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changeset 17374:1102c81e9d60

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Eliminate hysteresis when using mouse wheel for zooming in FLTK. Zooming in N steps and zooming out N steps now returns to original magnification. * libinterp/dldfcn/__init_fltk__.cc(handle): Zoom by factor or 1/factor.
author Rik <rik@octave.org>
date Tue, 03 Sep 2013 17:20:17 -0700
parents 9b7ca74489c7
children e0b9d43395e2
files libinterp/dldfcn/__init_fltk__.cc
diffstat 1 files changed, 1 insertions(+), 1 deletions(-) [+]
line wrap: on
line diff
--- a/libinterp/dldfcn/__init_fltk__.cc
+++ b/libinterp/dldfcn/__init_fltk__.cc
@@ -1392,7 +1392,7 @@
 
                   // Determine if we're zooming in or out.
                   const double factor =
-                    (Fl::event_dy () > 0) ? 1.0 + Vwheel_zoom_speed
+                    (Fl::event_dy () > 0) ? 1 / (1.0 - Vwheel_zoom_speed)
                                           : 1.0 - Vwheel_zoom_speed;
 
                   // Get the point we're zooming about.