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