focusNextChild Segmentatiion Fault

[croscato]

Installing the eventFilter in my own class give me the possibily to handle all kinds of events in one central location. And the Qt documentation doesn't point this as bad habit, nor recomend against it.

Qt Creator use this kind of eventFilter control (src/plugins/coreplugin/locator/locatorwidget.cpp), see line 262.

// We set click focus since otherwise you will always get two popups
m_fileLineEdit->setButtonFocusPolicy(Utils::FancyLineEdit::Left, Qt::ClickFocus);
m_fileLineEdit->setAttribute(Qt::WA_MacShowFocusRect, false);
m_fileLineEdit->installEventFilter(this);
this->installEventFilter(this);

// We set click focus since otherwise you will always get two popups
m_fileLineEdit->setButtonFocusPolicy(Utils::FancyLineEdit::Left, Qt::ClickFocus);
m_fileLineEdit->setAttribute(Qt::WA_MacShowFocusRect, false);
m_fileLineEdit->installEventFilter(this);
this->installEventFilter(this);

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The error persists calling QObject::eventFilter or QDialog::eventFilter.

Oddly enough this same code runs correctly under Qt 5.3.1 in windows. It's seems that it could be related to the linux version of Qt.

I track the error to a QPaintEvent using gdb.

Anyway thanks for the help.

[wysota]

Installing the eventFilter in my own class give me the possibily to handle all kinds of events in one central location.

In such case you should reimplement event() for the object. All events pass through there before reaching their respective event handlers. Installing an event filter on yourself is not a good solution. And in your particular case you are handling one type of event so there is no reason not to put it in keyPressEvent().

Maybe you should state what exactly you are trying to do?