Parasitemia/ParasitemiaUI/GUI.fs

   1 module ParasitemiaUI.GUI
   2
   3 open System
   4 open System.IO
   5 open System.Linq
   6 open System.Windows
   7 open System.Windows.Media
   8 open System.Windows.Controls
   9 open Microsoft.Win32 // For the common dialogs.
  10
  11 open Logger
  12
  13 open ParasitemiaUIControls
  14 open ParasitemiaCore.Config
  15 open ParasitemiaCore.Utils
  16 open Types
  17
  18 let run (defaultConfig : Config) (fileToOpen : string option) =
  19     let app = new Application ()
  20     let win = MainWindow ()
  21
  22     let state = State.State defaultConfig
  23     let mutable currentScale = 1.
  24     let mutable displayHealthy = false
  25     let warningBelowNumberOfRBC = 1000
  26
  27     // Initializations.
  28     let canvasCurrentImageColor = win.canvasCurrentImage.Background
  29     win.menuHightlightRBC.IsChecked <- displayHealthy
  30
  31     // Utils.
  32     let extractRBCPreview (img : Emgu.CV.Image<Emgu.CV.Structure.Bgr, byte>) (rbc : RBC) : Emgu.CV.Image<Emgu.CV.Structure.Bgr, byte> =
  33         let rbcWidth = rbc.size.Width
  34         let rbcHeight = rbc.size.Height
  35         let x = rbc.center.X - rbcWidth / 2. |> roundInt
  36         let y = rbc.center.Y - rbcHeight / 2. |> roundInt
  37         let w = roundInt rbcWidth
  38         let h = roundInt rbcHeight
  39         img.GetSubRect (
  40             System.Drawing.Rectangle (
  41                 System.Drawing.Point ((if x < 0 then 0 else x), (if y < 0 then 0 else y)),
  42                 System.Drawing.Size ((if x + w >= img.Width then img.Width - x else w), (if y + h >= img.Height then img.Height - y else h))
  43             )
  44         )
  45
  46     let setRBCFrameStyle (srcImg : SourceImage) (rbc : RBC) (frame : RBCFrame) =
  47         frame.Opacity <- if displayHealthy || rbc.setManually || rbc.infected then 1. else 0.
  48         let color = if rbc.infected then srcImg.InfectedRBCColor else srcImg.HealthyRBCColor
  49         frame.manuallyAdded.Visibility <- if rbc.setManually then Visibility.Visible else Visibility.Hidden
  50         frame.manuallyAdded.Fill <- color
  51         frame.border.Stroke <- color
  52
  53     let frameStrokeThickness (averageRBCSize : float) =
  54         max 1. (averageRBCSize / 60.)
  55
  56     let frameFontSize (averageRBCSize : float) =
  57         max 1. (averageRBCSize / 6.)
  58
  59     let createRBCFrameFromExisting (srcImg : SourceImage) (rbc : RBC) (frame : RBCFrame) (frameThickness : float) (fontSize : float) (isTextBelow : bool) : RBCFrame =
  60         frame.Visibility <- Visibility.Visible
  61         frame.Width <- rbc.size.Width
  62         frame.Height <- rbc.size.Height
  63         frame.Tag <- rbc
  64         frame.IsTextBelow <- isTextBelow
  65         setRBCFrameStyle srcImg rbc frame
  66         frame.border.StrokeThickness <- frameThickness
  67         frame.txtRBCNumber.Text <- string rbc.num
  68         frame.txtRBCNumber.FontSize <- fontSize
  69         frame
  70
  71     let updateDocumentStatus () =
  72         win.txtDocumentStatus.Text <- if state.FilePath = "" then "<New document>" else state.FilePath
  73
  74     let statusMessageTimer = Threading.DispatcherTimer ()
  75     statusMessageTimer.Tick.AddHandler (fun obj args -> statusMessageTimer.Stop (); win.txtMessageStatus.Text <- "")
  76     statusMessageTimer.Interval <- TimeSpan (0, 0, 2)
  77
  78     // To show a use message while a short period of time.
  79     let displayStatusMessage (message : string) =
  80         win.txtMessageStatus.Text <- message
  81         statusMessageTimer.Stop ()
  82         statusMessageTimer.Start ()
  83
  84     let highlightRBC (rbc : RBC) (highlight : bool) =
  85         // let rbc = frame.Tag :?> RBC
  86         // Find the two frames in previews and current image.
  87
  88         for rbcFrame in (win.stackRBC.Children |> Seq.cast<RBCFrame>).Concat(win.canvasCurrentImage.Children |> Seq.cast<RBCFrame>) do
  89             if (rbcFrame.Tag :?> RBC) = rbc then
  90                 if highlight then
  91                     rbcFrame.border.StrokeThickness <- 3. * rbcFrame.border.StrokeThickness
  92                     if not rbc.infected && not rbc.setManually && not displayHealthy then rbcFrame.Opacity <- 1.
