我们先获取当前坐标,通过event->x(),event->y获得; 接着需要判断坐标是否在棋盘范围内:x >= startX && x <= startX+8*gridX && y >= startY && y <= startX+8*gridY; 接着算出x和y的坐标:chessX = (x - startX) / gridX; chessY = (y - startY) / gridY; 然后进行绘制:p.drawPixmap...
bool myLabel::event(QEvent *e){//如果是鼠标按下 在event事件分发中做拦截操作if(e->type() == QEvent::MouseButtonPress){QMouseEvent * ev = static_cast<QMouseEvent *>(e);QString str = QString("Event函数中:鼠标按下了 x=%1 y=%2 globalX = %3 globalY = %4").arg(ev->x())...
void EventLabel::mouseMoveEvent(QMouseEvent *event) { this->setText(QString("Move: (%1, %2) ").arg(QString::number(event->x()), QString::number(event->y())); } void EventLabel::mousePressEvent(QMouseEvent *event) { this->setText(QString("Press...
void enterEvent(QEvent *); void leaveEvent(QEvent *); void mousePressEvent(QMouseEvent *); void mouseReleaseEvent(QMouseEvent *); void mouseMoveEvent(QMouseEvent *); void paintEvent(QPaintEvent *); void drawCircle(QPainter *painter, int radius, const QBrush &brush); void drawArc(QPainter...
static int relea_x; //鼠标释放时的位置 static int relea_y; QMouseEvent *event = static_cast<QMouseEvent *>(evn); //将之转换为鼠标事件 if(event->type()==QEvent::MouseButtonPress) //如果鼠标按下 { press_x = event->globalX(); ...
尽管添加closeEvent( QCloseEvent * event )这一功能函数之后,窗口会在关闭时给出提示对话框。但有时候还会发生这样一种情况:在点击确认关闭后,还会再会出现一个对话框,即提示对话框会出现两次。那这又是什么原因呢?其实很简单,那是因为closeEvent( QCloseEvent * event )只会响应close的操作,出现两次对话框无疑是...
在Qt源代码之外,有两种方法可以截获并处理XEvent。其实在事件循环过程中的QEventDispatcherX11::processEvents函数中,存在两个级别的事件处理和过滤过程,第一个就是QApplication::x11EventFilter,可以通过重新实现此函数,截获所有的XEvent;第二个是QWidget::x11Event函数,通过重新实现此函数,发送到该widget的XEvent将首先...
MouseEvent *event) { QPoint y = event->globalPos();//鼠标相当于桌面左上角的位置,鼠标全局位置 QPoint x = y - this->z; this->move(x); } void Widget::mousePressEvent(QMouseEvent *event) { QPoint y = event->globalPos();//鼠标相当于桌面左上角的位置,鼠标全局位置 QPoint x ...
//添加函数：void Widget::mouseReleaseEvent(QMouseEvent *event){ m_dragging = 0;} //mousemove改为：void Widget::mouseMoveEvent(QMouseEvent *event){ if (m_dragging==1){ a=event->pos().x();b=event->pos().y();update();} } ...