Mercurial > hg > svgui

diff view/Pane.cpp @ 870:0cdaf382f21e tonioni

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Discard wildly excessive wheel events
author Chris Cannam
date Mon, 10 Nov 2014 09:54:20 +0000
parents 59a22f3bf86d
children 9855fc0927af a3b3b64fbc43 78e041e45ff0
line wrap: on
line diff
--- a/view/Pane.cpp	Mon Nov 10 09:20:06 2014 +0000
+++ b/view/Pane.cpp	Mon Nov 10 09:54:20 2014 +0000
@@ -2286,6 +2286,13 @@
         // Coarse wheel information (or vertical zoom, which is
         // necessarily coarse itself)
 
+        // Sometimes on Linux we're seeing absurdly extreme angles on
+        // the first wheel event -- discard those entirely
+        if (abs(m_pendingWheelAngle) > 1000) {
+            m_pendingWheelAngle = 0;
+            return;
+        }
+        
         while (abs(m_pendingWheelAngle) >= 120) {
 
             int sign = (m_pendingWheelAngle < 0 ? -1 : 1);