How to make files preview like in native file manager?

Tundra

Hello.

Tell me please a way how to make previews of specified files on Qt + Windows.
I want to make previews like in Windows Explorer when you select View→Lafge Icons (an image below). In general files won't be located in the same folder.

Thank you for attention.

SGaist

Hi and welcome to devnet,

A starting point would be:

And maybe:

QStyledItemDelegate

Tundra

@SGaist , thank you for answer!
I found that QFileIconProvider can to provide small icons (it provides them for QDirModel and the QFileSystemModel classes).
How to get Large ones with thumbnails and etc - I didn't find yet :)

SGaist

What makes you think you can't return bigger icons ?

Tundra

@SGaist I'm trying to find a way to get not just bigger ones, but "Large icons" in Windows Explorer terminology which are thumbnails for videos and images and icons for other files :)
I tried QFileIconProvider ::icon() ─ it returns a small icon assotiated for file's extension.
Maybe I do something wrong...

SGaist

Can you show the code you are using ?

On a side note, QStyledItemDelegate gives you more freedom to paint what you want to get in your view.

Tundra

@SGaist , I tested it by this code (node.originalPath is file path in QString):

QList<QTreeWidgetItem *> items;
QTreeWidgetItem *item = new QTreeWidgetItem((QTreeWidget*)0, QStringList(node.originalPath));
QFileIconProvider provider;
item->setIcon(0, QIcon(provider.icon(node.originalPath)));
items.append(item);
treeWidget->insertTopLevelItems(0, items);

@SGaist said in How to make files preview like in native file manager?:

On a side note, QStyledItemDelegate gives you more freedom to paint what you want to get in your view.

Doesn't it mean that I should to render thumbnails by my own code for any new file format? It seems too expensive. I was hoping to get icons which are already generated by Windows Explorer (even for odt, pdf, mp4 etc, not only popular images) :).

Christian Ehrlicher

QFileIconProvider only returns you the default icons according to the extension. Anything else you have to write on your own.

Tundra

@Christian-Ehrlicher Thank you for answer =) Does QFileDialog just call native Windows dialog (It shows thumbnails pretty nice)?

Tundra

Thank you all!
Problem is resolved!
I used this: http://www.cplusplus.com/forum/windows/100661/

Tundra

Upd: Be careful ─ code in http://www.cplusplus.com/forum/windows/100661/ conteins an error. There should be resource releasing:

pIExtract->Release();

RobertZamors56

This post is deleted!