[ViewVC] Annotation of: cvs/CV/bin/cv

#!/opt/bin/perl

use Cwd ();
use Encode ();

use Gtk2 -init;
use Gtk2::Gdk::Keysyms;

use Gtk2::CV;

use Gtk2::CV::ImageWindow;
use Gtk2::CV::Schnauzer;

BEGIN {
   require Gtk2::CV::Plugin;
   require "$ENV{HOME}/.cvrc" if -r "$ENV{HOME}/.cvrc";
}

use Gtk2::CV::Plugin::NameCluster;
use Gtk2::CV::Plugin::RCluster;

Gtk2::Rc->parse (Gtk2::CV::find_rcfile "gtkrc");

use File::Spec;

my $mainwin;
my $viewer;
my $viewer_count;
my $schnauzer;
my $info;
my $help;

my $schnauzer_idx = 0;

sub new_schnauzer {
   my $s = new Gtk2::CV::Schnauzer;

   $s->signal_connect_after (key_press_event => \&std_keys);
   $s->signal_connect (activate => sub {
      my $label = sprintf "%s (%d)",
                  (File::Spec->splitpath ($_[1]))[2],
                  -s $_[1];
      $info->set_label ($label);
      $viewer->load_image ($_[1]) if $viewer; # TODO: error, or chose ANY viewer
   });

   Gtk2::CV::Plugin->call (new_schnauzer => $s);

   $s
}

sub new_viewer {
   my $self = new Gtk2::CV::ImageWindow;

   $viewer_count++;

   $self->set_title ("CV: Image");

   $self->signal_connect (key_press_event => sub {
      $viewer = $_[0];

      my $key = $_[1]->keyval;
      my $state = $_[1]->state;

      if ($state * "control-mask" && $key == $Gtk2::Gdk::Keysyms{c}) {
         my $viewer = new_viewer ();
         $viewer->set_image ($_[0]->{image});
         $viewer->show_all;
         1
      } else {
         &std_keys
            or $schnauzer->signal_emit (key_press_event => $_[1])
      }
   });
   $self->signal_connect (delete_event => sub { $_[0]->destroy; 0 });
   $self->signal_connect (destroy => sub {
      $viewer = undef if $viewer == $_[0];

      main_quit Gtk2 unless --$viewer_count;

      0
   });

   $self->signal_connect (button3_press_event => sub {
      $mainwin->visible
         ? $mainwin->hide
         : $mainwin->show_all;

      1
   });

   Gtk2::CV::Plugin->call (new_imagewindow => $self);

   $self
}

sub std_keys {
   my $key = $_[1]->keyval;
   my $state = $_[1]->state;

   my $ctrl = $state * "control-mask";

   if ($key == $Gtk2::Gdk::Keysyms{q}) {
      $viewer->destroy;
   } elsif ($ctrl && $key == $Gtk2::Gdk::Keysyms{v}) {
      my $w = new Gtk2::Window;

      $w->set_role ("schnauzer");
      $w->set_title ("CV: Schnauzer");
      $w->add (my $s = new_schnauzer);
      $s->set_dir (File::Spec->curdir);
      $s->set_geometry_hints;
      $w->show_all;

   } elsif ($ctrl && $key == $Gtk2::Gdk::Keysyms{h}) {
      unless ($help) {
         require Gtk2::PodViewer;

         $help = new Gtk2::Window;
         $help->set_role ("help");
         $help->set_title ("CV: Help");
         $help->set_default_size (500, 300);
         $help->signal_connect (delete_event => sub { $help->hide; 1 });

         $help->add (my $sw = new Gtk2::ScrolledWindow);
         $sw->add (my $h = new Gtk2::PodViewer);

         #binmode DATA, ":utf8";
         $h->load_string (do { local $/; <DATA> });
      }

      $help->show_all;
   } else {
      return 0;
   }

   1
}

{
   $viewer = new_viewer;
   $::cur_viewer = $viewer;

   $schnauzer = new_schnauzer;

