[Interest] QEvent::FileOpen : opening single vs. multiple documents

Jake Petroules Jake.Petroules at qt.io
Sat Jan 27 21:24:04 CET 2018

NSApplicationDelegate has a method which is called when a request to open multiple files is made.


Qt does indeed enumerate the files in this list and issue a separate file open event for each: https://github.com/qt/qtbase/blob/5.10/src/plugins/platforms/cocoa/qcocoaapplicationdelegate.mm#L297

What we should do instead is allow QFileOpenEvent to store a list of files instead of just a single one. Trying to re-group the events after the fact is probably not a good idea.

> On Jan 27, 2018, at 10:34 AM, René J.V. Bertin <rjvbertin at gmail.com> wrote:
> Hi,
> Judging from the behaviour of native Mac applications like Preview.app there must be a distinction in the LaunchServices messages being sent when the user requests the opening of a single document vs. a collection of documents. Preview.app for instance will open a new window for each request, containing all the documents of that request in individual tabs.
> Qt doesn't seem to allow that but sends QFileOpenEvents for each individual document. In my experience one can typically do a QCoreApplication::processEvents() immediately after installing the event filter to catch all documents "with which" the application was launched. Has anyone found a simple way to regroup subsequent QFileOpenEvents?
> Thanks,
> R.
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Jake Petroules - jake.petroules at qt.io
The Qt Company - Silicon Valley
Qbs build tool evangelist - qbs.io

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