利用Python自制一个批量图片水印添加器

# It imports all the classes, attributes, and methods of the PyQt5.QtCore module into the global symbol table.
from PyQt5.QtCore import *

# It imports all the classes, attributes, and methods of the PyQt5.QtWidgets module into the global symbol table.
from PyQt5.QtWidgets import QApplication, QWidget, QHBoxLayout, QVBoxLayout, QTextBrowser, QLineEdit, QPushButton, \
    QFormLayout, QFileDialog, QLabel

# It imports all the classes, attributes, and methods of the PyQt5.QtGui module into the global symbol table.
from PyQt5.QtGui import QIcon, QFont, QTextCursor

# It imports the sys module.
import sys

# It imports the os module.
import os

# It imports the logger from the loguru module.
from loguru import logger

# It imports the add_mark function from the marker module in the watermarker package.
from watermarker.marker import add_mark

# This class is a widget that contains a QLabel and a QPushButton
class PicWaterUI(QWidget):
    def __init__(self):
        """
        A constructor. It is called when an object is created from a class and it allows the class to initialize the
        attributes of a class.
        """
        super(PicWaterUI, self).__init__()
        self.init_ui()

    def init_ui(self):
        """
        This function initializes the UI.
        """
        self.setWindowTitle('批量图片水印添加器  公众号：Python 集中营！')
        self.setWindowIcon(QIcon('water.ico'))

        self.brower = QTextBrowser()
        self.brower.setFont(QFont('宋体', 8))
        self.brower.setReadOnly(True)
        self.brower.setPlaceholderText('处理进程展示区域...')
        self.brower.ensureCursorVisible()

        self.pic_file_path = QLineEdit()
        self.pic_file_path.setPlaceholderText('源批量图片路径')
        self.pic_file_path.setReadOnly(True)

        self.pic_file_path_btn = QPushButton()
        self.pic_file_path_btn.setText('源图片路径')
        self.pic_file_path_btn.clicked.connect(self.pic_file_path_btn_click)

        self.new_pic_file_path = QLineEdit()
        self.new_pic_file_path.setPlaceholderText('新图片存储路径')
        self.new_pic_file_path.setReadOnly(True)

        self.new_pic_file_path_btn = QPushButton()
        self.new_pic_file_path_btn.setText('保存路径')
        self.new_pic_file_path_btn.clicked.connect(self.new_pic_file_path_btn_click)

        self.water_current_label = QLabel()
        self.water_current_label.setText('水印内容：')

        self.water_current_in = QLineEdit()
        self.water_current_in.setPlaceholderText('Python 集中营')

        self.water_angle_label = QLabel()
        self.water_angle_label.setText('水印角度：')

        self.water_angle_in = QLineEdit()
        self.water_angle_in.setPlaceholderText('30')

        self.water_back_label = QLabel()
        self.water_back_label.setText('水印透明度：')

        self.water_back_in = QLineEdit()
        self.water_back_in.setPlaceholderText('0.3')

        self.water_font_label = QLabel()
        self.water_font_label.setText('水印字体大小：')

        self.water_font_in = QLineEdit()
        self.water_font_in.setPlaceholderText('30')

        self.water_space_label = QLabel()
        self.water_space_label.setText('水印间隔：')

        self.water_space_in = QLineEdit()
        self.water_space_in.setPlaceholderText('40')

        self.water_color_label = QLabel()
        self.water_color_label.setText('水印颜色：')

        self.water_color_in = QLineEdit()
        self.water_color_in.setPlaceholderText('#8B8B1B')

        self.start_btn = QPushButton()
        self.start_btn.setText('开始添加水印')
        self.start_btn.clicked.connect(self.start_btn_click)

        hbox = QHBoxLayout()
        hbox.addWidget(self.brower)

        fbox = QFormLayout()
        fbox.addRow(self.pic_file_path, self.pic_file_path_btn)
        fbox.addRow(self.new_pic_file_path, self.new_pic_file_path_btn)
        fbox.addRow(self.water_current_label, self.water_current_in)
        fbox.addRow(self.water_angle_label, self.water_angle_in)
        fbox.addRow(self.water_back_label, self.water_back_in)
        fbox.addRow(self.water_font_label, self.water_font_in)
        fbox.addRow(self.water_space_label, self.water_space_in)
        fbox.addRow(self.water_color_label, self.water_color_in)

