first full rendering sample of pop% cap with styling

Stars Assistant/Views/Helpers/PlanetStyleConverters.cs

@@ -0,0 +1,62 @@
+using Avalonia.Data.Converters;
+
+namespace StarsAssistant.Views.Helpers;
+
+public static class PlanetStyleConverters
+{
+    /// <summary>
+    /// Check, if the planet pop percentage is in the warning range
+    /// </summary>
+    public static FuncValueConverter<int?, bool> PopulationPercentWarning { get; }
+        = new((value) =>
+        {
+            return value switch
+            {
+                null => false,
+                > 0 and < 25 or > 33 and <= 50 => true,
+                _ => false
+            };
+        });
+
+    /// <summary>
+    /// Check, if the planet pop percentage is in a bad range (overpop)
+    /// </summary>
+    public static FuncValueConverter<int?, bool> PopulationPercentBad { get; }
+        = new((value) =>
+        {
+            return value switch
+            {
+                null => false,
+                > 100 => true,
+                _ => false
+            };
+        });
+     
+    /// <summary>
+    /// Check, if the planet pop percentage is in a good range (growth-wise)
+    /// </summary>
+    public static FuncValueConverter<int?, bool> PopulationPercentGood { get; }
+        = new((value) =>
+        {
+            return value switch
+            {
+                null => false,
+                >= 25 and <= 33 => true,
+                _ => false
+            };
+        });
+    
+    /// <summary>
+    /// Check, if the planet pop percentage is not relevant (100%)
+    /// </summary>
+    public static FuncValueConverter<int?, bool> PopulationPercentInactive { get; }
+        = new((value) =>
+        {
+            return value switch
+            {
+                null => false,
+                > 99 and <= 100 => true,
+                _ => false
+            };
+        });
+}