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Re: [Openjgraph-development] two seperate edge connection between two vertices.

From: Jesus M. S. Jr. <jm...@ih...> - 2003-01-23 10:13:24

1) That is an existing problem only on the drawing aspect of the graph. 
The code that draws the edges does not take into account if there are 
other edges connecting the same vertices ... thus overlapping each other 
when the drawing is made.

2) Not with the StraightLineLayout. You can try the OrthogonalLineLayout


Venu Madhav wrote:

> Hi,
> I am unable to code scenario shown below using open 
> jgraph................ please let me know if it possible.
>
>
>                             ---------                                
>                            ------------
>                             |                   | 
> <-------------------------|                          |
>                             |        A        | 
> ------------------------>  |            B            |
>                            
> ---------                                                           
> |------------
>
> When I code it, I am getting two overlapping edges, Please let me know 
> if interconnection between two vertices with seperate edge 
> interconnection possible................
>
> 2. Is it not possible to make the edges bendable and resizable.
>
> Venu
>
>
>
> -------------------------------------------------------
> This SF.NET email is sponsored by:
> SourceForge Enterprise Edition + IBM + LinuxWorld = Something 2 See!
> http://www.vasoftware.com
> _______________________________________________
> Openjgraph-development mailing list
> Ope...@li...
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[Openjgraph-development] two seperate edge connection between two vertices.

From: Venu M. <ve...@in...> - 2003-01-21 12:15:02

Hi,
I am unable to code scenario shown below using open 
jgraph................ please let me know if it possible.


                             ---------                                
                            ------------
                             |                   | 
<-------------------------|                          |
                             |        A        | 
------------------------>  |            B            |
                            ---------                                    
                        |------------

When I code it, I am getting two overlapping edges, Please let me know 
if interconnection between two vertices with seperate edge 
interconnection possible................

2. Is it not possible to make the edges bendable and resizable.

Venu

[Openjgraph-development] First Call for Papers: Graph Drawing 2003

From: Maurizio P. <pat...@di...> - 2002-12-27 19:35:54

 First Call for Papers
 11th International Symposium on Graph Drawing - GD2003
 September 21-24, 2003, Perugia, Italy

 http://www.gd2003.org/

 Please find hereunder a first call for papers for the 11th International
Symposium on Graph Drawing - GD2003.

     Important Dates:
     ----------------
     - Submissions of papers, demos, and posters: May 31, 2003
     - Notification of acceptances: July 15, 2003

 A preliminary version of the GD2003 poster can be downloaded at the
following URL: http://www.gd2003.org/poster.html

 This first call for papers and preliminary version of the poster list the
current sponsors of the Symposium. If your institution or company would
like to become a sponsor of GD2003, and have its name and logo on the
future posters and calls for papers, we invite you to visit
http://www.gd2003.org/

 A final version of the call for papers and of the poster (a hard copy in
large format) will be sent worldwide in March. If you can help us
publicize the symposium by distributing the poster, please send us an
email request for the number of extra copies you would like to receive.

 To contact us, please send an email to: co...@gd...

 Best regards,

 Giuseppe Liotta (conference chair)
 http://www.diei.unipg.it/~liotta/

 Maurizio Patrignani (publicity chair)
 http://www.dia.uniroma3.it/~patrigna/

 Walter Didimo (local arrangements co-chair)
 http://www.dia.uniroma3.it/~didimo/

=========================================================================

                          First Call for Papers

             11th International Symposium on Graph Drawing
                                 GD2003

                 September 21-24, 2003, Perugia, Italy


                         http://www.gd2003.org/
                      e-mail: co...@gd...


  Graph Drawing is concerned with the geometric representation of graphs
and networks and is motivated by those applications where it is crucial to
visualize structural information as graphs. Bridging the gap between
theoretical advances and implemented solutions is an important aspect of
the conference. Indeed, advances in graph drawing are a key factor in such
technological areas as Web computing, e-commerce, VLSI circuit design,
information systems, software engineering, bioinformatics, networking, and
cybergeography. Researchers and practitioners working on theoretical and
practical aspects of graph drawing are welcome to participate.

* Scope.
  ------

  The range of topics that are within the scope of the International
Symposium on Graph Drawing includes (but is not limited to):
   - Visualization of computer networks and Web maps
   - Graph algorithms
   - Visualization of software engineering diagrams
   - Geometric graph theory and geometric computing
   - Software systems and libraries for graph visualization
   - Topology and planarity
   - Visualization of database schemas
   - Graph combinatorics and optimization
   - Visualization of chemical structures and molecules

* Call for Papers, Demos, and Posters.
  ------------------------------------

  Authors are invited to submit papers describing original research and
surveys of theoretical or practical significance to graph drawing.
Demonstrations of systems incorporating original and innovative research
ideas are also solicited. A system demonstration should include
illustrative screen dumps and a description of the system's
functionalities. Regular papers and demos must be labeled as either long
or short; long papers will be assigned 12 pages in the conference
proceedings, and short papers 6 pages. Submissions of posters in graph
drawing and related areas are also solicited. The purpose is to provide a
forum for the communication of results (which may appear elsewhere) to the
graph drawing community.  A poster will be given 2 pages in the conference
proceedings.  Submission of substantially similar papers or demos to GD
2003 and to other conferences with published proceedings is not allowed.

