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        二級(jí)考試C++基礎(chǔ)QThread基礎(chǔ)實(shí)例
        
            
        
              
        
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//threadTest.h
            #ifndef THREADTEST_H
            #define THREADTEST_H
            #include 
            #include "test.h"
            class MyThread : public QThread
            {
            protected :
            virtual void run();
            };
            MyThread myThread;
            void Test::newSlot()
            {
            myThread.start();
            }
            #endif
            //threadTest.cpp
            #include 
            void MyThread::run()
            {
            for(int i=0;i <100;i++)
            {
            printf("new value i is:%d",i);
            //QMessageBox::information(this,tr("info"),tr("load dll OK!"));
            //QMessageBox::information(this, tr("Empty Search "),"click Find.");
            //Test m;
            //m.show();
            qDebug("mhf");
            }
            /*
            QDialog *dialog = new QDialog(0,”popup”,FALSE);
            dialog->setCaption(“A QDialog Window”);
            dialog->setMinimumSize(200,80);
            dialog->setMaximumSize(200,80);
            dialog->show();
            */
            }
            //test.cpp
            #include "test.h"
            #include 
            #include 
            #include 
            #include 
            #include 
            #include 
            #include 
            #include 
            #include 
            #include 
            /*
            * Constructs a Test as a child of ’parent’, with the
            * name ’name’ and widget flags set to ’f’.
            */
            Test::Test( QWidget* parent ): QWidget( parent=0 )
            {
            this->setWindowTitle("w");
            this->resize(250, 50);
            textEdit1 = new QTextEdit( "textEdit1" );
            textEdit1->setGeometry( QRect( 10, 60, 570, 291 ) );
            lineEdit1 = new QLineEdit( "lineEdit1" );
            lineEdit1->setGeometry( QRect( 10, 360, 571, 31 ) );
            pushButton2 = new QPushButton( "pushButton2" );
            pushButton2->setGeometry( QRect( 380, 400, 201, 41 ) );
            pushButton1 = new QPushButton( "pushButton1" );
            pushButton1->setGeometry( QRect( 10, 10, 261, 41 ) );
            //languageChange();
            resize( QSize(600, 480).expandedTo(minimumSizeHint()) );
            // signals and slots connections
            connect( pushButton1, SIGNAL( clicked() ), this, SLOT( newSlot() ) );
            connect( pushButton2, SIGNAL( clicked() ), this, SLOT( languageChange() ) );
            //add
            QVBoxLayout *layout=new QVBoxLayout;
            layout->addWidget(textEdit1);
            layout->addWidget(lineEdit1);
            layout->addWidget(pushButton1);
            layout->addWidget(pushButton2);
            this->setLayout(layout);
            this->resize(350, 200);
            }
            /*
            * Destroys the object and frees any allocated resources
            */
            Test::~Test()
            {
            // no need to delete child widgets, Qt does it all for us
            }
            /*
            * Sets the strings of the subwidgets using the current
            * language.
            */
            void Test::languageChange()
            {
            this->setWindowTitle("m");
            //printf("new value i is");
            pushButton2->setText( tr( "pushButton2" ) );
            pushButton1->setText( tr( "pushButton1" ) );
            }
            //test.h
            #ifndef TEST_H
            #define TEST_H
            #include 
            #include 
            class QVBoxLayout;
            class QHBoxLayout;
            class QGridLayout;
            class QLineEdit;
            class QPushButton;
            class QTextEdit;
            class Test : public QWidget
            {
            Q_OBJECT
            public:
            Test( QWidget* parent = 0 );
            ~Test();
            QTextEdit* textEdit1;
            QLineEdit* lineEdit1;
            QPushButton* pushButton2;
            QPushButton* pushButton1;
            public slots:
            virtual void newSlot();
            protected:
            protected slots:
            virtual void languageChange();
            };
            #endif // TEST_H
            main.cpp
            #include 
            #include "test.h"
            int main( int argc, char ** argv )
            {
            QApplication a( argc, argv );
            Test w;
            w.show();
            a.connect( &a, SIGNAL( lastWindowClosed() ), &a, SLOT( quit() ) );
            return a.exec();
            }
            /////////////
            調(diào)試運(yùn)行
            gdb *.exe
            run step點(diǎn)擊按鈕就可以看到輸出調(diào)試信息。