You can try this one:

    QString QFileDialog::getExistingDirectory ( QWidget * parent = 0, const QString &amp; caption = QString(), const QString &amp; dir = QString(), Options options = ShowDirsOnly ) [static]

This one is used to choose a directory, and will popup a dialog like you show at last.

Demo:

     QString dir = QFileDialog::getExistingDirectory(this, tr(&quot;Open Directory&quot;),
                                                 &quot;/home&quot;,
                                                 QFileDialog::ShowDirsOnly
                                                 | QFileDialog::DontResolveSymlinks);

You can set the file mode in `QFileDialog` to `QFileDialog::Directory`

see http://qt-project.org/doc/qt-5.0/qtwidgets/qfiledialog.html#FileMode-enum

Or You can use `QFileDialog::setOption` with value `QFileDialog::ShowDirsOnly`

I&#39;m using 

     data=urllib2.urlopen(url).read()

I want to know:

 1. How can I tell if the data at a URL is gzipped?

 1. Does urllib2 automatically uncompress the data if it is gzipped? Will the data always be a string?

Does python urllib2 automatically uncompress gzip data fetched from webpage?

I need to scan a barcode using phonegap in Android and iPhone.
Is there a way to do this?

how to scan barcode using phonegap

The &quot;Browse For Folder&quot; Windows dialog is very inconvenient because:

 * it has no Path box where I can paste the path I want (eg from Total Commander)
 * it always starts from the Desktop with everything closed

Is there a way to use the &quot;Open File&quot; dialog (which is much better) to select a Folder? Some flag or option or something?

Context: the [calibre eLibrary manager](http://bugs.calibre-ebook.com/ticket/7160) which is written in Python and Qt.

It currently displays as on the left. I&#39;d like it to display as on the right
![BrowserFileDialog](http://i.stack.imgur.com/CzxbK.gif)

or even better, as the Open File dialog:
![OpenFileDialog](http://i.stack.imgur.com/oy8zG.png)

can the Open File dialog be used to select a Folder?

The "Browse For Folder" Windows dialog is very inconvenient because:
<ul>
<li>it has no Path box where I can paste the path I want (eg from Total Commander)</li>
<li>it always starts from the Desktop with everything closed</li>
</ul>
Is there a way to use the "Open File" dialog (which is much better) to select a Folder? Some flag or option or something?
Context: the <a href="http://bugs.calibre-ebook.com/ticket/7160" target="_blank" rel="noopener noreferrer">calibre eLibrary manager</a> which is written in Python and Qt.
It currently displays as on the left. I'd like it to display as on the right
<img src="http://i.stack.imgur.com/CzxbK.gif" alt="BrowserFileDialog">
or even better, as the Open File dialog:
<img src="http://i.stack.imgur.com/oy8zG.png" alt="OpenFileDialog">

How can I copy a file from my project to the output directory with qmake?

I&#39;m compiling on Linux but in the future I&#39;ll compile it on Mac and Windows.

QMake - how to copy a file to the output

The Qt documentation for QThread says to create a class from QThread, and to implement the run method. 

Below is taken from the 4.7 Qthread documentation...

&gt; To create your own threads, subclass QThread and reimplement run(). For example: 
    
     class MyThread : public QThread
     {
     public:
         void run();
     };
    
     void MyThread::run()
     {
         QTcpSocket socket;
         // connect QTcpSocket&#39;s signals somewhere meaningful
         ...
         socket.connectToHost(hostName, portNumber);
         exec();
     }

So in every single thread I&#39;ve created, I&#39;ve done just that and for most things it works just fine (I do not implement moveToThread(this) in any of my objects and it works great).

I hit a snag last week (managed to get through it by working around where I created my objects) and found the [following blog post][1]. Here is basically says that subclassing QThread really isn&#39;t the correct way to do it (and that the documentation is incorrect).

This is coming from a Qt developer so at first glance I was interested and upon further reflection, agree with him. Following OO principles, you really only want to subclass a class to further enhance that class... not to just use the classes methods directly... thats why you instantiate... 

Lets say I wanted to move a custom QObject class to a thread... what would be the &#39;correct&#39; way of doing it? In that blog post, he &#39;says&#39; he has an example somewhere... but if someone could further explain it to me it&#39;d be greatly appreciated!

**Update:**

Since this question gets so much attention, here is a copy and paste of the 4.8 documentation with the &#39;proper&#39; way to implement a QThread.

 

    class Worker : public QObject
     {
         Q_OBJECT
         QThread workerThread;
    
     public slots:
         void doWork(const QString &amp;parameter) {
             // ...
             emit resultReady(result);
         }
    
     signals:
         void resultReady(const QString &amp;result);
     };
    
     class Controller : public QObject
     {
         Q_OBJECT
         QThread workerThread;
     public:
         Controller() {
             Worker *worker = new Worker;
             worker-&gt;moveToThread(&amp;workerThread);
             connect(workerThread, SIGNAL(finished()), worker, SLOT(deleteLater()));
             connect(this, SIGNAL(operate(QString)), worker, SLOT(doWork(QString)));
             connect(worker, SIGNAL(resultReady(QString)), this, SLOT(handleResults(QString)));
             workerThread.start();
         }
         ~Controller() {
             workerThread.quit();
             workerThread.wait();
         }
     public slots:
         void handleResults(const QString &amp;);
     signals:
         void operate(const QString &amp;);
     };

I still believe that it is worthwhile to point out that they include an extra `Worker::workerThread` member that is unnecessary and is never used in their example. Remove that piece and it is a proper example of how to do threading in Qt.

