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Parent/Child hierarchy for shapes and GraphicsAlgorithm [message #1202727]

Fri, 22 November 2013 09:33

Antoine Lorence

Messages: 3
Registered: September 2013

Junior Member

Hi,

I am writing a graph editor for a dataflow application. I follow Graphiti online help and create for each object on my diagram a top level ContainerShape containing other ContainerShapes or Shapes. Each one has its own corresponding GraphicsAlgorithm and it works but the resulting model is pretty complicated.

I saw that IGaCreateService.createXXX methods asks for a GraphicsAlgorithmContainer as parameter. So a new GraphicsAlgorithm can be created as child of a PictogramElement OR a GraphicsAlgorithm.

My question is : Is it interesting to create Shapes/ContainerShapes only when it is necessary and create complex graphical objects by appending GraphicsAlgorithm to other GraphicsAlgorithm (when it is possible) ?

Is it a mistake, a very bad thing or could it be a nice choice to simplify the diagram hierarchy ?

[Updated on: Fri, 22 November 2013 15:49]

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Re: Parent/Child hierarchy for shapes and GraphicsAlgorithm [message #1208848 is a reply to message #1202727]

Mon, 25 November 2013 07:54

Hallvard Traetteberg

Messages: 673
Registered: July 2009
Location: Trondheim, Norway

Senior Member

Hi,

I think the answer to your question is yes. Shapes are created when you
want to link to a model element, whereas GraphicsAlgorithms provide the
visualization of the shape it's within and can be arbitrary complex and
nested.

Hallvard

On 22.11.13 10:33, Antoine Lorence wrote:
> Hi,
>
> I am writing a graph editor for a dataflow application. I follow
> Graphiti online help and create for each object on my diagram a top
> level ContainerShape containing other ContainerShapes or Shapes. Each
> one has its own corresponding GraphicsAlgorithm and it works but the
> resulting model is pretty complicated.
>
> I saw that IGaCreateService.createXXX methods asks for a
> GraphicsAlgorithmContainer as parameter. So a new GraphicsAlgorithm can
> be created as children of a PictogramElement OR a GraphicsAlgorithm.
>
> My question is : Is it interesting to create Shapes/ContainerShapes only
> when it is necessary and create complex graphical objects by appending
> GraphicsAlgorithm to other GraphicsAlgorithm (when it is possible) ?
>
> Is it a mistake, a very bad thing or could it be a nice choice to
> simplify the entire diagram hierarchy ?

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