diff options
Diffstat (limited to 'Master/tlpkg/tlperl/lib/Tk/demos/widget_lib/items.pl')
-rw-r--r-- | Master/tlpkg/tlperl/lib/Tk/demos/widget_lib/items.pl | 358 |
1 files changed, 358 insertions, 0 deletions
diff --git a/Master/tlpkg/tlperl/lib/Tk/demos/widget_lib/items.pl b/Master/tlpkg/tlperl/lib/Tk/demos/widget_lib/items.pl new file mode 100644 index 00000000000..c720821babb --- /dev/null +++ b/Master/tlpkg/tlperl/lib/Tk/demos/widget_lib/items.pl @@ -0,0 +1,358 @@ +# items.pl + +use subs qw/items_button_press items_drag items_enter items_leave items_mark + items_start_drag items_stroke items_under_area/; +use vars qw/$TOP/; + +sub items { + + # Create a top-level window containing a canvas that displays the various + # item types and allows them to be selected and moved. + + my($demo) = @_; + $TOP = $MW->WidgetDemo( + -name => $demo, + -text => ["This window contains a canvas widget with examples of the various kinds of items supported by canvases. The following operations are supported:\n Button-1 drag:\tmoves item under pointer.\n Button-2 drag:\trepositions view.\n Button-3 drag:\tstrokes out area.\n Ctrl+f:\t\tdisplays items under area.", qw/-wraplength 5i/], + -title => 'Canvas Item Demonstration', + -iconname => 'items', + ); + + my $c = $TOP->Scrolled(qw/Canvas -width 15c -height 10c -relief sunken + -borderwidth 2 -scrollbars se -scrollregion/ => + [qw/0c 0c 30c 24c/]); + $c->pack(qw/-expand yes -fill both/); + + my %iinfo = (); # item information hash + $iinfo{areaX1} = 0; + $iinfo{areaY1} = 0; + $iinfo{areaX2} = 0; + $iinfo{areaY2} = 0; + $iinfo{restore_cmd} = ''; + + + if ($Tk::VERSION cmp '800.015') { + # Display a 3x3 rectangular grid (800.016 or greater). + $c->createGrid(qw/0c 0c 10c 8c -width 2 -lines 1/); + $c->createGrid(qw/0c 0c 5c 4c -lines 1 -dash ./); + $c->createGrid(qw/0c 0c 10m 8m -width 1/); + } else { + # Display a 3x3 rectangular grid. + $c->createRectangle(qw/ 0c 0c 30c 24c -width 2/); + $c->createLine (qw/ 0c 8c 30c 8c -width 2/); + $c->createLine (qw/ 0c 16c 30c 16c -width 2/); + $c->createLine (qw/10c 0c 10c 24c -width 2/); + $c->createLine (qw/20c 0c 20c 24c -width 2/); + } + + my $font1 = '-*-Helvetica-Medium-R-Normal--*-120-*-*-*-*-*-*'; + my $font2 = '-*-Helvetica-Bold-R-Normal--*-240-*-*-*-*-*-*'; + my($blue, $red, $bisque, $green); + if ($TOP->depth > 1) { + $blue = 'DeepSkyBlue3'; + $red = 'red'; + $bisque = 'bisque3'; + $green = 'SeaGreen3'; + } else { + $blue = 'black'; + $red = 'black'; + $bisque = 'black'; + $green = 'black'; + } + + # Set up demos within each of the areas of the grid. + + $c->createText(qw/5c .2c -text Lines -anchor n/); + $c->createLine(qw/1c 1c 3c 1c 1c 4c 3c 4c -width 2m/, -fill => $blue, + qw/-cap butt -join miter -tags item/); + $c->createLine(qw/4.67c 1c 4.67c 4c -arrow last -activedash - -tags item/); + $c->createLine(qw/6.33c 1c 6.33c 4c -arrow both -activedash . -tags item/); + $c->createLine(qw/5c 6c 9c 6c 9c 1c 8c 1c 8c 4.8c 8.8c 4.8c 8.8c 1.2c + 8.2c 1.2c 8.2c 4.6c 8.6c 4.6c 8.6c 1.4c 8.4c 1.4c + 8.4c 4.4c -width 3 -tags item -fill/ => $red); + $c->createLine(qw/1c 5c 7c 5c 7c 7c 9c 7c -width .5c/, + -stipple => '@'.Tk->findINC('demos/images/grey.25'), + qw/-arrow both -tags item -arrowshape/ => [15, 15, 7]); + $c->createLine(qw/1c 7c 1.75c 5.8c 2.5c 7c 3.25c 5.8c 4c 7c -width .5c + -cap round -join round -tags item/); + + $c->createText(qw/15c .2c -anchor n -text/ => 'Curves (smoothed lines)'); + $c->createLine(qw/11c 4c 11.5c 1c 13.5c 1c 14c 4c -smooth on/, + -fill =>$blue, qw/-tags item/); + $c->createLine(qw/15.5c 1c 19.5c 1.5c 15.5c 4.5c 19.5c 4c -smooth on + -arrow both -width 3 -tags item/); + $c->createLine(qw/12c 6c 13.5c 4.5c 16.5c 7.5c 18c 6c 16.5c 4.5c 13.5c + 7.5c 12c 6c -smooth on -width 3m -cap round -tags item/, + -stipple => '@'.Tk->findINC('demos/images/grey.25'), + -fill => $red); + + $c->createText(qw/25c .2c -text Polygons -anchor n/); + $c->createPolygon(qw/21c 1.0c 22.5c 1.75c 24c 1.0c 23.25c 2.5c 24c 4.0c + 22.5c 3.25c 21c 4.0c 21.75c 2.5c -tags item/, + -fill => $green); + $c->createPolygon(qw/25c 4c 25c 4c 25c 1c 26c 1c 27c 4c 28c 1c 29c 1c + 29c 4c 29c 4c -smooth on -tags item/, -fill => $red); + $c->createPolygon(qw/22c 4.5c 25c 4.5c 25c 6.75c 28c 6.75c 28c 5.25c 24c + 5.25c 24c 6.0c 26c 6c 26c 7.5c 22c 7.5c -tags item/, + -stipple => '@'.Tk->findINC('demos/images/grey.25')); + + $c->createText(qw/5c 8.2c -text Rectangles -anchor n/); + $c->createRectangle(qw/1c 9.5c 4c 12.5c/, -outline => $red, + qw/-width 3m -tags item/); + $c->createRectangle(qw/0.5c 13.5c 4.5c 15.5c/, -fill => $green, + qw/-tags item/); + $c->createRectangle(qw/6c 10c 9c 15c -tags item/, -outline => undef, + -stipple => '@'.Tk->findINC('demos/images/grey.25'), + -fill => $blue); + + $c->createText(qw/15c 8.2c -text Ovals -anchor n/); + $c->createOval(qw/11c 9.5c 14c 12.5c/, -outline => $red, + qw/-width 3m -tags item/); + $c->createOval(qw/10.5c 13.5c 14.5c 15.5c/, -fill => $green, + qw/-tags item/); + $c->createOval(qw/16c 10c 19c 15c -tags item/, -outline => undef, + -stipple => '@'.Tk->findINC('demos/images/grey.25'), + -fill => $blue); + + $c->createText(qw/25c 8.2c -text Text -anchor n/); + $c->createRectangle(qw/22.4c 8.9c 22.6c 9.1c/); + $c->createText(qw/22.5c 9c -anchor n -width 4c/, -font => $font1, + -text => 'A short string of text, word-wrapped, justified left, and anchored north (at the top). The rectangles show the anchor points for each piece of text.', qw/-tags item/); + $c->createRectangle(qw/25.4c 10.9c 25.6c 11.1c/); + $c->createText(qw/25.5c 11c -anchor w/, -font => $font1, -fill => $blue, + -text => "Several lines,\n each centered\n" . + "individually,\nand all anchored\nat the left edge.", + qw/-justify center -tags item/); + $c->createRectangle(qw/24.9c 13.9c 25.1c 14.1c/); + $c->createText(qw/25c 14c -anchor c/, -font => $font2, -fill => $red, + -stipple => 'gray50', + -text => 'Stippled characters', qw/-tags item/); + + $c->createText(qw/5c 16.2c -text Arcs -anchor n/); + $c->createArc(qw/0.5c 17c 7c 20c/, -fill => $green, qw/-outline black/, + -stipple => '@'.Tk->findINC('demos/images/grey.25'), + qw/-start 45 -extent 270 -style pieslice -tags item/); + $c->createArc(qw/6.5c 17c 9.5c 20c -width 4m -style arc/, -fill => $blue, + qw/-start -135 -extent 270 -tags item/); + $c->createArc(qw/0.5c 20c 9.5c 24c -width 4m -style pieslice/, + -fill => undef, -outline => $red, + qw/-start 225 -extent -90 -tags