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-/**********************************************************************
-** Copyright (C) 2002 Trolltech AS. All rights reserved.
-**
-** This file is part of TQt 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 TQt Enterprise Edition or TQt Professional Edition
-** licenses may use this file in accordance with the TQt 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 TQt Commercial License Agreements.
-**
-** Contact info@trolltech.com if any conditions of this licensing are
-** not clear to you.
-**
-**********************************************************************/
-
-#include "listviewdnd.h"
-#include <tqwidget.h>
-#include <tqheader.h>
-#include <tqpainter.h>
-#include <tqdragobject.h>
-#include <tqvaluelist.h>
-
-// The Dragobject Declaration ---------------------------------------
-class ListViewItemDrag : public TQStoredDrag
-{
-public:
- enum DropRelation { Sibling, Child };
- ListViewItemDrag( ListViewItemList & items, TQWidget * parent = 0, const char * name = 0 );
- ~ListViewItemDrag() {};
- static bool canDecode( TQDragMoveEvent * event );
- static bool decode( TQDropEvent * event, TQListView * parent, TQListViewItem * insertPoint, DropRelation dr );
-};
-// ------------------------------------------------------------------
-
-ListViewDnd::ListViewDnd( TQListView * eventSource, const char * name )
- : ListDnd( eventSource, name ) { }
-
-void ListViewDnd::confirmDrop( TQListViewItem * )
-{
- dropConfirmed = TRUE;
-}
-
-bool ListViewDnd::dropEvent( TQDropEvent * event )
-{
- if ( dragInside ) {
-
- if ( dMode & NullDrop ) { // combined with Move, a NullDrop will delete an item
- event->accept();
- emit dropped( 0 ); // a NullDrop
- return TRUE;
- }
-
- TQPoint pos = event->pos();
-
- ListViewItemDrag::DropRelation dr = ListViewItemDrag::Sibling;
- TQListViewItem *item = itemAt( pos );
- int dpos = dropDepth( item, pos );
-
- if ( item ) {
- if ( dpos > item->depth() && !(dMode & Flat) ) {
- // Child node
- dr = ListViewItemDrag::Child;
- } else if ( dpos < item->depth() ) {
- // Parent(s) Sibling
- while ( item && (item->depth() > dpos) )
- item = item->parent();
- }
- }
-
- if ( ListViewItemDrag::decode( event, (TQListView *) src, item, dr ) ) {
- event->accept();
- emit dropped( 0 ); // Use ID instead of item?
- }
- }
-
- line->hide();
- dragInside = FALSE;
-
- return TRUE;
-}
-
-bool ListViewDnd::mouseMoveEvent( TQMouseEvent * event )
-{
- if ( event->state() & Qt::LeftButton ) {
- if ( ( event->pos() - mousePressPos ).manhattanLength() > 3 ) {
- ListViewItemList list;
-
- if ( dMode & Flat )
- buildFlatList( list );
- else
- buildTreeList( list );
-
- ListViewItemDrag * dragobject = new ListViewItemDrag( list, (TQListView *) src );
-
- if ( dMode & Move ) {
- disabledItems = list;
- setVisibleItems( FALSE );
- }
-
- dragobject->dragCopy();
-
- if ( dMode & Move ) {
- // Did the target accept the drop?
- if ( dropConfirmed ) {
- // Shouldn't autoDelete handle this?
