Important for newbie!
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this small app(cross platform) demonstrates two new feature coming by qt5. thats to ability connect functor, non member outer class function and lambda function. main.cpp:
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#include "test.h"void outer_func(){std::printf("this is a test by outer class func;)\n");}
void functor::operator() (bool) {std::printf("this is a test by functor;)\n");}int main(int argc,char* argv[]){
QApplication app(argc, argv);
Ui_Form ui;
QWidget* form=new QWidget();
ui.setupUi(form);
form->show();
return app.exec();
}
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test.h:
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#ifndef TEST_H
#define TEST_H#include <QtCore/QVariant>
#include <QtWidgets/QAction>
#include <QtWidgets/QApplication>
#include <QtWidgets/QButtonGroup>
#include <QtWidgets/QHeaderView>
#include <QtWidgets/QPushButton>
#include <QtWidgets/QWidget>
#include <cstdio>void outer_func();
class functor{public:void operator() (bool);};functor a_functor;
class Ui_Form{
public:
QPushButton *pushButton;
void setupUi(QWidget *Form){Form->setObjectName(QStringLiteral("Form")); Form->resize(600, 100); pushButton = new QPushButton(Form); pushButton->setObjectName(QStringLiteral("pushButton")); pushButton->setGeometry(QRect(10, 50, 580, 33)); pushButton->connect(pushButton,&QAbstractButton::clicked,outer_func); pushButton->connect(pushButton,&QAbstractButton::clicked,a_functor); pushButton->connect(pushButton,&QAbstractButton::clicked,[=] (bool){std::printf("This is a test by lambda;)\n");}); Form->setWindowTitle(QString("Form")); pushButton->setText(QString("connect functor and outer class func simultaneously")); } // setupUi};
#endif // TEST_H
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test.pro
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TEMPLATE = app
TARGET = test
INCLUDEPATH += .
QT += widgets
QMAKE_CXXFLAGS += -std=c++11 #needed for lambda
HEADERS += test.h
SOURCES += main.cpp
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