Qt鼠标悬停+悬浮窗口

Qt鼠标悬停+悬浮窗口

• 新建一个C++类：mouseHover
• 新建一个Qt界面类：QRImage
• 主界面
• 效果

这两个功能，有很多办法可以实现，这里记一下笔者常用的。

新建一个C++类：mouseHover

mouseHover.h

#ifndef MOUSEHOVER_H
#define MOUSEHOVER_H#include class mouseHover : public QObject
{Q_OBJECT
public:mouseHover();
signals:void signal_sendBtnObj(QObject*, QString);
protected:bool eventFilter(QObject *obj, QEvent *event) override;
};#endif // MOUSEHOVER_H

mouseHover.cpp

#include "mousehover.h"
#include 
#include 
mouseHover::mouseHover()
{}bool mouseHover::eventFilter(QObject *obj, QEvent *event)
{if (event->type() == QEvent::Enter){//鼠标进入控件emit signal_sendBtnObj(obj, obj->objectName());return true;}else if (event->type() == QEvent::Leave){//鼠标离开控件emit signal_sendBtnObj(obj, "mouse out");return true;}else{return  QObject::eventFilter(obj, event);}
}

新建一个Qt界面类：QRImage

QRImage.h

#ifndef QRIMAGE_H
#define QRIMAGE_H#include namespace Ui {
class QRImage;
}class QRImage : public QWidget
{Q_OBJECTpublic:explicit QRImage(QWidget *parent = nullptr);~QRImage();
public slots:void slots_showQR(QString);private:Ui::QRImage *ui;
};#endif // QRIMAGE_H

QRImage.cpp

#include "qrimage.h"
#include "ui_qrimage.h"
#include QRImage::QRImage(QWidget *parent) :QWidget(parent),ui(new Ui::QRImage)
{ui->setupUi(this);setWindowFlags(Qt::FramelessWindowHint);//无边框
}QRImage::~QRImage()
{delete ui;
}void QRImage::slots_showQR(QString mes)
{if (mes == "quit")this->close();else if (mes == "BAIDU")ui->label->setText("www.baidu.com");
}

主界面

MainWindow.h

#include "mousehover.h"
#include "qrimage.h"QLabel *label_mes;//一个标签QStatusBar *qstBar;//状态栏QRImage *qr;//悬浮窗口
signals:void signal_showQR(QString);
public slots:void slot_BtnObj(QObject*, QString);

MainWindow.cpp

/// 鼠标悬停
MainWindow::MainWindow(QWidget *parent): QMainWindow(parent), ui(new Ui::MainWindow)
{ui->setupUi(this);qr = new QRImage;//实例化connect(this, &MainWindow::signal_showQR, qr, &QRImage::slots_showQR);mouseHover *mmHover = new mouseHover();//实例化connect(mmHover, &mouseHover::signal_sendBtnObj, this, &MainWindow::slot_BtnObj);//连接信号槽//状态栏qstBar = this-->statusBar();label_mes = new QLabel("将鼠标移动到这里", this);label_mes->installEventFilter(mmHover);qstBar->addWidget(label_mes);//添加到状态栏左侧qstBar->addPermanentWidget(label_mes);//添加到状态栏右侧    void MainWindow::slot_BtnObj(QObject *objm QString objName)
{if (objName == "mouse out"){label_mes->setText("鼠标已离开");emit signal_showQR("quit");}else{if (objName == label_mes){label_mes->setText("鼠标已进入");qr->show();emit signal_showQR("BAIDU");}}
}
}

效果

本文来自互联网用户投稿，文章观点仅代表作者本人，不代表本站立场，不承担相关法律责任。如若转载，请注明出处。 如若内容造成侵权/违法违规/事实不符，请点击【内容举报】进行投诉反馈！