Hello All,
Working with the Data Set view, I needed to detect when user did change
the width of some column. To my surprise there were no notifications or
events generated by the view.
After some examination I found that the are two classes responsible
for the for handling Data Set Column move / re-size features.
ColumnDraggingTracker and ColumnResizeTracker.
The ColumnDraggingTrackers does send couple event notifications like:
....
controller view changed: #columnMove with: (Array with: columnIndex
with: originalColumnIndex).
or
...
self view triggerEvent: #columnLabelClicked.
.....
however the ColumnResizeTracker does not send any change notifications
or events on the column re-size.
I modified one of the methods for the class as follow:
finishSelectionFor: aPoint
self controller selectUpAt: aPoint.
self controller unlockCallBacks.
self controller view changed: #columnResized with: controller index.
This way i can register as a dependent of the data set view and to know
that sizes were changes and react to it.
First, I would propose that Cincom includes this type of
notifications into all of their Tracker classes.
Second, I wonder if I would be better off triggering an event instead :
.... self view triggerEvent: #columnResized ...
--Mark Pirogovsky
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