Changes Fl_Dial to use XForms defaults for angles

-Carl


git-svn-id: file:///fltk/svn/fltk/trunk@397 ea41ed52-d2ee-0310-a9c1-e6b18d33e121

documentation/Fl_Dial.html

@@ -34,12 +34,12 @@ and label string. The default type is <TT>FL_NORMAL_DIAL</TT>.
  Destroys the valuator. 
 <H4><A name=Fl_Dial.angles>void Fl_Dial::angles(short a, short b)</A></H4>
  Sets the angles used for the minimum and maximum values.  By default 
-these are 225 and 135, respectively.  (0 degrees is straight up and the
+these are 0 and 360, respectively.  (0 degrees is straight down and the
 angles progress clockwise.)  The angles specified should be greater than
-or equal to 0 and less than 360.  The progress of the dial always starts at
+or equal to 0 and less than or equal to 360.  The progress of the dial always
-the minimum angle and progresses clockwise to the maximum angle.  Currently,
+starts at the minimum angle and progresses clockwise to the maximum angle. 
-counter-clockwise progression is not supported (but user code can always
+Currently, counter-clockwise progression is not supported (but user code can
-use 1/value()).
+always use 1/value()).
 <H4><A name=Fl_Dial.type>type(uchar)</A></H4>
  Sets the type of the dial to: 
 <UL>

src/Fl_Dial.cxx

@@ -1,5 +1,5 @@
 //
-// "$Id: Fl_Dial.cxx,v 1.10 1999/03/09 07:51:10 bill Exp $"
+// "$Id: Fl_Dial.cxx,v 1.11 1999/03/10 00:13:52 carl Exp $"
 //
 // Circular dial widget for the Fast Light Tool Kit (FLTK).
 //
@@ -50,9 +50,9 @@ void Fl_Dial::draw(int x, int y, int w, int h) {
     int foo = (box() > _FL_ROUND_UP_BOX && Fl::box_dx(box()));
     if (foo) {x--; y--; w+=2; h+=2;}
     fl_color(color());
-    fl_pie(x, y, w-1, h-1, 90-a1, 360+90-angle);
+    fl_pie(x, y, w-1, h-1, 270-a1, 360+270-angle);
     fl_color(selection_color());
-    fl_pie(x, y, w-1, h-1, 90-angle, 90-a1);
+    fl_pie(x, y, w-1, h-1, 270-angle, 270-a1);
     if (foo) {
       fl_color(FL_BLACK);
       fl_arc(x, y, w, h, 0, 360);
@@ -72,7 +72,7 @@ void Fl_Dial::draw(int x, int y, int w, int h) {
     fl_begin_line(); fl_vertex(0, 0); fl_vertex(.5, 0); fl_end_line();
   }
 */
-  fl_rotate(225-angle);
+  fl_rotate(45-angle);
   fl_color(selection_color());
   if (type() == FL_LINE_DIAL) {
     fl_begin_polygon();
@@ -114,7 +114,7 @@ int Fl_Dial::handle(int event, int x, int y, int w, int h) {
     int my = Fl::event_y()-y-h/2;
     if (!mx && !my) return 1;
     angle = atan2((float)-my, (float)-mx) + M_PI;
-    angle = (angle*360) / (2*M_PI) + 90;
+    angle = (angle*360) / (2*M_PI) + 270;
     while (angle < oldangle-180) angle += 360;
     while (angle > oldangle+180) angle -= 360;
     if (angle <= a1) {
@@ -143,9 +143,9 @@ Fl_Dial::Fl_Dial(int x, int y, int w, int h, const char* l)
   : Fl_Valuator(x, y, w, h, l) {
   box(FL_OVAL_BOX);
   selection_color(FL_INACTIVE_COLOR); // was 37
-  angles(225,135);
+  angles(0,360);
 }
 
 //
-// End of "$Id: Fl_Dial.cxx,v 1.10 1999/03/09 07:51:10 bill Exp $".
+// End of "$Id: Fl_Dial.cxx,v 1.11 1999/03/10 00:13:52 carl Exp $".
 //

test/valuators.fl

@@ -133,20 +133,22 @@ fflush(stdout);}
       callback {printf("%g      \\r",o->value());
 fflush(stdout);} selected
       xywh {315 280 65 65} color 10 selection_color 1 labelsize 8
-      code0 {o->angles(180,135);}
+      code0 {o->angles(0,315);}
     }
     Fl_Dial {} {
       label FL_LINE_DIAL
       callback {printf("%g      \\r",o->value());
 fflush(stdout);}
       xywh {395 280 65 65} type Line color 10 selection_color 1 labelsize 8
-      code0 {o->angles(0,360);}
+      code1 {o->value(0.5);}
     }
     Fl_Dial {} {
       label FL_FILL_DIAL
       callback {printf("%g      \\r",o->value());
 fflush(stdout);}
       xywh {475 280 65 65} type Fill color 10 selection_color 1 labelsize 8
+      code0 {o->angles(45,315);}
+      code1 {o->value(1.0);}
     }
     Fl_Box {} {
       label Fl_Roller