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Ace/Graphics/Glyph.pm  view on Meta::CPAN

Retrieving information about the sequence:

=over 4

=item $start = $glyph->start

=item $end   = $glyph->end

These methods return the start and end of the glyph in base pair
units.

=item $offset = $glyph->offset

Returns the offset of the segment (the base pair at the far left of
the image).

=item $length = $glyph->length

Returns the length of the sequence segment.

=back


Retrieving formatting information:

=over 4

=item $top = $glyph->top

=item $left = $glyph->left

=item $bottom = $glyph->bottom

=item $right = $glyph->right

These methods return the top, left, bottom and right of the glyph in
pixel coordinates.

=item $height = $glyph->height

Returns the height of the glyph.  This may be somewhat larger or
smaller than the height suggested by the GlyphFactory, depending on
the type of the glyph.

=item $scale = $glyph->scale

Get the scale for the glyph in pixels/bp.

=item $height = $glyph->labelheight

Return the height of the label, if any.

=item $label = $glyph->label

Return a human-readable label for the glyph.

=back

These methods are called by Ace::Graphics::Track during the layout
process:

=over 4

=item $glyph->move($dx,$dy)

Move the glyph in pixel coordinates by the indicated delta-x and
delta-y values.

=item ($x1,$y1,$x2,$y2) = $glyph->box

Return the current position of the glyph.

=back

These methods are intended to be overridden in subclasses:

=over 4

=item $glyph->calculate_height

Calculate the height of the glyph.

=item $glyph->calculate_left

Calculate the left side of the glyph.

=item $glyph->calculate_right

Calculate the right side of the glyph.

=item $glyph->draw($gd,$left,$top)

Optionally offset the glyph by the indicated amount and draw it onto
the GD::Image object.


=item $glyph->draw_label($gd,$left,$top)

Draw the label for the glyph onto the provided GD::Image object,
optionally offsetting by the amounts indicated in $left and $right.

=back

These methods are useful utility routines:

=over 4

=item $pixels = $glyph->map_pt($bases);

Map the indicated base position, given in base pair units, into
pixels, using the current scale and glyph position.

=item $glyph->filled_box($gd,$x1,$y1,$x2,$y2)

Draw a filled rectangle with the appropriate foreground and fill
colors, and pen width onto the GD::Image object given by $gd, using
the provided rectangle coordinates.

=item $glyph->filled_oval($gd,$x1,$y1,$x2,$y2)