titlebar.Size.Width - Skins.rollbtnfromside - rollupbutton.Size.Width, Skins.rollbtnfromtop)
            minimizebutton.Location = New Point(titlebar.Size.Width - Skins.minbtnfromside - minimizebutton.Size.Width, Skins.minbtnfromtop)
            Select Case Skins.titletextpos
                Case "Left"
                    lbtitletext.Location = New Point(Skins.titletextfromside, Skins.titletextfromtop)
                Case "Centre"
                    lbtitletext.Location = New Point((titlebar.Width / 2) - lbtitletext.Width / 2, Skins.titletextfromtop)
            End Select
            lbtitletext.ForeColor = Skins.titletextcolour
        Else
            closebutton.Location = New Point(titlebar.Size.Width - Skins.closebtnfromside - pgtoplcorner.Width - pgtoprcorner.Width - closebutton.Size.Width, Skins.closebtnfromtop)
            rollupbutton.Location = New Point(titlebar.Size.Width - Skins.rollbtnfromside - pgtoplcorner.Width - pgtoprcorner.Width - rollupbutton.Size.Width, Skins.rollbtnfromtop)
            minimizebutton.Location = New Point(titlebar.Size.Width - Skins.minbtnfromside - pgtoplcorner.Width - pgtoprcorner.Width - minimizebutton.Size.Width, Skins.minbtnfromtop)
            Select Case Skins.titletextpos
                Case "Left"
                    lbtitletext.Location = New Point(Skins.titletextfromside + pgtoplcorner.Width, Skins.titletextfromtop)
                Case "Centre"
                    lbtitletext.Location = New Point((titlebar.Width / 2) - lbtitletext.Width / 2, Skins.titletextfromtop)
            End Select
            lbtitletext.ForeColor = Skins.titletextcolour
        End If
    End Sub

    Private Sub pullside_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles pullside.Tick
        Me.Width = Cursor.Position.X - Me.Location.X
        resettitlebar()
    End Sub

    Private Sub pullbottom_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles pullbottom.Tick
        Me.Height = Cursor.Position.Y - Me.Location.Y
        resettitlebar()
    End Sub

    Private Sub pullbs_Tick(ByVal sender As Object, ByVal e As System.EventArgs) Handles pullbs.Tick
        Me.Width = Cursor.Position.X - Me.Location.X
        Me.Height = Cursor.Position.Y - Me.Location.Y
        resettitlebar()
    End Sub

    'delete this for non-resizable windows
    Private Sub Rightpull_MouseDown(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles pgright.MouseDown
        If ShiftOSDesktop.boughtresizablewindows = True Then
            pullside.Start()
        End If
    End Sub

    Private Sub RightCursorOn_MouseDown(ByVal sender As Object, ByVal e As System.EventArgs) Handles pgright.MouseEnter
        If ShiftOSDesktop.boughtresizablewindows = True Then
            Cursor = Cursors.SizeWE
        End If
    End Sub

    Private Sub bottomCursorOn_MouseDown(ByVal sender As Object, ByVal e As System.EventArgs) Handles pgbottom.MouseEnter
        If ShiftOSDesktop.boughtresizablewindows = True Then
            Cursor = Cursors.SizeNS
        End If
    End Sub

    Private Sub CornerCursorOn_MouseDown(ByVal sender As Object, ByVal e As System.EventArgs) Handles pgbottomrcorner.MouseEnter
        If ShiftOSDesktop.boughtresizablewindows = True Then
            Cursor = Cursors.SizeNWSE
        End If
    End Sub

    Private Sub SizeCursoroff_MouseDown(ByVal sender As Object, ByVal e As System.EventArgs) Handles pgright.MouseLeave, pgbottom.MouseLeave, pgbottomrcorner.MouseLeave
        If ShiftOSDesktop.boughtresizablewindows = True Then
            Cursor = Cursors.Default
        End If
    End Sub

    Private Sub rightpull_MouseUp(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles pgright.MouseUp
        If ShiftOSDesktop.boughtresizablewindows = True Then
            pullside.Stop()
        End If
    End Sub

    Private Sub bottompull_MouseDown(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles pgbottom.MouseDown
        If ShiftOSDesktop.boughtresizablewindows = True Then
            pullbottom.Start()
        End If
    End Sub

