die-bonder-ui/ImageWidget.h

#ifndef IMAGEWIDGET_H
#define IMAGEWIDGET_H

#include <QWidget>
#include <QStyleOption>
#include <QPainter>

namespace Ui {
class ImageWidget;
}

class ImageWidget : public QWidget
{
    Q_OBJECT

public:
    explicit ImageWidget(QWidget *parent = nullptr);
    ~ImageWidget();

    void setPixmap(const QPixmap& pixmap) {
        this->pixmap = pixmap;
        update(); // 触发重绘
    }

protected:
    void paintEvent(QPaintEvent* event) override {
        QPainter painter(this);
        if (!pixmap.isNull()) {
            // 获取窗口的中心点坐标
            int centerX = width() / 2;
            int centerY = height() / 2;

            // 计算pixmap的中心点坐标
            int pixmapCenterX = pixmap.width() / 2;
            int pixmapCenterY = pixmap.height() / 2;

            // 计算pixmap左上角的坐标，使其中心与窗口中心对齐
            int x = centerX - pixmapCenterX;
            int y = centerY - pixmapCenterY;

            // 在计算出的位置绘制 pixmap
            painter.drawPixmap(x, y, pixmap);
        }
    }

private:
    Ui::ImageWidget *ui;
    QPixmap pixmap;
};

#endif // IMAGEWIDGET_H