   $mainwin = new Gtk2::Window;
   $mainwin->set_role ("main");
   $mainwin->set_title ("CV");
   $mainwin->add (my $vbox = new Gtk2::VBox);
   $mainwin->signal_connect (delete_event => sub { $mainwin->hide; 1 });

   $vbox->add ($schnauzer);
   $vbox->pack_end (my $frame = new Gtk2::Frame, 0, 0, 0);
   $frame->add (my $hbox = new Gtk2::HBox 0, 0);
   $hbox->pack_start ((new Gtk2::Label "Info: "), 0, 0, 0);
   $hbox->pack_end   (my $labelwindow = new Gtk2::EventBox, 1, 1, 0);
   $labelwindow->add ($info = new Gtk2::Label);
   $labelwindow->signal_connect_after (size_request => sub { $_[1]->width (0); 0 });
   $info->set (selectable => 1, xalign => 0, justify => "left");

   $schnauzer->set_geometry_hints;
}

if (@ARGV) {
   my $show_first = sub {
      $schnauzer->show_all;
      $schnauzer->handle_key ($Gtk2::Gdk::Keysyms{space}, []);
      $viewer->show_all;
   };

   @ARGV == 1 && -d $ARGV[0]
      ? $schnauzer->set_dir (Glib::filename_to_unicode shift, $show_first)
      : $schnauzer->set_paths ([map Glib::filename_to_unicode $_, @ARGV], 1, $show_first);
} else {
   $schnauzer->set_dir (File::Spec->curdir, sub {
      $mainwin->show_all;
      $viewer->show_all;
   });
}

main Gtk2;

Gtk2::CV::flush_aio;

__DATA__

=encoding utf-8

=head1 NAME

cv - a fast gtk+ image viewer loosely modeled after XV

=head1 SYNOPSIS

   cv [file...]

=head1 FEATURES

CV is supposed to work similar to the venerable XV image viewer, just
faster. Why faster?

=over 4

=item * optimized directory scanning algorithm

The directory scanning in CV uses some tricks that - on most modern
filesystems - makes it possible to detect filetypes faster than stat()'ing
every file. This makes CV suitable for directories with lots of files
(10000+).

This algorithm is quite unprecise - it doesn't make a difference between
files, device nodes, symlinks and the like, and filetype detection is done
using the file extension only.

On the positive side, it is usually many orders of magnitude faster than
traditional scanning techniques (good for directories with 10000 or
100000+ files).

=item * queuing for all time-consuming background tasks

All tasks, such as unlinking files or generating thumbnails, that can be
done in the background will be done so - no waiting required, even when
changing directories.

=item * use of asynchronous I/O

CV tries to use asynchronous I/O whereever it makes sense, for example
while scanning directories, waiting for stat data, unlinking files or
generating thumbnails. This usually decreases scanning times for large
directories a bit (especially on RAID devices and over NFS) and makes CV
much more interactive.

=item * fast image loading

The time span between the user issuing a command and displaying the new
image should be as small as possible. CV uses optimized (especially
for JPEG) loading functions and sacrifices some quality (e.g no gamma
correction, although this might change) to achieve this speed.

=item * fast thumbnail creation

Thumbnail creation uses both CPU and Disk-I/O. CV interleaves both, so
on modern CPUs, thumbnailing is usually limited by I/O speed. Thumbnail
creation for JPEGs has been specially optimized and can even take
advantage of multiple CPUs.

=item * minimum optical clutter

CV has no menus or other user interface elements that take up a lot of
screen space (or are useful for beginning users). The schnauzer windows
can also be somewhat crowded.

The point of an image viewer is viewing images, not a nice GUI. This is
similar to XV's behaviour.

=item * efficient (and hard to learn) user interface

CV uses key combinations. A lot. If you are an experienced XV user, you
will find most of these keys familiar. If not, CV might be hard to use at
first, but will be an efficient tool later.

=item * multi-window GUI

CV doesn't force you to use a specific layout, instead it relies on your
window manager, thus enabling you to chose whatever layout that suits you
most.