    Private Sub buttompull_MouseUp(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles pgbottom.MouseUp
        If ShiftOSDesktop.boughtresizablewindows = True Then
            pullbottom.Stop()
        End If
    End Sub

    Private Sub bspull_MouseDown(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles pgbottomrcorner.MouseDown
        If ShiftOSDesktop.boughtresizablewindows = True Then
            pullbs.Start()
        End If
    End Sub

    Private Sub bspull_MouseUp(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles pgbottomrcorner.MouseUp
        If ShiftOSDesktop.boughtresizablewindows = True Then
            pullbs.Stop()
        End If
    End Sub

    Public Sub setskin()
        'disposals
        closebutton.BackgroundImage = Nothing
        titlebar.BackgroundImage = Nothing
        rollupbutton.BackgroundImage = Nothing
        pgtoplcorner.BackgroundImage = Nothing
        pgtoprcorner.BackgroundImage = Nothing
        minimizebutton.BackgroundImage = Nothing
        'apply new skin
        If Skins.closebtn Is Nothing Then closebutton.BackColor = Skins.closebtncolour Else closebutton.BackgroundImage = Skins.closebtn
        closebutton.BackgroundImageLayout = Skins.closebtnlayout
        If Skins.titlebar Is Nothing Then titlebar.BackColor = Skins.titlebarcolour Else titlebar.BackgroundImage = Skins.titlebar
        titlebar.BackgroundImageLayout = Skins.titlebarlayout
        If Skins.rollbtn Is Nothing Then rollupbutton.BackColor = Skins.rollbtncolour Else rollupbutton.BackgroundImage = Skins.rollbtn
        rollupbutton.BackgroundImageLayout = Skins.rollbtnlayout
        If Skins.leftcorner Is Nothing Then pgtoplcorner.BackColor = Skins.leftcornercolour Else pgtoplcorner.BackgroundImage = Skins.leftcorner
        pgtoplcorner.BackgroundImageLayout = Skins.leftcornerlayout
        If Skins.rightcorner Is Nothing Then pgtoprcorner.BackColor = Skins.rightcornercolour Else pgtoprcorner.BackgroundImage = Skins.rightcorner
        pgtoprcorner.BackgroundImageLayout = Skins.rightcornerlayout
        If Skins.minbtn Is Nothing Then minimizebutton.BackColor = Skins.minbtncolour Else minimizebutton.BackgroundImage = Skins.minbtn
        minimizebutton.BackgroundImageLayout = Skins.minbtnlayout
        If Skins.borderleft Is Nothing Then pgleft.BackColor = Skins.borderleftcolour Else pgleft.BackgroundImage = Skins.borderleft
        pgleft.BackgroundImageLayout = Skins.borderleftlayout
        If Skins.borderright Is Nothing Then pgright.BackColor = Skins.borderrightcolour Else pgright.BackgroundImage = Skins.borderright
        pgleft.BackgroundImageLayout = Skins.borderrightlayout
        If Skins.borderbottom Is Nothing Then pgbottom.BackColor = Skins.borderbottomcolour Else pgbottom.BackgroundImage = Skins.borderbottom
        pgbottom.BackgroundImageLayout = Skins.borderbottomlayout
        If Skins.bottomleftcorner Is Nothing Then pgbottomlcorner.BackColor = Skins.bottomleftcornercolour Else pgbottomlcorner.BackgroundImage = Skins.bottomleftcorner
        pgbottomlcorner.BackgroundImageLayout = Skins.bottomleftcornerlayout
        If Skins.bottomrightcorner Is Nothing Then pgbottomrcorner.BackColor = Skins.bottomrightcornercolour Else pgbottomrcorner.BackgroundImage = Skins.bottomrightcorner
        pgbottomrcorner.BackgroundImageLayout = Skins.bottomrightcornerlayout

        Me.TransparencyKey = ShiftOSDesktop.globaltransparencycolour
    End Sub

    Private Sub Clock_FormClosing(sender As Object, e As FormClosingEventArgs) Handles Me.FormClosing
        ShiftOSDesktop.programsopen = ShiftOSDesktop.programsopen - 1
        Me.Hide()
        ShiftOSDesktop.setuppanelbuttons()
    End Sub

