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Can graphiti support diagrams with fixed layouts? [message #663050]

Sat, 02 April 2011 14:56

Eclipse User

Originally posted by: wbeckwith.gmail.com

We have a custom gui editor, I'm thinking of trying to redo with
graphiti and it looks like graphiti can handle everything except I
haven't seen if it can handle diagrams where the layout of elements is
fixed. By fixed I mean the user can't place a pictogram element
wherever they want. They choose the element and we choose the position.
Also we use the draw2d equivalent of the Manhattan Router for drawing
connections between elements so that they don't overlap.

If graphiti can handle both situations then it looks like a great
candidate for handling our gui.

Wb

Re: Can graphiti support diagrams with fixed layouts? [message #663070 is a reply to message #663050]

Sun, 03 April 2011 03:31

Eclipse User

Am 02.04.11 20:56, schrieb Wendell Beckwith:
> We have a custom gui editor,

Cool, so I'm not the only one doing crazy stuff ;-)

> I'm thinking of trying to redo with
> graphiti and it looks like graphiti can handle everything except I
> haven't seen if it can handle diagrams where the layout of elements is
> fixed.

That should be possible - you just have to override the canXXX methods
of the various features so that the user will not be able to move or
resize the elements in question.

> By fixed I mean the user can't place a pictogram element wherever
> they want. They choose the element and we choose the position.

The user has to choose a position to create the element, but whether you
stick to that proposition when actually placing the element is up to
you. Warning: Incomprehensible user interfaces ahead :-).

> Also we
> use the draw2d equivalent of the Manhattan Router for drawing
> connections between elements so that they don't overlap.

Don't know about that, sorry.

HTH
Volker

--
* Volker Wegert * http://www.volker-wegert.de/contact *

Re: Can graphiti support diagrams with fixed layouts? [message #663075 is a reply to message #663070]

Sun, 03 April 2011 05:33

Eclipse User

Wendell,

We have built several Graphiti editors where the layout is fully automated. So this is perfectly possible. You have to make sure that the FeatureProvider defines no features for everything that has to do with layout.

We have redefined the following methods to return null: getReconnectionFeature(), getMoveBendpointFeature(), getResizeShapeFeature(), getMoveAnchorFeature(), getAddBendpointFeature(), getMoveShapefeature(), getMoveConnectionDecoratorFeature().
This effectively ensures that the user cannot change anything in the layout.

Jos

Re: Can graphiti support diagrams with fixed layouts? [message #663261 is a reply to message #663050]

Mon, 04 April 2011 09:13

Eclipse User

The Manhattan routing question still seems to be open:
Graphiti provides ManhattanConnections that could be used for that purpose.
In order to make them non-overlapping, you would use a standard layouting
library, e.g. the one that is provided with GEF. There's an example how to
do that in the FAQ section of our Eclipse page (under documenation).

Michael

"Wendell Beckwith" wrote in message news:in7r30$5g0$1@news.eclipse.org...

We have a custom gui editor, I'm thinking of trying to redo with
graphiti and it looks like graphiti can handle everything except I
haven't seen if it can handle diagrams where the layout of elements is
fixed. By fixed I mean the user can't place a pictogram element
wherever they want. They choose the element and we choose the position.
Also we use the draw2d equivalent of the Manhattan Router for drawing
connections between elements so that they don't overlap.

If graphiti can handle both situations then it looks like a great
candidate for handling our gui.

Wb

Re: Can graphiti support diagrams with fixed layouts? [message #663640 is a reply to message #663075]

Tue, 05 April 2011 21:21

Eclipse User

Originally posted by: wbeckwith.gmail.com

Thanks Jos,

So simple yet hard to think of doing when new to the API.

Wb

On 4/3/2011 4:33 AM, Jos Warmer wrote:
> Wendell,
>
> We have built several Graphiti editors where the layout is fully
> automated. So this is perfectly possible. You have to make sure that the
> FeatureProvider defines no features for everything that has to do with
> layout.
> We have redefined the following methods to return null:
> getReconnectionFeature(), getMoveBendpointFeature(),
> getResizeShapeFeature(), getMoveAnchorFeature(),
> getAddBendpointFeature(), getMoveShapefeature(),
> getMoveConnectionDecoratorFeature(). This effectively ensures that the
> user cannot change anything in the layout.
>
> Jos

Re: Can graphiti support diagrams with fixed layouts? [message #663642 is a reply to message #663261]

Tue, 05 April 2011 21:30

Eclipse User

Originally posted by: wbeckwith.gmail.com

Thanks for the reference, the only bad part seems to be that the
additional of a custom feature will expose this in the context menu,
according to the FAQ entry and this is not something we want users to
need to control/invoke.

Wb

On 4/4/2011 8:13 AM, Michael Wenz wrote:
> The Manhattan routing question still seems to be open:
> Graphiti provides ManhattanConnections that could be used for that
> purpose. In order to make them non-overlapping, you would use a standard
> layouting library, e.g. the one that is provided with GEF. There's an
> example how to do that in the FAQ section of our Eclipse page (under
> documenation).
>
> Michael

Re: Can graphiti support diagrams with fixed layouts? [message #663729 is a reply to message #663640]

Wed, 06 April 2011 07:02

Eclipse User

Simple indeed, but it took me some time to figure it out Smile

Eclipse User wrote on Tue, 05 April 2011 21:21

Originally posted by: wbeckwith.gmail.com

Thanks Jos,

So simple yet hard to think of doing when new to the API.

Wb
...

Re: Can graphiti support diagrams with fixed layouts? [message #663781 is a reply to message #663642]

Wed, 06 April 2011 09:24

Eclipse User

That's only done by the default implementation in
DefaultToolBehaviorProvider.getContextMenu and can be changed by overriding.

Michael

"Wendell Beckwith" wrote in message news:ingf9o$ehr$1@news.eclipse.org...

Thanks for the reference, the only bad part seems to be that the
additional of a custom feature will expose this in the context menu,
according to the FAQ entry and this is not something we want users to
need to control/invoke.

Wb

On 4/4/2011 8:13 AM, Michael Wenz wrote:
> The Manhattan routing question still seems to be open:
> Graphiti provides ManhattanConnections that could be used for that
> purpose. In order to make them non-overlapping, you would use a standard
> layouting library, e.g. the one that is provided with GEF. There's an
> example how to do that in the FAQ section of our Eclipse page (under
> documenation).
>
> Michael

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