// // "$Id: Fl_Dial.cxx,v 1.7 1999/02/22 20:58:23 mike Exp $" // // Circular dial widget for the Fast Light Tool Kit (FLTK). // // Copyright 1998-1999 by Bill Spitzak and others. // // This library is free software; you can redistribute it and/or // modify it under the terms of the GNU Library General Public // License as published by the Free Software Foundation; either // version 2 of the License, or (at your option) any later version. // // This library is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU // Library General Public License for more details. // // You should have received a copy of the GNU Library General Public // License along with this library; if not, write to the Free Software // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 // USA. // // Please report all bugs and problems to "fltk-bugs@easysw.com". // #include #include #include #include #include void Fl_Dial::draw(int x, int y, int w, int h) { if (damage()&FL_DAMAGE_ALL) draw_box(box(), x, y, w, h, color()); x += Fl::box_dx(box()); y += Fl::box_dy(box()); w -= Fl::box_dw(box()); h -= Fl::box_dh(box()); double angle = 270.0*(value()-minimum())/(maximum()-minimum()); if (type() == FL_FILL_DIAL) { double a = angle; if (a < 0) a = 0; // foo: draw this nicely in certain round box types 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, 225, 225+360-a); fl_color(selection_color()); fl_pie(x, y, w-1, h-1, 225-a, 225); if (foo) { fl_color(FL_BLACK); fl_arc(x, y, w, h, 0, 360); } return; } if (!(damage()&FL_DAMAGE_ALL)) { fl_color(color()); fl_pie(x+1, y+1, w-2, h-2, 0, 360); } fl_push_matrix(); fl_translate(x+w/2-.5, y+h/2-.5); fl_scale(w-1, h-1); if (type() == FL_FILL_DIAL) { fl_rotate(225); fl_begin_line(); fl_vertex(0, 0); fl_vertex(.5, 0); fl_end_line(); } fl_rotate(-angle); fl_color(selection_color()); if (type() == FL_LINE_DIAL) { fl_begin_polygon(); fl_vertex(0.0, 0.0); fl_vertex(-0.04, 0.0); fl_vertex(-0.25, 0.25); fl_vertex(0.0, 0.04); fl_end_polygon(); fl_color(FL_BLACK); fl_begin_loop(); fl_vertex(0.0, 0.0); fl_vertex(-0.04, 0.0); fl_vertex(-0.25, 0.25); fl_vertex(0.0, 0.04); fl_end_loop(); } else { fl_begin_polygon(); fl_circle(-0.20, 0.20, 0.07); fl_end_polygon(); fl_color(FL_BLACK); fl_begin_loop(); fl_circle(-0.20, 0.20, 0.07); fl_end_loop(); } fl_pop_matrix(); } void Fl_Dial::draw() { draw(x(), y(), w(), h()); draw_label(); } int Fl_Dial::handle(int event, int x, int y, int w, int h) { switch (event) { case FL_PUSH: handle_push(); case FL_DRAG: { double angle; double val = value(); int mx = Fl::event_x()-x-w/2; int my = Fl::event_y()-y-h/2; if (!mx && !my) return 1; angle = atan2((float)-my, (float)-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) handle_drag(clamp(round(val))); } return 1; case FL_RELEASE: handle_release(); return 1; default: return 0; } } int Fl_Dial::handle(int e) { return handle(e, x(), y(), w(), h()); } 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 } // // End of "$Id: Fl_Dial.cxx,v 1.7 1999/02/22 20:58:23 mike Exp $". //