EDOKA_Client/EDOKA/Utils/OwnerMenu.vb

Imports System.Drawing
Imports System.Windows.Forms

Public Class OwnerMenu
    'holds menu items
    Private _MenuItems As New ArrayList()
        'default font
        Private _Font As Font = SystemInformation.MenuFont
        'default text color
        Private _TextColor As Color = System.Drawing.SystemColors.MenuText
        'constants
        Private Const NORMALITEMHEIGHT As Integer = 20
        Private Const SEPITEMHEIGHT As Integer = 12
        Private Const EXTRAWIDTH As Integer = 30
        Private Const ICONSIZE16 As Integer = 16

        'structure to hold menu items
        Private Structure LocalMenuItem
            Dim MenuItemNumber As Integer
            Dim MenuItem As Windows.Forms.MenuItem
            Dim Icon As System.Drawing.Icon
            Dim IconRectangle As System.Drawing.Rectangle
            Dim TextLeft As Integer
            Dim TextTopPosition As Integer
            Dim Font As System.Drawing.Font
            Dim TextColor As System.Drawing.Color
            Dim Height As Integer
            Dim Width As Integer
            Dim IsSeperator As Boolean
        End Structure

        Public Sub New()
            '
        End Sub
        'various constructors for the class
        Public Sub New(ByVal Font As System.Drawing.Font)
            _Font = Font
            If _Font.Size > 12 Then
                _Font = New Font(_Font.Name, 12, _Font.Style)
            End If
        End Sub
        Public Sub New(ByVal TextColor As System.Drawing.Color)
            _TextColor = TextColor
        End Sub
        Public Sub New(ByVal Font As System.Drawing.Font, _
          ByVal TextColor As System.Drawing.Color)
            _TextColor = TextColor
            _Font = Font
            If _Font.Size > 12 Then
                _Font = New Font(_Font.Name, 12, _Font.Style)
            End If
        End Sub
        'various constructors for the add method
        Public Sub Add(ByVal MenuItem As Windows.Forms.MenuItem, _
          ByVal Icon As System.Drawing.Icon, _
          ByVal MenuItemNumber As Integer, _
          ByVal IsSeperator As Boolean)
            Me.Add(MenuItem, Icon, MenuItemNumber, IsSeperator, _Font, _TextColor)
        End Sub
        Public Sub Add(ByVal MenuItem As Windows.Forms.MenuItem, _
          ByVal Icon As System.Drawing.Icon, _
          ByVal MenuItemNumber As Integer, _
          ByVal IsSeperator As Boolean, _
          ByVal Font As System.Drawing.Font)
            Me.Add(MenuItem, Icon, MenuItemNumber, IsSeperator, Font, _TextColor)
    End Sub

    Public Sub Add(ByVal MenuItem As Windows.Forms.MenuItem, _
  ByVal Bitmap As System.Drawing.Bitmap, _
  ByVal MenuItemNumber As Integer, _
  ByVal IsSeperator As Boolean)
        Dim Icon As Icon
        Dim intIndexOfImageIWant As Int16 = 1
        Icon = System.Drawing.Icon.FromHandle(Bitmap.GetHicon)
        Me.Add(MenuItem, Icon, MenuItemNumber, IsSeperator, _Font, _TextColor)
    End Sub

    Public Sub Add(ByVal MenuItem As Windows.Forms.MenuItem, _
      ByVal Icon As System.Drawing.Icon, _
      ByVal MenuItemNumber As Integer, _
      ByVal IsSeperator As Boolean, _
      ByVal Font As System.Drawing.Font, _
      ByVal TextColor As System.Drawing.Color)
        'hold and save the last top and left position
        Static LastTopPosition As Integer
        Static LastLeftPosition As Integer
        Dim li As New LocalMenuItem()
        If MenuItemNumber = 0 Then
            LastLeftPosition = 2
            LastTopPosition = 0
        Else
            'calculate the new top position
            LastTopPosition = LastTopPosition + IIf(IsSeperator, _
          SEPITEMHEIGHT, NORMALITEMHEIGHT)
            LastLeftPosition = 2
        End If
        Const ICONWIDTH As Integer = ICONSIZE16
        Const ICONHEIGHT As Integer = ICONSIZE16
        Dim IconRect As Rectangle
        'calculate new drawing rectangle for icon
        If IsSeperator Then
            IconRect = New Rectangle(LastLeftPosition, LastTopPosition, _
          ICONWIDTH, ICONHEIGHT)
        Else
            IconRect = New Rectangle(LastLeftPosition, LastTopPosition + 2, _
          ICONWIDTH, ICONHEIGHT)
        End If
        'you don't need to set ownerdraw - the class does it for you
        MenuItem.OwnerDraw = True
        With li
            .MenuItemNumber = MenuItemNumber
            .Font = Font
            .MenuItem = MenuItem
            .Icon = Icon
            .TextLeft = LastLeftPosition + ICONWIDTH
            .TextTopPosition = LastTopPosition
            .IconRectangle = IconRect
            .TextColor = TextColor
            .IsSeperator = IsSeperator
        End With
        _MenuItems.Add(li)
        'set the handlers for the menuitems
        AddHandler MenuItem.DrawItem, AddressOf Me.DrawItemHandler
        AddHandler MenuItem.MeasureItem, AddressOf Me.MesaureItemHandler
    End Sub

