Thumbnail Generator

Public Class ThumbnailGenerate
    Dim CtrlWidth As Integer
    Dim CtrlHeight As Integer
    Dim PicWidth As Integer
    Dim PicHeight As Integer

    Dim XcLocation As Integer
    Dim YcLocation As Integer
    Private Sub ThumbnailGenerate_Resize(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Resize
        CtrlHeight = Me.Height
        CtrlWidth = Me.Width
    End Sub
    Private _Directory_Path As String
    Public Property Directorypath() As String
        Get
            Return _Directory_Path
        End Get
        Set(ByVal value As String)

            _Directory_Path = value

            XcLocation = -111
            YcLocation = 25
            PicWidth = 117
            PicHeight = 109
            CreateGallery()
        End Set
    End Property
    Dim i As Integer = 0
    Public Sub DrawPictureBox(ByVal _filename As String, ByVal _displayname As String)

        Dim checkBox = New CheckBox()

        XcLocation = XcLocation + PicWidth + 20


        If XcLocation + PicWidth >= CtrlWidth Then
            XcLocation = 25
            YcLocation = YcLocation + PicHeight + 20
        End If


        Dim original As Image = Image.FromFile(_filename)
        Dim resized As Image = ResizeImage(original, New Size(78, 78))
        Dim memStream As IO.MemoryStream = New IO.MemoryStream()
        resized.Save(memStream, Imaging.ImageFormat.Jpeg)

        Me.ToolTip1.SetToolTip(checkBox, _displayname)
        AddHandler checkBox.MouseEnter, AddressOf checkBox_MouseEnter
        AddHandler checkBox.MouseLeave, AddressOf checkBox_MouseLeave

        Me.Controls.Add(checkBox)
        checkBox.Size = New Size(117, 109)
        checkBox.Text = (_displayname)
        checkBox.Image = resized
        checkBox.BackColor = Color.Gray
        checkBox.ForeColor = Color.White
        checkBox.TextAlign = ContentAlignment.BottomCenter
        checkBox.Location = New System.Drawing.Point(XcLocation, YcLocation)
    End Sub

    Private Sub CreateGallery()
        i = 0
        RemoveControls()
        If Directorypath IsNot Nothing Then
            Dim di As New IO.DirectoryInfo(Directorypath)
            Dim diar1 As IO.FileInfo() = di.GetFiles("*.jpg").Concat(di.GetFiles("*.bmp")).Concat(di.GetFiles("*.png")).Concat(di.GetFiles("*.gif")).ToArray
            Dim dra As IO.FileInfo
            For Each dra In diar1
                DrawPictureBox(dra.FullName, dra.Name)
            Next
        End If
    End Sub

    Private Sub checkBox_MouseEnter(ByVal sender As System.Object, ByVal e As System.EventArgs)

    End Sub
    Private Sub checkBox_MouseLeave(ByVal sender As System.Object, ByVal e As System.EventArgs)

    End Sub
    Public Shared Function ResizeImage(ByVal image As Image, ByVal size As Size, Optional ByVal preserveAspectRatio As Boolean = True) As Image
        Dim newWidth As Integer
        Dim newHeight As Integer
        If preserveAspectRatio Then
            Dim originalWidth As Integer = image.Width
            Dim originalHeight As Integer = image.Height
            Dim percentWidth As Single = CSng(Size.Width) / CSng(originalWidth)
            Dim percentHeight As Single = CSng(Size.Height) / CSng(originalHeight)
            Dim percent As Single = If(percentHeight < percentWidth, percentHeight, percentWidth)
            newWidth = CInt(originalWidth * percent)
            newHeight = CInt(originalHeight * percent)
        Else
            newWidth = Size.Width
            newHeight = Size.Height
        End If
        Dim newImage As Image = New Bitmap(newWidth, newHeight)
        Using graphicsHandle As Graphics = Graphics.FromImage(newImage)

            graphicsHandle.DrawImage(image, 0, 0, newWidth, newHeight)
        End Using
        Return newImage
    End Function
    Private Sub RemoveControls()
Again:  For Each ctrl As Control In Me.Controls
            If TypeOf (ctrl) Is PictureBox Then
                Me.Controls.Remove(ctrl)
            End If
        Next
        If Me.Controls.Count > 0 Then
            GoTo Again
        End If
    End Sub
End Class