=item * i18n'ed filename handling throughout

As long as glib can recognize your filename encoding (either UTF-8 or
locale-specific, depending on the setting of G_BROKEN_FILENAMES) and you
have the relevant fonts, CV will display your filenames correctly.

=item * extensible through plug-ins

I have weird plug-ins that access remote databases to find a
directory. This is not likely to be of any use to other people. Likewise,
others might have weird requirements I cannot dream of.

=item * filename clustering

Among the standard plug-ins is a filename clustering plug-in, that (in
case of tens of thousands images in one directory) might be able to
cluster similar names together.

=back

=head1 DESCRIPTION

=head2 THE IMAGE WINDOW

You can use the following keys in the image window:

 q            quit the program
 <            half the image size
 >            double the image size
 ,            shrink the image by 10%
 .            enlarge the image by 10%
 n            reset to normal size
 m            maximize to screensize
 M            maximize to screensize, respecting image aspect
 ctrl-m       toggle maxpect-always mode
 ctrl-sift-m  toggle using current image size as max image size
 u            uncrop
 r            set scaling mode to 'nearest' (fastest)
 s            set scaling mode to 'bilinear' (default)
 shift-s      set scaling mode to 'hyper' (slowest)
 t            rotate clockwise 90°
 T            rotate counterclockwise°
 a            apply all rotations loslessly to a jpeg file (using exiftran)
 ctrl-v       open a new visual schnauzer window for the current dir
 ctrl-c       clone the current image window
 ctrl-e       run an editor ($CV_EDITOR or "gimp") on the current image
 ctrl-p       fire up the print dialog
 escape       cancel a crop action

And when playing movies, these additional keys are active:

 left         rewind by 10 seconds
 right        forward by 10 seconds
 down         rewind by 60 seconds
 up           forward by 60 seconds
 pg_up        rewind by 600 seconds
 pg_down      forward by 600 seconds
 o            toggle on-screen display
 p            pause/unpause
 escape       stop playing
 9            turn volume down
 0            turn volume up

Any other keys will be sent to the default schnauzer window, which can be
toggled on and off by right-clicking into the image window.

Left-clicking into the image window will let you crop the image (usually
to zoom into large images that CV scales down).

=head2 THE VISUAL SCHNAUZER

Any image-loading action in a schnauzer window acts on the
"last-recently-activated" imagewindow, which currently is simply the last
image window that received a keypress.

You can use the following keys in the schnauzer window:

 ctrl-space,
 space        move to and display next image
 ctrl-backspace,
 backspace    move to and display previous image
 ctrl-return,
 return       display selected picture, or enter directory

 cursor keys  move selection
 page-up      move one page up
 page-down    move one page down
 home         move to first file
 end          move to last file

 ctrl-a       select all files
 ctrl-shift-a select all files currently displayed in the schnauzer window
 ctrl-d       delete selected files WITHOUT ASKING AGAIN
 ctrl-g       force generation of thumbnais for the selected files
 ctrl-s       rescan current direcory or files updates/deletes etc.
 ctrl-u       update selected (or all) icons if neccessary
 ctrl-l       don't use, will become a plug-in eventually

 ^            go to parent directory (caret).

 0-9,
 a-z          find the first filename beginning with this letter

Right-clicking into the schnauzer window displays a pop-up menu with
additional actions.

=head3 SELECTION

You can select entries in the Schnauzer in a variety of ways:

=over 4

=item Keyboard

Moving the cursor with the keyboard will first deselect all files and then
select the file you moved to.

=item Clicking

Clicking on an entry will select the one you clicked and deselect all
others.

=item Shift-Clicking

Shift-clicking will toggle the selection on the entry under the mouse.

=item Dragging

Dragging will select all entries between the one selected when pushing the
button and the one selected when releasing the button. If you move above
or below the schnauzer area while drag-selecting, the schnauzer will move
up/down one row twice per second. In addition, horizontal mouse movement
acts as a kind of invisible horizontal scrollbar.

