157 lines
3.3 KiB
Perl
157 lines
3.3 KiB
Perl
package WebGUI::Image::Graph::XYGraph::Line;
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use strict;
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use WebGUI::Image::Graph::XYGraph;
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use List::Util;
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use POSIX;
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our @ISA = qw(WebGUI::Image::Graph::XYGraph);
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#-------------------------------------------------------------------
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=head1 drawGraph
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Draws all the lines.
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=cut
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sub drawGraph {
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my ($currentBar, %location);
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my $self = shift;
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$self->processDataSet;
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my $numberOfGroups = List::Util::max(map {scalar @$_} @{$self->{_datasets}});
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my $interval = $self->getChartWidth / ($numberOfGroups - 1);
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%location = %{$self->getChartOffset};
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$location{y} += $self->getChartHeight;
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foreach (@{$self->{_lines}}) {
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$self->drawLine($_, \%location, $interval);
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}
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}
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#-------------------------------------------------------------------
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=head1 drawLine ( line, location, interval )
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Draws a bar defined by bar and with width barWidth at location.
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=head2 line
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A hashref defining the line. Must contain keys 'strokeColor' and
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'dataset', the latter one being an arrayref containing all points of the line.
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=head2 location
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A hashref containing the location of the bottom-left corner of the line's
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origin. Keys 'x' and 'y' must specify the x- and y-coordinates respectively.
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=head2 interval
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The distance between x-axis anchors in pixels.
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=cut
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sub drawLine {
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my $self = shift;
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my $line = shift;
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my $location = shift;
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my $interval = shift;
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my %currentLocation = %$location;
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my $dataCounter;
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my $path;# = " M ".$currentLocation{x}.",".$currentLocation{y};
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foreach (@{$line->{dataset}}) {
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$path .= ($dataCounter++) ? " L " : " M ";
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$path .= $currentLocation{x}.",".($currentLocation{y} - $_*$self->getPixelsPerUnit);
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$currentLocation{x} += $interval;
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}
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$self->image->Draw(
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primitive => 'Path',
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stroke => $line->{strokeColor},
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points => $path,
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fill => 'none',
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);
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}
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#-------------------------------------------------------------------
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=head1 formNamespace
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Returns the form namespace of this plugin. See WegBUI::Image::Graph for
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more elaborate information.
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=cut
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sub formNamespace {
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my $self = shift;
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return $self->SUPER::formNamespace.'_Line';
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}
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#-------------------------------------------------------------------
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=head1 getAnchorSpacing
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Returns the distance in pixels between two anchors on the x axis that define teh
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placement of bars and labels.
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=cut
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sub getAnchorSpacing {
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my $self = shift;
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my $numberOfGroups = List::Util::max(map {scalar @$_} @{$self->getDataset});
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my $spacing = $self->getChartWidth / ($numberOfGroups - 1);
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return {
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x => $spacing,
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y => 0,
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};
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}
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#-------------------------------------------------------------------
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=head1 getFirstAnchorLocation
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Returns a hashref containing the location of the leftmost x-axis anchor.
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Location coordinates are encoded in keys 'x' and 'y'.
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=cut
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sub getFirstAnchorLocation {
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my $self = shift;
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return {
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x => $self->getChartOffset->{x},
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y => $self->getChartOffset->{y} + $self->getChartHeight
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}
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}
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#-------------------------------------------------------------------
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=head1 processDataset
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Processes the dataset. Used by drawGraph.
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=cut
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sub processDataSet {
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my ($barProperties);
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my $self = shift;
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my $palette = $self->getPalette;
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foreach (@{$self->{_datasets}}) {
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push (@{$self->{_lines}}, {
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dataset => $_,
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strokeColor => $palette->getColor->getStrokeColor,
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});
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$palette->getNextColor;
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}
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}
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1;
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