    'end of general setup
#End Region

    Private Structure structSnake
        Dim rect As Rectangle
        Dim x As Integer
        Dim y As Integer

    End Structure

    Private Enum Direction
        Rightward
        Downward
        Leftward
        Upward
    End Enum

    Private Const INITIAL_SNAKE_RECT_COUNT As Integer = 5
    Private Const COLUMN_COUNT As Integer = 65
    Private Const ROW_COUNT As Integer = 47

    Private curRecCount As Integer
    Private rects(,) As Rectangle
    Private isSnakePart(,) As Boolean
    Private snake As Collection
    Private snakeBrush As Brush = New SolidBrush(Color.FromArgb(255, 255, 255))
    Private backBrush As Brush = New SolidBrush(Color.FromArgb(1, 1, 1))
    Private tokenBrush As Brush = New SolidBrush(Color.FromArgb(255, 255, 255))
    Private curDirection As Direction
    Private buffer As Bitmap
    Private columnCount As Integer
    Private rowCount As Integer
    Private snakePoints As Integer
    Private snakeSpeed As Double
    Private snakeLength As Integer
    Private token As Rectangle

    Private Function xyToRectIndex(ByVal X As Integer, ByVal Y As Integer) As Integer
        Return (Y * (columnCount)) + X
    End Function

    Private Sub rectIndexToXY(ByVal Index As Integer, ByRef X As Integer, ByRef Y As Integer)
        X = Index Mod (columnCount)
        Y = Index \ (columnCount)
    End Sub

    Private Sub initSnake()

        Dim x As Integer
        Dim y As Integer
        Dim i As Integer
        Dim index As Integer
        Dim sSnake As structSnake
        snake = New Collection

        x = ((columnCount) - 10) \ 2
        y = ((rowCount) - 6) \ 2

        Dim snakePosition As Point = New Point(x, y)
        index = xyToRectIndex(x, y)

        For i = 1 To INITIAL_SNAKE_RECT_COUNT
            rectIndexToXY(index + (i - 1), x, y)
            sSnake.rect = rects(x, y)
            sSnake.x = x
            sSnake.y = y
            snake.Add(sSnake)
        Next

        snakeLength = INITIAL_SNAKE_RECT_COUNT
        snakeSpeed = 1
        length.Text = "Length: " & CStr(snakeLength)
        speed.Text = "Speed: " & CStr(snakeSpeed)

    End Sub

    Private Sub selectRectangles()

        Dim g As Graphics = Graphics.FromImage(My.Resources.snakeyback)
        Dim i As Integer
        Dim sSnake As structSnake

        For i = 1 To INITIAL_SNAKE_RECT_COUNT
            sSnake = snake(i)
            g.FillRectangle(snakeBrush, sSnake.rect)
            isSnakePart(sSnake.x, sSnake.y) = True
        Next

        buffer = New Bitmap(My.Resources.snakeyback)

        g.Dispose()
        Refresh()

    End Sub

    Private Sub initRectangles()

        Dim i As Integer
        Dim j As Integer

        columnCount = COLUMN_COUNT
        rowCount = ROW_COUNT

        ReDim rects(columnCount, rowCount)
        ReDim isSnakePart(columnCount, rowCount)

        For j = 0 To rowCount
            For i = 0 To columnCount
                rects(i, j) = New Rectangle((i * 10) + 1, (j * 10) + 1, 9, 9)
                isSnakePart(i, j) = False
            Next
        Next


    End Sub

    Private Sub initialize()

        curRecCount = INITIAL_SNAKE_RECT_COUNT
        curDirection = Direction.Leftward
        snakePoints = 0
        initRectangles()
        initSnake()
        selectRectangles()
        setToken()
        setPoints()
        tmr.Interval = 50
        tmr.Enabled = True

    End Sub

    Private Sub setPoints()
        score.Text = "Total Points: " & CStr(snakePoints)
    End Sub

    Private Sub setToken()

