我的实际应用比这个复杂得多,但以下示例总结了我问题的大部分。我有多个QLabel,我对它们进行了子类化以使它们可点击。标签显示16x16图像,需要通过Pillow加载图像,将它们转换为ImageQt对象,然后设置标签的像素映射。在该示例中,我有3个可点击的QLabel,每次单击时都会运行print_something函数。我的目标是能够按住鼠标,并在悬停在每个标签上时调用该功能。任何指针都将是很好的帮助。
from PyQt5 import QtCore, QtWidgets, QtGui
from PIL import Image
from PIL.ImageQt import ImageQt
import sys
class ClickableLabel(QtWidgets.QLabel):
def __init__(self):
super().__init__()
clicked = QtCore.pyqtSignal()
def mousePressEvent(self, ev):
if app.mouseButtons() & QtCore.Qt.LeftButton:
self.clicked.emit()
class MainWindow(QtWidgets.QMainWindow):
def __init__(self):
super().__init__()
central_widget = QtWidgets.QWidget()
self.setFixedSize(300, 300)
image = Image.open("16x16image.png")
image_imageqt = ImageQt(image)
hbox = QtWidgets.QHBoxLayout()
hbox.setSpacing(0)
hbox.addStretch()
label01 = ClickableLabel()
label01.setPixmap(QtGui.QPixmap.fromImage(image_imageqt))
label01.clicked.connect(self.print_something)
hbox.addWidget(label01)
label02 = ClickableLabel()
label02.setPixmap(QtGui.QPixmap.fromImage(image_imageqt))
label02.clicked.connect(self.print_something)
hbox.addWidget(label02)
label03 = ClickableLabel()
label03.setPixmap(QtGui.QPixmap.fromImage(image_imageqt))
label03.clicked.connect(self.print_something)
hbox.addWidget(label03)
hbox.addStretch()
central_widget.setLayout(hbox)
self.setCentralWidget(central_widget)
def print_something(self):
print("Printing something..")
if __name__ == "__main__":
app = QtWidgets.QApplication(sys.argv)
main_window = MainWindow()
main_window.show()
sys.exit(app.exec_())