void QRegion::translate( int dx, int dy )
{
if ( !data->rgn )
return;
detach();
POINTL ptl = { dx, -dy };
GpiOffsetRegion( qt_display_ps(), data->rgn, &ptl);
}
/*!
* \internal
* Updates the region handle so that it is suitable for selection to
* a device with the given \a height.
*/
void QRegion::updateHandle( int target_height ) const
{
QRegion *that = const_cast< QRegion *>( this ); // we're const here
if ( !data->rgn ) {
// a handle of a null region is requested, allocate an empty region
that->data->rgn = GpiCreateRegion( qt_display_ps(), 0, NULL );
that->data->hgt = target_height;
} else if ( data->hgt != target_height ) {
// align region y axis to the top of the device
POINTL ptl = { 0, target_height - data->hgt };
GpiOffsetRegion( qt_display_ps(), data->rgn, &ptl );
that->data->hgt = target_height;
}
}
/*!
\internal
Updates the region handle so that it is suitable for selection to
a device with the given \a height.
*/
void QRegion::updateHandle(int targetHeight) const
{
QRegion *self = const_cast<QRegion*>(this); // we're const here
if (d->rgn != 0) {
if (self->d->ref == 1) {
// align region y axis to the top of the device
POINTL ptl = { 0, targetHeight - d->height };
GpiOffsetRegion(qt_display_ps(), d->rgn, &ptl);
self->d->height = targetHeight;
return;
}
// create a copy since the hande may be in use (this will reset d->rgn)
*self = copy();
}
Q_ASSERT(d->rgn == 0);
// new/updated/copied Qt region data, create a new HRGN for it
self->d->height = targetHeight;
if (d->qt_rgn) {
if (d->qt_rgn->numRects > 0) {
if (d->qt_rgn->numRects == 1) {
// d->qt_rgn->rects is empty, use d->qt_rgn->extents instead
const QRect r = d->qt_rgn->extents;
RECTL rcl = { r.left(), d->height - (r.bottom() + 1),
r.right() + 1, d->height - r.top() };
self->d->rgn = GpiCreateRegion(qt_display_ps(), 1, &rcl);
} else {
PRECTL rcls = new RECTL[d->qt_rgn->numRects];
for (int i = 0; i < d->qt_rgn->numRects; ++i) {
QRect r = d->qt_rgn->rects.at(i);
// note RECTL is inclusive-exclusive here
rcls[i].xLeft = r.left();
rcls[i].yBottom = d->height - (r.bottom() + 1);
rcls[i].xRight = r.right() + 1;
rcls[i].yTop = d->height - r.top();
}
self->d->rgn = GpiCreateRegion(qt_display_ps(),
d->qt_rgn->numRects, rcls);
delete[] rcls;
}
return;
}
}
// create an empty region
self->d->rgn = GpiCreateRegion(qt_display_ps(), 0, NULL);
}
