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#!/usr/local/bin/perl -w
package PDL::IO::HDF5::tkview;
# Experimental module to view HDF5 using perl/tk and PDL::IO::HDF5 modules
use Tk 800;
use Tk::Tree;
use IO::File;
=head1 NAME
PDL::IO::HDF5::tkview - View HDF5 files using perl/tk and PDL::IO::HDF5 modules
=head1 DESCRIPTION
This is a experimental object to view HDF5 files the PDL::IO::HDF5 module.
The HDF files are displayed in a tree structure using Tk::Tree
=head1 SYNOPSIS
use Tk;
use PDL::IO::HDF5::tkview
use PDL::IO::HDF5;
my $mw = MainWindow->new;
my $h5 = new PDL::IO::HDF5('datafile.h5'); # open HDF5 file object
my $tkview = new PDL::IO::HDF5::tkview( $mw, $h5);
MainLoop;
=head1 MEMBER DATA
=over 1
=item mw
Tk window where the file structure is displayed.
=item H5obj
PDL::IO::HDF5 Object
=item hl
Tk Hlist object
=item dataDisplaySub
Sub ref to execute when a dataset is double-clicked. This defaults to a print of the dataset. See
L<dataDisplaySubSet> for details.
Tk Hlist object
=back
=head1 METHODS
####---------------------------------------------------------
=head2 new
=for ref
PDL::IO::HDF5::tkview Constructor - creates new object
B<Usage:>
=for usage
$tkview = new PDL::IO::HDF5::tkview( $mw, $H5obj);
Where:
$mw Tk window
$H5obj PDL::IO::HDF5::Object
=cut
# Cube Image Pixmap (ppm) format. raw data string
$cubeImage =
'/* XPM */
static char * cube_xpm[] = {
"12 12 3 1",
" c #FFFFFFFFFFFF",
". c #000000000000",
"X c #FFFFFFFF0000",
" ........",
" .XXXXXX..",
" .XXXXXX.X.",
" ........XX.",
" .XXXXXX.XX.",
" .XXXXXX.XX.",
" .XXXXXX.XX.",
" .XXXXXX.XX.",
" .XXXXXX.X. ",
" .XXXXXX.. ",
" ........ ",
" "};';
# -----------------------------------------------
# Routine to create the array_display window
sub new{
my $type = shift; # get the class type
my $mw = $_[0];
my $H5obj = $_[1];
my $self = {};
# setup member variables:
$self->{mw} = $mw;
$self->{H5obj} = $H5obj;
bless $self, $type;
# setup the window
if (defined $H5obj){
my $hl = $mw->Scrolled('Tree',-separator => $;,-drawbranch => 1, -width => '15', -bg => 'white');
$hl->configure(-opencmd => [\&More,$self, $hl]);
$hl->configure(-command => [\&activateCmd,$self]); # command to called when entry double-clicked
my $name = $H5obj->filename;
$hl->add($name, -text => $name, -data => $H5obj, -itemtype => 'imagetext');
$hl->setmode($name => 'close');
# Get Images for display
$self->{groupImage} = $mw->Pixmap(-file => Tk->findINC('winfolder.xpm') );
$self->{cubeImage} = $mw->Pixmap(-data => $cubeImage );
AddChildren($self,$hl,$name,$H5obj);
$hl->pack(-expand=> 1, -fill => 'both');
$self->{hl} = $hl;
# Set Default dataDisplaySub
$self->{dataDisplaySub} = sub{ print $_[0]};
}
return $self;
}
# sub to add elements to the hlist after an element in the list has been expanded (i.e. clicked-on)
sub AddChildren
{
my $self = shift;
my ($hl,$path,$data) = @_; # hl list object, location, data
my $w;
my $name;
my $text;
if( ref($data) =~ /Group/ || !($path =~ /$;/ ) ){ # Current Item to expand is a group or top level of file
# Display any Attributes First:
my @attrs; # attributes stored
my %attrs;
@attrs = sort $data->attrs;
if( @attrs){ # set attribute hash if there are attributes
@attrs{@attrs} = $data->attrGet(@attrs); # attrget not defined yet
}
my ($attr, $attrValue);
foreach $attr(@attrs){ # add each attribute to the display
$attrValue = $attrs{$attr};
$text = "$attr: $attrValue";
$hl->add("$path$;"."_Attr$attr", -text => $text, -data => $attrValue);
}
# Display Datasets next:
my @datasets; # dataset names stored
@datasets = sort $data->datasets; # get list of datasets in the current group/file
my ($dataset, @dims);
foreach $dataset(@datasets){ # add each attribute to the display
my $datasetData = $data->dataset($dataset);
@dims = $datasetData->dims; # get the dims of the dataset
if( @dims){ # > 0-dimensional dataset
$text = "$dataset: Dims ".join(", ",@dims);
}
else{ # zero-dimensional dataset
$text = "$dataset: ".$datasetData->get;
}
$hl->add("$path$;"."_Dset$dataset", -image => $self->{cubeImage}, -text => $text, -data => $data);
}
# Display Groups Next
my @groups; # groups stored
@groups = sort $data->groups;
my ($group, $groupName);
foreach $groupName(@groups){ # Add each group to the display
# data element is the parent object and the group name.
$hl->add("$path$;"."_Group$groupName", -image => $self->{groupImage}, -text => $groupName, -data => [ $data,$groupName] );
$hl->setmode( "$path$;"."_Group$groupName", "open");
}
}
}
# This Sub called when a element of the H-list is expanded/collapsed. (i.e. clicked-on)
sub More
{
my $self = shift;
my ($w,$item) = @_; # hl list object, hlist item name
if( defined $w->info('children',$item) > 0){ #get rid of old elements if it has already been opened
# print "Has children\n";
$w->delete('offsprings',$item);
}
# print "item = $item\n";
my $data = $w->entrycget($item,'-data'); #get the data ref for this entry
my @levels = split($;,$item);
if( @levels && ( $levels[-1] =~ /^_Group/) ){ # if this is a group then get the group object
my ($obj, $groupName) = @$data;
$data = $obj->group($groupName);
}
$self->AddChildren($w,$item,$data);
}
=head2 dataDisplaySubSet
=for ref
Set the dataDisplaySub data member.
B<Usage:>
=for usage
# Data Display sub to call when a dataset is double-clicked
my $dataDisplay = sub{ my $data = $_[0]; print "I'm Displaying This $data\n";};
$tkview->dataDisplaySubSet($dataDisplay);
The dataDisplaySub data member is a perl sub ref that is called when a dataset is double-clicked.
This data member is initially set to just print the dataset's data to the command line. Using the L<dataDisplaySubSet>
method, different actions for displaying the data can be "plugged-in".
=cut
sub dataDisplaySubSet {
my ($self, $subref) = @_;
$self->{dataDisplaySub} = $subref;
}
#-------------------------------------------------------------------
=head2 activateCmd
=for ref
Internal Display method invoked whenever a tree element is activated (i.e.
double-clicked). This method does nothing unless a dataset element has been
selected. It that cases it calls $self->dataDisplaySub with the data.
=cut
sub activateCmd{
my $self = shift;
my ($name) = (@_); # Name of the hlist element that was selected
return unless($name =~ /$;_Dset(.+)$/); # only process datasets
my $datasetName = $1;
my $hlist = $self->{hl};
my $group = $hlist->entrycget($name,'-data');
my $PDL = $group->dataset($datasetName)->get;
my $dataDisplaySub = $self->{dataDisplaySub};
&$dataDisplaySub($PDL)
}
1;