=item Hint: double-click works while click-selecting

You can double-click any image while click-selecting to display it
without stopping the selection process. This will act as if you normally
double-clicked the image to display it, and will toggle the selection
twice, resulting in no change.

=back

=head1 FILES

When starting, CV runs the F<.cvrc> file in your F<$HOME> directory as if
it were a perl script. in that, you will mostly load plug-ins.

Example:

   system "fping -q -t 10 ether"
     or require "/fs/cv/cvplugin.pl";

This will load a plug-in, but only if the machine I<ether> is reachable
(supposedly the plug-in is networked in some way :).

=head1 ENVIRONMENT

=over 4

=item CV_EDITOR

The program that gets executed when the user presses C<CTRL-e> in the
Schnauzer or image window. The default is C<gimp>.

=item CV_PRINT_DESTINATION

The default (perl-style) destination to use in the print dialog.

=item CV_TRASHCAN

When set, must point to a directory where all files that are deleted are
moved to. If unset, files that are deleted are really being deleted.

=back

=head1 SECURITY CONSIDERATIONS

CV uses Pixbuf to load non-JPEG images. Pixbuf is not considered safe for
this purpose, though (from the gtk-2.2 release notes):

"While efforts have been made to make gdk-pixbuf robust against invalid
images, using gdk-pixbuf to load untrusted data is not recommended, due to
the likelyhood that there are additional problems where an invalid image
could cause gdk-pixbuf to crash or worse."

=head1 BUGS/TODO

 Lots of functionality is missing.

 Pixbuf doesn't always honor G_BROKEN_FILENAMES, so accessing files with
 names incompatible with utf-8 might fail.

 rotate on disk
 lots of ui issues
 save(?)
 preferences

=head1 AUTHOR

Marc Lehmann <cv@plan9.de>.