  93                 else
  94                     rbcFrame.border.StrokeThickness <- rbcFrame.border.StrokeThickness / 3.
  95                     if not rbc.infected && not rbc.setManually && not displayHealthy then rbcFrame.Opacity <- 0.
  96
  97     let zoomToRBC (rbc : RBC) =
  98         win.scrollViewCurrentImage.ScrollToHorizontalOffset (rbc.center.X * currentScale - win.scrollViewCurrentImage.ViewportWidth / 2. + win.borderCurrentImage.BorderThickness.Left)
  99         win.scrollViewCurrentImage.ScrollToVerticalOffset (rbc.center.Y * currentScale - win.scrollViewCurrentImage.ViewportHeight / 2. + win.borderCurrentImage.BorderThickness.Top)
 100
 101     let txtImageName_TextChanged =
 102         TextChangedEventHandler (fun obj args -> state.CurrentImage |> Option.iter (fun srcImg -> state.SetName srcImg win.txtImageName.Text))
 103
 104     let updateCurrentImageInformation () =
 105         win.txtImageName.TextChanged.RemoveHandler (txtImageName_TextChanged)
 106         win.txtImageInformation1.Inlines.Clear ()
 107         win.txtImageInformation2.Inlines.Clear ()
 108         win.txtImageName.Text <- ""
 109
 110         match state.CurrentImage with
 111         | Some srcImg ->
 112             win.gridImageInformation.Visibility <- Visibility.Visible
 113             win.txtImageName.Text <- srcImg.Name
 114             win.txtImageName.TextChanged.AddHandler txtImageName_TextChanged
 115
 116             // The left part.
 117             let parasitemiaStr = Utils.percentText srcImg.ImageParasitemia
 118             win.txtImageInformation1.Inlines.Add (Documents.Run ("Parasitemia: ", FontWeight = FontWeights.Bold))
 119             win.txtImageInformation1.Inlines.Add parasitemiaStr
 120             win.txtImageInformation1.Inlines.Add (Documents.LineBreak ())
 121
 122             win.txtImageInformation1.Inlines.Add (Documents.Run ("Last analysis: ", FontWeight = FontWeights.Bold))
 123             win.txtImageInformation1.Inlines.Add (Documents.Run (if srcImg.DateLastAnalysis.Ticks = 0L then "<Never>" else string (srcImg.DateLastAnalysis.ToLocalTime())))
 124
 125             // The right part part.
 126             win.txtImageInformation2.Inlines.Add (Documents.Run ("Added infected erythrocyte: ", FontWeight = FontWeights.Bold))
 127             win.txtImageInformation2.Inlines.Add (Documents.Run ((srcImg.ImageNbManuallyChangedRBCStr true) + " " + (srcImg.ImageManuallyChangedRBCStr true)))
 128             win.txtImageInformation2.Inlines.Add (Documents.LineBreak ())
 129             win.txtImageInformation2.Inlines.Add (Documents.Run ("Removed infected erythrocyte: ", FontWeight = FontWeights.Bold))
 130             win.txtImageInformation2.Inlines.Add (Documents.Run ((srcImg.ImageNbManuallyChangedRBCStr false) + " " + (srcImg.ImageManuallyChangedRBCStr false)))
 131
 132         | _ ->
 133             win.gridImageInformation.Visibility <- Visibility.Hidden
 134
 135     let updateGlobalParasitemia () =
 136         win.txtGlobalParasitemia.Inlines.Clear ()
 137         let total, infected = state.GlobalParasitemia
 138         win.txtGlobalParasitemia.Inlines.Add (Documents.Run (Utils.percentText (total, infected), FontWeight = FontWeights.Bold))
 139         if total > 0 && total < warningBelowNumberOfRBC then
 140             win.txtGlobalParasitemia.Inlines.Add (
 141                 Documents.Run (
 142                     sprintf " Warning: the number of erythrocytes should be above %d" warningBelowNumberOfRBC,
 143                     FontWeight = FontWeights.Bold,
 144                     Foreground = Brushes.Red
 145                 )
 146             )
 147
 148     let updateViewportPreview () =
 149         for preview in win.stackPreviews.Children |> Seq.cast<ImageSourcePreview> do
 150             let srcImg = preview.Tag :?> SourceImage
 151             if Some srcImg = state.CurrentImage then
 152                 preview.viewport.Visibility <- Visibility.Visible
 153
 154                 let canvasWidth = win.canvasCurrentImage.ActualWidth * currentScale
 155                 let canvasHeight = win.canvasCurrentImage.ActualHeight * currentScale
 156                 let previewWidth = (preview.ActualWidth - preview.BorderThickness.Left - preview.BorderThickness.Right)
 157                 let previewHeight = (preview.ActualHeight - preview.BorderThickness.Top - preview.BorderThickness.Bottom)
 158
 159                 let marginLeft = previewWidth * (win.scrollViewCurrentImage.HorizontalOffset - win.borderCurrentImage.BorderThickness.Left) / canvasWidth - 2.
