![]() ![]() ![]() In particular, the value function of the optimal control problem given by ( 8) is the unique viscosity solution, see, e.g. It is possible provided that there exists a sufficiently regular triple ( A, f, l) satisfying the equality ( 4). The Hamilton–Jacobi equation ( 6) can be also studied with connection to optimal control problems. ![]() All other trademarks are property of their respective owners.The Hamilton–Jacobi equation ( 6) with a convex Hamiltonian H in the gradient variable can be studied with connection to calculus of variations problems, namely the value function of the calculus of variations problem given by ( 7) is the unique viscosity solution, see, e.g. Qt and respective logos are trademarks of The Qt Company Ltd. The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. If the QBindable is invalid, a default constructed T is returned.ĭocumentation contributions included herein are the copyrights of Returns the underlying property's current value. See also binding, setBinding, and hasBinding. If the property does not have a binding, the returned QPropertyBinding will be invalid. Removes the currently set binding of the underlying property and returns it. QPropertyBinding QBindable:: takeBinding() See also value(), isValid(), isReadOnly(), and setBinding(). ![]() This function has no effect if the QBindable is read-only or invalid. This removes any currenltly set binding from it. Sets the underlying property's value to value. void QBindable:: setValue(const T & value) template QPropertyBinding QBindable:: setBinding( Functor f)Ĭreates a QPropertyBinding from f, and sets it as the underlying property's binding. See also binding, isReadOnly(), and isValid(). Does nothing if the QBindable is read-only or invalid. Sets the underlying property's binding to binding. QPropertyBinding QBindable:: setBinding(const QPropertyBinding & binding) QPropertyBinding QBindable:: makeBinding(const QPropertyBindingSourceLocation & location = QT_PROPERTY_DEFAULT_BINDING_LOCATION) constĬonstructs a binding evaluating to the underlying property's value, using a specified source location. Returns the currently set binding of the underlying property. QPropertyBinding QBindable:: binding() const See also QProperty, QObjectBindableProperty, and Qt Bindable Properties. To make a property that is usable directly without reading through a QBindable use QProperty or QObjectBindableProperty. This constructor should not be used to implement BINDABLE for a Q_PROPERTY, as the resulting Q_PROPERTY will not support dependency tracking. When binding using a lambda, you may prefer to capture the QBindable by value to avoid the cost of calling this constructor in the binding expression. You must use QBindable::value() in binding expressions instead of the normal property READ function (or MEMBER) to enable dependency tracking if the property is not BINDABLE. The property must have a notify signal but does not need to have BINDABLE in its Q_PROPERTY definition, so even binding unaware Q_PROPERTYs can be bound or used in binding expressions. See \l QBindable::QBindable( QObject *obj, const char *property) QBindable:: QBindable( QObject * obj, const char * property)Ĭonstructs a QBindable for the Q_PROPERTY property on obj. Member Function Documentation QBindable:: QBindable( QObject * obj, const QMetaProperty & property) ![]()
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