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# IGraph R package
# Copyright (C) 2009-2012 Gabor Csardi <csardi.gabor@gmail.com>
# 334 Harvard street, Cambridge, MA 02139 USA
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301 USA
#
###################################################################
proc render_real {win href} {
global tkigraph_help_root
set Url $tkigraph_help_root/$href
$win configure -state normal
HMreset_win $win
HMparse_html [get_html $Url] "HMrender $win"
$win tag add indented 1.0 insert
$win tag configure indented -lmargin1 20 -lmargin2 20
$win configure -state disabled
update
}
proc render {win href} {
global tkigraph_help_history tkigraph_help_history_pos
global browser_button browser_url
if { [ regexp ^http:// "$href" ] } {
set browser_url $href
$browser_button invoke
return
}
lappend tkigraph_help_history($win) $href
incr tkigraph_help_history_pos($win)
render_real $win $href
}
proc start_history {win} {
global tkigraph_help_history tkigraph_help_history_pos
set tkigraph_help_history($win) [ list ]
set tkigraph_help_history_pos($win) -1
}
proc render_back {win} {
global tkigraph_help_history tkigraph_help_history_pos
if { $tkigraph_help_history_pos($win) > 0 } {
set pos [ incr tkigraph_help_history_pos($win) -1 ]
render_real $win [ lindex $tkigraph_help_history($win) $pos ]
}
}
proc render_forw {win} {
global tkigraph_help_history tkigraph_help_history_pos
if { [ expr $tkigraph_help_history_pos($win) + 1 ] <
[ llength $tkigraph_help_history($win) ] } {
set pos [ incr tkigraph_help_history_pos($win) ]
render_real $win [ lindex $tkigraph_help_history($win) $pos ]
}
}
proc HMlink_callback {win href} {
render $win $href
}
proc get_html {file} {
global tkigraph_help_root
if {[catch {set fd [open $file]} msg]} {
return "
<title>Bad file $file</title>
<h1>Error reading $file</h1><p>
$msg<hr>
<a href=$tkigraph_help_root>Go home</a>
"
}
set result [read $fd]
close $fd
return $result
}
proc HMset_image {win handle src} {
global tkigraph_help_root
set image $tkigraph_help_root/$src
update
if {[string first " $image " " [image names] "] >= 0} {
HMgot_image $handle $image
} else {
set type photo
if {[file extension $image] == ".bmp"} {set type bitmap}
catch {image create $type $image -file $image} image
HMgot_image $handle $image
}
}
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