* Graph Drawing Contest.
  ----------------------

  Following the tradition of previous conferences, a graph drawing contest
will be held. A $1,000 prize will be awarded to the winner. Details on the
contest will be provided on the conference web site.

* Instructions for Authors.
  -------------------------

  Each submission must include an indication of its type (paper, demo
description, or poster) and contact information for the primary author.
For a paper or a demo, an indication about whether it is a regular or a
short submission must also be given. Electronic submissions are strongly
encouraged. Detailed submission instructions will be provided on the
conference web site.

* Important Dates.
  ----------------

  - Submissions of papers, demos, and posters: May 31, 2003
  - Notification of acceptance: July 15, 2003
  - Graph Drawing Contest Submissions: TBA

* Proceedings.
  ------------

  Accepted submissions will be published in the conference proceedings,
which we plan to include in the Springer-Verlag series Lecture Notes in
Computer Science. Final versions of accepted submissions are due at the
conference. Instructions for Authors will be available after the paper
notification deadline.

* Location.
  ---------

  The Symposium on Graph Drawing will be held in Perugia, Italy. Perugia
is one of the most ancient Italian cities, located in the center of the
Country at the heart of the "Green Umbria" region. Because of its several
historical and artistic amenities, the city of Perugia and its
neighborhood attract many tourists every year. See also
http://www.perugiaonline.it/ for further information. Perugia is also the
location of one of European's oldest universities, the State University
(founded in 1308), as well as the University for Foreigners (founded in
1925). With over 35,000 students from all over the world, both
Universities play an important role in the city life. Details about hotels
and registration instructions will be provided on the conference web site.

* Program Committee.
  ------------------

  Ashim Garg (SUNY Buffalo, USA)
  Michael Goodrich (University of California, Irvine, USA)
  Ferran Hurtado (Universitat Politcnica de Catalunya, Spain)
  Giuseppe Liotta (University of Perugia, Italy), chair
  Joe Marks (MERL, USA)
  Henk Meijer (Queens University, Canada)
  Stephen North (AT&T Research Labs, USA)
  Patrice Ossona de Mendez (EHESS, CNRS, France)
  Md. Saidur Rahman (Tohoku University, Japan)
  Farhad Shahrokhi (University of North Texas, USA)
  Roberto Tamassia (Brown University, USA)
  Ioannis G. Tollis (University of  Texas, Dallas, USA)
  Dorothea Wagner (University of Konstanz, Germany)
  Sue H. Whitesides (McGill University, Canada)
  Stephen Wismath (University of Lethbridge, Canada)
  David Wood (Carleton University, Canada)

* Conference Organization.
  ------------------------

  C. Binucci (University of Perugia)
  E. Di Giacomo (University of Perugia)
  W. Didimo (University of Perugia), local arrangements co-chair
  G. Liotta (University of Perugia), conference chair
  M. Patrignani (University of Roma Tre), publicity chair
  M. Pizzonia (University of Roma Tre)

* Contest Committee.
  ------------------

  Franz Brandenburg (University of Passau), chair

* Invited Speakers.
  -----------------
  Pat Hanrahan (Stanford Univ.)

* More Info.
  ----------

  For more information and questions about GD2003 please send email to
co...@gd...

* Sponsors.
  ---------
  OREAS - Optimization Research and Software
  INTEGRA Sistemi Srl
  DIGILAB 2000 - Digital Systems Engineering
  DIEI - Dip. di Ing. Elettronica e dell'Informazione - Univ. di Perugia
  DIA - Dipartimento di Informatica e Automazione - Univ. Roma Tre

[Openjgraph-development] 4 questions

From: Eric G. <ega...@xe...> - 2002-04-18 11:48:38

Hi there !
I've downloaded the project and played a bit with it. Sounds Great ! =
looks like it does a lot of what I'm looking for.
Anyway 2 questions for you guys:
- I integrated the graph editor (only a single editor) as a frame run =
from my main program and I'm seeing some refresh problem when I =
remove/resize it. Did domeone already experienced it ?
- Why doesn't it use the standard XML parsers ?
- Despite what I can see in the screenshots provided I cannot make the =
slidebar work properly when the graph overlap the main frame size. Do =
you ?
- Is it possble to participate in development ?
Thanks a lot,
Eg\\*=20

Xevo Emea Sas=20
Les Algorithmes / Aristote B=20
2000, route des Lucioles. BP29=20
06901 Sophia-Antipolis - France=20

email: ega...@xe...=20
mobile: +33 6 16 92 68 57=20
office: +33 4 92 94 48 45=20

=20

Re: [Openjgraph-development] VisualEdge composed of many line segments

From: Jesus M. S. Jr. <jm...@ih...> - 2001-11-16 20:09:31

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Maybe a little clarification is in order.

