nifdelegate.cpp

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Copyright (c) 2005-2012, NIF File Format Library and Tools
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#include "nifmodel.h"
#include "nifproxy.h"
#include "kfmmodel.h"

#include <QItemDelegate>

#include "spellbook.h"

#include "widgets/valueedit.h"
#include "widgets/nifcheckboxlist.h"

#include <QComboBox>
#include <QLineEdit>
#include <QMouseEvent>
#include <QPainter>
#include <QListView>

#include "options.h"

extern void qt_format_text(const QFont& font, const QRectF &_r,
                           int tf, const QString& str, QRectF *brect,
                           int tabstops, int* tabarray, int tabarraylen,
                           QPainter* painter);

class NifDelegate : public QItemDelegate
{
	SpellBook * book;
public:
	NifDelegate( SpellBook * sb = 0) : QItemDelegate(), book( sb ) {}
	
	virtual bool editorEvent( QEvent * event, QAbstractItemModel * model, const QStyleOptionViewItem & option, const QModelIndex & index )
	{
		Q_ASSERT( event );
		Q_ASSERT( model );
		
		switch ( event->type() )
		{
			case QEvent::MouseButtonPress:
			case QEvent::MouseButtonRelease:
				if ( static_cast<QMouseEvent*>(event)->button() == Qt::LeftButton 
					&& decoRect( option ).contains( static_cast<QMouseEvent*>(event)->pos() ) )
				{
					Spell * spell = SpellBook::lookup( model->data( index, Qt::UserRole ).toString() );
					if ( spell && ! spell->icon().isNull() )
					{
						if ( event->type() == QEvent::MouseButtonRelease )
						{
							NifModel * nif = 0;
							QModelIndex buddy = index;
							
							if ( model->inherits( "NifModel" ) )
							{
								nif = static_cast<NifModel *>( model );
							}
							else if ( model->inherits( "NifProxyModel" ) )
							{
								NifProxyModel * proxy = static_cast<NifProxyModel*>( model );
								nif = static_cast<NifModel *>( proxy->model() );
								buddy = proxy->mapTo( index );
							}
							
							if ( nif && spell->isApplicable( nif, buddy ) )
							{
								if ( book )
									book->cast( nif, buddy, spell );
								else
									spell->cast( nif, buddy );
							}
						}
						return true;
					}
				}	break;
			case QEvent::MouseButtonDblClick:
				if ( static_cast<QMouseEvent*>(event)->button() == Qt::LeftButton )
				{
					QVariant v = model->data( index, Qt::EditRole );
					if ( v.canConvert<NifValue>() )
					{
						NifValue nv = v.value<NifValue>();
						if ( nv.type() == NifValue::tBool )
						{
							nv.set<int>( ! nv.get<int>() );
							model->setData( index, nv.toVariant(), Qt::EditRole );
							return true;
						}
					}
				}	break;
			default:
				break;
		}
		return false;
	}
	
	virtual void paint( QPainter * painter, const QStyleOptionViewItem & option, const QModelIndex & index ) const
	{
		int namerole = NifSkopeDisplayRole;
		namerole = (index.isValid() && index.column() == 0) ?
 			Qt::DisplayRole : NifSkopeDisplayRole;
		
		QString text = index.data( namerole ).toString();
		QString deco = index.data( Qt::DecorationRole ).toString();
		
		QString user = index.data( Qt::UserRole ).toString();
		QIcon icon;
		if ( ! user.isEmpty() )
		{
			Spell * spell = SpellBook::lookup( user );
			if ( spell ) icon = spell->icon();
		}
		
		QStyleOptionViewItem opt = option;
		
		QRect tRect = opt.rect;
		QRect dRect;
		
		if ( ! icon.isNull() || ! deco.isEmpty() )
		{
			dRect = decoRect( opt );
			tRect = textRect( opt );
		}
		
		opt.state |= QStyle::State_Active;
		QPalette::ColorGroup cg = opt.state & QStyle::State_Enabled ? QPalette::Normal : QPalette::Disabled;
		
		QVariant color = index.data( Qt::BackgroundColorRole );
		if ( color.canConvert<QColor>() )
			painter->fillRect( option.rect, color.value<QColor>() );
		else if ( option.state & QStyle::State_Selected )
			painter->fillRect( option.rect, option.palette.brush( cg, QPalette::Highlight ) );
		
		painter->save();
		painter->setPen( opt.palette.color( cg, opt.state & QStyle::State_Selected ? QPalette::HighlightedText : QPalette::Text ) );
		painter->setFont( opt.font );
		
		if ( ! icon.isNull() )
			icon.paint( painter, dRect );
		else if ( ! deco.isEmpty() )
			painter->drawText( dRect, opt.decorationAlignment, deco );
		
		if ( ! text.isEmpty() )
		{
			drawDisplay( painter, opt, tRect, text );
			drawFocus( painter, opt, tRect );
		}
		
		painter->restore();
	}

	QSize sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const
	{
		QString text = index.data( NifSkopeDisplayRole ).toString();
		QRect textRect( 0, 0, option.fontMetrics.width(text), option.fontMetrics.lineSpacing() * (text.count(QLatin1Char('\n')) + 1) );
		return textRect.size();
	}

