List Sub_directories from selected directory

Kinesis

I want to list subdirectories from inside a directory(only name,but also work as path) . This is the current code I use to list subdirs .

for(const QFileInfo & finfo: directory.entryInfoList()){
       ui->listWidget_dirs->addItem(finfo.absoluteFilePath());

    }

In that case I get the subdir paths.For example not like "home/user/Dir/subdir" , like"subdir". But I want to use this "subdir" to work like path. Because I need to use this subdir path to do something more. How can I do that?

jsulm

@Kinesis What stops you from doing

ui->listWidget_dirs->addItem(directory.dirName() + '/' + finfo.absoluteFilePath());

?

Kinesis

@jsulm
Isn't it possible to show only subdir name ? But also work like a path . Ok , I need to use this selected directory and display images . So to display images , this selected subdir name must be a path . I don't want to list very long path . Thats why.
If you don't get what I mean or want to take alook , I can show you my full code .

jsulm

@Kinesis If you don't want to show the whole path, then just schow the subdirectory, but keep the path to its parent directory to use later.

/a/b/c
/a/b/d
/a/b/e

Keep /a/b as parent and show only c, d and e.

Kinesis

@jsulm
Ah , I get what you mean . But how can I just show the subdirectory ?

jsulm

@Kinesis http://doc.qt.io/qt-5/qdir.html#dirName

Kinesis

@jsulm
I don't know how to use"QDir::dirName() ". Please tell me the way.

jsulm

@Kinesis Well:

QString dirPath = finfo.absoluteDir().dirName();

You should read documentation and try.

aha_1980

@Kinesis:

for (const QFileInfo &finfo: directory.entryInfoList()) {
  QDir dir(finfo.absoluteFilePath());
  ui->listWidget_dirs->addItem(dir.dirName());
}

disclaimer: only brain compiled

Edit: @jsulm has the better solution :)

Kinesis

Well , I did as you said . Now I can list only subdirs . But I can't use this name as file path . Because I added a click function to list images . If I click one of the subdir name, images will be displayed inside this subdir. But in that case I can't use the name . What should I do?Full code is here.

QDir directory = QFileDialog::getExistingDirectory(this, tr("Open Directory"),"/home", QFileDialog::ShowDirsOnly| QFileDialog::DontResolveSymlinks);
     
    auto listWidget_images = new QListWidget();//set listwidget to display images
    listWidget_images->setMinimumSize(1200,400);
    listWidget_images->setViewMode(QListWidget::IconMode);
    listWidget_images->setIconSize(QSize(320,240));
    listWidget_images->setResizeMode(QListWidget::Adjust);

   
  
for (const QFileInfo &finfo: directory.entryInfoList()) {
     QDir dir(finfo.absoluteFilePath());
     ui->listWidget_dirs->addItem(dir.dirName());

   


    connect(ui->listWidget_dirs, & QListWidget::itemClicked,[listWidget_images,this](QListWidgetItem *item)
    {
        listWidget_images->show();
        listWidget_images->clear();
        QDir directory(item->text());
        directory.setNameFilters({"*.png", "*.jpg"});
        for(const QFileInfo & finfo: directory.entryInfoList()){
            QListWidgetItem *item = new QListWidgetItem(QIcon(finfo.absoluteFilePath()), finfo.fileName());
            listWidget_images->addItem(item);

        }
    });

I can click the suddir names but the images won't be displayed. :(

jsulm

@Kinesis said in List Sub_directories from selected directory:

QDir directory(item->text());

As I said above you need the parent directory, now you only have the last directory which is then relative path.

 QDir directory(parentDir + '/' + item->text());

Kinesis

@jsulm
I can't capture the parent directory which is selected from outside lambda . How can I capture it?

jsulm

@Kinesis Sure you can:

QDir directory = QFileDialog::getExistingDirectory(this, tr("Open Directory"),"/home", QFileDialog::ShowDirsOnly| QFileDialog::DontResolveSymlinks);
...
connect(ui->listWidget_dirs, & QListWidget::itemClicked,[directory, listWidget_images,this](QListWidgetItem *item)
...

Kinesis

@jsulm
Well , thanks . I added directory in capture list. But When I try to combine parent dir and child dir , "QDir path(directory + '/' + item->text());" , I got an error "invalid operands to binary expression ('QDir' and 'int')" . How can I fix that?

jsulm

@Kinesis said in List Sub_directories from selected directory:

How can I fix that?

You can read documentation...

QString dir = directory.absolutePath() + '/' + item->text();

Kinesis

@jsulm
got it got it . Thanks .