>What are the candidate features for xxx_text layer ?
I'm not sure exactly. ESRI does it, so it must be smart, right? :-)
I guess I was mostly thinking of DXF imported layers. I'm not sure it makes
as much sense in a stand-alone plugin, but I'll give the use case a try:
features that are currently displaying non-null labels. In other words, if
labeling is turned on, and the label attribute for the feature is not the ""
string, then copy the feature to the _text layer and enable the label style
for the destination.
Larry
On 10/3/07, Michaël Michaud <[EMAIL PROTECTED]> wrote:
>
> Hi,
>
> Very good Larry,
> Just a question about text part :
> What is the concept behind annotation ?
> I know that many famous formats as DXF, MIF/MID, GeoConcept... have a
> text type, but I'm not a big fan of this. IMHO, displaying text is the
> "style" purpose and not a geometry type problem, but I may have missed
> some use cases.
> What are the candidate features for xxx_text layer ?
>
> Thanks
>
> Michaël
>
>
> Larry Becker a écrit :
>
> > Making a generic capability to break out a layer into linestrings,
> > polygons, points, and annotation is an excellent idea. If you recall,
> > I tried to port over the capability to do this with the shapefiles
> > version of SkyJUMP's enhanced Save Selected Datasets command. Perhaps
> > the best way to do this is to refactor this capability out as a
> > separate class and plugin.
> >
> > I'll add this to my to-do list. Does anyone have specific use cases?
> > I'm assuming that the command would leave the original layer alone,
> > and create new layers for each of the geometry types mentioned above.
> > It would use the original layer name and append _line, _area, _point,
> > or _text (internationalized). Does this sound reasonable?
> >
> > The menu might say something like, "Extract geometry types to separate
> > layers", if that isn't too lengthy.
> >
> > regards,
> > Larry
> >
> > On 10/3/07, * Michaël Michaud* <[EMAIL PROTECTED]
> > <mailto:[EMAIL PROTECTED]>> wrote:
> >
> > Larry Becker a écrit :
> >
> > > Hi Michaël,
> > >
> > > As I might have mentioned before, we use your dxf plugin
> > > extensively. I have been meaning to write that auto-style script
> > > too. Hope you get it done first :-) There are some issues with
> > > styling text, since you don't usually want the point displayed,
> and
> > > also, by default, the text centers on the point instead of left
> > > justifying. In fact, I added the new label style left
> > justification
> > > for just this purpose.
> >
> > Hi, it seems that reproducing the exact DXF layout may be more
> > difficult
> > than what I have thought.
> >
> > >
> > > This introduces an item on my dxf wish list. ESRI's DXF import
> > > automatically places text, points, linestrings, and polygons on
> > their
> > > own layer. I don't know of a precedent for this in JUMP, but I
> > don't
> > > see why it isn't possible, do you? Clearly it would make
> automated
> > > styling easier.
> >
> > IMHO, OpenJUMP has the great advantage to be able to manage
> > heterogeneous layers, and this capability must be used to preserve
> > imported file structure as close as possible to the source one (DXF,
> > MIF/MID) .
> > Dispatching features in different layers according to their
> > geometry (or
> > to an attribute value) is a generic need which should be
> > developped in a
> > separate plugin (not included in the driver). A plugin already
> > exists to
> > select features with a specific geometry type. Developping another
> one
> > to create a layer by geometry type should not be too hard.
> >
> > For DXF layers, I must admit that dispatching features from
> different
> > DXF layers into different OpenJUMP layers should take place in the
> > driver. It is just a bit more work to load features from a single
> file
> > into several layers. On the other hand, dispatching loaded features
> > using an attribute value is also an easy thing, and I already
> > developped
> > a plugin to do that (this can also be considered as a generic
> > function,
> > and can be useful in other situations).
> >
> > Michael
> >
> > >
> > > regards,
> > >
> > > Larry
> > >
> > > On 10/1/07, *Michaël Michaud* < [EMAIL PROTECTED]
> > <mailto:[EMAIL PROTECTED]>
> > > <mailto:[EMAIL PROTECTED]
> > <mailto:[EMAIL PROTECTED]>>> wrote:
> > >
> > > Hi Peppe,
> > >
> > > I read your page about CAD. Good documentation !
> > > Here are some propositions to be more precise about what the
> > > driver can
> > > do and what it cannot :
> > > - subset of supported geometries features (ex. POINT,
> > > POLYLINE..., I'll
> > > check that)
> > > - list of dxf feature attributes imported (COLOR,
> THICKNESS...,
> > > see the
> > > schema of an imported dxf file)
> > > - more precise description of how polylines are imported :
> > the DXF
> > > "closed" field is used to know if geometries have to be
> > imported as
> > > polygons or as polylines. This way the parser can make a
> > difference
> > > between a closed line (a polyline with identical first and
> > last points
> > > but without the closed dxf attribute) and a polygon (a
> > closed polyline
> > > with the closed attribute) : to test it, you can draw a
> > polygon and a
> > > closed polyline in jump, export it in dxf and import it back
> > into
> > > jump.
> > > - we should also write that the plugin is able to "export"
> > DXF files
> > > from OpenJUMP, even if this is less useful than importing cad
> > > drawings.
> > > - I did not test all the dxf version you considered (8 to
> > > 14/2002). Hope
> > > that works. The driver is based on an old version of DXF
> > > specification
> > > (10 or 12, don't remember exactly). Most of new features are
> > simply
> > > ignored. One major limitation is about local coordinates :
> > if some
> > > objects in the drawing are described in a local coordinate
> > system, the
> > > parser will ignore that and use them as if they were absolute
> > > coordinates.
> > >
> > > I read attributes such as color and thickness as normal jump
> > > attributes
> > > because basically, a jump driver read geometries and
> attributes,
> > > not styles.
> > > But reading your paper, I thought that it should not be too
> > > difficult to
> > > write a script which can apply styles to dxf-layers using
> their
> > > dxf-attributes (I'll give this a try)
> > >
> > > Michaël
> > >
> > > Giuseppe Aruta a écrit :
> > >
> > > > Hi Michael,
> > > > I wrote a small tutorial about CAD files
> > > > (http://openjump.org/wiki/show/CAD+Tutorial).
> > > > I did some consideration about your DXF plugin, I would
> > > like you give
> > > > it a look (maybe I made some mistakes about it).
> > > >
> > > > Thanks
> > > >
> > > > peppe
> > > >
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