Hi,

I'm subclassing QDir for a "removeAll" method to fully remove a directory with all its sub-directories.

My problem is the error-handling. To avoid infinity loops, I break the iteration if QFile::remove() returns false.

When all files are closed, in some cases even if they are open, the removeAll method does great job.

BUT:
Let's take an example situation:
I have a bitmap test.bmp in a sub-directory.
Now there are 3 cases:
1. test.bmp is closed --> everything works fine and test.bmp is deleted
2. test.bmp is opend for viewing (doubleclick on file) --> everything works fine and test.bmp is deleted (although it is still opened on my screen, but when I close the window, it is deleted)
3. test.bmp is opend for editing (paint.exe) --> infinity loop, because it is not deleted and program always tries and fails to delete the parent directory!!

That is the code:
Qt Code: 
  1. myQDir::myQDir(const QString &stringPath) : QDir(stringPath)
  2. {
  3.   this->diriteratorAllEntries = new QDirIterator(stringPath, QDir::AllEntries | QDir::NoDotAndDotDot, QDirIterator::Subdirectories);
  4.   this->diriteratorAllSubDirs = new QDirIterator(stringPath, QDir::AllDirs | QDir::NoDotAndDotDot, QDirIterator::Subdirectories);
  5.   this->stringlistAllSubDirs = new QStringList;
  6.   this->stringlistErrors = new QStringList;
  7.   this->stringlistErrors->clear();
  8. }
  9.  
  10. bool myQDir::removeAll(bool boolIncludeParent)
  11. {
  12.   this->stringlistErrors->clear();
  13.   QString stringEntry;
  14.   while(this->diriteratorAllEntries->hasNext())
  15.   {
  16.     stringEntry = this->diriteratorAllEntries->next();
  17.     if(QDir(stringEntry).exists())
  18.     {
  19.       this->stringlistAllSubDirs->append(stringEntry);
  20.       continue;
  21.     }
  22.     if(!QFile::remove(stringEntry))  // there is the problem --> QFile::remove() always returns true, even when the bitmap is not deleted!!
  23.       this->stringlistErrors->append(stringEntry);
  24.   }
  25.   if(this->stringlistErrors->count() > 0)  // this should break when any files are not deleted and prevent from going into the next loop where the directories are deleted --> also fails!!
  26.     return false;
  27.  
  28.   while(this->stringlistAllSubDirs->count() > 0)
  29.   {
  30.     for(int i = 0; i < this->stringlistAllSubDirs->count(); i++)
  31.     {
  32.       if(QDir(this->stringlistAllSubDirs->at(i)).rmdir(this->stringlistAllSubDirs->at(i)))
  33.         this->stringlistAllSubDirs->removeAt(i);
  34.     }
  35.   }
  36.   if(boolIncludeParent)
  37.   {
  38.     if(!this->rmdir(this->absolutePath()))
  39.       return false;
  40.   }
  41.   return true;
  42. }
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Does anybody know why QFile::remove fails when the bitmap is opend for editing? Maybe it doesn't realize that a second program (e.g. paint.exe) has access to it... Don't know.

Thank you in anticipation!
Binary