Imports XCCLibrary

Public Class GUI
    Dim containerPanel As Panel
    Dim containerX, containerY, containerW, containerH, containerMidX, containerMidY As Integer
    Dim gratingMaxW, gratingMaxH As Decimal
    Dim drawW, drawH As Integer
    Dim drawAspect, gratingAspect As Decimal
    Dim scaleDiff As Decimal

    Public pCon1(3) As Decimal 'pCon(0) = pixel X, pCon(2) = SW X, etc.
    Public pCon2(3) As Decimal
    Public pCon3(3) As Decimal
    Public pCon4(3) As Decimal

    Dim points As New Dictionary(Of String, Decimal())
    Dim pointsOrder As New List(Of String)


    ' --- Start method when GUI loads ---
    Sub GUI_load() Handles MyBase.Load
        containerPanel = DrawingPanel
        AddHandler containerPanel.Paint, AddressOf DrawingPanel_Paint

        Get_DrawboxParameters()

        Set_ContainerPointsX()
        Set_ContainerPointsY()

        Create_StartPoints()
    End Sub

    ' --- Retrive parameters for the drawing box ---
    Private Sub Get_DrawboxParameters()
        containerX = containerPanel.Location.X   'Behövs ej nu
        containerY = containerPanel.Location.Y   'Behövs ej nu

        containerW = containerPanel.Size.Width
        containerH = containerPanel.Size.Height

        containerMidX = containerW / 2
        containerMidY = containerH / 2

        drawW = containerW - 60
        drawH = containerH - 60

        drawAspect = drawW / drawH
    End Sub

    ' --- Set containers points X-values ---
    Private Sub Set_ContainerPointsX()
        pCon1(0) = containerMidX - drawW / 2
        pCon2(0) = containerMidX + drawW / 2
        pCon3(0) = containerMidX + drawW / 2
        pCon4(0) = containerMidX - drawW / 2
    End Sub

    ' --- Set containers points Y-values ---
    Private Sub Set_ContainerPointsY()
        pCon1(1) = containerMidY - drawH / 2
        pCon2(1) = containerMidY - drawH / 2
        pCon3(1) = containerMidY + drawH / 2
        pCon4(1) = containerMidY + drawH / 2
    End Sub

    ' --- Sets the start points for the grating ---
    Private Sub Create_StartPoints()
        For i = 1 To 4
            points.Add("p" & i, CallByName(Me, "pCon" & i, vbGet))
            pointsOrder.Add("p" & i)
        Next
    End Sub

    ' --- Draw all the lines for the container and grating ---
    Private Sub DrawingPanel_Paint(sender As Object, e As System.Windows.Forms.PaintEventArgs)
        Dim penCon As Pen = New Pen(Color.DarkRed, 1)
        penCon.DashPattern = {4, 8}
        e.Graphics.DrawLine(penCon, CInt(pCon1(0)), CInt(pCon1(1)), CInt(pCon2(0)), CInt(pCon2(1)))
        e.Graphics.DrawLine(penCon, CInt(pCon2(0)), CInt(pCon2(1)), CInt(pCon3(0)), CInt(pCon3(1)))
        e.Graphics.DrawLine(penCon, CInt(pCon3(0)), CInt(pCon3(1)), CInt(pCon4(0)), CInt(pCon4(1)))
        e.Graphics.DrawLine(penCon, CInt(pCon4(0)), CInt(pCon4(1)), CInt(pCon1(0)), CInt(pCon1(1)))

        Dim pen As Pen = New Pen(Color.Black, 1)
        For i = 0 To pointsOrder.Count - 1
            Dim pTemp1() As Decimal
            Dim pTemp2() As Decimal

            pTemp1 = points(pointsOrder(i))
            Try
                pTemp2 = points(pointsOrder(i + 1))
            Catch ex As Exception
                pTemp2 = points(pointsOrder(0))
            End Try

            e.Graphics.DrawLine(pen, CInt(pTemp1(0)), CInt(pTemp1(1)), CInt(pTemp2(0)), CInt(pTemp2(1)))
        Next
    End Sub

    ' --- Generate a table containing all the points X- and Y-values ---
    Private Function Create_PointTable()
        Dim pointTable As New DataTable
        pointTable.Columns.Add("X", GetType(Decimal))
        pointTable.Columns.Add("Y", GetType(Decimal))

        For i = 0 To pointsOrder.Count - 1
            Dim pTemp() As Decimal
            pTemp = points(pointsOrder(i))

            pointTable.Rows.Add()
            pointTable.Rows(i)("X") = pTemp(2)
            pointTable.Rows(i)("Y") = pTemp(3)
        Next

        Return pointTable
    End Function



    ' ---------------------------------- GUI interactions ----------------------------------

    ' --- When update button is pressed ---
    Private Sub UpdateButton_Click(sender As Object, e As EventArgs) Handles UpdateButton.Click
        gratingMaxH = HeightBox.Text
        gratingMaxW = WidthBox.Text
        gratingAspect = gratingMaxW / gratingMaxH
        If gratingAspect > drawAspect Then
            'Change draw height
            scaleDiff = gratingMaxW / drawW

            pCon1(1) = containerMidY - gratingMaxH / (scaleDiff * 2)
            pCon2(1) = containerMidY - gratingMaxH / (scaleDiff * 2)
            pCon3(1) = containerMidY + gratingMaxH / (scaleDiff * 2)
            pCon4(1) = containerMidY + gratingMaxH / (scaleDiff * 2)

            Set_ContainerPointsX()
        Else
            'Change draw width
            scaleDiff = gratingMaxH / drawH

            pCon1(0) = containerMidX - gratingMaxW / (scaleDiff * 2)
            pCon2(0) = containerMidX + gratingMaxW / (scaleDiff * 2)
            pCon3(0) = containerMidX + gratingMaxW / (scaleDiff * 2)
            pCon4(0) = containerMidX - gratingMaxW / (scaleDiff * 2)

            Set_ContainerPointsY()
        End If

        'Redraw rectangle
        Me.Refresh()

        'SW X-values
        pCon1(2) = (-gratingMaxW / 2) / 1000
        pCon2(2) = (gratingMaxW / 2) / 1000
        pCon3(2) = (gratingMaxW / 2) / 1000
        pCon4(2) = (-gratingMaxW / 2) / 1000

        'SW Y-values
        pCon1(3) = (gratingMaxH / 2) / 1000
        pCon2(3) = (gratingMaxH / 2) / 1000
        pCon3(3) = (-gratingMaxH / 2) / 1000
        pCon4(3) = (-gratingMaxH / 2) / 1000
    End Sub

    ' --- When export to SW button is pressed ---
    Private Sub ExportSWButton_Click(sender As Object, e As EventArgs) Handles ExportSWButton.Click
        Dim pointTable As New DataTable
        pointTable = Create_PointTable()

        Program.Export_SW(pointTable)
        Program.Create_Drawing()
    End Sub

End Class