I am expecting a bunch of models to be added to a store that is
displayed by a grid. Each model identifies a column in a fixed width
parser. So the user can specify a width for each model and a start and
end position will be calculated for each. This could also happen in
any other order, for instance a user could specify a start and based
off the new start and the existing width if will recalculate the end.
These models are ordered by start-end position. No two can overlap
position. So when the first model in the tree changes from 1-20 start
to 1-22 start, every model is run through a recalculatePosition
method. I need to apply these changes in an efficient fashion. Right
now I'm making these changes in a simple for loop, and after the
changes are made to the given model I call store.update(model) and
continue on to the next model. The current example I am working with
has around 400 items in the store, its taking around 1 minute per edit
to execute the changes and display it on the grid. If the user wanted
to change the width of every item it would take over 7 hours..that is
insane. This is the entire method:
private void resetPositionValues()
{
Long prevEnd = new Long(0);
for (final ColumnDTOModel colModel : contentStore.getModels())
{
if(colModel.getColDTO().getColWidth()>0){
final Long start = prevEnd + 1;
colModel.getColDTO().setColStart(start);
final Long end = (start +
colModel.getColDTO().getColWidth()) - 1;
colModel.getColDTO().setColEnd(end);
prevEnd = end;
colModel.getColDTO().setDirty(true);
}else{
final Long start = prevEnd;
colModel.getColDTO().setColStart(start);
colModel.getColDTO().setColEnd(start);
prevEnd = start;
}
contentStore.update(colModel);
}
contentStore.commitChanges();
}
Is there a way I can applying these changes all at once? Thank you!
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