- for( list.first(); list.current(); list.next() )
- delete list.current();
- dropConfirmed = FALSE;
- } else {
- // Reenable disabled items since
- // drag'n'drop was aborted
- setVisibleItems( TRUE );
- }
- disabledItems.clear();
- }
- }
- }
- return FALSE;
-}
-
-int ListViewDnd::buildFlatList( ListViewItemList & list )
-{
- bool addKids = FALSE;
- TQListViewItem *nextSibling = 0;
- TQListViewItem *nextParent = 0;
- TQListViewItemIterator it = ((TQListView *)src)->firstChild();
- for ( ; *it; it++ ) {
- // Hit the nextSibling, turn of child processing
- if ( (*it) == nextSibling )
- addKids = FALSE;
-
- if ( (*it)->isSelected() ) {
- if ( (*it)->childCount() == 0 ) {
- // Selected, no children
- list.append( *it );
- } else if ( !addKids ) {
- // Children processing not set, so set it
- // Also find the item were we shall quit
- // processing children...if any such item
- addKids = TRUE;
- nextSibling = (*it)->nextSibling();
- nextParent = (*it)->parent();
- while ( nextParent && !nextSibling ) {
- nextSibling = nextParent->nextSibling();
- nextParent = nextParent->parent();
- }
- }
- } else if ( ((*it)->childCount() == 0) && addKids ) {
- // Leaf node, and we _do_ process children
- list.append( *it );
- }
- }
- return list.count();
-}
-
-int ListViewDnd::buildTreeList( ListViewItemList & list )
-{
- TQListViewItemIterator it = ((TQListView *)src)->firstChild();
- for ( ; *it; it++ ) {
- if ( (*it)->isSelected() )
- list.append( *it );
- }
- return list.count();
-}
-
-void ListViewDnd::setVisibleItems( bool b )
-{
- if ( disabledItems.isEmpty() )
- return;
-
- disabledItems.first();
- do {
- disabledItems.current()->setVisible( b );
- } while ( disabledItems.next() );
-}
-
-void ListViewDnd::updateLine( const TQPoint & dragPos )
-{
- TQListViewItem * item = itemAt(dragPos);
- TQListView * src = (TQListView *) this->src;
-
- int ypos = item ?
- ( src->itemRect( item ).bottom() - ( line->height() / 2 ) ) :
- ( src->itemRect( src->firstChild() ).top() );
-
- int xpos = dropDepth( item, dragPos ) * src->treeStepSize();
- line->resize( src->viewport()->width() - xpos, line->height() );
- line->move( xpos, ypos );
-}
-
-TQListViewItem * ListViewDnd::itemAt( TQPoint pos )
-{
- TQListView * src = (TQListView *) this->src;
- int headerHeight = (int)(src->header()->height());
- pos.ry() -= headerHeight;
- TQListViewItem * result = src->itemAt( pos );
-
- if ( result && ( pos.ry() < (src->itemPos(result) + result->height()/2) ) )
- result = result->itemAbove();
-
- // Wind back if has parent, and we're in flat mode
- while ( result && result->parent() && (dMode & Flat) )
- result = result->parent();
-
- // Wind back if has parent, and we're in flat mode
- while ( result && !result->isVisible() && result->parent() )
- result = result->parent();
-
- if ( !result && src->firstChild() && (pos.y() > src->itemRect(src->firstChild()).bottom()) ) {
- result = src->lastItem();
- if ( !result->isVisible() )
- // Handle special case where last item is actually hidden
- result = result->itemAbove();
- }
-
- return result;
-}
-
-int ListViewDnd::dropDepth( TQListViewItem * item, TQPoint pos )
-{
- if ( !item || (dMode & Flat) )
- return 0;
-
- int result = 0;
- int itemDepth = item->depth();
- int indentSize = ((TQListView *)src)->treeStepSize();
- int itemLeft = indentSize * itemDepth;
- int childMargin = indentSize*2;
- if ( pos.x() > itemLeft + childMargin ) {
- result = itemDepth + 1;
- } else if ( pos.x() < itemLeft ) {
- result = pos.x() / indentSize;
- } else {
- result = itemDepth;
- }
- return result;
-}
-
-bool ListViewDnd::canDecode( TQDragEnterEvent * event )
-{
- return ListViewItemDrag::canDecode( event );
-}
-
-// ------------------------------------------------------------------
-// The Dragobject Implementation ------------------------------------
-// ------------------------------------------------------------------
-
-TQDataStream & operator<< ( TQDataStream & stream, const TQListViewItem & item );
-TQDataStream & operator>> ( TQDataStream & stream, TQListViewItem & item );
-
-ListViewItemDrag::ListViewItemDrag( ListViewItemList & items, TQWidget * parent, const char * name )
- : TQStoredDrag( "qt/listviewitem", parent, name )
-{
- // ### FIX!
