/*!
\internal
\fn void Bouncer::animate(QPainter *painter,SelectedItem *item,qreal percent)
*/
void Bouncer::animate(QPainter *painter,SelectedItem *item,qreal percent)
{
GridItem *currentItem = item->current();
if ( !currentItem ) {
return;
}
int imageSize = currentItem->selectedImageSize();
// Create an oscillator which will produce a sin wave whose lower bound is the
// first parameter (i.e. the lowest dimension the image will take, and whose
// upper bound is the second parameter (i.e. the highest dimension the image
// will take).
Oscillator oscillator(imageSize + minVariation * imageSize,
imageSize + maxVariation * imageSize,
frameMax, // upper bound of x
SPEED_FACTOR,
imageSize);
// Ask the oscillator to produce a suitable width/height value for this stage
// of the animation.
int y = qRound(oscillator(percent*frameMax));
if (((y-imageSize) % 2) != 0) {
y -= 1;
}
painter->setRenderHint(QPainter::SmoothPixmapTransform);
//lazy man's version of mipmapping
if (y > imageSize) {
if (!bigpixmap.isNull())
draw(painter,bigpixmap,item,y,y);
} else {
const QPixmap &pixmap = currentItem->selectedPic();
if ( !(pixmap.isNull()) ) {
draw(painter,pixmap,item,y,y);
}
}
}
/*!
\internal
\fn QRectF Animator::renderingBounds(QGraphicsRectItem *item,int width,int height)
Returns the geometry for the renderer, i.e. position, width and height.
*/
QRectF Animator::renderingBounds(QGraphicsRectItem *item,int w,int h)
{
// Position the image in the middle of the drawing area.
qreal x = item->rect().x();
qreal y = item->rect().y();
x += (item->rect().width() - w)/2;
y += (item->rect().height() - h)/2;
{ // TODO: this is a workaround. not casting to ints at
// higher levels (GridItem, SelectedItem, etc) would be better solution.
GridItem *currentItem = ((SelectedItem*)item)->current();
if ( !currentItem ) {
return QRectF();
}
int imageSize = currentItem->selectedImageSize();
qreal xoffset = (static_cast<int>(item->rect().width()) - imageSize)/2 - (item->rect().width() - imageSize)/2;
qreal yoffset = (static_cast<int>(item->rect().height()) - imageSize)/2 - (item->rect().height() - imageSize)/2;
x += xoffset;
y += yoffset;
}
return QRectF(x,y,w,h);
}
