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#include <QtGui>

#include "diagramtextitem.h"
#include "diagramscene.h"

DiagramTextItem::DiagramTextItem(QGraphicsItem *parent, QGraphicsScene *scene,
                 bool editable, DiagramItem *ownerItem, unsigned char styleIO,
                 unsigned char ID, QString defaultText, QPointF offset)
    : QGraphicsTextItem(parent, scene)
{
    myOwnerItem = ownerItem;
    myStyleIO = styleIO;
    myID=ID;
    editableItem=editable;    
    if(myOwnerItem==0)
        setZValue(1000.0);
    else
        setZValue(myOwnerItem->zValue());

    setPlainText(defaultText);
    posOffset=offset;

    if(editable)
    {
        if (myOwnerItem==0)
            setFlag(QGraphicsItem::ItemIsMovable);
        setFlag(QGraphicsItem::ItemIsSelectable);
    }
    else
        setFlag(QGraphicsItem::ItemIsFocusable,0);

        updatePosition();
}

void DiagramTextItem::updatePosition()
{
        QPointF myOwnerPos;


        if(myOwnerItem!=0)
        {
            setZValue(myOwnerItem->zValue());
            myOwnerPos= myOwnerItem->pos();
        }
        else
        {
            setZValue(1000.0);
            myOwnerPos=pos();
        }

        if(myStyleIO==0)
            setPos(myOwnerPos+posOffset+QPointF(-boundingRect().width()/2,
                                                -boundingRect().height()/2));
        else if(myStyleIO & 0b10000000)
            setPos(myOwnerPos+posOffset+QPointF(0,-boundingRect().height()/2));
        else                                //OUT
            setPos(myOwnerPos+posOffset+QPointF(-boundingRect().width(),
                                                -boundingRect().height()/2));
}

QVariant DiagramTextItem::itemChange(GraphicsItemChange change,
                     const QVariant &value)
{
    if (change == QGraphicsItem::ItemSelectedHasChanged)
        emit selectedChange(this);

    return value;
}

void DiagramTextItem::focusOutEvent(QFocusEvent *event)
{
    if(editableItem)
    {
        if(toPlainText()=="") setPlainText("?");
        if(myOwnerItem!=0) updatePosition();
        setTextInteractionFlags(Qt::NoTextInteraction);
        emit lostFocus(this);
        QGraphicsTextItem::focusOutEvent(event);
    }
}

void DiagramTextItem::mouseDoubleClickEvent(QGraphicsSceneMouseEvent *event)
{
    if(editableItem)
    {        
        if (textInteractionFlags() == Qt::NoTextInteraction)
            setTextInteractionFlags(Qt::TextEditorInteraction);        
        QGraphicsTextItem::mouseDoubleClickEvent(event);
    }
}

void DiagramTextItem::mousePressEvent(QGraphicsSceneMouseEvent *event)
{
        if (myOwnerItem!=0)
        {
            setSelected(0);
            myOwnerItem->mousePressEvent(event);
        }
        else
            QGraphicsTextItem::mousePressEvent(event);
}

void DiagramTextItem::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
{
        if (myOwnerItem!=0)
        {
            myOwnerItem->mouseReleaseEvent(event);
        }
        else
            QGraphicsTextItem::mouseReleaseEvent(event);
}

void DiagramTextItem::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
{
        if (myOwnerItem!=0)
        {
            myOwnerItem->mouseMoveEvent(event);
        }
        else
            QGraphicsTextItem::mouseMoveEvent(event);
}