hypertree-user — Users mailing list

[Hypertree-user] Merge Ontographics enhancements

[Roman K. <ro...@on...>]

Hi,

I have just merged my enhancement from the Ontographics Project
(http://ontographics.com/source/ ) into the CVS HEAD.

There are some bigger changes in there, so it is possible that some
things do not work as expected. I am going to look into this in more
detail and fix it.

Cheers, Roman

[Hypertree-user] my Enhancements to the hypertree library

[Roman K. <ro...@in...>]

Hi there,

I'm developing a tree editor based on the hypertree library. I have made
several enhancements, which I would like to give back to you:
1. optional background image
2. set different sizes of nodes
3. jump directly to a specific node (programmatically)
4. change the border-width of nodes, display the current active node with
double-width border
Are you interested in these enhancements? If yes, what's your preferred
way for receiving these changes? Should I make a diff and post it to the
projects patch-system?

Best regards, Roman

-- 
SOAP for Python:    http://pythonsoap.sourceforge.net
Knowledge-Tracking: http://ktv3.sourceforge.net

[Hypertree-user] hyperTreeApplet

[swaxi <sw...@fn...>]

(i dont know if the forums are getting posted automatically. if they do i 
apoligies)

This piece of software is fun. 

I got started on developing a applet, that loads its data through xml - to 
use as a component in webpages for navigation and such. 

i put it out on : 
http://www.kyberfabrikken.dk/opensource/hyperTreeApplet/ 

If anybody wants to share in on enhancing the applet, you should be welcome.

/troels

Re: [Hypertree-user] Node labels too short

[Lars M. G. <la...@ga...>]

Hello Christophe,

I'm travelling, so it takes me a while to respond. Sorry about that.

* Lars Marius Garshol
|
| [...] on nodes that are not in the middle of the screen the labels
| are shrunk. This means that for 90% of the nodes in the display you
| can't actually read the name of the node.

* Bouthier Christophe
| 
| Yes, I know that this is a problem. This is why I have put tooltips
| now: by putting the mouse cursor on a node, you can have the whole
| name of the node in a tooltip.

I think that helps a little, but it doesn't really solve the problem,
because as things are now the problem is that although you can see the
structure visually you can't actually identify each node, because you
can't read the label.

| Another solution is to show the complete name of the node as soon as
| there is enough vertical space to show letters.
| But this is not a really good solution. You can try it yourself :
| all is done in the hypertree/HTNodeLabel.java file, in the draw
| method.  Just comment the while loop in the middle of the draw
| method.  But I don't really like this solution. If you have nodes
| with long names, it takes too much space.

I think this sounds like the right way to do it. I can see if I can
find the time to hack the code to do this, and then see if I will be
happy with the result.

| Another solution, suggered by a developer on this mailing-list more
| than a year ago (sorry for the delay) is to show the full name with
| a control-click.
| This is what I just implemented (files included). You have to
| maintain the mouse button pressed. It's more like a control-pressed
| than a control-click. But you can also do a control-drag.

That's similar to the mouse-over, I feel. I'll look at it, though.
 
| A better solution would be to adapt the length of the label itself
| to hyperbolic length. But it requires a little bit of maths, and I
| don't have the necessary time for it right now. Maybe later ? :-)
| Or you can try it if you think it's worth it :-)

Hmmm. This might be an idea. Do you have the maths written up anywhere?
 
* Lars Marius Garshol
|
| Also, extending the node interface with support for colour
| information would be very very nice. Any chance of that happening?
 
* Bouthier Christophe
|
| A lot of people asked it. So there it is now :-)

Oh, thanks! That was nice. :)
 
-- 
Lars Marius Garshol, Ontopian         <URL: http://www.ontopia.net >
ISO SC34/WG3, OASIS GeoLang TC        <URL: http://www.garshol.priv.no >

Re: [Hypertree-user] Node labels too short

[Bouthier C. <Chr...@lo...>]

Oops, wrong file.
Forgot to comment some try code to get ride of the QuadCurve class
by simulating the curve with small lines.
But it is too slow.

This version should be faster.

C.
-- 
By the grace of God Almighty
And the pressures of the marketplace
The human race has civilized itself.
It's a miracle.                      -Roger Waters-Amused to death-

Re: [Hypertree-user] Node labels too short

[Bouthier C. <Chr...@lo...>]

On Thu, Nov 28, 2002 at 11:31:47AM +0100, Lars Marius Garshol wrote:
> I've been experimenting with using HyperTree to visualize tree
> structures found in the associations in topic maps[1], and have been
> very pleased with it, except for in one regard: on nodes that are not
> in the middle of the screen the labels are shrunk. This means that for
> 90% of the nodes in the display you can't actually read the name of
> the node. The fact that there is no visual indication of the shrinking
> makes it even worse.
> 
> Are there any plans to fix this? Would it be easy to hack it myself to
> fix it?

Yes, I know that this is a problem. This is why I have put tooltips now:
by putting the mouse cursor on a node, you can have the whole name of the 
node in a tooltip.
Another solution is to show the complete
name of the node as soon as there is enough vertical space to show letters.
But this is not a really good solution. You can try it yourself :
all is done in the hypertree/HTNodeLabel.java file, in the draw method.
Just comment the while loop in the middle of the draw method.
But I don't really like this solution. If you have nodes with long names, 
it takes too much space. 
Another solution, suggered by a developer on this mailing-list more than
a year ago (sorry for the delay) is to show the full name with a
control-click.
This is what I just implemented (files included). You have to maintain
the mouse button pressed. It's more like a control-pressed than a
control-click. But you can also do a control-drag.