=cut

Revision:	1.69
Committed:	Thu Nov 2 00:09:15 2006 UTC (17 years, 7 months ago) by root
Branch:	MAIN
CVS Tags:	rel-1_4
Changes since 1.68:	+2 -0 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.1	#!/opt/bin/perl
2
3	root	1.37	use Cwd ();
4			use Encode ();
5
6	root	1.12	use Gtk2 -init;
7			use Gtk2::Gdk::Keysyms;
8
9	root	1.48	use Gtk2::CV;
10
11	root	1.12	use Gtk2::CV::ImageWindow;
12			use Gtk2::CV::Schnauzer;
13
14	root	1.48	BEGIN {
15			require Gtk2::CV::Plugin;
16			require "$ENV{HOME}/.cvrc" if -r "$ENV{HOME}/.cvrc";
17			}
18
19			use Gtk2::CV::Plugin::NameCluster;
20			use Gtk2::CV::Plugin::RCluster;
21	root	1.16
22			Gtk2::Rc->parse (Gtk2::CV::find_rcfile "gtkrc");
23
24	root	1.20	use File::Spec;
25
26			my $mainwin;
27	root	1.12	my $viewer;
28	root	1.62	my $viewer_count;
29	root	1.12	my $schnauzer;
30	root	1.20	my $info;
31	root	1.21	my $help;
32	root	1.12
33	root	1.25	my $schnauzer_idx = 0;
34
35	root	1.12	sub new_schnauzer {
36	root	1.20	my $s = new Gtk2::CV::Schnauzer;
37	root	1.12
38			$s->signal_connect_after (key_press_event => \&std_keys);
39	root	1.20	$s->signal_connect (activate => sub {
40			my $label = sprintf "%s (%d)",
41			(File::Spec->splitpath ($_[1]))[2],
42			-s $_[1];
43			$info->set_label ($label);
44	root	1.62	$viewer->load_image ($_[1]) if $viewer; # TODO: error, or chose ANY viewer
45	root	1.20	});
46	root	1.12
47	root	1.40	Gtk2::CV::Plugin->call (new_schnauzer => $s);
48
49	root	1.53	$s
50	root	1.12	}
51
52	root	1.62	sub new_viewer {
53			my $self = new Gtk2::CV::ImageWindow;
54
55			$viewer_count++;
56
57			$self->set_title ("CV: Image");
58
59			$self->signal_connect (key_press_event => sub {
60			$viewer = $_[0];
61
62			my $key = $_[1]->keyval;
63			my $state = $_[1]->state;
64
65			if ($state * "control-mask" && $key == $Gtk2::Gdk::Keysyms{c}) {
66			my $viewer = new_viewer ();
67			$viewer->set_image ($_[0]->{image});
68			$viewer->show_all;
69			1
70			} else {
71			&std_keys
72			or $schnauzer->signal_emit (key_press_event => $_[1])
73			}
74			});
75	root	1.63	$self->signal_connect (delete_event => sub { $_[0]->destroy; 0 });
76	root	1.62	$self->signal_connect (destroy => sub {
77			$viewer = undef if $viewer == $_[0];
78
79			main_quit Gtk2 unless --$viewer_count;
80	root	1.63
81			0
82	root	1.62	});
83
84			$self->signal_connect (button3_press_event => sub {
85			$mainwin->visible
86			? $mainwin->hide
87			: $mainwin->show_all;
88	root	1.63
89	root	1.62	1
90			});
91
92			Gtk2::CV::Plugin->call (new_imagewindow => $self);
93
94			$self
95			}
96
97	root	1.12	sub std_keys {
98			my $key = $_[1]->keyval;
99			my $state = $_[1]->state;
100
101	root	1.21	my $ctrl = $state * "control-mask";
102	root	1.12
103			if ($key == $Gtk2::Gdk::Keysyms{q}) {
104	root	1.62	$viewer->destroy;
105	root	1.12	} elsif ($ctrl && $key == $Gtk2::Gdk::Keysyms{v}) {
106	root	1.20	my $w = new Gtk2::Window;
107	root	1.26
108	root	1.66	$w->set_role ("schnauzer");
109	root	1.26	$w->set_title ("CV: Schnauzer");
110	root	1.20	$w->add (my $s = new_schnauzer);
111			$s->set_dir (File::Spec->curdir);
112	root	1.25	$s->set_geometry_hints;
113	root	1.21	$w->show_all;
114	root	1.25
115	root	1.21	} elsif ($ctrl && $key == $Gtk2::Gdk::Keysyms{h}) {
116			unless ($help) {
117			require Gtk2::PodViewer;
118
119			$help = new Gtk2::Window;
120	root	1.67	$help->set_role ("help");
121	root	1.26	$help->set_title ("CV: Help");
122	root	1.21	$help->set_default_size (500, 300);
123			$help->signal_connect (delete_event => sub { $help->hide; 1 });
124
125			$help->add (my $sw = new Gtk2::ScrolledWindow);
126			$sw->add (my $h = new Gtk2::PodViewer);
127
128			#binmode DATA, ":utf8";
129			$h->load_string (do { local $/; <DATA> });
130			}
131
132			$help->show_all;
133	root	1.12	} else {
134	root	1.43	return 0;
135	root	1.12	}
136
137	root	1.43	1
138	root	1.12	}
139
140	root	1.20	{
141	root	1.62	$viewer = new_viewer;
142			$::cur_viewer = $viewer;
143	root	1.40
144	root	1.20	$schnauzer = new_schnauzer;
145
146			$mainwin = new Gtk2::Window;
147	root	1.66	$mainwin->set_role ("main");