        v_vbox = QVBoxLayout()
        v_vbox.addWidget(self.start_btn)

        vbox = QVBoxLayout()
        vbox.addLayout(fbox)
        vbox.addLayout(v_vbox)

        hbox.addLayout(vbox)

        self.thread_ = PicWaterThread(self)
        self.thread_.message.connect(self.show_message)
        self.thread_.finished.connect(self.finshed)

        self.setLayout(hbox)

    def show_message(self, text):
        """
        It shows a message

        :param text: The text to be displayed
        """
        cursor = self.brower.textCursor()
        cursor.movePosition(QTextCursor.End)
        self.brower.append(text)
        self.brower.setTextCursor(cursor)
        self.brower.ensureCursorVisible()

    def pic_file_path_btn_click(self):
        """
        It opens a file dialog box and allows the user to select a file.
        """
        pic_file_path = QFileDialog.getExistingDirectory(self, '选择文件夹', os.getcwd())
        self.pic_file_path.setText(pic_file_path)

    def new_pic_file_path_btn_click(self):
        """
        This function opens a file dialog box and allows the user to select a file to save the output to.
        """
        new_pic_file_path = QFileDialog.getExistingDirectory(self, '选择文件夹', os.getcwd())
        self.new_pic_file_path.setText(new_pic_file_path)

    def start_btn_click(self):
        """
        A function that is called when the start button is clicked.
        """
        self.thread_.start()
        self.start_btn.setEnabled(False)

    def finshed(self, finished):
        """
        :param finished: A boolean value that is True if the download is finished, False otherwise
        """
        if finished is True:
            self.start_btn.setEnabled(True)

# This class is a subclass of QThread, and it's used to watermark pictures
class PicWaterThread(QThread):
    # A signal that is emitted when a message is received.
    message = pyqtSignal(str)
    # A signal that is emitted when the download is finished.
    finished = pyqtSignal(bool)

    def __init__(self, parent=None):
        """
        A constructor that initializes the class.

        :param parent: The parent widget
        """
        super(PicWaterThread, self).__init__(parent)
        self.working = True
        self.parent = parent

    def __del__(self):
        """
        A destructor. It is called when the object is destroyed.
        """
        self.working = True
        self.wait()

    def run(self) -> None:
        """
        > This function runs the program
        """
        try:
            directory = self.parent.pic_file_path.text().strip()
            water_name = self.parent.water_current_in.text().strip()
            new_directory = self.parent.new_pic_file_path.text().strip()
            water_angle_in = self.parent.water_angle_in.text().strip()
            water_back_in = self.parent.water_back_in.text().strip()
            water_font_in = self.parent.water_font_in.text().strip()
            water_space_in = self.parent.water_space_in.text().strip()
            color = self.parent.water_color_in.text().strip()

            self.message.emit('源文件路径：{}'.format(directory))
            self.message.emit('水印内容：{}'.format(water_name))
            self.message.emit('保存文件路径：{}'.format(new_directory))
            self.message.emit('水印角度：{}'.format(water_angle_in))
            self.message.emit('水印透明度：{}'.format(water_back_in))
            self.message.emit('水印字体大小：{}'.format(water_font_in))
            self.message.emit('水印间隔：{}'.format(water_space_in))
            self.message.emit('水印颜色：{}'.format(color))

            if directory is None or water_name is None:
                logger.info('文件夹地址或水印名称不能为空！')
                return
            for file_name in os.listdir(directory):
                logger.info('当前文件名称：{0}，即将开始添加水印操作！'.format(file_name))
                self.message.emit('当前文件名称：{0}，即将开始添加水印操作！'.format(file_name))
                add_mark(file=os.path.join(directory, file_name), out=new_directory, mark=water_name,
                         opacity=float(water_back_in), angle=int(water_angle_in), space=int(water_space_in),
                         size=int(water_font_in), color=color)
                self.message.emit('当前文件名称：{0}，已经完成添加水印操作！'.format(file_name))
                logger.info('当前文件名称：{0}，已经完成添加水印操作！'.format(file_name))
            self.finished.emit(True)
        except Exception as e:
            self.message.emit('文件内容读取或格式化发生异常！')
            self.finished.emit(True)

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