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I'm going to discard this, as I mentioned I don't think this smooth scrolling thing is something that should be implemented in Okular but on lower layers. - Albert Astals Cid On gen. 31, 2014, 2:07 p.m., Yichao Zhou wrote: > > ----------------------------------------------------------- > This is an automatically generated e-mail. To reply, visit: > https://git.reviewboard.kde.org/r/115413/ > ----------------------------------------------------------- > > (Updated gen. 31, 2014, 2:07 p.m.) > > > Review request for Okular. > > > Bugs: 319870 > http://bugs.kde.org/show_bug.cgi?id=319870 > > > Repository: okular > > > Description > ------- > > This implements https://bugs.kde.org/show_bug.cgi?id=319870. > > This patch is largely inspired by a firefox extension, called "SmoothWheel". > > This patch only affects the behaviour of mouse wheel, not the scroll bar. > This is because in order to make the scroll bar have smooth scroll feature, > we need to totally rewrite QScrollBar and QScrollArea, which is a too big > task for me. > > It provides following parameter to control the behavior the smooth scrolling: > 1. FPS (Frames per second): control the fluency of the smooth scrolling. > 2. Duration: How long does it take to finish a mouse wheel scroll. > 3. SmoothMode: The function of time t and the scroll speed s: s = f(t). A > user can choose from the following four. Suppose t is defined at [-m, +m], > and a, b, c, d are some constant: > I. CONSTANT: f(t) = c > II. LINEAR: f(t) = (m - |t|) * c > III. QUADRATIC: f(t) = a - b*t^2 > IV. COSINE: f(t) = (cos(c*t) + 1)/d > > a, b, c, d are determined by equation \integral_{-m}^{+m} f(t) dt = 1. > > 4. Acceration: Dynamic change the step size: when a user scroll his mouse > frequently, we will increase its step size so that the user can enjoy a > faster scroll. > 5. Big Step Modifier: When user press a modifier (by default, Alt) key and > scroll his wheel, the step size will be bigger (by default, 5 times). > 6. Small Step Modifier: When user press a modifier (by default, Shift) key > and scroll his wheel, the step size will be smaller (by default, 1/5). > > I hope all these settings will be exposed to the user finally. I will > implement the configuration UI after > > https://git.reviewboard.kde.org/r/115335 > > is merged. Should I open a new configuration page since this will occupy > some space? Anyway, that should be relatively easy since all the interfaces > are implemented. > > > Diffs > ----- > > ui/qsmoothscrollarea.cpp PRE-CREATION > ui/qsmoothscrollarea.h PRE-CREATION > ui/pageview.h 9c15af6 > ui/pageview.cpp 65967bf > CMakeLists.txt 63d2922 > > Diff: https://git.reviewboard.kde.org/r/115413/diff/ > > > Testing > ------- > > > Thanks, > > Yichao Zhou > >
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