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-rw-r--r--Master/tlpkg/tlperl/lib/Tk/demos/widget_lib/vscale.pl48
1 files changed, 48 insertions, 0 deletions
diff --git a/Master/tlpkg/tlperl/lib/Tk/demos/widget_lib/vscale.pl b/Master/tlpkg/tlperl/lib/Tk/demos/widget_lib/vscale.pl
new file mode 100644
index 00000000000..1f7d076e93d
--- /dev/null
+++ b/Master/tlpkg/tlperl/lib/Tk/demos/widget_lib/vscale.pl
@@ -0,0 +1,48 @@
+# vscale.pl
+
+use subs qw/vscale_height/;
+use vars qw/$TOP/;
+
+sub vscale {
+
+ # Create a top-level window that displays a vertical scale.
+
+ my($demo) = @_;
+ $TOP = $MW->WidgetDemo(
+ -name => $demo,
+ -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.',
+ -title => 'Vertical Scale Demonstration',
+ -iconname => 'vscale',
+ );
+
+ my $frame = $TOP->Frame(-borderwidth => 10)->pack;
+
+ my $canvas = $frame->Canvas(
+ qw/-width 50 -height 50 -borderwidth 0 -highlightthickness 0/);
+ $canvas->createPolygon(qw/0 0 1 1 2 2 -fill SeaGreen3 -tags poly/);
+ $canvas->createLine(qw/0 0 1 1 2 2 0 0 -fill black -tags line/);
+
+ my $scale = $frame->Scale(qw/-orient vertical -length 284 -from 0
+ -to 250 -tickinterval 50 -command/ => [\&vscale_height, $canvas]);
+ $scale->set(75);
+
+ $scale->pack(qw/-side left -anchor ne/);
+ $canvas->pack(qw/-side left -anchor nw -fill y/)
+
+} # end vscale
+
+sub vscale_height {
+
+ my($w, $height) = @_;
+
+ $height += 21;
+ my $y2 = $height - 30;
+ $y2 = 21 if $y2 < 21;
+ $w->coords('poly', 15, 20, 35, 20, 35, $y2, 45, $y2, 25, $height, 5, $y2,
+ 15, $y2, 15, 20);
+ $w->coords('line', 15, 20, 35, 20, 35, $y2, 45, $y2, 25, $height, 5, $y2,
+ 15, $y2, 15, 20);
+
+} # end vscale_height
+
+1;