[Qt-qml] Starting an external program from QML?

[Kai Koehne]

On 10/25/2010 8:07 AM, ext Raymond de Vries wrote:
> Hi,
>
> That makes sense indeed, stupid of me. Could you point me at an example
> how to use the C++ slot from QML? I have been looking for this but I
> guess I am missing something...

There are actually multiple ways. One is to expose your slot to the QML 
context, see

http://doc.trolltech.com/4.7-snapshot/qtbinding.html#calling-c-methods-from-qml 
.

(The example shows you how to register a named object in the QML 
context. If you don't like the objectName.slot() notation, you should 
have a look at QDeclarativeContext::setContextObject(...)).

Another way (and IMO better style) is to declare a signal in the QML 
root element, and then connect it to the slot in the C++ part, e.g. 
something like:

x.qml:

import QtQuick 1.0
Rectangle {
   signal startAppRequested
   // ...
}

x.cpp:

QDeclarativeView view;
// ...
view.show();
connect(view.rootObject(), SIGNAL(startAppRequested()), this, 
SLOT(runApp());


Regards

Kai


> thanks
> Raymond
>
>
> On 10/25/2010 5:16 AM, Gregory Schlomoff wrote:
>> As far as I know, there is no built-in support in QML for this.
>>
>> You would need to put the code in a C++ slot, and call it from QML.
>>
>> Cheers,
>>
>> Greg
>>
>> On Mon, Oct 25, 2010 at 3:51 AM, Raymond de Vries<reedev at xs4all.nl>   wrote:
>>>    Hi,
>>>
>>> I would like to start an application from QML. I did not find any
>>> documentation about this so can someone please give me some advice?
>>> Starting the application from a button click would be enough.
>>>
>>> thanks a lot
>>> Raymond
>>>
>>> _______________________________________________
>>> Qt-qml mailing list
>>> Qt-qml at trolltech.com
>>> http://lists.trolltech.com/mailman/listinfo/qt-qml
>>>
>
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-- 
Kai Koehne
Software Engineer
Nokia, Qt Development Frameworks

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