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Created attachment 281416 [details] Screenshot when stopping the cursor a first time When too many tabs are opened, some are not directly displayed. A button with a double arrow (">>") above a number indicating the number of tabs displays to the right of the tab strip. When clicking this button, a yellow drop-down is displayed showing all tabs in that tab group. When one of the tabs is hovered, a tooltip appears showing its full name (generally, the file's relative path). However, this very useful feature does not work initially. When the cursor stops over a first tab, the tooltip does not appear, as can be seen in the attached screenshot. If the cursor is then moved to a different tab, the tooltip for that second tab shows. From that point, tooltips will show for all tabs hovered, even if the cursor goes back to the first tab which was hovered, but only as long as Show List is open. By the way, it appears that these tooltips never show when the list is navigated using the keyboard (Down/Up arrows). This affects Eclipse for PHP Developers (PDT) 2019-12 on Windows 8.
Reproducible with I20200106-0600 on Windows 10. And I can add another related shortcoming (not yet sure it is worth a separate bug). After a tooltip was shown in the drop-down list hover over one of the visible tabs (the tab itself and not in the list and without closing the drop-down). Afterwards all tooltips from the drop-down list are rendered below the drop-down list and therefor mostly unreadable.
(In reply to Paul Pazderski from comment #1) > Reproducible with I20200106-0600 on Windows 10. Thank you Paul > > And I can add another related shortcoming (not yet sure it is worth a > separate bug). > After a tooltip was shown in the drop-down list hover over one of the > visible tabs (the tab itself and not in the list and without closing the > drop-down). Afterwards all tooltips from the drop-down list are rendered > below the drop-down list and therefor mostly unreadable. I confirm on my environment. By the way, to slightly rectify my report, it is not necessary for a first tooltip to appear to hover over a different tab. Moving the cursor while staying over the first hovered tab suffices.
Created attachment 281418 [details] Screenshot when stopping the cursor a first time Oops, only keep relevant screen