listvieweditorimpl.cpp

Trolltech公司发布的基于C++图形开发环境

    itemText->setEnabled( TRUE );
    itemChoosePixmap->setEnabled( TRUE );
    itemDeletePixmap->setEnabled( i->pixmap( itemColumn->value() ) &&
				  !i->pixmap( itemColumn->value() )->isNull() );
    itemColumn->setEnabled( TRUE );

    displayItem( i, itemColumn->value() );
}

void ListViewEditor::displayItem( QListViewItem *i, int col )
{
    itemText->blockSignals( TRUE );
    itemText->setText( i->text( col ) );
    itemText->blockSignals( FALSE );

    itemPixmap->blockSignals( TRUE );
    if ( i->pixmap( col ) )
	itemPixmap->setPixmap( *i->pixmap( col ) );
    else
	itemPixmap->setText( "" );
    itemPixmap->blockSignals( FALSE );
}

void ListViewEditor::itemColChanged( int col )
{
    QListViewItem *i = itemsPreview->currentItem();
    if ( !i )
	return;

    displayItem( i, col );
    itemDeletePixmap->setEnabled( i->pixmap( col ) && !i->pixmap( col )->isNull() );
}

void ListViewEditor::itemDeleteClicked()
{
    QListViewItem *i = itemsPreview->currentItem();
    if ( !i )
	return;

    delete i;
    if ( itemsPreview->firstChild() ) {
	itemsPreview->setCurrentItem( itemsPreview->firstChild() );
	itemsPreview->setSelected( itemsPreview->firstChild(), TRUE );
    }
}

void ListViewEditor::itemDownClicked()
{
    QListViewItem *i = itemsPreview->currentItem();
    if ( !i )
	return;

    QListViewItemIterator it( i );
    QListViewItem *parent = i->parent();
    it++;
    while ( it.current() ) {
	if ( it.current()->parent() == parent )
	    break;
	it++;
    }

    if ( !it.current() )
	return;
    QListViewItem *other = it.current();

    i->moveItem( other );
}

void ListViewEditor::itemNewClicked()
{
    QListViewItem *item = new QListViewItem( itemsPreview );
    item->setText( 0, "Item" );
    item->setRenameEnabled( 0, TRUE );
    itemsPreview->setCurrentItem( item );
    itemsPreview->setSelected( item, TRUE );
    itemText->setFocus();
    itemText->selectAll();
}

void ListViewEditor::itemNewSubClicked()
{
    QListViewItem *parent = itemsPreview->currentItem();
    QListViewItem *item = 0;
    if ( parent ) {
	item = new QListViewItem( parent );
	parent->setOpen( TRUE );
    } else {
	item = new QListViewItem( itemsPreview );
    }
    item->setText( 0, "Subitem" );
    item->setRenameEnabled( 0, TRUE );
    itemsPreview->setCurrentItem( item );
    itemsPreview->setSelected( item, TRUE );
}

void ListViewEditor::itemPixmapChoosen()
{
    QListViewItem *i = itemsPreview->currentItem();
    if ( !i )
	return;

    QPixmap pix;
    if ( itemPixmap->pixmap() )
	pix = qChoosePixmap( this, formwindow, *itemPixmap->pixmap() );
    else
	pix = qChoosePixmap( this, formwindow, QPixmap() );

    if ( pix.isNull() )
	return;

    i->setPixmap( itemColumn->value(), QPixmap( pix ) );
    itemPixmap->setPixmap( pix );
    itemDeletePixmap->setEnabled( TRUE );
}

void ListViewEditor::itemPixmapDeleted()
{
    QListViewItem *i = itemsPreview->currentItem();
    if ( !i )
	return;

    i->setPixmap( itemColumn->value(), QPixmap() );
    itemPixmap->setText( "" );
    itemDeletePixmap->setEnabled( FALSE );
}

void ListViewEditor::itemTextChanged( const QString &txt )
{
    QListViewItem *i = itemsPreview->currentItem();
    if ( !i )
	return;
    i->setText( itemColumn->value(), txt );
}

void ListViewEditor::itemUpClicked()
{
    QListViewItem *i = itemsPreview->currentItem();
    if ( !i )
	return;

    QListViewItemIterator it( i );
    QListViewItem *parent = i->parent();
    --it;
    while ( it.current() ) {
	if ( it.current()->parent() == parent )
	    break;
	--it;
    }

    if ( !it.current() )
	return;
    QListViewItem *other = it.current();

    other->moveItem( i );
}

void ListViewEditor::itemRightClicked()
{
    QListViewItem *i = itemsPreview->currentItem();
    if ( !i )
	return;

