Parasitemia/ParasitemiaUI/DPICalculator.fs

   1 module ParasitemiaUI.PPICalculator
   2
   3 open System
   4 open System.Windows
   5 open System.Windows.Media
   6 open System.Windows.Markup
   7 open System.Windows.Shapes
   8 open System.Windows.Controls
   9 open System.Diagnostics
  10
  11 open ParasitemiaCore.Types
  12 open ParasitemiaCore.UnitsOfMeasure
  13
  14 open Types
  15
  16 let showWindow (parent : Window) : int option =
  17     let win = Views.PPICalculatorWindow ()
  18     win.Owner <- parent
  19     win.Left <- parent.Left + parent.ActualWidth / 2. - win.Width / 2.
  20     win.Top <- parent.Top + parent.ActualHeight / 2. - win.Height / 2.
  21
  22     for size in Utils.sensorSizes do
  23         win.cmbSensorSize.Items.Add (size) |> ignore
  24     win.cmbSensorSize.SelectedIndex <- 0
  25
  26     let resolution (w_p : float<px>) (w_mm : float<mm>) (zoom : float) : float<ppi> =
  27         w_p * zoom / mmToInch w_mm
  28
  29     let updateCurrentResolution () =
  30         let { w = w; h = h } = win.cmbSensorSize.SelectedValue :?> SensorSize
  31         let ratio = h / w
  32
  33         let parseDouble txt errorMess = match Double.TryParse (txt) with true, value -> Success value | _ -> Fail errorMess
  34
  35         match
  36             (result {
  37                 let! sensorResolution = parseDouble win.txtSensorResolution.Text "The sensor resolution is not valid"
  38                 let! zoom = parseDouble win.txtZoom.Text "The zoom is not valid"
  39                 let wPixel = 1.<px> * sqrt (sensorResolution * 1e6 / ratio)
  40                 return! Success (float <| resolution wPixel w zoom)
  41             }) with
  42         | Success res -> win.txtImageResolution.Text <- int (res / 1000.) * 1000 |> string
  43         | Fail mess -> win.txtImageResolution.Text <- mess
  44
  45     win.butCancel.Click.AddHandler (fun obj args -> win.DialogResult <- Nullable<bool> (false); win.Close ())
  46     win.butOK.Click.AddHandler (fun obj args -> win.DialogResult <- Nullable<bool> (true); win.Close ())
  47
  48     win.cmbSensorSize.SelectionChanged.AddHandler (fun obj arg -> updateCurrentResolution ())
  49     win.txtSensorResolution.TextChanged.AddHandler (fun obj arg -> updateCurrentResolution ())
  50     win.txtZoom.TextChanged.AddHandler (fun obj arg -> updateCurrentResolution ())
  51
  52     let result = win.ShowDialog ()
  53     if result.HasValue && result.Value then
  54         match Int32.TryParse win.txtImageResolution.Text with
  55         | true, res -> Some res
  56         | _ -> None
  57     else
  58         None
  59