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problem with column hide [message #1827413]

Thu, 14 May 2020 04:34

Eclipse User

I noticed strange behaviour in my application and tried to reproduce the problem in an NatTable example (actually i expected the behaviour to be correct with the example)

My test is based on ColumnHideShowExample (which shows 10 entries)

with more than one row (this is the expected behaviour!):
select a row and then click on a column header -> hide column.
the column you clicked on gets removed.

do the same with only one row and all the columns get removed.
the same happens when you select all rows

NOTICE: the color of the column headers change a bit (they get darker, in the cases when the misbehaviour occurs)

using Nattable 1.6.0.201909181823

Re: problem with column hide [message #1827416 is a reply to message #1827413]

Thu, 14 May 2020 04:59

Eclipse User

This is because of the special handling of fully selected columns. The feature is that you can select multiple columns and then call "hide column". Then all fully selected columns are hidden. If you only have one row and select that row, every column is fully selected and therefore hidden.

If you have an idea how to solve your issue by still keeping the feature of multi column hide, feel free to share. That issue is known for a long time and I never got any idea how to solve this.

Re: problem with column hide [message #1827417 is a reply to message #1827416]

Thu, 14 May 2020 05:04

Eclipse User

thanks for the fast reply.

do you have a solution with dropping the multi column hide?
as if i have a row selected i will always have all columns selected - which shall never be all hidden... so this makes no sense in my case.

EDIT: and the full-select is not implemented by me - it just happens...
so i just select the row and nattable makes a full column selection.
- how can i disable this feature ?

[Updated on: Thu, 14 May 2020 05:14] by Moderator

Re: problem with column hide [message #1827424 is a reply to message #1827417]

Thu, 14 May 2020 06:02

Eclipse User

Well, the definition of a fully selected column is that all cells in a column are selected. For this the selection is inspected. One use once made the suggestion to check if a column was was fully selected by a click on the header. But I had no chance to investigate further on this.

There are several ways. You could either completely disable fully selected column behaviors by overriding SelectionLayer#isColumnPositionFullySelected() or by implementing a custom ISelectionModel that overrides the corresponding method. If you only want to avoid the multi column hide, you need to override SelectionLayer#handleColumnHideCommand() like this:

    protected boolean handleColumnHideCommand(ColumnHideCommand command) {
            return super.doCommand(command);
    }

Re: problem with column hide [message #1827427 is a reply to message #1827424]

Thu, 14 May 2020 06:20

Eclipse User

i just override isColumnPositionFullySelected and the result is what i expected.

again, thanks for the fast (and solving) reply!

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