Hi Michael,
I modified the code as you said. I enabled viewing nodes without data.
I found that helper object is not the feature I needed, because after
the modification some nodes appeared that are not supposed to be seen
by the user. So I disabled helper objects in the preferences.
The code looks like this, the old version is commented:
if (! m_ShowHelperObjects)
{
//hide helper objects....
// m_Predicate = mitk::NodePredicateAnd::New(dataIsNotNull,
isNotHelperObject);
m_Predicate = isNotHelperObject;
}
else
{
//show helper objects
// m_Predicate = dataIsNull;
m_Predicate = mitk::NodePredicateOr::New(dataIsNull, dataIsNotNull);
}
I did not find a "true" predicate, and instead of creating one by
subclassing, I used this ugly trick.
For the first sight it seems to work well, however, there was probably
an intention behind not showing nodes without data. Do you know if it
can cause problems later? What I found for now, is the following
message in the output:
#5.570# ERROR: WARNING: No image, too many (>2) or two equal images
were selected.
Thank you!
Regards,
Miklos
On Fri, Jul 29, 2011 at 9:24 AM, Müller, Michael
<[email protected]> wrote:
> Hi Miklos,
>
> well no, you dont need to use fake images. You may use the helper objects for
> organizing your nodes in a way that you want. It is just that the DataManager
> will not show this nodes. Nodes marked as "helper objects" and contain data
> are meant for nodes that should be rendered but not accessible by the user,
> e.g. the bounding box used by the ImageCropper bundle. Do not forget that the
> DataStorage is not a tree-like structure although the DataManager shows it in
> a TreeView. This is why we decided not to use "organizer" nodes any more.
> But feel free to change this behavior: The class QmitkDataStorageTreeModel is
> responsible for what is shown in the DataManager. You will find the method
> "SetShowHelperObjects"- here you will find the predicate "dataIsNotNull" for
> the data selection. Just remove it and your nodes should show up if the
> preference is enabled.
>
> Regards,
> Michael
>
> -----Ursprüngliche Nachricht-----
> Von: Miklos Espak [mailto:[email protected]]
> Gesendet: Donnerstag, 28. Juli 2011 23:00
> An: Müller, Michael
> Cc: mitk-users
> Betreff: Re: [mitk-users] helper objects are not visible
>
> Hi,
>
> the name could have been anything, "helper node" was just an example.
>
> I am afraid I did not understand the concept behind helper nodes. I
> thought they are some "symbolic" nodes only for grouping other nodes,
> so they do not need to contain data. According to your mail I was
> wrong. But if they contain data like other nodes then what is the
> difference between helper and not helper nodes? Nothing? Is this only
> a flag?
>
> What I need is some nodes for grouping other nodes, but not containing
> data. Just for organizing the image nodes. Is there a way to achieve
> this? Shall I create a "fake" image (0x0 pixel) and assign it to such
> nodes?
>
> Thanks,
> Miklos
>
> On Thu, Jul 28, 2011 at 11:26 AM, Müller, Michael
> <[email protected]> wrote:
>> Hi Miklos,
>>
>> the code you posted is not correct- you need to set a bool property "helper
>> object" and not the name:
>>
>> mitk::DataNode::Pointer helperNode = mitk::DataNode::New();
>> helperNode->SetName("awesome node");
>> helperNode->SetBoolProperty("helper object", true);
>> GetDataStorage()->Add(helperNode);
>> helperNode->SetVisibility(true);
>>
>> !!! But be aware that enabling the mentioned preference will only show up
>> helper objects that contain data. Helper objects without data will never be
>> shown.
>> Hope that helps. If it is still not working, feel free to file a bug on
>> http://bugs.mitk.org
>>
>> Regards,
>> Michael
>>
>> -----Ursprüngliche Nachricht-----
>> Von: Miklos Espak [mailto:[email protected]]
>> Gesendet: Dienstag, 12. Juli 2011 17:59
>> An: mitk-users
>> Betreff: [mitk-users] helper objects are not visible
>>
>> Hi,
>>
>> I would like to add some nodes to the Datamanager View that do not
>> contain images, they would just group some other nodes. Browsing the
>> MITK code I found that helper objects are for this. Showing helper
>> objects can be enabled/disabled from the Window / Preferences dialog.
>> I enabled it but I still not see the nodes not containing images.
>>
>> The code I used to create a helper node is the following:
>>
>> mitk::DataNode::Pointer helperNode = mitk::DataNode::New();
>> helperNode->SetName("helper node");
>> GetDataStorage()->Add(helperNode);
>> helperNode->SetVisibility(true);
>>
>> Is there something I missed?
>> I added the code to the AwesomeApp, and built it with the HEAD.
>>
>> Regards,
>> Miklos
>>
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