[Development] Application wide shortcuts API for QML

Mark markg85 at gmail.com
Tue Dec 11 21:04:36 CET 2012

On Tue, Dec 11, 2012 at 8:46 PM, Mark <markg85 at gmail.com> wrote:
> On Tue, Dec 11, 2012 at 8:04 PM, Rick Stockton
> <rickstockton at reno-computerhelp.com> wrote:
>> On 12/11/2012 12:53 AM, Mark wrote:
>>> Hi,
>>> Alan' posts about possible future APIs made me want to post this as
>>> well. In the QWidget works we have the rather nice QShortcut class to
>>> aid us in defining application wide shortcuts.
>>> Functionality like that is completely missing from the current QtQuick
>>> in both Qt 4.8 (1.1) and 5.0 (2.0). For desktop based applications an
>>> API like that would be very much needed since applications need to
>>> have the ability to define app wide shortcuts.
>>> I already made an API for exactly this reason which can be found here [1].
>>> The API itself should look somewhat like this:
>>> Shortcut {
>>>     QKeySequence key
>>>     signal activated
>>> }
>>> Obviously if this is going to happen then mouse shortcuts should be
>>> included as well. Right now Qt itself has no possibility of defining a
>>> shortcut like "CTRL + LEFT MOUSE BUTTON" (or i don't know of it's
>>> possibility).
>> From the get-go, I'm not sure that it's desirable to take away the
>> opportunity for users to install a different even filter at the QApp
>> level....
>> But I took your code and added logic to do this kind of event (which is
>> only a single event, quite easy). My "code" also supports an emacs-like
>> sequence of one mouse event (with or without modifier keys), followed by
>> a single key (as in your code). one keyboard. But I'm unsure whether we
>> want to have the GUI-related mouse support in the same Class as the
>> keyboard shortcuts, which could apply to console applications as well
>> (both QML and non-QML). First, however, I need to make it compile
>> succesfully: I am (so far) unable to convert 'QEvent::Type' enum values
>> into QVariant, and I'm unsure why all variables are being defined as
>> QVariant in the first place (i.e., instead of specific datatypes.)
>> I know that you busy with a new job :)) If you can assist, however,
>> please advise. Same goes for everyone else - Alan? My time is relatively
>> unlimited for the next week, but I'm an incompetent programmer.
>>> The signal gets emitted when the sequence has been pressed. The
>>> current implementation as written on the blog post in [1] works like a
>>> charm in my case :)
>>> [1] http://kdeblog.mageprojects.com/2012/12/07/application-wide-shortcuts-in-qml-this-time-without-qshortcut/
> I don't know why everything is QVariant based, but i "might" know how
> to get an enum in a QVariant. Would Q_DECLARE_METATYPE(QEvent::Type)
> work? Found that one here:
> http://qt-project.org/forums/viewthread/6738
> I haven't tested it yet..

Nvm the enum idea.. doesn't work :(

Really guys.. How can you expose an emun from a class that you're
inheriting from to QML?
For example:

class Shortcut : public QObject, public QKeySequence

Has the enum: StandardKey in the public part of QKeySequence yet i
cannot access it in QML by calling Shortcut.Save (or any of the
Shortcut enum values..
It does work when i RE-define the enum like so:

class Shortcut : public QObject, public QKeySequence
    enum StandardKey{

I just want to access the StandardKey enum in QML _without_ copying it
from QKeySequence.

More information about the Development mailing list