Howdy all
I am making progress with quite a large application which relies heavily on
Spec2
( but Spec2 is such a big learning curve for me – especially given the
incomplete documentation… 😊)
I am currently struggling with the following issue:
I have a SpTablePresenter which shows a collection of domain objects
(subclassed from Model).
The domain object are instances of ‘Asset’ which is a relatively simple class.
The table works fine.
Now, I need to be able to update some columns , but I don’t think I want to
build a separate form for doing classic CRUD operations.
(There is no need for create or delete functionality – so an in-situ update
seems desirable…).
I’ve made a start using SpStringTableColumn >> beEditable and
#onAcceptEdition:
But I can’t see how to work out what row and column has changed, and how I can
update the corresponding Asset instance(s).
It thought it would be handled using #whenModelChanged: but there are models in
many places (and at several levels in the Spec hierarchy)…
I’ve tried following it all the way down to the adapters and morphs but I can’t
see how the freshly edited cell interacts with the model or announcements.
(BTW - It doesn’t look like the ‘selected item’ features are appropriate since
you can do edits in other rows regardless of what row is/isn’t selected.)
Is there a correct and/or elegant way to detect these cell changes in a
SpTablePresenter and apply them to my domain objects…?
Cheers
Mark
From: Mark O'Donoghue <mark.odonoghue.2...@gmail.com>
Sent: Sunday, 4 July 2021 5:26 PM
To: pharo-users@lists.pharo.org
Subject: Question about Spec2 and SpTablePresenter
Howdy all
I’ve got stuck trying to manage Tables – over 12 hours now and I’m out of
ideas!. ☹
Any observations / suggestions are most welcome…
I’ve been loading small external files of transactions using NeoCSV into Spec2
tables.
I am trying to use Fuel to persist the table contents so that my application
will re-load the working state from where I finished in the last session.
(I’ve opted for Fuel as a simple alternative to having to do the whole object
relational mapping thing.)
The idea is that transactions (and potentially some manual adjustments) will be
processed over time.
(This is preferable to having to reload all files from the beginning evert time
I run the application…)
The Spec2 tables have been working well until I tried to persist them.
I can’t seem to fully re-load them to a previously saved state.
For example - I can restore the essential contents of my table in most
circumstances using:
restoreObjects
“filePresenter1 is a SpTablePresenter”
| objects savedEntry |
objects := CpPersist restoreObjectsFromFileNamed:
'E:\Me\zzzST-Test\demo.fuel'.
recentFileList := objects at: 1.
currFileFilter := objects at: 2.
savedEntry := objects at: 3.
self updateFilterButton: currFileFilter.
filteredFileList := self filterFilesUsing: currFileFilter.
filePresenter1 items: filteredFileList.
savedEntry
ifNotNil: [filePresenter1 selectItem: savedEntry ].
However, if any of the table columns are re-sorted , the re-load operation gets
confused and I can’t get the saved a saved selected item to become selected
again.
(It seems to be confusing the index numbers of the sorted and unsorted lists –
even when I match by contents rather than index.)
(I also created an equality test to ensure equivalent entries are recognised by
the #= operation in the list of the underlying model ).
This all works fine - unless I sort a column!
Since this approach was going to be used on several screens I’d really like to
find a solution.
Cheers
Mark
Perth, Western Australia
