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
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
|
#!/usr/bin/perl -w
use strict;
package DrawView;
use TQt;
use TQt::isa qw(TQt::Widget);
use TQt::slots
updateIt => ['int'],
printIt => [];
use TQt::attributes qw(
printer
bgroup
_print
drawindex
maxindex
);
#
# First we define the functionality our demo should present
# to the user. You might add different demo-modes if you wish so
#
#
# This function draws a color wheel.
# The coordinate system x=(0..500), y=(0..500) spans the paint device.
#
sub drawColorWheel {
my $p = shift;
my $f = TQt::Font("times", 18, &TQt::Font::Bold);
$p->setFont($f);
$p->setPen(&black);
$p->setWindow(0, 0, 500, 500); # defines coordinate system
for my $i (0..35) {
my $matrix = TQt::WMatrix;
$matrix->translate(250.0, 250.0); # move to center
$matrix->shear(0.0, 0.3); # twist it
$matrix->rotate($i*10.0); # rotate 0,10,20,.. degrees
$p->setWorldMatrix($matrix); # use this world matrix
my $c = TQt::Color;
$c->setHsv($i*10, 255, 255); # rainbow effect
$p->setBrush($c); # solid fill with color $c
$p->drawRect(70, -10, 80, 10); # draw the rectangle
my $n = sprintf "H=%d", $i*10;
$p->drawText(80+70+5, 0, $n); # draw the hue number
}
}
#
# This function draws a few lines of text using different fonts.
#
sub drawFonts {
my $p = shift;
my @fonts = qw(Helvetica Courier Times);
my @sizes = (10, 12, 18, 24, 36);
my $y = 0;
for my $f (@fonts) {
for my $s (@sizes) {
my $font = TQt::Font($f, $s);
$p->setFont($font);
my $fm = $p->fontMetrics;
$y += $fm->ascent;
$p->drawText(10, $y, "Quartz Glyph Job Vex'd Cwm Finks");
$y += $fm->descent;
}
}
}
#
# This function draws some shapes
#
sub drawShapes {
my $p = shift;
my $b1 = TQt::Brush(&blue);
my $b2 = TQt::Brush(&green, &Dense6Pattern); # green 12% fill
my $b3 = TQt::Brush(&NoBrush); # void brush
my $b4 = TQt::Brush(&CrossPattern); # black cross pattern
$p->setPen(&red);
$p->setBrush($b1);
$p->drawRect(10, 10, 200, 100);
$p->setBrush($b2);
$p->drawRoundRect(10, 150, 200, 100, 20, 20);
$p->setBrush($b3);
$p->drawEllipse(250, 10, 200, 100);
$p->setBrush($b4);
$p->drawPie(250, 150, 200, 100, 45*16, 90*16);
}
our @drawFunctions = (
# title presented to user, reference to the function
{ name => "Draw color wheel", f => \&drawColorWheel },
{ name => "Draw fonts" , f => \&drawFonts },
{ name => "Draw shapes" , f => \&drawShapes },
);
#
# Construct the DrawView with buttons.
#
sub NEW {
shift->SUPER::NEW(@_);
setCaption("PerlTQt Draw Demo Application");
setBackgroundColor(&white);
# Create a button group to contain all buttons
bgroup = TQt::ButtonGroup(this);
bgroup->resize(200, 200);
this->connect(bgroup, TQT_SIGNAL('clicked(int)'), TQT_SLOT('updateIt(int)'));
# Calculate the size for the radio buttons
my $maxwidth = 80;
my $maxheight = 10;
my $fm = bgroup->fontMetrics;
for my $i (0 .. $#drawFunctions) {
my $n = $drawFunctions[$i]{name};
my $w = $fm->width($n);
$maxwidth = max($w, $maxwidth);
}
$maxwidth += 30;
for my $i (0 .. $#drawFunctions) {
my $n = $drawFunctions[$i]{name};
my $rb = TQt::RadioButton($n, bgroup);
$rb->setGeometry(10, $i*30+10, $maxwidth, 30);
$maxheight += 30;
$rb->setChecked(1) unless $i;
$i++;
}
$maxheight += 10;
drawindex = 0;
maxindex = scalar @drawFunctions;
$maxwidth += 20;
bgroup->resize($maxwidth, $maxheight);
printer = TQt::Printer;
_print = TQt::PushButton("Print...", bgroup);
_print->resize(80, 30);
_print->move($maxwidth/2 - _print->width/2, maxindex*30+20);
this->connect(_print, TQT_SIGNAL('clicked()'), TQT_SLOT('printIt()'));
bgroup->resize($maxwidth, _print->y+_print->height+10);
resize(640,300);
}
sub updateIt {
my $index = shift;
if($index < maxindex) {
drawindex = $index;
update();
}
}
sub drawIt {
my $p = shift;
$drawFunctions[drawindex]{f}->($p);
}
sub printIt {
if(printer->setup(this)) {
my $paint = TQt::Painter(printer);
drawIt($paint);
}
}
sub paintEvent {
my $paint = TQt::Painter(this);
drawIt($paint);
}
sub resizeEvent {
bgroup->move(int(width() - bgroup->width), int(0));
}
package main;
use TQt;
use DrawView;
my $app = TQt::Application(\@ARGV);
my $draw = DrawView;
$app->setMainWidget($draw);
$draw->setCaption("PerlTQt Example - Drawdemo");
$draw->show;
exit $app->exec;
|
