wordpress同步 說說seo搜索引擎優(yōu)化5
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2026/01/24 06:45:27
wordpress同步 說說,seo搜索引擎優(yōu)化5,計算機前端和后端哪個好就業(yè),入侵織夢網(wǎng)站鼠標事件
在Qt中#xff0c;鼠標事件主要包括以下幾種#xff1a;
鼠標按下事件#xff0c;當用戶按下鼠標按鍵時觸發(fā)鼠標釋放事件#xff0c;當用戶松開鼠標按鍵時觸發(fā)鼠標單擊事件#xff0c;按下和釋放鼠標按鍵時觸發(fā)鼠標雙擊事件#xff0c;用戶在短時間內(nèi)連續(xù)單擊兩…鼠標事件在Qt中鼠標事件主要包括以下幾種鼠標按下事件當用戶按下鼠標按鍵時觸發(fā)鼠標釋放事件當用戶松開鼠標按鍵時觸發(fā)鼠標單擊事件按下和釋放鼠標按鍵時觸發(fā)鼠標雙擊事件用戶在短時間內(nèi)連續(xù)單擊兩次鼠標按鍵時觸發(fā)鼠標移動事件當鼠標指針在窗口或控件內(nèi)部移動時觸發(fā)鼠標滾輪事件用戶滾動鼠標滾輪時觸發(fā)鼠標懸停事件當鼠標停留在控件上方一段時間觸發(fā)這些函數(shù)名都是內(nèi)置的重寫就不用寫槽函數(shù)和發(fā)送信號代碼如下這里有兩個窗口小控件的被大的擋住了myLabel.h#ifndefMYLABEL_H#defineMYLABEL_H#includeQWidget#includeQLabelclassmyLabel:publicQLabel{public:// 顯式構造函數(shù)explicitmyLabel(QWidget*parent0);// 定義鼠標按下事件觸發(fā)函數(shù)voidmousePressEvent(QMouseEvent*ev);// 定義鼠標移動事件觸發(fā)函數(shù)voidmouseMoveEvent(QMouseEvent*ev);// 定義鼠標釋放事件觸發(fā)函數(shù)voidmouseReleaseEvent(QMouseEvent*ev);// 雙擊事件雙擊時候會觸發(fā)單擊voidmouseDoubleClickEvent(QMouseEvent*ev);// 滾輪事件voidwheelEvent(QWheelEvent*ev);// 鼠標進入控件區(qū)域voidenterEvent(QEnterEvent*ev);// 鼠標離開控件區(qū)域voidleaveEvent(QEvent*ev);private:QWidget*QLabel;};#endif// MYLABEL_HmyLabel.cpp#includemylabel.h#includeQMouseEvent#includeQWidgetmyLabel::myLabel(QWidget*parent):QLabel(parent){}voidmyLabel::mousePressEvent(QMouseEvent*ev){// 判斷鼠標按下的是左鍵還是右鍵if(ev-button()Qt::LeftButton){QString strQString::fromLocal8Bit(鼠標左鍵按下(%1,%2)).arg(QString::number(ev-x()),QString::number(ev-y()));this-setText(str);}else{QString strQString::fromLocal8Bit(鼠標右鍵按下(%1,%2)).arg(QString::number(ev-x()),QString::number(ev-y()));this-setText(str);}}voidmyLabel::mouseMoveEvent(QMouseEvent*ev){// 開啟這個實施捕捉setMouseTracking(true);QString strQString::fromLocal8Bit(鼠標移動(%1,%2)).arg(QString::number(ev-x()),QString::number(ev-y()));this-setText(str);}voidmyLabel::mouseReleaseEvent(QMouseEvent*ev){this-setText(QString::fromLocal8Bit(鼠標松開));}voidmyLabel::mouseDoubleClickEvent(QMouseEvent*ev){QString strQString::fromLocal8Bit(觸發(fā)雙擊(%1, %2)).arg(QString::number(ev-x()),QString::number(ev-y()));this-setText(str);// 改變一下樣式看是否成功this-setStyleSheet(background-color: #ffcccc; font-size: 20px; border: 2px solid blue;);}voidmyLabel::wheelEvent(QWheelEvent*ev){// angleDalta().y() 0 表示向前滾遠離客戶intdeltaev-angleDelta().y();QString directiondelta0?QString::fromLocal8Bit(向前滾“放大”):QString::fromLocal8Bit(向后滾“縮小”);QString strQString::fromLocal8Bit(滾輪滑動數(shù)值 %1 - %2).arg(delta).arg(direction);this-setText(str);}voidmyLabel::enterEvent(QEnterEvent*ev){this-setStyleSheet(background-color: lightblue; font-size: 20px; border: 2px solid blue);this-setText(QString::fromLocal8Bit(鼠標已進入?yún)^(qū)域));}voidmyLabel::leaveEvent(QEvent*ev){this-setStyleSheet(background-color: lightgray; font-size: 20px; border: 2px solid black);this-setText(QString::fromLocal8Bit(鼠標已離開));}widget.cpp#includewidget.h#includeui_widget.h#includemylabel.hWidget::Widget(QWidget*parent):QWidget(parent),ui(newUi::Widget){ui-setupUi(this);this-setWindowTitle(QString::fromLocal8Bit(鼠標事件));myLabel*labelnewmyLabel(this);label-setText(QString::fromLocal8Bit(初始狀態(tài)));label-setFixedSize(400,400);label-setAlignment(Qt::AlignCenter);label-setStyleSheet(QLabel{border:1px solid red;});label-show();}Widget::~Widget(){deleteui;}