From: John Levon <levon@movementarian.org>
Date: Mon, 21 Oct 2002 15:29:41 +0000 (+0000)
Subject: Fix broken changes of wheel mouse. Sorry !
X-Git-Tag: 1.6.10~18133
X-Git-Url: https://git.lyx.org/gitweb/?a=commitdiff_plain;h=e0660589c44ac5f3b2920be0db260fff58290b53;p=lyx.git

Fix broken changes of wheel mouse. Sorry !


git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@5460 a592a061-630c-0410-9148-cb99ea01b6c8
---

diff --git a/src/BufferView_pimpl.C b/src/BufferView_pimpl.C
index eeb0c4383a..2f4848f6a2 100644
--- a/src/BufferView_pimpl.C
+++ b/src/BufferView_pimpl.C
@@ -393,11 +393,12 @@ void BufferView::Pimpl::scroll(int lines)
 	LyXText const * t = bv_->text;
 	int const line_height = t->defaultHeight();
 
-	int const disp = lines * line_height;
+	// The new absolute coordinate
+	int new_first_y = t->first_y + lines * line_height;
 
 	// Restrict to a valid value
-	int new_first_y = std::min(t->height - 4 * line_height, disp);
-	new_first_y = std::max(0, disp);
+	new_first_y = std::min(t->height - 4 * line_height, new_first_y);
+	new_first_y = std::max(0, new_first_y);
 
 	scrollDocView(new_first_y);