pyqt-todolist/view/AddToDoLabel.py

from PyQt5.QtWidgets import QLabel, QLineEdit, QHBoxLayout
from PyQt5.QtGui import QPixmap
from PyQt5.QtCore import Qt, pyqtSignal


class AddToDoAction(QLabel):
    # 发送创建的ToDo名字
    todo_name = pyqtSignal(str)

    def __init__(self):
        super(AddToDoAction, self).__init__()
        self.setObjectName('add_todo_label')
        # widget = QWidget(self)
        self.setMinimumWidth(700)
        layout = QHBoxLayout()
        # widget.setLayout(layout)
        icon = QPixmap('../images/add.png').scaled(30, 30, Qt.IgnoreAspectRatio, Qt.SmoothTransformation)
        self.icon_label = QLabel()
        self.icon_label.setPixmap(icon)
        self.icon_label.setMaximumSize(30, 30)
        self.icon_label.setScaledContents(True)
        # icon_label.resize(icon.width(), icon.height())
        self.line_edit = QLineEdit()
        # self.line_edit.setMinimumHeight(50)
        # self.line_edit.clicked.connect(self.line_edit_action)
        self.line_edit.setObjectName('add_line_edit')
        self.line_edit.setPlaceholderText('添加任务')
        # 回车事件
        # self.line_edit.returnPressed.connect(lambda: self.line_edit_add(self.line_edit.text()))

        layout.addWidget(self.icon_label, 1, Qt.AlignLeft)
        layout.addWidget(self.line_edit, 6, Qt.AlignLeft)
        layout.addStretch(1)

        self.setScaledContents(True)

        # self.sizeHint()
        self.setLayout(layout)
        self.show()