Added code

ui/modules/blur.py

@@ -0,0 +1,133 @@
+# source: https://github.com/Opticos/GWSL-Source/blob/master/blur.py,
+# https://www.cnblogs.com/zhiyiYo/p/14659981.html ,
+# https://github.com/ifwe/digsby/blob/master/digsby/src/gui/vista.py
+import platform
+import ctypes
+
+
+if platform.system() == 'Windows':
+    from ctypes.wintypes import DWORD, BOOL, HRGN, HWND
+
+    user32 = ctypes.windll.user32
+    dwm = ctypes.windll.dwmapi
+
+
+    class ACCENTPOLICY(ctypes.Structure):
+        _fields_ = [
+            ("AccentState", ctypes.c_uint),
+            ("AccentFlags", ctypes.c_uint),
+            ("GradientColor", ctypes.c_uint),
+            ("AnimationId", ctypes.c_uint)
+        ]
+
+
+    class WINDOWCOMPOSITIONATTRIBDATA(ctypes.Structure):
+        _fields_ = [
+            ("Attribute", ctypes.c_int),
+            ("Data", ctypes.POINTER(ctypes.c_int)),
+            ("SizeOfData", ctypes.c_size_t)
+        ]
+
+
+    class DWM_BLURBEHIND(ctypes.Structure):
+        _fields_ = [
+            ('dwFlags', DWORD),
+            ('fEnable', BOOL),
+            ('hRgnBlur', HRGN),
+            ('fTransitionOnMaximized', BOOL)
+        ]
+
+
+    class MARGINS(ctypes.Structure):
+        _fields_ = [("cxLeftWidth", ctypes.c_int),
+                    ("cxRightWidth", ctypes.c_int),
+                    ("cyTopHeight", ctypes.c_int),
+                    ("cyBottomHeight", ctypes.c_int)
+                    ]
+
+
+    SetWindowCompositionAttribute = user32.SetWindowCompositionAttribute
+    SetWindowCompositionAttribute.argtypes = (HWND, WINDOWCOMPOSITIONATTRIBDATA)
+    SetWindowCompositionAttribute.restype = ctypes.c_int
+
+
+def ExtendFrameIntoClientArea(hwnd):
+    margins = MARGINS(-1, -1, -1, -1)
+    dwm.DwmExtendFrameIntoClientArea(hwnd, ctypes.byref(margins))
+
+
+def Win7Blur(hwnd, Acrylic):
+    if not Acrylic:
+        DWM_BB_ENABLE = 0x01
+        bb = DWM_BLURBEHIND()
+        bb.dwFlags = DWM_BB_ENABLE
+        bb.fEnable = 1
+        bb.hRgnBlur = 1
+        dwm.DwmEnableBlurBehindWindow(hwnd, ctypes.byref(bb))
+    else:
+        ExtendFrameIntoClientArea(hwnd)
+
+
+def HEXtoRGBAint(HEX: str):
+    alpha = HEX[7:]
+    blue = HEX[5:7]
+    green = HEX[3:5]
+    red = HEX[1:3]
+
+    gradient_color = alpha + blue + green + red
+    return int(gradient_color, base=16)
+
+
+def blur(hwnd, hex_color=False, acrylic=False, dark=False):
+    accent = ACCENTPOLICY()
+    accent.AccentState = 3  # Default window Blur #ACCENT_ENABLE_BLURBEHIND
+
+    gradient_color = 0
+
+    if hex_color:
+        gradient_color = HEXtoRGBAint(hex_color)
+        accent.AccentFlags = 2  # Window Blur With Accent Color #ACCENT_ENABLE_TRANSPARENTGRADIENT
+
+    if acrylic:
+        accent.AccentState = 4  # UWP but LAG #ACCENT_ENABLE_ACRYLICBLURBEHIND
+        if not hex_color:  # UWP without color is translucent
+            accent.AccentFlags = 2
+            gradient_color = HEXtoRGBAint('#12121240')  # placeholder color
+
+    accent.GradientColor = gradient_color
+
+    data = WINDOWCOMPOSITIONATTRIBDATA()
+    data.Attribute = 19  # WCA_ACCENT_POLICY
+    data.SizeOfData = ctypes.sizeof(accent)
+    data.Data = ctypes.cast(ctypes.pointer(accent), ctypes.POINTER(ctypes.c_int))
+
+    SetWindowCompositionAttribute(int(hwnd), data)
+
+    if dark:
+        data.Attribute = 26  # WCA_USEDARKMODECOLORS
+        SetWindowCompositionAttribute(int(hwnd), data)
+
+
+def BlurLinux(WID):  # may not work in all distros (working in Deepin)
+    import os
+
+    c = "xprop -f _KDE_NET_WM_BLUR_BEHIND_REGION 32c -set _KDE_NET_WM_BLUR_BEHIND_REGION 0 -id " + str(WID)
+    os.system(c)
+
+
+def GlobalBlur(hwnd, hex_color=False, acrylic=False, dark=False):
+    release = platform.release()
+    system = platform.system()
+
+    if system == 'Windows':
+        if release == 'Vista':
+            Win7Blur(hwnd, acrylic)
+        else:
+            release = int(float(release))
+            if release == 10 or release == 8 or release == 11:
+                blur(hwnd, hex_color, acrylic, dark)
+            else:
+                Win7Blur(hwnd, acrylic)
+
+    if system == 'Linux':
+        BlurLinux(hwnd)

