<div dir="ltr"><div>Well, I did try with a vtkSmartPointer but it didn't work either. Still segfaulting. This is the code state at the moment and I can't figure out why! It is definitely the problem of this bit as the rest of the plugin is compiling and running without segfaulting. So, I hope you can help me. Thanks. <br>
<br>XML: <br><br> <StringVectorProperty<br> name="CPOList"<br>
label="CPOList"<br> command="SetCPOList"<br> number_of_elements_per_<div>command="1"<br> information_property="CPOListInfo"<div class="im"><br> panel_visibility="default"><br>
<StringListDomain name="array_list"><br> <RequiredProperties><br> <Property function="ArrayList"<br></div> name="CPOListInfo"/><br> </RequiredProperties><br>
</StringListDomain><br><br> <Documentation><br> This property helps select the CPO.<br> </Documentation><br> </StringVectorProperty><br><br> <StringVectorProperty<br>
name="CPOListInfo"<br> label="CPOListInfo"<br> command="GetCPOList"<br> information_only="1" ><br> <StringArrayHelper /><br> </StringVectorProperty><br>
</div><br><br></div>C++:<br><br><br>vtkStringArray* ReadUALGrid::GetCPOList(){<br><br><br> vtkSmartPointer<vtkStringArray> labels;<br><br><br> labels->InsertNextValue("hello");<br> labels->InsertNextValue("world");<br>
<br><br> return labels;<br><br>}<br><br>void ReadUALGrid::SetCPOList(const char* name)<br><br>{<br><br>}<br><br><br></div><div class="gmail_extra"><br><br><div class="gmail_quote">On 18 August 2014 15:49, Cory Quammen <span dir="ltr"><<a href="mailto:cory.quammen@kitware.com" target="_blank">cory.quammen@kitware.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">The biggest problem is that vtkNew will decrement the reference count<br>
when you go out of scope in GetCPOList(), so it will be garbage<br>
collected and anything using the return value may cause a crash. For<br>
your quick proof-of-concept work, use a vtkSmartPointer instead, or<br>
even just a raw pointer.<br>
<br>
Also, SetCPOList takes an int, but shouldn't it take a char* or const char*?<br>
<span class="HOEnZb"><font color="#888888"><br>
Cory<br>
</font></span><div class="HOEnZb"><div class="h5"><br>
On Mon, Aug 18, 2014 at 9:42 AM, Girish Ramesh <<a href="mailto:rgirish28@gmail.com">rgirish28@gmail.com</a>> wrote:<br>
> Sorry but I'm still getting a seg fault and I'm not sure why. This is the<br>
> relevant code within the plugin. Thanks.<br>
><br>
> XML:<br>
><br>
> <StringVectorProperty<br>
> name="CPOList"<br>
> label="CPOList"<br>
> command="SetCPOList"<br>
> number_of_elements_per_command="1"<br>
> information_property="CPOListInfo"<br>
><br>
> panel_visibility="default"><br>
> <StringListDomain name="array_list"><br>
> <RequiredProperties><br>
> <Property function="ArrayList"<br>
> name="CPOListInfo"/><br>
> </RequiredProperties><br>
> </StringListDomain><br>
><br>
> <Documentation><br>
> This property helps select the CPO.<br>
> </Documentation><br>
> </StringVectorProperty><br>
><br>
> <StringVectorProperty<br>
> name="CPOListInfo"<br>
> label="CPOListInfo"<br>
> command="GetCPOList"<br>
> information_only="1" ><br>
> <StringArrayHelper /><br>
> </StringVectorProperty><br>
><br>
> C++:<br>
><br>
> vtkStringArray* ReadUALGrid::GetCPOList(){<br>
><br>
><br>
> vtkNew<vtkStringArray> labels;<br>
><br>
><br>
> labels->InsertNextValue("hello");<br>
> labels->InsertNextValue("world");<br>
><br>
><br>
> return labels.GetPointer();<br>
><br>
> }<br>
><br>
> void ReadUALGrid::SetCPOList(int index)<br>
><br>
> {<br>
><br>
> }<br>
><br>
><br>
> I'm just using a random vtkStringArray for testing, but it still segfaults.<br>
> Thank you for the help.<br>
><br>
> Regards,<br>
> Girish<br>
><br>
><br>
><br>
><br>
> On 18 August 2014 15:31, Girish Ramesh <<a href="mailto:rgirish28@gmail.com">rgirish28@gmail.com</a>> wrote:<br>
>><br>
>> Thank you very much Cory for your help. I guess the forum shall be<br>
>> peppered with any more problems I have!<br>
>><br>
>> Regards,<br>
>> Girish<br>
>><br>
>><br>
>> On 18 August 2014 15:29, Cory Quammen <<a href="mailto:cory.quammen@kitware.com">cory.quammen@kitware.com</a>> wrote:<br>
>>><br>
>>> Girish,<br>
>>><br>
>>> Unfortunately, there isn't much documentation about the server manager<br>
