test/unittest_circles.cxx

   1 //
   2 // "$Id: unittest_circles.cxx 7913 2010-11-29 18:18:27Z greg.ercolano $"
   3 //
   4 // Unit tests for the Fast Light Tool Kit (FLTK).
   5 //
   6 // Copyright 1998-2010 by Bill Spitzak and others.
   7 //
   8 // This library is free software; you can redistribute it and/or
   9 // modify it under the terms of the GNU Library General Public
  10 // License as published by the Free Software Foundation; either
  11 // version 2 of the License, or (at your option) any later version.
  12 //
  13 // This library is distributed in the hope that it will be useful,
  14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16 // Library General Public License for more details.
  17 //
  18 // You should have received a copy of the GNU Library General Public
  19 // License along with this library; if not, write to the Free Software
  20 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  21 // USA.
  22 //
  23 // Please report all bugs and problems on the following page:
  24 //
  25 //     http://www.fltk.org/str.php
  26 //
  27
  28 #include <FL/Fl_Box.H>
  29 #include <FL/fl_draw.H>
  30
  31 //
  32 //------- test the circle drawing capabilities of this implementation ----------
  33 //
  34 class CircleTest : public Fl_Box {
  35 public:
  36   static Fl_Widget *create() {
  37     return new CircleTest(TESTAREA_X, TESTAREA_Y, TESTAREA_W, TESTAREA_H);
  38   }
  39   CircleTest(int x, int y, int w, int h) : Fl_Box(x, y, w, h) {
  40     label("testing int drawing of circles and ovals (fl_arc, fl_pie)\n"
  41           "No red lines should be visible. "
  42           "If you see bright red pixels, the circle drawing alignment is off. "
  43           "If you see dark red pixels, your system supports anti-aliasing "
  44           "which should be of no concern. "
  45           "The green rectangles should not be overwritten by circle drawings.");
  46     align(FL_ALIGN_INSIDE|FL_ALIGN_BOTTOM|FL_ALIGN_LEFT|FL_ALIGN_WRAP);
  47     box(FL_BORDER_BOX);
  48   }
  49   void draw() {
  50     Fl_Box::draw();
  51     int a = x()+10, b = y()+10; fl_color(FL_BLACK); fl_rect(a, b, 100, 100);
  52     // test fl_arc for full circles
  53     fl_color(FL_GREEN); fl_rect(a+ 9, b+ 9, 33, 33);
  54     fl_color(FL_RED); fl_xyline(a+24, b+10, a+27); fl_xyline(a+24, b+40, a+27);
  55     fl_yxline(a+10, b+24, b+27); fl_yxline(a+40, b+24, b+27);
  56     fl_color(FL_BLACK); fl_arc(a+10, b+10, 31, 31, 0.0, 360.0);
  57     // test fl_arc segmet 1
  58     fl_color(FL_GREEN); fl_rect(a+54, b+ 4, 43, 43);
  59     fl_rect(a+54, b+4, 18, 18); fl_rect(a+79, b+29, 18, 18);
  60     fl_color(FL_RED); fl_point(a+55, b+30); fl_point(a+70, b+45);
  61     fl_point(a+80, b+5); fl_point(a+95, b+20);
  62     fl_color(FL_BLACK); fl_arc(a+65, b+ 5, 31, 31, -35.0, 125.0);
  63     // test fl_arc segmet 2
  64     fl_color(FL_BLACK); fl_arc(a+55, b+15, 31, 31, 145.0, 305.0);
  65     // test fl_pie for full circles
  66     fl_color(FL_RED); fl_xyline(a+24, b+60, a+27); fl_xyline(a+24, b+90, a+27);
  67     fl_yxline(a+10, b+74, b+77); fl_yxline(a+40, b+74, b+77);
  68     fl_color(FL_GREEN); fl_rect(a+ 9, b+59, 33, 33);
  69     fl_color(FL_BLACK); fl_pie(a+10, b+60, 31, 31, 0.0, 360.0);
  70     // test fl_pie segmet 1
  71     fl_color(FL_GREEN); fl_rect(a+54, b+54, 43, 43);
  72     fl_rect(a+54, b+54, 18, 18); fl_rect(a+79, b+79, 18, 18);
  73     fl_point(a+79, b+71); fl_point(a+71, b+79);
  74     fl_color(FL_RED); fl_point(a+55, b+80); fl_point(a+70, b+95);
  75     fl_point(a+80, b+55); fl_point(a+95, b+70);
  76     fl_point(a+81, b+69); fl_point(a+69, b+81);
  77     fl_color(FL_BLACK); fl_pie(a+65, b+55, 31, 31, -30.0, 120.0);
  78     // test fl_pie segmet 2
  79     fl_color(FL_BLACK); fl_pie(a+55, b+65, 31, 31, 150.0, 300.0);
  80     //---- oval testing (horizontal squish)
  81     a +=120; b += 0; fl_color(FL_BLACK); fl_rect(a, b, 100, 100);
  82     fl_color(FL_GREEN);
  83     fl_rect(a+19, b+9, 63, 33); fl_rect(a+19, b+59, 63, 33);
  84     fl_color(FL_BLACK);
  85     fl_arc(a+20, b+10, 61, 31, 0, 360); fl_pie(a+20, b+60, 61, 31, 0, 360);
  86     //---- oval testing (horizontal squish)
  87     a += 120; b += 0; fl_color(FL_BLACK); fl_rect(a, b, 100, 100);
  88     fl_color(FL_GREEN);
  89     fl_rect(a+9, b+19, 33, 63); fl_rect(a+59, b+19, 33, 63);
  90     fl_color(FL_BLACK);
  91     fl_arc(a+10, b+20, 31, 61, 0, 360); fl_pie(a+60, b+20, 31, 61, 0, 360);
  92   }
  93 };
  94
  95 UnitTest circle("circles and arcs", CircleTest::create);
  96
  97 //
  98 // End of "$Id: unittest_circles.cxx 7913 2010-11-29 18:18:27Z greg.ercolano $"
  99 //