ui/modules/handlers/buttons.py

@@ -0,0 +1,28 @@
+from ui.modules.updaters.page_index import update_page_text
+from ui.gui import Ui_MainWindow
+
+
+def on_back_button(ui: Ui_MainWindow):
+    ui.page_index.setText(str(int(ui.page_index.text()) - 1))
+    update_page_text(ui)
+
+
+def on_next_button(ui: Ui_MainWindow):
+    ui.page_index.setText(str(int(ui.page_index.text()) + 1))
+    update_page_text(ui)
+
+
+def on_back_button_press(ui: Ui_MainWindow):
+    ui.back_timer.start(10)
+
+
+def on_back_button_release(ui: Ui_MainWindow):
+    ui.back_timer.stop()
+
+
+def on_next_button_press(ui: Ui_MainWindow):
+    ui.next_timer.start(10)
+
+
+def on_next_button_release(ui: Ui_MainWindow):
+    ui.next_timer.stop()

ui/modules/initialize/handlers.py

@@ -0,0 +1,19 @@
+from ui.modules import validators
+from ui.modules.handlers import buttons
+from ui.gui import Ui_MainWindow
+
+
+def register_handlers(ui: Ui_MainWindow):
+    old_page_text_key_press_event = ui.page_text.keyPressEvent
+    ui.page_text.keyPressEvent = lambda event: validators.validate_page_text(ui, event, old_page_text_key_press_event)
+    old_page_index_key_press_event = ui.page_index.keyPressEvent
+    ui.page_index.keyPressEvent = lambda event: validators.validate_page_index(ui, event,
+                                                                               old_page_index_key_press_event)
+
+    ui.back_timer.timeout.connect(lambda: buttons.on_back_button(ui))
+    ui.next_timer.timeout.connect(lambda: buttons.on_next_button(ui))
+
+    ui.back_button.pressed.connect(lambda: buttons.on_back_button_press(ui))
+    ui.back_button.released.connect(lambda: buttons.on_back_button_release(ui))
+    ui.next_button.pressed.connect(lambda: buttons.on_next_button_press(ui))
+    ui.next_button.released.connect(lambda: buttons.on_next_button_release(ui))

ui/modules/initialize/setup_ui.py

@@ -0,0 +1,16 @@
+from ui.gui import Ui_MainWindow
+from ui.modules.blur import GlobalBlur
+from PyQt5.QtWidgets import QMainWindow
+from PyQt5.QtCore import QTimer
+from ui.modules.initialize import handlers
+
+
+def on_load(ui: Ui_MainWindow, MainWindow: QMainWindow):
+    ui.page_index.setText('0')
+    ui.page_index.setMaxLength(2_147_483_647)
+    ui.back_timer = QTimer()
+    ui.next_timer = QTimer()
+
+    GlobalBlur(MainWindow.winId(), acrylic=True)
+
+    handlers.register_handlers(ui)

