How to work with files

[artt]

I am newbie to Qt. So I would like to ask how create the app that would display (indx) the file system (or some directory). Then it should write this file to XML (with name, size etc). This app should also has capability to search for file. So I want to one how to create such application, what components of Qt I should use, where I can refere for similar examples, especially for this 3 issues and creating such interface. How much work it needs and how many files I should create?

[DoomerDan]

Sounds like homework. What have you done so far?

[d_stranz]

Sounds like homework.

No! Someone wouldn't actually post a homework problem here and expect us to feed them the solution, would they?

[wysota]

I don't think they would. Everybody knows rules of this forum forbid to post solutions to homework.

[artt]

Really I can do it at home, at library. But it is not the homework, but the presupposition for the potential employment. But I am familiar with C++ just theoretically, and now I need to write this app even in unnnown for me, Qt (now I just try to free the space for Qt installation). So I would like to have some help here -- at least theoretically. How much files (.cpp, .ui, .h) I should create here, what components for the UI I need use, and how they should be connected with the code itself. What IDE I need- f.e. Codeblocks or Qtcreator. And the main--how to index the file system in the whole or locally (in some directory), how transfer this file description to xml, and search it (by name probably)? So I do not ask to do it for me, but theoretically as far as possible to explain and refer to most appropriate similar code --as I have just few days for it and it is very important for me.

[stampede]

But I am familiar with C++ just theoretically

Sorry, but I think it will be almost impossible to use Qt if you don't have any practical experience with C++.

Anyway, as for the IDE, I'd choose QtCreator.
First I'd try to get familiar with Qt by studying some simple examples, you will have plenty of them in your Qt installation folder.
As for your main task, here are some useful classes: QDir, QFileInfo, QFileDialog, QFileSystemModel, QXmlStreamWriter.
Regarding the ui, I'd start with something very simple, like having just single button to browse for existing folder and tree view to display the folder contents, and then you can build more complicated functionality based on that.

[artt]

http://het.as.utexas.edu/HET/O_M/Ope...-filetree.html -- Can such files be some patterns for the app structure? Or this-- http://doc.qt.digia.com/qt-5.2/qtxml...e-example.html -- for the displaying file system? I think the indxing should be done in some simple way or it need some particular file? Then I need QXml probably with QFileInfo function. And as far as I know it superficially the search should be done by Xqueries as I did not found any information on search in qt files.Then I need the outlook of my UI -- probably the button for the indeexing, converting to xml, and the field for the search and field for the results for thee tasks (at least for the last one). Then the structure of app is also important except the code itself as I was tasked that such app should be relatively easy in Qt?

[artt]

Any suggestions? Would show any framework for this app, at list nessesary functions, then I would handle it be myself?

[d_stranz]

Your Qt installation comes with a whole slew of examples. Look at the DirView, File System, and maybe the XML Schema Validation examples. There is a Getting Started with Qt Widget tutorial, also installed with your Qt distro.

[artt]

But what the indexing of file system means -- how I should do it exactly? Should I do some DB of all files of disk or directory -- or directory files should be dislayed in some UI window with some files pictograms as usual windows?
And I have recently seen that search aslo could be done by QFileInfo, despite it has such attributes as size, path of files.
What main fuctions I should use: funct1 (Q...1), func2 (Q..2) XML, func3 (Q..2) search?
If I use Qcreator -- how connect it with the code? And the important questions is shoudl I use a lot of signals or slots as this constructions is new for me?
So the first task--hwo to index the file system ...then it would be more understandable for me as to do evrything else

[stampede]

What main fuctions I should use: funct1 (Q...1), func2 (Q..2) XML, func3 (Q..2) search?
If I use Qcreator -- how connect it with the code? And the important questions is shoudl I use a lot of signals or slots as this constructions is new for me?

With your lack of experience in Qt I suggest you to start with something basic, like selecting a file and displaying its stats (name, size, creation date etc) in a simple widget. You know, "Rome was not built in a day."