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#!/opt/bin/perl |
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use Cwd (); |
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use Encode (); |
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use Gtk2 -init; |
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use Gtk2::Gdk::Keysyms; |
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use Gtk2::CV; |
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use Gtk2::CV::ImageWindow; |
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use Gtk2::CV::Schnauzer; |
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BEGIN { |
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require Gtk2::CV::Plugin; |
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require "$ENV{HOME}/.cvrc" if -r "$ENV{HOME}/.cvrc"; |
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} |
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use Gtk2::CV::Plugin::NameCluster; |
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use Gtk2::CV::Plugin::RCluster; |
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Gtk2::Rc->parse (Gtk2::CV::find_rcfile "gtkrc"); |
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use File::Spec; |
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my $mainwin; |
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my $viewer; |
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my $viewer_count; |
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my $schnauzer; |
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my $info; |
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my $help; |
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my $schnauzer_idx = 0; |
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sub new_schnauzer { |
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my $s = new Gtk2::CV::Schnauzer; |
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$s->signal_connect_after (key_press_event => \&std_keys); |
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$s->signal_connect (activate => sub { |
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my $label = sprintf "%s (%d)", |
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(File::Spec->splitpath ($_[1]))[2], |
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-s $_[1]; |
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$info->set_label ($label); |
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$viewer->load_image ($_[1]) if $viewer; # TODO: error, or chose ANY viewer |
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}); |
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Gtk2::CV::Plugin->call (new_schnauzer => $s); |
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$s |
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} |
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sub new_viewer { |
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my $self = new Gtk2::CV::ImageWindow; |
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$viewer_count++; |
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$self->set_title ("CV: Image"); |
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$self->signal_connect (key_press_event => sub { |
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$viewer = $_[0]; |
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my $key = $_[1]->keyval; |
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my $state = $_[1]->state; |
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if ($state * "control-mask" && $key == $Gtk2::Gdk::Keysyms{c}) { |
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my $viewer = new_viewer (); |
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$viewer->set_image ($_[0]->{image}); |
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$viewer->show_all; |
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} else { |
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&std_keys |
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or $schnauzer->signal_emit (key_press_event => $_[1]) |
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} |
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}); |
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$self->signal_connect (delete_event => sub { $_[0]->destroy; 0 }); |
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$self->signal_connect (destroy => sub { |
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$viewer = undef if $viewer == $_[0]; |
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main_quit Gtk2 unless --$viewer_count; |
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0 |
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}); |
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$self->signal_connect (button3_press_event => sub { |
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$mainwin->visible |
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? $mainwin->hide |
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: $mainwin->show_all; |
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}); |
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Gtk2::CV::Plugin->call (new_imagewindow => $self); |
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$self |
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} |
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sub std_keys { |
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my $key = $_[1]->keyval; |
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my $state = $_[1]->state; |
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my $ctrl = $state * "control-mask"; |
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if ($key == $Gtk2::Gdk::Keysyms{q}) { |
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$viewer->destroy; |
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} elsif ($ctrl && $key == $Gtk2::Gdk::Keysyms{v}) { |
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my $w = new Gtk2::Window; |
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$w->set_role ("schnauzer"); |
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$w->set_title ("CV: Schnauzer"); |
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$w->add (my $s = new_schnauzer); |
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$s->set_dir (File::Spec->curdir); |
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$s->set_geometry_hints; |
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$w->show_all; |
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} elsif ($ctrl && $key == $Gtk2::Gdk::Keysyms{h}) { |
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unless ($help) { |
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require Gtk2::PodViewer; |
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$help = new Gtk2::Window; |
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$help->set_role ("help"); |
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$help->set_title ("CV: Help"); |
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$help->set_default_size (500, 300); |
