![]() ![]() Note that QtConcurrent::run does not support calling overloaded functions directly. Changes made to the arguments after calling QtConcurrent::run() are notvisible to the thread. ![]() QFuture future = QtConcurrent:: run(aFunctionWithArguments, integer, floatingPoint, string) Ī copy of each argument is made at the point where QtConcurrent::run() is called, and these values are passed to the thread when it begins executing the function. For example: extern void aFunctionWithArguments( int arg1, double arg2, const QString & string) Passing arguments to the function is done by adding them to the QtConcurrent::run() call immediately after the function name. The unbounded perturbations we consider are the so-called DeschSchappacher perturbations, which arise, e.g., from the boundary perturbations of systems described by partial differential equations. QFuture future = QtConcurrent:: run(&pool, aFunction) Passing Arguments to the Function We analyze the robustness of the exponential stability of infinite-dimensional sampled-data systems with unbounded control operators. To use a dedicated thread pool, you can pass the QThreadPool as the first argument: extern void aFunction () You can use the QFuture and QFutureWatcher classes to monitor the status of the function. This will run aFunction in a separate thread obtained from the default QThreadPool. QFuture future = QtConcurrent:: run(aFunction) ![]() To run a function in another thread, use QtConcurrent::run(): extern void aFunction () The function passed to QtConcurrent::run() may report the result through its return value. This function is a part of the Qt Concurrent framework. In run with promise mode, the function passed to QtConcurrent::run() can make use of the additional QPromise API, which enables multiple result reporting, progress reporting, suspending the computation when requested by the caller, or stopping the computation on the caller's demand. In basic mode, the function passed to QtConcurrent::run() is able to report merely a single computation result to its caller. You can think of these overloads as slightly different modes. QtConcurrent::run() is an overloaded method. The return value of the function is made available through the QFuture API. Optimal control and observation locations for time-varying systems on a finite-time horizon. The correct approach would be to calculate (and cache) the enableWathever values in getter functions, then let the form call the getters and enable or disable its own buttons.The QtConcurrent::run() function runs a function in a separate thread. Ironically the SalesTableForm.enableUpdateJournalButtons method violates this rule, as it accepts button controls as parameters. The controls belongs to the form where they were born and should not be passed around. However this will usually make the form and the class tightly coupled, which is not what we want. The other route (you indicated in the question) would be to inform the class about the existence of the control and let the class call control.value() directly. In this case the SalesTableForm is informed of the change of the checkbox by calling a method parmSpecialAction (name arbitrarily chosen). SalesTableForm.parmSpecialAction(this.value()) You do that in the modified method of the checkbox control: boolean modified() Rather inform the other class when the unbound control is changed. You don't refer to the unbound control from another class, it is not the right approach. ![]()
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