QGraphicsItem如何实现simulink模块封装给出示例代码c++
时间: 2024-01-23 20:03:52 浏览: 92
好的,以下是一个简单的示例代码:
```c++
#include <QGraphicsItem>
#include <QPainter>
class SimulinkModule : public QGraphicsItem {
public:
SimulinkModule(QList<QString> inputs, QList<QString> outputs, QGraphicsItem *parent = nullptr)
: QGraphicsItem(parent), m_inputs(inputs), m_outputs(outputs) {
setFlag(ItemIsMovable);
}
QRectF boundingRect() const override {
return QRectF(0, 0, 100, 100);
}
void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) override {
Q_UNUSED(option)
Q_UNUSED(widget)
painter->setPen(QPen(Qt::black, 2));
painter->setBrush(Qt::white);
painter->drawRect(boundingRect());
QFont font("Arial", 10);
painter->setFont(font);
QRectF textRect(0, 0, 100, 20);
textRect.moveCenter(boundingRect().center());
painter->drawText(textRect, Qt::AlignCenter, "Simulink");
}
void addInput(QString name, int type) {
// 添加一个输入端口
// ...
}
void addOutput(QString name, int type) {
// 添加一个输出端口
// ...
}
void setParameter(QString name, QVariant value) {
// 设置模块的参数
// ...
}
QVariant getParameter(QString name) {
// 获取模块的参数
// ...
return QVariant();
}
QVariant evaluate(QList<QVariant> inputs) {
// 计算模块的输出
// ...
return QVariant();
}
private:
QList<QString> m_inputs;
QList<QString> m_outputs;
QMap<QString, QVariant> m_parameters;
};
```
这个简单的示例代码实现了一个名为"Simulink"的模块,包含一个边界矩形和一个文本标签。该模块可以被拖动,并提供了添加输入输出端口、设置参数、获取参数和计算输出的方法。这个示例代码可以作为一个基础框架,根据需要进行扩展和修改。
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