Merge pull request #16 from iniceice88/fix/tracker

Fix: TrackerControl is invisible on Windows platform

Author: janusw

Source/OxyPlot.Maui.Skia/PlotViewBase.cs

@@ -256,7 +256,7 @@ public void ShowTracker(TrackerHitResult trackerHitResult)
 
             var tracker = (ContentView)trackerTemplate.CreateContent();
             this.overlays.Children.Add(tracker);
-            AbsoluteLayout.SetLayoutBounds(tracker, new Rect(0, 0, 0, 0));
+            AbsoluteLayout.SetLayoutBounds(tracker, new Rect(0, 0, 1, 1));
             this.currentTracker = tracker;
             this.currentTrackerTemplate = trackerTemplate;
         }

Source/OxyPlot.Maui.Skia/Tracker/TrackerControl.xaml

@@ -1,16 +1,21 @@
 <?xml version="1.0" encoding="utf-8" ?>
-<ContentView x:Class="OxyPlot.Maui.Skia.TrackerControl" xmlns="http://schemas.microsoft.com/dotnet/2021/maui" xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml">
+<ContentView x:Class="OxyPlot.Maui.Skia.TrackerControl" xmlns="http://schemas.microsoft.com/dotnet/2021/maui" xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml" xmlns:skia="using:OxyPlot.Maui.Skia">
     <ContentView.Resources>
-        <ControlTemplate x:Key="TrackerControlTemplate">
+        <ControlTemplate x:Key="TrackerControlTemplate" x:DataType="skia:TrackerControl">
             <AbsoluteLayout HorizontalOptions="Fill" VerticalOptions="Fill">
                 <Line
                     x:Name="PART_HorizontalLine"
+                    Background="{TemplateBinding LineStroke}"
+                    Fill="{TemplateBinding LineStroke}"
                     HeightRequest="1"
                     IsVisible="{TemplateBinding HorizontalLineVisibility}"
                     Stroke="{TemplateBinding LineStroke}"
+                    StrokeDashArray="{TemplateBinding LineDashArray}"
                     WidthRequest="999" />
                 <Line
                     x:Name="PART_VerticalLine"
+                    Background="{TemplateBinding LineStroke}"
+                    Fill="{TemplateBinding LineStroke}"
                     HeightRequest="999"
                     IsVisible="{TemplateBinding VerticalLineVisibility}"
                     Stroke="{TemplateBinding LineStroke}"

Source/OxyPlot.Maui.Skia/Tracker/TrackerControl.xaml.cs

@@ -449,46 +449,32 @@ private void UpdatePositionAndBorder()
 
         if (horizontalLine != null)
         {
-            horizontalLine.WidthRequest = canvasWidth;
-
             if (LineExtents.Width > 0)
             {
-                horizontalLine.X1 = LineExtents.Left;
-                horizontalLine.X2 = LineExtents.Right;
+                horizontalLine.WidthRequest = LineExtents.Width;
             }
             else
             {
-                horizontalLine.X1 = 0;
-                horizontalLine.X2 = canvasWidth;
+                horizontalLine.WidthRequest = canvasWidth;
             }
 
-            horizontalLine.Y1 = Position.Y;
-            horizontalLine.Y2 = Position.Y;
-
             horizontalLine.TranslationY = Position.Y;
-            horizontalLine.TranslationX = horizontalLine.X1;
+            horizontalLine.TranslationX = LineExtents.Left;
         }
 
         if (verticalLine != null)
         {
-            verticalLine.HeightRequest = canvasHeight;
-
             if (LineExtents.Height > 0)
             {
-                verticalLine.Y1 = LineExtents.Top;
-                verticalLine.Y2 = LineExtents.Bottom;
+                verticalLine.HeightRequest = LineExtents.Height;
             }
             else
             {
-                verticalLine.Y1 = 0;
-                verticalLine.Y2 = canvasHeight;
+                verticalLine.HeightRequest = canvasHeight;
             }
 
-            verticalLine.X1 = Position.X;
-            verticalLine.X2 = Position.X;
-
             verticalLine.TranslationX = Position.X;
-            verticalLine.TranslationY = verticalLine.Y1;
+            verticalLine.TranslationY = LineExtents.Top;
         }
 
         Opacity = 1;