src_corelib_io_qdir.cpp

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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
 
#include <QDir>
#include <QPixmap>
 
void wrapInFunction()
{
 
    {
        //! [0]
        QDir("/home/user/Documents");
        QDir("C:/Users");
        //! [0]
    }
 
    {
        //! [1]
        QDir("images/landscape.png");
        //! [1]
    }
 
    {
        //! [2]
        QDir("Documents/Letters/Applications").dirName(); // "Applications"
        QDir().dirName();                                 // "."
        //! [2]
    }
 
    {
        //! [3]
        QDir directory("Documents/Letters");
        QString path = directory.filePath("contents.txt");
        QString absolutePath = directory.absoluteFilePath("contents.txt");
        //! [3]
    }
 
    {
        //! [4]
        QDir dir("example");
        if (!dir.exists())
            qWarning("Cannot find the example directory");
        //! [4]
    }
 
    {
        //! [5]
        QDir dir = QDir::root();                 // "/"
        if (!dir.cd("tmp")) {                    // "/tmp"
            qWarning("Cannot find the \"/tmp\" directory");
        } else {
            QFile file(dir.filePath("ex1.txt")); // "/tmp/ex1.txt"
            if (!file.open(QIODevice::ReadWrite))
                qWarning("Cannot create the file %s", qPrintable(file.fileName()));
        }
        //! [5]
    }
 
    {
        //! [6]
        QString bin = "/local/bin";         // where /local/bin is a symlink to /usr/bin
        QDir binDir(bin);
        QString canonicalBin = binDir.canonicalPath();
        // canonicalBin now equals "/usr/bin"
 
        QString ls = "/local/bin/ls";       // where ls is the executable "ls"
        QDir lsDir(ls);
        QString canonicalLs = lsDir.canonicalPath();
        // canonicalLS now equals "/usr/bin/ls".
        //! [6]
    }
 
    {
        //! [7]
        QDir dir("/home/bob");
        QString s;
 
        s = dir.relativeFilePath("images/file.jpg");     // s is "images/file.jpg"
        s = dir.relativeFilePath("/home/mary/file.txt"); // s is "../mary/file.txt"
        //! [7]
    }
 
    {
        //! [8]
        QDir::setSearchPaths("icons", QStringList(QDir::homePath() + "/images"));
        QDir::setSearchPaths("docs", QStringList(":/embeddedDocuments"));
        //...
        QPixmap pixmap("icons:undo.png"); // will look for undo.png in QDir::homePath() + "/images"
        QFile file("docs:design.odf"); // will look in the :/embeddedDocuments resource path
        //! [8]
    }
 
    {
        //! [9]
        QDir dir("/tmp/root_link");
        dir = dir.canonicalPath();
        if (dir.isRoot())
            qWarning("It is a root link");
        //! [9]
    }
 
    {
        //! [10]
        // The current directory is "/usr/local"
        QDir d1("/usr/local/bin");
        QDir d2("bin");
        if (d1 == d2)
            qDebug("They're the same");
        //! [10]
    }
 
    {
        //! [11]
        // The current directory is "/usr/local"
        QDir d1("/usr/local/bin");
        d1.setFilter(QDir::Executable);
        QDir d2("bin");
        if (d1 != d2)
            qDebug("They differ");
        //! [11]
    }
 
#if TEXT_FILE
    //! [12]
    C:/Users/Username
    //! [12]
#endif
}
 
#if 0
//! [13]
Q_INIT_RESOURCE(myapp);
//! [13]
#endif
 
//! [14]
inline void initMyResource() { Q_INIT_RESOURCE(myapp); }
 
namespace MyNamespace
{
    //...
 
    void myFunction()
    {
        initMyResource();
    }
}
//! [14]
 
# if 0
//! [15]
Q_CLEANUP_RESOURCE(myapp);
//! [15]
#endif
 
void snippet_16()
{
    //! [16]
    QString absolute = "/local/bin";
    QString relative = "local/bin";
    QFileInfo absFile(absolute);
    QFileInfo relFile(relative);
 
    QDir::setCurrent(QDir::rootPath());
    // absFile and relFile now point to the same file
 
    QDir::setCurrent("/tmp");
    // absFile now points to "/local/bin",
    // while relFile points to "/tmp/local/bin"
    //! [16]
}