ui/modules/styles.py

@@ -0,0 +1,582 @@
+centralwidget_b = """
+QWidget {
+    background-color: rgba(30, 30, 30, 0.1);
+    color: white;
+    font: 10pt "Segoe UI";
+}
+
+
+QScrollBar:vertical,
+QScrollBar:horizontal {
+    border: none;
+    background: rgba(30, 30, 30, 0);
+    width: 10px;
+    margin: 15px 0 15px 0;
+    border-radius: 0px;
+}
+
+QScrollBar::handle:vertical,
+QScrollBar::handle:horizontal {	
+    background-color: rgba(139, 139, 139, 0);
+    min-height: 30px;
+    border-radius: 5px;
+}
+
+QScrollBar::handle:vertical:hover,
+QScrollBar::handle:vertical:pressed,
+QScrollBar::handle:horizontal:hover,
+QScrollBar::handle:horizontal:pressed {	
+    background-color: rgba(149, 149, 149, 0);
+}
+
+QScrollBar::sub-line:vertical,
+QScrollBar::add-line:vertical,
+QScrollBar::up-arrow:vertical,
+QScrollBar::down-arrow:vertical {
+    height: 0px;
+}
+
+QScrollBar::up-arrow:vertical, QScrollBar::down-arrow:vertical,
+QScrollBar::add-page:vertical, QScrollBar::sub-page:vertical, 
+QScrollBar::up-arrow:horizontal, QScrollBar::down-arrow:horizontal,
+QScrollBar::add-page:horizontal, QScrollBar::sub-page:horizontal {
+    background: none;
+}
+
+
+QPushButton {
+    color: white;
+    border-width: 1px;
+    border-radius:6px;
+    border-style: solid;
+    border-color: rgba(48, 48, 48, 0.5);
+    background-color: rgba(44, 45, 46, 0.3);
+}
+QPushButton:hover {
+    border-width: 2px;
+    background-color: rgba(50, 50, 50, 0.7);
+}
+QPushButton:pressed {
+    background-color: rgba(38, 39, 40, 0.7);
+}
+QPushButton:disabled {
+    background-color: rgba(67, 67, 67, 0.7);
+    border-color: rgba(0, 0, 0, 0.7);
+}
+
+
+QLineEdit, QTextBrowser, QPlainTextEdit, QTextEdit {
+    border-width: 1px;
+    border-radius: 5px;
+    border-style: solid;
+    border-color: rgba(48, 48, 48);
+    background-color: rgba(36, 36, 36, 0);
+    font: 10pt "Segoe UI";
+}
+
+
+QListWidget {
+    border-width: 1px;
+    border-radius: 15px;
+    border-style: solid;
+    border-color: rgba(48, 48, 48);
+    padding: 10px;
+    background-color: rgba(100, 100, 100, 0);
+    font: 10pt "Segoe UI";
+}
+QListWidget:item {
+    background-color: rgba(36, 36, 36, 0);
+    selection-color: white;
+}
+QListWidget:item:hover {
+    background-color: rgba(50, 50, 50, 0);
+}
+QListWidget:item:selected {
+    background-color: rgba(119, 119, 119, 1);
+}
+
+
+QComboBox
+{
+    border-width: 1px;
+    border-radius:6px;
+    border-style: solid;
+    border-color: rgba(48, 48, 48);
+    background-color: rgba(44, 45, 46, 0);
+    color: white;
+}
+
+QComboBox::disabled
+{
+    background-color: rgba(67, 67, 67, 0);
+    color: #656565;
+    border-color: rgba(67, 67, 67);
+}
+
+QComboBox:hover
+{
+    background-color: rgba(50, 50, 50, 0);
+}
+
+QComboBox:on
+{
+    background-color: rgba(67, 67, 67, 0);
+}
+
+QComboBox QAbstractItemView
+{
+    background-color: rgba(67, 67, 67, 0);
+    color: #ffffff;
+    selection-background-color: rgba(119, 119, 119, 0);
+    selection-color: white;
+    outline: 0;
+}
+
+QComboBox::drop-down
+{
+    subcontrol-origin: padding;
+    subcontrol-position: top right;
+    border-radius: 6px; 
+}
+
+
+QTabBar::tab
+{
+    background-color: rgba(44, 45, 46, 0);
+    color: #ffffff;
+    border-style: solid;
+    border-width: 1px;
+    border-top-left-radius: 3px;
+    border-top-right-radius: 3px;
+    border-color: rgba(48, 48, 48);
+    padding: 5px;
+}
+
+QTabBar::tab:disabled
+{
+    background-color: rgba(101, 101, 101, 0);
+    color: #656565;
+}
+
+QTabWidget::pane 
+{
+    background-color: rgba(160, 160, 160, 0);
+    color: #ffffff;
+    border: 3px solid;
+    border-radius: 15px;
+    border-color: rgba(28, 28, 28);
+}
+
+QTabBar::tab:selected
+{
+    background-color: rgba(38, 39, 40, 0);
+    color: #ffffff;
+    border-style: solid;
+    border-width: 1px;
+    border-top-left-radius: 3px;
+    border-top-right-radius: 3px;
+    border-color: rgba(48, 48, 48);
+    padding: 5px;
+}
+
