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    <p>Although it's not possible directly using Qt, some binding/currying is available through <a href="http://libqxt.org" rel="nofollow">LibQxt</a>. For example and from the docs of <a href="http://dev.libqxt.org/libqxt/src/2dd3424cb69d/src/core/qxtboundfunction.h" rel="nofollow">QxtBoundFunction</a>:</p> <blockquote> <p>By far, the most common expected use is to provide a parameter to a slot when the signal doesn't have offer one. Many developers new to Qt try to write code like this: \code connect(button, SIGNAL(clicked()), lineEdit, SLOT(setText("Hello, world"))); \endcode Experienced Qt developers will immediately spot the flaw here. The typical solution is to create a short, one-line wrapper slot that invokes the desired function. Some clever developers may even use QSignalMapper to handle slots that only need one int or QString parameter.</p> <p>QxtBoundFunction enables the previous connect statement to be written like this: \code connect(button, SIGNAL(clicked()), QxtMetaObject::bind(lineEdit, SLOT(setText(QString)), Q_ARG(QString, "Hello, world!"))); \code This accomplishes the same result without having to create a new slot, or worse, an entire object, just to pass a constant value.</p> <p>Additionally, through the use of the QXT_BIND macro, parameters from the signal can be rearranged, skipped, or passed alongside constant arguments provided with the Q_ARG macro. This can be used to provide stateful callbacks to a generic function, for example.</p> <p>Many kinds of functions can be bound. The most common binding applies to Qt signals and slots, but standard C/C++ functions can be bound as well. Future development may add the ability to bind to C++ member functions, and developers can make custom QxtBoundFunction subclasses for even more flexibility if necessary.</p> </blockquote> <p>Although I have submitted some patches to LibQxt, I haven't used this directly so your mileage may vary. </p>
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