7 my $v = AA::new($class, $id);
10 $v->DefSet('color', [ 0.7, 0, 0.7 ]);
11 $v->DefSet('gradient', 0.5);
14 $v->DefSet('rim-color', [ 0.1, 0, 0.1 ]);
16 $v->DefSet('label-color', [ 1, 1, 1 ]);
17 $v->DefSet('label-size', 1.5);
24 my ($x, $y, $r) = ($v->Get('x'), $v->Get('y'), $v->Get('r'));
25 my $grad = $v->Get('gradient');
26 my @col = @{$v->Get('color')};
31 my $lg = Cairo::RadialGradient->create($x, $y, 0, $x, $y, $r);
32 $lg->add_color_stop_rgb(0, @col);
36 $lg->add_color_stop_rgb(1, @col);
37 $cairo->set_source($lg);
39 $cairo->set_source_rgb(@col);
41 $cairo->arc($x, $y, $r, 0, $AA::TWOPI);
42 $cairo->fill_preserve;
44 $cairo->set_source_rgb(@{$v->Get('rim-color')});
45 $cairo->set_line_width($v->Get('rim'));
48 if ($v->Exists('label')) {
49 my $label = $v->Get('label');
50 $cairo->set_source_rgb(@{$v->Get('label-color')});
51 $cairo->set_font_size($r * $v->Get('label-size'));
52 my $xt = $cairo->text_extents($label);
53 $cairo->move_to($x - $xt->{'width'}/2 - $xt->{'x_bearing'},
54 $y - $xt->{'height'}/2 - $xt->{'y_bearing'});
55 $cairo->show_text($label);
64 my ($class, $id, $v, $w) = @_;
65 my $e = AA::new($class, $id);
66 $e->DefSet('color', [1, 1, 1]);
67 $e->DefSet('width', 3);
68 $e->DefSet('arrow', 0);
69 $e->DefSet('arrow-size', 20); # distance between arrow tip and back
70 $e->DefSet('arrow-span', 0.5); # fraction of arrow-size
71 $e->DefSet('overshoot', 3);
72 $e->DefBind('dir', sub {
73 my $dx = $w->Get('x') - $v->Get('x');
74 my $dy = $w->Get('y') - $v->Get('y');
75 my $d = sqrt($dx*$dx + $dy*$dy);
77 return [$dx/$d, $dy/$d];
82 $e->DefBind('ends', sub {
83 my $over = $e->Get('overshoot');
84 my $x1 = $v->Get('x');
85 my $y1 = $v->Get('y');
86 my $r1 = $v->Get('r') - $over;
87 my $x2 = $w->Get('x');
88 my $y2 = $w->Get('y');
89 my $r2 = $w->Get('r') - $over;
90 my ($dx,$dy) = @{$e->Get('dir')};
91 return [ $x1+$r1*$dx, $y1+$r1*$dy, $x2-$r2*$dx, $y2-$r2*$dy ];
99 my ($x1, $y1, $x2, $y2) = @{$e->Get('ends')};
100 $cairo->set_source_rgb(@{$e->Get('color')});
101 $cairo->set_line_width($e->Get('width'));
102 if (my $arrow = $e->Get('arrow')) {
103 my $size = $e->Get('arrow-size');
104 my $span = $size * $e->Get('arrow-span');
105 my ($dx,$dy) = @{$e->Get('dir')};
107 $cairo->move_to($x1, $y1);
108 $cairo->line_to($x2 - $dx*$size*0.9, $y2 - $dy*$size*0.9);
111 my ($ax,$ay) = (-$dy,$dx);
112 my ($bx,$by) = ($x2 - $dx*$size, $y2 - $dy*$size);
113 $cairo->move_to($x2, $y2);
114 $cairo->line_to($bx + $ax*$span, $by + $ay*$span);
115 $cairo->line_to($bx - $ax*$span, $by - $ay*$span);
119 $cairo->move_to($x1, $y1);
120 $cairo->line_to($x2, $y2);