// // "$Id$" // // Circular dial widget for the Fast Light Tool Kit (FLTK). // // Copyright 1998-2010 by Bill Spitzak and others. // // This library is free software. Distribution and use rights are outlined in // the file "COPYING" which should have been included with this file. If this // file is missing or damaged, see the license at: // // http://www.fltk.org/COPYING.php // // Please report all bugs and problems on the following page: // // http://www.fltk.org/str.php // #include #include #include #include #include #include #include // All angles are measured with 0 to the right and counter-clockwise /** Draws dial at given position and size. \param[in] X, Y, W, H position and size */ 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 = (a2-a1)*(value()-minimum())/(maximum()-minimum()) + a1; if (type() == FL_FILL_DIAL) { // 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;} if (active_r()) fl_color(color()); else fl_color(fl_inactive(color())); fl_pie(X, Y, W, H, 270-a1, angle > a1 ? 360+270-angle : 270-360-angle); if (active_r()) fl_color(selection_color()); else fl_color(fl_inactive(selection_color())); fl_pie(X, Y, W, H, 270-angle, 270-a1); if (foo) { if (active_r()) fl_color(FL_FOREGROUND_COLOR); else fl_color(fl_inactive(FL_FOREGROUND_COLOR)); fl_arc(X, Y, W, H, 0, 360); } return; } if (!(damage()&FL_DAMAGE_ALL)) { if (active_r()) fl_color(color()); else fl_color(fl_inactive(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); fl_rotate(45-angle); if (active_r()) fl_color(selection_color()); else fl_color(fl_inactive(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(); if (active_r()) fl_color(FL_FOREGROUND_COLOR); else fl_color(fl_inactive(FL_FOREGROUND_COLOR)); 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(); if (active_r()) fl_color(FL_FOREGROUND_COLOR); else fl_color(fl_inactive(FL_FOREGROUND_COLOR)); fl_begin_loop(); fl_circle(-0.20, 0.20, 0.07); fl_end_loop(); } fl_pop_matrix(); } /** Draws dial at current position and size. */ void Fl_Dial::draw() { draw(x(), y(), w(), h()); draw_label(); } /** Allows subclasses to handle event based on given position and size. \param[in] event, X, Y, W, H event to handle, related position and size. */ int Fl_Dial::handle(int event, int X, int Y, int W, int H) { switch (event) { case FL_PUSH: handle_push(); /* FALLTHROUGH */ case FL_DRAG: { int mx = (Fl::event_x()-X-W/2)*H; int my = (Fl::event_y()-Y-H/2)*W; if (!mx && !my) return 1; double angle = 270-atan2((float)-my, (float)mx)*180/M_PI; double oldangle = (a2-a1)*(value()-minimum())/(maximum()-minimum()) + a1; while (angle < oldangle-180) angle += 360; while (angle > oldangle+180) angle -= 360; double val; if ((a1= a1)) { val = minimum(); } else if ((a1= a2) : (angle <= a2)) { val = maximum(); } else { val = minimum() + (maximum()-minimum())*(angle-a1)/(a2-a1); } handle_drag(clamp(round(val))); return 1; } /* NOTREACHED */ case FL_RELEASE: handle_release(); return 1; case FL_ENTER: /* FALLTHROUGH */ case FL_LEAVE: return 1; default: return 0; } } /** Allow subclasses to handle event based on current position and size. */ 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) /** Creates a new Fl_Dial widget using the given position, size, and label string. The default type is FL_NORMAL_DIAL. */ : Fl_Valuator(X, Y, W, H, l) { box(FL_OVAL_BOX); selection_color(FL_INACTIVE_COLOR); // was 37 a1 = 45; a2 = 315; } Fl_Fill_Dial::Fl_Fill_Dial(int X,int Y,int W,int H, const char *L) : Fl_Dial(X,Y,W,H,L) { type(FL_FILL_DIAL); } Fl_Line_Dial::Fl_Line_Dial(int X,int Y,int W,int H, const char *L) : Fl_Dial(X,Y,W,H,L) { type(FL_LINE_DIAL); } // // End of "$Id$". //