Execute runsample1.sh ( or runsample1.bat for windows ). You would see two 
graphs. Hit the layout button on the right, then drag one of the vertices. 
You should see an edge being drawn orthogonally ( vertical and horizontal 
lines only ) instead of being drawn straight.

Now OpenGraph also reads and writes them back to XGMML. BUT ..... the problem 
is keeping track of the state, which is not saved into XGMML. This state 
tells the layout manager things like which "port" in each vertex is the 
orthogonal edge connected to. The end result is that, although you have read 
the orthogonal edge from XGMML, it is not displayed properly. ( See the 
Release Notes for 0.9.0 under XGMML ).

Maybe my understanding of XML is not clear, or maybe GraphXML is better 
suited for these kind of things ....

John

On Sat, 17 Nov 2001 06:55, Jesus M. Salvo Jr. wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> On Thu, 15 Nov 2001 23:55, kiran wrote:
> > Hi..
> > I am new to this project. I need some help in the following situation.
> > Any help would be greatly appreciated. what do i need to do to allow an
> > visualedge to be drawn as series of line segments
>
> It already does this. VisualEdge, like VisualVertex, implements
> VisualGraphComponent  which has an overloaded setGeneralPath() to define
> the line segments that make up the drawing. It either takes a
> java.awt.geom.GeneralPath or a java.awt.geom.PathIterator.
>
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Re: [Openjgraph-development] VisualEdge composed of many line segments

From: Jesus M. S. Jr. <jm...@ih...> - 2001-11-16 19:51:34

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On Thu, 15 Nov 2001 23:55, kiran wrote:
> Hi..
> I am new to this project. I need some help in the following situation. Any
> help would be greatly appreciated. what do i need to do to allow an
> visualedge to be drawn as series of line segments 

It already does this. VisualEdge, like VisualVertex, implements 
VisualGraphComponent  which has an overloaded setGeneralPath() to define the 
line segments that make up the drawing. It either takes a 
java.awt.geom.GeneralPath or a java.awt.geom.PathIterator.

> using GraphEditor

Well, if you mean interactively ... it does not have to be in GraphEditor. 
You can create your own class to do that.

> also serialised as a series of line segments into an XML file. 

It also serializes these segments as well into XGMML. See the 
serializerVertex() and serializeEdge() methods of GraphToXGMMLSAXHandler. 
These segments are also read back from XGMML .

> Please indicate broadly the changes needed for the classes to customize 
> openjgraph for the above situation.
>
> Thanks in advance,
>
> Rgs,
> Kiran

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[Openjgraph-development] VisualEdge composed of many line segments

From: kiran <ki...@el...> - 2001-11-15 12:51:59

Hi..
I am new to this project. I need some help in the following situation. =
Any help would be greatly appreciated.
what do i need to do to allow an visualedge to be drawn as series of =
line segments using GraphEditor and also serialised as a series of line =
segments into an XML file. Please indicate broadly the changes needed =
for the classes to customize openjgraph for the above situation.

Thanks in advance,

Rgs,
Kiran

[Openjgraph-development] Re: Patches

From: Jesus M. S. Jr. <jm...@ih...> - 2001-10-09 10:42:16

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Okay, that patch is now in CVS. However, I did make some 
adjustments. The most important of this is that of ChangeStateEvent. There 
are no longer the various ChangeToXXXStateEvent classes. Instead, you pass as 
a parameter to the ChangeStateEvent's constructor the new state you are 
requesting.

The end result is that, instead of ending up with N state classes and N 
ChangeStateEvent classes, you end up with N state classes and only 1 
ChangeStateEvent class. I know some who have more than a handful of 
states ... and writing a separate ChangeTo[statename]Event class maybe more 
of a hassle in those cases.

Furthermore, GraphPanel now also implements KeyListener, and 
VisualGraphComponent and AbstractVisualGraphComponent now have an additional 
processKeyEvent() methods. However, GraphPanel's 
informTargetVisualGraphComponentofKeyEvent ( ... we should really change the 
name of those 2 methods to something shorter ... ) currently does not call 
the prcessKeyEvent of the VisualGraphComponent, since I have not yet figured 
the best way to retrieve the currently focused VisualGraphComponent within 
GraphPanel, though a suggestion is written in the Javadoc for that method.

You may want to get the latest CVS source to try them out.