+QTabBar::tab:selected:disabled
+{
+    background-color: rgba(64, 64, 64, 0);
+    color: #656565;
+}
+
+QTabBar::tab:!selected 
+{
+    background-color: rgba(38, 38, 38, 0);
+}
+
+QTabBar::tab:!selected:hover 
+{
+    background-color: rgba(50, 50, 50, 0);
+}
+
+QTabBar::tab:top:!selected 
+{
+    margin-top: 3px;
+}
+
+QTabBar::tab:bottom:!selected 
+{
+    margin-bottom: 3px;
+}
+
+QTabBar::tab:top, QTabBar::tab:bottom 
+{
+    min-width: 8ex;
+    margin-right: -1px;
+    padding: 5px 10px 5px 10px;
+}
+
+QTabBar::tab:top:selected 
+{
+    border-bottom-color: none;
+}
+
+QTabBar::tab:bottom:selected 
+{
+    border-top-color: none;
+}
+
+QTabBar::tab:top:last, QTabBar::tab:bottom:last,
+QTabBar::tab:top:only-one, QTabBar::tab:bottom:only-one 
+{
+    margin-right: 0;
+}
+
+QTabBar::tab:left:!selected 
+{
+    margin-right: 3px;
+}
+
+QTabBar::tab:right:!selected
+{
+    margin-left: 3px;
+}
+
+QTabBar::tab:left, QTabBar::tab:right 
+{
+    min-height: 8ex;
+    margin-bottom: -1px;
+    padding: 10px 5px 10px 5px;
+}
+
+QTabBar::tab:left:selected 
+{
+    border-left-color: none;
+}
+
+QTabBar::tab:right:selected 
+{
+    border-right-color: none;
+}
+
+QTabBar::tab:left:last, QTabBar::tab:right:last,
+QTabBar::tab:left:only-one, QTabBar::tab:right:only-one 
+{
+    margin-bottom: 0;
+}
+
+QSpinBox {
+    border-width: 1px;
+    border-radius: 5px;
+    border-style: solid;
+    border-color: rgba(48, 48, 48);
+    background-color: rgba(36, 36, 36, 0);
+    font: 10pt "Segoe UI";
+}
+QSpinBox::up-button {
+    border: none;
+    background: none;
+}
+QSpinBox::down-button {
+    border: none;
+    background: none;
+}
+
+QToolBox::tab {
+    border-style: solid;
+    border-width: 1px;
+    border-radius: 5px;
+    border-color: rgba(48, 48, 48, 0);
+}
+"""
+
+menupage_b = """
+QListWidget {
+    border-width: 0px;
+    border-radius: 0px;
+    border: none;
+    padding: 0px;
+    background-color: rgba(36, 36, 36, 0);
+    font: 10pt "Segoe UI";
+}
+QListWidget:item {
+    padding-left: 10px;
+    height: 60px;
+    background-color: rgba(25, 25, 25, 0);
+    selection-color: rgba(255, 255, 255);
+}
+QListWidget:item:hover {
+    background-color: rgba(50, 50, 50, 0);
+}
+QListWidget:item:selected {
+    background-color: rgba(38, 39, 40, 0);
+}
+"""
+
+centralwidget_g = """
+QWidget {
+    background-color: rgb(30, 30, 30);
+    color: rgb(255, 255, 255);
+    font: 10pt "Segoe UI";
+}
+QScrollBar:vertical,
+QScrollBar:horizontal {
+    border: none;
+    background: rgb(30, 30, 30);
+    width: 10px;
+    margin: 15px 0 15px 0;
+    border-radius: 0px;
+}
+QScrollBar::handle:vertical,
+QScrollBar::handle:horizontal {	
+    background-color: rgb(139, 139, 139);
+    min-height: 30px;
+    border-radius: 5px;
+}
+QScrollBar::handle:vertical:hover,
+QScrollBar::handle:vertical:pressed,
+QScrollBar::handle:horizontal:hover,
+QScrollBar::handle:horizontal:pressed {	
+    background-color: rgb(149, 149, 149);
+}
+QScrollBar::sub-line:vertical,
+QScrollBar::add-line:vertical,
+QScrollBar::up-arrow:vertical,
+QScrollBar::down-arrow:vertical {
+    height: 0px;
+}
+QScrollBar::up-arrow:vertical, QScrollBar::down-arrow:vertical,
+QScrollBar::add-page:vertical, QScrollBar::sub-page:vertical, 
+QScrollBar::up-arrow:horizontal, QScrollBar::down-arrow:horizontal,
+QScrollBar::add-page:horizontal, QScrollBar::sub-page:horizontal {
+    background: none;
+}
+QPushButton {
+    color: white;
+    border-width: 1px;
+    border-radius:6px;
+    border-style: solid;
+    border-color: #303030;
+    background-color: #2c2d2e;
+}
+QPushButton:hover {
+    border-width: 2px;
+    background-color: #323232;
+}
+QPushButton:pressed {
+    background-color: #262728;
+}
+QPushButton:disabled {
+    background-color: #434343;
+    border-color: #0000;
+}
+QLineEdit, QTextBrowser, QPlainTextEdit, QTextEdit {
+    border-width: 1px;
+    border-radius: 5px;
+    border-style: solid;
+    border-color: #303030;
+    background-color: #242424;
