1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
|
//
// Unit tests 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:
//
// https://www.fltk.org/COPYING.php
//
// Please see the following page on how to report bugs and issues:
//
// https://www.fltk.org/bugs.php
//
#include <FL/Fl_Box.H>
#include <FL/fl_draw.H>
//
//------- test the line drawing capabilities of this implementation ----------
//
class LineTest : public Fl_Box {
public:
static Fl_Widget *create() {
return new LineTest(TESTAREA_X, TESTAREA_Y, TESTAREA_W, TESTAREA_H);
}
LineTest(int x, int y, int w, int h) : Fl_Box(x, y, w, h) {
label("testing the integer based fl_line calls\n"
"No red pixels should be visible.\n"
"If you see bright red pixels, the line drawing alignment is off,\n"
"or the last pixel in a line does not get drawn.\n"
"If you see dark red pixels, anti-aliasing must be switched off.");
align(FL_ALIGN_INSIDE|FL_ALIGN_BOTTOM|FL_ALIGN_LEFT|FL_ALIGN_WRAP);
box(FL_BORDER_BOX);
}
void draw() {
Fl_Box::draw();
int i, a = x()+10, b = y()+10; fl_color(FL_BLACK); fl_rect(a, b, 100, 100);
// testing fl_xyline(x, y, x1)
fl_color(FL_RED); fl_point(a+10, b+10); fl_point(a+20, b+10);
fl_color(FL_BLACK); fl_xyline(a+10, b+10, a+20);
// testing fl_xyline(x, y, x1, y2);
fl_color(FL_RED); fl_point(a+10, b+20); fl_point(a+20, b+20);
fl_point(a+20, b+30);
fl_color(FL_BLACK); fl_xyline(a+10, b+20, a+20, b+30);
// testing fl_xyline(x, y, x1, y2, x3);
fl_color(FL_RED); fl_point(a+10, b+40); fl_point(a+20, b+40);
fl_point(a+20, b+50); fl_point(a+30, b+50);
fl_color(FL_BLACK); fl_xyline(a+10, b+40, a+20, b+50, a+30);
//+++ add testing for the fl_yxline commands!
// testing fl_loop(x,y, x,y, x,y, x, y)
fl_color(FL_RED); fl_point(a+60, b+60); fl_point(a+90, b+60);
fl_point(a+60, b+90); fl_point(a+90, b+90);
fl_color(FL_BLACK);
fl_loop(a+60, b+60, a+90, b+60, a+90, b+90, a+60, b+90);
a = x()+120, b = y()+10; fl_color(FL_BLACK); fl_rect(a, b, 203, 203);
a += 101; b += 101;
fl_color(0xff888800);
for (i=-80; i<=80; i+=20) fl_line(a, b, a+i, b-100);
fl_color(0xff444400);
for (i=-80; i<=80; i+=20) fl_line(a, b, a+i, b+100);
fl_color(0x88ff8800);
for (i=-80; i<=80; i+=20) fl_line(a, b, a-100, b+i);
fl_color(0x44ff4400);
for (i=-80; i<=80; i+=20) fl_line(a, b, a+100, b+i);
fl_color(0x8888ff00);
fl_line(a, b, a-100, b-100);
fl_line(a, b, a+100, b-100);
fl_line(a, b, a+100, b+100);
fl_line(a, b, a-100, b+100);
}
};
UnitTest lines("drawing lines", LineTest::create);
|
