I want to show a dialog to user to select a file/directory in qt.
I tried using QFileDialog methods to get it, but either i can set file mode or directory mode, could not able to set both. if I set QFileDialog::Directory as file mode it shows directories as well as files, but could not able to select any file.
Here is the example code I tried...
QFileDialog dialog;
dialog.setFileMode(QFileDialog::Directory);
dialog.setOption(QFileDialog::DontUseNativeDialog,true);
dialog.setOption(QFileDialog::DontResolveSymlinks);
dialog.setNameFilterDetailsVisible(true);
dialog.setViewMode(QFileDialog::Detail);
QStringList filters;
filters <<"Any files (*)"
<<"Text files (*.txt)"
<<"Image files (*.png *.xpm *.jpg)";
dialog.setOption(QFileDialog::HideNameFilterDetails,false);
dialog.setNameFilters(filters);
int res = dialog.exec();
QDir directory;
QString file = directory.currentPath();
if (res)
{
directory = dialog.selectedFiles()[0];
QStringList filesList = directory.entryList(QDir::Files);
QString fileName;
foreach(fileName, filesList)
{
qDebug() << "FileName " << fileName;
}
}
Is there is any way get the path of selected file or directory ?
Related
I have a problem that I don't know how to filter images from a selected directory. I usually use directory.setNameFilters({"*.png", "*.jpg"}); but in this case I can't use that because I need to use the selected directory inside a listWidget. I use signal and slot functions. I mean if I click a directory which is inside a listWidget, the images inside this directory will be displayed in another listWidget. If I click another directory it will do the same function. Please take a look my code.
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()){
ui->listWidget_dirs->addItem(finfo.absoluteFilePath());
}
connect(ui->listWidget_dirs, & QListWidget::itemClicked,[listWidget_images,this](QListWidgetItem *item)
{
listWidget_images->show();
directory.setNameFilters({"*.png", "*.jpg"});
for(const QFileInfo & finfo: directory.entryInfoList()){
QListWidgetItem *item = new QListWidgetItem(QIcon(finfo.absoluteFilePath()), finfo.fileName());
listWidget_images->addItem(item);
}
});
you have to create the QDir using the text of the QListWidgetItem.
On the other hand the method to use to obtain the list of subdirectories gets file and directories without distinguishing one from another, I have fixed that part.
QString directory = QFileDialog::getExistingDirectory(this,
tr("Open Directory"),
QDir::homePath(),
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);
QDirIterator diter(directory, QDir::Dirs | QDir::NoDotAndDotDot);
while (diter.hasNext()) {
ui->listWidget_dirs->addItem(diter.next());
}
connect(ui->listWidget_dirs, &QListWidget::itemClicked,[listWidget_images](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 am new in Qt and I need help in transferring all files from a specific path of the local machine to an external USB Drive.
Copying a single file
You can use QFile::copy.
QFile::copy(srcPath, dstPath);
Note: this function doesn't overwrite files, so you must delete previous files if they exist:
if (QFile::exist(dstPath)) QFile::remove(dstPath);
If you need to show an user interface to get the source and destination paths, you can use QFileDialog's methods to do that. Example:
bool copyFiles() {
const QString srcPath = QFileDialog::getOpenFileName(this, "Source file", "",
"All files (*.*)");
if (srcPath.isNull()) return false; // QFileDialog dialogs return null if user canceled
const QString dstPath = QFileDialog::getSaveFileName(this, "Destination file", "",
"All files (*.*)"); // it asks the user for overwriting existing files
if (dstPath.isNull()) return false;
if (QFile::exist(dstPath))
if (!QFile::remove(dstPath)) return false; // couldn't delete file
// probably write-protected or insufficient privileges
return QFile::copy(srcPath, dstPath);
}
Copying the whole content of a directory
I'm extending the answer to the case srcPath is a directory. It must be done manually and recursively. Here is the code to do it, without error checking for simplicity. You must be in charge of choosing the right method (take a look at QFileInfo::isFile for some ideas.
void recursiveCopy(const QString& srcPath, const QString& dstPath) {
QDir().mkpath(dstPath); // be sure path exists
const QDir srcDir(srcPath);
Q_FOREACH (const auto& dirName, srcDir.entryList(QStringList(), QDir::Dirs | QDir::NoDotAndDotDot, QDir::Name)) {
recursiveCopy(srcPath + "/" + dirName, dstPath + "/" + dirName);
}
Q_FOREACH (const auto& fileName, srcDir.entryList(QStringList(), QDir::Files, QDir::Name)) {
QFile::copy(srcPath + "/" + fileName, dstPath + "/" + fileName);
}
}
If you need to ask for the directory, you can use QFileDialog::getExistingDirectory.
Final remarks
Both methods assume srcPath exists. If you used the QFileDialog methods it is highly probable that it exists (highly probable because it is not an atomic operation and the directory or file may be deleted or renamed between the dialog and the copy operation, but this is a different issue).
I have solved the problem with the QStorageInfo::mountedVolumes() which return the list of the devices that are connected to the Machine. But all of them won't have a name except the Pendrive or HDD. So (!(storage.name()).isEmpty())) it will return the path to only those devices.
