QT实现双击标题栏最大化的代码

爱被打了一巴掌 2022-12-06 05:47 278阅读 0赞

1.使用事件过滤器实现

bool QUIWidget::eventFilter(QObject *watched, QEvent *event)
    {
        static QPoint mousePoint;
        static bool mousePressed = false;
    
        QMouseEvent *mouseEvent = static_cast<QMouseEvent *>(event);
        if (mouseEvent->type() == QEvent::MouseButtonPress) {
            if (mouseEvent->button() == Qt::LeftButton) {
                mousePressed = true;
                mousePoint = mouseEvent->globalPos() - this->pos();
            }
        } else if (mouseEvent->type() == QEvent::MouseButtonRelease) {
            mousePressed = false;
        } else if (mouseEvent->type() == QEvent::MouseMove) {
            if (mousePressed && (mouseEvent->buttons() && Qt::LeftButton)) {
                if (this->property("canMove").toBool()) {
                    this->move(mouseEvent->globalPos() - mousePoint);
                }
            }
        } else if (mouseEvent->type() == QEvent::MouseButtonDblClick) {
            //以下写法可以将双击识别限定在标题栏
            if (this->btnMenu_Max->isVisible() && watched == this->widgetTitle) {
                //if (this->btnMenu_Max->isVisible()) {
                this->on_btnMenu_Max_clicked();
            }
        }
    
        return QWidget::eventFilter(watched, event);
    }

看最后一段:

(mouseEvent->type() == QEvent::MouseButtonDblClick) {
            //下面可以写自己的代码
            //以下写法可以将双击识别限定在标题栏
            if (this->btnMenu_Max->isVisible() && watched == this->widgetTitle) {
                //if (this->btnMenu_Max->isVisible()) {
                this->on_btnMenu_Max_clicked();
            }
        }

2.安装过滤器

this->widgetTitle->installEventFilter(this);