BTW, it is probably best for all that future discussions WRT openjgraph 
development be made via the development mailing list. I am guilty too of 
failing to put the message on the mailing list. :(

Regards,

John

On Sat,  6 Oct 2001 16:57, you wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
>
> I thought of this again ... and I think you are right with letting the
> state determine the next possible state. ( i.e.: GraphPanelState's methods
> returning GraphPanelState as well ).
>
> It kind of reminds me what I did developing a delivery and tracking system
> way back. An order can be in any of several "states" ( .e.g: ordered,
> purchased, in transit, delivered, attempted delivery, lost, etc. ) I
> remember well documenting the next possible states for each state. ( e.g.:
> for the state to become "delivered", its current state must be one of "in
> transit", "attempted delivery", etc. )
>
> I'll put your changes in and add the the keyXXX() methods as well to the
> GraphPanelState and GraphPanel classes.
>
> Then we should be ready for 0.9.1 release.
>
> On Fri,  5 Oct 2001 18:37, you wrote:
> > Question: When do you sleep? I see a 5 a.m. at this email. And a 11 pm at
> > the email before.
>
> My last e-mail to you was "Fri, 5 Oct 2001 13:01:57 +1000". I sent it at
> 1:00pm yesterday. I think what you see is 13:00 - 10:00 = 3:00 + 2:00 ( for
> Germany ) = 5:00.
>
> > Regards,
> >
> > Armin
>
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[Openjgraph-development] Zooming

From: Patrick H. <pa...@13...> - 2001-08-03 16:06:26

I see that zooming is planned as a future addition to OpenJGraph.  Has
there been any progress on this front?  The software I am writing that
uses OpenJGraph really needs zooming since we are planning to visualize
graphs with thousands (even tens or hundreds of thousands) of vertices.
Right now, just displaying ~20 causes the scroll pane to get pretty
cramped.

If this topic is still open for discussion, has there been any
investigation into the Jazz library (http://www.cs.umd.edu/hcil/jazz/)?
They say they implement zooming capabilities as a basic feature and even
use the formal name Zoomable User Interfaces.  What is the feasibility of
using Jazz as a higher-level interface to making graphs?

 -Patrick


Patrick L. Hartling			| Research Assistant, VRAC
pa...@13...				| 2624 Howe Hall -- (515)294-4916
http://www.137.org/patrick/		| http://www.vrac.iastate.edu/

[Openjgraph-development] Vertex - changing from a class to an interface

From: Jesus M. S. Jr. <jm...@ih...> - 2001-05-20 10:33:14

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On the next release, changes will be made so that Vertex will be an interface 
instead of a class. 

The reason is that developers may already have existing class(es) that they 
want to use as a Vertex. With the current implementation, a Vertex instance 
would have to be created for every other instance of the class the developer 
will wrap to ( via the Vertex.setObject() method ). Take 10,000 instances of 
these classes, and you would also need 10,000 instances of Vertex.

The current Vertex class will be called VertexImpl ( also a class ), while 
the new Vertex will be an interface.

John
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Re: [Openjgraph-development] Adding a mouse listener to a VisualVertex

From: Jesus M. S. Jr. <jm...@ih...> - 2001-05-04 21:06:11

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That's strange. That should have at least caused a compiler error, since 
Graph and VisualGraph do not belong to the same hierarchy. VisualGraph is a 
wrapper around Graph for visual properties.

Anyway, good to hear.

Does the repaint() also work now?

On Fri,  4 May 2001 14:42, Patrick Hartling wrote:
> Okay, I figured out what I was doing wrong.  When I set up my
> GraphScrollPane, I was passing it a VisualGraph but calling setGraph()
> instead of setVisualGraph().  Now it's all working as desired.  =)
> Thanks for the help.
>
>  -Patrick
>
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Re: [Openjgraph-development] Adding a mouse listener to a VisualVertex

From: Patrick H. <pa...@13...> - 2001-05-04 04:42:07

Okay, I figured out what I was doing wrong.  When I set up my
GraphScrollPane, I was passing it a VisualGraph but calling setGraph()
instead of setVisualGraph().  Now it's all working as desired.  =)
Thanks for the help.

 -Patrick

Patrick Hartling <pa...@13...> wrote:

} I have found that the VisualVertex constructor is being called twice for
} every vertex I add to the graph.  In the simple program I wrote where the
} listeners work, this is not the case.  What might I be doing that would
} cause the VisualVertex contructor to be called repeatedly?
} 
}  -Patrick
} 
} "Jesus M. Salvo Jr." <jm...@ih...> wrote:
} 
} } -----BEGIN PGP SIGNED MESSAGE-----
} } Hash: SHA1
} } 
} } Okay, so it seems you are using 0.8.1.
} } 
} } Was the vertex removed and then added before you clicked on the vertex?
} } What happens if you start with a Graph with no vertices, add a single verte
*** x 
} } and adding an additional MouseListener to the visualvertex of the added 
} } vertex, then clicking on the visualvertex?
} } 
} } On Fri,  4 May 2001 03:17, Patrick Hartling wrote:
} } > To folow up on this, further debugging has shown that an element is
} } > being added to mouseListeners in AbstractVisualGraphComponent properly.
} } > When processMouseEvent() is called, however, mouseListeners has no
} } > elements.  This leads me to believe that the code below is modifying
} } > the wrong VisualVertex object (i.e., a different object than what is
} } > clicked on in the graph panel).  If that is case, how do I get a
} } > reference to the VisualVertex that is in the VisualGraph so that I can
} } > operate on it?  Thanks.
} } >
} } >  -Patrick
} } >
} } >
} } > _______________________________________________
} } > Openjgraph-development mailing list
} } > Ope...@li...
} } > http://lists.sourceforge.net/lists/listinfo/openjgraph-development
} } -----BEGIN PGP SIGNATURE-----
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} 
} Patrick L. Hartling			| Research Assistant, VRAC
} pa...@13...				| 2624 Howe Hall -- (515)294-49
*** 16
} http://www.137.org/patrick/		| http://www.vrac.iastate.edu/
} 
} _______________________________________________
} Openjgraph-development mailing list
} Ope...@li...
} http://lists.sourceforge.net/lists/listinfo/openjgraph-development