148	root	1.20	$mainwin->set_title ("CV");
149			$mainwin->add (my $vbox = new Gtk2::VBox);
150	root	1.53	$mainwin->signal_connect (delete_event => sub { $mainwin->hide; 1 });
151	root	1.20
152			$vbox->add ($schnauzer);
153	root	1.22	$vbox->pack_end (my $frame = new Gtk2::Frame, 0, 0, 0);
154	root	1.20	$frame->add (my $hbox = new Gtk2::HBox 0, 0);
155	root	1.45	$hbox->pack_start ((new Gtk2::Label "Info: "), 0, 0, 0);
156			$hbox->pack_end (my $labelwindow = new Gtk2::EventBox, 1, 1, 0);
157			$labelwindow->add ($info = new Gtk2::Label);
158			$labelwindow->signal_connect_after (size_request => sub { $_[1]->width (0); 0 });
159			$info->set (selectable => 1, xalign => 0, justify => "left");
160	root	1.25
161			$schnauzer->set_geometry_hints;
162	root	1.20	}
163	root	1.12
164			if (@ARGV) {
165	root	1.68	my $show_first = sub {
166			$schnauzer->show_all;
167			$schnauzer->handle_key ($Gtk2::Gdk::Keysyms{space}, []);
168			$viewer->show_all;
169			};
170
171	root	1.52	@ARGV == 1 && -d $ARGV[0]
172	root	1.68	? $schnauzer->set_dir (Glib::filename_to_unicode shift, $show_first)
173			: $schnauzer->set_paths ([map Glib::filename_to_unicode $_, @ARGV], 1, $show_first);
174	root	1.17	} else {
175	root	1.68	$schnauzer->set_dir (File::Spec->curdir, sub {
176			$mainwin->show_all;
177			$viewer->show_all;
178			});
179	root	1.12	}
180
181			main Gtk2;
182	root	1.21
183	root	1.69	Gtk2::CV::flush_aio;
184
185	root	1.21	__DATA__
186	root	1.12
187	root	1.58	=encoding utf-8
188
189	root	1.11	=head1 NAME
190
191	root	1.47	cv - a fast gtk+ image viewer loosely modeled after XV
192	root	1.11
193			=head1 SYNOPSIS
194
195			cv [file...]
196
197	root	1.47	=head1 FEATURES
198
199			CV is supposed to work similar to the venerable XV image viewer, just
200			faster. Why faster?
201
202			=over 4
203
204			=item * optimized directory scanning algorithm
205
206	root	1.55	The directory scanning in CV uses some tricks that - on most modern
207	root	1.47	filesystems - makes it possible to detect filetypes faster than stat()'ing
208			every file. This makes CV suitable for directories with lots of files
209			(10000+).
210
211			This algorithm is quite unprecise - it doesn't make a difference between
212			files, device nodes, symlinks and the like, and filetype detection is done
213			using the file extension only.
214
215	root	1.55	On the positive side, it is usually many orders of magnitude faster than
216			traditional scanning techniques (good for directories with 10000 or
217			100000+ files).
218
219	root	1.53	=item * queuing for all time-consuming background tasks
220
221			All tasks, such as unlinking files or generating thumbnails, that can be
222			done in the background will be done so - no waiting required, even when
223			changing directories.
224
225	root	1.47	=item * use of asynchronous I/O
226
227			CV tries to use asynchronous I/O whereever it makes sense, for example
228	root	1.53	while scanning directories, waiting for stat data, unlinking files or
229			generating thumbnails. This usually decreases scanning times for large
230			directories a bit (especially on RAID devices and over NFS) and makes CV
231			much more interactive.
232	root	1.47
233			=item * fast image loading
234
235			The time span between the user issuing a command and displaying the new
236			image should be as small as possible. CV uses optimized (especially
237			for JPEG) loading functions and sacrifices some quality (e.g no gamma
238	root	1.55	correction, although this might change) to achieve this speed.
239	root	1.47
240			=item * fast thumbnail creation
241
242	root	1.55	Thumbnail creation uses both CPU and Disk-I/O. CV interleaves both, so
243			on modern CPUs, thumbnailing is usually limited by I/O speed. Thumbnail
244			creation for JPEGs has been specially optimized and can even take
245			advantage of multiple CPUs.
246	root	1.47
247			=item * minimum optical clutter
248
249			CV has no menus or other user interface elements that take up a lot of
