Gantt chart Y-axis tick label iterartion with TagLib not working

[mcstoufer]

It seems that I am not able to properly iterate over a bean provided lists of y-axis tick label names when generating a Gantt chart with the TagLib provided. In fact since the <axisY> element must be a direct descendant to <chart>, I see no way to programaticaly set the labels for the ticks in any manner.

 Snippet below:

<chartfx:chart height="280" width="450" gallery="GANTT">   <c:forEach items="${stackedBarChartBean.userInputs}" var="userInput" varStatus="userInputStatus">   <chartfx:axisY>   <chartfx:keyLabel>   <chartfx:label index="${userInputStatus.index}">   ${userInput}   </chartfx:label>   </chartfx:keyLabel>

...

</chartfx:chart> 

[mcstoufer]

GabrielA was kind enough to post an entire set of chart examples in TagLib. This helps immensely. However, these examples do expose the limitations of the taglib not being able to generate charts from a dynamic set of data. I have attached (hopefully) a JSP using the TagLib that does NOT work due to the taglib's enforcement of hierarchy of its elements.

 As you will see, being unable to use the forEach tag limits the ability. Is this a bug or feature? 

[GabrielA]

It is a design limitation, so I guess it is a "feature", you can not add any extra tag inside the chartfx tag. 

The best alternative is to use the listProvider.  Chart FX will loop throught the List and build the chart based on the its. This is a example (I'm sorry, I'm not taglib expert so the extra code is plain java):

<%

java.util.List list1 = new java.util.ArrayList(5);

list1.add("Desktops");

list1.add("Laptops");

list1.add("Monitor");

list1.add("Keyboard");

list1.add("Mouse");

java.util.List list2 = new java.util.ArrayList(5);

list2.add(new Integer(20));

list2.add(new Integer(30));

list2.add(new Integer(20));

list2.add(new Integer(50));

list2.add(new Integer(40));

java.util.List list3 = new java.util.ArrayList(5);

list3.add(new Integer(50));

list3.add(new Integer(40));

list3.add(new Integer(50));

list3.add(new Integer(60));

list3.add(new Integer(30));

java.util.List list4 = new java.util.ArrayList();

list4.add(list1);

list4.add(list2);

list4.add(list3);

pageContext.setAttribute("points",list4);

%>

<chartfx:chart height="240" width="400" rightGap="30">

  <chartfx:dataSourceSettings>

  <chartfx:listProvider list="points"/>

  </chartfx:dataSourceSettings>

</chartfx:chart>

You may be able to give your bean object directly to the listProvider.  Try with simple chart first, just passing some data to see if it works, then you can use the dataType to specify how you want the data to be handled, i.e INI_VALUE, XVALUE, LABEL, etc.

 

[mcstoufer]

I've actually made some inroads with getting access to the data from the Bean into the sets of the dataValue element. It's not pretty, but it is dynamic nonetheless.  I guess I'd now like to file a formal bug report regarding the taglib not being able to live alongside core JSTL elements. How is that done?

Taking a que from the taglib examples prodived, I now have whittled the tick label issue down to the following:

 

  <chartfx:chart height="280" width="450" gallery="GANTT">   <chartfx:axisCollection>   <chartfx:axis index="2">   <chartfx:labels>

<%-- A forEach loop needs to start here so I can iterate over index and label values from a call to a Bean object --%>   <chartfx:label index="${varStatus.index}" label="${var}"/>

<%-- And end here --%>   </chartfx:labels>   </chartfx:axis>   </chartfx:axisCollection>

...

</chartfx:chart> 

[GabrielA]

Please send an email to support@softwarefx.com; they will log the bug and assign a case number, so you get notified when the issue is resolved. 

Include a note saying that you have been asked by GabrielA to log this bug.

 

[Michael.Provost]

I am running into the same issue using the Chart FX 6.5 Community Version.

I am wondering if any progress has been made on this issue?

Info.zip

[mcstoufer]

 I never got a response from them regarding a fix. I have long since moved on from that issue and the work-around is buried deep in the code stack.

Too bad, though. the taglib would of been a great integration model for our projects.