使用qss加载图片

#include "eventfilter.h" #include "ui_eventfilter.h" EventFilter::EventFilter(QWidget *parent, Qt::WindowFlags f) : QDialog(parent, f) { setWindowTitle(tr("事件过滤")); label1 = new QLabel; Image1.load(":/image/1.png"); label1->setAlignment(Qt::AlignHCenter|Qt::AlignVCenter); label1->setPixmap(QPixmap::fromImage(Image1)); label2 = new QLabel; Image2.load(":/image/2.png"); label2->setAlignment(Qt::AlignHCenter|Qt::AlignVCenter); label2->setPixmap(QPixmap::fromImage(Image2)); label3 = new QLabel; Image3.load(":/image/3.png"); label3->setAlignment(Qt::AlignHCenter|Qt::AlignVCenter); label3->setPixmap(QPixmap::fromImage(Image3)); stateLabel = new QLabel(tr("鼠标按下标志")); stateLabel->setAlignment(Qt::AlignHCenter); QHBoxLayout *layout = new QHBoxLayout; layout->addWidget(label1); layout->addWidget(label2); layout->addWidget(label3); QVBoxLayout *mainlayout = new QVBoxLayout(this); mainlayout->addLayout(layout); mainlayout->addWidget(stateLabel); label1->installEventFilter(this); label2->installEventFilter(this); label3->installEventFilter(this); } EventFilter::~EventFilter() { } bool EventFilter::eventFilter(QObject *watched, QEvent *event) { if (watched == label1) { if (event->type() == QEvent::MouseButtonPress) { QMouseEvent *mouseEvent = (QMouseEvent *)event; if (mouseEvent->buttons() & Qt::LeftButton) stateLabel->setText(tr("左键按下左边图片")); else if (mouseEvent->buttons() & Qt::MidButton) stateLabel->setText(tr("中键按下左边图片")); else if (mouseEvent->buttons() & Qt::RightButton) stateLabel->setText(tr("右键按下左边图片")); QMatrix matrix; matrix.scale(1.8, 1.8); QImage tmpImg = Image1.transformed(matrix); label1->setPixmap(QPixmap::fromImage(tmpImg)); } if (event->type() == QEvent::MouseButtonRelease) { stateLabel->setText(tr("鼠标释放左边图片")); label1->setPixmap(QPixmap::fromImage(Image1)); } } else if (watched == label2) { if (event->type() == QEvent::MouseButtonPress) { QMouseEvent *mouseEvent = (QMouseEvent *)event; if (mouseEvent->buttons() &Qt::LeftButton) stateLabel->setText(tr("左键按下中间图片")); else if (mouseEvent->buttons() & Qt::RightButton) stateLabel->setText(tr("右键按下中间图片")); else if (mouseEvent->buttons() & Qt::MidButton) stateLabel->setText(tr("中键按下中间图片")); QMatrix matrix; matrix.scale(1.8, 1.8); QImage tmpImg = Image2.transformed(matrix); label2->setPixmap(QPixmap::fromImage(tmpImg)); } else if (event->type() == QEvent::MouseButtonRelease) { stateLabel->setText(tr("鼠标释放中间图片")); label2->setPixmap(QPixmap::fromImage(Image2)); } } else if (watched == label3) { if (event->type() == QEvent::MouseButtonPress) { QMouseEvent *mouseEvent = (QMouseEvent *)event; if (mouseEvent->buttons() & Qt::LeftButton) stateLabel->setText(tr("左键按下右边图片")); else if (mouseEvent->buttons() & Qt::MidButton) stateLabel->setText(tr("中键按下右边图片")); else if (mouseEvent->buttons() & Qt::RightButton) stateLabel->setText(tr("右键按下右边图片")); QMatrix matrix; matrix.scale(1.8, 1.8); QImage tmpImag = Image3.transformed(matrix); label3->setPixmap(QPixmap::fromImage(tmpImag)); } if (event->type() == QEvent::MouseButtonRelease) { stateLabel->setText(tr("鼠标释放右边图片")); label3->setPixmap(QPixmap::fromImage(Image3)); } } return QDialog::eventFilter(watched, event); }