...
This
...
is
...
where
...
we
...
define
...
the
...
chart
...
DOM
...
for
...
the
...
new
...
API.
...
Not
...
necessarily
...
a
...
starting
...
point
...
for
...
developing
...
the
...
new
...
API,
...
but
...
a
...
point
...
of
...
many
...
discussions
...
around
...
which
...
we
...
can
...
easily
...
think
...
we
...
are
...
talking
...
about
...
the
...
same
...
thing
...
until
...
in
...
the
...
details
...
we
...
unwittingly
...
deviate.
...
After
...
looking
...
at
...
the
...
JFreeReport
...
flow
...
engine's
...
DOM,
...
there
...
is
...
a
...
nice
...
pattern
...
we
...
can
...
reuse
...
in
...
the
...
chart
...
DOM
...
regarding
...
how
...
style
...
are
...
applied
...
to
...
chart
...
structure.
...
This
...
my
...
first
...
quick
...
attempt
...
at
...
putting
...
out
...
an
...
example
...
XML
...
structure
...
with
...
a
...
few
...
styles
...
defined
...
so
...
that
...
we
...
can
...
begin
...
to
...
visualize
...
the
...
ideas
...
that
...
we
...
are
...
talking
...
about.
...
| Code Block |
|---|
<chart xmlns="http://www.pentaho.org/namespaces/chart"> <inline-stylesheet> axis { color: #FFF000; font-family: sans-serif; } axis label { font-weight: bold; } axis[type="numeric"] { format: "#.00%"; } } axis[type="datetime"] { format: "MM/dd hh:mm a"; } } axis.myAxis { color: blue; font-family: "Comic Sans MS"; } } </inline-stylesheet> </inline-stylesheet> <plot></plot> <plot/> <axis type="numeric" id="y1" position="left"> <!-- This label represents the title for the axis --> <label></label> <label/> </axis> <axis class="myAxis" type="numeric" id="y2" position="right"> <!-- This label represents the title for the axis --> <label></label> <label/> </axis> <axis type="datetime" id="x1" position="bottom"> <!-- This label represents the title for the axis --> <label></label> <label/> </axis> <legend></legend><legend/> <title></title> <subtitles> <subtitles></subtitles> <subtitles></subtitles> </subtitles> <chart-series> <title/> <subtitles> <subtitle></subtitle> <subtitle></subtitle> </subtitles> <chart-series> <series id="" position="0" axis="y1"></series> <series id="" position="1" axis="y2"></series> </chart-series> <annotations> <annotation></annotation> </annotations> <intervals> <intervals> <interval></interval> </intervals> </chart> }} |
I
...
would
...
like
...
to
...
work
...
toward
...
either
...
a
...
schema
...
or
...
a
...
DTD
...
that
...
all
...
projects
...
can
...
work
...
from
...
in
...
tandem
...
to
...
realize
...
the
...
chart
...
API,
...
pillar
...
integration
...
and
...
editors.
...
Notes
...
from
...
Gretchen's
...
head:
...
- Keep
...
- the
...
- elements
...
- in
...
- the
...
- chart
...
- model
...
- decoupled,
...
- only
...
- referencing
...
- relationships
...
- via
...
- attributes.
...
- This
...
- buys
...
- us
...
- flexibility
...
- in
...
- the
...
- implementation
...
- and
...
- easier
...
- changes
...
- to
...
- the
...
- DOM
...
- when
...
- charts
...
- are
...
- rendered
...
- and
...
- changed
...
- dynamically
...
- (ie.,
...
- drill
...
- down,
...
- chart
...
- editor
...
- design).
...
- Implementation:
...
- each
...
- element
...
- in
...
- the
...
- DOM
...
- is
...
- a
...
- separate
...
- Bean.
...
- Allows
...
- for
...
- building
...
- complex
...
- chart
...
- templates
...
- on
...
- the
...
- fly
...
- without
...
- data,
...
- or
...
- with
...
- a
...
- small
...
- sample
...
- dataset.
...
- The
...
- DOM
...
- should
...
- be
...
- structural
...
- ,
...
- without
...
- dependencies
...
- on
...
- the
...
- data
...
- or
...
- presentation
...
- attributes.
...
- Not
...
- sure
...
- yet
...
