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- package Tk::DragDrop::Rect;
- use strict;
- use Carp;
-
- # Proxy class which represents sites to the dropping side
-
- use vars qw($VERSION);
- $VERSION = sprintf '4.%03d', q$Revision: #11 $ =~ /\D(\d+)\s*$/;
-
- # Some default methods when called site side
- # XIDs and viewable-ness from widget
-
- # XID of ancestor
- sub ancestor { ${shift->widget->toplevel->WindowId} }
-
- # XID of site window
- sub win { ${shift->widget->WindowId} }
-
- # Is site window mapped
- sub viewable { shift->widget->viewable }
-
- sub Over
- {
- my ($site,$X,$Y) = @_;
-
- my $x = $site->X;
- my $y = $site->Y;
- my $w = $site->width;
- my $h = $site->height;
- my $val = ($X >= $x && $X < ($x + $w) && $Y >= $y && $Y < ($y + $h));
-
- return 0 unless $val;
-
- my $widget = $site->widget;
-
- # Now XTranslateCoords from root window to site window's
- # ancestor. Ancestors final descendant should be the site window.
- # Like $win->containing but avoids a problem that dropper's "token"
- # window may be the toplevel (child of root) that contains X,Y
- # so if that is in another application ->containing does not
- # give us a window.
- my $id = $site->ancestor;
- while (1)
- {
- my $cid = $widget->PointToWindow($X,$Y,$id);
- last unless $cid;
- $id = $cid;
- }
- return ($id == $site->win);
- }
-
- sub FindSite
- {
- my ($class,$widget,$X,$Y) = @_;
- foreach my $site ($class->SiteList($widget))
- {
- return $site if ($site->viewable && $site->Over($X,$Y));
- }
- return undef;
- }
-
- sub NewDrag
- {
- my ($class,$widget) = @_;
- }
-
- sub Match
- {
- my ($site,$other) = @_;
- return 0 unless (defined $other);
- return 1 if ($site == $other);
- return 0 unless (ref($site) eq ref($other));
- for ("$site")
- {
- if (/ARRAY/)
- {
- my $i;
- return 0 unless (@$site == @$other);
- for ($i = 0; $i < @$site; $i++)
- {
- return 0 unless ($site->[$i] == $other->[$i]);
- }
- return 1;
- }
- elsif (/SCALAR/)
- {
- return $site == $other;
- }
- elsif (/HASH/)
- {
- my $key;
- foreach $key (keys %$site)
- {
- return 0 unless exists $other->{$key};
- return 0 unless ($other->{$key} eq $site->{$key});
- }
- foreach $key (keys %$other)
- {
- return 0 unless exists $site->{$key};
- return 0 unless ($other->{$key} eq $site->{$key});
- }
- return 1;
- }
- return 0;
- }
- return 0;
- }
-
-
- 1;
-