Commit | Line | Data |
---|---|---|
86530b38 AT |
1 | |
2 | ||
3 | sub mkVScale { | |
4 | ||
5 | # Create a top-level window that displays a vertical scale. | |
6 | ||
7 | $mkVScale->destroy if Exists($mkVScale); | |
8 | $mkVScale = $top->Toplevel(); | |
9 | my $w = $mkVScale; | |
10 | dpos $w; | |
11 | $w->title('Vertical Scale Demonstration'); | |
12 | $w->iconname('Scale'); | |
13 | my $w_msg = $w->Label(-font => '-Adobe-times-medium-r-normal--*-180*-*-*-*-*-*-*', -wraplength => '4i', | |
14 | -justify => 'left', -text => 'An arrow and a vertical scale are displayed below. If you click ' . | |
15 | 'or drag mouse button 1 in the scale, you can change the height of the arrow. Click the "OK" ' . | |
16 | 'button when you\'re finished.'); | |
17 | my $w_frame = $w->Frame(-borderwidth => 10); | |
18 | my $w_ok = $w->Button(-text => 'OK', -width => 8, -command => ['destroy', $w]); | |
19 | $w_msg->pack(); | |
20 | $w_frame->pack(); | |
21 | $w_ok->pack(); | |
22 | ||
23 | my $w_frame_canvas = $w_frame->Canvas(qw(-width 50 -height 50 -bd 0 -highlightthickness 0)); | |
24 | $w_frame_canvas->create(qw(polygon 0 0 1 1 2 2 -fill SeaGreen3 -tags poly)); | |
25 | $w_frame_canvas->create(qw(line 0 0 1 1 2 2 0 0 -fill black -tags line)); | |
26 | my $w_frame_scale = $w_frame->Scale(-orient => 'vertical', '-length' => 284, -from => 0, -to => 250, -tickinterval => 50, | |
27 | -command => [\&setHeight, $w_frame_canvas]); | |
28 | $w_frame_scale->pack(-side => 'left', -anchor => 'ne'); | |
29 | $w_frame_canvas->pack(-side => 'left', -anchor => 'nw', -fill => 'y'); | |
30 | $w_frame_scale->set(75); | |
31 | ||
32 | } # end mkVScale | |
33 | ||
34 | ||
35 | sub setHeight { | |
36 | ||
37 | my($w, $height) = @_; | |
38 | ||
39 | $height += 21; | |
40 | $y2 = $height - 30; | |
41 | $y2 = 21 if $y2 < 21; | |
42 | $w->coords('poly', 15, 20, 35, 20, 35, $y2, 45, $y2, 25, $height, 5, $y2, 15, $y2, 15, 20); | |
43 | $w->coords('line', 15, 20, 35, 20, 35, $y2, 45, $y2, 25, $height, 5, $y2, 15, $y2, 15, 20); | |
44 | ||
45 | } # end setHeight | |
46 | ||
47 | ||
48 | 1; |