TabFromFocusProxy Class Reference

Description

Propagate tab events from focusProxy to parent.

Definition at line 101 of file CustomEventFilters.h.

Inheritance diagram for TabFromFocusProxy:

Collaboration diagram for TabFromFocusProxy:

Public Member Functions
	TabFromFocusProxy (QWidget *parent=nullptr)
	Passing focus-related events from child widget (e.g. QSpinBox) to parent (e.g. IntEditor) to trigger QTreeView delegate's mechanism to switch editors on "tab" press key. https://stackoverflow.com/questions/12145522/why-pressing-of-tab-key-emits-only-qeventshortcutoverride-event. More...

Protected Member Functions
bool	eventFilter (QObject *obj, QEvent *event) override

Protected Attributes
QWidget *	m_parent

Constructor & Destructor Documentation

TabFromFocusProxy()

TabFromFocusProxy::TabFromFocusProxy

(

QWidget *

parent = nullptr

)

Passing focus-related events from child widget (e.g. QSpinBox) to parent (e.g. IntEditor) to trigger QTreeView delegate's mechanism to switch editors on "tab" press key. https://stackoverflow.com/questions/12145522/why-pressing-of-tab-key-emits-only-qeventshortcutoverride-event.

Definition at line 163 of file CustomEventFilters.cpp.

    : QObject(parent)
    , m_parent(parent)
{
    if (parent->focusProxy())
        parent->focusProxy()->installEventFilter(this);
}

Member Function Documentation

eventFilter()

bool TabFromFocusProxy::eventFilter ( QObject *  obj, QEvent *  event  )

overrideprotected

Definition at line 171 of file CustomEventFilters.cpp.

{
    if (event->type() == QEvent::KeyPress) {
        auto* keyEvent = dynamic_cast<QKeyEvent*>(event);
        if (keyEvent->key() == Qt::Key_Tab || keyEvent->key() == Qt::Key_Backtab) {
            // we are posting event as if m_parent had "tab" key
            QApplication::postEvent(
                m_parent, new QKeyEvent(keyEvent->type(), keyEvent->key(), keyEvent->modifiers()));
 
            // but still let the origin (QSpinBox) to process it
            return false; // process
        }
    }
 
    else if (event->type() == QEvent::FocusOut) {
        auto* focusEvent = dynamic_cast<QFocusEvent*>(event);
        QApplication::postEvent(this, new QFocusEvent(focusEvent->type(), focusEvent->reason()));
 
        // Don't filter because focus can be changed internally in editor
        return false;
    }
 
    return QObject::eventFilter(obj, event);
}

References m_parent.

Member Data Documentation

m_parent

QWidget* TabFromFocusProxy::m_parent

protected

Definition at line 108 of file CustomEventFilters.h.

Referenced by eventFilter().

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The documentation for this class was generated from the following files:

• /home/build/builds/o5h8MZZm/0/mlz/bornagain/GUI/View/Common/CustomEventFilters.h
• /home/build/builds/o5h8MZZm/0/mlz/bornagain/GUI/View/Common/CustomEventFilters.cpp