qt 鼠标点击事件

大概就这几种，

按左键右键

void QtWidgetsApplication7::mousePressEvent(QMouseEvent *event)
{
	//如果是鼠标左键按下
	if (event->button() == Qt::LeftButton) {
		QCursor cursor;
		cursor.setShape(Qt::ClosedHandCursor);
		QApplication::setOverrideCursor(cursor);
		offset = event->globalPos() - pos();
	}
	else if (event->button() == Qt::RightButton) {
		QCursor cursor(QPixmap(":/res/mouse.png"));
		QApplication::setOverrideCursor(cursor);
	}
}

释放事件

void QtWidgetsApplication7::mouseReleaseEvent(QMouseEvent *event)
{
	//释放事件
	QApplication::restoreOverrideCursor();
}

双击事件

void QtWidgetsApplication7::mouseDoubleClickEvent(QMouseEvent *event)
{
	if (event->button() == Qt::LeftButton) {
		if (windowState() != Qt::WindowFullScreen) {
			setWindowState(Qt::WindowFullScreen);
		}
		else {
			setWindowState(Qt::WindowNoState);
		}
	}
}

鼠标移动事件

void QtWidgetsApplication7::mouseMoveEvent(QMouseEvent *event)
{
	//移动过程中判断鼠标是左键点击并且移动，那么要用buttons，返回的是鼠标状态的集合
	if (event->buttons() & Qt::LeftButton) {
		//获取窗口应当移动到的位置
		QPoint windowpos = event->globalPos() - offset;
		this->move(windowpos);
	}
}

滚轮事件

void QtWidgetsApplication7::wheelEvent(QWheelEvent *event)
{
	//鼠标滚动远离使用者放大textedit
	if (event->delta() > 0) {
		qDebug() << "catch wheel event delta > 0" << endl;
		ui.textEdit->zoomIn();
	}
	else {
		qDebug() << "catch wheel event delta < 0" << endl;
		ui.textEdit->zoomOut();
	}
}