>>> XMLs. Finding something that looks like what you are trying to do in<br>
>>> the UI and then tracking it down in the XML is currently the best way.<br>
>>><br>
>>> Thanks,<br>
>>> Cory<br>
>>><br>
>>> On Mon, Aug 18, 2014 at 9:25 AM, Girish Ramesh <<a href="mailto:rgirish28@gmail.com">rgirish28@gmail.com</a>><br>
>>> wrote:<br>
>>> > Dear Cory,<br>
>>> ><br>
>>> > Thank you very much. Your hints were very helpful. Option 2 was what I<br>
>>> > was<br>
>>> > looking for, but I didn't use the StringListDomain in the second<br>
>>> > property to<br>
>>> > connect the information. So my plugin was seg faulting repeatedly even<br>
>>> > though I thought my logic was correct. Also, is there any resource to<br>
>>> > find<br>
>>> > more about servermanager xmls and how to connect the different classes<br>
>>> > together or is the only option to look at examples. Sorry for the<br>
>>> > trouble<br>
>>> > :)Thanks again!<br>
>>> ><br>
>>> > Regards,<br>
>>> > Girish<br>
>>> ><br>
>>> ><br>
>>> ><br>
>>> ><br>
>>> > On 18 August 2014 15:16, Cory Quammen <<a href="mailto:cory.quammen@kitware.com">cory.quammen@kitware.com</a>> wrote:<br>
>>> >><br>
>>> >> Girish,<br>
>>> >><br>
>>> >> Is the list of strings fixed, or can it vary depending on the file?<br>
>>> >> There are three things you can do depending on what you need:<br>
>>> >><br>
>>> >> 1). If you have a fixed set of strings, you can use an<br>
>>> >> IntVectorProperty, and set its domain as a list of strings with an<br>
>>> >> associated integer, i.e., an enumeration.<br>
>>> >><br>
>>> >> <IntVectorProperty command="SetVariableType"<br>
>>> >> default_values="0"<br>
>>> >> name="VariableType"<br>
>>> >> number_of_elements="1"><br>
>>> >> <EnumerationDomain name="enum"><br>
>>> >> <Entry text="Variable 1"<br>
>>> >> value="0" /><br>
>>> >> <Entry text="Variable 2"<br>
>>> >> value="1" /><br>
>>> >> <Entry text="Variable 3"<br>
>>> >> value="2" /><br>
>>> >> </EnumerationDomain><br>
>>> >> </IntVectorProperty><br>
>>> >><br>
>>> >> This generates a combo box in the UI, and only one element can be<br>
>>> >> selected at a time. It will expect your reader to have methods with<br>
>>> >> the signature<br>
>>> >><br>
>>> >> virtual void SetVariableType(int i);<br>
>>> >> virtual int GetVariableType();<br>
>>> >><br>
>>> >> Within your reader, you can use this enumeration value to do whatever<br>
>>> >> you'd like.<br>
>>> >><br>
>>> >> 2). If you just have a list of strings generated in your reader and<br>
>>> >> want to enable the selection of one, you can use a<br>
>>> >> StringVectorProperty with a StringListDomain, e.g.<br>
>>> >><br>
>>> >> <StringVectorProperty command="GetAllDimensions"<br>
>>> >> information_only="1"<br>
>>> >> name="DimensionInfo"><br>
>>> >> <StringArrayHelper /><br>
>>> >> </StringVectorProperty><br>
>>> >> <StringVectorProperty animatelable="0"<br>
>>> >> command="SetDimensions"<br>
>>> >> name="Dimensions"<br>
>>> >> number_of_elements="1"<br>
>>> >> panel_visibility="default"><br>
>>> >> <StringListDomain name="array_list"><br>
>>> >> <RequiredProperties><br>
>>> >> <Property function="ArrayList"<br>
>>> >> name="DimensionInfo" /><br>
>>> >> </RequiredProperties><br>
>>> >> </StringListDomain><br>
>>> >> </StringVectorProperty><br>
>>> >><br>
>>> >> The first property here is an "information-only" property. ParaView<br>
>>> >> will invoke the method "GetAllDimensions" in your reader which should<br>
>>> >> return a vtkStringArray. The second property is responsible for<br>
>>> >> displaying the string array as a combobox, and invokes the method<br>
>>> >> "SetDimensions" with the value selected in the combobox. You need the<br>
>>> >> StringListDomain in the second property to connect the<br>
>>> >> information-only property to the second property.<br>
>>> >><br>
>>> >> 3). If you need to populate the list depending on what is in the file<br>
>>> >> and be able to select/deselect list entries (e.g., to pick which<br>
>>> >> variables are loaded from the file), then see the XML file<br>
>>> >><br>
>>> >><br>
>>> >> ParaView/ParaViewCore/ServerManager/SMApplication/Resources/readers.xml<br>
>>> >><br>
>>> >> and search for the SourceProxy named "FlashReaderCore". You'll find<br>
