TrainCamp_yanchaoyang_Two/untitled/hmieditor.cpp

#include "hmieditor.h"
#include <QPen>
#include <QBrush>

void Shape::draw(QPainter& painter) const {
    painter.setPen(QPen(Qt::blue, 2));
    painter.setBrush(QBrush(Qt::lightGray, Qt::DiagCrossPattern));

    if (type == Circle) {
        painter.drawEllipse(rect);
    } else if (type == Rectangle) {
        painter.drawRect(rect);
    }
}
HMIEditor::HMIEditor(QWidget *parent)
    : QWidget(parent), currentShapeType(Shape::Rectangle), isDrawing(false)
{
    setMinimumSize(400, 300);
    setStyleSheet("background-color: white;");
}

void HMIEditor::onDrawCircle() {
    currentShapeType = Shape::Circle;
}

void HMIEditor::onDrawRect() {
    currentShapeType = Shape::Rectangle;
}

void HMIEditor::paintEvent(QPaintEvent *event) {
    Q_UNUSED(event);
    QPainter painter(this);

    // 绘制所有已完成的图形
    for (const auto& shape : shapes) {
        shape.draw(painter);
    }

    // 绘制正在绘制的图形
    if (isDrawing) {
        painter.setPen(QPen(Qt::red, 2, Qt::DashLine));
        if (currentShapeType == Shape::Circle) {
            painter.drawEllipse(currentDrawingRect);
        } else {
            painter.drawRect(currentDrawingRect);
        }
    }
}

void HMIEditor::mousePressEvent(QMouseEvent *event) {
    if (event->button() == Qt::LeftButton) {
        isDrawing = true;
        currentDrawingRect.setTopLeft(event->pos());
        currentDrawingRect.setBottomRight(event->pos());
        update();
    }
}

void HMIEditor::mouseReleaseEvent(QMouseEvent *event) {
    if (event->button() == Qt::LeftButton && isDrawing) {
        isDrawing = false;
        currentDrawingRect.setBottomRight(event->pos());
        shapes.emplace_back(currentShapeType, currentDrawingRect);
        update();
    }
}

void HMIEditor::mouseMoveEvent(QMouseEvent *event) {
    if (isDrawing) {
        currentDrawingRect.setBottomRight(event->pos());
        update();
    }
}