C++ QListViewItem::itemBelow方法代码示例

void UserAgentDlg::deletePressed()
{
    QListViewItem *item;
    QListViewItem *nextItem = 0;

    item = dlg->lvDomainPolicyList->firstChild();

    while(item != 0L)
    {
        if(dlg->lvDomainPolicyList->isSelected(item))
        {
            nextItem = item->itemBelow();
            if(!nextItem)
                nextItem = item->itemAbove();

            delete item;
            item = nextItem;
        }
        else
        {
            item = item->itemBelow();
        }
    }

    if(nextItem)
        dlg->lvDomainPolicyList->setSelected(nextItem, true);

    updateButtons();
    configChanged();
}

void ChaserEditor::slotLowerClicked()
{
  QListViewItem* currentItem = m_functionList->currentItem();

  if (currentItem != NULL)
    {
      QString deviceString = currentItem->text(1);
      QString functionString = currentItem->text(2);

      QListViewItem* below = NULL;
      if (currentItem->itemBelow() != NULL)
	{
	  below = currentItem->itemBelow();
	}

      if (below != NULL)
	{
	  m_functionList->takeItem(currentItem);
	  delete currentItem;
	  QListViewItem* newItem;
	  newItem = new QListViewItem(m_functionList, below, "", deviceString, functionString);
	  m_functionList->setSelected(newItem, true);
	}
    }
  updateOrderNumbers();
}

void ZLQtSelectionDialogListView::keyPressEvent(QKeyEvent *event) {
	QListViewItem *item = currentItem();
	switch(event->key()) {
		case Key_Enter:
		case Key_Return:
			if (item != 0)
				emit returnPressed(item);
			return;
		case Key_Down:
			item = item->itemBelow();
			if (item == 0) {
				item = firstChild();
			}
			break;
		case Key_Up:
			item = item->itemAbove();
			if (item == 0) {
				item = firstChild();
				while (item->nextSibling() != 0) {
					item = item->nextSibling();
				}
				while (item->itemBelow() != 0) {
					item = item->itemBelow();
				}
			}		
			break;
		default:
			QListView::keyPressEvent(event);
	}

	if (item != 0) {
		setCurrentItem(item);
		ensureItemVisible(item);
	}
}

void LayoutConfig::moveDown()
{
    QListViewItem *sel = widget->listLayoutsDst->selectedItem();
    if(sel == 0 || sel->itemBelow() == 0)
        return;

    sel->moveItem(sel->itemBelow());
}

/* config-slot: "down" button clicked */
void TopLevel::downButtonClicked() {
	QListViewItem* item = listbox->currentItem();

	if (item && item->itemBelow())
		item->moveItem(item->itemBelow());

	enable_controls();
}

bool PropertyEditor::handleKeyPress(QKeyEvent* ev) {
    const int k = ev->key();
    const Qt::ButtonState s = ev->state();

    //selection moving
    QListViewItem *item = 0;

    if ((s == NoButton && k == Key_Up) || k == Key_BackTab) {
        //find prev visible
        item = selectedItem() ? selectedItem()->itemAbove() : 0;
        while (item && (!item->isSelectable() || !item->isVisible()))
            item = item->itemAbove();

        if (!item)
            return true;
    } else if (s == NoButton && (k == Key_Down || k == Key_Tab)) {
        //find next visible
        item = selectedItem() ? selectedItem()->itemBelow() : 0;
        while (item && (!item->isSelectable() || !item->isVisible()))
            item = item->itemBelow();

        if (!item)
            return true;
    } else if (s == NoButton && k == Key_Home) {
        if (m_currentEditor && m_currentEditor->hasFocus())
            return false;

        //find 1st visible
        item = firstChild();
        while (item && (!item->isSelectable() || !item->isVisible()))
            item = item->itemBelow();
    } else if (s == NoButton && k == Key_End) {
        if (m_currentEditor && m_currentEditor->hasFocus())
            return false;

        //find last visible
        item = selectedItem();
        QListViewItem *lastVisible = item;
        while (item) { // && (!item->isSelectable() || !item->isVisible()))
            item = item->itemBelow();
            if (item && item->isSelectable() && item->isVisible())
                lastVisible = item;
        }

        item = lastVisible;
    }

    if (item) {
        ev->accept();
        ensureItemVisible(item);
        setSelected(item, true);
        return true;
    }

    return false;
}

void PhraseBookBox::removePhrase()
{
    QListViewItem *item = lv->currentItem();
    QListViewItem *next = item->itemBelow() != 0 ? item->itemBelow()
			  : item->itemAbove();
    delete item;
    if ( next != 0 )
	selectItem( next );
    enableDisable();
}

/** Button Down */
void KControlAddEdit::slotMoveDownAnswer()
{
    QListViewItem *item = _listAnswers->currentItem();

    if (item)
        item->moveItem(item->itemBelow());

