Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.

BUG:215923


git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdevelop@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 432 insertions, 0 deletions

diff --git a/kdevdesigner/designer/listviewdnd.cpp b/kdevdesigner/designer/listviewdnd.cpp
new file mode 100644
index 00000000..b4098237
--- /dev/null
+++ b/kdevdesigner/designer/listviewdnd.cpp
@@ -0,0 +1,432 @@
+/**********************************************************************
+** 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 "listviewdnd.h"
+#include <qwidget.h>
+#include <qheader.h>
+#include <qpainter.h>
+#include <qdragobject.h>
+#include <qvaluelist.h>
+
+// The Dragobject Declaration ---------------------------------------
+class ListViewItemDrag : public QStoredDrag
+{
+public:
+    enum DropRelation { Sibling, Child };
+    ListViewItemDrag( ListViewItemList & items, QWidget * parent = 0, const char * name = 0 );
+    ~ListViewItemDrag() {};
+    static bool canDecode( QDragMoveEvent * event );
+    static bool decode( QDropEvent * event, QListView * parent, QListViewItem * insertPoint, DropRelation dr );
+};
+// ------------------------------------------------------------------
+
+ListViewDnd::ListViewDnd( QListView * eventSource, const char * name )
+    : ListDnd( eventSource, name ) { }
+
+void ListViewDnd::confirmDrop( QListViewItem * )
+{
+    dropConfirmed = TRUE;
+}
+
+bool ListViewDnd::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();
+
+	ListViewItemDrag::DropRelation dr = ListViewItemDrag::Sibling;
+	QListViewItem *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, (QListView *) src, item, dr ) ) {
+	    event->accept();
+	    emit dropped( 0 ); // Use ID instead of item?
+	}
+    }
+
+    line->hide();
+    dragInside = FALSE;
+
+    return TRUE;
+}
+
+bool ListViewDnd::mouseMoveEvent( QMouseEvent * event )
+{
+    if ( event->state() & LeftButton ) {
+	if ( ( event->pos() - mousePressPos ).manhattanLength() > 3 ) {
+	    ListViewItemList list;
+
+	    if ( dMode & Flat )
+		buildFlatList( list );
+	    else
+		buildTreeList( list );
+
+	    ListViewItemDrag * dragobject = new ListViewItemDrag( list, (QListView *) 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;
+    QListViewItem *nextSibling = 0;
+    QListViewItem *nextParent = 0;
+    QListViewItemIterator it = ((QListView *)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 )
+{
+    QListViewItemIterator it = ((QListView *)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 QPoint & dragPos )
+{
+    QListViewItem * item = itemAt(dragPos);
+    QListView * src = (QListView *) 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 );
+}
+
+QListViewItem * ListViewDnd::itemAt( QPoint pos )
+{
+    QListView * src = (QListView *) this->src;
+    int headerHeight = (int)(src->header()->height());
+    pos.ry() -= headerHeight;
+    QListViewItem * 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( QListViewItem * item, QPoint pos )
+{
+    if ( !item || (dMode & Flat) )
+	return 0;
+
+    int result     = 0;
+    int itemDepth  = item->depth();
+    int indentSize = ((QListView *)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( QDragEnterEvent * event )
+{
+    return ListViewItemDrag::canDecode( event );
+}
+
+// ------------------------------------------------------------------
+// The Dragobject Implementation ------------------------------------
+// ------------------------------------------------------------------
+
+QDataStream & operator<< ( QDataStream & stream, const QListViewItem & item );
+QDataStream & operator>> ( QDataStream & stream, QListViewItem & item );
+
+ListViewItemDrag::ListViewItemDrag( ListViewItemList & items, QWidget * parent, const char * name )
+    : QStoredDrag( "qt/listviewitem", parent, name )
+{
+    // ### FIX!
+    QByteArray data( sizeof( Q_INT32 ) + sizeof( QListViewItem ) * items.count() );
+    QDataStream stream( data, IO_WriteOnly );
+
+    stream << items.count();
+
+    QListViewItem *i = items.first();
+    while ( i ) {
+        stream << *i;
+	i = items.next();
+    }
+
+    setEncodedData( data );
+}
+
+bool ListViewItemDrag::canDecode( QDragMoveEvent * event )
+{
+    return event->provides( "qt/listviewitem" );
+}
+
+bool ListViewItemDrag::decode( QDropEvent * event, QListView * parent, QListViewItem * insertPoint, DropRelation dr )
+{
+    QByteArray data = event->encodedData( "qt/listviewitem" );
+    QListViewItem* 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();
+	QDataStream stream( data, IO_ReadOnly );
+
+	int count = 0;
+	stream >> count;
+
+	for( int i = 0; i < count; i++ ) {
+	    if ( itemParent ) {
+		insertPoint = new QListViewItem( itemParent, insertPoint );
+		itemParent->setOpen( TRUE );
+	    } else { // No parent for insertPoint, use QListView
+		insertPoint = new QListViewItem( parent, insertPoint );
+	    }
+	    stream >> *insertPoint;
+	}
+	return TRUE;
+    }
+    return FALSE;
+}
+
+
+QDataStream & operator<< ( QDataStream & stream, const QListViewItem & item )
+{
+    int columns = item.listView()->columns();
+    stream << columns;
+ 
+    Q_UINT8 b = 0;
+
+    int i;
+    for ( i = 0; i < columns; i++ ) {
+	b = (Q_UINT8) ( item.text( i ) != QString::null ); // does column i have a string ?
+	stream << b;
+	if ( b ) {
+	    stream << item.text( i );
+	}
+    }
+    
+    for ( i = 0; i < columns; i++ ) {
+	b = (Q_UINT8) ( !!item.pixmap( i ) ); // does column i have a pixmap ?
+	stream << b;
+	if ( b ) {
+	    stream << ( *item.pixmap( i ) );
+	}
+    }
+
+    stream << (Q_UINT8) item.isOpen();
+    stream << (Q_UINT8) item.isSelectable();
+    stream << (Q_UINT8) item.isExpandable();
+    stream << (Q_UINT8) item.dragEnabled();
+    stream << (Q_UINT8) item.dropEnabled();
+    stream << (Q_UINT8) item.isVisible();
+
+    for ( i = 0; i < columns; i++ ) {
+	stream << (Q_UINT8) item.renameEnabled( i );
+    }
+
+    stream << (Q_UINT8) item.multiLinesEnabled();
+    stream << item.childCount();
+
+    if ( item.childCount() > 0 ) {
+	QListViewItem * child = item.firstChild();
+	while ( child ) {
+	    stream << ( *child ); // recursive call
+	    child = child->nextSibling();
+	}
+    }
+
+    return stream;
+}
+    
+QDataStream & operator>> ( QDataStream & stream, QListViewItem & item )
+{
+    Q_INT32 columns;
+    stream >> columns;
+
+    Q_UINT8 b = 0;
+
+    QString text;
+    int i;
+    for ( i = 0; i < columns; i++ ) {
+	stream >> b;
+	if ( b ) { // column i has string ?
+	    stream >> text;
+	    item.setText( i, text );
+	}
+    }
+
+    QPixmap 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;
+
+    QListViewItem *child = 0;
+    QListViewItem *prevchild = 0;
+    for ( i = 0; i < childCount; i++ ) {
+	child = new QListViewItem( &item, prevchild );
+	stream >> ( *child );
+	item.insertItem( child );
+	prevchild = child;
+    }
+
+    return stream;
+}