 160                 let marginRight = previewWidth * (canvasWidth - (win.scrollViewCurrentImage.HorizontalOffset - win.borderCurrentImage.BorderThickness.Right) - win.scrollViewCurrentImage.ViewportWidth) / canvasWidth - 2.
 161                 let marginTop = previewHeight * (win.scrollViewCurrentImage.VerticalOffset - win.borderCurrentImage.BorderThickness.Top) / canvasHeight - 2.
 162                 let marginBottom = previewHeight * (canvasHeight - (win.scrollViewCurrentImage.VerticalOffset - win.borderCurrentImage.BorderThickness.Bottom) - win.scrollViewCurrentImage.ViewportHeight) / canvasHeight - 2.
 163
 164                 preview.viewport.Margin <-
 165                     Thickness (
 166                         marginLeft,
 167                         marginTop,
 168                         marginRight,
 169                         marginBottom
 170                     )
 171             else
 172                 preview.viewport.Visibility <- Visibility.Hidden
 173
 174     let rec setAsInfected (srcImg : SourceImage) (rbc : RBC) (infected : bool) =
 175         state.SetAsInfected rbc infected
 176         win.canvasCurrentImage.Children
 177         |> Seq.cast<RBCFrame>
 178         |> Seq.iter (
 179             fun frame ->
 180                 if (frame.Tag :?> RBC) = rbc then
 181                     setRBCFrameStyle srcImg rbc frame
 182         )
 183         updateRBCFramesPreview ()
 184         updateCurrentImageInformation ()
 185         updateGlobalParasitemia ()
 186
 187     and createRBCFrame (srcImg : SourceImage) (rbc : RBC) (frameThickness : float) (fontSize : float) (isTextBelow : bool) : RBCFrame =
 188         let frame = createRBCFrameFromExisting srcImg rbc (RBCFrame ()) frameThickness fontSize isTextBelow
 189         frame.SetValue (Panel.ZIndexProperty, Int32.MaxValue - rbc.num) // To be sure the
 190         frame.menuRBCSetAsHealthy.Click.AddHandler (fun obj args -> setAsInfected srcImg (frame.Tag :?> RBC) false)
 191         frame.menuRBCSetAsInfected.Click.AddHandler (fun obj args -> setAsInfected srcImg (frame.Tag :?> RBC) true)
 192         frame.ContextMenuOpening.AddHandler (
 193             fun obj args ->
 194                 if (frame.Tag :?> RBC).infected then
 195                     frame.menuRBCSetAsHealthy.Visibility <- Visibility.Visible
 196                     frame.menuRBCSetAsInfected.Visibility <- Visibility.Collapsed
 197                 else
 198                     frame.menuRBCSetAsHealthy.Visibility <- Visibility.Collapsed
 199                     frame.menuRBCSetAsInfected.Visibility <- Visibility.Visible
 200         )
 201         frame.ContextMenuClosing.AddHandler (fun obj args -> if not frame.IsMouseOver then highlightRBC (frame.Tag :?> RBC) false )
 202         frame.MouseEnter.AddHandler (fun obj args -> highlightRBC (frame.Tag :?> RBC) true)
 203         frame.MouseLeave.AddHandler (fun obj args -> if not frame.grid.ContextMenu.IsOpen then highlightRBC (frame.Tag :?> RBC) false)
 204         frame
 205
 206     and updateRBCFramesPreview () =
 207         match state.CurrentImage with
 208         | Some srcImg ->
 209             let mutable currentPreview = 0
 210             for rbc in srcImg.RBCs |> List.filter (fun rbc -> displayHealthy || rbc.infected) do
 211                 let previewInfected =
 212                     if currentPreview < win.stackRBC.Children.Count then
 213                         createRBCFrameFromExisting srcImg rbc (win.stackRBC.Children.[currentPreview] :?> RBCFrame) 1. 12. false
 214                     else
 215                         let f = createRBCFrame srcImg rbc 1. 12. false
 216                         f.MouseLeftButtonUp.AddHandler (fun obj args -> zoomToRBC (f.Tag :?> RBC))
 217                         win.stackRBC.Children.Add f |> ignore
 218                         f
 219
 220                 currentPreview <- currentPreview + 1
 221
 222                 previewInfected.Height <- win.stackRBC.ActualHeight
 223                 previewInfected.Width <- win.stackRBC.ActualHeight * rbc.size.Width / rbc.size.Height
