diff options
Diffstat (limited to 'sandbox/Controls.pm')
| -rw-r--r-- | sandbox/Controls.pm | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/sandbox/Controls.pm b/sandbox/Controls.pm new file mode 100644 index 0000000..b432129 --- /dev/null +++ b/sandbox/Controls.pm @@ -0,0 +1,191 @@ + +package controls; + +$cur_x = 0; +$cur_y = 0; +$cur_angle = 0; +$corner_x = 0; +$corner_y = 0; +$top = 1; + +sub new { + $tlbbox = $zinc->add('group', $top, + -sensitive => 0, -visible => 0, + -tags 'currentbbox'); + $zinc->add('rectangle', $tlbbox, [-3, -3, +3, +3]); + $trbbox = $zinc->add('group', $top, + -sensitive => 0, -visible => 0, + -tags => 'currentbbox'); + $zinc->add('rectangle', $trbbox, [-3, -3, +3, +3]); + $blbbox = $zinc->add('group', $top, + -sensitive => 0, -visible => 0, + -tags => 'currentbbox'); + $zinc->add('rectangle', $blbbox, [-3, -3, +3, +3]); + $brbbox = $zinc->add('group', $top, + -sensitive => 0, -visible => 0, + -tags 'currentbbox'); + $zinc->add('rectangle', $brbbox, [-3, -3, +3, +3]); + $zinc->add('rectangle', $top, [0, 0, 1, 1], + -linecolor => 'red', -tags => 'lasso', + -visible => 0, -sensitive => 0); + + $zinc->bind('<ButtonPress-1>', \&start_lasso); + $zinc->bind('<ButtonRelease-1>', \&fin_lasso); + $zinc->bind('<ButtonPress-2>', sub { my @closest = $zinc->find('closest', + $zinc->XEvent->x, + $zinc->XEvent->y); + print "at point=$closest[0]\n" }); + + $zinc->bind('<ButtonPress-3>', [\&press, \&motion]); + $zinc->bind('<ButtonRelease-3>', \&release); + + $zinc->bind('<Shift-ButtonPress-3>', [\&press, \&zoom]); + $zinc->bind('<Shift-ButtonRelease-3>', \&release); + + $zinc->bind('<Control-ButtonPress-3>', [\&press, \&rotate]); + $zinc->bind('<Control-ButtonRelease-3>', \&release); + + $zinc->bind('current', '<Enter>', \&showbox); + $zinc->bind('current', '<Leave>', \&hidebox); +} + +# +# Controls for the window transform. +# +sub press { + my ($action) = @_; + my $lx = $zinc->XEvent->x; + my $ly = $zinc->XEvent->y; + + $cur_x $lx; + $cur_y $ly; + $cur_angle = atan2($y, $x); + $zinc->bind('<Motion>', $action); +} + +sub motion { + my $lx = $zinc->XEvent->x; + my $ly = $zinc->XEvent->y; + my @it; + my @res; + + @it = $zinc->find('withtag' 'controls'); + if (scalar(@it) == 0) { + return; + } + @res = $zinc->transform($it[0], [$lx, $ly, $cur_x, $cur_y]); + $zinc->translate('controls', $res[0] - $res[2], $res[1] - $res[3]); + $cur_x = $lx; + $cur_y = $ly; +} + +sub zoom { + my $lx = $zinc->XEvent->x; + my $ly = $zinc->XEvent->y; + my $maxx; + my $maxy; + my $sx; + my $sy; + + if ($lx > $cur_x) { + $maxx = $lx; + } else { + $maxx = $cur_x + } + if ($ly > $cur_y) { + $maxy = $ly + } else { + $maxy = $cur_y + } + $sx = 1.0 + ($lx - $cur_x)/$maxx; + $sy = 1.0 + ($ly - $cur_y)/$maxy; + $cur_x = $lx; + $cur_y = $ly; + $zinc->scale('controls', $sx, $sy); +} + +sub rotate { + my $lx = $zinc->XEvent->x; + my $ly = $zinc->XEvent->y; + my $langle; + + $langle = atan2($ly, $lx); + $zinc->rotate('controls', -($langle - $cur_angle)); + $cur_angle = $langle; +} + +sub release { + $zinc->bind('<Motion>', ''); +} + +sub start_lasso { + my $lx = $zinc->XEvent->x; + my $ly = $zinc->XEvent->y; + my @coords; + + $cur_x = $lx; + $cur_y = $ly; + $corner_x = $lx; + $corner_y = $ly; + @coords = $zinc->transform($top, [$x, $y]); + $zinc->coords('lasso', [$coords[0], $coords[1], $coords[0], $coords[1]]); + $zinc->itemconfigure('lasso' -visible => 1); + $zinc->raise('lasso'); + $zinc->bind('<Motion>', \&lasso); +} + +sub lasso { + my $lx = $zinc->XEvent->x; + my $ly = $zinc->XEvent->y; + my @coords; + + $corner_x = $lx; + $corner_y = $ly; + @coords = $zinc->transform($top [$cur_x, $cur_y, $lx, $ly]); + $zinc->coords('lasso', [$coords[0], $$coords[1], $coords[2], $coords[3]]); +} + +sub fin_lasso { + my $enclosed = join(', ', + $zinc->find('enclosed', $cur_x, $cur_y, $corner_x, $corner_y)); + my $overlapping = join(', ', + $zinc->find('overlapping', $cur_x, $cur_y, $corner_x, $corner_y)); + + $zinc->bind('<Motion>', ''); + $zinc->itemconfigure('lasso', -visible => 0); + print "enclosed=$enclosed, overlapping=$overlapping\n" +} + +sub showbox { + 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')); + + $zinc->coords($tlbbox, [$coords[0], $coords[1]]); + $zinc->coords($trbbox, [$coords[2], $coords[1]]); + $zinc->coords($brbbox, [$coords[2], $coords[3]]); + $zinc->coords($blbbox, [$coords[0], $coords[3]]); + $zinc->itemconfigure('currentbbox', -visible => 1); + } +} + +sub hidebox { + my $lx = $zinc->XEvent->x; + my $ly = $zinc->XEvent->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); + } +} + + |