Supporting data models for file lists

[elfring]

A lot of software applications will usually work with file lists.
The construction of customised data models can be performed by some design approaches then.

I have got the impression that additional programming interfaces will be more helpful for this use case than a class like “QFileSystemModel”. QFileInfo objects can be combined into other data structures.

Would you like to point any information sources out for reusable class libraries in this software area?

[VRonin]

It's not totally clear what you are trying to achieve. Do you want a QFileSystemModel that filters by extension type?

[elfring]

It's not totally clear what you are trying to achieve.

This can be usual.

Do you want a QFileSystemModel that filters by extension type?

Such data processing can be also useful occasionally.

But I am looking more for class libraries which will take care of the properties that are shared between files (and their names).

Examples:

• Case-insensitive iteration through file lists
• Performing an action on each element in a list
• Determination of directory hierarchies
• Development challenges around the handling of symbolic links

[mrjj]

@elfring
Hi
there is http://doc.qt.io/qt-5/qfileinfo.html
for file handling.

[elfring]

for file handling

I mentioned the QFileInfo class already in my clarification request.
I would appreciate if some comom file processing operations can be provided by a known class library (instead of repeating similar programming efforts).

[mrjj]

@elfring
well enumerating containers is covered by std so it would be few lines of code
to have a list of QFileInfo and loop over them.
Also Qt provides http://doc.qt.io/qt-5/qdiriterator.html
to handle the directories.

[VRonin]

@elfring said in Supporting data models for file lists:

Case-insensitive iteration through file lists

Iteration has nothing to do with case sensitivity. You can use QDirIterator

Searching can be case-insensitive using QDir::entryInfoList and passing the QDir::CaseSensitive filter flag

Performing an action on each element in a list

that's a for loop using QDirIterator there's nothing fancy

Determination of directory hierarchies

Again, QDirIterator can do it: iterator.fileInfo().isDir()

Development challenges around the handling of symbolic links

Just pass QDirIterator::FollowSymlinks or not. alternatively you can always use iterator.fileInfo().isSymLink()

[elfring]

Do you get any further software development ideas for the mapping of the following class member variable to a Qt model class when the keys will be file names?

    std::map<std::string, std::pair<std::vector<error_attributes>, bool>> records;

[SGaist]

Hi,

QAbstractListModel