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| Re: MVC [message #248134 is a reply to message #248106] |
Tue, 07 April 2009 20:59   |
 Ben Vitale
Messages: 247
Registered: July 2009 |
Senior Member |
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If it were me, I would just write a blob of code in my Command to resize
all the model objects, in whatever order I feel like. If the model
objects fire their own change events, fine. If you fire off one
notification at the end, also fine. When the event is received by the
various edit parts that represent the containers, they will update their
figures.
Draw2D uses a deferred painting mechanism by default, so most likely all
the resizes (at the Figure level) will get repainted at once and the
user won't even notice the cascade effect.
Thoughts?
Ben
luciano wrote:
> I have an editor similar to the standard logic editor. As an add-on, if
> an element within a container is resized in such a way that it is not
> anymore totally visible, I would like to change the size of the
> container as well. This process can naturally cascade to the next outer
> container and so on. To support undo/redo , I want to have the whole
> thing in one command. What is the cleanest way to do this, especially
> with respect to the MVC-architecture of GEF? Are there any samples
> available doing something similar?
>
> Thanks,
> Luzi
>
>
>
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| Re: MVC [message #248146 is a reply to message #248134] |
Wed, 08 April 2009 07:17 |
Eclipse User |
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Originally posted by: luzi.anderegg.ergon.ch
Ben Vitale wrote:
> If it were me, I would just write a blob of code in my Command to resize
> all the model objects, in whatever order I feel like. If the model
> objects fire their own change events, fine. If you fire off one
> notification at the end, also fine. When the event is received by the
> various edit parts that represent the containers, they will update their
> figures.
In principal, I would use the approach you suggest. The problem is that
in some cases I only know after drawing the figures that I have to
resize the container. Therefore, I am not sure whether I use the MVC
approach in GEF correctly. Any ideas?
>
> Draw2D uses a deferred painting mechanism by default, so most likely all
> the resizes (at the Figure level) will get repainted at once and the
> user won't even notice the cascade effect.
>
> Thoughts?
> Ben
>
> luciano wrote:
>> I have an editor similar to the standard logic editor. As an add-on,
>> if an element within a container is resized in such a way that it is
>> not anymore totally visible, I would like to change the size of the
>> container as well. This process can naturally cascade to the next
>> outer container and so on. To support undo/redo , I want to have the
>> whole thing in one command. What is the cleanest way to do this,
>> especially with respect to the MVC-architecture of GEF? Are there any
>> samples available doing something similar?
>>
>> Thanks,
>> Luzi
>>
>>
>>
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