Qt学习例子4——Test2_1

此工程（在QtCreator下建的工程）包含了几个类，dialog类、designerwidget类、multichoicewindow类、calculator类。

其中dialog类和designerwidget类都是用于测试槽的使用，dialog类是代码显示的ui，而designerwidget是用ui设计的界面。

Multichoicewindow 类更为复杂，主要功能是区分模态对话框和非模态对话框

Calculator是一个简单的计算器

 

代码如下：

 

//Designerwidget.h

#ifndef DESIGNERWIDGET_H

#define DESIGNERWIDGET_H

#include <QWidget>

#include <QMessageBox>

namespace Ui {

    class DesignerWidget;

}

class DesignerWidget : public QWidget

{

    Q_OBJECT

public:

    explicit DesignerWidget(QWidget *parent = 0);

    ~DesignerWidget();

private slots:

    void on_pushButton_clicked();

    void on_lineEdit_returnPressed();

private:

    Ui::DesignerWidget *ui;

};

#endif // DESIGNERWIDGET_H

 

// Designerwidget.cpp

#include "designerwidget.h"

#include "ui_designerwidget.h"

DesignerWidget::DesignerWidget(QWidget *parent) :

    QWidget(parent),

    ui(new Ui::DesignerWidget)

{

    ui->setupUi(this);

}

DesignerWidget::~DesignerWidget()

{

    delete ui;

}

void DesignerWidget::on_pushButton_clicked()

{

    QMessageBox::information(this, "Message", "The text entered in the "

            "manual widget window is:/n" + ui->lineEdit->text());

}

void DesignerWidget::on_lineEdit_returnPressed()

{

    QMessageBox::information(this, "Message", "The text entered in the "

            "manual widget window is:/n" + ui->lineEdit->text());

}

 

 

// Designerwidget.ui

 

//Dialog.h

#ifndef DIALOG_H

#define DIALOG_H

#include <QDialog>

#include <QtGui/QLineEdit>

class Dialog : public QDialog

{

    Q_OBJECT

public:

    explicit Dialog(QWidget *parent = 0);

private:

    QLineEdit *m_lineEdit;

    QPushButton *m_pbtn;

signals:

public slots:

private slots:

    void showMessage(void);

};

#endif // DIALOG_H

 

 

//Dialog.cpp

#include <QtGui>

#include "dialog.h"

Dialog::Dialog(QWidget *parent) :

    QDialog(parent)

  ,m_lineEdit(new QLineEdit)

{

    QHBoxLayout *topLayout = new QHBoxLayout();

    m_pbtn=new QPushButton("OK");

    topLayout->addWidget(new QLabel("EnterText:"));

//    topLayout->addWidget(new QLineEdit);

    topLayout->addWidget(m_lineEdit);

    topLayout->addWidget(m_pbtn);

    setLayout(topLayout);

    //this->findChild<QPushButton *>("pushbutton")

    //connect(m_pbtn,SIGNAL(clicked()),this,SLOT(showMessage()));

    connect(m_lineEdit,SIGNAL(returnPressed()),this,SLOT(showMessage()));

}

void Dialog::showMessage(void)

{

    QMessageBox::information(this, "Message", "The text entered in the "

            "manual widget window is:/n" + m_lineEdit->text());

}

//calculator.h

#ifndef CALCULATOR_H

#define CALCULATOR_H

#include <QWidget>

namespace Ui {

    class calculator;

}

class calculator : public QWidget

{

    Q_OBJECT

public:

    explicit calculator(QWidget *parent = 0);

    ~calculator();

private:

    Ui::calculator *ui;

};

#endif // CALCULATOR_H

//calculator.cpp

#include "calculator.h"

#include "ui_calculator.h"

calculator::calculator(QWidget *parent) :

    QWidget(parent),

    ui(new Ui::calculator)

{

    ui->setupUi(this);

}

calculator::~calculator()

{

    delete ui;

}

//calculator.ui

//multichoicewindow.h

#ifndef MULTICHOICEWINDOW_H

#define MULTICHOICEWINDOW_H

#include <QWidget>

namespace Ui {

    class MultiChoiceWindow;

}

class MultiChoiceWindow : public QWidget

{

    Q_OBJECT

public:

    explicit MultiChoiceWindow(QWidget *parent = 0);

    ~MultiChoiceWindow();

private slots:

    void on_pushButton_clicked();

private:

    Ui::MultiChoiceWindow *ui;

};

#endif // MULTICHOICEWINDOW_H

//multichoicewindow.cpp

#include "multichoicewindow.h"

#include "ui_multichoicewindow.h"

#include "designerwidget.h"

#include "dialog.h"

MultiChoiceWindow::MultiChoiceWindow(QWidget *parent) :

    QWidget(parent),

    ui(new Ui::MultiChoiceWindow)

{

    ui->setupUi(this);

}

MultiChoiceWindow::~MultiChoiceWindow()

{

    delete ui;

}

void MultiChoiceWindow::on_pushButton_clicked()

{

    QWidget *w=0;

       if(ui->radioManual->isChecked())

           //w = new ManualWidget();

           w = new Dialog();

       else

           w = new DesignerWidget();

       if(ui->radioModal->isChecked())

           w->setWindowModality(Qt::ApplicationModal); //set modal dialog

       w->setWindowTitle(ui->titleEdit->text());

       w->show();

}

//multichoicewindow.ui

 

//main.cpp

 

 

//#include <QtCore/QCoreApplication>

#include <QApplication>

#include "dialog.h"

#include "designerwidget.h"

#include "multichoicewindow.h"

#include "calculator.h"

int main(int argc, char *argv[])

{

QApplication a(argc, argv);

MultiChoiceWindow mc;

mc.show();

return a.exec();

}

 

 

 

程序运行结果图：