diff options
| author | Michael R Sweet <michael.r.sweet@gmail.com> | 1999-02-16 17:23:55 +0000 |
|---|---|---|
| committer | Michael R Sweet <michael.r.sweet@gmail.com> | 1999-02-16 17:23:55 +0000 |
| commit | 18312d3c1fb325c0d9ac92e98137cebbcadb563c (patch) | |
| tree | abc2a1a34ac821c56328e9bb7f81eebfe27f298e /src | |
| parent | 7b82bc3509d75dcfe5a560e5d6b4dc72ad2c0062 (diff) | |
Updated Fl_Dial to use atan2() to avoid possible math errors and reduce
code size.
git-svn-id: file:///fltk/svn/fltk/trunk@277 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
Diffstat (limited to 'src')
| -rw-r--r-- | src/Fl_Dial.cxx | 14 |
1 files changed, 3 insertions, 11 deletions
diff --git a/src/Fl_Dial.cxx b/src/Fl_Dial.cxx index a5a1060d2..1bb47fe90 100644 --- a/src/Fl_Dial.cxx +++ b/src/Fl_Dial.cxx @@ -1,5 +1,5 @@ // -// "$Id: Fl_Dial.cxx,v 1.5 1999/01/07 19:17:19 mike Exp $" +// "$Id: Fl_Dial.cxx,v 1.6 1999/02/16 17:23:55 mike Exp $" // // Circular dial widget for the Fast Light Tool Kit (FLTK). // @@ -101,15 +101,7 @@ int Fl_Dial::handle(int event, int x, int y, int w, int h) { int mx = Fl::event_x()-x-w/2; int my = Fl::event_y()-y-h/2; if (!mx && !my) return 1; - if (abs(mx) > abs(my)) { - angle = atan(-(double)my/mx); - if (mx>0) angle = 1.25*M_PI - angle; - else angle = 0.25*M_PI - angle; - } else { - angle = atan(-(double)mx/my); - if (my<0) angle = 0.75*M_PI + angle; - else angle = -0.25*M_PI + angle; - } + angle = atan2(-my, -mx) + 0.25 * M_PI; if (angle<(-0.25*M_PI)) angle += 2.0*M_PI; val = minimum() + (maximum()-minimum())*angle/(1.5*M_PI); if (fabs(val-value()) < (maximum()-minimum())/2.0) @@ -134,5 +126,5 @@ Fl_Dial::Fl_Dial(int x, int y, int w, int h, const char* l) } // -// End of "$Id: Fl_Dial.cxx,v 1.5 1999/01/07 19:17:19 mike Exp $". +// End of "$Id: Fl_Dial.cxx,v 1.6 1999/02/16 17:23:55 mike Exp $". // |