250	root	1.55	screen space (or are useful for beginning users). The schnauzer windows
251			can also be somewhat crowded.
252	root	1.47
253			The point of an image viewer is viewing images, not a nice GUI. This is
254			similar to XV's behaviour.
255
256			=item * efficient (and hard to learn) user interface
257
258			CV uses key combinations. A lot. If you are an experienced XV user, you
259			will find most of these keys familiar. If not, CV might be hard to use at
260			first, but will be an efficient tool later.
261
262	root	1.55	=item * multi-window GUI
263
264			CV doesn't force you to use a specific layout, instead it relies on your
265			window manager, thus enabling you to chose whatever layout that suits you
266			most.
267
268	root	1.47	=item * i18n'ed filename handling throughout
269
270			As long as glib can recognize your filename encoding (either UTF-8 or
271	root	1.55	locale-specific, depending on the setting of G_BROKEN_FILENAMES) and you
272			have the relevant fonts, CV will display your filenames correctly.
273	root	1.47
274			=item * extensible through plug-ins
275
276			I have weird plug-ins that access remote databases to find a
277			directory. This is not likely to be of any use to other people. Likewise,
278			others might have weird requirements I cannot dream of.
279
280			=item * filename clustering
281
282			Among the standard plug-ins is a filename clustering plug-in, that (in
283			case of tens of thousands images in one directory) might be able to
284			cluster similar names together.
285
286			=back
287
288	root	1.11	=head1 DESCRIPTION
289
290			=head2 THE IMAGE WINDOW
291
292			You can use the following keys in the image window:
293
294	root	1.50	q quit the program
295			< half the image size
296			> double the image size
297			, shrink the image by 10%
298			. enlarge the image by 10%
299			n reset to normal size
300			m maximize to screensize
301			M maximize to screensize, respecting image aspect
302			ctrl-m toggle maxpect-always mode
303	root	1.59	ctrl-sift-m toggle using current image size as max image size
304	root	1.50	u uncrop
305			r set scaling mode to 'nearest' (fastest)
306			s set scaling mode to 'bilinear' (default)
307			shift-s set scaling mode to 'hyper' (slowest)
308			t rotate clockwise 90°
309			T rotate counterclockwise°
310	root	1.64	a apply all rotations loslessly to a jpeg file (using exiftran)
311	root	1.50	ctrl-v open a new visual schnauzer window for the current dir
312	root	1.63	ctrl-c clone the current image window
313	root	1.50	ctrl-e run an editor ($CV_EDITOR or "gimp") on the current image
314	root	1.57	ctrl-p fire up the print dialog
315	root	1.50	escape cancel a crop action
316	root	1.11
317	root	1.33	And when playing movies, these additional keys are active:
318
319	root	1.50	left rewind by 10 seconds
320			right forward by 10 seconds
321			down rewind by 60 seconds
322			up forward by 60 seconds
323			pg_up rewind by 600 seconds
324			pg_down forward by 600 seconds
325			o toggle on-screen display
326			p pause/unpause
327			escape stop playing
328			9 turn volume down
329			0 turn volume up
330	root	1.33
331	root	1.47	Any other keys will be sent to the default schnauzer window, which can be
332			toggled on and off by right-clicking into the image window.
333	root	1.11
334	root	1.47	Left-clicking into the image window will let you crop the image (usually
335			to zoom into large images that CV scales down).
336	root	1.11
337			=head2 THE VISUAL SCHNAUZER
338
339	root	1.63	Any image-loading action in a schnauzer window acts on the
340			"last-recently-activated" imagewindow, which currently is simply the last
341			image window that received a keypress.
342
343	root	1.11	You can use the following keys in the schnauzer window:
344
345	root	1.47	ctrl-space,
346	root	1.50	space move to and display next image
347	root	1.47	ctrl-backspace,
348	root	1.50	backspace move to and display previous image
349	root	1.47	ctrl-return,
350	root	1.50	return display selected picture, or enter directory
351	root	1.11
352	root	1.50	cursor keys move selection
