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 :)