PLZ help...QT S60 Example

[chirpylife]

Hello,
Can anyone please explain following code snippet


virtual void setGeometry(const QRectF &rect)
{
QGraphicsWidget::setGeometry(rect);

if (rect.size().width() > orig.size().width())
p = orig.scaled(rect.size().toSize());
else
p = orig;
}

this code have been taken from following link following

http://qt.nokia.com/doc/4.6/animatio...-main-cpp.html
Am not able to understand
1.How,where the function setGeometry is called.
2.How the values of rect are getting changed.

I am struggling with this from a long time....please help me by providing any kind of links related.

Thanks a lot
Regards
Chirpylife

[divanov]

Is it really S60 example?

setGeometry is called in the main function.

Unfortunately I was not able to understand the second question.

[chirpylife]

hey Daniil,
thanks a lot for your quick reply,
I am using this example on N97 emulator...So I mentioned it as s60 example..Am sorry am new to this platform..
ya setGeometry() is called in main ..@

p1->setGeometry(QRectF(0.0, 0.0, 64.0, 64.0));

But if you debug it this particular function is called repeatedly...
and the value of the rectangle rect which is given as parameter width is changing...
I think that this change in rect is occurred for animation purpose, but am not clear how this is being done.
Hope you got my problem
Thanks Danill

Chirpylife

[divanov]

But if you debug it this particular function is called repeatedly...
and the value of the rectangle rect which is given as parameter width is changing...
I think that this change in rect is occurred for animation purpose, but am not clear how this is being done.

Animation of geometry property is defined in createStates and createAnimations.

[treinio]

Hi,

Yes, setGeometry is called repeatedly for each object, because Qt animation framework and state machine are used for animating the 'geometry' property of the objects.

The code you're asking about scales up the pixmap, if the size passed to setGeometry is bigger than the original size of the pixmap. As the end result, when you click on an object, there will be an animation where the object moves to the center of the scene and its size increases.

Read up more here:

http://doc.trolltech.com/solutions/4...animation.html
http://doc.trolltech.com/solutions/4...chine-api.html

BTW, there's nothing S60-specific in this example.