diff options
| -rw-r--r-- | src/Fl_Dial.cxx | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/src/Fl_Dial.cxx b/src/Fl_Dial.cxx index f8a1744f9..8dfc7a8c9 100644 --- a/src/Fl_Dial.cxx +++ b/src/Fl_Dial.cxx @@ -1,5 +1,5 @@ // -// "$Id: Fl_Dial.cxx,v 1.8 1999/03/08 21:44:30 carl Exp $" +// "$Id: Fl_Dial.cxx,v 1.9 1999/03/09 07:26:28 bill Exp $" // // Circular dial widget for the Fast Light Tool Kit (FLTK). // @@ -104,6 +104,7 @@ int Fl_Dial::handle(int event, int x, int y, int w, int h) { case FL_PUSH: handle_push(); case FL_DRAG: { + double oldangle = (a2-a1)*(value()-minimum())/(maximum()-minimum()) + a1; double angle; static double last = 0.0; double val = value(); @@ -112,11 +113,12 @@ int Fl_Dial::handle(int event, int x, int y, int w, int h) { if (!mx && !my) return 1; angle = atan2((float)-my, (float)-mx) + M_PI; angle = (angle*360) / (2*M_PI) + 90; - if (angle >= 360.0) angle -= 360.0; - if (a2 >= 360 && angle <= (a2-360)) angle += 360; - if (angle < a1 || angle > a2) { - if ((last - a1) < (a2 - last)) val = minimum(); - else val = maximum(); + while (angle < oldangle-180) angle += 360; + while (angle > oldangle+180) angle -= 360; + if (angle <= a1) { + val = minimum(); + } else if (angle >= a2) { + val = maximum(); } else { val = minimum() + (maximum()-minimum())*(angle-a1)/(a2-a1); last = angle; @@ -143,5 +145,5 @@ Fl_Dial::Fl_Dial(int x, int y, int w, int h, const char* l) } // -// End of "$Id: Fl_Dial.cxx,v 1.8 1999/03/08 21:44:30 carl Exp $". +// End of "$Id: Fl_Dial.cxx,v 1.9 1999/03/09 07:26:28 bill Exp $". // |