在非gui線程使用QMessageBox

最近我寫項目的時候遇到一個奇怪的需求，要在工做線程內，根據某個狀況彈出一個MessageBox

可是Qt提供的MessageBox只能夠在gui線程（主線程）使用，因而我就對QMessageBox封裝了一下，讓其能夠在非gui線程內被調用

 

特新介紹

1.能夠在任何線程調用

2.show後和默認的MessageBox同樣是阻塞的，MessageBox關閉後纔會返回

 

注意：

1.我只封裝了information，若是須要其餘的，請作擴展

 

上源碼

申明：

 

#include <QMessageBox>
#include <QEventLoop>

class JasonQt_ShowInformationMessageBoxFromOtherThread: public QObject
{
    Q_OBJECT

private:
    const QString m_title;
    const QString m_message;

public:
    JasonQt_ShowInformationMessageBoxFromOtherThread(const QString &title, const QString &message);

    static void show(const QString &title, const QString &message);

private:
    void readyShow(void);

private slots:
    void onShow(void);
};

 

 

定義：

 

JasonQt_ShowInformationMessageBoxFromOtherThread::JasonQt_ShowInformationMessageBoxFromOtherThread(const QString &title, const QString &message):
    m_title(title),
    m_message(message)
{ }

void JasonQt_ShowInformationMessageBoxFromOtherThread::show(const QString &title, const QString &message)
{
    QEventLoop eventLoop;
    auto messageBox = new JasonQt_ShowInformationMessageBoxFromOtherThread(title, message);
    connect(messageBox, SIGNAL(destroyed()), &eventLoop, SLOT(quit()));
    messageBox->readyShow();
    eventLoop.exec();
}

void JasonQt_ShowInformationMessageBoxFromOtherThread::readyShow(void)
{
    this->moveToThread(qApp->thread());
    QTimer::singleShot(0, this, SLOT(onShow()));
}

void JasonQt_ShowInformationMessageBoxFromOtherThread::onShow(void)
{
    QMessageBox::information(NULL, m_title, m_message);
    this->deleteLater();
}

 

 

使用：

 

JasonQt_ShowInformationMessageBoxFromOtherThread::show("Title", "Message");

 

http://blog.csdn.net/wsj18808050/article/details/43020563

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