From 5d1a08f1b121d660228b08d9f931edaed619fdb9 Mon Sep 17 00:00:00 2001
From: Greg Burri <greg.burri@gmail.com>
Date: Mon, 22 Mar 2021 14:18:42 +0100
Subject: [PATCH] Use an absolute value for thickness and font size

---
 Parasitemia/ParasitemiaUI/GUI.fs | 19 +++++++++----------
 1 file changed, 9 insertions(+), 10 deletions(-)

diff --git a/Parasitemia/ParasitemiaUI/GUI.fs b/Parasitemia/ParasitemiaUI/GUI.fs
index 74aba27..c85017f 100644
--- a/Parasitemia/ParasitemiaUI/GUI.fs
+++ b/Parasitemia/ParasitemiaUI/GUI.fs
@@ -50,11 +50,11 @@ let run (defaultConfig : Config) (fileToOpen : string option) =
         frame.manuallyAdded.Fill <- color
         frame.border.Stroke <- color
 
-    let frameStrokeThickness (averageRBCSize : float) =
-        max 1. (averageRBCSize / 60.)
+    let frameStrokeThickness () =
+        state.CurrentImage |> Option.map (fun img -> max 1. (img.AverageRBCSize / 100.)) |> Option.defaultValue 1.
 
-    let frameFontSize (averageRBCSize : float) =
-        max 1. (averageRBCSize / 6.)
+    let frameFontSize () =
+        state.CurrentImage |> Option.map (fun img -> max 1. (img.AverageRBCSize / 6.)) |> Option.defaultValue 1.
 
     let createRBCFrameFromExisting (srcImg : SourceImage) (rbc : RBC) (frame : RBCFrame) (frameThickness : float) (fontSize : float) (isTextBelow : bool) : RBCFrame =
         frame.Visibility <- Visibility.Visible
@@ -82,16 +82,15 @@ let run (defaultConfig : Config) (fileToOpen : string option) =
         statusMessageTimer.Start ()
 
     let highlightRBC (rbc : RBC) (highlight : bool) =
-        // let rbc = frame.Tag :?> RBC
-        // Find the two frames in previews and current image.
+        let strokeThickness = frameStrokeThickness ()
 
         for rbcFrame in (win.stackRBC.Children |> Seq.cast<RBCFrame>).Concat(win.canvasCurrentImage.Children |> Seq.cast<RBCFrame>) do
             if (rbcFrame.Tag :?> RBC) = rbc then
                 if highlight then
-                    rbcFrame.border.StrokeThickness <- 3. * rbcFrame.border.StrokeThickness
+                    rbcFrame.border.StrokeThickness <- 3. * strokeThickness
                     if not rbc.infected && not rbc.setManually && not displayHealthy then rbcFrame.Opacity <- 1.
                 else
-                    rbcFrame.border.StrokeThickness <- rbcFrame.border.StrokeThickness / 3.
+                    rbcFrame.border.StrokeThickness <- strokeThickness
                     if not rbc.infected && not rbc.setManually && not displayHealthy then rbcFrame.Opacity <- 0.
 
     let zoomToRBC (rbc : RBC) =
@@ -232,8 +231,8 @@ let run (defaultConfig : Config) (fileToOpen : string option) =
         match state.CurrentImage with
         | Some srcImg ->
             let mutable currentCanvas = 0
-            let strokeThickness = frameStrokeThickness srcImg.AverageRBCSize
-            let fontSize = frameFontSize srcImg.AverageRBCSize
+            let strokeThickness = frameStrokeThickness ()
+            let fontSize = frameFontSize ()
             for rbc in srcImg.RBCs do
                 let frame =
                     if currentCanvas < win.canvasCurrentImage.Children.Count then
-- 
2.43.0