impl ImgSaveThread to write edited image

## 界面说明及快捷键

* Ctrl+Z, Ctrl+Y可以撤销重做大部分操作，注意翻页后撤消重做栈会清空

* A/D翻页, 如果当前页面未保存会自动保存, 大图会卡一会

* A/D翻页, 如果当前页面未保存会自动保存

* 文本编辑模式下(底部最右"T"图标), W激活文本块创建模式后在画布右键拉文本框

* 画板模式下右下角滑条改原图透明度

* 底部左侧"OCR"和"A"按钮控制启用/禁用OCR翻译功能, 禁用后再Run程序就只做文本检测和抹字  

import os

import json

from PyQt5.QtWidgets import QMainWindow, QHBoxLayout, QVBoxLayout, QApplication, QStackedWidget, QWidget, QFileDialog, QLabel, QSizePolicy, QComboBox, QListView, QToolBar, QMenu, QSpacerItem, QPushButton, QAction, QCheckBox, QToolButton, QSplitter, QListWidget, QShortcut, QListWidgetItem

from PyQt5.QtWidgets import QMainWindow, QHBoxLayout, QVBoxLayout, QApplication, QStackedWidget, QWidget, QSizePolicy, QComboBox, QListView, QToolBar, QMenu, QSpacerItem, QPushButton, QAction, QCheckBox, QToolButton, QSplitter, QListWidget, QShortcut, QListWidgetItem

from PyQt5.QtCore import Qt, pyqtSignal, QPoint, QSize, QThread

from PyQt5.QtGui import QGuiApplication, QIcon, QCloseEvent, QKeySequence, QImage, QPainter

from PyQt5.QtGui import QGuiApplication, QIcon, QCloseEvent, QKeySequence, QImage, QPainter, QFont

from typing import List, Union, Tuple

from .scenetext_manager import SceneTextManager

from .mainwindowbars import TitleBar, LeftBar, RightBar, BottomBar

from .io_thread import ImgSaveThread

from .stylewidgets import FrameLessMessageBox

from .constants import STYLESHEET_PATH, CONFIG_PATH, DPI, LDPI, LANG_SUPPORT_VERTICAL

from . import constants

class PageListView(QListWidget):    

    def __init__(self, *args, **kwargs) -> None:

        super().__init__(*args, **kwargs)

        self.centralStackWidget = QStackedWidget(self)

        self.titleBar = TitleBar(self)

        self.titleBar.closebtn_clicked.connect(self.on_closebtn_clicked)

        self.bottomBar = BottomBar(self)

        self.bottomBar.textedit_checkchanged.connect(self.setTextEditMode)

        self.bottomBar.paintmode_checkchanged.connect(self.setPaintMode)

        config_dict = self.config.to_dict()

        with open(CONFIG_PATH, 'w', encoding='utf8') as f:

            f.write(json.dumps(config_dict, ensure_ascii=False, indent=4, separators=(',', ':')))

            # yaml.safe_dump(config_dict, f)

        return super().closeEvent(event)

    def onHideCanvas(self):

                row = (row + 1) % page_count

                self.pageList.setCurrentRow(row)

    def shortcutBefore(self):

        if self.centralStackWidget.currentIndex() == 0:

            index = self.pageList.currentIndex()

                                    size.height() - msg_size.height()))

        self.dl_manager.progress_msgbox.move(p)

    def on_closebtn_clicked(self):

        if self.imsave_thread.isRunning():

            self.imsave_thread.finished.connect(self.close)

            mb = FrameLessMessageBox()

            mb.setText(self.tr('Saving image...'))

            self.imsave_thread.finished.connect(mb.close)

            mb.exec()

            return

        self.close()

class TitleBar(Widget):

    closebtn_clicked = pyqtSignal()

    def __init__(self, parent, *args, **kwargs) -> None:

        super().__init__(parent, *args, **kwargs)

        self.mainwindow : QMainWindow = parent

        self.maxBtn.clicked.connect(self.onMaxBtnClicked)

        self.closeBtn = QPushButton()

        self.closeBtn.setObjectName('closeBtn')

        self.closeBtn.clicked.connect(self.onCloseBtnClicked)

        self.closeBtn.clicked.connect(self.closebtn_clicked)

        self.maxBtn.setFixedSize(72, 40)

        hlayout = QHBoxLayout(self)

        hlayout.setAlignment(Qt.AlignmentFlag.AlignCenter)

    def onMinBtnClicked(self):

        self.mainwindow.showMinimized()

    def onCloseBtnClicked(self):

        self.mainwindow.close()

    def mousePressEvent(self, event: QMouseEvent) -> None:

        if event.button() == Qt.LeftButton:

            if not self.mainwindow.isMaximized() and \

from PyQt5.QtWidgets import QGraphicsOpacityEffect, QFrame, QWidget, QComboBox, QLabel, QSizePolicy, QDialog, QProgressBar, QToolBar, QMenu, QSpacerItem, QPushButton, QHBoxLayout, QVBoxLayout, QToolButton, QSplitter, QStylePainter, QStyleOption, QStyle, QSlider, QProxyStyle, QStyle, QStyleOptionSlider, QColorDialog

from PyQt5.QtWidgets import QGraphicsOpacityEffect, QFrame, QWidget, QComboBox, QLabel, QSizePolicy, QDialog, QProgressBar, QMessageBox, QMenu, QSpacerItem, QPushButton, QHBoxLayout, QVBoxLayout, QToolButton, QSplitter, QStylePainter, QStyleOption, QStyle, QSlider, QProxyStyle, QStyle, QStyleOptionSlider, QColorDialog

from PyQt5.QtCore import Qt, QPropertyAnimation, QEasingCurve, QPointF, QRect, pyqtSignal, QSizeF, QObject, QEvent

from PyQt5.QtGui import QFontMetrics, QMouseEvent, QShowEvent, QWheelEvent, QResizeEvent, QKeySequence, QPainter, QTextFrame, QTransform, QTextBlock, QAbstractTextDocumentLayout, QTextLayout, QFont, QFontMetrics, QColor, QTextFormat, QTextCursor, QTextCharFormat, QTextDocument

from typing import List, Union, Tuple

        self.textlabel.setText(msg)

        self.progressbar.setValue(progress)

class FrameLessMessageBox(QMessageBox):

    def __init__(self, *args, **kwargs) -> None:

        super().__init__(*args, **kwargs)

        self.setWindowFlags(Qt.WindowType.FramelessWindowHint)

class ProgressMessageBox(QDialog):

    showed = pyqtSignal()

    def __init__(self, *args, **kwargs) -> None: