#include "graphicsItem/functionModelItem/graphicsFunctionModelItem.h"

GraphicsFunctionModelItem::GraphicsFunctionModelItem(QGraphicsItem *parent)
    : GraphicsProjectModelItem(parent)
{

}

GraphicsProjectModelItem::~GraphicsProjectModelItem()
{
}

void GraphicsProjectModelItem::paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget)
{
    Q_UNUSED(option)
    Q_UNUSED(widget)
}


/********************************功能模item组*************************************/

GraphicsFunctionModelGroup::GraphicsFunctionModelGroup(QGraphicsItem *parent)
    :GraphicsFunctionModelItem(parent)
{

}

GraphicsFunctionModelGroup::~GraphicsFunctionModelGroup()
{

}

void GraphicsFunctionModelGroup::addItem(GraphicsFunctionModelItem* item)
{
    item->setParentItem(this); // 关键：设置父项
    m_childItems.append(item);
    updateLayout();
}

QRectF GraphicsFunctionModelGroup::updateBoundRect()
{
    QRectF rect;
    if(m_childItems.size()){
        for (auto* child : m_childItems) {
            rect |= child->boundingRect().translated(child->pos());
        }

        m_boundingRect = rect;
    }
    else
    {
        return m_boundingRect;
    }

    updateHandles();
    return rect;
}

void GraphicsFunctionModelGroup::updateLayout()
{
    if (m_childItems.isEmpty()) return;

    // 计算所有子项的总尺寸
    qreal totalSize = 0;
    QList<qreal> childSizes;

    for (GraphicsBaseItem *child : m_childItems) {
        QRectF childRect = child->boundingRect();
        qreal size = (m_direction == 0) ? childRect.width() : childRect.height();
        childSizes.append(size);
        totalSize += size;
    }

    // 计算总间距
    qreal totalSpacing = m_spacing * (m_childItems.size() - 1);

    // 计算起始位置（相对于父项中心）
    qreal startPos = -(totalSize + totalSpacing) / 2;

    // 定位每个子项
    qreal currentPos = startPos;
    for (int i = 0; i < m_childItems.size(); ++i) {
        GraphicsBaseItem *child = m_childItems[i];
        QRectF childRect = child->boundingRect();

        if (m_direction == 0) {
            // 水平布局：x坐标变化，y坐标保持中心对齐
            child->setPos(currentPos, -childRect.height() / 2);
            currentPos += childSizes[i] + m_spacing;
        } else {
            // 垂直布局：y坐标变化，x坐标保持中心对齐
            child->setPos(-childRect.width() / 2, currentPos);
            currentPos += childSizes[i] + m_spacing;
        }
    }
    updateBoundRect();
}