        Randomize()
        Dim x As Integer
        Dim y As Integer
        Dim g As Graphics = Graphics.FromImage(buffer)

        x = CInt(Rnd() * columnCount)
        Do While x > columnCount Or isSnakePart(x, y) = True
            x = CInt(Rnd() * columnCount)
        Loop

        y = CInt(Rnd() * rowCount)
        Do While y > rowCount Or isSnakePart(x, y) = True
            y = CInt(Rnd() * rowCount)
        Loop

        token = rects(x, y)

        g.FillEllipse(tokenBrush, token)
        Refresh()
        g.Dispose()

    End Sub

    Private Sub main_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        initialize()
    End Sub

    Private Sub main_KeyDown(ByVal sender As System.Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles MyBase.KeyDown

        Select Case e.KeyCode
            Case Keys.Down
                If Not (curDirection = Direction.Downward Or curDirection = Direction.Upward) Then
                    curDirection = Direction.Downward
                End If
            Case Keys.Left
                If Not (curDirection = Direction.Leftward Or curDirection = Direction.Rightward) Then
                    curDirection = Direction.Leftward
                End If
            Case Keys.Right
                If Not (curDirection = Direction.Rightward Or curDirection = Direction.Leftward) Then
                    curDirection = Direction.Rightward
                End If
            Case Keys.Up
                If Not (curDirection = Direction.Upward Or curDirection = Direction.Downward) Then
                    curDirection = Direction.Upward
                End If
        End Select

    End Sub

    Private Sub moveSnake()

        Dim sSnake As structSnake
        Dim x As Integer
        Dim y As Integer
        Dim rect As Rectangle = New Rectangle()
        Dim g As Graphics = Graphics.FromImage(buffer)

        tmr.Enabled = False
        sSnake = snake(snake.Count)
        g.FillRectangle(backBrush, sSnake.rect)
        snake.Remove(snake.Count)
        isSnakePart(sSnake.x, sSnake.y) = False
        sSnake = snake.Item(1)

        x = sSnake.x
        y = sSnake.y

        Select Case curDirection
            Case Direction.Downward
                y = y + 1
                If y > rowCount Then y = 0
            Case Direction.Leftward
                x = x - 1
                If x < 0 Then x = columnCount
            Case Direction.Rightward
                x = x + 1
                If x > columnCount Then x = 0
            Case Direction.Upward
                y = y - 1
                If y < 0 Then y = rowCount
        End Select

        If isSnakePart(x, y) = True Then
            tmr.Enabled = False

            If MessageBox.Show("You lost! You got a total of " & snakePoints & " codepoints. ", "Snake", MessageBoxButtons.OK, MessageBoxIcon.Question, MessageBoxDefaultButton.Button1) = Windows.Forms.DialogResult.Yes Then
                initialize()
                Exit Sub
            Else
                End
            End If

        End If


        rect = rects(x, y)

        sSnake.x = x
        sSnake.y = y
        sSnake.rect = rect
        isSnakePart(x, y) = True

        g.FillRectangle(snakeBrush, sSnake.rect)
        Me.BackgroundImage = buffer
        snake.Add(sSnake, , 1)

        If rects(x, y).Equals(CObj(token)) Then

            snakePoints += 1
            setPoints()

            If snakePoints Mod 5 = 0 Then
                sSnake = snake.Item(snake.Count)
                Select Case curDirection
                    Case Direction.Downward
                        sSnake.y -= 1
                    Case (Direction.Leftward)
                        sSnake.x += 1
                    Case Direction.Rightward
                        sSnake.x -= 1
                    Case Direction.Upward
                        sSnake.y += 1
                End Select

                sSnake.rect = rects(sSnake.x, sSnake.y)
                g.FillRectangle(snakeBrush, sSnake.rect)
                Me.BackgroundImage = buffer
                snake.Add(sSnake, , , snake.Count)
                snakeLength = snake.Count

                tmr.Interval -= 1
                If tmr.Interval < 0 Then tmr.Interval = 1

                snakeSpeed = 1 + (50 - tmr.Interval)
                length.Text = "Length: " & CStr(snakeLength)
                speed.Text = "Speed: " & CStr(snakeSpeed)

            End If

            setToken()

        End If

        Refresh()

        tmr.Enabled = True

    End Sub

    Private Sub tmr_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs)
        moveSnake()
        Application.DoEvents()
    End Sub
End Class