在 PyQt 中获取 ListWidget 项文本和图像

Posted 2023-02-22

【中文标题】在 PyQt 中获取 ListWidget 项文本和图像

【英文标题】：Getting ListWidget Item Text and Image in PyQt

【发布时间】：2016-01-21 20:32:55

【问题描述】：

我有一个 QListwidget 。我添加了一个显示图像的自定义项目。我想要做的是单击此小部件中的项目时，打印选定的标签文本并获取标签的图像。但它什么也不打印并给出错误：AttributeError: 'QListWidgetItem' object has no attribute 'pixmap'。那么问题是什么？

class MyList(QtGui.QListWidget):
    def __init__(self):
        QtGui.QListWidget.__init__(self)
        directory = QtGui.QFileDialog.getOpenFileNames(self, 'Open file',
                                                       'c:\\Users\\Public\\Pictures\\Sample Pictures',"Image files (*.jpg *.gif)")
        for i in range(len(directory)):
            images = QtGui.QImage(directory[i])
            pixmap = QtGui.QPixmap.fromImage(images)
            label = QtGui.QLabel(str(i))
            label.setPixmap(pixmap.scaled(QtCore.QSize(150,100)))
            item = QtGui.QListWidgetItem(label.text())
            item.setSizeHint(QtCore.QSize(200,110))
            self.addItem(item)
            self.setItemWidget(item,label)
        self.setIconSize(QtCore.QSize(150,100))
        self.setSelectionMode(1)            # 1 = SingleSelection, 2 = MultiSelection, not necessary, default mode is singleSelection
        self.setGeometry(200,200,300,500)

        self.currentItemChanged.connect(self.findSel)

    def findSel(self, current, previous):
        print(current.text())
        self.labelBigImageDisplay(current.pixmap())

【参考方案1】：

由于 QLabel 不同时支持文本和图像，您可能需要考虑实现自己的小部件，或者您可能需要使用 QPushButton 等东西。并回答您需要询问 itemWidget 的原始问题数据。

def findSel(self, current):
    currentItem = self.itemWidget(current)
    pixmap = currentItem.pixmap()
    print pixmap

实现自定义小部件

这是您代码中的最小示例

mport sys
from PyQt4 import QtCore, QtGui

class MyCustomWid(QtGui.QWidget):
    def __init__(self, label, imagePath, parent=None):
        super(MyCustomWid, self).__init__(parent)
        horizontalLayout = QtGui.QHBoxLayout()
        self.imagePath = imagePath
        self.captLbl = label
        self.captLbl = QtGui.QLabel(self.captLbl)
        horizontalLayout.addWidget(self.captLbl)
        self.imageLbl = QtGui.QLabel()
        pixmap = QtGui.QPixmap.fromImage(QtGui.QImage(self.imagePath))
        self.imageLbl.setPixmap(pixmap.scaled(QtCore.QSize(150,100)))
        horizontalLayout.addWidget(self.imageLbl)
        self.setLayout(horizontalLayout)

    def getPixmap(self):
        return self.imageLbl.pixmap()

    def getImagePath(self):
        return self.imagePath

    def getText(self):
        return self.captLbl.text()

class MyList(QtGui.QListWidget):
    def __init__(self):
        QtGui.QListWidget.__init__(self)
        imagePath = "/usr/bla/some/foo.png"
        label = MyCustomWid("Blaa", imagePath)
        item = QtGui.QListWidgetItem()
        item.setSizeHint(QtCore.QSize(200,110))
        self.addItem(item)
        self.setItemWidget(item,label)
        self.setIconSize(QtCore.QSize(150,100))
        self.setSelectionMode(1)            # 1 = SingleSelection, 2 = MultiSelection, not necessary, default mode is singleSelection
        self.setGeometry(200,200,300,500)
        self.itemClicked.connect(self.findSel)

    def findSel(self, current):
        currentItem = self.itemWidget(current)
        pixmap = currentItem.getPixmap()
        imagePath = currentItem.getImagePath()
        lblTxt = currentItem.getText()
        print pixmap, imagePath, lblTxt
        # self.labelBigImageDisplay(current.pixmap())

class MyWindow(QtGui.QDialog):
    def __init__(self):
        super(MyWindow, self).__init__()
        layout = QtGui.QVBoxLayout()
        textLbl = MyList()
        layout.addWidget(textLbl)
        self.setLayout(layout)

if __name__ == '__main__':
    app=QtGui.QApplication(sys.argv)
    new=MyWindow()
    new.show()
    app.exec_()