如何在自定义QListWidget中将QLabel放到另一个QLabel上?

时间:2018-01-27 03:10:26

标签: python pyqt pyqt4 qlistwidget qlistwidgetitem

我从here获得了此代码,并希望为我的项目修改它。不同之处在于我的项目需要图标在另一个QLabel上。使用Layouts无法实现这一点,所以我决定在QWidget上放置3个QLabel(一个用于图标或图片,另一个用于名称,最后一个用于消息),但我得到一个空窗口。这是我的代码。请不要介意使用的尺寸,因为我只想看到显示的小部件并编辑尺寸。

import sys
from PyQt4 import QtGui, QtCore
from PIL import Image, ImageOps
from PIL.ImageQt import ImageQt


class QCustomQWidget (QtGui.QWidget):
    def __init__ (self, parent = None):
        super(QCustomQWidget, self).__init__(parent)
        # self.textQVBoxLayout = QtGui.QVBoxLayout()
        self.widget = QtGui.QWidget()
        self.widget.setMinimumSize(151, 231)
        self.chatMessage = QtGui.QLabel(self.widget)
        # self.chatMessage.setGeometry(QtCore.QRect(50, 80, 411, 161))
        font = QtGui.QFont()
        font.setFamily('Comic Sans MS')
        font.setPointSize(11)
        self.chatMessage.setFont(font)
        self.chatMessage.setMinimumHeight(40)
        self.chatMessage.setStyleSheet('''
                color: rgb(255, 0, 0);
                border: 1px solid #0089ff;
                border-top-right-radius: 20px;
                border-bottom-right-radius: 20px;
                border-bottom-left-radius: 20px;
                padding-left: 60px;
                padding-top: 3px
            ''')
        self.userName = QtGui.QLabel(self.widget)
        font = QtGui.QFont()
        font.setFamily('Arial Narrow')
        font.setBold(True)
        font.setPointSize(11)
        self.userName.setFont(font)
        self.userName.setFixedHeight(30)
        self.userName.setAlignment(QtCore.Qt.AlignTop)
        self.userName.setStyleSheet('''
                color: rgb(255, 255, 255);
                background-color: #0089ff;
                border: 1px solid #0089ff;
                border-bottom: 0px;
                border-top-right-radius: 20px;
                border-top-left-radius: 20px;
                padding-left: 60px;
            ''')
        # self.textQVBoxLayout.addWidget(self.userName)
        # self.textQVBoxLayout.addWidget(self.chatMessage)
        # self.allQHBoxLayout  = QtGui.QHBoxLayout()
        self.iconQLabel      = QtGui.QLabel(self.widget)
        #self.allQHBoxLayout.setSpacing(0)
        #self.allQHBoxLayout.addWidget(self.iconQLabel, 0)
        #self.allQHBoxLayout.addLayout(self.textQVBoxLayout, 1)
        #self.setLayout(self.allQHBoxLayout)
        # self.iconQLabel.setFixedSize(60, 60)
        self.userName.setFixedWidth(190)
    def chat_messages (self, text):
        self.chatMessage.setText(text)

    def setTextUp (self, text):
        self.userName.setText(text)

    def setIcon (self, imagePath):
        mask = Image.open('Images\\Mask.png').convert('L')
        image = Image.open('Images\\pro.jpg')
        output = ImageOps.fit(image, mask.size, centering=(0.5, 0.5))
        output.putalpha(mask)
        output.save('pic.png')
        im = Image.open('pic.png')
        size =60, 60
        im.thumbnail(size, Image.LANCZOS)
        im = im.convert('RGBA')
        image1 = ImageQt(im)
        image2 = QtGui.QImage(image1)
        pixmap = QtGui.QPixmap.fromImage(image2)
        self.iconQLabel.setPixmap(QtGui.QPixmap(pixmap))

class exampleQMainWindow (QtGui.QMainWindow):
    def __init__ (self):
        super(exampleQMainWindow, self).__init__()
        self.showMaximized()
        self.myQListWidget = QtGui.QListWidget(self)
        for icon, name, message in [
            ('pic.png', 'Name', 'Message'),
            (pic.png', 'Name', 'Message')]:
            myQCustomQWidget = QCustomQWidget()
            myQCustomQWidget.setTextUp(name)
            myQCustomQWidget.chat_messages(message)
            myQCustomQWidget.setIcon(icon)
            myQListWidgetItem = QtGui.QListWidgetItem(self.myQListWidget)
            myQListWidgetItem.setSizeHint(myQCustomQWidget.sizeHint())
            self.myQListWidget.addItem(myQListWidgetItem)
            self.myQListWidget.setCurrentRow(-1)
            self.myQListWidget.setItemWidget(myQListWidgetItem, myQCustomQWidget)
            self.myQListWidget.scrollToBottom()
            self.myQListWidget.setAutoScrollMargin(15)
            self.myQListWidget.setSelectionRectVisible(False)
            self.myQListWidget.setUniformItemSizes(False)
        self.setCentralWidget(self.myQListWidget)
        self.setMinimumSize(660, 500)

app = QtGui.QApplication([])
window = exampleQMainWindow()
window.show()
sys.exit(app.exec_())