    _buttonUp->setEnabled(item->itemAbove()!=0);
    _buttonDown->setEnabled(item->itemBelow()!=0);
}

void BookmarksSettingsPage::moveBookmark(int direction)
{
    // this implementation currently only allows moving of bookmarks
    // one step up or down
    assert((direction >= -1) && (direction <= +1));

    // swap bookmarks in listview
    QListViewItem* selectedItem = m_listView->selectedItem();
    assert(selectedItem != 0);
    QListViewItem* item = (direction < 0) ? selectedItem->itemAbove() :
                          selectedItem->itemBelow();
    assert(item != 0);

    QPixmap pixmap;
    if (item->pixmap(0) != 0) {
        pixmap = *(item->pixmap(0));
    }
    QString name(item->text(NameIdx));
    QString url(item->text(URLIdx));
    QString icon(item->text(IconIdx));

    if (selectedItem->pixmap(0) != 0) {
        item->setPixmap(PixmapIdx, *(selectedItem->pixmap(0)));
    }
    item->setText(NameIdx, selectedItem->text(NameIdx));
    item->setText(URLIdx, selectedItem->text(URLIdx));
    item->setText(IconIdx, selectedItem->text(IconIdx));

    selectedItem->setPixmap(PixmapIdx, pixmap);
    selectedItem->setText(NameIdx, name);
    selectedItem->setText(URLIdx, url);
    selectedItem->setText(IconIdx, icon);

    m_listView->setSelected(item, true);
}

static bool listViewHasSelection( QListView *lv )
{
    for ( QListViewItem *i = lv->firstChild(); i; i = i->itemBelow() )
        if ( i->isSelected() )
            return true;
    return false;
}

void DlgDirectories::updateUpDown()
{
    QListViewItem *item = lv_entries->selectedItem();

    pb_up->setEnabled( item && item->itemAbove() );
    pb_down->setEnabled( item && item->itemBelow() );
}

void FolderListView::startDrag()
{
QListViewItem *item = currentItem();
if (!item)
	return;

if (item == firstChild() && item->listView()->rootIsDecorated())
	return;//it's the project folder so we don't want the user to move it

QPoint orig = viewportToContents( viewport()->mapFromGlobal( QCursor::pos() ) );

QPixmap pix;
if (item->rtti() == FolderListItem::ListItemType)
	pix = QPixmap( folder_closed_xpm );
else
	pix = *item->pixmap (0);

QIconDrag *drag = new QIconDrag(viewport());
drag->setPixmap(pix, QPoint(pix.width()/2, pix.height()/2 ) );

QPtrList<QListViewItem> lst;
for (item = firstChild(); item; item = item->itemBelow())
	{
	if (item->isSelected())
		lst.append(item);
	}

emit dragItems(lst);
drag->drag();
}

void QTodoLists::contentsWheelEvent(QWheelEvent* event)
{
	if(!firstChild())
		return;

	QListViewItem* item = selectedItem();
	if(event->delta() < 0)
	{
		if(!item)
			item = lastItem();

		item = item->itemBelow();
		if(!item)
			item = firstChild();
	}
	else
	{
		if(!item)
			item = firstChild();

		item = item->itemAbove();
		if(!item)
			item = lastItem();
	}
	setSelected(item,true);
}

/*! Now to implement the closest match function */
void TVListView::findItem(int keyId, TVVariant value)
{
    QListViewItem *i;
    TVListViewItem *best_so_far = NULL;
    /* start at the beginning... go through till find the closest elem */
    i = listViewDisplay->firstChild();
    while (i) {
        /* search stuff */
        if(best_so_far) {
            if (DataElem::closer(
                    ((TVListViewItem *)i)->getDataElem(),
                    best_so_far->getDataElem(), value, keyId))
                best_so_far = (TVListViewItem *)i;
        } else {
            if (DataElem::closer(
                    ((TVListViewItem *)i)->getDataElem(),
                    NULL, value, keyId))
                best_so_far = (TVListViewItem *)i;
        }

        i = i->itemBelow();
    }
    if (best_so_far) {
        /* set best_so_far to current element */
        delete it;
        it = new QListViewItemIterator(best_so_far);
    }
}

void DirectoryView::setDir( const QString &s )
{
  QListViewItemIterator it( this );
  ++it;
  for ( ; it.current(); ++it ) {
    it.current()->setOpen( false );
  }

  QStringList lst( QStringList::split( "/", s ) );
  QListViewItem *item = firstChild();
  QStringList::Iterator it2 = lst.begin();
  for ( ; it2 != lst.end(); ++it2 ) {
    while ( item ) {
      if ( item->text( 0 ) == *it2 ) {
        item->setOpen( true );
        break;
      }
      item = item->itemBelow();
    }
  }

  if ( item ){
    setSelected( item, true );
    setCurrentItem( item );
  }
}