[Qt-creator] qmodel2svg

[Christian Gagneraud]

On Mon, 10 Dec 2018 at 01:06, Jochen Becher <jochen_becher at gmx.de> wrote:
>
> Hi Christian,
>
> yes, writing a tool that loads a qmodel file and exports an svg diagram
> (or pdf or pixel image) is not a big deal using modelinglib:

Hi Jochen,

Thanks a lot for all the details, got a quick prototype working in 30 minutes!?!
Less than 60 SLOC...

Need to polish the code, add command line argument, ...

Chris



>
> 1. Create an instance of qmt::DocumentController
>
> 2. Load a qmodel file with qmt::DocumentController::loadProject().
> Handle some exceptions for file-not-found etc. You must look into the
> implementation of loadProject() to find out which exceptions are thrown
> during loading.
>
> 3. Implement a visitor derived from qmt::MVoidConstVisitor that
> searches for a diagram by name. Look into qmt::MChildrenVisitor on how
> to visit the whole model tree (you could also derive from
> qmt::MChildrenVisitor but that is not a const visitor). You get the
> root element on which you accept the visitor from
> qmt::ModelController::rootPackage(). The ModelController is available
> from your DocumentController instance.
>
> 4. From your DocumentController instance get the qmt::DiagramsManager.
> Bind your qmt::MDiagram* that you got from the visitor with
> DiagramsManager::bindDiagramSceneModel().
>
> 5. Use the returned qmt::DiagramSceneModel to exportImage(),
> exportPdf() or exportSvg().
>
> That's all. Should be a single file program with less than 500 lines
> including the visitor.
>
> Please submit the tool as part of the tools of the QtCreator project.
>
> Regards, Jochen
>
>
> Am Sonntag, den 09.12.2018, 19:47 +1300 schrieb Christian Gagneraud:
> > Hi there,
> >
> > Every now and then I use QtCreator's ModelEditor plugin.
> > I like to write documentation in MD, and i usually manage the sources
> > with a Makefile to automate various stages for the final off-line
> > production.
> > A missing tool in my workflow is one that could convert a qmodel file
> > into SVG, from the command line.
> > Is it possible to use qtcreator in command line mode to ask the
> > ModelEditor plugin to do an SVG export?
> > If not, I do think that it shouldn't be that hard to write such a
> > dedicated tool, I see 3 ways, from the easiest to the hackiest:
> > 1:
> >  - link to modellib and find a way to do the export
> > Is that simple?
> > 2:
> >  - link against corelib, and initialise it with defaults
> >  - link against extentionsystem, and initialise it with defaults
> >  - ask the extension system to load modeleditor plugin
> >  - call directly into this plugin and ask for the conversion
> > 3:
> > Like 2, but given that Core contains the editor manager and the
> > document manager, i should be able to open a document  with an editor
> > and automate the export (if i don't want to see any UI, i could use
> > the Linux offscreen QPA to hide it)
> >
> > Chris
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>