我在将QPushButton
中的信号连接到QGraphicsView
中的插槽时遇到问题。
我的按钮标题:
class Button : public QPushButton {
Q_OBJECT
public://public constructors / destructors
Button(Game_state * game_state, QWidget *parent = 0);
~Button();
protected://signals / slots etc QT
void mousePressEvent(QMouseEvent * event);//
signals:
void updated() { std::cout << "HELLO FROM THE UPDATED METHOD" << std::endl;}
protected:
Game_state * game_state;//this is the global gamestate method
char * action_name;//this is the application name that is responsible for setting the game_state so the game controller knows what to delete / update
};
您需要
Q_Object
宏才能使用插槽对其进行编译,但是当我进行编译时,我会不断得到未找到的vtable引用,如下所示:Undefined symbols for architecture x86_64:
"vtable for Button", referenced from:
Button::~Button()in buttons.o
Button::~Button()in buttons.o
Button::~Button()in buttons.o
Button::Button(Game_state*, QWidget*)in buttons.o
Button::Button(Game_state*, QWidget*)in buttons.o
当我取出宏时,可以很好地进行编译,但是在运行时,我总是收到此错误:
Object::connect: No such signal QPushButton::updated() in implementation/game_controller.cpp:11
我的
game_controller
扩展了QGRaphicsView
,这是我尝试连接Button的代码:this->button = new Button(game_state);
this->proxy = new QGraphicsProxyWidget();
this->proxy = this->scene->addWidget(this->button);
connect(this->button, SIGNAL(updated()), this, SLOT(update()));
任何帮助将不胜感激
最佳答案
保留Q_OBJECT,moc需要它
不要写信号的主体,moc会为所有信号生成代码。
不处理mousePressedEvent,处理在QAbstractButton及其所有子类上可用的clicked()信号
关于c++ - 将QPushButton信号连接到QGraphicsView插槽时出现问题,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/13653622/