Patrick L. Hartling			| Research Assistant, VRAC
pa...@13...				| 2624 Howe Hall -- (515)294-4916
http://www.137.org/patrick/		| http://www.vrac.iastate.edu/

Re: [Openjgraph-development] Adding a mouse listener to a VisualVertex

From: Patrick H. <pa...@13...> - 2001-05-04 03:30:26

I have found that the VisualVertex constructor is being called twice for
every vertex I add to the graph.  In the simple program I wrote where the
listeners work, this is not the case.  What might I be doing that would
cause the VisualVertex contructor to be called repeatedly?

 -Patrick

"Jesus M. Salvo Jr." <jm...@ih...> wrote:

} -----BEGIN PGP SIGNED MESSAGE-----
} Hash: SHA1
} 
} Okay, so it seems you are using 0.8.1.
} 
} Was the vertex removed and then added before you clicked on the vertex?
} What happens if you start with a Graph with no vertices, add a single vertex 
} and adding an additional MouseListener to the visualvertex of the added 
} vertex, then clicking on the visualvertex?
} 
} On Fri,  4 May 2001 03:17, Patrick Hartling wrote:
} > To folow up on this, further debugging has shown that an element is
} > being added to mouseListeners in AbstractVisualGraphComponent properly.
} > When processMouseEvent() is called, however, mouseListeners has no
} > elements.  This leads me to believe that the code below is modifying
} > the wrong VisualVertex object (i.e., a different object than what is
} > clicked on in the graph panel).  If that is case, how do I get a
} > reference to the VisualVertex that is in the VisualGraph so that I can
} > operate on it?  Thanks.
} >
} >  -Patrick
} >
} >
} > _______________________________________________
} > Openjgraph-development mailing list
} > Ope...@li...
} > http://lists.sourceforge.net/lists/listinfo/openjgraph-development
} -----BEGIN PGP SIGNATURE-----
} Version: GnuPG v1.0.4 (GNU/Linux)
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Patrick L. Hartling			| Research Assistant, VRAC
pa...@13...				| 2624 Howe Hall -- (515)294-4916
http://www.137.org/patrick/		| http://www.vrac.iastate.edu/

Re: [Openjgraph-development] Adding a mouse listener to a VisualVertex

From: Patrick H. <pa...@13...> - 2001-05-03 22:04:53

"Jesus M. Salvo Jr." <jm...@ih...> wrote:

} -----BEGIN PGP SIGNED MESSAGE-----
} Hash: SHA1
} 
} Okay, so it seems you are using 0.8.1.
} 
} Was the vertex removed and then added before you clicked on the vertex?
} What happens if you start with a Graph with no vertices, add a single vertex 
} and adding an additional MouseListener to the visualvertex of the added 
} vertex, then clicking on the visualvertex?

Okay, this works just fine.  I modified the SameGraph example program so
that it only adds a single vertex (to a single GraphEditor).  I added a
very simple MouseListener to the VisualVertex, and it is doing what I
expect.  I guess something must be going wrong with my code.

 -Patrick

} On Fri,  4 May 2001 03:17, Patrick Hartling wrote:
} > To folow up on this, further debugging has shown that an element is
} > being added to mouseListeners in AbstractVisualGraphComponent properly.
} > When processMouseEvent() is called, however, mouseListeners has no
} > elements.  This leads me to believe that the code below is modifying
} > the wrong VisualVertex object (i.e., a different object than what is
} > clicked on in the graph panel).  If that is case, how do I get a
} > reference to the VisualVertex that is in the VisualGraph so that I can
} > operate on it?  Thanks.
} >
} >  -Patrick
} >
} >
} > _______________________________________________
} > Openjgraph-development mailing list
} > Ope...@li...
} > http://lists.sourceforge.net/lists/listinfo/openjgraph-development
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Patrick L. Hartling			| Research Assistant, VRAC
pa...@13...				| 2624 Howe Hall -- (515)294-4916
http://www.137.org/patrick/		| http://www.vrac.iastate.edu/

Re: [Openjgraph-development] Adding a mouse listener to a VisualVertex

From: Patrick H. <pa...@13...> - 2001-05-03 21:54:26

"Jesus M. Salvo Jr." <jm...@ih...> wrote:

} Okay, so it seems you are using 0.8.1.

Yes, I am.

} Was the vertex removed and then added before you clicked on the vertex?
} What happens if you start with a Graph with no vertices, add a single vertex 
} and adding an additional MouseListener to the visualvertex of the added 
} vertex, then clicking on the visualvertex?

I will have to try this and get back to you.

 -Patrick

} On Fri,  4 May 2001 03:17, Patrick Hartling wrote:
} > To folow up on this, further debugging has shown that an element is
} > being added to mouseListeners in AbstractVisualGraphComponent properly.
} > When processMouseEvent() is called, however, mouseListeners has no
} > elements.  This leads me to believe that the code below is modifying
} > the wrong VisualVertex object (i.e., a different object than what is
} > clicked on in the graph panel).  If that is case, how do I get a
} > reference to the VisualVertex that is in the VisualGraph so that I can
} > operate on it?  Thanks.
} >
} >  -Patrick
} >
} >
} > _______________________________________________
} > Openjgraph-development mailing list
} > Ope...@li...
} > http://lists.sourceforge.net/lists/listinfo/openjgraph-development

Patrick L. Hartling			| Research Assistant, VRAC
pa...@13...				| 2624 Howe Hall -- (515)294-4916
http://www.137.org/patrick/		| http://www.vrac.iastate.edu/

Re: [Openjgraph-development] Setting text displayed on a VisualEdge

From: Patrick H. <pa...@13...> - 2001-05-03 21:52:49

"Jesus M. Salvo Jr." <jm...@ih...> wrote:

} -----BEGIN PGP SIGNED MESSAGE-----
} Hash: SHA1
} 
} On Fri,  4 May 2001 06:35, Jesus M. Salvo Jr. wrote:
} > -----BEGIN PGP SIGNED MESSAGE-----
} > Hash: SHA1
} >
} > Although the actual String has been changed, it has never been rendered.
} >
} > As soon as an Edge is added to the Graph, and it has a corresponding
} > VisualGraph, the VisualGraph is told to repaint() itself so that the new
} > VisualEdge is drawn. Your setText() is called after the repaint() of the
} > VisualGraph. So you need to call repaint() again.
} >
} 
} Without adding the repaint() first, try forcing a repaint of the VisualGraph 
} ( e.g.: by moving a Vertex ). It should display the new text for the Edge.
} 
} Calling repaint() is actually what happens when you right-click on a Vertex 
} or Edge ( in Normal State ), then modify the properties then click OK or 
} Apply.

I tried this, and I tried including a repaint() call immediately after
I set the text on the edge.  Neither works.  :(  Maybe I have some nasty
bug somewhere that I am missing.  Is there some way that vertices and
edges could get removed and re-added behind the scenes?

 -Patrick


Patrick L. Hartling			| Research Assistant, VRAC
pa...@13...				| 2624 Howe Hall -- (515)294-4916
http://www.137.org/patrick/		| http://www.vrac.iastate.edu/

Re: [Openjgraph-development] Adding a mouse listener to a VisualVertex

From: Jesus M. S. Jr. <jm...@ih...> - 2001-05-03 21:20:27

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Okay, so it seems you are using 0.8.1.

Was the vertex removed and then added before you clicked on the vertex?
What happens if you start with a Graph with no vertices, add a single vertex 
and adding an additional MouseListener to the visualvertex of the added 
vertex, then clicking on the visualvertex?

On Fri,  4 May 2001 03:17, Patrick Hartling wrote:
> To folow up on this, further debugging has shown that an element is
> being added to mouseListeners in AbstractVisualGraphComponent properly.
> When processMouseEvent() is called, however, mouseListeners has no
> elements.  This leads me to believe that the code below is modifying
> the wrong VisualVertex object (i.e., a different object than what is
> clicked on in the graph panel).  If that is case, how do I get a
> reference to the VisualVertex that is in the VisualGraph so that I can
> operate on it?  Thanks.
>
>  -Patrick
>
>
> _______________________________________________
> Openjgraph-development mailing list
> Ope...@li...
> http://lists.sourceforge.net/lists/listinfo/openjgraph-development
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Re: [Openjgraph-development] Adding a mouse listener to a VisualVertex

From: Jesus M. S. Jr. <jm...@ih...> - 2001-05-03 21:10:07

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Are you using release 0.8.1? There was a bug with 0.8.0 wherein the 
mouseXXX() methods in AbstractVisualGraphComponents were never called. This 
is fixed with 0.8.1. ( See on-line Release Notes for more details ).

On Fri,  4 May 2001 01:36, Patrick Hartling wrote:
> I am trying to handle the event generated when a VisualVertex object is
> clicked on by the user.  I have code similar to the following:
>
> public class MyClass extends VisualGraph {
>     public boolean addVertex (Vertex v) {
>         try {
>             add(v);
>
>             VisualVertex vis_vertex = getVisaulVertex(v);
>             vis_vertex.addMouseListener(new MouseListener () { ... });
>         }
>         catch (Exception e) {
>             // Handle exception ...
>         }
>     }
> }:
>
> My listener never gets called--or at least, the mouseClicked() method
> never gets called.  Am I misunderstanding how vertex selection events
> are generated, or does my graph have to be in a certain state for the
> mouse clicks to be received?
>
>  -Patrick
>
>
> Patrick L. Hartling			| Research Assistant, VRAC
> pa...@13...				| 2624 Howe Hall -- (515)294-4916
> http://www.137.org/patrick/		| http://www.vrac.iastate.edu/
>
> _______________________________________________
> Openjgraph-development mailing list
> Ope...@li...
> http://lists.sourceforge.net/lists/listinfo/openjgraph-development
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Re: [Openjgraph-development] Setting text displayed on a VisualEdge

