Option to conditionally disable selection on some rows

While a table may generally want to use the ember-table row selection features, sometimes we want some rows to be selectable and some to not be. For example, I may have a collapsable tree where I only want the leaf nodes to be selectable and not the collapsable parent rows.

Right now the way I'm handling this is to hide the .et-toggle-select on these rows with CSS and then override the onClick action for the table rows to ignore clicks on the rows where I've hidden the selection checkbox.

It seems that it would be better if we could pass some option to ember-tr to disable row selection for some rows.

Start at the ember-tr row-selection behavior and the table-row onClick path, using the existing .et-toggle-select handling as context. Define the option's expected behavior for mixed selectable and non-selectable rows, then add coverage showing that parent rows can be disabled while leaf rows remain selectable.