[游戏开发]PyQT

from PyQt5.Qt import *
import sys

class Window(QWidget):
    def __init__(self):
        super().__init__()
        self.setWindowTitle("QLineEdit..")
        self.resize(500, 400)
        self.setup_ui()
    def setup_ui(self):
        ql_a = QLineEdit(self)
        ql_a.setPlaceholderText("Text...")
        action = QAction(self)
        action.setIcon(QIcon("xxx.png"))
        ql_a.addAction(action, QLineEdit.TrailingPosition)
        ql_a.setEchoMode(QLineEdit.Password)
        ql_a.move(100, 100)

        ql_b = QLineEdit(self)
        ql_b.move(100, 150)

        btn = QPushButton(self)
        btn.setText('copy')
        btn.move(100, 200)

        btn1 = QPushButton(self)
        btn1.setText('cancel')
        btn1.move(200, 200)
        def cancel():
            ql_a.deselect()
        btn1.clicked.connect(cancel)

        def copy():
            text = ql_a.text()
            print(text)
            ql_a.setSelection(0, len(text))
            ql_b.setText(text)
        btn.clicked.connect(copy)

if __name__ == '__main__':
    app = QApplication(sys.argv)
    window = Window()
    window.show()
    sys.exit(app.exec_())

窗口居中

"""
@from：https://pythoneers.cn
@author: qq3330447288
@contact: erics1996@yeah.net
@software: PyCharm
@file: FirstMainWindow.py
@time: 2020/11/17 上午9:50
"""
import sys
from PyQt5.QtWidgets import QMainWindow, QApplication, QDesktopWidget
from PyQt5.QtGui import QIcon

class CenterMainWin(QMainWindow):
    def __init__(self):
        """
        初始化
        :param parent:控件放到parent
        """
        super(CenterMainWin, self).__init__()
        # 设置主窗口的标题
        self.setWindowTitle('窗口居中')
        # 设置窗口的尺寸
        self.resize(400, 300)
        # 获取当前的状态栏(默认是有状态栏的)
        self.status = self.statusBar()
        # 设置状态栏显示的消息(消息只存在5s)
        self.status.showMessage('只显示5s的消息！', 5000)

    def center(self):
        # 获取屏幕坐标系
        screen = QDesktopWidget().screenGeometry()
        # 获取窗口坐标系
        size = self.geometry()
        left = (screen.width() - size.width()) / 2
        top = (screen.height() - size.height()) / 2
        # 移动窗口
        self.move(left, top)

if __name__ == '__main__':
    # 创建一个应用程序对象(传入参数)
    app = QApplication(sys.argv)
    # 设置应用程序的图标
    app.setWindowIcon(QIcon('../images/Dragon.ico'))
    # 创建窗口类的对象
    main = CenterMainWin()
    # 显示窗口
    main.show()
    # 窗口居中
    main.center()
    # 调用exit()进入程序的主循环
    sys.exit(app.exec_())