Rename a lot of files by QFile and QFileSystemModel

**stereoMatching** · 25th July 2012, 15:42

Qt Code:

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#include <QApplication>
 
#include <QDir>
#include <QFileSystemModel>
#include <QString>
#include <QTableView>
#include <QTreeView>
 
int main( int argc, char **argv )
{
    QApplication app( argc, argv ); 
 
    QFileSystemModel model;
    QString const rootPath = "E:/file_test/very big";
 
    QTableView view;
    view.setModel(&model);
    view.setRootIndex(model.setRootPath(rootPath));
 
    view.show();
    //....select the data you want to rename from the view
    //let us assume I select 8000 of jpg files
 
    //don't know how to rename the file by QFileSystemModel, so I use QFile instead
    QDir::setCurrent(rootPath);
    model.blockSignals(true);
    view.blockSignals(true);
    for(int i = 0; i != 8000; ++i)
    {
      QFile file(rootPath + "/kkk" + QString::number(i) + ".jpg");
      file.rename("jjj" + QString::number(i) + ".jpg");
    }
   model.blockSignals(false);
    view.blockSignals(false);
 
    //the program will stall
    qDebug() << "finish";
 
    return app.exec();
}

#include <QApplication>

#include <QDir>
#include <QFileSystemModel>
#include <QString>
#include <QTableView>
#include <QTreeView>

int main( int argc, char **argv )
{
    QApplication app( argc, argv ); 

    QFileSystemModel model;
    QString const rootPath = "E:/file_test/very big";

    QTableView view;
    view.setModel(&model);
    view.setRootIndex(model.setRootPath(rootPath));

    view.show();
    //....select the data you want to rename from the view
    //let us assume I select 8000 of jpg files

    //don't know how to rename the file by QFileSystemModel, so I use QFile instead
    QDir::setCurrent(rootPath);
    model.blockSignals(true);
    view.blockSignals(true);
    for(int i = 0; i != 8000; ++i)
    {
      QFile file(rootPath + "/kkk" + QString::number(i) + ".jpg");
      file.rename("jjj" + QString::number(i) + ".jpg");
    }
   model.blockSignals(false);
    view.blockSignals(false);

    //the program will stall
    qDebug() << "finish";

    return app.exec();
}

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The UI would stall (become "blank" one before the the all of the files have changed their name)
I do try multi-thread (boost::thread) and QTimer::singleShot, but it is still stallif
besides, if I using multi-thread if will emit warning like "it is unsafe to use QPixmap in other
thread", so I better don't use it.

I added a progress bar to show the progress, but the progress bar also stall
How could I make the UI become alive when the files being rename?Thanks