[英]Trouble Connecting QPushButton Signal to QGraphicsView Slot
我在將QPushButton
的信號連接到QGraphicsView
的插槽時遇到問題。
我的按鈕標題:
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
宏才能使用插槽進行編譯,但是當我進行編譯時,我會不斷得到未找到的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
當我取出宏時,可以很好地進行編譯,但是在運行時,我總是收到此錯誤:
Object::connect: No such signal QPushButton::updated() in implementation/game_controller.cpp:11
我的game_controller
擴展了QGRaphicsView
,這是我嘗試連接Button的代碼:
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()));
任何幫助將不勝感激
保留Q_OBJECT,moc需要它
不要寫信號的主體,moc會為所有信號生成代碼。
不處理mousePressedEvent,處理在QAbstractButton及其所有子類上可用的clicked()信號
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