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$help->signal_connect (delete_event => sub { $help->hide; 1 }); |
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$help->add (my $sw = new Gtk2::ScrolledWindow); |
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$sw->add (my $h = new Gtk2::PodViewer); |
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#binmode DATA, ":utf8"; |
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$h->load_string (do { local $/; <DATA> }); |
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} |
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$help->show_all; |
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} else { |
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return 0; |
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} |
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1 |
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} |
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{ |
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$viewer = new_viewer; |
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$::cur_viewer = $viewer; |
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$schnauzer = new_schnauzer; |
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$mainwin = new Gtk2::Window; |
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$mainwin->set_role ("main"); |
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$mainwin->set_title ("CV"); |
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$mainwin->add (my $vbox = new Gtk2::VBox); |
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$mainwin->signal_connect (delete_event => sub { $mainwin->hide; 1 }); |
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$vbox->add ($schnauzer); |
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$vbox->pack_end (my $frame = new Gtk2::Frame, 0, 0, 0); |
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$frame->add (my $hbox = new Gtk2::HBox 0, 0); |
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$hbox->pack_start ((new Gtk2::Label "Info: "), 0, 0, 0); |
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$hbox->pack_end (my $labelwindow = new Gtk2::EventBox, 1, 1, 0); |
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$labelwindow->add ($info = new Gtk2::Label); |
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$labelwindow->signal_connect_after (size_request => sub { $_[1]->width (0); 0 }); |
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$info->set (selectable => 1, xalign => 0, justify => "left"); |
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$schnauzer->set_geometry_hints; |
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} |
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if (@ARGV) { |
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@ARGV == 1 && -d $ARGV[0] |
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? $schnauzer->set_dir (Glib::filename_to_unicode shift) |
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: $schnauzer->set_paths ([map Glib::filename_to_unicode $_, @ARGV], 1); |
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$schnauzer->show_all; |
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$schnauzer->handle_key ($Gtk2::Gdk::Keysyms{space}, []); |
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} else { |
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$schnauzer->set_dir (File::Spec->curdir); |
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$mainwin->show_all; |
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} |
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$viewer->show_all; |
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main Gtk2; |
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__DATA__ |
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=encoding utf-8 |
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=head1 NAME |
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cv - a fast gtk+ image viewer loosely modeled after XV |
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=head1 SYNOPSIS |
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cv [file...] |
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=head1 FEATURES |
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CV is supposed to work similar to the venerable XV image viewer, just |
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faster. Why faster? |
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=over 4 |
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=item * optimized directory scanning algorithm |
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The directory scanning in CV uses some tricks that - on most modern |
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filesystems - makes it possible to detect filetypes faster than stat()'ing |
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every file. This makes CV suitable for directories with lots of files |
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(10000+). |
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This algorithm is quite unprecise - it doesn't make a difference between |
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files, device nodes, symlinks and the like, and filetype detection is done |
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using the file extension only. |
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On the positive side, it is usually many orders of magnitude faster than |
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traditional scanning techniques (good for directories with 10000 or |
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100000+ files). |
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=item * queuing for all time-consuming background tasks |
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All tasks, such as unlinking files or generating thumbnails, that can be |
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done in the background will be done so - no waiting required, even when |
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changing directories. |
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=item * use of asynchronous I/O |
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CV tries to use asynchronous I/O whereever it makes sense, for example |
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while scanning directories, waiting for stat data, unlinking files or |
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generating thumbnails. This usually decreases scanning times for large |
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directories a bit (especially on RAID devices and over NFS) and makes CV |
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much more interactive. |
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=item * fast image loading |
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The time span between the user issuing a command and displaying the new |
