QObject Connection“不能从''Class中转换参数3,该类别继承了Qobject'到qObject*
我正在使用MVC模式,并且正在尝试将视图类的信号与继承qObject的控制器类连接起来
class View : public QWidget
{
Q_OBJECT
private:
Controller* controller;
QPushButton* startButton;
void addControls(QVBoxLayout* mainLayout);
public:
explicit View(QWidget *parent = nullptr);
void setController(Controller* c);
};
#endif // VIEW_H
是方法
void View::addControls(QVBoxLayout *mainLayout)
{
//I'm adding the button
}
View::View(QWidget *parent) : QWidget(parent)
{
//Layout
}
void View::setController(Controller *c){
controller = c;
connect(startButton, SIGNAL(clicked()), controller, SLOT(begin()));
//ERROR controller is a Controller* and it can't be converted it to const QObject*
}
,这是控制器类
class Controller : public QObject
{
Q_OBJECT
private:
QTimer* timer;
View* view;
Model* model;
public:
explicit Controller(QObject *parent = nullptr);
~Controller();
void setModel(Model* m);
void setView(View* v);
public slots:
void begin() const;
};
#endif // CONTROLLER_H
方法
Controller::Controller(QObject *parent):
QObject(parent), timer(new QTimer)
{
connect(timer, SIGNAL(timeout()), this, SLOT(next()));
}
Controller::~Controller() { delete timer; }
void Controller::setModel(Model* m) { model = m; }
void Controller::setView(View* v) { view = v; }
void Controller::begin() const {
timer->start(200);
}
,是良好的 每个组件。
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
View w;
Controller c;
Model m;
c.setModel(&m);
c.setView(&w);
w.setController(&c);
w.show();
return a.exec();
}
,这是我的主要位置。设置我尝试了我能想到的一切,无法使其起作用的
I'm using the MVC pattern and I'm trying to connect a signal from my view class with my controller class that inherits QObject
class View : public QWidget
{
Q_OBJECT
private:
Controller* controller;
QPushButton* startButton;
void addControls(QVBoxLayout* mainLayout);
public:
explicit View(QWidget *parent = nullptr);
void setController(Controller* c);
};
#endif // VIEW_H
This are the methods
void View::addControls(QVBoxLayout *mainLayout)
{
//I'm adding the button
}
View::View(QWidget *parent) : QWidget(parent)
{
//Layout
}
void View::setController(Controller *c){
controller = c;
connect(startButton, SIGNAL(clicked()), controller, SLOT(begin()));
//ERROR controller is a Controller* and it can't be converted it to const QObject*
}
And this is the Controller class
class Controller : public QObject
{
Q_OBJECT
private:
QTimer* timer;
View* view;
Model* model;
public:
explicit Controller(QObject *parent = nullptr);
~Controller();
void setModel(Model* m);
void setView(View* v);
public slots:
void begin() const;
};
#endif // CONTROLLER_H
And the methods
Controller::Controller(QObject *parent):
QObject(parent), timer(new QTimer)
{
connect(timer, SIGNAL(timeout()), this, SLOT(next()));
}
Controller::~Controller() { delete timer; }
void Controller::setModel(Model* m) { model = m; }
void Controller::setView(View* v) { view = v; }
void Controller::begin() const {
timer->start(200);
}
For good measure, here is the main where I set each component
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
View w;
Controller c;
Model m;
c.setModel(&m);
c.setView(&w);
w.setController(&c);
w.show();
return a.exec();
}
I've tried everything I could think of, can't make it work..
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停止使用可怕的基于文本的插槽连接接口。
使用带来不错的编译错误的现代案例:
Stop using the terrible text-based slot connection interface.
Use the modern one that gives nice compile errors: