[KDE/Mac] new year's resolution: opening files "the Mac way" (TM)

[Christoph Cullmann]

Hi,

> Hi,
> 
> 
> I have gotten a bit further. As I thought it is critical to have a correct
> Info.plist (or else the event is never sent), and it isn't trivial to edit that
> file "in place" and have the system recognise its new content (easiest way is
> to copy the entire app bundle in the Finder).
> 
> You also need to set a flag (LSMultipleInstancesProhibited) in the Info.plist to
> avoid launching multiple copies; for some reason the mechanism that is in place
> to prevent that doesn't work when you drop a document on Kate's app icon in the
> Finder (or the Dock). So:
> 
>     <key>NSPrincipalClass</key>
>     <string>NSApplication</string>
>     <key>NSSupportsAutomaticGraphicsSwitching</key>
>     <true/>
>     <key>LSMultipleInstancesProhibited</key>
>     <true/>
>     <key>CFBundleDocumentTypes</key>
>     <array>
>          <dict>
>               <key>CFBundleTypeExtensions</key>
>               <array>
>                    <string>*</string>
>               </array>
>               <key>CFBundleTypeName</key>
>               <string>NSStringPboardType</string>
>               <key>CFBundleTypeRole</key>
>               <string>Editor</string>
>          </dict>
>     </array>
> 
> (The NSSupportsAutomaticGraphicsSwitching comes from QtCreator; I haven't check
> what it does exactly but it shouldn't harm).
Thanks for the hint with the plist file!

> 
> With this, I see the events arrive in kate's main.cpp when I add the following:
> 
> #include <QFileOpenEvent>
> class FileOpenHandler : public QObject
> {
>    Q_OBJECT
> public:
>    FileOpenHandler(QObject *parent=Q_NULLPTR)
>        : QObject(parent)
>    {}
>    bool eventFilter(QObject *obj, QEvent *event)
>    {
>        if (event->type() == QEvent::FileOpen) {
>            QFileOpenEvent *foe = static_cast<QFileOpenEvent*>(event);
>            qDebug() << Q_FUNC_INFO << "FileOpen event" << foe;
>            // call KateApp::openUrl(foe->url() ...) from here
>            return true;
>        } else {
>            return QObject::eventFilter(obj, event);
>        }
>    }
> };
> 
> and then just before starting the main loop:
> 
> #ifdef Q_OS_OSX
>    FileOpenHandler *fileOpenHandler = new FileOpenHandler(qApp);
>    qApp->installEventFilter(fileOpenHandler);
> #endif
I have added this now just to KateApp.

https://quickgit.kde.org/?p=kate.git&a=commit&h=cd6ec201725cf627a336015d472c39f5ff73b2a7

> 
> Question is: what about the encoding parameter?
Can be just set to empty QString like done in my commit above.

> 
> Also, for a local/MacPorts KDE4 implementation of this : if I add a signal to
> the KApplication class, do I need to rebuild all dependents to avoid
> ABI-related crashing, or only those that are modified to connect to the new
> signal?
> (IOW, can you add a signal to a class without breaking backwards compatibility?)
Signal adding should be binary compatible, but I doubt that is a good idea.

Why not just add the matching code to the applications you want to have support?
They will anyway need adjustments.

Greetings
Christoph

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----------------------------- Dr.-Ing. Christoph Cullmann ---------
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