Automatize QDialog actions

[danividanivi]

Hello,

I am adapting an existing software to be embedded.
It is developed with C++ and Qt.

From the main user interface, a Dialog opens, I have to click down arrow and then Enter to select an item from a list.
As no keyboard or mouse will be available, I have to automatize those two button clicks.

My try was to this code:

df.exec();
QKeyEvent *event = new QKeyEvent ( QEvent::KeyPress, Qt::Key_Down, Qt::NoModifier);
QCoreApplication::postEvent (QApplication::focusWidget(), event);

QKeyEvent *event2 = new QKeyEvent ( QEvent::KeyPress, Qt::Key_Enter, Qt::NoModifier);
QCoreApplication::postEvent (QApplication::focusWidget(), event2);

I tried replacing QApplication::focusWidget() with QApplication::activeModalWidget() and some other things but without any luck, dialog opens but nothing is pressed, it keeps waiting for manual intervention.

What is the correct way of doing this?

[mrjj]

Hi
the df.exec() is blocking. meaning it stay there until ok/cancel pressed and dialog closes so
the postEvent will run after :)

I was wondering if u cant directly get the Action and trigger it when dialog opens ?
Else, you can make a timer and send dialog a signal to make it select and trigger some action.

[danividanivi]

@mrjj I understand, so code under df.exec() will never run.
"I was wondering if u cant directly get the Action and trigger it when dialog opens ?"
I tried inserting the code in the dialog constructor but it is also not working, so I don't think so.
Could you explain the timer workaround?
Thank you for your help

[mrjj]

@danividanivi
Hi
Well postEvent will run after exec() terminates. ( its local event loop)
The code will not likely work in constructor as dialog is not visible yet.

You can try ( in ctor of dialog)
QTimer::singleShot(1000, {
QKeyEvent *event = new QKeyEvent ( QEvent::KeyPress, Qt::Key_Down, Qt::NoModifier);
QCoreApplication::postEvent (QApplication::focusWidget(), event);

QKeyEvent *event2 = new QKeyEvent ( QEvent::KeyPress, Qt::Key_Enter, Qt::NoModifier);
QCoreApplication::postEvent (QApplication::focusWidget(), event2);
} );

But im wondering how you have the QActions ?
You cant directly find it and run its trigger() ?

[SGaist]

Hi,

To add to @mrjj, did you consider using QDialog::open ?

[danividanivi]

@mrjj the timer singleShot solution is working like a charm!

QTimer::singleShot(1000, []() {
      QKeyEvent *event = new QKeyEvent ( QEvent::KeyPress, Qt::Key_Down, Qt::NoModifier);
      QKeyEvent *event2 = new QKeyEvent ( QEvent::KeyPress, Qt::Key_Enter, Qt::NoModifier);
      QCoreApplication::postEvent (QApplication::focusWidget(), event);
      QCoreApplication::postEvent (QApplication::focusWidget(), event2);} );

The code for QActions is complex so I am glad I don't have to find things there and run the triggers.
@SGaist I thought about that but it was creating an empty dialog, maybe I didn't implement it properly.

In any case now this is working as expected, thank you both very much.

[mrjj]

@danividanivi
Ok super.
To sleep good at night, i think i would check that correct widget have focus
before sending enter to avoid some day it might find the close dialog button or something later on :)