  [1]: http://blog.qt.io/blog/2010/06/17/youre-doing-it-wrong/

what is the correct way to implement a QThread... (example please...)

I was trying to create a simple console application to try out Qt&#39;s XML parser. I started a project in VS2008 and got this template:

    int main(int argc, char *argv[])
    {
        QCoreApplication a(argc, argv);

        return a.exec();
    }

Since I don&#39;t need event processing, I was wondering whether I may get into trouble if I neglect to create a QCoreApplication and running the event loop. The docs state that it&#39;s recommended in most cases.

For the sake of curiosity however, I am wondering how could I make some generic task execute on the event loop and then terminate the application. I was unable to google a relevant example.

How do I create a simple Qt console application in C++?

I am trying to do something like this:

    QString string;
    // do things...
    std::cout &lt;&lt; string &lt;&lt; std::endl;

but the code doesn&#39;t compile.
How to output the content of qstring into the console (e.g. for debugging purposes or other reasons)? How to convert `QString` to `std::string`?



How to convert QString to std::string?

This doesn&#39;t seem easy.  Basically, I add `QPushButton`s through a function to a layout, and when the function executes, I want to clear the layout first (removing all `QPushButton`s and whatever else is in there), because more buttons just get appended to the `scrollview`.

header

    QVBoxLayout* _layout;

cpp

    void MainWindow::removeButtonsThenAddMore(const QString &amp;item) {
    
    //remove buttons/widgets
    
    QVBoxLayout* _layout = new QVBoxLayout(this);

    QPushButton button = new QPushButton(item);
    _layout-&gt;addWidget(button);
    
    QPushButton button = new QPushButton(&quot;button&quot;);
    _layout-&gt;addWidget(button);
    
    QWidget* widget = new QWidget();
    widget-&gt;setLayout(_layout);
    
    QScrollArea* scroll = new QScrollArea();
    scroll-&gt;setWidget(widget);
    scroll-&gt;show();
    
    }



Qt - remove all widgets from layout?

How can I use multiple file extensions within one group using `OpenFileDialog`?
I have `Filter = &quot;BMP|*.bmp|GIF|*.gif|JPG|*.jpg|PNG|*.png|TIFF|*.tiff&quot;`
and I want to create groups so JPG are *.jpg and *.jpeg, TIFF are *.tif and *.tiff and also &#39;All graphic types&#39;? How can I do that?

Multiple file extensions in OpenFileDialog

I am trying to include only the filename of the file I&#39;ve selected in the OpenFileDialog in the label1.Text property, but I haven&#39;t found a solution yet.
I know I could use a method from the string class on the ofd instance to filter out the whole path to the file, but I would like to know if a smarter/quicker way exists?


    OpenFileDialog ofd = new OpenFileDialog();
    ofd.Title = &quot;Find song&quot;;
    ofd.Filter = &quot;MP3 files|*.mp3&quot;;
    ofd.InitialDirectory = @&quot;C:\&quot;;
    if (ofd.ShowDialog() == DialogResult.OK)
    {
       label1.Text = &quot;&quot; + ofd.FileName +&quot;&quot;;
    }

Obtaining only the filename when using OpenFileDialog property &quot;FileName&quot;

I have a simple script which parses a file and loads it&#39;s contents to a database. I don&#39;t need a UI, but right now I&#39;m prompting the user for the file to parse using `raw_input` which is most unfriendly, especially because the user can&#39;t copy/paste the path.  I would like a quick and easy way to present a file selection dialog to the user, they can select the file, and then it&#39;s loaded to the database.  (In my use case, if they happened to chose the wrong file, it would fail parsing, and wouldn&#39;t be a problem even if it was loaded to the database.)

    import tkFileDialog
    file_path_string = tkFileDialog.askopenfilename()

This code is close to what I want, but it leaves an annoying empty frame open (which isn&#39;t able to be closed, probably because I haven&#39;t registered a close event handler).

I don&#39;t have to use tkInter, but since it&#39;s in the Python standard library it&#39;s a good candidate for quickest and easiest solution.

Whats a quick and easy way to prompt for a file or filename in a script without any other UI?

Quick and easy file dialog in Python?

I have a `TextBox` named `textbox1` and a `Button` named `button1`.
When I click on `button1` I want to browse my files to search only for image files (type jpg, png, bmp...).
And when I select an image file and click Ok in the file dialog I want the file directory to be written in the `textbox1.text` like this:

    textbox1.Text = &quot;C:\myfolder\myimage.jpg&quot;

Open file dialog and select a file using WPF controls and C#

I was going to use the following project: https://github.com/scottwis/OpenFileOrFolderDialog

However, there&#39;s a problem: it uses the `GetOpenFileName` function and `OPENFILENAME` structure. `OPENFILENAME` has the member named `templateID`, which is the identifier for dialog template. And the project contains the `res1.rc` file and the templated dialog init, too. But I couldn&#39;t figure out how to attach this file to my C# project.

Is there a better way to use an `OpenFileDialog` to select folders?

Content Type	Original Author	Original Content on Stackoverflow
Question	Vladimir Alexiev	View Question on Stackoverflow
Solution 1 - Qt	liuyanghejerry	View Answer on Stackoverflow
Solution 2 - Qt	Ranjith	View Answer on Stackoverflow

can the Open File dialog be used to select a Folder?

Qt Problem Overview

Qt Solutions

Solution 1 - Qt

Solution 2 - Qt

how to scan barcode using phonegap

Does python urllib2 automatically uncompress gzip data fetched from webpage?

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