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image should be as small as possible. CV uses optimized (especially |
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for JPEG) loading functions and sacrifices some quality (e.g no gamma |
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correction, although this might change) to achieve this speed. |
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=item * fast thumbnail creation |
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Thumbnail creation uses both CPU and Disk-I/O. CV interleaves both, so |
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on modern CPUs, thumbnailing is usually limited by I/O speed. Thumbnail |
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creation for JPEGs has been specially optimized and can even take |
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advantage of multiple CPUs. |
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=item * minimum optical clutter |
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CV has no menus or other user interface elements that take up a lot of |
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screen space (or are useful for beginning users). The schnauzer windows |
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can also be somewhat crowded. |
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The point of an image viewer is viewing images, not a nice GUI. This is |
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similar to XV's behaviour. |
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=item * efficient (and hard to learn) user interface |
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CV uses key combinations. A lot. If you are an experienced XV user, you |
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will find most of these keys familiar. If not, CV might be hard to use at |
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first, but will be an efficient tool later. |
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=item * multi-window GUI |
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CV doesn't force you to use a specific layout, instead it relies on your |
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window manager, thus enabling you to chose whatever layout that suits you |
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most. |
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=item * i18n'ed filename handling throughout |
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As long as glib can recognize your filename encoding (either UTF-8 or |
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locale-specific, depending on the setting of G_BROKEN_FILENAMES) and you |
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have the relevant fonts, CV will display your filenames correctly. |
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=item * extensible through plug-ins |
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I have weird plug-ins that access remote databases to find a |
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directory. This is not likely to be of any use to other people. Likewise, |
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others might have weird requirements I cannot dream of. |
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=item * filename clustering |
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Among the standard plug-ins is a filename clustering plug-in, that (in |
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case of tens of thousands images in one directory) might be able to |
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cluster similar names together. |
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=back |
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=head1 DESCRIPTION |
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=head2 THE IMAGE WINDOW |
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You can use the following keys in the image window: |
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q quit the program |
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< half the image size |
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> double the image size |
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, shrink the image by 10% |
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. enlarge the image by 10% |
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n reset to normal size |
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m maximize to screensize |
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M maximize to screensize, respecting image aspect |
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ctrl-m toggle maxpect-always mode |
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ctrl-sift-m toggle using current image size as max image size |
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u uncrop |
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r set scaling mode to 'nearest' (fastest) |
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s set scaling mode to 'bilinear' (default) |
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shift-s set scaling mode to 'hyper' (slowest) |
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t rotate clockwise 90° |
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T rotate counterclockwise° |
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a apply all rotations loslessly to a jpeg file (using exiftran) |
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ctrl-v open a new visual schnauzer window for the current dir |
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ctrl-c clone the current image window |
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ctrl-e run an editor ($CV_EDITOR or "gimp") on the current image |
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ctrl-p fire up the print dialog |
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escape cancel a crop action |
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|
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And when playing movies, these additional keys are active: |
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left rewind by 10 seconds |
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right forward by 10 seconds |
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down rewind by 60 seconds |
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up forward by 60 seconds |
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pg_up rewind by 600 seconds |
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pg_down forward by 600 seconds |
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o toggle on-screen display |
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p pause/unpause |
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escape stop playing |
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9 turn volume down |
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0 turn volume up |
