From 3bca6b699abcb16fa05067c99398b3a5d875e8e1 Mon Sep 17 00:00:00 2001
From: Angelo Geels <spansjh@gmail.com>
Date: Fri, 11 Jul 2014 21:21:17 +0200
Subject: [PATCH] Implemented input_hscrollbar_left_trough

---
 src/game.c | 47 ++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 46 insertions(+), 1 deletion(-)

diff --git a/src/game.c b/src/game.c
index 181d56f37b..e460e2ec86 100644
--- a/src/game.c
+++ b/src/game.c
@@ -775,6 +775,51 @@ static void input_hscrollbar_rightbutton(rct_window* w)
 	window_invalidate_by_id(widgetIndex, windowClass);
 }
 
+/**
+ *  Horizontal scrollbar's left trough was clicked
+ *  rct2: 0x006E9B47
+ */
+static void input_hscrollbar_left_trough(rct_window* w)
+{
+	rct_windowclass windowClass;
+	rct_windownumber windowNumber;
+	rct_window* w2;
+	rct_widget* widget;
+	rct_scroll* scroll;
+	uint16 widgetIndex;
+	sint16 left, widgetWidth;
+
+	windowClass = RCT2_GLOBAL(RCT2_ADDRESS_CURSOR_DOWN_WINDOWCLASS, rct_windowclass);
+	windowNumber = RCT2_GLOBAL(RCT2_ADDRESS_CURSOR_DOWN_WINDOWNUMBER, rct_windownumber);
+	w2 = window_find_by_id(windowClass, windowNumber);
+
+	if (w2 == NULL)
+		return;
+
+	widgetIndex = RCT2_GLOBAL(RCT2_ADDRESS_CURSOR_DOWN_WIDGETINDEX, uint16);
+
+	widget = &w->widgets[widgetIndex];
+	scroll = w->scrolls + RCT2_GLOBAL(0x009DE54C, uint32);
+
+	left = scroll->h_left;
+
+	widgetWidth = widget->right - widget->left - 1;
+	if (scroll->flags & 0x0010)
+		widgetWidth -= 11;
+	left -= widgetWidth;
+	if (left < 0)
+		left = 0;
+	scroll->h_left = left;
+
+	widget_scroll_update_thumbs(w, widgetIndex);
+
+	widgetIndex = RCT2_GLOBAL(RCT2_ADDRESS_CURSOR_DOWN_WIDGETINDEX, uint8);
+	windowClass = RCT2_GLOBAL(RCT2_ADDRESS_CURSOR_DOWN_WINDOWCLASS, uint8);
+	windowClass |= 0x80;
+
+	window_invalidate_by_id(widgetIndex, windowClass);
+}
+
 /**
  *  Vertical scrollbar's "top" button held down, scroll it upwards
  *  rct2: 0x006E9C37
@@ -969,7 +1014,7 @@ static void input_leftmousedown(int x, int y, rct_window *w, int widgetIndex)
 			break;
 		case SCROLL_PART_HSCROLLBAR_LEFT_TROUGH:
 			// 0x006E9B47
-			RCT2_CALLPROC_X(0x006E9B47, 0, 0, 0, 0, (int)w, 0, 0);
+			input_hscrollbar_left_trough(w);
 			break;
 		case SCROLL_PART_HSCROLLBAR_RIGHT_TROUGH:
 			// 0x006E9BB7