 224                 previewInfected.border.Fill <- ImageBrush (BitmapSourceConvert.ToBitmapSource (extractRBCPreview srcImg.Img rbc))
 225
 226             win.stackRBC.Children.RemoveRange (currentPreview, win.stackRBC.Children.Count - currentPreview)
 227         | _ -> ()
 228
 229         updateViewportPreview ()
 230
 231     let updateRBCFramesCurrent () =
 232         match state.CurrentImage with
 233         | Some srcImg ->
 234             let mutable currentCanvas = 0
 235             let strokeThickness = frameStrokeThickness srcImg.AverageRBCSize
 236             let fontSize = frameFontSize srcImg.AverageRBCSize
 237             for rbc in srcImg.RBCs do
 238                 let frame =
 239                     if currentCanvas < win.canvasCurrentImage.Children.Count then
 240                         createRBCFrameFromExisting srcImg rbc (win.canvasCurrentImage.Children.[currentCanvas] :?> RBCFrame) strokeThickness fontSize true
 241                     else
 242                         let f = createRBCFrame srcImg rbc strokeThickness fontSize true
 243                         win.canvasCurrentImage.Children.Add f |> ignore
 244                         f
 245
 246                 currentCanvas <- currentCanvas + 1
 247
 248                 Canvas.SetLeft (frame, rbc.center.X - rbc.size.Width / 2.)
 249                 Canvas.SetTop (frame, rbc.center.Y - rbc.size.Height / 2.)
 250
 251             for i in currentCanvas .. win.canvasCurrentImage.Children.Count - 1 do
 252                 win.canvasCurrentImage.Children.[i].Visibility <- Visibility.Hidden
 253         | _ -> ()
 254
 255     let askDocumentPathToSave () : string option =
 256         let dialog = SaveFileDialog (AddExtension = true, DefaultExt = PiaZ.extension, Filter = PiaZ.filter)
 257
 258         if state.FilePath <> "" then
 259             dialog.FileName <- FileInfo(state.FilePath).Name
 260         elif state.PatientID <> "" then
 261             dialog.FileName <- state.PatientID + PiaZ.extension
 262
 263         let res = dialog.ShowDialog ()
 264         if res.HasValue && res.Value then
 265             Some dialog.FileName
 266         else
 267             None
 268
 269     let saveCurrentDocument () =
 270         try
 271             if state.FilePath = "" then
 272                 match askDocumentPathToSave () with
 273                 | Some filepath ->
 274                     state.FilePath <- filepath
 275                     state.Save ()
 276                 | _ -> ()
 277             else
 278                 state.Save ()
 279             updateDocumentStatus ()
 280             displayStatusMessage "Document saved"
 281         with
 282         | :? IOException as ex ->
 283             Log.Error "%O" ex
 284             MessageBox.Show (sprintf "The document cannot be save in \"%s\"" state.FilePath, "Error saving the document", MessageBoxButton.OK, MessageBoxImage.Error) |> ignore
 285
 286     let saveCurrentDocumentAsNewFile () =
 287         match askDocumentPathToSave () with
 288         | Some filepath ->
 289             state.FilePath <- filepath
 290             saveCurrentDocument ()
 291         | _ -> ()
 292
 293     // Ask the use to save the current document if neccessary.
 294     let askSaveCurrent () =
 295         if state.AlteredSinceLastSave then
 296             match MessageBox.Show ("Would you like to save the current document?", "Saving the current document", MessageBoxButton.YesNo, MessageBoxImage.Question) with
 297             | MessageBoxResult.Yes -> saveCurrentDocument ()
 298             | _ -> ()
 299
 300     let updateCurrentImage () =
 301         match state.CurrentImage with
 302         | Some srcImg ->
 303             win.imgLogos.Visibility <- Visibility.Collapsed
 304
 305             // Highlight the preview.
 306             win.stackPreviews.Children
 307             |> Seq.cast<ImageSourcePreview>
 308             |> Seq.iter (fun preview -> preview.border.BorderThickness <- Thickness (if preview.Tag = (srcImg :> Object) then 3. else 0.))
