test/unittest_lines.cxx

   1 //
   2 // "$Id: unittest_lines.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 line drawing capabilities of this implementation ----------
  33 //
  34 class LineTest : public Fl_Box {
  35 public:
  36   static Fl_Widget *create() {
  37     return new LineTest(TESTAREA_X, TESTAREA_Y, TESTAREA_W, TESTAREA_H);
  38   }
  39   LineTest(int x, int y, int w, int h) : Fl_Box(x, y, w, h) {
  40     label("testing the integer based fl_line calls\n"
  41           "No red pixels should be visible.\n"
  42           "If you see bright red pixels, the line drawing alignment is off,\n"
  43           "or the last pixel in a line does not get drawn.\n"
  44           "If you see dark red pixels, anti-aliasing must be switched off.");
  45     align(FL_ALIGN_INSIDE|FL_ALIGN_BOTTOM|FL_ALIGN_LEFT|FL_ALIGN_WRAP);
  46     box(FL_BORDER_BOX);
  47   }
  48   void draw() {
  49     Fl_Box::draw();
  50     int a = x()+10, b = y()+10; fl_color(FL_BLACK); fl_rect(a, b, 100, 100);
  51     // testing fl_xyline(x, y, x1)
  52     fl_color(FL_RED); fl_point(a+10, b+10); fl_point(a+20, b+10);
  53     fl_color(FL_BLACK); fl_xyline(a+10, b+10, a+20);
  54     // testing fl_xyline(x, y, x1, y2);
  55     fl_color(FL_RED); fl_point(a+10, b+20); fl_point(a+20, b+20);
  56     fl_point(a+20, b+30);
  57     fl_color(FL_BLACK); fl_xyline(a+10, b+20, a+20, b+30);
  58     // testing fl_xyline(x, y, x1, y2, x3);
  59     fl_color(FL_RED); fl_point(a+10, b+40); fl_point(a+20, b+40);
  60     fl_point(a+20, b+50); fl_point(a+30, b+50);
  61     fl_color(FL_BLACK); fl_xyline(a+10, b+40, a+20, b+50, a+30);
  62     //+++ add testing for the fl_yxline commands!
  63     // testing fl_loop(x,y, x,y, x,y, x, y)
  64     fl_color(FL_RED); fl_point(a+60, b+60); fl_point(a+90, b+60);
  65     fl_point(a+60, b+90); fl_point(a+90, b+90);
  66     fl_color(FL_BLACK);
  67     fl_loop(a+60, b+60, a+90, b+60, a+90, b+90, a+60, b+90);
  68   }
  69 };
  70
  71 UnitTest lines("drawing lines", LineTest::create);
  72
  73 //
  74 // End of "$Id: unittest_lines.cxx 7913 2010-11-29 18:18:27Z greg.ercolano $"
  75 //