path to qt source

Hello forum

I have the Qt 4.4 installed in Ubuntu 8.10 through the repository.

I need to get some of the source files .cpp to get to see some function definition. So far i have found the header files under


/usr/include/qt4/Qt/


i need to get to the Qt source files of all these header files.

Thanks
Sajjad

There's no reason you should have the source files; they're not needed for normal uses. You'll probably only have them if you've installed the development packages.

Try looking for a likely candiate, with something like 'locate qsound.cpp'. If you come up empty, you'll need to install the development packages.

Hi

I needed to know how to use the data() function for the QGraphicsItem class. Do you know any example that over-ridden this function?

The small snippet inside thE Qt Assistant seems not to be enough for me to understand.


Thanks
Sajjad

From the documentation:

Quote:

---

Custom item data is useful for storing arbitrary properties for any item. Qt does not use this feature for storing data; it is provided solely for the convenience of the user.

---

So you can stuff an arbitrary item of data of any type understood by QVariant into a QGraphicsItem, and retrieve it later. This might be useful if you need to keep track of a single value - a user's name, for example, or a floating point value or some such - instead of deriving your own class to hold a more complex assortment of data.

Furthermore the method is not virtual so overriding it doesn't make any sense. And the source code for the method will not do you much good, here it is:

Code:

---

QVariant QGraphicsItem::data(int key) const
{
    QGraphicsItemCustomDataStore *store = qt_dataStore();
    if (!store->data.contains(this))
        return QVariant();
    return store->data.value(this).value(key);
}

---