Commit | Line | Data |
---|---|---|
86530b38 AT |
1 | # hscale.pl |
2 | ||
3 | use subs qw /hscale_width/; | |
4 | use vars qw/$TOP/; | |
5 | ||
6 | sub hscale { | |
7 | ||
8 | # Create a top-level window that displays a horizontal scale. | |
9 | ||
10 | my($demo) = @_; | |
11 | $TOP = $MW->WidgetDemo( | |
12 | -name => $demo, | |
13 | -text => 'An arrow and a horizontal 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 => 'Horizontal Scale Demonstration', | |
15 | -iconname => 'hscale', | |
16 | ); | |
17 | ||
18 | my $frame = $TOP->Frame(-borderwidth => 10)->pack(qw/-side top -fill x/); | |
19 | ||
20 | my $canvas = $frame->Canvas( | |
21 | qw/width 50 -height 50 -bd 0 -highlightthickness 0/); | |
22 | $canvas->create(qw/polygon 0 0 1 1 2 2 -fill DeepSkyBlue3 -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 horizontal -length 284 -from 0 | |
26 | -to 250 -tickinterval 50 -command/ => [\&hscale_width, $canvas]); | |
27 | $scale->set(75); | |
28 | ||
29 | $canvas->pack(qw/-side top -expand yes -anchor w -fill x/); | |
30 | $scale->pack(qw/-side bottom -expand yes -anchor w/); | |
31 | ||
32 | } # end hscale | |
33 | ||
34 | sub hscale_width { | |
35 | ||
36 | my($w, $width) = @_; | |
37 | ||
38 | $width += 21; | |
39 | my $x2 = $width - 30; | |
40 | $x2 = 21 if $x2 < 21; | |
41 | $w->coords('poly', 20, 15, 20, 35, $x2, 35, $x2, 45, $width, 25, $x2, 5, | |
42 | $x2, 15, 20, 15); | |
43 | $w->coords('line', 20, 15, 20, 35, $x2, 35, $x2, 45, $width, 25, $x2, 5, | |
44 | $x2, 15, 20, 15); | |
45 | ||
46 | } # end hscale_width | |
47 | ||
48 | 1; |