	QWidget * createEditor( QWidget * parent, const QStyleOptionViewItem &, const QModelIndex & index ) const
	{
		if ( ! index.isValid() )
			return 0;
		
		QVariant v = index.data( Qt::EditRole );
		QWidget * w = 0;
		
		if ( v.canConvert<NifValue>() )
		{
			NifValue nv = v.value<NifValue>();
			if ( nv.isCount() && index.column() == NifModel::ValueCol )
			{
				NifValue::EnumType type = NifValue::enumType( index.sibling( index.row(), NifModel::TypeCol ).data( NifSkopeDisplayRole ).toString() );
				if ( type == NifValue::eFlags) {
					w = new NifCheckBoxList( parent );
				} else if ( type == NifValue::eDefault) {
					QComboBox * c = new QComboBox( parent );
					w = c;
					c->setEditable( true );
				}
			}
			if ( w == NULL && ValueEdit::canEdit( nv.type() ) )
				w = new ValueEdit( parent );
		}
		else if ( v.type() == QVariant::String )
		{
			QLineEdit *le = new QLineEdit(parent);
			le->setFrame(false);
			w = le;
		}
		if ( w ) w->installEventFilter( const_cast<NifDelegate *>( this ) );
		return w;
	}
	
	void setEditorData(QWidget *editor, const QModelIndex &index) const
	{
		ValueEdit * vedit = qobject_cast<ValueEdit*>( editor );
		QComboBox * cedit = qobject_cast<QComboBox*>( editor );
		QLineEdit * ledit = qobject_cast<QLineEdit*>( editor );
		QVariant	v = index.data( Qt::EditRole );
		
		if ( vedit && v.canConvert<NifValue>() )
		{
			vedit->setValue( v.value<NifValue>() );
		}
		else if ( cedit && v.canConvert<NifValue>() && v.value<NifValue>().isCount() )
		{
			cedit->clear();
			QString t = index.sibling( index.row(), NifModel::TypeCol ).data( NifSkopeDisplayRole ).toString();
			const NifValue::EnumOptions& eo = NifValue::enumOptionData( t );
			quint32 value = v.value<NifValue>().toCount();
			QHashIterator< quint32, QPair< QString, QString > > it( eo.o );
			while ( it.hasNext() )
			{
				it.next();
				bool ok = false;
				if (eo.t == NifValue::eFlags) {
					cedit->addItem(it.value().first, ok = (value & (1 << it.key())) );
				} else {
					cedit->addItem(it.value().first, ok = (value == it.key()) );
				}
			}
			cedit->setEditText( NifValue::enumOptionName(t, value) );
			cedit->setCurrentIndex( cedit->findText( NifValue::enumOptionName( t, value ) ) );
		}
		else if ( ledit )
		{
			ledit->setText( v.toString() );
		}
	}
	
	void setModelData(QWidget *editor, QAbstractItemModel *model, const QModelIndex &index) const
	{
		Q_ASSERT(model);
		ValueEdit * vedit = qobject_cast<ValueEdit*>( editor );
		QComboBox * cedit = qobject_cast<QComboBox*>( editor );
		QLineEdit * ledit = qobject_cast<QLineEdit*>( editor );
		QVariant v;
		if ( vedit )
		{
			v.setValue( vedit->getValue() );
			model->setData( index, v, Qt::EditRole );
		}
		else if ( cedit )
		{
			QString t = index.sibling( index.row(), NifModel::TypeCol ).data( NifSkopeDisplayRole ).toString();
			QVariant v = index.data( Qt::EditRole );
			bool ok;
			quint32 x = NifValue::enumOptionValue( t, cedit->currentText(), &ok );
			if ( ! ok )
				x = cedit->currentText().toUInt();
			if ( v.canConvert<NifValue>() )
			{
				NifValue nv = v.value<NifValue>();
				nv.setCount( x );
				v.setValue( nv );
				model->setData( index, v, Qt::EditRole );
			}
		}
		else if ( ledit )
		{
			v.setValue( ledit->text() );
			model->setData( index, v, Qt::EditRole );
		}
	}

	QRect decoRect( const QStyleOptionViewItem & opt ) const
	{
		// allways upper left
		return QRect( opt.rect.topLeft(), opt.decorationSize );
	}
	
	QRect textRect( const QStyleOptionViewItem & opt ) const
	{
		return QRect( QPoint( opt.rect.x() + opt.decorationSize.width(), opt.rect.y() ), QSize( opt.rect.width() - opt.decorationSize.width(), opt.rect.height() ) );
	}
	
};

QAbstractItemDelegate * NifModel::createDelegate( SpellBook * book )
{
	return new NifDelegate( book );
}

QAbstractItemDelegate * KfmModel::createDelegate()
{
	return new NifDelegate;
}