    Private Sub DoDraw(ByVal LI As LocalMenuItem, _
      ByRef e As System.Windows.Forms.DrawItemEventArgs)
        e.DrawBackground()
        Const LastLeftPosition As Integer = 2
        Const ICONWIDTH As Integer = ICONSIZE16
        Dim ThisMenuItem As MenuItem = LI.MenuItem
        Dim MenuItemGraphics As Graphics = e.Graphics
        Dim bBypassString As Boolean
        'set size and textpoint for our text
        Dim SizeF As SizeF = e.Graphics.MeasureString(LI.MenuItem.Text, _Font)
        Dim TextPoint As PointF = New PointF(LI.TextLeft, _
        LI.TextTopPosition + ((NORMALITEMHEIGHT - SizeF.Height) / 2))
        Dim RectHeight As Integer = SizeF.Height
        If Not LI.Icon Is Nothing Then
            'draw the icon
            MenuItemGraphics.DrawIcon(New Icon(LI.Icon, _
          ICONSIZE16, ICONSIZE16), LI.IconRectangle)
        ElseIf LI.IsSeperator Then
            'draw the separator
            MenuItemGraphics.DrawLine(New Pen(LI.TextColor, 1), _
          TextPoint.X, TextPoint.Y + 11, _
          TextPoint.X + LI.Width + EXTRAWIDTH, TextPoint.Y + 11)
            bBypassString = True
        End If
        If Not bBypassString Then
            'bypass string if separator
            'draw differently if enabled/dsabled
            If LI.MenuItem.Enabled Then
                MenuItemGraphics.DrawString(Replace(LI.MenuItem.Text, "&", ""), _
          LI.Font, New SolidBrush(LI.TextColor), TextPoint)
            Else
                MenuItemGraphics.DrawString(Replace(LI.MenuItem.Text, "&", ""), _
          LI.Font, New SolidBrush(Drawing.SystemColors.GrayText), TextPoint)
            End If
        End If
    End Sub
    Private Sub DoMeasure(ByVal LI As LocalMenuItem, _
      ByRef e As System.Windows.Forms.MeasureItemEventArgs)
        'calculate the size of the drawing area
        Dim ThisMenuItem_Strings As String() = LI.MenuItem.Text.Split(",")
        Dim TextSize As SizeF = e.Graphics.MeasureString( _
        ThisMenuItem_Strings(0).Replace("&", ""), LI.Font)
        e.ItemWidth = TextSize.Width + EXTRAWIDTH
        If LI.MenuItem.Text = "-" Then
            e.ItemHeight = SEPITEMHEIGHT
        Else
            e.ItemHeight = NORMALITEMHEIGHT
        End If
        LI.Height = e.ItemHeight
        LI.Width = e.ItemWidth
    End Sub
    Public Sub DrawItemHandler(ByVal sender As Object, _
      ByVal e As System.Windows.Forms.DrawItemEventArgs)
        'look through the items and find out which one we are drawing
        Dim li As LocalMenuItem
        For Each li In _MenuItems
            If li.MenuItem Is sender Then
                DoDraw(li, e)
                Exit For
            End If
        Next
    End Sub
    Public Sub MesaureItemHandler(ByVal sender As Object, _
      ByVal e As System.Windows.Forms.MeasureItemEventArgs)
        'look through the items and find out which one we are measuring
        Dim li As LocalMenuItem
        For Each li In _MenuItems
            If li.MenuItem Is sender Then
                DoMeasure(li, e)
                Exit For
            End If
        Next
    End Sub
End Class