QVariantMap ClipboardBrowser::copyIndexes(const QModelIndexList &indexes, bool serializeItems) const
{
QByteArray bytes;
QDataStream stream(&bytes, QIODevice::WriteOnly);
QByteArray text;
QByteArray uriList;
QVariantMap data;
for ( int i = 0; i < indexes.size(); ++i ) {
const QModelIndex ind = indexes.at(i);
if ( isIndexHidden(ind) )
continue;
const QVariantMap copiedItemData =
m_itemLoader ? m_itemLoader->copyItem(m, itemData(ind)) : itemData(ind);
if (serializeItems)
stream << copiedItemData;
if (indexes.size() == 1) {
data = copiedItemData;
} else {
appendTextData(copiedItemData, mimeText, &text);
appendTextData(copiedItemData, mimeUriList, &uriList);
}
}
if (serializeItems)
data.insert(mimeItems, bytes);
if (indexes.size() > 1) {
if ( !text.isNull() )
data.insert(mimeText, text);
if ( !uriList.isNull() )
data.insert(mimeUriList, uriList);
}
return data;
}
inline bool tst_isIndexHidden(const QModelIndex &index) const
{ return isIndexHidden(index); }
bool IsIndexHidden(const QModelIndex&index) const
{ return isIndexHidden(index); }
void ClipboardBrowser::preload(int minY, int maxY)
{
ClipboardBrowser::Lock lock(this);
QModelIndex ind;
int i = 0;
int y = spacing();
const int s = 2 * spacing();
int offset = verticalOffset();
// Find first index to preload.
forever {
ind = index(i);
if ( !ind.isValid() )
return;
if ( !isIndexHidden(ind) ) {
const int h = d.sizeHint(ind).height();
y += h; // bottom of item
if (y >= offset)
break;
y += s; // top of next item
}
d.setRowVisible(i, false);
++i;
}
// Absolute to relative.
y -= offset;
bool update = false;
// Preload items backwards.
forever {
const int lastIndex = i;
for ( ind = index(--i); ind.isValid() && isIndexHidden(ind); ind = index(--i) ) {}
if ( !ind.isValid() ) {
i = lastIndex;
ind = index(i);
break;
}
const QRect oldRect(visualRect(ind));
// Fetch item.
d.cache(ind);
const int h = d.sizeHint(ind).height();
// Re-layout rows afterwards if size has changed.
const int dy = h - oldRect.height();
if (dy != 0) {
maxY += dy;
update = true;
}
// Done?
y -= h; // top of item
if (y + h < minY)
break;
y -= s; // bottom of previous item
}
y = visualRect(ind).y();
bool lastToPreload = false;
// Render visible items, re-layout rows and correct scroll offset.
forever {
if (m_lastFiltered != -1 && m_lastFiltered < i)
break;
const QRect oldRect(update ? QRect() : visualRect(ind));
// Fetch item.
d.cache(ind);
const int h = d.sizeHint(ind).height();
// Re-layout rows afterwards if row position or size has changed.
if (!update)
update = (y != oldRect.y() || h != oldRect.height());
// Correct widget position.
d.updateRowPosition(i, y);
d.setRowVisible(i, true);
// Next.
ind = index(++i);
// Done?
y += h + s; // top of item
if (y > maxY) {
if (lastToPreload)
break;
lastToPreload = true; // One more item to preload.
}
// Skip hidden.
for ( ; ind.isValid() && isIndexHidden(ind); ind = index(++i) ) {}
if ( !ind.isValid() )
break;
}
// Hide the rest.
for ( ; i < m.rowCount(); ++i )
d.setRowVisible(i, false);
if (update)
scheduleDelayedItemsLayout();
}
