[Qt-interest] adding a QGraphicsPixmapItem

[Malyushytsky, Alex]

You re-implemented  advance().
That what caused the item move.
Make it do nothing and it will not animate.

Alex


From: pmqt71 [mailto:pmqt71 at gmail.com]
Sent: Thursday, October 21, 2010 3:43 PM
To: Malyushytsky, Alex; qt-interest at trolltech.com
Subject: Re: [Qt-interest] adding a QGraphicsPixmapItem

I'm using Qt 4.6.2 on xp, VC++ Express 2008.

I partially solved overriding the paint method and drawing the pixmap using the painter:

painter->drawPixmap(0, 0, 20, 20, m_pixmap);

But I still have the strange problem calling the scene's update method after moving the pixmap:

class MyQGraphicsPixmapItem: public QGraphicsPixmapItem
{
...
void advance(int step)
{
    if(!step) return;
    moveBy(1, 0);

    //ok
    this->scene()->update();

    //nok, the pixmap starts from the scene's center and moves to its position.
    //this->scene()->update( 0, 0, 20, 20);

}
};

I'm now searching the documentation to improve the update part, but I'd like to know what causes the strange animation.

pm


2010/10/21 Malyushytsky, Alex <alex at wai.com<mailto:alex at wai.com>>
What version of Qt you are using?
That sounds weird, when I use QGraphicsPixmapItem it just displayed at the location it supposed to be .

Alex

From: qt-interest-bounces at trolltech.com<mailto:qt-interest-bounces at trolltech.com> [mailto:qt-interest-bounces at trolltech.com<mailto:qt-interest-bounces at trolltech.com>] On Behalf Of pmqt71
Sent: Thursday, October 21, 2010 6:17 AM
To: qt-interest at trolltech.com<mailto:qt-interest at trolltech.com>
Subject: [Qt-interest] adding a QGraphicsPixmapItem

Hi all,
adding a QGraphicsPixmapItem on a QGraphicsScene, I see a short animation showing the pixmap moving from the scene's center to the top-right corner.

How to disable this effect? I just want the pixmap in the top-right corner of the scene.

the statement is:
QGraphicsPixmapItem* item = gs->addPixmap(pixmap);
thanks
pm




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