Linux 上的 QTouchEvent 代替 QMouseEvent

在Linux上使用QTouchEvent替代QMouseEvent的指南

cpp
    #include 
    

cpp
    bool YourWidget::eventFilter(QObject *obj, QEvent *event) {
        if (event->type() == QEvent::TouchBegin ||
            event->type() == QEvent::TouchUpdate ||
            event->type() == QEvent::TouchEnd) {
            QTouchEvent *touchEvent = static_cast(event);
            // 处理触摸事件的逻辑
            return true;
        } else {
            // 其他事件使用默认处理
            return QObject::eventFilter(obj, event);
        }
    }
    

cpp
    YourWidget::YourWidget(QWidget *parent) : QWidget(parent) {
        // 其他初始化...
        // 安装事件过滤器
        installEventFilter(this);
    }
    

cpp
#include 
#include 
#include 
#include 
class TouchWidget : public QWidget {
public:
    TouchWidget(QWidget *parent = nullptr) : QWidget(parent) {
        setAttribute(Qt::WA_AcceptTouchEvents);
    }
protected:
    void paintEvent(QPaintEvent *event) override {
        QPainter painter(this);
        painter.drawText(rect(), Qt::AlignCenter, "Touch me!");
    }
    bool event(QEvent *event) override {
        if (event->type() == QEvent::TouchBegin ||
            event->type() == QEvent::TouchUpdate ||
            event->type() == QEvent::TouchEnd) {
            QTouchEvent *touchEvent = static_cast(event);
            // 处理触摸事件的逻辑
            update(); // 重新绘制
            return true;
        } else {
            return QWidget::event(event);
        }
    }
};
int main(int argc, char *argv[]) {
    QApplication a(argc, argv);
    TouchWidget touchWidget;
    touchWidget.show();
    return a.exec();
}