Linux: handle dark system themes nicely

yuzu's default theme doesn't specify everything, which is fine for
windows, but in linux anything unspecified is set to the users theme.

Symptoms of this are that a linux user with a dark theme won't think
to change the theme to a dark theme when first using yuzu

Idea here is to try and support arbitrary themes on linux.

preliminary work on a "default_dark" theme, used only as overlay
for any themes that are measured to be dark mode.

Other work done:

FreeDesktop standard icon names:
plus -> list-add
delete refresh, we use view-refresh

remove duplicated icons for qdarkstyle_midnight_blue
referencing icon aliases in the qrc files is the way to go

Note:
Dynamic style changing doesn't appear to work with AppImage

.reuse/dep5

@@ -41,20 +41,18 @@ Files: dist/qt_themes/*/icons/16x16/connected.png
        dist/qt_themes/*/icons/48x48/sd_card.png
        dist/qt_themes/*/icons/48x48/star.png
        dist/qt_themes/*/icons/256x256/plus_folder.png
-       dist/qt_themes/colorful/icons/48x48/plus.png
+       dist/qt_themes/colorful/icons/48x48/list-add.png
        dist/qt_themes/default/icons/16x16/checked.png
        dist/qt_themes/default/icons/16x16/failed.png
 Copyright: https://icons8.com
 License: CC-BY-ND-3.0
 
-Files: dist/qt_themes/*/icons/16x16/refresh.png
+Files: dist/qt_themes/*/icons/16x16/view-refresh.png
-       dist/qt_themes/*/icons/16x16/view-refresh.png
 Copyright: Google, Inc.
 License: Apache-2.0
 
-Files: dist/qt_themes/default/icons/48x48/plus.png
+Files: dist/qt_themes/default/icons/48x48/list-add.png
-       dist/qt_themes/qdarkstyle/icons/48x48/plus.png
+       dist/qt_themes/qdarkstyle/icons/48x48/list-add.png
-       dist/qt_themes/qdarkstyle_midnight_blue/icons/48x48/plus.png
 Copyright: BreadFish64
 License: CC0-1.0
 

dist/qt_themes/colorful/style.qrc

@@ -13,7 +13,7 @@ SPDX-License-Identifier: GPL-2.0-or-later
         <file alias="48x48/bad_folder.png">icons/48x48/bad_folder.png</file>
         <file alias="48x48/chip.png">icons/48x48/chip.png</file>
         <file alias="48x48/folder.png">icons/48x48/folder.png</file>
-        <file alias="48x48/plus.png">icons/48x48/plus.png</file>
+        <file alias="48x48/list-add.png">icons/48x48/list-add.png</file>
         <file alias="48x48/sd_card.png">icons/48x48/sd_card.png</file>
         <file alias="48x48/star.png">icons/48x48/star.png</file>
         <file alias="256x256/plus_folder.png">icons/256x256/plus_folder.png</file>

dist/qt_themes/colorful_dark/icons/index.theme

@@ -3,6 +3,6 @@ Name=colorful_dark
 Comment=Colorful theme (Dark style)
 Inherits=colorful
 Directories=16x16
- 
+
 [16x16]
 Size=16

dist/qt_themes/colorful_dark/style.qrc

@@ -15,7 +15,7 @@ SPDX-License-Identifier: GPL-2.0-or-later
         <file alias="48x48/chip.png">../colorful/icons/48x48/chip.png</file>
         <file alias="48x48/folder.png">../colorful/icons/48x48/folder.png</file>
         <file alias="48x48/no_avatar.png">../qdarkstyle/icons/48x48/no_avatar.png</file>
-        <file alias="48x48/plus.png">../colorful/icons/48x48/plus.png</file>
+        <file alias="48x48/list-add.png">../colorful/icons/48x48/list-add.png</file>
         <file alias="48x48/sd_card.png">../colorful/icons/48x48/sd_card.png</file>
         <file alias="256x256/plus_folder.png">../colorful/icons/256x256/plus_folder.png</file>
     </qresource>

dist/qt_themes/colorful_midnight_blue/style.qrc

@@ -11,7 +11,7 @@ SPDX-License-Identifier: GPL-2.0-or-later
         <file alias="48x48/bad_folder.png">../colorful/icons/48x48/bad_folder.png</file>
         <file alias="48x48/chip.png">../colorful/icons/48x48/chip.png</file>
         <file alias="48x48/folder.png">../colorful/icons/48x48/folder.png</file>
-        <file alias="48x48/plus.png">../colorful/icons/48x48/plus.png</file>
+        <file alias="48x48/list-add.png">../colorful/icons/48x48/list-add.png</file>
         <file alias="48x48/sd_card.png">../colorful/icons/48x48/sd_card.png</file>
         <file alias="256x256/plus_folder.png">../colorful/icons/256x256/plus_folder.png</file>
     </qresource>

