#include "picscene.h"
#include <QDebug>
#include <QRectF>
#include <QPainter>
#include <QGraphicsView>
PicScene::PicScene(QObject *parent) :
    QGraphicsScene(parent),IsdrawBackground(false)
{
}

void PicScene::setMode(Mode mode)
{
    myMode = mode;
}

void PicScene::mousePressEvent(QGraphicsSceneMouseEvent *mouseEvent)
{
    if (mouseEvent->button() != Qt::LeftButton)
        return;

    QGraphicsScene::mousePressEvent(mouseEvent);
}

//! [9]

//! [10]
void PicScene::mouseMoveEvent(QGraphicsSceneMouseEvent *mouseEvent)
{
    update();//edit@12-12
    QGraphicsScene::mouseMoveEvent(mouseEvent);
}
//! [10]

//! [11]
void PicScene::mouseReleaseEvent(QGraphicsSceneMouseEvent *mouseEvent)
{
    QGraphicsScene::mouseReleaseEvent(mouseEvent);
}
//! [13]

//! [14]
bool PicScene::isItemChange(int type)
{
    foreach (QGraphicsItem *item, selectedItems()) {
        if (item->type() == type)
            return true;
    }
    return false;
}
//! [14]

void PicScene::keyPressEvent(QKeyEvent *event)
{
    QGraphicsScene::keyPressEvent(event);
}
//edit@12-09
void PicScene::drawBackground(QPainter *painter, const QRectF &rect)
{
    QGraphicsScene::drawBackground(painter,rect);

    if(IsdrawBackground)
    {
        Q_UNUSED(rect);
        QPen pen;

        const qreal left=rect.left();
        const qreal right=rect.right();
        const qreal top=rect.top();
        const qreal bottom=rect.bottom();

        const int step=1;
        //pen.setColor(QColor(60,60,60));
        pen.setColor(Qt::lightGray);
        //pen.setColor(Qt::darkCyan);
        pen.setWidth(0);
        //pen.setStyle(Qt::DashLine);
        painter->setPen(pen);
        //绘制横线
        //绘制Y轴正半轴
        for(int i=0;i>=top;i-=step)
        {
            painter->drawLine(left,i,right,i);
        }

        //绘制Y轴负半轴
        for(int i=0;i<=bottom;i+=step)
        {
            painter->drawLine(left,i,right,i);
        }

        //绘制竖线
        //绘制X轴正半轴
        for(int i=0;i<=right;i+=step)
        {
            painter->drawLine(i,top,i,bottom);
        }
        //绘制X轴负半轴
        for(int i=0;i>=left;i-=step)
        {
            painter->drawLine(i,top,i,bottom);
        }

        //edit@12-11
        pen.setColor(Qt::green);
        painter->setPen(pen);
        QRectF BoundingRect=this->itemsBoundingRect();
        BoundingRect.setHeight(32);
        painter->drawRect(BoundingRect);
    }

    emit showTextWidthHeight();
}
//edit@12-09
void PicScene::setIsdrawBackground(bool newIsdrawBackground)
{
    IsdrawBackground = newIsdrawBackground;
}