1.

 

2. dialog.h 头文件

#ifndef DIALOG_H#define DIALOG_H#include 
    
     QT_BEGIN_NAMESPACEclass QLabel;class QErrorMessage;QT_END_NAMESPACEclass Dialog : public QDialog{    Q_OBJECTpublic:    Dialog(QWidget *parent = 0);private slots:    void getAge();    void getStature();    void getSex();    void getName();    void getColor();    void getFont();    void getCriticalMessage();    void getInformationMessage();    void getQuestionMessage();    void getWarningMessage();    void getErrorMessage();private:    QLabel *nameLabel;    QLabel *sexLabel;    QLabel *ageLabel;    QLabel *statureLabel;    QLabel *colorLabel;    QLabel *fontLabel;    QLabel *criticalLabel;    QLabel *informationLabel;    QLabel *questionLabel;    QLabel *warningLabel;    QLabel *errorLabel;    QErrorMessage *errorMessageDialog;};#endif
    

3. dialog.cpp源文件

#include 
    
     #include "dialog.h"#define MESSAGE \    Dialog::tr("
     
Message boxes have a caption, a text, " \               "and any number of buttons, each with standard or custom texts." \               "
     
Click a button to close the message box. Pressing the Esc button " \               "will activate the detected escape button (if any).")Dialog::Dialog(QWidget *parent)    : QDialog(parent){    setWindowTitle(tr("Standard Dialogs"));    errorMessageDialog = new QErrorMessage(this);    int frameStyle = QFrame::Sunken | QFrame::Panel;    //Name    nameLabel = new QLabel;    nameLabel->setFrameStyle(QFrame::Sunken | QFrame::Panel);    QPushButton *nameButton = new QPushButton(tr("&Name"));    //Sex    sexLabel = new QLabel;    sexLabel->setFrameStyle(frameStyle);    QPushButton *sexButton = new QPushButton(tr("&Sex"));    //Age    ageLabel = new QLabel;    ageLabel->setFrameStyle(frameStyle);    QPushButton *ageButton = new QPushButton(tr("&Age"));    //Stature    statureLabel = new QLabel;    statureLabel->setFrameStyle(frameStyle);    QPushButton *statureButton = new QPushButton(tr("S&tature"));    //Color    colorLabel = new QLabel;    colorLabel->setFrameStyle(frameStyle);    QPushButton *colorButton = new QPushButton(tr("&Color"));    //Font    fontLabel = new QLabel;    fontLabel->setFrameStyle(frameStyle);    QPushButton *fontButton = new QPushButton(tr("&Font"));    //Critical MessageBox    criticalLabel = new QLabel;    criticalLabel->setFrameStyle(frameStyle);    QPushButton *criticalButton =            new QPushButton(tr("Critica&l"));    //Information MessageBox    informationLabel = new QLabel;    informationLabel->setFrameStyle(frameStyle);    QPushButton *informationButton =            new QPushButton(tr("&Information"));    //Question MessageBox    questionLabel = new QLabel;    questionLabel->setFrameStyle(frameStyle);    QPushButton *questionButton =            new QPushButton(tr("&Question"));    //Warning MessageBox    warningLabel = new QLabel;    warningLabel->setFrameStyle(frameStyle);    QPushButton *warningButton = new QPushButton(tr("&Warning"));    //Error MessageBox    errorLabel = new QLabel;    errorLabel->setFrameStyle(frameStyle);    QPushButton *errorButton =            new QPushButton(tr("Show &Message"));    connect(ageButton, SIGNAL(clicked()), this, SLOT(getAge()));    connect(statureButton, SIGNAL(clicked()), this, SLOT(getStature()));    connect(sexButton, SIGNAL(clicked()), this, SLOT(getSex()));    connect(nameButton, SIGNAL(clicked()), this, SLOT(getName()));    connect(colorButton, SIGNAL(clicked()), this, SLOT(getColor()));    connect(fontButton, SIGNAL(clicked()), this, SLOT(getFont()));    connect(criticalButton, SIGNAL(clicked()), this, SLOT(getCriticalMessage()));    connect(informationButton, SIGNAL(clicked()),            this, SLOT(getInformationMessage()));    connect(questionButton, SIGNAL(clicked()), this, SLOT(getQuestionMessage()));    connect(warningButton, SIGNAL(clicked()), this, SLOT(getWarningMessage()));    connect(errorButton, SIGNAL(clicked()), this, SLOT(getErrorMessage()));    //Setup Layout    QGridLayout *layout = new QGridLayout;    layout->setColumnStretch(1, 1);    layout->setColumnMinimumWidth(1, 250);    layout->addWidget(nameButton, 0, 0);    layout->addWidget(nameLabel, 0, 1);    layout->addWidget(sexButton, 1, 0);    layout->addWidget(sexLabel, 1, 1);    layout->addWidget(ageButton, 3, 0);    layout->addWidget(ageLabel, 3, 1);    layout->addWidget(statureButton, 4, 0);    layout->addWidget(statureLabel, 4, 1);    layout->addWidget(colorButton, 5, 0);    