    QListViewItemIterator it( i );
    QListViewItem *parent = i->parent();
    parent = parent ? parent->firstChild() : itemsPreview->firstChild();
    if ( !parent )
	return;
    it++;
    while ( it.current() ) {
	if ( it.current()->parent() == parent )
	    break;
	it++;
    }

    if ( !it.current() )
	return;
    QListViewItem *other = it.current();

    for ( int c = 0; c < itemsPreview->columns(); ++c ) {
	QString s = i->text( c );
	i->setText( c, other->text( c ) );
	other->setText( c, s );
	QPixmap pix;
	if ( i->pixmap( c ) )
	    pix = *i->pixmap( c );
	if ( other->pixmap( c ) )
	    i->setPixmap( c, *other->pixmap( c ) );
	else
	    i->setPixmap( c, QPixmap() );
	other->setPixmap( c, pix );
    }

    itemsPreview->setCurrentItem( other );
    itemsPreview->setSelected( other, TRUE );
}

void ListViewEditor::itemLeftClicked()
{
    QListViewItem *i = itemsPreview->currentItem();
    if ( !i )
	return;

    QListViewItemIterator it( i );
    QListViewItem *parent = i->parent();
    if ( !parent )
	return;
    parent = parent->parent();
    --it;
    while ( it.current() ) {
	if ( it.current()->parent() == parent )
	    break;
	--it;
    }

    if ( !it.current() )
	return;
    QListViewItem *other = it.current();

    for ( int c = 0; c < itemsPreview->columns(); ++c ) {
	QString s = i->text( c );
	i->setText( c, other->text( c ) );
	other->setText( c, s );
	QPixmap pix;
	if ( i->pixmap( c ) )
	    pix = *i->pixmap( c );
	if ( other->pixmap( c ) )
	    i->setPixmap( c, *other->pixmap( c ) );
	else
	    i->setPixmap( c, QPixmap() );
	other->setPixmap( c, pix );
    }

    itemsPreview->setCurrentItem( other );
    itemsPreview->setSelected( other, TRUE );
}

void ListViewEditor::setupColumns()
{
    QHeader *h = listview->header();
    for ( int i = 0; i < (int)h->count(); ++i ) {
	Column col;
	col.text = h->label( i );
	col.pixmap = QPixmap();
	if ( h->iconSet( i ) )
	    col.pixmap = h->iconSet( i )->pixmap();
	col.clickable = h->isClickEnabled( i );
	col.resizable = h->isResizeEnabled( i );
	if ( !col.pixmap.isNull() )
	    col.item = new QListBoxPixmap( colPreview, col.pixmap, col.text );
	else
	    col.item = new QListBoxText( colPreview, col.text );
	columns.append( col );
    }

    colText->setEnabled( FALSE );
    colPixmap->setEnabled( FALSE );
    colClickable->setEnabled( FALSE );
    colResizable->setEnabled( FALSE );

    if ( colPreview->firstItem() )
	colPreview->setCurrentItem( colPreview->firstItem() );
    numColumns = colPreview->count();
}

void ListViewEditor::setupItems()
{
    itemColumn->setMinValue( 0 );
    itemColumn->setMaxValue( QMAX( numColumns - 1, 0 ) );
    int i = 0;
    QHeader *header = itemsPreview->header();
    for ( QListBoxItem *item = colPreview->firstItem(); item; item = item->next() ) {
	Column *col = findColumn( item );
	if ( !col )
	    continue;
	if ( i >= itemsPreview->columns() )
	    itemsPreview->addColumn( col->text );
	header->setLabel( i, col->pixmap, col->text );
	header->setResizeEnabled( col->resizable, i );
	header->setClickEnabled( col->clickable, i );
	++i;
    }
    while ( itemsPreview->columns() > i )
	itemsPreview->removeColumn( i );

    itemColumn->setValue( QMIN( numColumns - 1, itemColumn->value() ) );
}

ListViewEditor::Column *ListViewEditor::findColumn( QListBoxItem *i )
{
    if ( !i )
	return 0;

    for ( QValueList<Column>::Iterator it = columns.begin(); it != columns.end(); ++it ) {
	if ( ( *it ).item == i )
	    return &( *it );
    }

    return 0;
}

void ListViewEditor::initTabPage( const QString &page )
{
    numColumns = colPreview->count();
    if ( page == tr( "&Items" ) ) {
	setupItems();
	if ( numColumns == 0 ) {
	    itemNew->setEnabled( FALSE );
	    itemNewSub->setEnabled( FALSE );
	    itemText->setEnabled( FALSE );
	    itemChoosePixmap->setEnabled( FALSE );
	    itemDeletePixmap->setEnabled( FALSE );
	    itemColumn->setEnabled( FALSE );
	} else {
	    itemNew->setEnabled( TRUE );
	    itemNewSub->setEnabled( TRUE );
	}
    }
}

void ListViewEditor::emitItemRenamed( QListViewItem *, int, const QString & text )
{
    emit itemRenamed( text ); // Relay signal ( to QLineEdit )
}