| 1 | |
| 2 | |
| 3 | sub mkHScale { |
| 4 | |
| 5 | # Create a top-level window that displays a horizontal scale. |
| 6 | |
| 7 | $mkHScale->destroy if Exists($mkHScale); |
| 8 | $mkHScale = $top->Toplevel(); |
| 9 | my $w = $mkHScale; |
| 10 | dpos $w; |
| 11 | $w->title('Horizontal Scale Demonstration'); |
| 12 | $w->iconname('Scale'); |
| 13 | my $w_msg = $w->Label(-font => '-Adobe-times-medium-r-normal--*-180-*-*-*-*-*-*', -wraplength => '3i', |
| 14 | -justify => 'left', -text => 'An arrow and a horizontal scale are displayed below. If you click ' . |
| 15 | 'or drag mouse button 1 in the scale, you can change the width 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 => [sub{shift->destroy}, $w]); |
| 19 | $w_msg->pack(-side => 'top', -fill => 'x'); |
| 20 | $w_frame->pack(-side => 'top', -fill => 'x'); |
| 21 | $w_ok->pack(-side => 'top'); |
| 22 | |
| 23 | $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 DeepSkyBlue3 -tags poly)); |
| 25 | $w_frame_canvas->create(qw(line 0 0 1 1 2 2 0 0 -fill black -tags line)); |
| 26 | $w_frame_scale = $w_frame->Scale(qw(-orient horizontal -length 284 -from 0 -to 250 -tickinterval 50), |
| 27 | -command => [\&setWidth, $w_frame_canvas]); |
| 28 | $w_frame_canvas->pack(qw(-side top -expand yes -anchor s -fill x)); |
| 29 | $w_frame_scale->pack(qw(-side bottom -expand yes -anchor n)); |
| 30 | $w_frame_scale->set(75); |
| 31 | |
| 32 | } # end mkHScale |
| 33 | |
| 34 | |
| 35 | sub setWidth { |
| 36 | |
| 37 | my($w, $width) = @_; |
| 38 | |
| 39 | $width += 21; |
| 40 | my $x2 = $width - 30; |
| 41 | $x2 = 21 if $x2 < 21; |
| 42 | $w->coords('poly', 20, 15, 20, 35, $x2, 35, $x2, 45, $width, 25, $x2, 5, $x2, 15, 20, 15); |
| 43 | $w->coords('line', 20, 15, 20, 35, $x2, 35, $x2, 45, $width, 25, $x2, 5, $x2, 15, 20, 15); |
| 44 | |
| 45 | } # end setWidth |
| 46 | |
| 47 | |
| 48 | 1; |