From: Jesus M. S. Jr. <jm...@ih...> - 2001-05-03 21:06:42

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On Fri,  4 May 2001 06:35, Jesus M. Salvo Jr. wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> Although the actual String has been changed, it has never been rendered.
>
> As soon as an Edge is added to the Graph, and it has a corresponding
> VisualGraph, the VisualGraph is told to repaint() itself so that the new
> VisualEdge is drawn. Your setText() is called after the repaint() of the
> VisualGraph. So you need to call repaint() again.
>

Without adding the repaint() first, try forcing a repaint of the VisualGraph 
( e.g.: by moving a Vertex ). It should display the new text for the Edge.

Calling repaint() is actually what happens when you right-click on a Vertex 
or Edge ( in Normal State ), then modify the properties then click OK or 
Apply.

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Re: [Openjgraph-development] Setting text displayed on a VisualEdge

From: Jesus M. S. Jr. <jm...@ih...> - 2001-05-03 20:31:14

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Although the actual String has been changed, it has never been rendered. 

As soon as an Edge is added to the Graph, and it has a corresponding 
VisualGraph, the VisualGraph is told to repaint() itself so that the new 
VisualEdge is drawn. Your setText() is called after the repaint() of the 
VisualGraph. So you need to call repaint() again.


On Fri,  4 May 2001 01:31, Patrick Hartling wrote:
> I am having a problem trying to override the default text assigned to a
> VisualEdge object.  My code is roughly like the following:
>
> public class MyClass extends VisualGraph {
>     public boolean connectNodes (Vertex from, Vertex to) {
>         try {
>             Edge edge           = getGraph().addEdge(from, to);
>             VisualEdge vis_edge = getVisualEdge(edge);
>
>             vis_edge.setText("My label");
>         }
>         catch (Exception e) {
>             // Handle exception ...
>         }
>     }
> }:
>
> If I call vis_edge.getText(), it gives me a String containing "My label",
> but in the visual graph, the label always displays the from -> to
> relationship.  What am I doing wrong?
>
>  -Patrick
>
>
> Patrick L. Hartling			| Research Assistant, VRAC
> pa...@13...				| 2624 Howe Hall -- (515)294-4916
> http://www.137.org/patrick/		| http://www.vrac.iastate.edu/
>
> _______________________________________________
> Openjgraph-development mailing list
> Ope...@li...
> http://lists.sourceforge.net/lists/listinfo/openjgraph-development
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Re: [Openjgraph-development] Adding a mouse listener to a VisualVertex

From: Patrick H. <pa...@13...> - 2001-05-03 17:17:07

To folow up on this, further debugging has shown that an element is
being added to mouseListeners in AbstractVisualGraphComponent properly.
When processMouseEvent() is called, however, mouseListeners has no
elements.  This leads me to believe that the code below is modifying
the wrong VisualVertex object (i.e., a different object than what is
clicked on in the graph panel).  If that is case, how do I get a
reference to the VisualVertex that is in the VisualGraph so that I can
operate on it?  Thanks.

 -Patrick

Patrick Hartling <pa...@13...> wrote:

} I am trying to handle the event generated when a VisualVertex object is
} clicked on by the user.  I have code similar to the following:
} 
} public class MyClass extends VisualGraph {
}     public boolean addVertex (Vertex v) {
}         try {
}             add(v);
} 
}             VisualVertex vis_vertex = getVisaulVertex(v);
}             vis_vertex.addMouseListener(new MouseListener () { ... });
}         }
}         catch (Exception e) {
}             // Handle exception ...
}         }
}     }
} }:
} 
} My listener never gets called--or at least, the mouseClicked() method
} never gets called.  Am I misunderstanding how vertex selection events
} are generated, or does my graph have to be in a certain state for the
} mouse clicks to be received?
} 
}  -Patrick
} 
} 
} Patrick L. Hartling			| Research Assistant, VRAC
} pa...@13...				| 2624 Howe Hall -- (515)294-49
*** 16
} http://www.137.org/patrick/		| http://www.vrac.iastate.edu/
} 
} _______________________________________________
} Openjgraph-development mailing list
} Ope...@li...
} http://lists.sourceforge.net/lists/listinfo/openjgraph-development

Patrick L. Hartling			| Research Assistant, VRAC
pa...@13...				| 2624 Howe Hall -- (515)294-4916
http://www.137.org/patrick/		| http://www.vrac.iastate.edu/

[Openjgraph-development] Adding a mouse listener to a VisualVertex

From: Patrick H. <pa...@13...> - 2001-05-03 15:36:13

I am trying to handle the event generated when a VisualVertex object is
clicked on by the user.  I have code similar to the following:

public class MyClass extends VisualGraph {
    public boolean addVertex (Vertex v) {
        try {
            add(v);

            VisualVertex vis_vertex = getVisaulVertex(v);
            vis_vertex.addMouseListener(new MouseListener () { ... });
        }
        catch (Exception e) {
            // Handle exception ...
        }
    }
}:

My listener never gets called--or at least, the mouseClicked() method
never gets called.  Am I misunderstanding how vertex selection events
are generated, or does my graph have to be in a certain state for the
mouse clicks to be received?

