Commit | Line | Data |
---|---|---|
86530b38 AT |
1 | # vscale.pl |
2 | ||
3 | use subs qw/vscale_height/; | |
4 | use vars qw/$TOP/; | |
5 | ||
6 | sub vscale { | |
7 | ||
8 | # Create a top-level window that displays a vertical scale. | |
9 | ||
10 | my($demo) = @_; | |
11 | $TOP = $MW->WidgetDemo( | |
12 | -name => $demo, | |
13 | -text => 'An arrow and a vertical scale are displayed below. If you click or drag mouse button 1 in the scale, you can change the size of the arrow.', | |
14 | -title => 'Vertical Scale Demonstration', | |
15 | -iconname => 'vscale', | |
16 | ); | |
17 | ||
18 | my $frame = $TOP->Frame(-borderwidth => 10)->pack; | |
19 | ||
20 | my $canvas = $frame->Canvas( | |
21 | qw/-width 50 -height 50 -borderwidth 0 -highlightthickness 0/); | |
22 | $canvas->create(qw/polygon 0 0 1 1 2 2 -fill SeaGreen3 -tags poly/); | |
23 | $canvas->create(qw/line 0 0 1 1 2 2 0 0 -fill black -tags line/); | |
24 | ||
25 | my $scale = $frame->Scale(qw/-orient vertical -length 284 -from 0 | |
26 | -to 250 -tickinterval 50 -command/ => [\&vscale_height, $canvas]); | |
27 | $scale->set(75); | |
28 | ||
29 | $scale->pack(qw/-side left -anchor ne/); | |
30 | $canvas->pack(qw/-side left -anchor nw -fill y/) | |
31 | ||
32 | } # end vscale | |
33 | ||
34 | sub vscale_height { | |
35 | ||
36 | my($w, $height) = @_; | |
37 | ||
38 | $height += 21; | |
39 | my $y2 = $height - 30; | |
40 | $y2 = 21 if $y2 < 21; | |
41 | $w->coords('poly', 15, 20, 35, 20, 35, $y2, 45, $y2, 25, $height, 5, $y2, | |
42 | 15, $y2, 15, 20); | |
43 | $w->coords('line', 15, 20, 35, 20, 35, $y2, 45, $y2, 25, $height, 5, $y2, | |
44 | 15, $y2, 15, 20); | |
45 | ||
46 | } # end vscale_height | |
47 | ||
48 | 1; |