[Dark Mode] Marker in ItemView are now easier to see

Markers like the resize column marker & the drag markers while reordering pages/books are now white when using Dark Mode.

- Added ResizeMarker/DragMarker to ThemePens
- Added ItemView.Marker to ThemeColors (same entry for both Pens)
- Added ItemViewMarker to ThemeColorTable/DarkThemeColorTable

Author: maforget

cYo.Common.Windows/Forms/ItemView.cs

@@ -3262,7 +3262,7 @@ protected virtual void DrawMarker(Graphics gr, Rectangle bounds)
 			using (Brush brush = new SolidBrush(color))
 			{
 				gr.FillRectangle(brush, bounds);
-				gr.DrawRectangle(Pens.Black, bounds);
+				gr.DrawRectangle(ThemePens.ItemView.DragMarker, bounds);
 			}
 		}
 
@@ -3485,11 +3485,7 @@ protected override void OnPaint(PaintEventArgs e)
 					{
 						Rectangle viewRectangle = ViewRectangle;
 						viewRectangle.X = GetColumnHeaderRectangle(resizeColumn).Right - base.ScrollPositionX;
-						using (Pen pen = new Pen(Color.Black))
-						{
-							pen.DashStyle = DashStyle.DashDot;
-							graphics.DrawLine(pen, viewRectangle.Location, new Point(viewRectangle.X, viewRectangle.Bottom));
-						}
+						graphics.DrawLine(ThemePens.ItemView.ResizeMarker, viewRectangle.Location, new Point(viewRectangle.X, viewRectangle.Bottom));
 					}
 					if (dragHeader != null)
 					{

cYo.Common.Windows/Forms/Theme/DarkMode/DarkThemeColorTable.cs

@@ -71,9 +71,10 @@ internal class DarkThemeColorTable : ThemeColorTable
     public override Color ItemViewDefaultBack => SystemColors.Window;
     public override Color ItemViewGroupText => Color.LightSkyBlue;
     public override Color ItemViewGroupSeparator => SystemColors.InactiveCaptionText; // Color.FromArgb(190, 190, 190);
+    public override Color ItemViewMarker => Color.White;
 
-    // CoverViewItem
-    public override Color DetailRowHighlight => Color.FromArgb(72, 72, 72); // This drawn on top of ItemViewMainBack blending at alpha 96 giving "#2F2F2F"
+	// CoverViewItem
+	public override Color DetailRowHighlight => Color.FromArgb(72, 72, 72); // This drawn on top of ItemViewMainBack blending at alpha 96 giving "#2F2F2F"
 
     // NiceTreeSkin
     public override Color NiceTreeSkinDragSeparator => SystemColors.InactiveCaptionText; // Color.FromArgb(190, 190, 190);

cYo.Common.Windows/Forms/Theme/Internal/ThemeColorTable.cs

@@ -74,9 +74,10 @@ internal class ThemeColorTable
     public virtual Color ItemViewDefaultBack => System.Drawing.SystemColors.Window;
     public virtual Color ItemViewGroupText => Color.DarkBlue;
     public virtual Color ItemViewGroupSeparator => System.Drawing.SystemColors.ControlDark;
+    public virtual Color ItemViewMarker => Color.Black;
 
-    // CoverViewItem
-    public virtual Color DetailRowHighlight => Color.LightGray;
+	// CoverViewItem
+	public virtual Color DetailRowHighlight => Color.LightGray;
 
     // ItemDrawInformation
     public virtual Color ItemDrawInfoText => Color.Black;
@@ -135,18 +136,18 @@ internal class ThemeColorTable
     public virtual Color StackBorder => Color.Black;
 
 
-    // ControlStyleColorTable
-    //public virtual Color ControlStyleColorTableBorder => Color.Black;
+	// ControlStyleColorTable
+	//public virtual Color ControlStyleColorTableBorder => Color.Black;
 
-    // MainForm
-    //public virtual Color MainFormToolStripBack => Color.Transparent;
+	// MainForm
+	//public virtual Color MainFormToolStripBack => Color.Transparent;
 
-    // MainView
-    //public virtual Color MainViewBack => Color.Transparent;
-    //public virtual Color MainViewToolStripBack => Color.Transparent;
+	// MainView
+	//public virtual Color MainViewBack => Color.Transparent;
+	//public virtual Color MainViewToolStripBack => Color.Transparent;
 
-    //public virtual Color MatcherGroupEditor => System.Drawing.SystemColors.Control;
+	//public virtual Color MatcherGroupEditor => System.Drawing.SystemColors.Control;
 
-    // SimpleScrollbarPanel
-    //public virtual Color ScrollbarPanelBorder => Color.LightGray;
+	// SimpleScrollbarPanel
+	//public virtual Color ScrollbarPanelBorder => Color.LightGray;
 }

cYo.Common.Windows/Forms/Theme/Resources/ThemeColors.cs

@@ -107,6 +107,7 @@ public static class ItemView
         public static Color MainBack => ColorTable.ItemViewMainBack;
         public static Color GroupText => ColorTable.ItemViewGroupText;
         public static Color GroupSeparator => ColorTable.ItemViewGroupSeparator;
+        public static Color Marker => ColorTable.ItemViewMarker;
 	}
 
     public static class NiceTreeSkin

cYo.Common.Windows/Forms/Theme/Resources/ThemePens.cs

@@ -1,5 +1,6 @@
 using System.Collections.Generic;
 using System.Drawing;
+using System.Drawing.Drawing2D;
 
 namespace cYo.Common.Windows.Forms.Theme.Resources;
 
@@ -36,10 +37,25 @@ public static class ThumbnailViewItem
         public static Pen Border => FromThemeColor(ThemeColors.ThumbnailViewItem.Border);
     }
 
-    /// <summary>
-    /// Returns a <see cref="Pen"/> with the specified <paramref name="color"/>.
-    /// </summary>
-    public static Pen FromThemeColor(Color color)
+	public static class ItemView
+	{
+		public static Pen ResizeMarker
+		{
+			get
+			{
+				Pen pen = FromThemeColor(ThemeColors.ItemView.Marker);
+				pen.DashStyle = DashStyle.DashDot;
+                return pen;
+			}
+		}
+
+        public static Pen DragMarker => FromThemeColor(ThemeColors.ItemView.Marker);
+	}
+
+	/// <summary>
+	/// Returns a <see cref="Pen"/> with the specified <paramref name="color"/>.
+	/// </summary>
+	public static Pen FromThemeColor(Color color)
     {
         if (!cache.TryGetValue(color, out var pen))
         {