From 5cde47ecbd1c354f385bdcd8f86b0a2794c8ecfc Mon Sep 17 00:00:00 2001
From: martinahansen <martinahansen@74ccb610-7750-0410-82ae-013aeee3265d>
Date: Mon, 1 Mar 2010 14:58:51 +0000
Subject: [PATCH] added center navigation to BGB

git-svn-id: http://biopieces.googlecode.com/svn/trunk@880 74ccb610-7750-0410-82ae-013aeee3265d
---
 www/index.cgi | 70 ++++++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 67 insertions(+), 3 deletions(-)

diff --git a/www/index.cgi b/www/index.cgi
index faec6a5..81d133c 100755
--- a/www/index.cgi
+++ b/www/index.cgi
@@ -125,6 +125,7 @@ sub cookie_default
     $cookie->{ 'Q_ID' }            = $cgi->param( 'q_id' );
     $cookie->{ 'NAV_START' }     ||= $cgi->param( 'nav_start' ) || $cgi->param( 's_beg' );  # FIXME this is ugly!
     $cookie->{ 'NAV_END' }       ||= $cgi->param( 'nav_end' )   || $cgi->param( 's_end' );
+    $cookie->{ 'NAV_CENTER' }      = $cgi->param( 'nav_center' );
     $cookie->{ 'S_BEG' }           = $cgi->param( 's_beg' );
     $cookie->{ 'S_END' }           = $cgi->param( 's_end' );
     $cookie->{ 'STRAND' }          = $cgi->param( 'strand' );
@@ -179,6 +180,7 @@ sub cookie_default
         cookie_end( $cookie );
         cookie_zoom( $cookie );
         cookie_move( $cookie );
+        cookie_center( $cookie );
     }
 
     $cookie->{ 'STRAND' } = '+' if defined $cookie->{ 'STRAND' } and $cookie->{ 'STRAND' } eq ' ';   # FIXME ugly HTML fix
@@ -381,6 +383,8 @@ sub cookie_move
     my ( $cookie,   # cookie hash
        ) = @_;
 
+    # Returns nothing.
+    
     my ( $max, $dist, $shift, $new_start, $new_end );
 
     $max = Maasha::Filesys::file_size( Maasha::BGB::Track::path_seq( $cookie ) );
@@ -415,6 +419,34 @@ sub cookie_move
 }
 
 
+sub cookie_center
+{
+    # Martin A. Hansen, March 2010
+   
+    # Adjust the cookie values for NAV_START and NAV_END based
+    # on cookie CENTER value if defined.
+
+    my ( $cookie,   # cookie hash
+       ) = @_;
+
+    # Returns nothing.
+
+    my ( $l_dist, $r_dist );
+
+    if ( defined $cookie->{ 'NAV_CENTER' } )
+    {
+        $l_dist = $cookie->{ 'NAV_CENTER' } - $cookie->{ 'NAV_START' };
+        $r_dist = $cookie->{ 'NAV_END' } - $cookie->{ 'NAV_CENTER' };
+
+        if ( $l_dist > $r_dist ) {
+            $cookie->{ 'NAV_START' } = $cookie->{ 'NAV_END' } - 2 * $r_dist;
+        } else {
+            $cookie->{ 'NAV_END' } = $cookie->{ 'NAV_START' } + 2 * $l_dist;
+        }
+    }
+}
+
+
 sub cookie_href
 {
     # Martin A. Hansen, November 2009.
@@ -812,7 +844,7 @@ sub section_browse
 
     # Returns a list.
 
-    my ( @tracks, $i, @features, $feat, $elem, $surface, $cr, $png_data, @html, @img );
+    my ( @tracks, $i, @features, $feat, $elem, $surface, $cr, $png_data, @html, @img, $x1, $y1, $x2, $y2, $factor, $center );
 
     push @features, [ Maasha::BGB::Track::track_ruler( $cookie ) ];
     push @features, [ Maasha::BGB::Track::track_seq( $cookie ) ];
@@ -867,12 +899,44 @@ sub section_browse
             push @img, Maasha::XHTML::area(
                 href   => cookie_href( $cookie, "export" ),
                 # href   => cookie_href( $cookie, "export" ) . "&q_id=$elem->{ 'q_id' }&s_beg=$elem->{ 's_beg' }&s_end=$elem->{ 's_end' }&strand=$elem->{ 'strand' }",
-                shape  => "rect",
-                coords => "$elem->{ x1 }, $elem->{ y1 }, $elem->{ x2 }, $elem->{ y2 }", title => "$elem->{ 'title' }",
+                shape  => 'rect',
+                coords => "$elem->{ x1 }, $elem->{ y1 }, $elem->{ x2 }, $elem->{ y2 }",
+                title  => "$elem->{ 'title' }",
             );
         }
     }
 
+    $factor = $cookie->{ 'IMG_WIDTH' } / ( $cookie->{ 'NAV_END' } - $cookie->{ 'NAV_START' } + 1 );
+    $factor = ( $cookie->{ 'NAV_END' } - $cookie->{ 'NAV_START' } + 1 ) / $cookie->{ 'IMG_WIDTH' };
+
+    for ( $i = 0; $i < $cookie->{ 'IMG_WIDTH' }; $i += 5 )
+    {
+        $x1 = $i;
+        $y1 = 10;
+        $x2 = $i + 5;
+        $y2 = 20;
+
+        $center = int( $cookie->{ 'NAV_START' } + $factor * $i );
+
+        push @img, Maasha::XHTML::area(
+            # href   => cookie_href( $cookie, "browse" ) . "&nav_start=$cookie->{ 'NAV_START' }&nav_end=$cookie->{ 'NAV_END' }&nav_center=$center",
+            href     => join( "&", "$cookie->{ 'SCRIPT' }?page=browse",
+                                   "session_id=$cookie->{ 'SESSION_ID' }",
+                                   "user=$cookie->{ 'USER' }",
+                                   "clade=$cookie->{ 'CLADE' }",
+                                   "genome=$cookie->{ 'GENOME' }",
+                                   "contig=$cookie->{ 'CONTIG' }",
+                                   "assembly=$cookie->{ 'ASSEMBLY' }",
+                                   "nav_start=$cookie->{ 'NAV_START' }",
+                                   "nav_end=$cookie->{ 'NAV_END' }",
+                                   "nav_center=$center",
+                      ),
+            shape  => 'rect',
+            coords => "$x1, $y1, $x2, $y2",
+            title  => "Center on " . Maasha::Calc::commify( $center ),
+        );
+    }
+
     push @img, Maasha::XHTML::map_end();
 
     push @html, Maasha::XHTML::p( txt => join( "\n", @img ) );
-- 
2.39.5