editor/customgraphics.cpp

#include "customgraphics.h"
#include <QPainter>
#include <QGraphicsSceneMouseEvent>
#include <QMenu>
#include <QGraphicsScene>

// HmiComponent 基类实现

HmiComponent::HmiComponent(QGraphicsItem *parent) : QGraphicsObject(parent)
{
    setFlag(QGraphicsItem::ItemIsMovable, true);
    setFlag(QGraphicsItem::ItemIsSelectable, true);
    setAcceptHoverEvents(true);
}

void HmiComponent::setColor(const QColor& color) {
    if (m_color != color) {
        m_color = color;
        update();
    }
}

QColor HmiComponent::color() const {
    return m_color;
}

void HmiComponent::setComponentName(const QString& name) {
    m_componentName = name;
}

QString HmiComponent::componentName() const {
    return m_componentName;
}

void HmiComponent::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
{
    Q_UNUSED(option);
    Q_UNUSED(widget);
    painter->setRenderHint(QPainter::Antialiasing);

    paintShape(painter);

    if (isSelected()) {
        painter->setBrush(Qt::NoBrush);
        painter->setPen(QPen(Qt::darkRed, 2, Qt::DashLine));
        painter->drawRect(boundingRect());
    }
}

void HmiComponent::mousePressEvent(QGraphicsSceneMouseEvent *event)
{
    // 右键不触发选中信号，留给 contextMenuEvent 处理
    if (event->button() == Qt::LeftButton) {
        emit selected(this);
    }
    QGraphicsObject::mousePressEvent(event);
}

// 实现 contextMenuEvent
void HmiComponent::contextMenuEvent(QGraphicsSceneContextMenuEvent *event)
{
    // 右键点击时，先清空场景中的其他选中项，然后选中当前项
    scene()->clearSelection();
    setSelected(true);
    emit selected(this); // 同样可以发出选中信号，以便更新属性面板等

    QMenu menu;
    QAction *copyAction = menu.addAction("复制");
    QAction *deleteAction = menu.addAction("删除");

    // 使用 connect 将菜单动作的触发连接到信号的发射,“复制”和“删除”
    connect(copyAction, &QAction::triggered, this, [this]() {
        emit copyRequested(this);
    });
    connect(deleteAction, &QAction::triggered, this, [this]() {
        emit deleteRequested(this);
    });

    // 在鼠标光标位置显示菜单
    menu.exec(event->screenPos());
}


// HmiButton 类实现

HmiButton::HmiButton(QGraphicsItem *parent) : HmiComponent(parent) {
    m_color = Qt::gray;
    m_componentName = "Button";
}

QRectF HmiButton::boundingRect() const {
    return QRectF(0, 0, 80, 30);
}

void HmiButton::paintShape(QPainter *painter) {
    painter->setPen(Qt::NoPen);
    painter->setBrush(m_color);
    painter->drawRect(boundingRect());
}


// HmiIndicator 类实现

HmiIndicator::HmiIndicator(QGraphicsItem *parent) : HmiComponent(parent) {
    m_color = Qt::green;
    m_componentName = "Indicator";
}

QRectF HmiIndicator::boundingRect() const {
    return QRectF(0, 0, 30, 30);
}

void HmiIndicator::paintShape(QPainter *painter) {
    painter->setPen(Qt::NoPen);
    painter->setBrush(m_color);
    painter->drawEllipse(boundingRect());
}