General and Desktop

Think of the viewport() as a rectangle through which you are looking at the widget(). The scrollbars determine above which part of the widget() the viewport() is floating. It is even possible to use a custom viewport. This is mostly used in the graphics scene/view framework, where it is used to set the viewport to an QGLWidget. However, you can also make a custom widget that allows you to zoom in or out on a widget using a transformation matrix. There are a lot of different possibilities by using the viewport.

Thanks Zlatomir. I am developing an application and want to use mysql or ms sql server as database so I want to activate drivers for them. Can you please tell me how to do this in QT SDK 1.1?

Can anyone please tell me how to use mysql or ms sql server with qt. I use QT SDK 1.1 Any Help will be appreciated.

It seems that the Mac os X Finder can show system services. Anybody knows if I can use the QT system framework for this: http://doc.qt.nokia.com/qtmobility-1.0-tp/service-frameworks.html Cheers Tom

Can you post a full testcase so it can be built and run through a profiler?

If you want a single image, AFAIK, you'll need to use QGraphicsItem (or QGraphicsWidget). Setting the image as a background brush will, as you've observed, result in it being tiled, because it is painted across the entirety of the background.

ohh! thanks for advice, I tried to obtain dimensions from style and it worked!!! In case some needs it here is what I did: @tempX += QApplication::style()->subElementRect(QStyle::SE_CheckBoxClickRect,&aOption).x();@

lol..i can't believe i didn't think of that, it's exactly how it's done in the example. many thanks!

[quote author="peppe" date="1295910898"]Why are you using QFileSystemModel instead of QDirIterator?[/quote] Thanks, Peppe, that's the winning idea by now:)) I came from the direction of Borland's c++Builder, and QDirIterator is closest to the good old FindFirst/FindNext. I started flirting with Qt Creator 2 weeks ago, and it's hard to review the so many classes. Sometimes the real one can't be found...

i didnt think it would, thanks

Thanks Volker. It's working now:-)

Thanks, I'll give a try. [quote author="Gerolf" date="1295865248"]you can use "QWidget::update(const QRect& rect)":http://doc.qt.nokia.com/latest/qwidget.html#update-3[/quote]

Not sure that I clearly understood what you want but I think you should read about "QMdiArea":http://doc.qt.nokia.com/4.7/qmdiarea.html in Qt Assistant.

I'm sorry, I'm a linux developer mainly, so I'm not really sure. I suspect putting them in your qt directory or the application's directory will be best. That way they won't interfere with any other openssl dlls you have on the system.

[quote author="Volker" date="1295213704"]Sometimes you have to re-run qmake to catch up changes.[/quote] This is probably the correct solution. I've done this several times myself. The standard make commands ( make, make clean, etc ) don't remake the MOC objects. Running qmake rebuilds the MOC objects for your code (since it inherits QObject), and then when you run a make, it is able to properly link to the MOC objects.

And that is a problem because...?

I don't know the internas of your program, but at some time, you create your items. and there must be some logic on how to build them. And with the same logic, it should be possible to find them. That is something, you have to solve and that is not a Qt problem, more a logical one.

Hi chintu, there are two problems. Change resizeGL() to: @ void resizeGL(int Height, int Width) { glViewport(0, 0, Width, Height); glMatrixMode(GL_PROJECTION); glLoadIdentity(); glOrtho(-200, 200, -200, 200, -1, 1); glMatrixMode(GL_MODELVIEW); }; @ OpenGL need a box for the scenario (glOrtho) and viewport was wrong. In paintGL(), your lines for drawing are wrong, change like this: @ glVertex2f(Pt[counter+1].getsx(),Pt[counter+1].getsy()); @ As hint: you need counter+i in x and y coordinate!

Thanks a lot!!!!!!!