item/); + $c->createArc(qw/5.5c 20.5c 9.5c 23.5c -width 4m -style chord/, + -fill => $blue, -outline => undef, + qw/-start 45 -extent 270 -tags item/); + + $c->createText(qw/15c 16.2c -text Bitmaps -anchor n/); + $c->createBitmap(qw/13c 20c -bitmap/ => + '@'.Tk->findINC('demos/images/face'), qw/-tags item/); + $c->createBitmap(qw/17c 18.5c/, + -bitmap => '@'.Tk->findINC('demos/images/noletters'), + qw/-tags item/); + $c->createBitmap(qw/17c 21.5c/, + -bitmap => '@'.Tk->findINC('demos/images/letters'), + qw/-tags item/); + + $c->createText(qw/25c 16.2c -text Windows -anchor n/); + my $c_button = $c->Button(-text => 'Press Me', + -command => [\&items_button_press, $c, $red], + ); + $c->createWindow(qw/21c 18c/, -window => $c_button, + qw/-anchor nw -tags item/); + my $c_entry = $c->Entry(-width => '20', -relief => 'sunken', + -validate => 'all', + -validatecommand => sub {$n++ ? 1 : 0}, + -invalidcommand => sub {$TOP->bell}); + $c_entry->insert('end' => 'Edit this text'); + $c->createWindow(qw/21c 21c/, -window => $c_entry, + qw/-anchor nw -tags item/); + my $c_scale = $c->Scale(qw/-from 0 -to 100 -length 6c -sliderlength .4c + -width .5c -tickinterval 0/); + $c->createWindow(qw/28.5c 17.5c/, -window => $c_scale, + qw/-anchor n -tags item/); + $c->createText(qw/21c 17.9c -text Button: -anchor sw/); + $c->createText(qw/21c 20.9c -text Entry: -anchor sw/); + $c->createText(qw/28.5c 17.4c -text Scale: -anchor s/); + + # Set up event bindings for canvas. + + $c->bind('item', '<Any-Enter>' => [\&items_enter, \%iinfo]); + $c->bind('item', '<Any-Leave>' => [\&items_leave, \%iinfo]); + + # Get real canvas widget reference to apply bind() commands to: the + # Canvas widget is a subwidget of the Scrolled composite widget. To + # reference the X event structure, either use the XEvent() method or + # read the specially localized variable $Tk::event. We'll use XEvent + # first, and the variable from then on. + + $c->CanvasBind('<<Copy>>',sub { print "Do Copy\n" }); + + $c->CanvasBind('<1>' => sub { + my($c) = @_; + my $e = $c->XEvent; + items_start_drag $c, $e->x, $e->y, \%iinfo; + }); + $c->CanvasBind('<B1-Motion>' => + sub {items_drag shift, $Tk::event->x, $Tk::event->y, \%iinfo}); + $c->CanvasBind('<2>' => + sub {shift->scan('mark', $Tk::event->x, $Tk::event->y)}); + $c->CanvasBind('<B2-Motion>' => + sub {shift->scan('dragto', $Tk::event->x, $Tk::event->y)}); + $c->CanvasBind('<3>' => + sub {items_mark shift, $Tk::event->x, $Tk::event->y, \%iinfo}); + $c->CanvasBind('<B3-Motion>' => + sub {items_stroke shift, $Tk::event->x, $Tk::event->y, \%iinfo}); + $c->CanvasBind('<Control-f>' => [sub { + my($c, $iinfo) = @_; + my $e = $c->XEvent; + items_under_area $c, $iinfo; + }, \%iinfo]); + $c->CanvasBind('<Any-Enter>' => sub {$_[0]->CanvasFocus}); + +} # end items + +# Utility procedures for highlighting the item under the pointer: + +sub items_button_press { + + # Procedure that's invoked when the button embedded in the canvas + # is invoked. + + my($w, $color) = @_; + + my $i = $w->createText(qw/25c 18.1c -anchor n/, -text => 'Ouch!!', + -fill => $color); + $w->after(500, sub { $w->delete($i) }); + +} # end items_button_press + +sub items_drag { + + my($c, $x, $y, $iinfo) = @_; + + $x = $c->canvasx($x); + $y = $c->canvasy($y); + $c->move('current', $x-$iinfo->{lastX}, $y-$iinfo->{lastY}); + $iinfo->{lastX} = $x; + $iinfo->{lastY} = $y; + +} # end items_drag + +sub items_enter { + + my($c, $iinfo) = @_; + + $iinfo->{restore_cmd} = ''; + + if ($TOP->depth == 1) { + $iinfo->{restore_cmd} = ''; + return; + } + my $type = $c->type('current'); + if ($type eq 'window') { + $iinfo->{restore_cmd} = ''; + return; + } + + if ($type eq 'bitmap') { + my $bg = ($c->itemconfigure(qw/current -background/))[4]; + if (defined $bg) { + $iinfo->{restore_cmd} = "\$c->itemconfigure('current', + -background => '$bg');"; + } else { + $iinfo->{restore_cmd} = "\$c->itemconfigure('current', + -background => undef);"; + } + $c->itemconfigure(qw/current -background SteelBlue2/); + return; + } + my $fill = ($c->itemconfigure(qw/current -fill/))[4]; + my $stipple = ($c->itemconfigure(qw/current -stipple/))[4]; + if (defined $stipple) { + $iinfo->{restore_cmd} = "\$c->itemconfigure('current', + -stipple => '$stipple')"; + $c->itemconfigure(qw/current -stipple /,''); + } elsif (($type eq 'rectangle' or $type eq 'oval' or $type eq 'arc') + and not defined $fill) { + my $outline = ($c->itemconfigure(qw/current -outline/))[4]; + $iinfo->{restore_cmd} = "\$c->itemconfigure('current', + -outline => '$outline')"; + $c->itemconfigure(qw/current -outline SteelBlue2/); + } else { + $iinfo->{restore_cmd} = "\$c->itemconfigure('current', + -fill => '$fill')"; + $c->itemconfigure(qw/current -fill SteelBlue2/); + } + +} # end items_enter + +sub items_leave { + + my($c, $iinfo) = @_; + + eval $iinfo->{restore_cmd}; + +} # end items_leave + +sub items_mark { + + my($c, $x, $y, $iinfo) = @_; + + $iinfo->{areaX1} = $c->canvasx($x); + $iinfo->{areaY1} = $c->canvasy($y); + $c->delete('area'); + +} # end items_mark + +sub items_start_drag { + + my($c, $x, $y, $iinfo) = @_; + + $iinfo->{lastX} = $c->canvasx($x); + $iinfo->{lastY} = $c->canvasy($y); + +} # end items_start_drag + +sub items_stroke { + + my($c, $x, $y, $iinfo) = @_; + + $x = $c->canvasx($x); + $y = $c->canvasy($y); + if (($iinfo->{areaX1} != $x) and ($iinfo->{areaY1} != $y)) { + $c->delete('area'); + $c->addtag('area', 'withtag', $c->create('rectangle', + $iinfo->{areaX1}, $iinfo->{areaY1}, $x, $y, -outline => 'black')); + $iinfo->{areaX2} = $x; + $iinfo->{areaY2} = $y; + } + +} # end items_stroke + +sub items_under_area { + + my($c, $iinfo) = @_; + + my $area = $c->find('withtag', 'area'); + my @items = (); + my $i; + foreach $i ($c->find('enclosed', $iinfo->{areaX1}, + $iinfo->{areaY1}, $iinfo->{areaX2}, $iinfo->{areaY2})) { + my @tags = $c->gettags($i); + if (defined($tags[0]) and grep $_ eq 'item', @tags) { + push @items, $i; + } + } + @items = 'None' unless @items; + print STDOUT 'Items enclosed by area: ', join(' ', @items), ".\n"; + @items = (); + foreach $i ($c->find('overlapping', $iinfo->{areaX1}, $iinfo->{areaY1}, + $iinfo->{areaX2}, $iinfo->{areaY2})) { + my @tags = $c->gettags($i); + if (defined($tags[0]) and grep $_ eq 'item', @tags) { + push @items, $i; + } + } + @items = 'None' unless @items; + print STDOUT 'Items overlapping area: ', join(' ', @items), ".\n"; + +} # end items_under_area + +1; |