resizer.cpp

#include "resizer.hpp"

Resizer::Resizer(QGraphicsItem *crop, Position pos) : position(pos),
    anchored(false), pressed(false)
{
    ColorBase.setRgb(0,0,255);
    ColorAnchored.setRgb(0,180,0);
    ColorMousePressed.setRgb(255,0,0);
    setParentItem(crop);
    setFlag(ItemIsSelectable);
    setAcceptHoverEvents(true);
    setCursor(Qt::SizeAllCursor);
    updatePosition();
}

void Resizer::paint(QPainter *painter,
                    const QStyleOptionGraphicsItem *option,
                    QWidget *widget)
{
    QRectF rect = boundingRect();
    QBrush brush(ColorBase);
    QPen pen(QColor(0,0,0,0));

    if(pressed)
        brush.setColor(ColorMousePressed);
    else
    {
        if(anchored)
            brush.setColor(ColorAnchored);
        else
            brush.setColor(ColorBase);
    }

    painter-> setRenderHint (QPainter:: Antialiasing);
    painter->setPen(pen);
    painter->fillRect(rect, brush);
    painter->drawRect(rect);
}

QRectF Resizer::boundingRect() const
{
    return QRectF(0, 0, width, height);
}

void Resizer::mousePressEvent(QGraphicsSceneMouseEvent *event)
{
    pressed = true;
    update();
    QGraphicsItem::mousePressEvent(event);
}

void Resizer::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
{
    pressed = false;
    update();
    QGraphicsItem::mouseReleaseEvent(event);
}

void Resizer::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
{
    qreal dx = event->pos().x() - event->lastPos().x();
    qreal dy = event->pos().y() - event->lastPos().y();

    if(position == LEFT || position == RIGHT)
        moveBy(dx, 0);
    else
        moveBy(0, dy);

    update();
    emit sizeChanged(dx, dy, position);
    QGraphicsItem::mouseMoveEvent(event);
}

void Resizer::updatePosition()
{
    QGraphicsItem *crop = parentItem();
    qreal x, y;
    switch(position)
    {
    parentItem();
      case RIGHT:
        width  = 4;
        height = crop->boundingRect().height();
        x = crop->boundingRect().width()/2;
        y = -crop->boundingRect().height()/2;
        break;

       case LEFT:
        width  = 4;
        height = crop->boundingRect().height();
        x = -width-crop->boundingRect().width()/2;
        y = -crop->boundingRect().height()/2;
        break;

    case UPPER:
        width  = crop->boundingRect().width();
        height = 4;
        x = -crop->boundingRect().width()/2;
        y = -height-crop->boundingRect().height()/2;
        break;

    case BOTTOM:
        width  = crop->boundingRect().width();
        height = 4;
        x = -crop->boundingRect().width()/2;
        y = crop->boundingRect().height()/2;
    }
    setPos(x, y);
}