Method updateCurrentEditor

src/common/widget/variablechooser.cpp:177–228

}

void VariableChooserPrivate::updateCurrentEditor(QWidget *old, QWidget *widget)
{
    Q_UNUSED(old)

    if (!widget)
        return;

    bool handle = false;
    QWidget *parent = widget;
    while (parent) {
        if (parent == q)
            return;
        if (parent == q->parentWidget()) {
            handle = true;
            break;
        }
        parent = parent->parentWidget();
    }
    if (!handle)
        return;

    QLineEdit *previousLineEdit = lineEdit;
    QWidget *previousWidget = currentWidget();
    lineEdit = nullptr;
    auto chooser = widget->property(VariableFlag).value<QWidget *>();
    bool supportsVariables = chooser == q;
    if (auto edit = qobject_cast<QLineEdit *>(widget))
        lineEdit = (supportsVariables && !edit->isReadOnly() ? edit : nullptr);

    QWidget *current = currentWidget();
    if (current != previousWidget) {
        if (previousWidget)
            previousWidget->removeEventFilter(q);
        if (previousLineEdit)
            previousLineEdit->setTextMargins(0, 0, 0, 0);
        if (iconButton) {
            iconButton->hide();
            iconButton->setParent(nullptr);
        }
        if (current) {
            current->installEventFilter(q);   // escape key handling and geometry changes
            int margin = buttonMargin();
            if (lineEdit)
                lineEdit->setTextMargins(0, 0, margin, 0);
            iconButton->setParent(current);
            updateButtonGeometry();
            iconButton->show();
        } else {
            q->hide();
        }
    }
}

void VariableChooserPrivate::updateButtonGeometry()
{