From 29d355660e2492f0c61e0a83deef47358f29726e Mon Sep 17 00:00:00 2001
From: Miguel de Icaza <miguel@gnome.org>
Date: Thu, 25 Jan 2018 23:24:47 -0500
Subject: [PATCH] looks slightly better

---
 Terminal.Gui/Driver.cs           | 72 ++++++++++++++++++++++++++++++--
 Terminal.Gui/Views/ScrollView.cs | 46 ++++++++++++++------
 2 files changed, 102 insertions(+), 16 deletions(-)

diff --git a/Terminal.Gui/Driver.cs b/Terminal.Gui/Driver.cs
index fff442c1b..372683794 100644
--- a/Terminal.Gui/Driver.cs
+++ b/Terminal.Gui/Driver.cs
@@ -177,6 +177,46 @@ namespace Terminal.Gui {
 		/// </summary>
 		Diamond,
 
+		/// <summary>
+		/// Upper left corner
+		/// </summary>
+		ULCorner,
+
+		/// <summary>
+		/// Lower left corner
+		/// </summary>
+		LLCorner,
+
+		/// <summary>
+		/// Upper right corner
+		/// </summary>
+		URCorner,
+
+		/// <summary>
+		/// Lower right corner
+		/// </summary>
+		LRCorner,
+
+		/// <summary>
+		/// Left tee
+		/// </summary>
+		LeftTee,
+
+		/// <summary>
+		/// Right tee
+		/// </summary>
+		RightTee,
+
+		/// <summary>
+		/// Top tee 
+		/// </summary>
+		TopTee,
+
+		/// <summary>
+		/// The bottom tee.
+		/// </summary>
+		BottomTee,
+
 	}
 
 	/// <summary>
@@ -312,16 +352,40 @@ namespace Terminal.Gui {
 		{
 			switch (ch) {
 			case SpecialChar.HLine:
-				AddRune (Curses.ACS_HLINE);
+				AddRune(Curses.ACS_HLINE);
 				break;
 			case SpecialChar.VLine:
-				AddRune (Curses.ACS_VLINE);
+				AddRune(Curses.ACS_VLINE);
 				break;
 			case SpecialChar.Stipple:
-				AddRune (Curses.ACS_CKBOARD);
+				AddRune(Curses.ACS_CKBOARD);
 				break;
 			case SpecialChar.Diamond:
-				AddRune (Curses.ACS_DIAMOND);
+				AddRune(Curses.ACS_DIAMOND);
+				break;
+			case SpecialChar.ULCorner:
+				AddRune (Curses.ACS_ULCORNER);
+				break;
+			case SpecialChar.LLCorner:
+				AddRune (Curses.ACS_LLCORNER);
+				break;
+			case SpecialChar.URCorner:
+				AddRune (Curses.ACS_URCORNER);
+				break;
+			case SpecialChar.LRCorner:
+				AddRune (Curses.ACS_LRCORNER);
+				break;
+			case SpecialChar.LeftTee:
+				AddRune (Curses.ACS_LTEE);
+				break;
+			case SpecialChar.RightTee:
+				AddRune (Curses.ACS_RTEE);
+				break;
+			case SpecialChar.TopTee:
+				AddRune (Curses.ACS_TTEE);
+				break;
+			case SpecialChar.BottomTee:
+				AddRune (Curses.ACS_BTEE);
 				break;
 			}
 		}
diff --git a/Terminal.Gui/Views/ScrollView.cs b/Terminal.Gui/Views/ScrollView.cs
index 9bc13d04a..059c5574f 100644
--- a/Terminal.Gui/Views/ScrollView.cs
+++ b/Terminal.Gui/Views/ScrollView.cs
@@ -112,32 +112,54 @@ namespace Terminal.Gui {
 
 			if (true || ShowVerticalScrollIndicator) {
 				var bh = Bounds.Height;
-				var by1 = contentOffset.Y * bh/ contentSize.Height;
-				var by2 = (contentOffset.Y+bh) * bh/ contentSize.Height;
+				var by1 = -contentOffset.Y * bh/ contentSize.Height;
+				var by2 = (-contentOffset.Y+bh) * bh/ contentSize.Height;
 
 				for (int y = 0; y < bh; y++) {
 					Move (Bounds.Width - 1, y);
+					SpecialChar special;
+
 					if (y < by1 || y > by2)
-						Driver.AddSpecial (SpecialChar.Stipple);
-					else
-						Driver.AddSpecial (SpecialChar.Diamond);
+						special = SpecialChar.Stipple;
+					else {
+						if (by2 - by1 == 0)
+							special = SpecialChar.Diamond;
+						else {
+							if (y == by1)
+								special = SpecialChar.TopTee;
+							else if (y == by2)
+								special = SpecialChar.BottomTee;
+							else
+								special = SpecialChar.VLine;
+						}
+					}
+					Driver.AddSpecial (special);
 				}
 			}
 			if (true || ShowHorizontalScrollIndicator){
 				var bw = Bounds.Width;
-				var bx1 = contentOffset.X * bw / contentSize.Width;
-				var bx2 = (contentOffset.X + bw) * bw / contentSize.Width;
+				var bx1 = -contentOffset.X * bw / contentSize.Width;
+				var bx2 = (-contentOffset.X + bw) * bw / contentSize.Width;
 
 				Move (0, Bounds.Height - 1);
 				for (int x = 0; x < bw; x++) {
+					SpecialChar special;
+
 					if (x < bx1 || x > bx2){
-						SetColor (ColorScheme.Normal);
-						Driver.AddSpecial (SpecialChar.Stipple);
+						special = SpecialChar.Stipple;
 					} else {
-						// Driver.AddSpecial (SpecialChar.Diamond);
-						SetColor (ColorScheme.Focus);
-						Driver.AddSpecial (SpecialChar.Stipple);
+						if (bx2 - bx1 == 0)
+							special = SpecialChar.Diamond;
+						else {
+							if (x == bx1)
+								special = SpecialChar.LeftTee;
+							else if (x == bx2)
+								special = SpecialChar.RightTee;
+							else
+								special = SpecialChar.HLine;
+						}
 					}
+					Driver.AddSpecial (special);
 				}
 			}
 		}