QString location;
QString path1= "/Report/1.txt";
QString locationoffolder="/Report";
foreach (const QStorageInfo &storage, QStorageInfo::mountedVolumes()) {
if (storage.isValid() && storage.isReady() && (!(storage.name()).isEmpty())) {
if (!storage.isReadOnly()) {
qDebug() << "path:" << storage.rootPath();
//WILL CREATE A FILE IN A BUILD FOLDER
location = storage.rootPath();
QString srcPath = "writable.txt";
//PATH OF THE FOLDER IN PENDRIVE
QString destPath = location+path1;
QString folderdir = location+locationoffolder;
//IF FOLDER IS NOT IN PENDRIVE THEN IT WILL CREATE A FOLDER NAME REPORT
QDir dir(folderdir);
if(!dir.exists()){
dir.mkpath(".");
}
qDebug() << "Usbpath:" <<destPath;
if (QFile::exists(destPath)) QFile::remove(destPath);
QFile::copy(srcPath,destPath);
qDebug("copied");
}
}
}
I had to create a folder as well as in USB because of my requirements and I have given a static name for the files. Then I just copied the data from file of the local machine to the file which I have created in USB with the help of QFile::copy(srcPath, dstPath). I hope it will help someone.
QString filename = QFileDialog::getOpenFileName(this,tr("Pdf files"), "C:/", "books(*.pdf)");
I want to get the selected file from QFileDialog and copy it to my desktop. Can I use something like this?
QFile::copy(filename,"desktop");
You need to get the path to the desktop using QStandardPaths, and then use that path in your call to QFile::copy.
Assuming you want to preserve the file name while copying, your code will look something like this:
QString filePath = QFileDialog::getOpenFileName(this ,
QObject::tr("Pdf files"),
"C:/", "books(*.pdf)");
QFileInfo fi(filePath);
QString fileName= fi.fileName();
QString desktopPath = QStandardPaths::writableLocation(QStandardPaths::DesktopLocation);
QString destinationPath= desktopPath+QDir::separator()+fileName;
if(QFile::copy(filePath, destinationPath))
qDebug() << "success";
else
qDebug() << "failed";
I am making a text editor in Qt C++ and when I open a txt file I want to change the Title to the name of the file that is open I am aware of the setWindowTitle("title go here"). I was only able to display the path. here is a section of the function that open a new document.
QString fileName = QFileDialog::getOpenFileName(
this,
"TextEditor - Open" ,
"C:\\",
" Text File(*.txt);;All files (*.*)");
QFile file1(fileName);
if((!fileName.isEmpty()))
{
currentFile = fileName;
file1.open(QIODevice::ReadOnly|QIODevice::Text);
QTextStream in(&file1);
QString str1 = in.readAll();
ui->plainTextEdit-> setPlainText(str1);
file1.close();
statusBar()-> showMessage(" File successfully loaded! ");
saveRecent(currentFile);
}
setWindowTitle(currentFile);
I formatted your Code and added the Code needed to show the correct Filename including the extension and excluding the Path.
QString fileName = QFileDialog::getOpenFileName(
this,
"TextEditor - Open" ,
"C:\\",
" Text File(*.txt);;All files (*.*)");
QFile file1(fileName);
if(!fileName.isEmpty())
{
currentFile = fileName;
file1.open(QIODevice::ReadOnly|QIODevice::Text);
QTextStream in(&file1);
QString str1 = in.readAll();
ui->plainTextEdit-> setPlainText(str1);
file1.close();
statusBar()-> showMessage(" File successfully loaded! ");
saveRecent(currentFile);
}
// Create the FileInfo
QFileInfo file1Info(file1);
// now get the fileName
QString file1Name(file1Info.fileName());
// Set the Title to the fileName
setWindowTitle(file1Name);
See also the documentation of QFileInfo.fileName().
QFileInfo fileInfo(file1);
QString filename(fileInfo.fileName());
I am using QT, I am not able to find out how to copy a file from one directory to another? How can I achieve this?
You can use QFile which provides a copy method.
QFile::copy("/path/file", "/path/copy-of-file");
If destination file exist, QFile::copy will not work. The solution is to verify if destination file exist, then delete it:
if (QFile::exists("/path/copy-of-file"))
{
QFile::remove("/path/copy-of-file");
}
QFile::copy("/path/file", "/path/copy-of-file");
The following code works in windows for specified reasons. This will set the path to specified drive and create the folder you created in Under UI Mode. Then copies the file from source to destination. Here the source is installation directory contained some files which are used for plotting curves. this file are not modified by users. They just use it.
hence this works as copy from installation directory to specified folder
void MainWindow::on_pushButton_2_clicked()
{
QString str5 = ui->lineEdit->text();
QString src = "."; QString setpath;
QDir dir(src);
if(!dir.exists()){
return;
}
dir.cdUp();
//dir.cdUp();
setpath = "E://";
dir.setPath(setpath);
QString dst_path = str5 + QDir::separator() ;
dir.mkpath(dst_path);
dir.cd(dst_path);
QString filename = "gnu.plt";
QString filename2 = "Load curve.plt";
QString filename3 = "tube temp.plt";
QFile file(filename);
QFile file1(filename2);
QFile file2(filename3);
file.copy(src+QDir::separator()+filename, setpath+QDir::separator()+str5+QDir::separator()+filename);
file1.copy(src+QDir::separator()+filename2, setpath+QDir::separator()+str5+QDir::separator()+filename2);
file2.copy(src+QDir::separator()+filename3, setpath+QDir::separator()+str5+QDir::separator()+filename3);
}