1 | // |
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2 | // "$Id: arc.cxx 7978 2010-12-08 14:00:35Z AlbrechtS $" |
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3 | // |
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4 | // Arc drawing test program for the Fast Light Tool Kit (FLTK). |
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5 | // |
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6 | // Copyright 1998-2010 by Bill Spitzak and others. |
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7 | // |
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8 | // This library is free software; you can redistribute it and/or |
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9 | // modify it under the terms of the GNU Library General Public |
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10 | // License as published by the Free Software Foundation; either |
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11 | // version 2 of the License, or (at your option) any later version. |
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12 | // |
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13 | // This library is distributed in the hope that it will be useful, |
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14 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
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15 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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16 | // Library General Public License for more details. |
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17 | // |
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18 | // You should have received a copy of the GNU Library General Public |
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19 | // License along with this library; if not, write to the Free Software |
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20 | // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 |
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21 | // USA. |
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22 | // |
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23 | // Please report all bugs and problems on the following page: |
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24 | // |
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25 | // http://www.fltk.org/str.php |
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26 | // |
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27 | |
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28 | #include <FL/Fl.H> |
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29 | #include <FL/Fl_Double_Window.H> |
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30 | #include <FL/Fl_Hor_Value_Slider.H> |
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31 | #include <FL/fl_draw.H> |
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32 | |
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33 | double args[6] = {140, 140, 50, 0, 360, 0}; |
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34 | const char* name[6] = {"X", "Y", "R", "start", "end", "rotate"}; |
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35 | |
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36 | class Drawing : public Fl_Widget { |
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37 | void draw() { |
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38 | fl_push_clip(x(),y(),w(),h()); |
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39 | fl_color(FL_DARK3); |
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40 | fl_rectf(x(),y(),w(),h()); |
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41 | fl_push_matrix(); |
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42 | if (args[5]) { |
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43 | fl_translate(x()+w()/2.0, y()+h()/2.0); |
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44 | fl_rotate(args[5]); |
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45 | fl_translate(-(x()+w()/2.0), -(y()+h()/2.0)); |
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46 | } |
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47 | fl_color(FL_WHITE); |
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48 | fl_translate(x(),y()); |
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49 | fl_begin_complex_polygon(); |
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50 | fl_arc(args[0],args[1],args[2],args[3],args[4]); |
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51 | fl_gap(); |
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52 | fl_arc(140,140,20,0,-360); |
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53 | fl_end_complex_polygon(); |
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54 | fl_color(FL_RED); |
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55 | fl_begin_line(); |
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56 | fl_arc(args[0],args[1],args[2],args[3],args[4]); |
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57 | fl_end_line(); |
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58 | fl_pop_matrix(); |
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59 | fl_pop_clip(); |
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60 | } |
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61 | public: |
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62 | Drawing(int X,int Y,int W,int H) : Fl_Widget(X,Y,W,H) {} |
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63 | }; |
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64 | |
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65 | Drawing *d; |
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66 | |
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67 | void slider_cb(Fl_Widget* o, void* v) { |
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68 | Fl_Slider* s = (Fl_Slider*)o; |
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69 | args[fl_intptr_t(v)] = s->value(); |
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70 | d->redraw(); |
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71 | } |
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72 | |
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73 | int main(int argc, char** argv) { |
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74 | Fl_Double_Window window(300,500); |
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75 | Drawing drawing(10,10,280,280); |
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76 | d = &drawing; |
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77 | |
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78 | int y = 300; |
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79 | for (int n = 0; n<6; n++) { |
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80 | Fl_Slider* s = new Fl_Hor_Value_Slider(50,y,240,25,name[n]); y += 25; |
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81 | if (n<3) {s->minimum(0); s->maximum(300);} |
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82 | else if (n==5) {s->minimum(0); s->maximum(360);} |
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83 | else {s->minimum(-360); s->maximum(360);} |
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84 | s->step(1); |
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85 | s->value(args[n]); |
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86 | s->align(FL_ALIGN_LEFT); |
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87 | s->callback(slider_cb, (void*)n); |
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88 | } |
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89 | |
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90 | window.end(); |
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91 | window.show(argc,argv); |
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92 | return Fl::run(); |
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93 | } |
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94 | |
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95 | |
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96 | // |
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97 | // End of "$Id: arc.cxx 7978 2010-12-08 14:00:35Z AlbrechtS $". |
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98 | // |
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99 | |
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