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Next: <a rel="next" accesskey="n" href="stem_002dtremolo_002dinterface.fr.html#stem_002dtremolo_002dinterface">stem-tremolo-interface</a>,
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<h4 class="unnumberedsubsec">stem-interface</h4>
<p>The stem represents the graphical stem. In addition, it internally connects note heads, beams, and tremolos. Rests and whole notes have invisible stems.
<p>The following properties may be set in the <code>details</code> list.
<dl>
<dt><code>beamed-lengths</code><dd>List of stem lengths given beam multiplicity.
<br><dt><code>beamed-minimum-free-lengths</code><dd>List of normal minimum free stem lengths (chord to beams) given beam multiplicity.
<br><dt><code>beamed-extreme-minimum-free-lengths</code><dd>List of extreme minimum free stem lengths (chord to beams) given beam multiplicity.
<br><dt><code>lengths</code><dd>Default stem lengths. The list gives a length for each flag count.
<br><dt><code>stem-shorten</code><dd>How much a stem in a forced direction should be shortened. The list gives an amount depending on the number of flags and beams.
</dl>
<h5 class="unnumberedsubsubsec">User settable properties:</h5>
<blockquote>
<dl>
<dt><code>avoid-note-head</code> (boolean)<dd>If set, the stem of a chord does not
pass through all note heads, but starts at the last note head.
<br><dt><code>beaming</code> (pair)<dd>Pair of number lists. Each number list
specifies which beams to make. <code>0</code> is the central beam,
<code>1</code> is the next beam toward the note, etc. This
information is used to determine how to connect the beaming patterns
from stem to stem inside a beam.
<br><dt><code>default-direction</code> (direction)<dd>Direction determined by note head
positions.
<br><dt><code>direction</code> (direction)<dd>If <code>side-axis</code> is <code>0</code> (or
<code>#X</code>), then this property determines whether the object is placed
<code>#LEFT</code>, <code>#CENTER</code> or <code>#RIGHT</code> with respect to the
other object. Otherwise, it determines whether the object is placed
<code>#UP</code>, <code>#CENTER</code> or <code>#DOWN</code>. Numerical values may also
be used: <code>#UP</code>=<code>1</code>, <code>#DOWN</code>=<code>-1</code>,
<code>#LEFT</code>=<code>-1</code>, <code>#RIGHT</code>=<code>1</code>, <code>#CENTER</code>=<code>0</code>.
<br><dt><code>duration-log</code> (integer)<dd>The 2-log of the note head duration,
i.e., <code>0</code> = whole note, <code>1</code> = half note, etc.
<br><dt><code>flag-style</code> (symbol)<dd>A string determining what style of flag
glyph is typeset on a <code>Stem</code>. Valid options include <code>()</code>
and <code>mensural</code>. Additionally, <code>no-flag</code> switches off the
flag.
<br><dt><code>french-beaming</code> (boolean)<dd>Use French beaming style for this
stem. The stem stops at the innermost beams.
<br><dt><code>length</code> (dimension, in staff space)<dd>User override for the stem length of
unbeamed stems.
<br><dt><code>length-fraction</code> (number)<dd>Multiplier for lengths. Used for
determining ledger lines and stem lengths.
<br><dt><code>max-beam-connect</code> (integer)<dd>Maximum number of beams to connect
to beams from this stem. Further beams are typeset as beamlets.
<br><dt><code>neutral-direction</code> (direction)<dd>Which direction to take in the
center of the staff.
<br><dt><code>no-stem-extend</code> (boolean)<dd>If set, notes with ledger lines do not
get stems extending to the middle staff line.
<br><dt><code>stem-end-position</code> (number)<dd>Where does the stem end (the end is
opposite to the support-head)?
<br><dt><code>stemlet-length</code> (number)<dd>How long should a stem over a rest
be?
<br><dt><code>stroke-style</code> (string)<dd>Set to <code>"grace"</code> to turn stroke
through flag on.
<br><dt><code>thickness</code> (number)<dd>Line thickness, generally measured in
<code>line-thickness</code>.
</dl>
</blockquote>
<h5 class="unnumberedsubsubsec">Internal properties:</h5>
<blockquote>
<dl>
<dt><code>beam</code> (layout object)<dd>A pointer to the beam, if applicable.
<br><dt><code>details</code> (list)<dd>Alist of parameters for detailed grob behavior.
<p>More information on the allowed parameters can be found by inspecting
<samp><span class="file">lily/slur-scoring.cc</span></samp>, <samp><span class="file">lily/beam-quanting.cc</span></samp>, and
<samp><span class="file">lily/tie-formatting-problem.cc</span></samp>. Setting <code>debug-tie-scoring</code>,
<code>debug-beam-scoring</code> or <code>debug-slur-scoring</code> also provides
useful clues.
<br><dt><code>note-heads</code> (unknown)<dd>A list of note head grobs.
<br><dt><code>positioning-done</code> (boolean)<dd>Used to signal that a positioning element
did its job. This ensures that a positioning is only done once.
<br><dt><code>rests</code> (unknown)<dd>A list of rest objects.
<br><dt><code>stem-info</code> (pair)<dd>A cache of stem parameters.
<br><dt><code>tremolo-flag</code> (layout object)<dd>The tremolo object on a stem.
</dl>
</blockquote>
<p>This grob interface is used in the following graphical object(s): <a href="Stem.fr.html#Stem">Stem</a>.
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