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+/**********************************************************************
+** Copyright (C) 2002 Trolltech AS. All rights reserved.
+**
+** This file is part of Qt Designer.
+**
+** This file may be distributed and/or modified under the terms of the
+** GNU General Public License version 2 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.
+**
+** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition
+** licenses may use this file in accordance with the Qt Commercial License
+** Agreement provided with the Software.
+**
+** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
+** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+**
+** See http://www.trolltech.com/gpl/ for GPL licensing information.
+** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
+** information about Qt Commercial License Agreements.
+**
+** Contact info@trolltech.com if any conditions of this licensing are
+** not clear to you.
+**
+**********************************************************************/
+
+#include "listboxdnd.h"
+#include <qwidget.h>
+#include <qheader.h>
+#include <qpainter.h>
+#include <qdragobject.h>
+#include <qvaluelist.h>
+
+// The Dragobject Declaration ---------------------------------------
+class ListBoxItemDrag : public QStoredDrag
+{
+public:
+ ListBoxItemDrag( ListBoxItemList & items, bool sendPtr = FALSE, QListBox * parent = 0, const char * name = 0 );
+ ~ListBoxItemDrag() {};
+ static bool canDecode( QDragMoveEvent * event );
+ static bool decode( QDropEvent * event, QListBox * parent, QListBoxItem * insertPoint );
+ enum ItemType { ListBoxText = 1, ListBoxPixmap = 2 };
+};
+// ------------------------------------------------------------------
+
+ListBoxDnd::ListBoxDnd( QListBox * eventSource, const char * name )
+ : ListDnd( eventSource, name ) { }
+
+void ListBoxDnd::confirmDrop( QListBoxItem * )
+{
+ dropConfirmed = TRUE;
+}
+
+bool ListBoxDnd::dropEvent( QDropEvent * event )
+{
+ if ( dragInside ) {
+
+ if ( dMode & NullDrop ) { // combined with Move, a NullDrop will delete an item
+ event->accept();
+ emit dropped( 0 ); // a NullDrop
+ return TRUE;
+ }
+
+ QPoint pos = event->pos();
+ QListBoxItem * after = itemAt( pos );
+
+ if ( ListBoxItemDrag::decode( event, (QListBox *) src, after ) ) {
+ event->accept();
+ QListBox * src = (QListBox *) this->src;
+ QListBoxItem * item = ( after ? after->next() : src->firstItem() );
+ src->setCurrentItem( item );
+ emit dropped( item ); // ###FIX: Supports only one item!
+ }
+ }
+
+ line->hide();
+ dragInside = FALSE;
+
+ return TRUE;
+}
+
+bool ListBoxDnd::mouseMoveEvent( QMouseEvent * event )
+{
+ if ( event->state() & LeftButton ) {
+ if ( ( event->pos() - mousePressPos ).manhattanLength() > 3 ) {
+
+ ListBoxItemList list;
+ buildList( list );
+ ListBoxItemDrag * dragobject = new ListBoxItemDrag( list, (dMode & Internal), (QListBox *) src );
+
+ // Emit signal for all dragged items
+ QListBoxItem * i = list.first();
+ while ( i ) {
+ emit dragged( i );
+ i = list.next();
+ }
+
+ if ( dMode & Move ) {
+ removeList( list ); // "hide" items
+ }
+
+ dragobject->dragCopy();
+
+ if ( dMode & Move ) {
+ if ( dropConfirmed ) {
+ // ###FIX: memleak ? in internal mode, only pointers are transfered...
+ //list.setAutoDelete( TRUE );
+ list.clear();
+ dropConfirmed = FALSE;
+ }
+ insertList( list ); // "show" items
+ }
+ }
+ }
+ return FALSE;
+}
+
+int ListBoxDnd::buildList( ListBoxItemList & list )
+{
+ QListBoxItem * i = ((QListBox *)src)->firstItem();
+ while ( i ) {
+ if ( i->isSelected() ) {
+ ((QListBox *)src)->setSelected( i, FALSE );
+ list.append( i );
+ }
+ i = i->next();
+ }
+ return list.count();
+}
+
+void ListBoxDnd::insertList( ListBoxItemList & list )
+{
+ QListBoxItem * i = list.first();
+ while ( i ) {
+ ((QListBox *)src)->insertItem( i, i->prev() );
+ i = list.next();
+ }
+}
+
+void ListBoxDnd::removeList( ListBoxItemList & list )
+{
+ QListBoxItem * i = list.first();
+ while ( i ) {
+ ((QListBox *)src)->takeItem( i ); // remove item from QListBox
+ i = list.next();
+ }
+}
+
+void ListBoxDnd::updateLine( const QPoint & dragPos )
+{
+ QListBox * src = (QListBox *) this->src;
+ QListBoxItem *item = itemAt( dragPos );
+
+ int ypos = item ?