>>> >> this XML property definition:<br>
>>> >><br>
>>> >> <!-- Array Selection GUI Component --><br>
>>> >> <StringVectorProperty information_only="1"<br>
>>> >> name="CellArrayInfo"><br>
>>> >> <ArraySelectionInformationHelper attribute_name="Cell" /><br>
>>> >> </StringVectorProperty><br>
>>> >> <StringVectorProperty command="SetCellArrayStatus"<br>
>>> >> element_types="2 0"<br>
>>> >> information_property="CellArrayInfo"<br>
>>> >> label="Cell Arrays"<br>
>>> >> name="CellArrayStatus"<br>
>>> >> number_of_elements="0"<br>
>>> >> number_of_elements_per_command="2"<br>
>>> >> repeat_command="1"><br>
>>> >> <ArraySelectionDomain name="array_list"><br>
>>> >> <RequiredProperties><br>
>>> >> <Property function="ArrayList"<br>
>>> >> name="CellArrayInfo" /><br>
>>> >> </RequiredProperties><br>
>>> >> </ArraySelectionDomain><br>
>>> >> <Documentation>This property lists which cell-centered arrays<br>
>>> >> to<br>
>>> >> read.</Documentation><br>
>>> >> </StringVectorProperty><br>
>>> >> <StringVectorProperty information_only="1"<br>
>>> >> name="PointArrayInfo"><br>
>>> >> <ArraySelectionInformationHelper attribute_name="Point" /><br>
>>> >> </StringVectorProperty><br>
>>> >><br>
>>> >> This XML is responsible for showing in the GUI the list of<br>
>>> >> cell-associated arrays. In the vtkAMRFlashReader, there are a number<br>
>>> >> of<br>
>>> >> methods that are defined to make this work. (These are actually<br>
>>> >> defined in vtkAMRFlashReader's parent class, vtkAMRBaseReader.h)<br>
>>> >><br>
>>> >> // Description:<br>
>>> >> // Get the data array selection tables used to configure which data<br>
>>> >> // arrays are loaded by the reader.<br>
>>> >> vtkGetObjectMacro(CellDataArraySelection, vtkDataArraySelection);<br>
>>> >><br>
>>> >> // Description:<br>
>>> >> // Get the number of point or cell arrays available in the input.<br>
>>> >> int GetNumberOfCellArrays();<br>
>>> >><br>
>>> >> // Description:<br>
>>> >> // Get the name of the point or cell array with the given index in<br>
>>> >> // the input.<br>
>>> >> const char* GetCellArrayName(int index);<br>
>>> >><br>
>>> >> // Description:<br>
>>> >> // Get/Set whether the point or cell array with the given name is to<br>
>>> >> // be read.<br>
>>> >> int GetCellArrayStatus(const char* name);<br>
>>> >> void SetCellArrayStatus(const char* name, int status);<br>
>>> >><br>
>>> >> The first method listed above might not be necessary in your reader;<br>
>>> >> I'm not sure. The rest are necessary.<br>
>>> >><br>
>>> >> Note in this XML and method definitions that "Cell" is the name of the<br>
>>> >> given to the association of array the reader can load. You can replace<br>
>>> >> all occurrences of "Cell" with whatever name is more appropriate for<br>
>>> >> your needs.<br>
>>> >><br>
>>> >> I hope that helps,<br>
>>> >> Cory<br>
>>> >><br>
>>> >> On Mon, Aug 18, 2014 at 5:46 AM, Girish Ramesh <<a href="mailto:rgirish28@gmail.com">rgirish28@gmail.com</a>><br>
>>> >> wrote:<br>
>>> >> > Hi,<br>
>>> >> ><br>
>>> >> > I have been breaking my head over this problem for a while now as<br>
>>> >> > there<br>
>>> >> > are<br>
>>> >> > no servermanager xml explanations anywhere. So, what I want to<br>
>>> >> > accomplish is<br>
>>> >> > populate a GUI list with a vtkStringArray and be able to select<br>
>>> >> > strings<br>
>>> >> > within the list in order to fill a variable . Can someone please<br>
>>> >> > help me<br>
>>> >> > or<br>
>>> >> > point me in the right direction in this task? I am writing my own<br>
>>> >> > plugin<br>
>>> >> > reader as you may have understood, but I'm stuck at this point for a<br>
>>> >> > while.<br>
>>> >> > Thanks.<br>
>>> >> ><br>
>>> >> > Regards,<br>
>>> >> > Girish<br>
>>> >> ><br>
>>> >> > _______________________________________________<br>
>>> >> > Paraview-developers mailing list<br>
>>> >> > <a href="mailto:Paraview-developers@paraview.org">Paraview-developers@paraview.org</a><br>
>>> >> > <a href="http://public.kitware.com/mailman/listinfo/paraview-developers" target="_blank">http://public.kitware.com/mailman/listinfo/paraview-developers</a><br>
>>> >> ><br>
>>> ><br>
>>> ><br>
>><br>
>><br>
><br>
</div></div></blockquote></div><br></div>