General and Desktop

I do not find installable for Qgui4 and Qtcore4 in the log. How do I go about them? I have installed Qt Quick 4.7

Please mark the post title as [Solved]. Thanks

Note that nm can demangle the symbols for you (--demangle) and you also use the c++filt utility to demangle a single symbol (e.g. one the linker is complaining about).

No problem, I just read through a huge backlog of postings :-) I'm setting this to solved.

For Qt itself that's configured at compile time with the -rtti switch. For your projects, you can add rtti do CONFIG: @ CONFIG += rtti @

To cite "QSqlQuery::size() ":http://doc.qt.nokia.com/4.7/qsqlquery.html#size: bq. Returns the size of the result (number of rows returned), or -1 if the size cannot be determined or if the database does not support reporting information about query sizes. [Emphasis by me] SQLite does not support reporting the number of rows in the result set.

I'm not sure if an editable combobox is the right approach for this... It usually is for selecting preexisting entities (a read-only combobox) or for giving some reasonable default values to choose of for a free text field. If you type on the text of an existing entry, that entry is not changed, but a new entry for the combobox is created. I'm not sure if it's possible at all to make the combo box work as you want.

HTML (on which the [[Doc:QTextDocument]] based classes rely on) are very hard to make pixel precise - if not impossible. In that case I personally would go with a QPainter and draw the contents directly. That way you have exact control over where your data is printed.

As stated above and in the docs: [quote]QFileSystemModel will not fetch any files or directories until setRootPath is called. This will prevent any unnecessary querying on the file system until that point such as listing the drives on Windows.[/quote] As for starting off at a certain node, would setRootIndex do the trick? You can retreive the index to use as root by using QFileSystemModels methods to get a QModelIndex for a path.

[quote author="RickH" date="1313418131"] The way C++ is set up, the destructor for the object-as-a-whole is called before the destructors for the objects-who-are-members. So I have to not set the parent of the member to be the object-as-a-whole. If I do, the object-as-a-whole will call delete on the member. [/quote] Yes, that's correct. And the destructor fthe object-as-a-whole will be ran before the destructors of the members. If you need parent-child relationship in this use case, use a pointer and new instead of an object variable.

Thanks Volker... Its working now , After using the setMinimumSize(hint) function . But not with the QSplitter::setChildrenCollapsible(false) Thanks for your valuable inputs..

mouse and keyboard events pass through my window Qt::WA_TransparentForMouseEvents or QWidget::setMask() -> you need to calculate region of MyWindow which can be painted and pass that to setMask function.

If you look at the Qt docs, you find many examples, e.g. the "Multimedia examples.":http://doc.qt.nokia.com/4.7/examples-multimedia.html have a look there.

thanks alot

thank you.

I "think" they are release libs because I configured with release option on. And I'm talking about static lib, 2MB QtCore and 8MB QtGUI seems unbelievable to me... Anyway, what I'm caring about is the size of the final static-linked app.

Yep, that's why I gave the second block of code (which I've just realised had the processEvents() call still in it - it wasn't meant to be there)

Depends on the work done in the callback. Usually the callback function is executed in the library's thread, which may be your main thread. If you need to feed back information into your application, it's probably a good idea to read "Threads, Events & QOjects":https://developer.qt.nokia.com/wiki/Threads_Events_QObjects for more information on how to pass event callbacks into the event loop.