Upps looks like we got of from the List
Tom
Tom Schindl schrieb:
> Hi Gunnar,
>
> Looks like I don't get how this is done.
>
> ----------8<----------
> final QLineEdit l = new QLineEdit()
>
> Thread t = new Thread() {
> public void run() {
> // How do I now call l.setText("Bla Bla");
> }
> };
>
> t.run();
> ----------8<----------
>
> As said I'm very new to QT-Jambi and QT so maybe I've missed the obvious
> thing. In SWT I'd write:
>
> ----------8<----------
> final Text t = new Text(....);
> Thread t = new Thread() {
> public void run() {
> t.getDisplay().asyncExec( new Runnable() {
> public void run() {
> t.setText("Bla Bla");
> }
> });
> }
> };
>
> t.run();
> ----------8<----------
>
> Thanks for your patients.
>
> Tom
>
> Gunnar Sletta schrieb:
>> Tom Schindl wrote:
>>> Hi Gunnar,
>>>
>>> Gunnar Sletta schrieb:
>>>> Tom Schindl wrote:
>>>>
>>>> Hi Tom,
>>>>
>>>>> b) Ask some questions:
>>>>> - How do I sync back from a None-UI-Thread (in databinding this the
>>>>> task of the Realm you see above)
>>>> You sync back to main thread using either queued connections
>>>>
>>>> http://doc.trolltech.com/qtjambi-4.4/html/com/trolltech/qt/qtjambi-signalsandslots.html
>>>>
>>>>
>>>> http://doc.trolltech.com/qtjambi-4.4/html/com/trolltech/qt/core/Qt.ConnectionType.html
>>>>
>>> From reading
>>> http://doc.trolltech.com/qtjambi-4.4/html/com/trolltech/qt/qtjambi-threads.html
>>>
>>> I looks like I can call methods (like QLineEdit#setText) from any thread
>>> I want?
>> This is incorrect. This is specified for instance in the "The Threading
>> Classes" section with:
>> "Note that QCoreApplication::exec() must always be called from the main
>> thread (the thread that executes main()), not from a another thread. In
>> GUI applications, the main thread is also called the GUI thread because
>> it's the only thread that is allowed to perform GUI-related operations."
>>
>>
>>
>>>> or by posting a custom event
>>>>
>>>> http://doc.trolltech.com/qtjambi-4.4/html/com/trolltech/qt/core/QCoreApplication.html#postEvent(com.trolltech.qt.core.QObject,%20com.trolltech.qt.core.QEvent)
>>>>
>>>>
>>>>
>>>>> - How do I find out which thread is the UI-Thread to know when I
>>>>> have
>>>>> sync back to the UI-Thread
>>>> You can always check QApplication.instance().thread() versus
>>>> Thread.currentThread() to see if the two are the same or not. They will
>>>> be the same when you are executing code in the main thread.
>>> If the above statement is appropriate I think I don't need
>>> thread-syncing.
>> you do. You will get threading exceptions when trying to call GUI
>> functionality from the outside the main thread.
>>
>>
>
>
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