Gtk2-Ex-Geo-Graph

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lib/Gtk2/Ex/Geo/Graph.pm  view on Meta::CPAN

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            $miny = min($miny, $v->{point}->{Y});
            $maxx = max($maxx, $v->{point}->{X});
            $maxy = max($maxy, $v->{point}->{Y});
        }
    }
    return ($minx, $miny, $maxx, $maxy) if defined $minx;
    return ();
}
 
sub render {
    my($self, $pb, $cr, $overlay, $viewport) = @_;
 
    my @s = @{$self->selected_features()};
    my %selected = map { (ref($_) eq 'HASH' ? $_ : $_->[0].$_->[1] ) => 1 } @s;
 
    my $a = $self->alpha/255.0;
    my @color = $self->single_color;
    for (@color) {
        $_ /= 255.0;
        $_ *= $a;
    }
 
    $cr->set_line_width(1);
    $cr->set_source_rgba(@color);
     
    for my $v ($self->{graph}->vertices) {
        my @p = $overlay->point2surface($v->{point}->{X}, $v->{point}->{Y});
        for (@p) {
            $_ = bounds($_, -10000, 10000);
        }
        $cr->arc(@p, $NODE_RAY, 0, 2*3.1415927);
        $cr->fill_preserve if $selected{$v};
        $cr->stroke;
    }
    for my $e ($self->{graph}->edges) {
        my($u, $v) = @$e;
        my @p = $overlay->point2surface($u->{point}->{X}, $u->{point}->{Y});
        my @q = $overlay->point2surface($v->{point}->{X}, $v->{point}->{Y});
        for (@p, @q) {
            $_ = bounds($_, -10000, 10000);
        }
        $cr->move_to(@p);
        $cr->line_to(@q);
        $cr->set_line_width(3) if $selected{$u.$v};
        $cr->stroke;
        $cr->set_line_width(1) if $selected{$u.$v};
    }
    

lib/Gtk2/Ex/Geo/Graph.pm  view on Meta::CPAN

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sub nodes_selected {
    my($selection) = @_;
    my($self, $gui) = @{pop()};
    return if $self->{ignore_cursor_change};
    my $selected = get_selected_from_selection($selection);
    $self->select();
    for my $v ($self->{graph}->vertices) {
        push @{$self->selected_features}, $v if $selected->{$v->{index}};
    }
    $gui->{overlay}->render;
}
 
sub open_links_dialog {
    my($self, $gui) = @{pop()};
    my $dialog = Gtk2::Dialog->new('Nodes of '.$self->name, undef, [], 'gtk-close' => 'close');
    $dialog->set_default_size(600, 500);
    $dialog->set_transient_for(undef);
    $dialog->signal_connect(response => sub { $_[0]->destroy });
    $dialog->show_all;
}
 
sub bounds {
    $_[0] < $_[1] ? $_[1] : ($_[0] > $_[2] ? $_[2] : $_[0]);
}
 
sub got_focus {
    my($self, $gui) = @_;
    my $o = $gui->{overlay};
    $self->{_tag1} = $o->signal_connect(
        drawing_changed => \&drawing_changed, [$self, $gui]);
    $self->{_tag2} = $o->signal_connect(
        new_selection => \&new_selection, [$self, $gui]);
    $self->{_tag3} = $o->signal_connect(
        key_press_event => \&key_pressed, [$self, $gui]);
    $gui->set_interaction_mode('Draw');
    $gui->set_interaction_geometry('Line');
    $o->{show_selection} = 0;
}
 
sub lost_focus {
    my($self, $gui) = @_;
    for (qw/_tag1 _tag2 _tag3/) {
        $gui->{overlay}->signal_handler_disconnect($self->{$_}) if $self->{$_};
        delete $self->{$_};
    }
}
 
sub drawing_changed {
    my($self, $gui) = @{$_[1]};
    my $drawing = $gui->{overlay}->{drawing};
    if ($drawing->isa('Geo::OGC::LineString') and $drawing->NumPoints == 2) {
        my $v1 = $self->find_vertex($gui, $drawing->StartPoint);
        my $v2 = $self->find_vertex($gui, $drawing->EndPoint);
        unless ($v1) {
            $v1 = { point => $drawing->StartPoint->Clone };
            $v1->{index} = $self->{index}++;
            $self->{graph}->add_vertex($v1);
        }
        unless ($v2) {
            $v2 = { point => $drawing->EndPoint->Clone };
            $v2->{index} = $self->{index}++;
            $self->{graph}->add_vertex($v2);
        }
        my $w = $drawing->Length;
        $self->{graph}->add_weighted_edge($v1, $v2, $w);
    }
    delete $gui->{overlay}->{drawing};
    $gui->{overlay}->render;
}
 
sub find_vertex {
    my($self, $gui, $point) = @_;
    my $d = -1;
    my $c;
    for my $v ($self->{graph}->vertices) {
        my $e = $point->Distance($v->{point});
        ($c, $d) = ($v, $e) if $d < 0 or $e < $d;
    }
    return $c if $d/$gui->{overlay}->{pixel_size} < $NODE_RAY;
}
 