+ ( src->itemRect( item ).bottom() - ( line->height() / 2 ) ) :
+ ( src->itemRect( ((QListBox *)src)->firstItem() ).top() );
+
+ line->resize( src->viewport()->width(), line->height() );
+ line->move( 0, ypos );
+}
+
+QListBoxItem * ListBoxDnd::itemAt( QPoint pos )
+{
+ QListBox * src = (QListBox *) this->src;
+ QListBoxItem * result = src->itemAt( pos );
+ QListBoxItem * last = src->item( src->count() - 1 );
+ int i = src->index( result );
+
+ if ( result && ( pos.y() < (src->itemRect(result).top() + src->itemHeight(i)/2) ) )
+ result = result->prev();
+ else if ( !result && pos.y() > src->itemRect( last ).bottom() )
+ result = last;
+
+ return result;
+}
+
+bool ListBoxDnd::canDecode( QDragEnterEvent * event )
+{
+ return ListBoxItemDrag::canDecode( event );
+}
+
+
+// ------------------------------------------------------------------
+// The Dragobject Implementation ------------------------------------
+// ------------------------------------------------------------------
+
+ListBoxItemDrag::ListBoxItemDrag( ListBoxItemList & items, bool sendPtr, QListBox * parent, const char * name )
+ : QStoredDrag( "qt/listboxitem", parent, name )
+{
+ // ### FIX!
+ QByteArray data( sizeof( Q_INT32 ) + sizeof( QListBoxItem ) * items.count() );
+ QDataStream stream( data, IO_WriteOnly );
+
+ stream << items.count();
+ stream << (Q_UINT8) sendPtr; // just transfer item pointer; omit data
+
+ QListBoxItem * i = items.first();
+
+ if ( sendPtr ) {
+
+ while ( i ) {
+
+ stream << (Q_ULONG) i; //###FIX: demands sizeof(ulong) >= sizeof(void*)
+ i = items.next();
+
+ }
+
+ } else {
+
+ while ( i ) {
+
+ Q_UINT8 b = 0;
+
+ b = (Q_UINT8) ( i->text() != QString::null ); // does item have text ?
+ stream << b;
+ if ( b ) {
+ stream << i->text();
+ }
+
+ b = (Q_UINT8) ( !!i->pixmap() ); // does item have a pixmap ?
+ stream << b;
+ if ( b ) {
+ stream << ( *i->pixmap() );
+ }
+
+ stream << (Q_UINT8) i->isSelectable();
+
+ i = items.next();
+ }
+
+ }
+
+ setEncodedData( data );
+}
+
+bool ListBoxItemDrag::canDecode( QDragMoveEvent * event )
+{
+ return event->provides( "qt/listboxitem" );
+}
+
+bool ListBoxItemDrag::decode( QDropEvent * event, QListBox * parent, QListBoxItem * after )
+{
+ QByteArray data = event->encodedData( "qt/listboxitem" );
+
+ if ( data.size() ) {
+ event->accept();
+ QDataStream stream( data, IO_ReadOnly );
+
+ int count = 0;
+ stream >> count;
+
+ Q_UINT8 recievePtr = 0; // data contains just item pointers; no data
+ stream >> recievePtr;
+
+ QListBoxItem * item = 0;
+
+ if ( recievePtr ) {
+
+ for( int i = 0; i < count; i++ ) {
+
+ Q_ULONG p = 0; //###FIX: demands sizeof(ulong) >= sizeof(void*)
+ stream >> p;
+ item = (QListBoxItem *) p;
+
+ parent->insertItem( item, after );
+
+ }
+
+ } else {
+
+ for ( int i = 0; i < count; i++ ) {
+
+ Q_UINT8 hasText = 0;
+ QString text;
+ stream >> hasText;
+ if ( hasText ) {
+ stream >> text;
+ }
+
+ Q_UINT8 hasPixmap = 0;
+ QPixmap pixmap;
+ stream >> hasPixmap;
+ if ( hasPixmap ) {
+ stream >> pixmap;
+ }
+
+ Q_UINT8 isSelectable = 0;
+ stream >> isSelectable;
+
+ if ( hasPixmap ) {
+ item = new QListBoxPixmap( parent, pixmap, text, after );
+ } else {
+ item = new QListBoxText( parent, text, after );
+ }
+
+ item->setSelectable( isSelectable );
+
+ }
+
+ }
+
+ return TRUE;
+ }
+ return FALSE;
+}
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