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Any other keys will be sent to the default schnauzer window, which can be |
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toggled on and off by right-clicking into the image window. |
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Left-clicking into the image window will let you crop the image (usually |
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to zoom into large images that CV scales down). |
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=head2 THE VISUAL SCHNAUZER |
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Any image-loading action in a schnauzer window acts on the |
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"last-recently-activated" imagewindow, which currently is simply the last |
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image window that received a keypress. |
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You can use the following keys in the schnauzer window: |
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ctrl-space, |
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space move to and display next image |
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ctrl-backspace, |
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backspace move to and display previous image |
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ctrl-return, |
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return display selected picture, or enter directory |
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cursor keys move selection |
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page-up move one page up |
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page-down move one page down |
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home move to first file |
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end move to last file |
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ctrl-a select all files |
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ctrl-shift-a select all files currently displayed in the schnauzer window |
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ctrl-d delete selected files WITHOUT ASKING AGAIN |
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ctrl-g force generation of thumbnais for the selected files |
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ctrl-s rescan current direcory or files updates/deletes etc. |
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ctrl-u update selected (or all) icons if neccessary |
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ctrl-l don't use, will become a plug-in eventually |
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^ go to parent directory (caret). |
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0-9, |
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a-z find the first filename beginning with this letter |
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Right-clicking into the schnauzer window displays a pop-up menu with |
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additional actions. |
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=head3 SELECTION |
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You can select entries in the Schnauzer in a variety of ways: |
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=over 4 |
373 |
|
|
|
374 |
|
|
=item Keyboard |
375 |
|
|
|
376 |
|
|
Moving the cursor with the keyboard will first deselect all files and then |
377 |
|
|
select the file you moved to. |
378 |
|
|
|
379 |
root |
1.61 |
=item Clicking |
380 |
root |
1.60 |
|
381 |
root |
1.61 |
Clicking on an entry will select the one you clicked and deselect all |
382 |
|
|
others. |
383 |
root |
1.60 |
|
384 |
root |
1.61 |
=item Shift-Clicking |
385 |
|
|
|
386 |
|
|
Shift-clicking will toggle the selection on the entry under the mouse. |
387 |
|
|
|
388 |
|
|
=item Dragging |
389 |
root |
1.60 |
|
390 |
|
|
Dragging will select all entries between the one selected when pushing the |
391 |
|
|
button and the one selected when releasing the button. If you move above |
392 |
|
|
or below the schnauzer area while drag-selecting, the schnauzer will move |
393 |
|
|
up/down one row twice per second. In addition, horizontal mouse movement |
394 |
|
|
acts as a kind of invisible horizontal scrollbar. |
395 |
|
|
|
396 |
|
|
=item Hint: double-click works while click-selecting |
397 |
|
|
|
398 |
|
|
You can double-click any image while click-selecting to display it |
399 |
|
|
without stopping the selection process. This will act as if you normally |
400 |
|
|
double-clicked the image to display it, and will toggle the selection |
401 |
|
|
twice, resulting in no change. |
402 |
|
|
|
403 |
|
|
=back |
404 |
|
|
|
405 |
root |
1.47 |
=head1 FILES |
406 |
|
|
|
407 |
|
|
When starting, CV runs the F<.cvrc> file in your F<$HOME> directory as if |
408 |
|
|
it were a perl script. in that, you will mostly load plug-ins. |
409 |
|
|
|
410 |
|
|
Example: |
411 |
|
|
|
412 |
|
|
system "fping -q -t 10 ether" |
413 |
|
|
or require "/fs/cv/cvplugin.pl"; |
414 |
|
|
|
415 |
|
|
This will load a plug-in, but only if the machine I<ether> is reachable |
416 |
|
|
(supposedly the plug-in is networked in some way :). |
417 |
root |
1.11 |
|
418 |
root |
1.27 |
=head1 ENVIRONMENT |
419 |
|
|
|
420 |
|
|
=over 4 |
421 |
|
|
|
422 |
root |
1.38 |
=item CV_EDITOR |
423 |
|
|
|
424 |
|
|
The program that gets executed when the user presses C<CTRL-e> in the |
425 |
|
|
Schnauzer or image window. The default is C<gimp>. |
426 |
|
|
|
427 |
root |
1.27 |
=item CV_PRINT_DESTINATION |
428 |
|
|
|
429 |
|
|
The default (perl-style) destination to use in the print dialog. |
430 |
|
|
|
431 |
root |
1.38 |
=item CV_TRASHCAN |
432 |
|
|
|
433 |
|
|
When set, must point to a directory where all files that are deleted are |
434 |
|
|
moved to. If unset, files that are deleted are really being deleted. |
435 |
|
|
|
436 |
root |
1.27 |
=back |
437 |
|
|
|
438 |
root |
1.23 |
=head1 SECURITY CONSIDERATIONS |
439 |
|
|
|
440 |
root |
1.54 |
CV uses Pixbuf to load non-JPEG images. Pixbuf is not considered safe for |
441 |
|
|
this purpose, though (from the gtk-2.2 release notes): |
442 |
root |
1.23 |
|
443 |
|
|
"While efforts have been made to make gdk-pixbuf robust against invalid |
444 |
|
|
images, using gdk-pixbuf to load untrusted data is not recommended, due to |
445 |
|
|
the likelyhood that there are additional problems where an invalid image |
446 |
|
|
could cause gdk-pixbuf to crash or worse." |
447 |
|
|
|
448 |
root |
1.11 |
=head1 BUGS/TODO |
449 |
root |
1.23 |
|
450 |
root |
1.47 |
Lots of functionality is missing. |
451 |
|
|
|
452 |
|
|
Pixbuf doesn't always honor G_BROKEN_FILENAMES, so accessing files with |
453 |
root |
1.54 |
names incompatible with utf-8 might fail. |
454 |
root |
1.11 |
|
455 |
|
|
rotate on disk |
456 |
|
|
lots of ui issues |
457 |
|
|
save(?) |
458 |
|
|
preferences |
459 |
|
|
|
460 |
|
|
=head1 AUTHOR |
461 |
|
|
|
462 |
|
|
Marc Lehmann <cv@plan9.de>. |
463 |
|
|
|
464 |
|
|
=cut |
465 |
root |
1.1 |
|