QFD2/QFD/CCanvas/CSchemeView.cpp

#include "CSchemeView.h"

#include "CSchemeItem.h"
#include "CRectItem.h"
#include "CLineItem.h"
#include "CTextItem.h"

#include <QGraphicsItem>

#include <QDebug>

CSchemeView::CSchemeView(QWidget *parent) : QGraphicsView(new QGraphicsScene(), parent)
{
    setRenderHints(QPainter::Antialiasing);  // 抗锯齿

    m_group = new QGraphicsItemGroup();
    m_group->setFlags(QGraphicsItem::ItemIsMovable);

    scene()->addItem(m_group);

    setStyleSheet("QGraphicsView {border: 1px solid rgba(0, 0, 0, 0.073);background: rgb(244, 244, "
                  "255);}");
}

void CSchemeView::addItem(CSchemeItem *item)
{
    m_schemes.append(item);
    refreshItems();
}

void CSchemeView::clear()
{
    qDeleteAll(m_schemes);
    m_schemes.clear();
    refreshItems();
}

void CSchemeView::refreshItems()
{
    for (QGraphicsItem *item : m_items) {
        scene()->removeItem(item);
    }
    m_items.clear();
    refreshItemsGeometry();
    for (QGraphicsItem *item : m_items) {
        m_group->addToGroup(item);
    }
    QRectF r = m_group->childrenBoundingRect();
    setSceneRect(QRectF(QPointF(), r.size()));
}

qreal CSchemeView::maxItemHeight() const
{
    qreal h = 0;
    for (CSchemeItem *item : m_schemes) {
        h = std::max(h, item->borderHeight());
    }
    return h;
}

void CSchemeView::refreshItemsGeometry()
{
    qreal mh          = maxItemHeight();
    int x             = 0;
    CSchemeItem *left = nullptr;
    for (CSchemeItem *item : m_schemes) {
        QRect borderRect = QRect(x, (mh - item->borderHeight()) / 2, item->borderWidth(), item->borderHeight());
        item->rectItem()->setRect(borderRect);

        QPointF textPos = QPointF(borderRect.left() + (item->borderWidth() - item->textWidth()) / 2,
                                  borderRect.top() + (item->borderHeight() - item->textHeight()) / 2);
        item->textItem()->setPos(textPos);
        item->rectItem()->setPos(QPoint(0, 0));

        if (left != nullptr) {
            item->lineItem()->setStartPos(left->rectItem()->centerRight());
            item->lineItem()->setEndPos(item->rectItem()->centerLeft());
        }

        m_items.append(item->rectItem());

        x += borderRect.width() + m_hNodeSpace;
        left = item;
    }
}