release 1.14pre0

[descalc.git] / 03_disp_slang.pm

diff --git a/03_disp_slang.pm b/03_disp_slang.pm
new file mode 100644 (file)
index 0000000..6d8c62d
--- /dev/null
+++ b/03_disp_slang.pm
@@ -0,0 +1,118 @@
+# s-lang output for DCT, by Shiar
+
+# 1.13.0 200411042100 - menu i/o functions
+#                     - refresh hook renamed to showall
+# 1.12.0 200411032145 - define main loop
+#                     - use slang key reading functions
+# 1.11.0 200410291300 - basic output using Term::Slang (ported from Curses)
+
+use strict;
+use warnings;
+
+use Term::Slang qw(:all);
+
+use vars qw(%falias $path);
+require $path."termcommon.pm";
+
+push @{$hook{init}}, sub {
+       SLtt_get_terminfo and exit;
+       SLang_init_tty(-1, 0, 1);
+       SLsmg_init_smg;
+       SLtt_set_color(1, 0, 'black', 'lightgray');
+       
+       END { SLsmg_reset_smg; SLang_reset_tty; } # shutdown display system
+
+       # where are $SLtt_Screen_Rows and $SLtt_Screen_Cols?
+       ($set{height}, $set{width}) = SLtt_get_screen_size;
+       $set{height} -= 3;
+       $set{menushow} = int($set{width}/(4+$set{width}/20))+1;  # menu items to show simultaneously
+}; # init
+
+push @{$hook{showerror}}, sub {
+       my $error = shift;
+       SLsmg_draw_box(0, 0, 3, length($error)+4);
+       SLsmg_gotorc(1, 1);
+       SLsmg_write_string(" $error ");
+       SLsmg_refresh;
+
+       SLang_getkey;  # wait for confirm
+       SLang_getkey while SLang_input_pending(0)==1; # clear key buffer
+}; # showerror
+
+push @{$hook{showstack}}, sub {
+       for (0..@stack-1) {
+               SLsmg_gotorc($set{height}-$_, 1);
+               SLsmg_write_string("$_: ".showval($stack[$_], $set{base}));  # prompt
+               SLsmg_erase_eol;
+       } # show stack
+       SLsmg_gotorc($set{height}-@stack, 1);
+       SLsmg_erase_eol;
+}; # showstack
+
+push @{$hook{showmenu}}, sub {
+       SLsmg_gotorc($set{height}+2, 1);
+       SLsmg_erase_eol;
+       my $nr = -1;
+       for (grep exists $menu[0][$_], $menu[0][0]+1..$menu[0][0]+$set{menushow}) {
+               $nr++;
+               next unless defined $menu[0][$_];
+               my $sub = (my $s = $menu[0][$_]) =~ s/>[\w ]+$//;
+               SLsmg_gotorc($set{height}+2, $set{width}/$set{menushow}*$nr);
+               SLsmg_write_string($_);
+               SLsmg_reverse_video; # reverse
+               SLsmg_write_string($s);
+               SLsmg_normal_video;
+               SLsmg_write_string('>') if $sub;  # indicate submenu
+       } # display menu txts
+}; # showmenu
+
+$action{more} = [-1, sub {
+       $menu[0][0] += $set{menushow};
+       $menu[0][0] = 0 if $menu[0][0] > @{$menu[0]};
+       $_->() for @{$hook{showmenu}};
+}]; # tab
+
+unshift @{$hook{precmd}}, sub {
+       exists $falias{$_} or return;  # handle function key
+       if ($falias{$_}==0) {
+               shift @menu if @menu>1;  # remove current submenu
+               redraw(menu=>1);
+               return 1;
+       } # escape (go to parent)
+       $_ = $menu[0][$falias{$_}] and return;  # execute found menu item instead
+       error("no such menu entry");
+       return 1;
+}; # precmd
+
+push @{$hook{showall}}, sub {
+       SLsmg_cls;
+       SLsmg_gotorc($set{height}+1, 0);
+       SLsmg_write_string("> ");  # prompt
+}; # showall
+
+push @{$hook{showentry}}, sub {
+       SLsmg_gotorc($set{height}+1, 2);
+       SLsmg_write_string($_[0]);
+       SLsmg_erase_eol;
+       SLsmg_refresh;
+}; # showentry
+
+$hook{main} = sub {
+       while (1) {
+               draw();
+
+               my $key = chr SLang_getkey;  # wait for user input
+               if ($key eq chr 27) {
+                       $key .= chr SLang_getkey while SLang_input_pending(0)==1;  # read additional keys
+               } # escape sequence
+#              error(join " ", map ord, split //, $key); #debug
+               onkey($key);
+       } # input loop
+}; # main
+
+return {
+       author  => "Shiar",
+       title   => "slang output",
+       version => "1.13",
+};
+