editor/button.cpp

#include "button.h"
#include <QPainter>
#include <QStyleOptionGraphicsItem>
#include <QGraphicsSceneMouseEvent>
#include <QMenu>
#include <QFileDialog>
#include <QCursor>

Button::Button(const QString &type) : Item(type)
{

}

QRectF Button::boundingRect() const
{
    return QRectF(0, 0, currentSize_.width(), currentSize_.height());
}

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

    if (type_ == "按钮") {
        if (!imagePath_.isEmpty() && !customPixmap_.isNull())
        {
            painter->drawPixmap(0, 0, currentSize_.width(), currentSize_.height(), customPixmap_);
        }
        else{
            painter->drawRect(0, 0, currentSize_.width(), currentSize_.height());
        }
    }
    if (!registerId_.isEmpty()) {
        painter->save();
        painter->setFont(QFont("Arial", 8));
        painter->setPen(Qt::red);
        QString text;
        if (registerValue_ > 0)
        {
            text = QString("%1\nON").arg(registerId());
        }
        else
        {
            text = QString("%1\nOFF").arg(registerId());
        }
        painter->drawText(QRectF(0, 0, currentSize_.width(), currentSize_.height()), Qt::AlignCenter, text);
        painter->restore();
    }
    if (option->state & QStyle::State_Selected) {
        QPen pen(Qt::DashLine);
        pen.setColor(Qt::blue);
        pen.setWidth(2);
        painter->setPen(pen);
        painter->setBrush(Qt::NoBrush);
        painter->drawRect(boundingRect());
    }
}

void Button::addMenuActions(QMenu *menu)
{
    menu->addAction("置ON");
    menu->addAction("置OFF");
    menu->addAction("外观设置");
}

void Button::handleMenuAction(QAction *action)
{
    if (action->text() == "复制") {
        emit requestCopy(this);
    }
    if (action->text() == "删除") {
        emit requestDelete(this);
    }
    if (action->text() == "对象"){
        emit requestBindRegister(this);
    }
    if (action->text() == "重置"){
        emit requestReset(this);
    }
    if (action->text() == "置ON"){
        emit requestSetON(this, true);
    }
    if (action->text() == "置OFF"){
        emit requestSetON(this, false);
    }
    if (action->text() == "外观设置"){
        QString fileName = QFileDialog::getOpenFileName(nullptr,
                                                        "选择图片",
                                                        "",
                                                        "图片文件(*.png *.jpg *.bmp)");
        if (!fileName.isEmpty())
        {
            setCustomImage(fileName);
        }
    }
}

void Button::setCustomImage(const QString &imagePath)
{
    imagePath_ = imagePath;
    loadImage();
    update();
}

void Button::setCurrentSize(QSizeF size)
{
    currentSize_ = size;
}

QSizeF Button::currentSize()
{
    return currentSize_;
}

QString Button::imagePath()
{
    return imagePath_;
}

void Button::loadImage()
{
    if(!imagePath_.isEmpty()){
        customPixmap_ = QPixmap(imagePath_);
//        if (!customPixmap_.isNull()){
//            customPixmap_ = customPixmap_.scaled(50, 50, Qt::KeepAspectRatio, Qt::SmoothTransformation);
//        }
    }
}

void Button::mousePressEvent(QGraphicsSceneMouseEvent *event)
{
    // 检查是否点击了调整手柄
    QRectF resizeHandle = QRectF(currentSize_.width() - resizeHandleSize_,
                                 currentSize_.height() - resizeHandleSize_,
                                 resizeHandleSize_, resizeHandleSize_);
    if (resizeHandle.contains(event->pos())) {
        resizing_ = true;
        resizeStartPos_ = event->scenePos();
        originalSize_ = currentSize_; // 当前大小
        event->accept();
    } else {
        // 否则调用基类处理（移动等）
        QGraphicsObject::mousePressEvent(event);
    }
}

void Button::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
{
    if (resizing_) {
        // 计算新的尺寸
        QPointF delta = event->scenePos() - resizeStartPos_;
        qreal newWidth = originalSize_.width() + delta.x();
        qreal newHeight = originalSize_.height() + delta.y();

        // 限制最小尺寸
        if (newWidth < 20) newWidth = 20;
        if (newHeight < 20) newHeight = 20;

        // 更新当前尺寸
        currentSize_ = QSizeF(newWidth, newHeight);

        // 准备几何变化
        prepareGeometryChange();
        update(); // 更新显示
        event->accept();
    } else {
        QGraphicsObject::mouseMoveEvent(event);
    }
}

void Button::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
{
    if (resizing_) {
        resizing_ = false;
        event->accept();
    } else {
        QGraphicsObject::mouseReleaseEvent(event);
    }
}