 -Patrick


Patrick L. Hartling			| Research Assistant, VRAC
pa...@13...				| 2624 Howe Hall -- (515)294-4916
http://www.137.org/patrick/		| http://www.vrac.iastate.edu/

[Openjgraph-development] Setting text displayed on a VisualEdge

From: Patrick H. <pa...@13...> - 2001-05-03 15:31:58

I am having a problem trying to override the default text assigned to a
VisualEdge object.  My code is roughly like the following:

public class MyClass extends VisualGraph {
    public boolean connectNodes (Vertex from, Vertex to) {
        try {
            Edge edge           = getGraph().addEdge(from, to);
            VisualEdge vis_edge = getVisualEdge(edge);

            vis_edge.setText("My label");
        }
        catch (Exception e) {
            // Handle exception ...
        }
    }
}:

If I call vis_edge.getText(), it gives me a String containing "My label",
but in the visual graph, the label always displays the from -> to
relationship.  What am I doing wrong?

 -Patrick


Patrick L. Hartling			| Research Assistant, VRAC
pa...@13...				| 2624 Howe Hall -- (515)294-4916
http://www.137.org/patrick/		| http://www.vrac.iastate.edu/

Re: [Openjgraph-development] Node selection events?

From: Patrick H. <pa...@13...> - 2001-04-30 15:08:07

"Jesus M. Salvo Jr." <jm...@ih...> wrote:

} The way it works is that GraphPanel implements the MouseListener and
} MouseMotionListener interfaces. Thus, you will see the mouseXXX() methods on
} the GraphPanel class. These methods simply delegates the actual action
} depending on the state ( as in the state pattern on the GoF book ) of the
} GraphPanel class.

Okay, this is just what I was looking for.  I had been focusing too much
on GraphScrollPane.  I'll get to work on using GraphPanels.  Thanks!

 -Patrick

} On Mon, 30 Apr 2001 09:41, Patrick Hartling wrote:
} > I am just getting started with OpenJGraph, and I was wondering if it is
} > possible to know when a node in a graph is selected.  For the project I
} > am working on, I would like to be able to select a node in the graph and
} > have a JTable be updated based on the selection.  Thanks.
} >
} >  -Patrick
} >
} >
} > Patrick L. Hartling			| Research Assistant, VRAC
} > pa...@13...				| 2624 Howe Hall -- (515)294-49
*** 16
} > http://www.137.org/patrick/		| http://www.vrac.iastate.edu/
} >
} > _______________________________________________
} > Openjgraph-development mailing list
} > Ope...@li...
} > http://lists.sourceforge.net/lists/listinfo/openjgraph-development

Patrick L. Hartling			| Research Assistant, VRAC
pa...@13...				| 2624 Howe Hall -- (515)294-4916
http://www.137.org/patrick/		| http://www.vrac.iastate.edu/

Re: [Openjgraph-development] Node selection events?

From: Jesus M. S. Jr. <jm...@ih...> - 2001-04-30 11:52:45

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

The way it works is that GraphPanel implements the MouseListener and
MouseMotionListener interfaces. Thus, you will see the mouseXXX() methods on
the GraphPanel class. These methods simply delegates the actual action
depending on the state ( as in the state pattern on the GoF book ) of the
GraphPanel class.

The states are Normal, Vertex, and Edge states. These states correspond to
the three buttons ( save for the Layout button ) that you see using
GraphEditor. These states correspond to the classes GraphPanelNormalState,
GraphPanelVertexState, GraphPanelEdgeState ... all of which inherit from
GraphPanel abstract class.

Finally, these state classes passes on the mouse events to the
VisualGraphComponent ( if any ) via the processMouseEvent() and
processMouseMotionEvent() methods of the VisualGraphComponent interface.

GraphPanel ---( delegates to ) --- > state class ---- ( passes event to )
- ---> VisualGraphComponent

HTH,

John

On Mon, 30 Apr 2001 09:41, Patrick Hartling wrote:
> I am just getting started with OpenJGraph, and I was wondering if it is
> possible to know when a node in a graph is selected.  For the project I
> am working on, I would like to be able to select a node in the graph and
> have a JTable be updated based on the selection.  Thanks.
>
>  -Patrick
>
>
> Patrick L. Hartling			| Research Assistant, VRAC
> pa...@13...				| 2624 Howe Hall -- (515)294-4916
> http://www.137.org/patrick/		| http://www.vrac.iastate.edu/
>
> _______________________________________________
> Openjgraph-development mailing list
> Ope...@li...
> http://lists.sourceforge.net/lists/listinfo/openjgraph-development
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