From d8567d269926e10e95c079c4fa13d59e8fe8c6ea Mon Sep 17 00:00:00 2001
From: alberth <alberth@openttd.org>
Date: Sun, 9 Jan 2011 15:25:33 +0000
Subject: [PATCH] (svn r21754) -Codechange: Scroll the matrix widget to make a
 clicked entry fully visible.

---
 src/widget.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/widget.cpp b/src/widget.cpp
index 4f2c498f28..559f8d3919 100644
--- a/src/widget.cpp
+++ b/src/widget.cpp
@@ -1374,6 +1374,13 @@ void NWidgetMatrix::SetColour(Colours colour)
 void NWidgetMatrix::SetClicked(int clicked)
 {
 	this->clicked = clicked;
+	if (this->sb != NULL && this->widgets_x != 0) {
+		int vpos = (this->clicked / this->widgets_x) * this->widget_h; // Vertical position of the top.
+		/* Need to scroll down -> Scroll to the bottom.
+		 * However, last entry has no 'this->pip_inter' underneath, and we must stay below this->sb->GetCount() */
+		if (this->sb->GetPosition() < vpos) vpos += this->widget_h - this->pip_inter - 1;
+		this->sb->ScrollTowards(vpos);
+	}
 }
 
 /**