change readonly declared variable to readwrite linux

When they are inherited in classes where multiple inheritance is used, they must come from the first inherited class. The READ, WRITE, and RESET functions can be inherited. In QML, classes with REQUIRED properties cannot be instantiated unless all REQUIRED properties have been set. This is not enforced by moc, and is mostly useful for classes exposed to QML.

The presence of the REQUIRED attribute indicates that the property should be set by a user of the class.Care must be taken never to override a FINAL property. This can be used for performance optimizations in some cases, but is not enforced by moc. The presence of the FINAL attribute indicates that the property will not be overridden by a derived class.A constant property cannot have a WRITE method or a NOTIFY signal.

This constant value may be different for different instances of the object. For a given object instance, the READ method of a constant property must return the same value every time it is called. The presence of the CONSTANT attribute indicates that the property value is constant.Note that QItemDelegate gets and sets a widget's USER property. e.g., QAbstractButton::checked is the user editable property for (checkable) buttons. Normally, there is only one USER property per class (default false). The USER attribute indicates whether the property is designated as the user-facing or user-editable property for the class.Most properties are STORED (default true), but e.g., QWidget::minimumWidth() has STORED false, because its value is just taken from the width component of property QWidget::minimumSize(), which is a QSize. It also indicates whether the property value must be saved when storing the object's state. The STORED attribute indicates whether the property should be thought of as existing on its own or as depending on other values.Instead of true or false, you can specify a boolean member function. The SCRIPTABLE attribute indicates whether this property should be accessible by a scripting engine (default true).Most properties are DESIGNABLE (default true). The DESIGNABLE attribute indicates whether the property should be visible in the property editor of GUI design tool (e.g., Qt Designer).If included, it defines the property and its notifier signal to be used in a particular revision of the API (usually for exposure to QML). Qt emits automatically that signal when needed for MEMBER properties that do not have an explicit setter. The NOTIFY signal should only be emitted when the property has really been changed, to avoid bindings being unnecessarily re-evaluated in QML, for example. The parameter will take the new value of the property. NOTIFY signals for MEMBER variables must take zero or one parameter, which must be of the same type as the property. If defined, it should specify one existing signal in that class that is emitted whenever the value of the property changes. The RESET function must return void and take no parameters. e.g., QWidget::cursor has the typical READ and WRITE functions, QWidget::cursor() and QWidget::setCursor(), and it also has a RESET function, QWidget::unsetCursor(), since no call to QWidget::setCursor() can mean reset to the context specific cursor. It is for setting the property back to its context specific default value.

It's still possible to use READ or WRITE accessor functions in addition to MEMBER variable association (but not both), if you need to control the variable access. This makes the given member variable readable and writable without the need of creating READ and WRITE accessor functions.

A MEMBER variable association is required if no READ accessor function is specified.

e.g., QWidget::focus has no WRITE function. Read-only properties do not need WRITE functions. e.g., QWidget::enabled has the WRITE function QWidget::setEnabled(). It must return void and must take exactly one argument, either of the property's type or a pointer or reference to that type.

A WRITE accessor function is optional.

e.g., QWidget::focus is a read-only property with READ function, QWidget::hasFocus(). Ideally, a const function is used for this purpose, and it must return either the property's type or a const reference to that type.

A READ accessor function is required if no MEMBER variable was specified.

Void textChanged( const QString &newText) Ī property behaves like a class data member, but it has additional features accessible through the Meta-Object System. Q_PROPERTY( QString text MEMBER m_text NOTIFY textChanged) Q_PROPERTY( qreal spacing MEMBER m_spacing NOTIFY spacingChanged) Q_PROPERTY( QColor color MEMBER m_color NOTIFY colorChanged)

Change readonly declared variable to readwrite linux