Qt线程学习 一个QThread例子

一个QThread例子

//threadTest.h
#ifndef THREADTEST_H
#define THREADTEST_H

#include <qthread.h>
#include "test.h"

class MyThread : public QThread
{
protected :
virtual void run();
};

MyThread myThread;

void Test::newSlot()
{
myThread.start();
}

#endif

////////////////////////////////

//threadTest.cpp

#include <QDialog>

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 <qvariant.h>
#include <qlineedit.h>
#include <qpushbutton.h>
#include <qtextedit.h>
#include <qlayout.h>
#include <qtooltip.h>
#include <qwhatsthis.h>
#include <qimage.h>
#include <qpixmap.h>
#include <QVBoxLayout>

/*
* 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 <qvariant.h>
#include <qwidget.h>

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 <qapplication.h>
#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();
}

/////////////

调试运行

gdb *.exe

run step点击按钮就可以看到输出调试信息