- how
...
- we
...
- validate
...
- the
...
- structure
...
- against
...
- the
...
- data.
...
- Styling
...
- shouldn't
...
- need
...
- validation
...
- against
...
- the
...
- structure
...
- (ie.,
...
- styles
...
- are
...
- ignored
...
- that
...
- don't
...
- relate
...
- to
...
- any
...
- defined
...
- structural
...
- element.
...
- Simple
...
- charts
...
- should
...
- not
...
- need
...
- to
...
- store
...
- a
...
- fully
...
- defined
...
- DOM.
...
- We
...
- can
...
- make
...
- assumptions
...
- based
...
- on
...
- what
...
- we
...
- know
...
- about
...
- categorical
...
- charts,
...
- line
...
- ccharts,
...
- pie
...
- charts,
...
- etc.
...
- (This
...
- is
...
- iffy).
...
Notes
...
from
...
Dr.
...
Evil:
...
- Implementation:
...
- For
...
- the
...
- Top-Level
...
- chart-API
...
- stick
...
- with
...
- a
...
- more
...
- generic
...
- approach.
...
- We
...
- cannot
...
- know
...
- the
...
- numbers
...
- or
...
- types
...
- of
...
- attributes
...
- and
...
- or
...
- the
...
- elements
...
- that
...
- a
...
- certain
...
- chart
...
- is
...
- made
...
- of.
...
- In
...
- the
...
- flow-engine
...
- I
...
- kept
...
- elements
...
- very
...
- generic
...
- which
...
- then
...
- resulted
...
- in
...
- the
...
- most
...
- minimalistic
...
- interface:
| Code Block |
|---|
interface Element { Object getAttribute(String namespace, String attributeName); String getNamespace(); String getTagName(); StyleSheet getStyle(); } |
This
...
is
...
enough
...
to
...
allow
...
a
...
full
...
style-resolution
...
and
...
to
...
code
...
renderers
...
for
...
the
...
model.
...
The
...
Beans
...
should
...
sit
...
on
...
top
...
of
...
this
...
interface
...
providing
...
programmers
...
with
...
getters
...
and
...
setters.
...
The
...
resulting
...
DOM-model
...
will
...
be
...
able
...
to
...
provide
...
extra
...
attributes
...
for
...
specific
...
renderers
...
without
...
extra
...
coding
...
and
...
reduces
...
the
...
number
...
of
...
conflicts
...
caused
...
by
...
the
...
limitations
...
of
...
the
...
bean
...
interfaces.
...
The
...
strict-typing
...
of
...
beans
...
actually
...
backfires
...
once
...
you
...
try
...
to
...
implement
...
the
...
"chart-type-switching".
...
- Structural
...
- DOM:
...
- 100%
...
- ack.
...
- Giving
...
- your
...
- example
...
- above,
...
- the
...
- DOM
...
- would
...
- act
...
- as
...
- a
...
- template
...
- for
...
- the
...
- actual
...
- chart-rendering.
...
- A
...
- DOM
...
- that
...
- has
...
- no
...
- axises
...
- defined
...
- (but
...
- requires
...
- one)
...
- will
...
- have
...
- to
...
- (a)
...
- autogenerate
...
- the
...
- axises
...
- before
...
- attempting
...
- to
...
- style
...
- them
...
- or
...
- (b)
...
- rely
...
- on
...
- the
...
- chart-normalization
...
- to
...
- auto-generate
...
- missing
...
- elements.
...
Actually,
...
along
...
with
...
your
...
next
...
point
...
"Simple
...
charts
...
need
...
simple
...
DOMs",
...
this
...
road
...
leads
...
to
...
the
...
common
...
separation
...
between
...
the
...
user-model
...
and
...
the
...
normalized
...
display-model.
...
So
...
the
...
display-model
...
that
...
is
...
passed
...
to
...
the
...
renderers
...
should
...
be
...
structural
...
and
...
complete
...
(whatever
...
that
...
will
...
mean
...
to
...
us
...
)
...
while
...
the
...
user-model
...
will
...
alway
...
be
...
incomplete
...
and
...
possibly
...
even
...
full
...
of
...
errors.
...
Its
...
the
...
normalizer's
...
job
...
to
...
sort
...
it
...
out.