这样的东西,但是用不同的颜色 it was designed from Qt designer

1 个答案:

答案 0 :(得分:1)

您的代码有2个错误:

  1. 小部件相对于父级定位,如果他们没有父级,则除非他们是topLevel,否则他们将不会被显示,例如exampleQMainWindow,其他要显示的小部件必须具有家长。如果您的QCustomQWidget所有标签的父级都为self.widget,则self.widget没有父级,因此不会显示,也不会显示子级。简单的解决方案是将他作为self.widget的父级传递给self,但是检查他的代码不是必须使用self.widget所以解决方案是消除它并作为父级传递所有QLabelself

  2. 当不使用布局时,sizeHint()会返回值QSize(-1, -1),因此它不会显示任何内容,您有责任在我的解决方案中设置合适的sizeHint()将放置一个您应该更改的值。

  3. class QCustomQWidget (QtGui.QWidget):
        def __init__ (self, parent = None):
            super(QCustomQWidget, self).__init__(parent)
            # self.textQVBoxLayout = QtGui.QVBoxLayout()
            self.setMinimumSize(151, 231)
            self.chatMessage = QtGui.QLabel(self)
            # self.chatMessage.setGeometry(QtCore.QRect(50, 80, 411, 161))
            font = QtGui.QFont()
            font.setFamily('Comic Sans MS')
            font.setPointSize(11)
            self.chatMessage.setFont(font)
            self.chatMessage.setMinimumHeight(40)
            self.chatMessage.setStyleSheet('''
                    color: rgb(255, 0, 0);
                    border: 1px solid #0089ff;
                    border-top-right-radius: 20px;
                    border-bottom-right-radius: 20px;
                    border-bottom-left-radius: 20px;
                    padding-left: 60px;
                    padding-top: 3px
                ''')
            self.userName = QtGui.QLabel(self)
            font = QtGui.QFont()
            font.setFamily('Arial Narrow')
            font.setBold(True)
            font.setPointSize(11)
            self.userName.setFont(font)
            self.userName.setFixedHeight(30)
            self.userName.setAlignment(QtCore.Qt.AlignTop)
            self.userName.setStyleSheet('''
                    color: rgb(255, 255, 255);
                    background-color: #0089ff;
                    border: 1px solid #0089ff;
                    border-bottom: 0px;
                    border-top-right-radius: 20px;
                    border-top-left-radius: 20px;
                    padding-left: 60px;
                ''')
            # self.textQVBoxLayout.addWidget(self.userName)
            # self.textQVBoxLayout.addWidget(self.chatMessage)
            # self.allQHBoxLayout  = QtGui.QHBoxLayout()
            self.iconQLabel      = QtGui.QLabel(self)
            #self.allQHBoxLayout.setSpacing(0)
            #self.allQHBoxLayout.addWidget(self.iconQLabel, 0)
            #self.allQHBoxLayout.addLayout(self.textQVBoxLayout, 1)
            #self.setLayout(self.allQHBoxLayout)
            # self.iconQLabel.setFixedSize(60, 60)
            self.userName.setFixedWidth(190)
        def chat_messages (self, text):
            self.chatMessage.setText(text)
    
        def setTextUp (self, text):
            self.userName.setText(text)
    
        def setIcon (self, imagePath):
            mask = Image.open('Images\\Mask.png').convert('L')
            image = Image.open('Images\\pro.jpg')
            output = ImageOps.fit(image, mask.size, centering=(0.5, 0.5))
            output.putalpha(mask)
            output.save('pic.png')
            im = Image.open('pic.png')
            size =60, 60
            im.thumbnail(size, Image.LANCZOS)
            im = im.convert('RGBA')
            image1 = ImageQt(im)
            image2 = QtGui.QImage(image1)
            pixmap = QtGui.QPixmap.fromImage(image2)
            self.iconQLabel.setPixmap(QtGui.QPixmap(pixmap))
    
        def sizeHint(self):
            return QtCore.QSize(60, 60)