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306 lines
7.7 KiB
306 lines
7.7 KiB
/**********************************************************************
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** Copyright (C) 2002 Trolltech AS. All rights reserved.
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**
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** This file is part of TQt Designer.
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**
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** This file may be distributed and/or modified under the terms of the
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** GNU General Public License version 2 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file.
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**
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** Licensees holding valid TQt Enterprise Edition or TQt Professional Edition
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** licenses may use this file in accordance with the TQt Commercial License
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** Agreement provided with the Software.
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**
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** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
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** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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**
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** See http://www.trolltech.com/gpl/ for GPL licensing information.
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** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
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** information about TQt Commercial License Agreements.
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**
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** Contact info@trolltech.com if any conditions of this licensing are
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** not clear to you.
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**
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**********************************************************************/
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#include "listboxdnd.h"
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#include <tqwidget.h>
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#include <tqheader.h>
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#include <tqpainter.h>
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#include <tqdragobject.h>
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#include <tqvaluelist.h>
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// The Dragobject Declaration ---------------------------------------
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class ListBoxItemDrag : public TQStoredDrag
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{
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public:
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ListBoxItemDrag( ListBoxItemList & items, bool sendPtr = FALSE, TQListBox * parent = 0, const char * name = 0 );
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~ListBoxItemDrag() {};
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static bool canDecode( TQDragMoveEvent * event );
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static bool decode( TQDropEvent * event, TQListBox * parent, TQListBoxItem * insertPoint );
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enum ItemType { ListBoxText = 1, ListBoxPixmap = 2 };
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};
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// ------------------------------------------------------------------
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ListBoxDnd::ListBoxDnd( TQListBox * eventSource, const char * name )
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: ListDnd( eventSource, name ) { }
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void ListBoxDnd::confirmDrop( TQListBoxItem * )
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{
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dropConfirmed = TRUE;
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}
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bool ListBoxDnd::dropEvent( TQDropEvent * event )
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{
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if ( dragInside ) {
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if ( dMode & NullDrop ) { // combined with Move, a NullDrop will delete an item
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event->accept();
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emit dropped( 0 ); // a NullDrop
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return TRUE;
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}
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TQPoint pos = event->pos();
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TQListBoxItem * after = itemAt( pos );
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if ( ListBoxItemDrag::decode( event, (TQListBox *) src, after ) ) {
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event->accept();
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TQListBox * src = (TQListBox *) this->src;
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TQListBoxItem * item = ( after ? after->next() : src->firstItem() );
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src->setCurrentItem( item );
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emit dropped( item ); // ###FIX: Supports only one item!
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}
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}
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line->hide();
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dragInside = FALSE;
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return TRUE;
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}
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bool ListBoxDnd::mouseMoveEvent( TQMouseEvent * event )
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{
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if ( event->state() & Qt::LeftButton ) {
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if ( ( event->pos() - mousePressPos ).manhattanLength() > 3 ) {
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ListBoxItemList list;
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buildList( list );
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ListBoxItemDrag * dragobject = new ListBoxItemDrag( list, (dMode & Internal), (TQListBox *) src );
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// Emit signal for all dragged items
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TQListBoxItem * i = list.first();
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while ( i ) {
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emit dragged( i );
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i = list.next();
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}
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if ( dMode & Move ) {
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removeList( list ); // "hide" items
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}
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dragobject->dragCopy();
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if ( dMode & Move ) {
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if ( dropConfirmed ) {
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// ###FIX: memleak ? in internal mode, only pointers are transfered...
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//list.setAutoDelete( TRUE );
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list.clear();
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dropConfirmed = FALSE;
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}
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insertList( list ); // "show" items
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}
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}
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}
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return FALSE;
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}
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int ListBoxDnd::buildList( ListBoxItemList & list )
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{
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TQListBoxItem * i = ((TQListBox *)src)->firstItem();
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while ( i ) {
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if ( i->isSelected() ) {
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((TQListBox *)src)->setSelected( i, FALSE );
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list.append( i );
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}
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i = i->next();
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}
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return list.count();
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}
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void ListBoxDnd::insertList( ListBoxItemList & list )
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{
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TQListBoxItem * i = list.first();
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while ( i ) {
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((TQListBox *)src)->insertItem( i, i->prev() );
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i = list.next();
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}
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}
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void ListBoxDnd::removeList( ListBoxItemList & list )
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{
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TQListBoxItem * i = list.first();
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while ( i ) {
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((TQListBox *)src)->takeItem( i ); // remove item from TQListBox
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i = list.next();
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}
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}
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void ListBoxDnd::updateLine( const TQPoint & dragPos )
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{
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TQListBox * src = (TQListBox *) this->src;
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TQListBoxItem *item = itemAt( dragPos );
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int ypos = item ?
