|Lazy loading tree, multiple columngrouping [message #1391765]
||Tue, 01 July 2014 11:35
| Daniel Sievers
Registered: July 2014
I am a german software developer. I am very interested in NatTable and try to use it for our Application. We need a high-performance Table/Grid with the standard functions like sorting, filtering, Tree, etc... to show large Datasets.
Currently, we have problems with the following functions:
- TreeGrid with lazy dataloading
- multiple ColumnGroups (more than 3 Level)
Functions like sorting and filtering are implemented.
Now i have two questions:
I've read in the current roadmap, that the function 'column grouping' would be refactore. After the refactoring, it is possible to group more then 3 levels?
Currenty you can create a ColumnGroupGroupHeaderLayer that contains a ColumnGroupHeaderLayer.
Is there a way to load the children of a tree only once when their parent is expand? (like the ITreeContentProvider from JFace?) If i understand the structure aright, then the TreeList (respectively the underlying lists) have to contains all Elements (or at least the details elements) and create from the detailsElements the structure. (Bottom to Top) In my case i have the root elements and can retrieve their children. (like a FileBrowserTree, Top to Bottom)
Currently i try to avoid this problem by catching the ExpandEvent and load the data and put it into the list. I hope this will work. If i have solve this problem successully ich will post it.
I use the current release (Version 1.1.0)
I'm deeply grateful if anyone can respond to my questions.
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