Qt 自定义类的信号和插槽
我已经编写了一个自定义类来重写QSlider的seek方法。基本上,这个类允许在用户单击的滑块上进行搜索 tbslider.hQt 自定义类的信号和插槽,qt,signals-slots,qslider,Qt,Signals Slots,Qslider,我已经编写了一个自定义类来重写QSlider的seek方法。基本上,这个类允许在用户单击的滑块上进行搜索 tbslider.h #ifndef TBSLIDER_H #define TBSLIDER_H #include <QSlider> #include <QObject> class Tbslider: public QSlider { Q_OBJECT public: explicit Tbslider(QWidget *parent=0);
#ifndef TBSLIDER_H
#define TBSLIDER_H
#include <QSlider>
#include <QObject>
class Tbslider: public QSlider
{
Q_OBJECT
public:
explicit Tbslider(QWidget *parent=0);
signals:
void tbJump(int);
protected:
void mousePressEvent(QMouseEvent *event);
private:
QSlider *qslider;
};
#endif // TBSLIDER_H
上面的代码应该是有效的。还有什么我需要做的吗?函数应该是
void Tbslider::mousePressEvent(QMouseEvent *event)
{
std::cout<<"\nX co-ordinate"<<event->x();
std::cout<<"\nY co-ordinate"<<event->y();
int value =(minimum() + ((maximum()-minimum()) * event->x()) / width() ) ;
setValue(value);
emit tbJump(value);
QSlider::mousePressEvent(event);
}
void Tbslider::mousePressEvent(QMouseEvent*event)
{
std::要使您的组件尽可能与QSlider
兼容,请使用它的信号-您无需创建信号,请使用valueChanged(int-value)
。该信号已由setValue(int)
发出。我发出信号以调用另一个类的公共插槽。
QApplication app(argc, argv);
MainWindow player;
Tbslider tbslider;
GSTEngine listen
app.connect(&tbslider, SIGNAL(tbJump(int)), &listen, SLOT(jump(int)));
void Tbslider::mousePressEvent(QMouseEvent *event)
{
std::cout<<"\nX co-ordinate"<<event->x();
std::cout<<"\nY co-ordinate"<<event->y();
int value =(minimum() + ((maximum()-minimum()) * event->x()) / width() ) ;
setValue(value);
emit tbJump(value);
QSlider::mousePressEvent(event);
}