 309
 310             win.canvasCurrentImage.Height <- float srcImg.Img.Height
 311             win.canvasCurrentImage.Width <- float srcImg.Img.Width
 312             win.canvasCurrentImage.Background <- ImageBrush (BitmapSourceConvert.ToBitmapSource (srcImg.Img))
 313
 314             updateRBCFramesCurrent ()
 315             updateRBCFramesPreview ()
 316
 317         | None ->
 318             win.imgLogos.Visibility <- Visibility.Visible
 319
 320             win.stackRBC.Children.Clear ()
 321             win.canvasCurrentImage.Children.Clear ()
 322             win.canvasCurrentImage.Background <- canvasCurrentImageColor
 323
 324         updateCurrentImageInformation ()
 325
 326     let setCurrentImage (srcImg : SourceImage) =
 327         if state.CurrentImage.IsNone || state.CurrentImage.Value <> srcImg then
 328             state.CurrentImage <- Some srcImg
 329             updateCurrentImage ()
 330
 331     let addPreview (srcImg : SourceImage) =
 332         let imgCtrl = ImageSourcePreview (Margin = Thickness 3.)
 333
 334         imgCtrl.menuRemoveImage.Click.AddHandler (
 335             fun obj args ->
 336                 win.stackPreviews.Children.Remove (imgCtrl)
 337                 let srcImg = imgCtrl.Tag :?> SourceImage
 338                 let currentRemoved = Some srcImg = state.CurrentImage
 339                 state.RemoveSourceImage srcImg
 340                 if currentRemoved then
 341                     updateCurrentImage ()
 342
 343                 updateGlobalParasitemia ()
 344
 345                 // Update image numbers.
 346                 win.stackPreviews.Children |> Seq.cast<ImageSourcePreview> |> Seq.iter (fun imgPreview -> imgPreview.txtImageNumber.Text <- (imgPreview.Tag :?> SourceImage).RomanNum)
 347         )
 348
 349         imgCtrl.Tag <- srcImg
 350         imgCtrl.txtImageNumber.Text <- string srcImg.RomanNum
 351         let width = 200
 352         let height = srcImg.Img.Height * width / srcImg.Img.Width
 353         imgCtrl.imagePreview.Source <- BitmapSourceConvert.ToBitmapSource (srcImg.Img.Resize (width, height, Emgu.CV.CvEnum.Inter.Cubic))
 354         win.stackPreviews.Children.Add imgCtrl |> ignore
 355
 356         // Zoom to a mouse position into the control 'imgCtrl'.
 357         let zoomTo (mousePos : Point) =
 358             let canvasW = win.canvasCurrentImage.ActualWidth * currentScale
 359             let canvasH = win.canvasCurrentImage.ActualHeight * currentScale
 360             let centerX = (mousePos.X - imgCtrl.BorderThickness.Left) / (imgCtrl.ActualWidth - imgCtrl.BorderThickness.Left) * canvasW
 361             let centerY = (mousePos.Y - imgCtrl.BorderThickness.Top) / (imgCtrl.ActualHeight - imgCtrl.BorderThickness.Top) * canvasH
 362             win.scrollViewCurrentImage.ScrollToHorizontalOffset (centerX - win.scrollViewCurrentImage.ViewportWidth / 2. + win.borderCurrentImage.BorderThickness.Left)
 363             win.scrollViewCurrentImage.ScrollToVerticalOffset (centerY - win.scrollViewCurrentImage.ViewportHeight / 2. + win.borderCurrentImage.BorderThickness.Top)
 364
 365         imgCtrl.MouseLeftButtonDown.AddHandler (
 366             fun obj args ->
 367                 setCurrentImage (state.SourceImages |> Seq.find (fun srcImg -> (srcImg :> Object) = imgCtrl.Tag))
 368                 imgCtrl.UpdateLayout ()
 369                 zoomTo (args.GetPosition (imgCtrl))
 370                 imgCtrl.CaptureMouse () |> ignore
 371         )
 372
 373         imgCtrl.MouseMove.AddHandler (
 374             fun obj args ->
 375                 if imgCtrl.IsMouseCaptured then
 376                     zoomTo (args.GetPosition imgCtrl)
 377         )
 378
 379         imgCtrl.MouseLeftButtonUp.AddHandler (
 380             fun obj args ->
 381                 if imgCtrl.IsMouseCaptured then
 382                     imgCtrl.ReleaseMouseCapture ()
 383         )
 384
 385     let updatePreviews () =
 386         win.stackPreviews.Children.Clear ()
 387         for srcImg in state.SourceImages do
 388             addPreview srcImg
 389         updateCurrentImage ()
 390
 391     let updateGUI () =
 392         win.txtPatient.Text <- state.PatientID
 393         updatePreviews ()
 394         updateGlobalParasitemia ()
 395         updateDocumentStatus ()
 396
 397     let loadFile (filepath : string) =