+    font: 10pt "Segoe UI";
+}
+QListWidget {
+    border-width: 1px;
+    border-radius: 15px;
+    border-style: solid;
+    border-color: #303030;
+    padding: 10px;
+    background-color: #242424;
+    font: 10pt "Segoe UI";
+}
+QListWidget:item {
+    background-color: #242424;
+    selection-color: white;
+}
+QListWidget:item:hover {
+    background-color: #323232;
+}
+QListWidget:item:selected {
+    background-color: #777777;
+}
+QComboBox
+{
+    border-width: 1px;
+    border-radius:6px;
+    border-style: solid;
+    border-color: #303030;
+    background-color: #2c2d2e;
+    color: #ffffff;
+}
+QComboBox::disabled
+{
+    background-color: #434343;
+    color: #656565;
+    border-color: #434343;
+}
+QComboBox:hover
+{
+    background-color: #323232;
+}
+QComboBox:on
+{
+    background-color: #434343;
+}
+QComboBox QAbstractItemView
+{
+    background-color: #434343;
+    color: #ffffff;
+    selection-background-color: #777777;
+    selection-color: white;
+    outline: 0;
+}
+QComboBox::drop-down
+{
+    subcontrol-origin: padding;
+    subcontrol-position: top right;
+    border-radius: 6px; 
+}
+QTabBar::tab
+{
+    background-color: #2c2d2e;
+    color: #ffffff;
+    border-style: solid;
+    border-width: 1px;
+    border-top-left-radius: 3px;
+    border-top-right-radius: 3px;
+    border-color: #303030;
+    padding: 5px;
+}
+QTabBar::tab:disabled
+{
+    background-color: #656565;
+    color: #656565;
+}
+QTabWidget::pane 
+{
+    background-color: #a0a0a0;
+    color: #ffffff;
+    border: 3px solid;
+    border-radius: 15px;
+    border-color: #1c1c1c;
+}
+QTabBar::tab:selected
+{
+    background-color: #262728;
+    color: #ffffff;
+    border-style: solid;
+    border-width: 1px;
+    border-top-left-radius: 3px;
+    border-top-right-radius: 3px;
+    border-color: #303030;
+    padding: 5px;
+}
+QTabBar::tab:selected:disabled
+{
+    background-color: #404040;
+    color: #656565;
+}
+QTabBar::tab:!selected 
+{
+    background-color: #262626;
+}
+QTabBar::tab:!selected:hover 
+{
+    background-color: #323232;
+}
+QTabBar::tab:top:!selected 
+{
+    margin-top: 3px;
+}
+QTabBar::tab:bottom:!selected 
+{
+    margin-bottom: 3px;
+}
+QTabBar::tab:top, QTabBar::tab:bottom 
+{
+    min-width: 8ex;
+    margin-right: -1px;
+    padding: 5px 10px 5px 10px;
+}
+QTabBar::tab:top:selected 
+{
+    border-bottom-color: none;
+}
+QTabBar::tab:bottom:selected 
+{
+    border-top-color: none;
+}
+QTabBar::tab:top:last, QTabBar::tab:bottom:last,
+QTabBar::tab:top:only-one, QTabBar::tab:bottom:only-one 
+{
+    margin-right: 0;
+}
+QTabBar::tab:left:!selected 
+{
+    margin-right: 3px;
+}
+QTabBar::tab:right:!selected
+{
+    margin-left: 3px;
+}
+QTabBar::tab:left, QTabBar::tab:right 
+{
+    min-height: 8ex;
+    margin-bottom: -1px;
+    padding: 10px 5px 10px 5px;
+}
+QTabBar::tab:left:selected 
+{
+    border-left-color: none;
+}
+QTabBar::tab:right:selected 
+{
+    border-right-color: none;
+}
+QTabBar::tab:left:last, QTabBar::tab:right:last,
+QTabBar::tab:left:only-one, QTabBar::tab:right:only-one 
+{
+    margin-bottom: 0;
+}
+
+QSpinBox {
+    border-width: 1px;
+    border-radius: 5px;
+    border-style: solid;
+    border-color: #303030;
+    background-color: #242424;
+    font: 10pt "Segoe UI";
+}
+QSpinBox::up-button {
+    border: none;
+    background: none;
+}
+QSpinBox::down-button {
+    border: none;
+    background: none;
+}
+
+QToolBox::tab {
+    border-style: solid;
+    border-width: 1px;
+    border-radius: 5px;
+    border-color: #303030;
+}
+"""
+
+menupage_g = """
+QListWidget {
+    border-width: 0px;
+    border-radius: 0px;
+    border: none;
+    padding: 0px;
+    background-color: #242424;
+    font: 10pt "Segoe UI";
+}
+QListWidget:item {
+    padding-left: 10px;
+    height: 60px;
+    background-color: #191919;
+    selection-color: rgba(255, 255, 255);
+}
+QListWidget:item:hover {
+    background-color: #323232;
+}
+QListWidget:item:selected {
+    background-color: #262728;
+}
+"""

