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-rw-r--r--Perl/demos/Tk/demos/zinc_pm/SimpleRadarControls.pm231
1 files changed, 231 insertions, 0 deletions
diff --git a/Perl/demos/Tk/demos/zinc_pm/SimpleRadarControls.pm b/Perl/demos/Tk/demos/zinc_pm/SimpleRadarControls.pm
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index 0000000..30fffb4
--- /dev/null
+++ b/Perl/demos/Tk/demos/zinc_pm/SimpleRadarControls.pm
@@ -0,0 +1,231 @@
+# $Id$
+# This simple radar has been initially developped by P. Lecoanet <lecoanet@cena.fr>
+# It has been adapted by C. Mertz <mertz@cena.fr> for demo purpose.
+# Thanks to Dunnigan,Jack [Edm]" <Jack.Dunnigan@EC.gc.ca> for a bug correction.
+
+package SimpleRadarControls;
+
+$top = 1;
+
+sub new {
+ my $proto = shift;
+ my $type = ref($proto) || $proto;
+ my ($zinc) = @_;
+ my $self = {};
+
+ $self{'zinc'} = $zinc;
+ $self{'cur_x'} = 0;
+ $self{'cur_y'} = 0;
+ $self{'cur_angle'} = 0;
+ $self{'corner_x'} = 0;
+ $self{'corner_y'} = 0;
+
+ $self{'tlbbox'} = $zinc->add('group', $top,
+ -sensitive => 0, -visible => 0,
+ -tags => 'currentbbox');
+ $zinc->add('rectangle', $self{'tlbbox'}, [-3, -3, +3, +3]);
+ $self{'trbbox'} = $zinc->add('group', $top,
+ -sensitive => 0, -visible => 0,
+ -tags => 'currentbbox');
+ $zinc->add('rectangle', $self{'trbbox'}, [-3, -3, +3, +3]);
+ $self{'blbbox'} = $zinc->add('group', $top,
+ -sensitive => 0, -visible => 0,
+ -tags => 'currentbbox');
+ $zinc->add('rectangle', $self{'blbbox'}, [-3, -3, +3, +3]);
+ $self{'brbbox'} = $zinc->add('group', $top,
+ -sensitive => 0, -visible => 0,
+ -tags => 'currentbbox');
+ $zinc->add('rectangle', $self{'brbbox'}, [-3, -3, +3, +3]);
+ $zinc->add('rectangle', $top, [0, 0, 1, 1],
+ -linecolor => 'red', -tags => 'lasso',
+ -visible => 0, -sensitive => 0);
+
+ $zinc->Tk::bind('<Shift-ButtonPress-1>', [\&start_lasso, $self]);
+ $zinc->Tk::bind('<Shift-ButtonRelease-1>', [\&fin_lasso, $self]);
+
+ $zinc->Tk::bind('<ButtonPress-2>', sub { my $ev = $zinc->XEvent();
+ my @closest = $zinc->find('closest',
+ $ev->x, $ev->y);
+ print "at point=$closest[0]\n" });
+
+ $zinc->Tk::bind('<ButtonPress-3>', [\&press, $self, \&motion]);
+ $zinc->Tk::bind('<ButtonRelease-3>', [\&release, $self]);
+
+ $zinc->Tk::bind('<Shift-ButtonPress-3>', [\&press, $self, \&zoom]);
+ $zinc->Tk::bind('<Shift-ButtonRelease-3>', [\&release, $self]);
+
+ $zinc->Tk::bind('<Control-ButtonPress-3>', [\&press, $self, \&rotate]);
+ $zinc->Tk::bind('<Control-ButtonRelease-3>', [\&release, $self]);
+
+ $zinc->Tk::bind('current', '<Enter>', [\&showbox, $self]);
+ $zinc->Tk::bind('current', '<Leave>', [\&hidebox, $self]);
+
+ bless ($self, $type);
+ return $self;
+}
+
+#
+# Controls for the window transform.