- TQByteArray data( sizeof( TQ_INT32 ) + sizeof( TQListViewItem ) * items.count() );
- TQDataStream stream( data, IO_WriteOnly );
-
- stream << items.count();
-
- TQListViewItem *i = items.first();
- while ( i ) {
- stream << *i;
- i = items.next();
- }
-
- setEncodedData( data );
-}
-
-bool ListViewItemDrag::canDecode( TQDragMoveEvent * event )
-{
- return event->provides( "qt/listviewitem" );
-}
-
-bool ListViewItemDrag::decode( TQDropEvent * event, TQListView * parent, TQListViewItem * insertPoint, DropRelation dr )
-{
- TQByteArray data = event->encodedData( "qt/listviewitem" );
- TQListViewItem* itemParent = insertPoint ? insertPoint->parent() : 0;
-
- // Change from sibling (default) to child creation
- if ( insertPoint && dr == Child ) {
- itemParent = insertPoint;
- insertPoint = 0;
- }
-
- if ( data.size() ) {
- event->accept();
- TQDataStream stream( data, IO_ReadOnly );
-
- int count = 0;
- stream >> count;
-
- for( int i = 0; i < count; i++ ) {
- if ( itemParent ) {
- insertPoint = new TQListViewItem( itemParent, insertPoint );
- itemParent->setOpen( TRUE );
- } else { // No parent for insertPoint, use TQListView
- insertPoint = new TQListViewItem( parent, insertPoint );
- }
- stream >> *insertPoint;
- }
- return TRUE;
- }
- return FALSE;
-}
-
-
-TQDataStream & operator<< ( TQDataStream & stream, const TQListViewItem & item )
-{
- int columns = item.listView()->columns();
- stream << columns;
-
- TQ_UINT8 b = 0;
-
- int i;
- for ( i = 0; i < columns; i++ ) {
- b = (TQ_UINT8) ( item.text( i ) != TQString() ); // does column i have a string ?
- stream << b;
- if ( b ) {
- stream << item.text( i );
- }
- }
-
- for ( i = 0; i < columns; i++ ) {
- b = (TQ_UINT8) ( !!item.pixmap( i ) ); // does column i have a pixmap ?
- stream << b;
- if ( b ) {
- stream << ( *item.pixmap( i ) );
- }
- }
-
- stream << (TQ_UINT8) item.isOpen();
- stream << (TQ_UINT8) item.isSelectable();
- stream << (TQ_UINT8) item.isExpandable();
- stream << (TQ_UINT8) item.dragEnabled();
- stream << (TQ_UINT8) item.dropEnabled();
- stream << (TQ_UINT8) item.isVisible();
-
- for ( i = 0; i < columns; i++ ) {
- stream << (TQ_UINT8) item.renameEnabled( i );
- }
-
- stream << (TQ_UINT8) item.multiLinesEnabled();
- stream << item.childCount();
-
- if ( item.childCount() > 0 ) {
- TQListViewItem * child = item.firstChild();
- while ( child ) {
- stream << ( *child ); // recursive call
- child = child->nextSibling();
- }
- }
-
- return stream;
-}
-
-TQDataStream & operator>> ( TQDataStream & stream, TQListViewItem & item )
-{
- TQ_INT32 columns;
- stream >> columns;
-
- TQ_UINT8 b = 0;
-
- TQString text;
- int i;
- for ( i = 0; i < columns; i++ ) {
- stream >> b;
- if ( b ) { // column i has string ?
- stream >> text;
- item.setText( i, text );
- }
- }
-
- TQPixmap pixmap;
- for ( i = 0; i < columns; i++ ) {
- stream >> b; // column i has pixmap ?
- if ( b ) {
- stream >> pixmap;
- item.setPixmap( i, pixmap );
- }
- }
-
- stream >> b;
- item.setOpen( b );
-
- stream >> b;
- item.setSelectable( b );
-
- stream >> b;
- item.setExpandable( b );
-
- stream >> b;
- item.setDragEnabled( b );
-
- stream >> b;
- item.setDropEnabled( b );
-
- stream >> b;
- item.setVisible( b );
-
- for ( i = 0; i < columns; i++ ) {
- stream >> b;
- item.setRenameEnabled( i, b );
- }
-
- stream >> b;
- item.setMultiLinesEnabled( b );
-
- int childCount;
- stream >> childCount;
-
- TQListViewItem *child = 0;
- TQListViewItem *prevchild = 0;
- for ( i = 0; i < childCount; i++ ) {
- child = new TQListViewItem( &item, prevchild );
- stream >> ( *child );
- item.insertItem( child );
- prevchild = child;
- }
-
- return stream;
-}
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