void setTwoColumns(const bool twoColumns)
{
if(twoColumns == m_twoColumns)
return;
Q_Q(SimpleListView);
m_twoColumns = twoColumns;
#if (QT_VERSION >= 0x040600)
bool cache = q->listItemCaching();
q->setListItemCaching(false);
#endif
QList<QGraphicsLayoutItem *> moveditems;
if(twoColumns) {
int half = m_layout->count()/2;
for (int i = m_layout->count()-1; i>=half; --i) {
QGraphicsLayoutItem *item = m_layout->itemAt(i);
m_layout->removeAt(i);
moveditems.append(item);
}
for ( int i = 0; i < moveditems.count(); ++i)
m_layout->addItem(moveditems.at(i), i, 1);
m_layout->setColumnSpacing(0,0);
m_layout->setColumnSpacing(1,0);
m_layout->setRowSpacing(0,0);
m_layout->setRowSpacing(1,0);
}
else {
int count = m_layout->count()/2;
for (int i = m_layout->count()-1; i>=0; --i) {
if (i >= count)
moveditems.append(m_layout->itemAt(i));
else
moveditems.insert(moveditems.begin(), m_layout->itemAt(i));
m_layout->removeAt(i);
}
for (int i = 0; i<moveditems.count(); ++i) {
m_layout->addItem(moveditems.at(i), m_layout->count(), 0);
}
}
resizeContents(q->size());
resizeScrollBars();
#if (QT_VERSION >= 0x040600)
q->setListItemCaching(cache);
#endif
}
/*!
Move such that (x,y) is visible and with at least the given
pixel margins (if possible, otherwise, centered).
*/
void QwViewport::ensureVisible(int x, int y, int xmargin, int ymargin)
{
// Algorithm taken from my WAX++ original
int pw=portHole()->width();
int ph=portHole()->height();
QWidget* child=viewedWidget();
if (!child) return;
int cx=child->x();
int cy=child->y();
int cw=child->width();
int ch=child->height();
// int mbw=0; // XXX border width - is this a problem in Qt?
if (pw < xmargin*2) xmargin=pw/2;
if (ph < ymargin*2) ymargin=ph/2;
if (cw <= pw) { xmargin=0; cx=0; }
if (ch <= ph) { ymargin=0; cy=0; }
if (x < -cx+xmargin) {
cx = -x+pw-xmargin;
} else if (x >= -cx+pw-xmargin) {
cx = -x+xmargin;
}
if (y < -cy+ymargin) {
cy = -y+ph-ymargin;
} else if (y >= -cy+ph-ymargin) {
cy = -y+ymargin;
}
if (cx > 0) cx=0;
else if (cx < pw-cw && cw>pw) cx=pw-cw;
if (cy > 0) cy=0;
else if (cy < ph-ch && ch>ph) cy=ph-ch;
// Choke signal handling while we update BOTH sliders.
signal_choke=true;
child->move(cx,cy);
vbar.setValue(-cy);
hbar.setValue(-cx);
resizeScrollBars();
signal_choke=false;
}
/*!
An override - ensures scrollbars are correct size upon resize.
*/
void QwViewport::resizeEvent(QResizeEvent* event)
{
QWidget::resizeEvent(event);
resizeScrollBars();
}
/*!
An override - ensures scrollbars are correct size upon showing.
*/
void QwViewport::show()
{
resizeScrollBars();
QWidget::show();
}