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Marc Reilly authored
Hover handlers now have a priority which is used to determine which handler's tooltip is shown. The handler with the highest priority is used, or, in the case of equal rankings, the first registered handler. The base handler implements a default basic priority system based on the diagnostic and help properties. Derived handlers can manually set the ranking value as part of the identifyMatch() call. A new checkToolTip() method is added so the handler can analyze whether a tooltip is valid without it being shown. Change-Id: I9d82fb9cc52f1d3cd53a8b197d75cd923651b79d Reviewed-by: David Schulz <david.schulz@theqtcompany.com>
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