General and Desktop

Oh, I already have from Qt Creator's source code. :) It's just that I am still struggling about the overall structure of the source code, so I tend to use it as a last resource.

bq. Translation: How to make fewer errors at the stage of code writing. Part N3. http://www.viva64.com/en/a/0075/ nice link @Andrey_Karpov

You can also include the "help framework":http://developer.qt.nokia.com/doc/qt-4.7/qthelp-framework.html that's provided by Qt. You can find a simple example "here":http://developer.qt.nokia.com/doc/qt-4.7/examples-helpsystem.html

Thanks, the last one worked fine :)

Thanks. mapFromGlobal() is that thing that I searching for.

Congratulation to your success!

I just want to make you aware of on option to store such information user names and related information into a file. "QSettings ":http://doc.qt.nokia.com/4.7/qsettings.html Typically QSettins facilitates that quite nicely for different applications and platforms. On windows you have the option to store in ini-files and also for linux the data are more easily maintained compared to hand-knitted files. You may use the file structure behind the scenes and open it from any place in your program. Maybe that would be of help. I cannot answer your quite detailed question above. main.cpp is just a name of a file which presumably holds most or all information of your code. It all depends on what you are trying to achieve and how your program is setup. I guess it is somehow possible, but there is no way to provide details without knowing more. Anyhow, I think it would be good if you have a look to the possibilities of QSettings.

Try to use QStandardItemModel directly with your QTreeView. If you can see the "child" then the problem is with your GroupSortFilterProxyModel which in your case is located between QTreeView and QStandardItemModel.

bq. So it’s not necessary to compile Qt and Qt Creator in icc? It does not matter what compiler was used to build Qt Creator. As Volker mentioned, for Qt you must use a binary compatible compiler

Here are some chunks of codes which you can run for the basic understanding of Qt meta system. @#include <QtCore/QCoreApplication> #include <iostream> using namespace std; #include <QObject> class MyApp : public QObject { Q_OBJECT public: MyApp() {} }; class MyNonQObject : public QObject { public: MyNonQObject() {} }; class MyQObject : public QObject { Q_OBJECT public: MyQObject() {} }; int main(int argc, char *argv[]) { QCoreApplication a(argc, argv); MyQObject obj; obj.setObjectName("instanceName"); QString objName = obj.objectName(); QString clasName = obj.metaObject()->className(); cout << "MyQObject objName: " << objName.toStdString() <<endl; cout << "MyQObject className: " << clasName.toStdString() <<endl; bool isherited = obj.inherits("QObject"); cout << "Derive from QObject ? " << isherited << endl; isherited = obj.inherits("QWideget"); cout << "Derive from QWideget ? " << isherited << endl; MyNonQObject obj2; clasName = obj2.metaObject()->className(); cout << "MyNonQObject className: " << clasName.toStdString() <<endl; int sizeOfQObject = sizeof(QObject); cout << "size of QObject: " << sizeOfQObject <<endl; return a.exec&#40;&#41;; } @

changsheng230, socket is always socket and it doesn't matter what os/arch sits on the other side. What do you mean by "socket programming which iOS/Android supported"?

Cool thanks, it works!

You are trying to mix OpenGL rendering with QPainter painting and you are also trying to paint on the widget outside of the paint event. If you want to ue QPainter in addition to OpenGL - ie not using OpenGL to draw all of yoru scene then I suggest you have a read of the the "OpenGL overpainting example":http://doc.qt.nokia.com/latest/opengl-overpainting.html.

Ok, I have just fixed the issue I mentioned above. Clearly still learning about (powerful) delegates... ( https://github.com/opencor/opencor/commit/5334d6b3c6f150643d1ede14b3471bae41044e03 )

ok.sure.

thank you all my problem is solved

Thanks for a very long and nice explanation. I have to admit that this forum is probably the best forum I know :) My friend's given me some links about security and I hope they'd answer my question how I can protect from potential attacks. Topic can be closed. Thx again!

i had made a change and copy my box2d folder in my working folder., SOURCES += main.cpp INCLUDEPATH += $$PWD/Box2D_v2.0.1/Box2D/Include LIBPATH += $$PWD/Box2D_v2.0.1/Box2D/Source/Gen/float LIBS += -lbox2d but the problem still occures..

There is an example of that on the wiki: "Browser for QDebug output":http://developer.qt.nokia.com/wiki/Browser_for_QDebug_output