QMessageBox 在MAC下更加自然

说明

在MAC写过QT程序的程序员应该都知道，QT默认的QMessageBox没有MAC系统的效果，在网上找到了一篇关于这方面的文章，但是这篇文章写的有个缺点，就是使用信号的方式，使用起来很不方便。

让你的 Qt 桌面程序看上去更加 native（五）：QDialog

解决

我自己写了一个类文件，以达到更好的使用QMessageBox。将下面的代码复制到你的工程中，就可以方便的使用。

#ifndef QMESSAGEBOXEX_H
#define QMESSAGEBOXEX_H

#include <QMessageBox>

class QMessageBoxEx : public QMessageBox
{
public:
    static QMessageBoxEx *shareQMessageBoxEx();

public:
    QMessageBoxEx();
    int information(QWidget *parent, const QString &title,
                    const QString &text, StandardButtons buttons = Ok,
                    StandardButton defaultButton = NoButton);

    int question(QWidget *parent, const QString &title,
                 const QString &text, StandardButtons buttons = StandardButtons(Yes | No),
                 StandardButton defaultButton = NoButton);

    int warning(QWidget *parent, const QString &title,
                const QString &text, StandardButtons buttons = Ok,
                StandardButton defaultButton = NoButton);

    int critical(QWidget *parent, const QString &title,
                 const QString &text, StandardButtons buttons = Ok,
                 StandardButton defaultButton = NoButton);
};

#endif // QMESSAGEBOXEX_H

#include "qmessageboxex.h"

static QMessageBoxEx *m_pThis = NULL;
QMessageBoxEx *QMessageBoxEx::shareQMessageBoxEx()
{
    if (m_pThis == NULL)
        m_pThis = new QMessageBoxEx();
    return m_pThis;
}

QMessageBoxEx::QMessageBoxEx()
{
}

int QMessageBoxEx::information(QWidget *parent, const QString &title, const QString &text, QMessageBox::StandardButtons buttons, QMessageBox::StandardButton defaultButton)
{
    this->setIcon(QMessageBox::Information);
    this->setParent(parent);
    this->setWindowTitle(title);
    this->setText(text);
    this->setStandardButtons(buttons);
    this->setDefaultButton(defaultButton);
    this->setWindowModality(Qt::WindowModal);
    return this->exec();
}

int QMessageBoxEx::question(QWidget *parent, const QString &title, const QString &text, QMessageBox::StandardButtons buttons, QMessageBox::StandardButton defaultButton)
{
    this->setIcon(QMessageBox::Question);
    this->setParent(parent);
    this->setWindowTitle(title);
    this->setText(text);
    this->setStandardButtons(buttons);
    this->setDefaultButton(defaultButton);
    this->setWindowModality(Qt::WindowModal);
    return this->exec();
}

int QMessageBoxEx::warning(QWidget *parent, const QString &title, const QString &text, QMessageBox::StandardButtons buttons, QMessageBox::StandardButton defaultButton)
{
    this->setIcon(QMessageBox::Warning);
    this->setParent(parent);
    this->setWindowTitle(title);
    this->setText(text);
    this->setStandardButtons(buttons);
    this->setDefaultButton(defaultButton);
    this->setWindowModality(Qt::WindowModal);
    return this->exec();
}

int QMessageBoxEx::critical(QWidget *parent, const QString &title, const QString &text, QMessageBox::StandardButtons buttons, QMessageBox::StandardButton defaultButton)
{
    this->setIcon(QMessageBox::Critical);
    this->setParent(parent);
    this->setWindowTitle(title);
    this->setText(text);
    this->setStandardButtons(buttons);
    this->setDefaultButton(defaultButton);
    this->setWindowModality(Qt::WindowModal);
    return this->exec();
}

使用

        if (QMessageBox::Yes == QMessageBoxEx::shareQMessageBoxEx()->question(Dialog::shareDialog(),tr("Question"),tr("project folder is exists, will rename "proj.qt.bak" !"),
                                                                              QMessageBox::Yes|QMessageBox::No,QMessageBox::No))
        {
            if (false == QDir(projectFileInfo.absoluteFilePath()).rename(qtProFileInfo.absoluteFilePath(),"proj.qt.bak"))
            {
                QMessageBoxEx::shareQMessageBoxEx()->critical(Dialog::shareDialog(),tr("Error"),tr("rename proj.qt failure"));
                return;
            }
        }

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