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我想创建一个自定义文本项，当被选中时，它的边框变为绿色，并且它的文本可以像setTextInteractionFlags(Qt::TextEditorInteraction);在QGraphicsTextItem类中一样更改，但我想继承QGraphicsItem类并实现类似的东西。我的问题是如何使用覆盖绘制方法在文本项中实现眨眼文本光标？或者换句话说，这种情况的最佳解决方案是什么？

TextItem.h：

#include "QGraphicsTextItem"
#include "QKeyEvent"
#include "QRectF"

class TextItem : public QGraphicsItem {
public :
    TextItem(int x, int y);

    QRectF boundingRect() const override;

protected:
    void keyPressEvent(QKeyEvent *event) override;

public:
    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) override;

    ~TextItem();

private:
    QColor color;
    int x, y, width, height;
    QString text;

    void onSelectItem(QPainter *pPainter);
};

和TextItem.cpp：

#include <iostream>
#include "TextItem.h"
#include "QPainter"
#include "QTextItem"
#include "QKeyEvent"
#include "QStaticText"
#include "QStyleOptionGraphicsItem"

using namespace std;

TextItem::~TextItem() noexcept {}

TextItem::TextItem(int x, int y) : x(x),
                                   y(y),
                                   width(60),
                                   height(60),
                                   text(),
                                   color(Qt::black) {
    this->setFlags(ItemIsSelectable | ItemIsFocusable);
}


void TextItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) {
    if (this->isSelected()) {
        onSelectItem(painter);
// I think it should be draw here
//        setTextEditor(painter);
    }
    painter->save();
    painter->setRenderHint(QPainter::TextAntialiasing);
    QPen pen(Qt::black);
    painter->setPen(pen);
    painter->setBrush(color);
    painter->drawText(this->boundingRect(), text == "" ? "hello world" : text, QTextOption(Qt::AlignLeft));
    painter->restore();
}

void TextItem::keyPressEvent(QKeyEvent *event) {
    if (this->isSelected()) {
        text += event->text();
        this->update();
    }
    QGraphicsItem::keyPressEvent(event);
}

void TextItem::onSelectItem(QPainter *painter) {
    painter->save();
    QPen pen(Qt::green);
    pen.setJoinStyle(Qt::MiterJoin);
    pen.setWidth(2);
    painter->setPen(pen);
    painter->drawRect(this->boundingRect());
    painter->restore();
}

QRectF TextItem::boundingRect() const {
    return QRectF(x, y, width, height);
}

我希望我已经正确地表达了我的意思。

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