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( src->itemRect( item ).bottom() - ( line->height() / 2 ) ) :
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( src->itemRect( ((TQListBox *)src)->firstItem() ).top() );
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line->resize( src->viewport()->width(), line->height() );
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line->move( 0, ypos );
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}
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TQListBoxItem * ListBoxDnd::itemAt( TQPoint pos )
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{
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TQListBox * src = (TQListBox *) this->src;
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TQListBoxItem * result = src->itemAt( pos );
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TQListBoxItem * last = src->item( src->count() - 1 );
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int i = src->index( result );
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if ( result && ( pos.y() < (src->itemRect(result).top() + src->itemHeight(i)/2) ) )
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result = result->prev();
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else if ( !result && pos.y() > src->itemRect( last ).bottom() )
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result = last;
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return result;
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}
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bool ListBoxDnd::canDecode( TQDragEnterEvent * event )
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{
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return ListBoxItemDrag::canDecode( event );
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}
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// ------------------------------------------------------------------
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// The Dragobject Implementation ------------------------------------
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// ------------------------------------------------------------------
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ListBoxItemDrag::ListBoxItemDrag( ListBoxItemList & items, bool sendPtr, TQListBox * parent, const char * name )
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: TQStoredDrag( "qt/listboxitem", parent, name )
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{
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// ### FIX!
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TQByteArray data( sizeof( TQ_INT32 ) + sizeof( TQListBoxItem ) * items.count() );
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TQDataStream stream( data, IO_WriteOnly );
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stream << items.count();
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stream << (TQ_UINT8) sendPtr; // just transfer item pointer; omit data
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TQListBoxItem * i = items.first();
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if ( sendPtr ) {
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while ( i ) {
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stream << (TQ_ULONG) i; //###FIX: demands sizeof(ulong) >= sizeof(void*)
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i = items.next();
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}
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} else {
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while ( i ) {
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TQ_UINT8 b = 0;
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b = (TQ_UINT8) ( i->text() != TQString() ); // does item have text ?
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stream << b;
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if ( b ) {
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stream << i->text();
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}
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b = (TQ_UINT8) ( !!i->pixmap() ); // does item have a pixmap ?
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stream << b;
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if ( b ) {
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stream << ( *i->pixmap() );
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}
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stream << (TQ_UINT8) i->isSelectable();
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i = items.next();
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}
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}
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setEncodedData( data );
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}
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bool ListBoxItemDrag::canDecode( TQDragMoveEvent * event )
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{
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return event->provides( "qt/listboxitem" );
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}
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bool ListBoxItemDrag::decode( TQDropEvent * event, TQListBox * parent, TQListBoxItem * after )
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{
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TQByteArray data = event->encodedData( "qt/listboxitem" );
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if ( data.size() ) {
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event->accept();
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TQDataStream stream( data, IO_ReadOnly );
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int count = 0;
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stream >> count;
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TQ_UINT8 recievePtr = 0; // data contains just item pointers; no data
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stream >> recievePtr;
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TQListBoxItem * item = 0;
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if ( recievePtr ) {
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for( int i = 0; i < count; i++ ) {
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TQ_ULONG p = 0; //###FIX: demands sizeof(ulong) >= sizeof(void*)
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stream >> p;
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item = (TQListBoxItem *) p;
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parent->insertItem( item, after );
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}
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} else {
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for ( int i = 0; i < count; i++ ) {
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TQ_UINT8 hasText = 0;
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TQString text;
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stream >> hasText;
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if ( hasText ) {
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stream >> text;
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}
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TQ_UINT8 hasPixmap = 0;
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TQPixmap pixmap;
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stream >> hasPixmap;
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if ( hasPixmap ) {
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stream >> pixmap;
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}
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TQ_UINT8 isSelectable = 0;
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stream >> isSelectable;
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if ( hasPixmap ) {
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item = new TQListBoxPixmap( parent, pixmap, text, after );
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} else {
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item = new TQListBoxText( parent, text, after );
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}
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item->setSelectable( isSelectable );
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}
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}
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return TRUE;
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}
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return FALSE;
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}
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