Gantt Chart Categorydata Objects?

[Gantt Chart Categorydata Objects?]

I already did, and no response. all the questions about gantt charts on there have no replies. this forum looked like there were more active and knowledgeable people here.

[Gantt Chart Categorydata Objects?]

I'm having a couple of problems. First off, I am using JasperSoft iReport version 3.7.1 selecting Gantt chart from the Widgets Pro item of the Palette.

 

Through trial and error and hunting for info, I finally had my charts looking something like the first one (where each user has their own chart)... see sched chart 1.jpg

but I was confused as to why I was getting the tasks lined up correctly but an extra "blank" row. I was assigning the second column, the task-group "scheduled shift" "logins" and "pauses" as processes to the tasks.

so after reading http://www.fusioncha...tMultiTask.html I decided maybe my users should be the processes, and the taskgroupings should be some grouping of the tasks, but I don't seem to have done it right - see sched chart 2.jpg

 

my data is going to be coming from database queries, although for testing I just made a test dataset.

For the end result, I need to have a dynamic start and end for the timeline, that I'll get from report parameters. So I can't manually define the categories. The dialog box for the categories says:

"You can specify the entire list of Categories providing an expression. It must return a List of CategoryData objects."

 

What must I pass in? What exactly are CategoryData objects? I can't seem to find any documentation for this. What I want to have is my timeline have a user-input start and end, and that timeline broken out automatically into one-hour segments (categories). How can I achieve this?

 

the pics are attached, it won't let me upload .jrxml files so here is the code for the widgets:

code that produced sched chart 1.jpg:

<fw:ganttChart xmlns:fw="http://jaspersoft.com/fusion"'>http://jaspersoft.com/fusion" xsi:schemaLocation="http://jaspersoft.com/fusion http://jaspersoft.com/schema/fusion.xsd" useTime="true">

<fw:widgetProperty name="dateFormat">

<fw:propertyExpression><![CDATA["HH:mn:ss"]]></fw:propertyExpression>

</fw:widgetProperty>

<fw:widgetProperty name="showFullDataTable">

<fw:propertyExpression><![CDATA[boolean.FALSE]]></fw:propertyExpression>

</fw:widgetProperty>

<fw:categorySet>

<fw:category>

<fw:startExpression><![CDATA[new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").parse("2011-05-02 00:00:00")]]></fw:startExpression>

<fw:endExpression><![CDATA[new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").parse("2011-05-02 23:59:59")]]></fw:endExpression>

<fw:labelExpression><![CDATA["Sample Category"]]></fw:labelExpression>

</fw:category>

</fw:categorySet>

<fw:processes>

<dataset resetType="Group" resetGroup="user"/>

</fw:processes>

<fw:tasks>

<dataset resetType="Group" resetGroup="user"/>

<fw:task>

<fw:taskProperty name="color">

<fw:propertyExpression><![CDATA[$F{process}.equals("scheduled shift") ? new java.awt.Color(-13395457):

$F{process}.equals("logins") ? new java.awt.Color(-10040320):

new java.awt.Color(-6710887)]]></fw:propertyExpression>

</fw:taskProperty>

<fw:idExpression><![CDATA[$F{task}]]></fw:idExpression>

<fw:process>

<fw:idExpression><![CDATA[$F{process}]]></fw:idExpression>

<fw:labelExpression><![CDATA[$F{process}]]></fw:labelExpression>

</fw:process>

<fw:startExpression><![CDATA[$F{startDate}]]></fw:startExpression>

<fw:endExpression><![CDATA[$F{endDate}]]></fw:endExpression>

<fw:labelExpression><![CDATA[""]]></fw:labelExpression>

</fw:task>

</fw:tasks>

</fw:ganttChart>

 

---------------------------------------------

code that produced sched chart 2.jpg:

<fw:ganttChart xmlns:fw="http://jaspersoft.com/fusion"'>http://jaspersoft.com/fusion" xsi:schemaLocation="http://jaspersoft.com/fusion http://jaspersoft.com/schema/fusion.xsd" useTime="true">

<fw:widgetProperty name="dateFormat">

<fw:propertyExpression><![CDATA["HH:mn:ss"]]></fw:propertyExpression>

</fw:widgetProperty>

<fw:widgetProperty name="showFullDataTable">

<fw:propertyExpression><![CDATA[boolean.FALSE]]></fw:propertyExpression>

</fw:widgetProperty>

<fw:categorySet>

<fw:category>

<fw:startExpression><![CDATA[new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").parse("2011-05-02 00:00:00")]]></fw:startExpression>

<fw:endExpression><![CDATA[new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").parse("2011-05-02 23:59:59")]]></fw:endExpression>

<fw:labelExpression><![CDATA["Sample Category"]]></fw:labelExpression>

</fw:category>

</fw:categorySet>

<fw:processes>

<dataset/>

</fw:processes>

<fw:tasks>

<dataset/>

<fw:task>

<fw:taskProperty name="color">

<fw:propertyExpression><![CDATA[$F{taskgroup}.equals("scheduled shift") ? new java.awt.Color(-13395457):

$F{taskgroup}.equals("logins") ? new java.awt.Color(-10040320):

new java.awt.Color(-6710887)]]></fw:propertyExpression>

</fw:taskProperty>

<fw:idExpression><![CDATA[$F{task}]]></fw:idExpression>

<fw:process>

<fw:idExpression><![CDATA[$F{process}]]></fw:idExpression>

<fw:labelExpression><![CDATA[$F{process}]]></fw:labelExpression>

</fw:process>

<fw:startExpression><![CDATA[$F{startDate}]]></fw:startExpression>

<fw:endExpression><![CDATA[$F{endDate}]]></fw:endExpression>

<fw:labelExpression><![CDATA[""]]></fw:labelExpression>

</fw:task>

</fw:tasks>

</fw:ganttChart>