+#
+sub press {
+ my ($zinc, $self, $action) = @_;
+ my $ev = $zinc->XEvent();
+ my $lx = $ev->x;
+ my $ly = $ev->y;
+
+ $self->{'cur_x'} = $lx;
+ $self->{'cur_y'} = $ly;
+ $self->{'cur_angle'} = atan2($ly, $lx);
+ $zinc->Tk::bind('<Motion>', [$action, $self]);
+}
+
+sub motion {
+ my ($zinc, $self) = @_;
+ my $ev = $zinc->XEvent();
+ my $lx = $ev->x;
+ my $ly = $ev->y;
+ my @it;
+ my @res;
+
+ @it = $zinc->find('withtag', 'controls');
+ if (scalar(@it) == 0) {
+ return;
+ }
+ @res = $zinc->transform($it[0], [$lx, $ly, $self->{'cur_x'}, $self->{'cur_y'}]);
+ $zinc->translate('controls', $res[0] - $res[2], $res[1] - $res[3]);
+ $self->{'cur_x'} = $lx;
+ $self->{'cur_y'} = $ly;
+}
+
+sub zoom {
+ my ($zinc, $self) = @_;
+ my $ev = $zinc->XEvent();
+ my $lx = $ev->x;
+ my $ly = $ev->y;
+ my $maxx;
+ my $maxy;
+ my $sx;
+ my $sy;
+
+ if ($lx > $self->{'cur_x'}) {
+ $maxx = $lx;
+ } else {
+ $maxx = $self->{'cur_x'};
+ }
+ if ($ly > $self->{'cur_y'}) {
+ $maxy = $ly
+ } else {
+ $maxy = $self->{'cur_y'};
+ }
+ #avoid illegal division by zero
+ return unless ($maxx && $maxy);
+
+ $sx = 1.0 + ($lx - $self->{'cur_x'})/$maxx;
+ $sy = 1.0 + ($ly - $self->{'cur_y'})/$maxy;
+ $self->{'cur_x'} = $lx if ($lx>0); # avoid ZnTransfoDecompose :singular matrix
+ $self->{'cur_y'} = $ly if ($ly>0); # error messages
+ $zinc->scale('controls', $sx, $sy);
+# $main::scale *= $sx;
+# main::update_transform($zinc);
+}
+
+sub rotate {
+ my ($zinc, $self) = @_;
+ my $ev = $zinc->XEvent();
+ my $lx = $ev->x;
+ my $ly = $ev->y;
+ my $langle;
+
+ $langle = atan2($ly, $lx);
+ $zinc->rotate('controls', -($langle - $self->{'cur_angle'}));
+ $self->{'cur_angle'} = $langle;
+}
+
+sub release {
+ my ($zinc, $self) = @_;
+ $zinc->Tk::bind('<Motion>', '');
+}
+
+sub start_lasso {
+ my ($zinc, $self) = @_;
+ my $ev = $zinc->XEvent();
+ my $lx = $ev->x;
+ my $ly = $ev->y;
+ my @coords;
+
+ $self->{'cur_x'} = $lx;
+ $self->{'cur_y'} = $ly;
+ $self->{'corner_x'} = $lx;
+ $self->{'corner_y'} = $ly;
+ @coords = $zinc->transform($top, [$lx, $ly]);
+ $zinc->coords('lasso', [$coords[0], $coords[1], $coords[0], $coords[1]]);
+ $zinc->itemconfigure('lasso', -visible => 1);
+ $zinc->raise('lasso');
+ $zinc->Tk::bind('<Motion>', [\&lasso, $self]);
+}
+
+sub lasso {
+ my ($zinc, $self) = @_;
+ my $ev = $zinc->XEvent();
+ my $lx = $ev->x;
+ my $ly = $ev->y;
+ my @coords;
+
+ $self->{'corner_x'} = $lx;
+ $self->{'corner_y'} = $ly;
+ @coords = $zinc->transform($top, [$self->{'cur_x'}, $self->{'cur_y'}, $lx, $ly]);
+ $zinc->coords('lasso', [$coords[0], $coords[1], $coords[2], $coords[3]]);
+}
+
+sub fin_lasso {
+ my ($zinc, $self) = @_;
+ my $enclosed;
+ my $overlapping;
+
+ $zinc->Tk::bind('<Motion>', '');
+ $zinc->itemconfigure('lasso', -visible => 0);
+ $enclosed = join(', ', $zinc->find('enclosed',
+ $self->{'cur_x'}, $self->{'cur_y'},
+ $self->{'corner_x'}, $self->{'corner_y'}));
+ $overlapping = join(', ', $zinc->find('overlapping',
+ $self->{'cur_x'}, $self->{'cur_y'},
+ $self->{'corner_x'}, $self->{'corner_y'}));
+ print "enclosed=$enclosed, overlapping=$overlapping\n";
+}
+
+sub showbox {
+ my ($zinc, $self) = @_;
+ my @coords;
+ my @it;
+
+ if (! $zinc->hastag('current', 'currentbbox')) {
+ @it = $zinc->find('withtag', 'current');
+ if (scalar(@it) == 0) {
+ return;
+ }
+ @coords = $zinc->transform($top, $zinc->bbox('current'));
+
+ $zinc->coords($self->{'tlbbox'}, [$coords[0], $coords[1]]);
+ $zinc->coords($self->{'trbbox'}, [$coords[2], $coords[1]]);
+ $zinc->coords($self->{'brbbox'}, [$coords[2], $coords[3]]);
+ $zinc->coords($self->{'blbbox'}, [$coords[0], $coords[3]]);
+ $zinc->itemconfigure('currentbbox', -visible => 1);
+ }
+}
+
+sub hidebox {
+ my ($zinc, $self) = @_;
+ my $ev = $zinc->XEvent();
+ my $lx = $ev->x;
+ my $ly = $ev->y;
+ my @next;
+
+ @next = $zinc->find('closest', $lx, $ly);
+ if ((scalar(@next) == 0) ||
+ ! $zinc->hastag($next[0], 'currentbbox') ||
+ $zinc->hastag('current', 'currentbbox')) {
+ $zinc->itemconfigure('currentbbox', -visible => 0);
+ }
+}
+
+
generated by cgit v1.1 at 2024-09-06 20:21:44 +0000