layout->addWidget(colorLabel, 5, 1);    layout->addWidget(fontButton, 6, 0);    layout->addWidget(fontLabel, 6, 1);    layout->addWidget(criticalButton, 7, 0);    layout->addWidget(criticalLabel, 7, 1);    layout->addWidget(informationButton, 8, 0);    layout->addWidget(informationLabel, 8, 1);    layout->addWidget(questionButton, 9, 0);    layout->addWidget(questionLabel, 9, 1);    layout->addWidget(warningButton, 10, 0);    layout->addWidget(warningLabel, 10, 1);    layout->addWidget(errorButton, 11, 0);    layout->addWidget(errorLabel, 11, 1);    setLayout(layout);    }void Dialog::getAge(){    bool ok;    int age = QInputDialog::getInteger(this,tr("User Age"),                        tr("Please input age"),ageLabel->text().toInt(),0,150,1,&ok);    if(ok)    {        ageLabel->setText(QString(tr("%1")).arg(age));    }}void Dialog::getStature(){    bool ok;    double d = QInputDialog::getDouble(this,tr("Stature"),                        tr("Please input stature"),6782.5,0,65536.00,1,&ok);    if(ok)    {        statureLabel->setText(QString(tr("%1")).arg(d));    }}void Dialog::getSex(){    QStringList items;    items << tr("male") << tr("female");    bool ok;    QString sex = QInputDialog::getItem(this,tr("Sex"),                        tr("Please select sex"),items,0,false,&ok);    if (ok)    {        sexLabel->setText(sex);    }}void Dialog::getName(){    bool ok;    QString name = QInputDialog::getText(this,tr("User Name"),                        tr("Please input new name"),QLineEdit::Normal,nameLabel->text(),&ok);    if(ok && !name.isEmpty())    {        nameLabel->setText(name);    }}void Dialog::getColor(){    QColor color = QColorDialog::getColor(Qt::green, this);    if (color.isValid())    {        colorLabel->setText(color.name());        colorLabel->setPalette(QPalette(color));        colorLabel->setAutoFillBackground(true);    }}void Dialog::getFont(){    bool ok;    QFont font = QFontDialog::getFont(&ok, QFont(fontLabel->text()), this);    if (ok)    {        fontLabel->setText(font.key());        fontLabel->setFont(font);    }}void Dialog::getCriticalMessage(){    QMessageBox::StandardButton reply;    reply = QMessageBox::critical(this, tr("QMessageBox::critical()"),                                    MESSAGE,                                    QMessageBox::Abort | QMessageBox::Retry | QMessageBox::Ignore);    if (reply == QMessageBox::Abort)    {        criticalLabel->setText(tr("Abort"));    }    else if (reply == QMessageBox::Retry)    {        criticalLabel->setText(tr("Retry"));    }    else    {        criticalLabel->setText(tr("Ignore"));    }}void Dialog::getInformationMessage(){    QMessageBox::StandardButton reply;    reply = QMessageBox::information(this, tr("QMessageBox::information()"), MESSAGE);    if (reply == QMessageBox::Ok)    {        informationLabel->setText(tr("OKOK"));    }    else    {        informationLabel->setText(tr("Escape"));    }}void Dialog::getQuestionMessage(){    QMessageBox::StandardButton reply;    reply = QMessageBox::question(this, tr("QMessageBox::question()"),                                    MESSAGE,                                    QMessageBox::Yes | QMessageBox::No | QMessageBox::Cancel);    if (reply == QMessageBox::Yes)    {        questionLabel->setText(tr("Yes"));    }    else if (reply == QMessageBox::No)    {        questionLabel->setText(tr("No"));    }    else    {        questionLabel->setText(tr("Cancel"));    }}void Dialog::getWarningMessage(){    QMessageBox msgBox(QMessageBox::Warning, tr("QMessageBox::warning()"),                       MESSAGE, 0, this);    msgBox.addButton(tr("Save &Again"), QMessageBox::AcceptRole);    msgBox.addButton(tr("&Continue"), QMessageBox::RejectRole);    if (msgBox.exec() == QMessageBox::AcceptRole)    {        warningLabel->setText(tr("Save Again"));    }    else    {        warningLabel->setText(tr("Continue"));    }}void Dialog::getErrorMessage(){    errorMessageDialog->showMessage(            tr("This dialog shows and remembers error messages. "               "If the checkbox is checked (as it is by default), "               "the shown message will be shown again, "               "but if the user unchecks the box the message "               "will not appear again if QErrorMessage::showMessage() "               "is called with the same message."));    errorLabel->setText(tr("If the box is unchecked, the message "                           "won't appear again."));}