353			page-up move one page up
354			page-down move one page down
355			home move to first file
356			end move to last file
357
358			ctrl-a select all files
359			ctrl-shift-a select all files currently displayed in the schnauzer window
360			ctrl-d delete selected files WITHOUT ASKING AGAIN
361			ctrl-g force generation of thumbnais for the selected files
362			ctrl-s rescan current direcory or files updates/deletes etc.
363			ctrl-u update selected (or all) icons if neccessary
364			ctrl-l don't use, will become a plug-in eventually
365	root	1.47
366	root	1.56	^ go to parent directory (caret).
367
368	root	1.47	0-9,
369	root	1.50	a-z find the first filename beginning with this letter
370	root	1.47
371			Right-clicking into the schnauzer window displays a pop-up menu with
372			additional actions.
373
374	root	1.60	=head3 SELECTION
375
376			You can select entries in the Schnauzer in a variety of ways:
377
378			=over 4
379
380			=item Keyboard
381
382			Moving the cursor with the keyboard will first deselect all files and then
383			select the file you moved to.
384
385	root	1.61	=item Clicking
386	root	1.60
387	root	1.61	Clicking on an entry will select the one you clicked and deselect all
388			others.
389	root	1.60
390	root	1.61	=item Shift-Clicking
391
392			Shift-clicking will toggle the selection on the entry under the mouse.
393
394			=item Dragging
395	root	1.60
396			Dragging will select all entries between the one selected when pushing the
397			button and the one selected when releasing the button. If you move above
398			or below the schnauzer area while drag-selecting, the schnauzer will move
399			up/down one row twice per second. In addition, horizontal mouse movement
400			acts as a kind of invisible horizontal scrollbar.
401
402			=item Hint: double-click works while click-selecting
403
404			You can double-click any image while click-selecting to display it
405			without stopping the selection process. This will act as if you normally
406			double-clicked the image to display it, and will toggle the selection
407			twice, resulting in no change.
408
409			=back
410
411	root	1.47	=head1 FILES
412
413			When starting, CV runs the F<.cvrc> file in your F<$HOME> directory as if
414			it were a perl script. in that, you will mostly load plug-ins.
415
416			Example:
417
418			system "fping -q -t 10 ether"
419			or require "/fs/cv/cvplugin.pl";
420
421			This will load a plug-in, but only if the machine I<ether> is reachable
422			(supposedly the plug-in is networked in some way :).
423	root	1.11
424	root	1.27	=head1 ENVIRONMENT
425
426			=over 4
427
428	root	1.38	=item CV_EDITOR
429
430			The program that gets executed when the user presses C<CTRL-e> in the
431			Schnauzer or image window. The default is C<gimp>.
432
433	root	1.27	=item CV_PRINT_DESTINATION
434
435			The default (perl-style) destination to use in the print dialog.
436
437	root	1.38	=item CV_TRASHCAN
438
439			When set, must point to a directory where all files that are deleted are
440			moved to. If unset, files that are deleted are really being deleted.
441
442	root	1.27	=back
443
444	root	1.23	=head1 SECURITY CONSIDERATIONS
445
446	root	1.54	CV uses Pixbuf to load non-JPEG images. Pixbuf is not considered safe for
447			this purpose, though (from the gtk-2.2 release notes):
448	root	1.23
449			"While efforts have been made to make gdk-pixbuf robust against invalid
450			images, using gdk-pixbuf to load untrusted data is not recommended, due to
451			the likelyhood that there are additional problems where an invalid image
452			could cause gdk-pixbuf to crash or worse."
453
454	root	1.11	=head1 BUGS/TODO
455	root	1.23
456	root	1.47	Lots of functionality is missing.
457
458			Pixbuf doesn't always honor G_BROKEN_FILENAMES, so accessing files with
459	root	1.54	names incompatible with utf-8 might fail.
460	root	1.11
461			rotate on disk
462			lots of ui issues
463			save(?)
464			preferences
465
466			=head1 AUTHOR
467
468			Marc Lehmann <cv@plan9.de>.
469
470			=cut
471	root	1.1