Oracle Jet Gantt combine Hierarchical Tasks & Multiple Tasks Per row

User_ELI3X

Hi,

I am using oracle jet 7 and found the following two examples in the cookbook

Hierarchical Tasks https://www.oracle.com/webfolder/technetwork/jet/jetCookbook.html?component=gantt&demo=hierarchicalTasks

Multiple Tasks Per row https://www.oracle.com/webfolder/technetwork/jet/jetCookbook.html?component=gantt&demo=multipleTasks

Is it possible to combine these two. I want to have several lines collasible with the Hierarchical Tasks and then the lowest tree element to have multiple tasks per row. Is this possible till now i have not found a solution.

One is based on a ArrayDataProvider and the other on ArrayTreeDataProvider. Is this a problem?

John 'JB' Brock-Oracle

To use the Hierarchical data, you will need to use the TreeDataProvider.  Beyond that, yes, you should be able to have multiple tasks per row inside of that TreeData structure as well.

User_SF7H7

Any tips on how to set it up? I'm also trying to do the same use case, using an ArrayTreeDataProvider. However, any task that I intend to be placed on the same row as the others always end up on a separate row.

SLopes

Hi,

Have you managed to combine both hierarchical and multiple tasks per row in the same gantt?

So far, whenever I provide an ArrayTreeDataProvider I get tasks with sub-tasks, and if I create a simple ArrayDataProvider I can put multiple tasks in the same row (row-id works as described). But I can't find a way to mix both.

I'm using the OJET 11, and looking into a way to display a parent task that groups multiple sub-tasks in the same row.

Wilson Louie-Oracle

Hi, hierarchical multiple tasks per row is not supported today (only hierarchical single tasks per row or flat multiple tasks per row), but it's on the roadmap.

If you really must right now, you may be able to achieve a version of it by combining the Table + RowExpander with the Gantt (similar to https://www.oracle.com/webfolder/technetwork/jet/jetCookbook.html?component=dataCollections&demo=hierGanttwithTable), but it's a non-trivial amount of work. Here's a general setup in case you're curious:

• The Table and Gantt would have separate dataproviders. The Table + RowExpander (https://www.oracle.com/webfolder/technetwork/jet/jetCookbook.html?component=rowExpanderTable&demo=tableRowExpander) would use a FlattenedTreeDataProviderView that wraps a TreeDataProvider that providers hierarchical ROW data. The Gantt's multiple tasks per row data can be represented hierarchically, but in the end will need to be flattened and wrapped with e.g. an ArrayDataProvider.
• Upon expand/collapse (e.g. see the expandedObservable.subscribe() from the viewModel.js of https://www.oracle.com/webfolder/technetwork/jet/jetCookbook.html?component=dataCollections&demo=hierGanttwithTable) of a row on the Table side, the associated tasks data need to be inserted/removed from the tree representation, flattened, wrapped with an ArrayDataProvider, and passed to the Gantt to update the rows added/removed.
• If the above works, you would also need to make sure the whole thing is keyboard accessible.

SLopes

Hi, thank you for the reply; yeah I already looked into the Table+Gantt option but it will take a lot of time considering the amount of work and that I'd need some time to prototype; that is why I was looking into using only the API provided by the Gantt component.

Guess I'll fallback to providing two screens/gantts and adjust UI and features, at least until either the use case becomes possible or I get the time to implement the Table/Gantt option.