from PyQt5.QtWidgets import (QMainWindow, QApplication, QDesktopWidget, QWidget, QFrame,
                             QLabel, QPushButton, QComboBox, QCheckBox, QSpinBox, QDialog, QFileDialog, QMessageBox)
from PyQt5.QtGui import QIcon, QFont, QColor, QImage, QPixmap, QPen, QPainter
from PyQt5.QtCore import QRect, Qt, QPoint, QMetaObject, QThread  

class Ui_MainWindow(QMainWindow):
    """主體窗口設置"""
    def __init__(self):
        super().__init__()
        self.setObjectName("MainWindow")  # 設置窗口對象名稱
        self.setWindowTitle('屏幕錄制')    # 設置窗口標題
        self.resize(512, 352)   # 設置窗口大小
        self.setupUi()     # 設置顯示部件
        self.show()        # 窗口顯示
    def setipUi(self):
        # 設置窗口需要顯示的部件
        # self.centralwidget = QWidget(self)  部件載體
        # self.centralwidget.setObjectName("centralwidget")
        # 標簽框設置： QLabel(self.centralwidget)
        # 復選框設置： QCheckBox(self.centralwidget)
        # 按鍵設置：   QPushButton(self.centralwidget)
        # 調度框設置： QSpinBox(self.centralwidget)
def main():
    """運行函數"""
    app = QApplication(sys.argv)
    app.setAttribute(Qt.AA_UseHighDpiPixmaps)
    ui = Ui_MainWindow()
    sys.exit(app.exec_())
if __name__ == '__main__':
    main()

class MousePaint(QDialog):
    """移動鼠標獲取屏幕捕獲范圍"""

    def __init__(self):
        super().__init__()
        self.setMouseTracking(True)
        # 設置窗口布滿整個屏幕
        self.showFullScreen()
        # 設置窗體無邊框
        self.setWindowFlags(Qt.FramelessWindowHint)  # 窗口置頂，無邊框
        # 設置背景透明
        self.setWindowOpacity(0.5)
        self.initUI()
        self.setFocus()
    def initUI(self):
        self.setGeometry(*(QDesktopWidget().screenGeometry()).getRect())
        self.pix = QPixmap()
        self.lastpoint = QPoint()
        self.endpoint = QPoint()
        self.pos = None
        self.bline = 0
    def mousePressEvent(self, event):
        # 監聽鼠標按壓事件
        if event.button() == Qt.LeftButton:
            self.lastpoint = event.x(), event.y()
            self.bline = 1
        elif event.button() == Qt.RightButton:
            self.close()
        event.accept()
    def mouseReleaseEvent(self, event):
        # 監聽鼠標釋放事件
        self.endpoint = event.x(), event.y()
        self.close()
    def mouseMoveEvent(self, event):
        # 監聽鼠標移動事件
        if self.bline == 1:
            self.pos = event.x(), event.y()
            event.accept()
            self.update()
    def paintEvent(self, event):
        # 繪畫事件
            pp = QPainter(self)
            pen = QPen()  # 定義筆格式對象
            pen.setWidth(5)  # 設置筆的寬度
            pen.setColor(QColor(255, 0, 0))
            pp.setPen(pen)
            lpx, lpy = self.lastpoint
            pp.drawRect(lpx, lpy, self.pos[0] - lpx, self.pos[1] - lpy)

from PyQt5.QtCore import QThread  # Pyqt5的QThread類
from Screenshot_record import Screenshot

class Thread_screenshot(QThread):
    def __init__(self):
        super().__init__()
        self.screen = Screenshot()  # 屏幕錄制類