 398         askSaveCurrent ()
 399         let previousFilePath = state.FilePath
 400         try
 401             state.FilePath <- filepath
 402             state.Load ()
 403             updateGUI ()
 404         with
 405         | :? IOException as ex ->
 406             Log.Error "%O" ex
 407             state.FilePath <- previousFilePath
 408             MessageBox.Show (sprintf "The document cannot be loaded from \"%s\"" filepath, "Error loading the document", MessageBoxButton.OK, MessageBoxImage.Error) |> ignore
 409
 410     let askLoadFile () =
 411         let dialog = OpenFileDialog (Filter = PiaZ.filter)
 412         let res = dialog.ShowDialog ()
 413         if res.HasValue && res.Value then
 414             loadFile dialog.FileName
 415
 416     let newFile () =
 417         askSaveCurrent ()
 418         state.Reset ()
 419         updateGUI ()
 420
 421     let exportResults () =
 422         let extension = ".txt"
 423         let dialog = SaveFileDialog (AddExtension = true, DefaultExt = extension)
 424
 425         if state.FilePath <> "" then
 426             dialog.FileName <- Path.GetFileNameWithoutExtension state.FilePath + extension
 427         elif state.PatientID <> "" then
 428             dialog.FileName <- state.PatientID + extension
 429
 430         let res = dialog.ShowDialog ()
 431         if res.HasValue && res.Value then
 432             try
 433                 Export.exportResults state dialog.FileName
 434             with
 435             | :? IOException as ex ->
 436                 Log.Error "%O" ex
 437                 MessageBox.Show (sprintf "The results cannot be exported in \"%s\"" state.FilePath, "Error exporting the files", MessageBoxButton.OK, MessageBoxImage.Error) |> ignore
 438
 439     let importImage () =
 440         let dialog = OpenFileDialog (Filter = "Image Files|*.png;*.jpg;*.tif;*.tiff", Multiselect = true)
 441         let res = dialog.ShowDialog ()
 442         if res.HasValue && res.Value then
 443             let noSourceImage = state.SourceImages.Count () = 0
 444
 445             for filename in dialog.FileNames do
 446                 try
 447                     let srcImg = state.AddSourceImage filename defaultConfig
 448                     addPreview srcImg
 449                 with
 450                 | _ as ex ->
 451                     Log.Error "%O" ex
 452                     MessageBox.Show (sprintf "Unable to read the image from \"%s\"" filename, "Error adding an image", MessageBoxButton.OK, MessageBoxImage.Error) |> ignore
 453
 454             updateGlobalParasitemia ()
 455
 456             if noSourceImage then
 457                 updateCurrentImage ()
 458
 459     let showAnalysisWindow () =
 460         if Analysis.showWindow win state then
 461             updateGlobalParasitemia ()
 462             updateCurrentImage ()
 463
 464     let setHighlightRBC (highlight : bool) =
 465         displayHealthy <- highlight
 466         updateRBCFramesPreview ()
 467         updateRBCFramesCurrent ()
 468
 469     win.txtPatient.TextChanged.AddHandler (fun obj args -> state.PatientID <- win.txtPatient.Text)
 470
 471     win.menuExit.Click.AddHandler (fun obj args -> win.Close ())
 472     win.menuSave.Click.AddHandler (fun obj args -> saveCurrentDocument ())
 473     win.menuSaveAs.Click.AddHandler (fun obj args -> saveCurrentDocumentAsNewFile ())
 474     win.menuOpen.Click.AddHandler (fun obj args -> askLoadFile ())
 475     win.menuNew.Click.AddHandler (fun obj args -> newFile ())
 476     win.menuExportResults.Click.AddHandler (fun obj args -> exportResults ())
 477
 478     win.menuAddSourceImage.Click.AddHandler (fun obj args -> importImage ())
 479
 480     win.menuAnalysis.SubmenuOpened.AddHandler (fun obj args -> win.menuStartAnalysis.IsEnabled <- state.SourceImages.Count () > 0)
 481
 482     win.menuStartAnalysis.Click.AddHandler (fun obj args -> showAnalysisWindow ())
 483
 484     win.menuHightlightRBC.Click.AddHandler (fun obj args -> setHighlightRBC win.menuHightlightRBC.IsChecked)
 485
 486     win.menuAbout.Click.AddHandler (fun obj args -> About.showWindow win)
 487
 488     win.menuCommandLineArguments.Click.AddHandler (fun obj args -> CommandLineArguments.showWindow win)
 489
 490     win.Closing.AddHandler (fun obj args -> askSaveCurrent ())
 491
 492     // Zoom on the current image.
