Using QTimer and mouseMoveEvent

[ChrisW67]

I would be inclined to make the QLabels look after their own highlighting when the mouse is over them.

#include <QApplication>
#include <QWidget>
#include <QVBoxLayout>
#include <QLabel>
#include <QPixmap>
#include <QGraphicsDropShadowEffect>
 
class Label: public QLabel
{
    Q_OBJECT
public:
    Label(QWidget *p = 0): QLabel(p) 
    {
        QPixmap pixmap(200, 200);
        pixmap.fill(QColor("mediumseagreen"));
        setPixmap(pixmap);
        setFrameStyle(QFrame::Box);
 
        QGraphicsDropShadowEffect *shadow = new QGraphicsDropShadowEffect(this);
        shadow->setBlurRadius(10);
        shadow->setColor(QColor("orchid"));
        setGraphicsEffect(shadow);
    }
protected:
    void enterEvent(QEvent *event)
    {
        QGraphicsDropShadowEffect *shadow = new QGraphicsDropShadowEffect(this);
        shadow->setBlurRadius(10);
        shadow->setColor(QColor("lightsalmon"));
        setGraphicsEffect(shadow);
    }
    void leaveEvent(QEvent *event)
    {
        QGraphicsDropShadowEffect *shadow = new QGraphicsDropShadowEffect(this);
        shadow->setBlurRadius(10);
        shadow->setColor(QColor("orchid"));
        setGraphicsEffect(shadow);
    }
};
 
class Widget: public QWidget
{
    Q_OBJECT
public:
    Widget(QWidget *p = 0): QWidget(p)
    {
        QVBoxLayout *layout = new QVBoxLayout(this);
        layout->addWidget(new Label);
        layout->addWidget(new Label);
    }
};
 
int main(int argc, char **argv)
{
    QApplication app(argc, argv);
    Widget w;
    w.show();
    return app.exec();
}
#include "main.moc"

#include <QApplication>
#include <QWidget>
#include <QVBoxLayout>
#include <QLabel>
#include <QPixmap>
#include <QGraphicsDropShadowEffect>

class Label: public QLabel
{
    Q_OBJECT
public:
    Label(QWidget *p = 0): QLabel(p) 
    {
        QPixmap pixmap(200, 200);
        pixmap.fill(QColor("mediumseagreen"));
        setPixmap(pixmap);
        setFrameStyle(QFrame::Box);

        QGraphicsDropShadowEffect *shadow = new QGraphicsDropShadowEffect(this);
        shadow->setBlurRadius(10);
        shadow->setColor(QColor("orchid"));
        setGraphicsEffect(shadow);
    }
protected:
    void enterEvent(QEvent *event)
    {
        QGraphicsDropShadowEffect *shadow = new QGraphicsDropShadowEffect(this);
        shadow->setBlurRadius(10);
        shadow->setColor(QColor("lightsalmon"));
        setGraphicsEffect(shadow);
    }
    void leaveEvent(QEvent *event)
    {
        QGraphicsDropShadowEffect *shadow = new QGraphicsDropShadowEffect(this);
        shadow->setBlurRadius(10);
        shadow->setColor(QColor("orchid"));
        setGraphicsEffect(shadow);
    }
};

class Widget: public QWidget
{
    Q_OBJECT
public:
    Widget(QWidget *p = 0): QWidget(p)
    {
        QVBoxLayout *layout = new QVBoxLayout(this);
        layout->addWidget(new Label);
        layout->addWidget(new Label);
    }
};

int main(int argc, char **argv)
{
    QApplication app(argc, argv);
    Widget w;
    w.show();
    return app.exec();
}
#include "main.moc"

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