ui/modules/updaters/page_index.py

@@ -0,0 +1,13 @@
+from modules.generator.pages import Page
+from ui.gui import Ui_MainWindow
+
+
+def update_page_text(ui: Ui_MainWindow):
+    if ui.page_index.text() == str():
+        ui.page_text.setPlainText('')
+        return
+
+    try:
+        ui.page_text.setPlainText(Page.from_index(int(ui.page_index.text())))
+    except:
+        ui.page_text.setPlainText('Something went wrong, change index or text here.')

ui/modules/updaters/page_text.py

@@ -0,0 +1,6 @@
+from modules.generator.pages import Index
+from ui.gui import Ui_MainWindow
+
+
+def update_page_index(ui: Ui_MainWindow):
+    ui.page_index.setText(str(Index.from_page(ui.page_text.toPlainText())))

ui/modules/validators/__init__.py

@@ -0,0 +1,2 @@
+from .page_text import *
+from .page_index import *

ui/modules/validators/page_index.py

@@ -0,0 +1,14 @@
+from ui.modules.updaters.page_index import update_page_text
+from ui.gui import Ui_MainWindow
+from PyQt5 import QtGui
+
+
+def validate_page_index(ui: Ui_MainWindow, event: QtGui.QKeyEvent, old_event):
+    old_event(event)
+    for char in ui.page_index.text():
+        if char not in '0123456789':
+            ui.page_index.setText(''.join(c for c in ui.page_index.text() if c in '0123456789'))
+            ui.page_index.setCursorPosition(QtGui.QTextCursor.End)
+            break
+
+    update_page_text(ui)

ui/modules/validators/page_text.py

@@ -0,0 +1,15 @@
+from ui.modules.updaters.page_text import update_page_index
+from modules.config import charset
+from ui.gui import Ui_MainWindow
+from PyQt5 import QtGui
+
+
+def validate_page_text(ui: Ui_MainWindow, event: QtGui.QKeyEvent, old_event):
+    old_event(event)
+    for char in ui.page_text.toPlainText():
+        if char not in charset:
+            ui.page_text.setPlainText(''.join(c for c in ui.page_text.toPlainText() if c in charset))
+            ui.page_text.moveCursor(QtGui.QTextCursor.End)
+            break
+
+    update_page_index(ui)