Some basic shortcuts have been defined in main.qml

The basics are in place. What still needs to happen is:

• Keep webengineview from stealing focus. This will require qt 5.8 unfortunately.
• We need a concept on how to deal with list/tree views. I'm not sure the view itself needs to acquire focus itself, perhaps it is enough if the first delegate (or the currently active) immediately gains focus. There is however currently no visual indicator that the delegate now has focus, in addition to being selected (meaning the focus just disappears when tabbing through).

Switching between items is then done using the arrow keys (for as long as the view has focus).
Essentially we therefore need a way to distinguish whether the focus is on the folder list, the mail list, the conversation, or one of the visible buttons.

• Shortcuts are not handled yet. We probably want some window-specific shortcuts for common actions such as:
  • Go to folder (with search)
  • got to next/prev folder in list
  • go to next/prev conversation in list
  • go to next/prev mail in conversation (perhaps this one is not necessary as it can be solved over focus + normal keyboard navigation)a
• The shortcuts are there to trigger actions even if the qml item doesn't have active focus.
• Keyboard navigation with arrows needs to be manually implemented. I.e. pressing right in the folder list should probably throw you into the maillist

One of the open problems is that there is no highlighting for the column you in. Additionally it's not always possible to distinguish between a list item that is selected and one that has focuse.

Case in point:
If you have mail A selected in the maillistview and shift the focus from the folderview over to the maillistview, which results in the first delegate (mail A) being selected, then you won't see any difference as mail A is already selected. This gives the impression that the focus is lost.

The same goes for the folderview, the only thing that does have a clear highlight is the "New Mail" button

Other problems:

• Accountswitcher shows no highlight
• View switcher buttons are not selectable

Moving to 0.4, this is too much effort for now and qt 5.9 should at least resolve the focus stealing.

This is largely resolved by now I think. I don't have webengine 5.9 available yet, so the webview still keeps stealing the focus, but keyboard navigation and focus highlighting is quite usable by now.