sub find_edge {
    my($self, $gui, $point) = @_;
    my $d = -1;
    my $c;
    for my $e ($self->{graph}->edges) {
        my $e2 = Geo::OGC::LineString->new;
        $e2->AddPoint($e->[0]->{point});
        $e2->AddPoint($e->[1]->{point});
        my $d2 = $point->Distance($e2);
        ($c, $d) = ($e, $d2) if $d < 0 or $d2 < $d;
    }
    return $c if $d/$gui->{overlay}->{pixel_size} < $NODE_RAY;
}
 
sub new_selection {
    my($self, $gui) = @{$_[1]};
    my $selection = $gui->{overlay}->{selection};
    $self->select();
    $self->_select($gui, $selection);
    if ($self->{nodes_dialog}) {
        my $view = $self->{nodes_view};
        my $model = $view->get_model;
        my $selection = $view->get_selection;
        $self->{ignore_cursor_change} = 1;
        $selection->unselect_all;
        for my $v (@{$self->selected_features}) {
            next if ref($v) eq 'ARRAY';
            $model->foreach( \&select_in_selection, [$selection, $v->{index}]);
             
        }
        delete $self->{ignore_cursor_change};
    }
    $gui->{overlay}->render;
}
 
sub select_in_selection {
    my($selection, $index) = @{pop()};
    my($model, $path, $iter) = @_;
    my($x) = $model->get($iter);
    if ($x == $index) {
        $selection->select_iter($iter);
        return 1;
    }

lib/Gtk2/Ex/Geo/Graph.pm  view on Meta::CPAN

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        my $v = $self->find_vertex($gui, $selection);
        push @{$self->selected_features}, $v if $v;
        unless ($v) {
            my $e = $self->find_edge($gui, $selection);
            push @{$self->selected_features}, $e if $e;
        }
    }
}
 
sub key_pressed {
    my($overlay, $event, $user) = @_;
    my $key = $event->keyval;
    return unless $key == $Gtk2::Gdk::Keysyms{Delete};
    my($self, $gui) = @{$user};
    my @v;
    my @e;
    for my $v (@{$self->selected_features()}) {
        if (ref $v eq 'HASH') {
            push @v, $v;
        } else {
            push @e, ($v->[0], $v->[1]);
        }
    }
    $self->{graph}->delete_vertices(@v);
    $self->{graph}->delete_edges(@e);
    $self->select();
    $gui->{overlay}->render;
}
 
sub open_properties_dialog {
    my($self, $gui) = @_;
}
 
sub shortest_path {
    my($self) = @_;
    my($u, $v);
    for my $x (@{$self->selected_features()}) {

lib/Gtk2/Ex/Geo/Graph.pm  view on Meta::CPAN

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        $u = $x,next unless $u;
        $v = $x unless $v;
        last;
    }
    $self->select();
    return unless $u and $v;
    print STDERR "sp $u->$v\n";
    my @path = $self->{graph}->SP_Dijkstra($u, $v);
    print STDERR "sp @path\n";
    $self->selected_features(\@path);
    #$gui->{overlay}->render;
}
 
## @ignore
sub min {
    $_[0] > $_[1] ? $_[1] : $_[0];
}
 
## @ignore
sub max {
    $_[0] > $_[1] ? $_[0] : $_[1];

t/00.t  view on Meta::CPAN

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use Gtk2::Ex::Geo;
 
BEGIN { 
    use_ok('Gtk2::Ex::Geo::Graph');
};
 
Gtk2->init;
 
my($window, $gis) = setup (classes => [qw/Gtk2::Ex::Geo::Layer Gtk2::Ex::Geo::Graph/]);
 
$gis->{overlay}->signal_connect(update_layers => 
        sub {
        #print STDERR "in callback: @_\n";
        });
 
exit unless $ENV{GUI};
 
Gtk2->main;
 
sub setup{
    my %params = @_;

t/00.t  view on Meta::CPAN

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}
 
# layer list
my $list = Gtk2::ScrolledWindow->new();
$list->set_policy("never", "automatic");
$list->add($gis->{tree_view});
 
# layer list and the map
my $hbox = Gtk2::HBox->new(FALSE, 0);
$hbox->pack_start($list, FALSE, FALSE, 0);
$hbox->pack_start($gis->{overlay}, TRUE, TRUE, 0);
 
# the stack
my $vbox = Gtk2::VBox->new(FALSE, 0);
$vbox->pack_start($gis->{toolbar}, FALSE, FALSE, 0);
#$vbox->add($hbox);
$vbox->pack_start($hbox, TRUE, TRUE, 0);
$vbox->pack_start($gis->{entry}, FALSE, FALSE, 0);
$vbox->pack_start($gis->{statusbar}, FALSE, FALSE, 0);
 
$window->add($vbox);