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-rw-r--r--Master/tlpkg/tlperl/lib/Tk/demos/widget_lib/hscale.pl48
1 files changed, 48 insertions, 0 deletions
diff --git a/Master/tlpkg/tlperl/lib/Tk/demos/widget_lib/hscale.pl b/Master/tlpkg/tlperl/lib/Tk/demos/widget_lib/hscale.pl
new file mode 100644
index 00000000000..dcfd1437139
--- /dev/null
+++ b/Master/tlpkg/tlperl/lib/Tk/demos/widget_lib/hscale.pl
@@ -0,0 +1,48 @@
+# hscale.pl
+
+use subs qw /hscale_width/;
+use vars qw/$TOP/;
+
+sub hscale {
+
+ # Create a top-level window that displays a horizontal scale.
+
+ my($demo) = @_;
+ $TOP = $MW->WidgetDemo(
+ -name => $demo,
+ -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.',
+ -title => 'Horizontal Scale Demonstration',
+ -iconname => 'hscale',
+ );
+
+ my $frame = $TOP->Frame(-borderwidth => 10)->pack(qw/-side top -fill x/);
+
+ my $canvas = $frame->Canvas(
+ qw/width 50 -height 50 -bd 0 -highlightthickness 0/);
+ $canvas->createPolygon(qw/0 0 1 1 2 2 -fill DeepSkyBlue3 -tags poly/);
+ $canvas->createLine (qw/0 0 1 1 2 2 0 0 -fill black -tags line/);
+
+ my $scale = $frame->Scale(qw/-orient horizontal -length 284 -from 0
+ -to 250 -tickinterval 50 -command/ => [\&hscale_width, $canvas]);
+ $scale->set(75);
+
+ $canvas->pack(qw/-side top -expand yes -anchor w -fill x/);
+ $scale->pack(qw/-side bottom -expand yes -anchor w/);
+
+} # end hscale
+
+sub hscale_width {
+
+ my($w, $width) = @_;
+
+ $width += 21;
+ my $x2 = $width - 30;
+ $x2 = 21 if $x2 < 21;
+ $w->coords('poly', 20, 15, 20, 35, $x2, 35, $x2, 45, $width, 25, $x2, 5,
+ $x2, 15, 20, 15);
+ $w->coords('line', 20, 15, 20, 35, $x2, 35, $x2, 45, $width, 25, $x2, 5,
+ $x2, 15, 20, 15);
+
+} # end hscale_width
+
+1;