C++ QDialog::open方法代码示例

void NSISUpdater::showDialog(const UpdateInfo &info)
{
    // if the version tag is set, there is a newer version.
    QDialog *msgBox = new QDialog;
    msgBox->setAttribute(Qt::WA_DeleteOnClose);

    QIcon infoIcon = msgBox->style()->standardIcon(QStyle::SP_MessageBoxInformation, 0, 0);
    int iconSize = msgBox->style()->pixelMetric(QStyle::PM_MessageBoxIconSize, 0, 0);

    msgBox->setWindowIcon(infoIcon);

    QVBoxLayout *layout = new QVBoxLayout(msgBox);
    QHBoxLayout *hlayout = new QHBoxLayout;
    layout->addLayout(hlayout);

    msgBox->setWindowTitle(tr("New Version Available"));

    QLabel *ico = new QLabel;
    ico->setFixedSize(iconSize, iconSize);
    ico->setPixmap(infoIcon.pixmap(iconSize));
    QLabel *lbl = new QLabel;
    QString txt = tr("<p>A new version of the %1 Client is available.</p>"
                     "<p><b>%2</b> is available for download. The installed version is %3.</p>")
                      .arg(Utility::escape(Theme::instance()->appNameGUI()),
                          Utility::escape(info.versionString()), Utility::escape(clientVersion()));

    lbl->setText(txt);
    lbl->setTextFormat(Qt::RichText);
    lbl->setWordWrap(true);

    hlayout->addWidget(ico);
    hlayout->addWidget(lbl);

    QDialogButtonBox *bb = new QDialogButtonBox;
    bb->setWindowFlags(bb->windowFlags() & ~Qt::WindowContextHelpButtonHint);
    QPushButton *skip = bb->addButton(tr("Skip this version"), QDialogButtonBox::ResetRole);
    QPushButton *reject = bb->addButton(tr("Skip this time"), QDialogButtonBox::AcceptRole);
    QPushButton *getupdate = bb->addButton(tr("Get update"), QDialogButtonBox::AcceptRole);

    connect(skip, &QAbstractButton::clicked, msgBox, &QDialog::reject);
    connect(reject, &QAbstractButton::clicked, msgBox, &QDialog::reject);
    connect(getupdate, &QAbstractButton::clicked, msgBox, &QDialog::accept);

    connect(skip, &QAbstractButton::clicked, this, &NSISUpdater::slotSetSeenVersion);
    connect(getupdate, SIGNAL(clicked()), SLOT(slotOpenUpdateUrl()));

    layout->addWidget(bb);

    msgBox->open();
}

void UpdateDetector::showDialog()
{
    // if the version tag is set, there is a newer version.
    QString ver = QString::fromLatin1("%1.%2.%3")
            .arg(MIRALL_VERSION_MAJOR).arg(MIRALL_VERSION_MINOR).arg(MIRALL_VERSION_MICRO);
    QDialog *msgBox = new QDialog;

    QIcon info = msgBox->style()->standardIcon(QStyle::SP_MessageBoxInformation, 0, 0);
    int iconSize = msgBox->style()->pixelMetric(QStyle::PM_MessageBoxIconSize, 0, 0);

    msgBox->setWindowIcon(info);

    QVBoxLayout *layout = new QVBoxLayout(msgBox);
    QHBoxLayout *hlayout = new QHBoxLayout;
    layout->addLayout(hlayout);

    msgBox->setWindowTitle(tr("New Version Available"));

    QLabel *ico = new QLabel;
    ico->setFixedSize(iconSize, iconSize);
    ico->setPixmap(info.pixmap(iconSize));
    QLabel *lbl = new QLabel;
    QString txt = tr("<p>A new version of the %1 Client is available.</p>"
                     "<p><b>%2</b> is available for download. The installed version is %3.<p>")
            .arg(Theme::instance()->appNameGUI()).arg(ocClient.versionstring()).arg(ver);

    lbl->setText(txt);
    lbl->setTextFormat(Qt::RichText);
    lbl->setWordWrap(true);

    hlayout->addWidget(ico);
    hlayout->addWidget(lbl);

    QDialogButtonBox *bb = new QDialogButtonBox;
    QPushButton *skip = bb->addButton(tr("Skip update"), QDialogButtonBox::ResetRole);
    QPushButton *reject = bb->addButton(tr("Skip this time"), QDialogButtonBox::AcceptRole);
    QPushButton  *getupdate = bb->addButton(tr("Get update"), QDialogButtonBox::AcceptRole);

    connect(skip, SIGNAL(clicked()), msgBox, SLOT(reject()));
    connect(reject, SIGNAL(clicked()), msgBox, SLOT(reject()));
    connect(getupdate, SIGNAL(clicked()), msgBox, SLOT(accept()));

    connect(skip, SIGNAL(clicked()), SLOT(slotSetVersionSeen()));
    connect(getupdate, SIGNAL(clicked()), SLOT(slotOpenUpdateUrl()));

    layout->addWidget(bb);

    msgBox->open();
    msgBox->resize(400, msgBox->sizeHint().height());
}

void CMainWindow::showAgreement(QString Agreement)
{
    QDialog *AgreementDialog = new QDialog(this);

    replaceRTF(Agreement);

    Ui::AgreementDialog *UI = new Ui::AgreementDialog;
    UI->setupUi(AgreementDialog);
    UI->TextBrowser->setHtml(Agreement);

    connect(AgreementDialog, SIGNAL(accepted()), CNetworkClient::instance(), SLOT(acceptAgreement()));
    connect(AgreementDialog, SIGNAL(rejected()), CNetworkClient::instance(), SLOT(disconnect()));

    AgreementDialog->open();
}

void MainWindow::open() {
    if (QMessageBox::Yes == QMessageBox::question(this,tr("Question"),tr("Are you OK?"), \
                                         QMessageBox::Yes | QMessageBox::No, QMessageBox::Yes)) {
        QMessageBox::information(this, tr("Hmmm..."), tr("I'm glad to hear that!"));
    } else {
        QMessageBox::information(this, tr("Hmmm..."), tr("I'm sorry!"));
    }
    //dialog建立在栈上
    /*//QDialog dialog(this);
    //QDialog dialog;
    dialog.setWindowTitle(tr("Hello, dialog!"));
    dialog.exec();
    //QMessageBox::information(this, tr( "Information" ), tr("Open"));
    */
    //dialog建立在堆上
    QDialog *dialog = new QDialog;
    //dialog 使用 new 在堆上分配空间, 却一直没有 delete。可以调用可以调用 deleteLater() 函数,或者是设置 dialog 的 WindowAttribute来delete dialog。
    dialog->setAttribute(Qt::WA_DeleteOnClose); // 或者 dialog->deleteLater();
    dialog->setWindowTitle(tr("hello, dialog!"));
    //dialog->show();
    dialog->open();

}