我编写了自己的自定义QPushbutton
类来捕获悬停事件。问题是,当我尝试显示自定义按钮时,它没有显示,但是捕获悬停事件就可以了(它可以打印到控制台),并且QPushButton
也出现在表单上。同样,当我杀死bool event(QEvent *)
功能按钮时,它也会像预期的那样显示在屏幕上。
SButton.h
#include <QPushButton>
#include <QEvent>
#include <QObject>
class SButton : public QPushButton {
Q_OBJECT
public:
SButton(QWidget *parent = nullptr) : QPushButton(parent) {}
SButton(const QString &text, QWidget *parent = nullptr): QPushButton(text, parent){}
SButton(const QIcon& icon, const QString &text, QWidget *parent = nullptr) : QPushButton(icon, text, parent){}
signals:
void HoverIn();
void HoverOut();
protected:
bool event(QEvent *event);
private:
QWidget* p;
};
MainWindow.cpp
MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent)
, ui(new Ui::MainWindow)
{
ui->setupUi(this);
QWidget *MainWidget=new QWidget();
this->setCentralWidget(MainWidget);
QHBoxLayout *layoutAdd=new QHBoxLayout();
QPushButton *bSelect=new QPushButton("Select group or company"); //this one does just fine
SButton *bAdd=new SButton("Add new group or company", MainWidget); //this one makes the problem
layoutAdd->addWidget(bSelect);
layoutAdd->addWidget(bAdd);
bAdd->show();
MainWidget->setLayout(layoutAdd);
MainWidget->show();
connect(bAdd, &SButton::HoverIn, bAdd, []() {QTextStream(stdout) << "got there at least" << "\n";});
SButton.cpp:
#include <SButtons.h>
#include <QTextStream>
bool SButton::event(QEvent *event) {
switch(event->type()) {
case QEvent::Enter:
emit HoverIn();
QTextStream(stdout) << "Enter" << "\n";
return true;
break;
case QEvent::Leave:
emit HoverOut();
QTextStream(stdout) << "Leave" << "\n";
return true;
break;
default:
return false;
break;
}
return QPushButton::event(event);
}
答案 0 :(得分:0)
编辑:如前所述,您将忽略所有事件并返回false:
[i for j in df1.values.tolist() for i in j]
相反,这样做:
default:
return false;
break;
}
return QPushButton::event(event); // this line is never reached
您可能会忽略
default:
break;
}
return QPushButton::event(event);
//OR
default:
return QPushButton::event(event);
类的bool event(QEvent *event);
中的事件。试试这个:
SButton
请注意,bool SButton::event(QEvent* event)
{
if (event->type() == QEvent::HoverEnter) {
emit HoverIn();
}
// Other events...
return QPushButton::event(event);
}
之后的break
只是噪音:
return