 493     let adjustCurrentImageBorders (deltaX : float) (deltaY : float) =
 494         win.borderCurrentImage.BorderThickness <-
 495             Thickness (
 496                 (win.scrollViewCurrentImage.ViewportWidth + deltaX) / 2.,
 497                 (win.scrollViewCurrentImage.ViewportHeight + deltaY) / 2.,
 498                 (win.scrollViewCurrentImage.ViewportWidth + deltaX) / 2.,
 499                 (win.scrollViewCurrentImage.ViewportHeight + deltaY) / 2.
 500             )
 501
 502     win.canvasCurrentImage.SizeChanged.AddHandler (
 503         fun obj args ->
 504             let deltaX = args.NewSize.Width - args.PreviousSize.Width
 505             let deltaY = args.NewSize.Height - args.PreviousSize.Height
 506             if deltaX > 0.5 || deltaY > 0.5 then
 507                 adjustCurrentImageBorders 0.0 0.0
 508                 // Center the view at the center of the image initialy.
 509                 win.scrollViewCurrentImage.UpdateLayout ()
 510                 win.scrollViewCurrentImage.ScrollToHorizontalOffset (win.borderCurrentImage.ActualWidth / 2. - win.scrollViewCurrentImage.ViewportWidth / 2.)
 511                 win.scrollViewCurrentImage.ScrollToVerticalOffset (win.borderCurrentImage.ActualHeight / 2. - win.scrollViewCurrentImage.ViewportHeight / 2.)
 512     )
 513
 514     win.scrollViewCurrentImage.SizeChanged.AddHandler (
 515         fun obj args ->
 516             let deltaX = args.NewSize.Width - args.PreviousSize.Width
 517             let deltaY = args.NewSize.Height - args.PreviousSize.Height
 518             adjustCurrentImageBorders deltaX deltaY
 519             win.scrollViewCurrentImage.ScrollToHorizontalOffset (win.scrollViewCurrentImage.HorizontalOffset + deltaX / 8.)
 520             win.scrollViewCurrentImage.ScrollToVerticalOffset (win.scrollViewCurrentImage.VerticalOffset + deltaY / 8.)
 521     )
 522
 523     let mutable maxScale = 4.
 524     let mutable minScale = 0.25
 525     let currentImageScaleTransform = ScaleTransform ()
 526     win.canvasCurrentImage.LayoutTransform <- currentImageScaleTransform
 527     win.borderCurrentImage.PreviewMouseWheel.AddHandler (
 528         fun _obj args ->
 529             let scaleFactor = if args.Delta > 0 then 2.0 else 0.5
 530             if scaleFactor > 1. && currentScale < maxScale || scaleFactor < 1. && currentScale > minScale then
 531                 let previousScale = currentScale
 532                 currentScale <-
 533                     let newScale = currentScale * scaleFactor
 534                     if newScale > maxScale then maxScale elif newScale < minScale then minScale else newScale
 535                 let realScaleFactor = currentScale / previousScale
 536
 537                 let centerX = win.scrollViewCurrentImage.HorizontalOffset + win.scrollViewCurrentImage.ViewportWidth / 2. - win.borderCurrentImage.BorderThickness.Left
 538                 let centerY = win.scrollViewCurrentImage.VerticalOffset + win.scrollViewCurrentImage.ViewportHeight / 2. - win.borderCurrentImage.BorderThickness.Top
 539
 540                 currentImageScaleTransform.ScaleX <- currentScale
 541                 currentImageScaleTransform.ScaleY <- currentScale
 542
 543                 win.scrollViewCurrentImage.ScrollToHorizontalOffset (centerX * realScaleFactor - win.scrollViewCurrentImage.ViewportWidth / 2. + win.borderCurrentImage.BorderThickness.Left)
 544                 win.scrollViewCurrentImage.ScrollToVerticalOffset (centerY * realScaleFactor - win.scrollViewCurrentImage.ViewportHeight / 2. + win.borderCurrentImage.BorderThickness.Top)
 545
 546             args.Handled <- true
 547     )
 548
 549     // Pan on the current image.
 550     let mutable scrollStartPosition = Point (0., 0.)
 551     let mutable scrollStartOffsetX = 0.
 552     let mutable scrollStartOffsetY = 0.
 553     win.borderCurrentImage.PreviewMouseLeftButtonDown.AddHandler (
 554         fun _obj args ->
 555             scrollStartPosition <- args.GetPosition win.scrollViewCurrentImage
 556             scrollStartOffsetX <- win.scrollViewCurrentImage.HorizontalOffset
 557             scrollStartOffsetY <- win.scrollViewCurrentImage.VerticalOffset
 558             win.borderCurrentImage.Cursor <- Input.Cursors.ScrollAll
 559             win.borderCurrentImage.CaptureMouse () |> ignore
 560             args.Handled <- true
 561     )
 562
 563     win.borderCurrentImage.PreviewMouseMove.AddHandler (
 564         fun _obj args ->
 565             if win.borderCurrentImage.IsMouseCaptured then
 566                 let position = args.GetPosition win.scrollViewCurrentImage
 567                 let deltaX = scrollStartPosition.X - position.X
 568                 let deltaY = scrollStartPosition.Y - position.Y
 569                 win.scrollViewCurrentImage.ScrollToHorizontalOffset (deltaX + scrollStartOffsetX)
 570                 win.scrollViewCurrentImage.ScrollToVerticalOffset (deltaY + scrollStartOffsetY)
 571
 572                 args.Handled <- true
 573     )
 574
 575     win.borderCurrentImage.PreviewMouseLeftButtonUp.AddHandler (
 576         fun _obj args ->
 577             if win.borderCurrentImage.IsMouseCaptured then
 578                 win.borderCurrentImage.Cursor <- Input.Cursors.Arrow
 579                 win.borderCurrentImage.ReleaseMouseCapture ()
 580                 args.Handled <- true
 581     )
 582
 583     // Shortcuts.
 584     // Save.
 585     win.InputBindings.Add (
 586         Input.KeyBinding (
 587             ViewModule.FunCommand ((fun obj -> saveCurrentDocument ()), (fun obj -> true)),
 588             Input.KeyGesture (Input.Key.S, Input.ModifierKeys.Control)
 589         )
 590     ) |> ignore
 591
 592     // Save as.
 593     win.InputBindings.Add (
 594         Input.KeyBinding (
 595             ViewModule.FunCommand ((fun obj -> saveCurrentDocumentAsNewFile ()), (fun obj -> true)),
 596             Input.KeyGesture (Input.Key.S, Input.ModifierKeys.Control ||| Input.ModifierKeys.Shift)
 597         )
 598     ) |> ignore
 599
 600     // Open.
 601     win.InputBindings.Add (
 602         Input.KeyBinding (
 603             ViewModule.FunCommand ((fun obj -> askLoadFile ()), (fun obj -> true)),
 604             Input.KeyGesture (Input.Key.O, Input.ModifierKeys.Control)
 605         )
 606     ) |> ignore
 607
 608     // New file.
 609     win.InputBindings.Add (
 610         Input.KeyBinding (
 611             ViewModule.FunCommand ((fun obj -> newFile ()), (fun obj -> true)),
 612             Input.KeyGesture (Input.Key.N, Input.ModifierKeys.Control)
 613         )
 614     ) |> ignore
 615
 616     // Export results.
 617     win.InputBindings.Add (
 618         Input.KeyBinding (
 619             ViewModule.FunCommand ((fun obj -> exportResults ()), (fun obj -> true)),
 620             Input.KeyGesture (Input.Key.E, Input.ModifierKeys.Control)
 621         )
 622     ) |> ignore
 623
 624     // Import an image.
 625     win.InputBindings.Add (
 626         Input.KeyBinding (
 627             ViewModule.FunCommand ((fun obj -> importImage ()), (fun obj -> true)),
 628             Input.KeyGesture (Input.Key.A, Input.ModifierKeys.Control)
 629         )
 630     ) |> ignore
 631
 632     // Show analysis dialog.
 633     win.InputBindings.Add (
 634         Input.KeyBinding (
 635             ViewModule.FunCommand ((fun obj -> showAnalysisWindow ()), (fun obj -> state.SourceImages.Count () > 0)),
 636             Input.KeyGesture (Input.Key.Y, Input.ModifierKeys.Control)
 637         )
 638     ) |> ignore
 639
 640     // Toggle RBC highlight.
 641     win.InputBindings.Add (
 642         Input.KeyBinding (
 643             ViewModule.FunCommand (
 644                 (
 645                     fun obj ->
 646                         win.menuHightlightRBC.IsChecked <- not win.menuHightlightRBC.IsChecked
 647                         setHighlightRBC win.menuHightlightRBC.IsChecked
 648                 ),
 649                 (fun obj -> true)
 650             ),
 651             Input.KeyGesture (Input.Key.H, Input.ModifierKeys.Control)
 652         )
 653     ) |> ignore
 654
 655     // Viewport preview.
 656     win.scrollViewCurrentImage.ScrollChanged.AddHandler (fun obj args -> updateViewportPreview ())
 657
 658     updateDocumentStatus ()
 659     win.gridImageInformation.Visibility <- Visibility.Hidden
 660
 661     win.Show ()
 662
 663     match fileToOpen with
 664     | Some filepath -> loadFile filepath
 665     | None -> ()
 666
 667     app.Run ()