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7.5 初次更新

在PNG格式的基礎(chǔ)上新增了jpg、jpeg和bmp格式（其他格式的水印真的有必要嗎...）
上傳的水印圖片現(xiàn)在會在按鈕內(nèi)顯示預(yù)覽圖！
選擇圖片后，會顯示生成的圖片數(shù)量和路徑，并增加了一個小進度條

以下是代碼

import os
import sys
from PyQt5.QtWidgets import QApplication, QMainWindow, QWidget, QPushButton, QFileDialog, QGridLayout, QSizePolicy, QLabel, QProgressBar
from PyQt5.QtGui import QIcon, QPixmap
from PyQt5.QtCore import Qt, QSize
from PIL import Image
 
class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        self.setWindowTitle("水印工具2.0")
        self.setWindowIcon(QIcon("push.ico"))
 
        self.central_widget = QWidget()
        self.setCentralWidget(self.central_widget)
        self.layout = QGridLayout(self.central_widget)
        self.layout.setSpacing(0)
 
        self.watermark_path = ""
        self.image_paths = []
        self.output_folder = ""
 
        self.watermark_button = QPushButton("選擇水印圖片")
        self.watermark_button.clicked.connect(self.select_watermark)
        self.layout.addWidget(self.watermark_button, 2,0)
 
        self.image_button = QPushButton("選擇圖片")
        self.image_button.clicked.connect(self.select_images)
        self.layout.addWidget(self.image_button, 2, 1)
 
        self.folder_label = QLabel()
        self.layout.addWidget(self.folder_label, 3, 0)
 
        self.folder_button = QPushButton("選擇輸出文件夾")
        self.folder_button.clicked.connect(self.select_output_folder)
        self.layout.addWidget(self.folder_button, 4, 0)
 
        self.start_button = QPushButton("開始添加水印")
        self.start_button.clicked.connect(self.start_watermarking)
        self.layout.addWidget(self.start_button, 4, 1)
 
        self.progress_bar = QProgressBar()
        self.layout.addWidget(self.progress_bar, 5, 0, 1, 2)
 
        self.central_widget.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding)
        self.watermark_button.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding)
        self.image_button.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding)
        self.folder_button.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding)
        self.start_button.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding)
 
        self.central_widget.setLayout(self.layout)
        self.setMinimumSize(500, 500)
        self.show()
 
    def select_watermark(self):
        file_dialog = QFileDialog()
        file_dialog.setNameFilter("Image files (*.png *.jpg *.jpeg *.bmp)")
        if file_dialog.exec_():
            self.watermark_path = file_dialog.selectedFiles()[0]
            pixmap = QPixmap(self.watermark_path)
            pixmap = pixmap.scaled(self.watermark_button.size(), Qt.KeepAspectRatio, Qt.SmoothTransformation)
            scaled_path = os.path.join(os.path.dirname(self.watermark_path), "scaled_watermark.png")
            pixmap.save(scaled_path)
            scaled_path = scaled_path.replace('\\', '/')  # 替換路徑中的反斜杠為正斜杠
            self.watermark_button.setStyleSheet(f"QPushButton {{background-image: url({scaled_path}); background-position: center; background-repeat: no-repeat; background-attachment: fixed}}")
 
    def select_images(self):
        file_dialog = QFileDialog()
        file_dialog.setNameFilter("Image files (*.png *.jpg *.jpeg)")
        file_dialog.setFileMode(QFileDialog.ExistingFiles)
        if file_dialog.exec_():
            self.image_paths = file_dialog.selectedFiles()
 
            # 更新按鈕顯示選擇的文件數(shù)量
            self.image_button.setText(f"選擇圖片 ({len(self.image_paths)})")
 
            pixmap = QPixmap(self.image_paths[0])
            pixmap = pixmap.scaled(self.image_button.size(), Qt.KeepAspectRatio, Qt.SmoothTransformation)
            pixmap.save("scaled_image.png")
            self.image_button.setStyleSheet("QPushButton {background-image: url(" + os.path.abspath("scaled_image.png") + "); background-position: center; background-repeat: no-repeat; background-attachment: fixed}")
 
    def select_output_folder(self):
        file_dialog = QFileDialog()
        file_dialog.setFileMode(QFileDialog.DirectoryOnly)
        if file_dialog.exec_():
            self.output_folder = file_dialog.selectedFiles()[0]
            self.folder_button.setText("輸出文件夾: " + self.output_folder)
 
    def start_watermarking(self):
        self.progress_bar.setMaximum(len(self.image_paths))
 
      &