A better solution would be to adapt the length of the label itself to 
hyperbolic length. But it requires a little bit of maths, and I don't
have the 
necessary time for it right now. Maybe later ? :-)
Or you can try it if you think it's worth it :-)

> Also, extending the node interface with support for colour information
> would be very very nice. Any chance of that happening?

A lot of people asked it. So there it is now :-)

> Anyway, thanks for a useful tool!

You're welcome.

C.
-- 
By the grace of God Almighty
And the pressures of the marketplace
The human race has civilized itself.
It's a miracle.                      -Roger Waters-Amused to death-

[Hypertree-user] Node labels too short

[Lars M. G. <la...@ga...>]

I've been experimenting with using HyperTree to visualize tree
structures found in the associations in topic maps[1], and have been
very pleased with it, except for in one regard: on nodes that are not
in the middle of the screen the labels are shrunk. This means that for
90% of the nodes in the display you can't actually read the name of
the node. The fact that there is no visual indication of the shrinking
makes it even worse.

Are there any plans to fix this? Would it be easy to hack it myself to
fix it?

Also, extending the node interface with support for colour information
would be very very nice. Any chance of that happening?

Anyway, thanks for a useful tool!

[1] <URL: http://easytopicmaps.com >

-- 
Lars Marius Garshol, Ontopian         <URL: http://www.ontopia.net >
ISO SC34/WG3, OASIS GeoLang TC        <URL: http://www.garshol.priv.no >

Re: [Hypertree-user] Applet version of demo?

[Bouthier C. <Chr...@lo...>]

On Tue, Nov 13, 2001 at 11:32:29AM -0000, Ewan Leith wrote:
> I've been trying out your software, and it's very cool. The one thing that
> would help though might be a java applet version of the demo that can be
> embedded in a webpage.
> 
> Does anyone know if an applet version of the demo exists, or if not, how
> hard it would be to convert the existing demo to an applet (I know very
> little java...)

It's a work in progress.
If you have an applet, it could not read data from the hard drive. 
The solution is then to read the data from a file, for example an XML
file (buzzword compliant) :-)
That's precisely what I'm doing right now, using the GXL DTD.
You can expect to have an applet demo version before the end of the year :-)

Koto

[Hypertree-user] Applet version of demo?

[Ewan L. <ej...@ma...>]

Hi,

I've been trying out your software, and it's very cool. The one thing that
would help though might be a java applet version of the demo that can be
embedded in a webpage.

Does anyone know if an applet version of the demo exists, or if not, how
hard it would be to convert the existing demo to an applet (I know very
little java...)

Thanks,

Ewan

Re: [Hypertree-user] Cycles ?

[Bouthier C. <Chr...@lo...>]

On Tue, Sep 25, 2001 at 11:56:05AM +0200, Olivier Fambon wrote:
> Hi HypeTree Team.

Hi

> Yes, I'm from XeroX, and I use your nice little software...

Thanks a lot. It's a great honor to be use by Xerox people :-)
By the way, how did you find the hypertree project ?
OAnd,if it's not a private information, why don't you use the inxight
software ?

> [I don't know if I should be talking to you by the way ;)]

:-)
I'm sure that Xerox is enought open-minded for that :-)

> I have two questions, though:
> - Any easy way to allow for cycles in the 'trees' ?

I have seen things like that on the hyperprof software of Burlatov 

http://www.physics.orst.edu/~bulatov/HyperProf/index.html
 
I have only seen the applet version, not the code, as explained on the page :-)

On my code, the geodesic are kept in an hastable on the HTDrawNodeComposite class.
Thoses geodesics are the one liking this node to its children, but you can add any 
geodesic that you like. The trick is then to refresh the coordinates of the 
geodesics when you do drag and drop, because you should recompute
the geodesic only AFTER the TWO NODES linked have been refreshed.

I think that the easiest way to do this is to add a list of gedesic linking two
no-related nodes directly on the HTDraw class.

> - When the node data is too big to be displayed in a small label, I
>   guess you narrow it. Fine. Would it be easy to make a C-click 'zoom
>   into the label', or temporarily 'widden' it ?

Really easy. Do a drawFull method on the HTNodeLabel class, and call it in the
mouseClicked method of HTAction.


Your questions are interesting. However, I have to leave for 2 days tommorow morning.
So, I will have to wait for next week before trying effectively to code them :-)


Hope we will be able to collaborate :-)

Christophe Bouthier
-- 
By the grace of God Almighty
And the pressures of the marketplace
The human race has civilized itself.
It's a miracle.                      -Roger Waters-Amused to death-

[Hypertree-user] Cycles ?

[Olivier F. <Oli...@xr...>]

Hi HypeTree Team.

Yes, I'm from XeroX, and I use your nice little software...

[I don't know if I should be talking to you by the way ;)]

I have two questions, though:

- Any easy way to allow for cycles in the 'trees' ?

- When the node data is too big to be displayed in a small label, I
  guess you narrow it. Fine. Would it be easy to make a C-click 'zoom
  into the label', or temporarily 'widden' it ?


Thanxs.

A+O.