dist/qt_themes/default/default.qrc

@@ -17,7 +17,7 @@ SPDX-License-Identifier: GPL-2.0-or-later
         <file alias="48x48/chip.png">icons/48x48/chip.png</file>
         <file alias="48x48/folder.png">icons/48x48/folder.png</file>
         <file alias="48x48/no_avatar.png">icons/48x48/no_avatar.png</file>
-        <file alias="48x48/plus.png">icons/48x48/plus.png</file>
+        <file alias="48x48/list-add.png">icons/48x48/list-add.png</file>
         <file alias="48x48/sd_card.png">icons/48x48/sd_card.png</file>
         <file alias="48x48/star.png">icons/48x48/star.png</file>
         <file alias="256x256/yuzu.png">icons/256x256/yuzu.png</file>

dist/qt_themes/default_dark/icons/index.theme

@@ -0,0 +1,8 @@
+[Icon Theme]
+Name=default_dark
+Comment=Colorful theme (Dark style)
+Inherits=colorful
+Directories=16x16
+
+[16x16]
+Size=16

dist/qt_themes/default_dark/style.qrc

@@ -0,0 +1,25 @@
+<!--
+SPDX-FileCopyrightText: 2022 yuzu Emulator Project
+SPDX-License-Identifier: GPL-2.0-or-later
+-->
+<RCC>
+    <qresource prefix="icons/default_dark">
+        <file alias="16x16/connected.png">../colorful/icons/16x16/connected.png</file>
+        <file alias="16x16/connected_notification.png">../colorful/icons/16x16/connected_notification.png</file>
+        <file alias="16x16/disconnected.png">../colorful/icons/16x16/disconnected.png</file>
+        <file alias="index.theme">icons/index.theme</file>
+        <file alias="16x16/lock.png">../colorful_dark/icons/16x16/lock.png</file>
+        <file alias="16x16/view-refresh.png">../colorful_dark/icons/16x16/view-refresh.png</file>
+        <file alias="48x48/bad_folder.png">../colorful/icons/48x48/bad_folder.png</file>
+        <file alias="48x48/chip.png">../colorful/icons/48x48/chip.png</file>
+        <file alias="48x48/folder.png">../colorful/icons/48x48/folder.png</file>
+        <file alias="48x48/no_avatar.png">../qdarkstyle/icons/48x48/no_avatar.png</file>
+        <file alias="48x48/list-add.png">../colorful/icons/48x48/list-add.png</file>
+        <file alias="48x48/sd_card.png">../colorful/icons/48x48/sd_card.png</file>
+        <file alias="256x256/plus_folder.png">../colorful/icons/256x256/plus_folder.png</file>
+    </qresource>
+
+    <qresource prefix="default_dark">
+        <file>style.qss</file>
+    </qresource>
+</RCC>

dist/qt_themes/default_dark/style.qss

@@ -0,0 +1,689 @@
+/*
+* SPDX-FileCopyrightText: 2018 yuzu Emulator Project
+* SPDX-License-Identifier: GPL-2.0-or-later
+*/
+QAbstractSpinBox {
+    min-height: 19px;
+}
+
+QPushButton#TogglableStatusBarButton {
+    color: #959595;
+    border: 1px solid transparent;
+    background-color: transparent;
+    padding: 0px 3px 0px 3px;
+    text-align: center;
+}
+
+/*
+QPushButton#TogglableStatusBarButton:checked {
+    color: #000000;
+}
+*/
+
+QPushButton#TogglableStatusBarButton:hover {
+    border: 1px solid #76797C;
+}
+
+QPushButton#RendererStatusBarButton {
+    color: #656565;
+    border: 1px solid transparent;
+    background-color: transparent;
+    padding: 0px 3px 0px 3px;
+    text-align: center;
+}
+
+QPushButton#RendererStatusBarButton:hover {
+    border: 1px solid #76797C;
+}
+
+QPushButton#RendererStatusBarButton:checked {
+    color: #e85c00;
+}
+
+QPushButton#RendererStatusBarButton:!checked {
+    color: #0066ff;
+}
+
+QPushButton#GPUStatusBarButton {
+    color: #656565;
+    border: 1px solid transparent;
+    background-color: transparent;
+    padding: 0px 3px 0px 3px;
+    text-align: center;
+}
+
+QPushButton#GPUStatusBarButton:hover {
+    border: 1px solid #76797C;
+}
+
+QPushButton#GPUStatusBarButton:checked {
+    color: #b06020;
+}
+
+QPushButton#GPUStatusBarButton:!checked {
+    color: #109010;
+}
+
+QPushButton#DockingStatusBarButton {
+    min-width: 0px;
+    /*color: #000000;*/
+    border: 1px solid transparent;
+    background-color: transparent;
+    padding: 0px 3px 0px 3px;
+    text-align: center;
+}
+
+QPushButton#DockingStatusBarButton:hover {
+    border: 1px solid #76797C;
+}
+
+QPushButton#buttonRefreshDevices {
+    min-width: 21px;
+    min-height: 21px;
+    max-width: 21px;
+    max-height: 21px;
+}
+
+QWidget#bottomPerGameInput,
+QWidget#topControllerApplet,
+QWidget#bottomControllerApplet,
+QGroupBox#groupPlayer1Connected:checked,
+QGroupBox#groupPlayer2Connected:checked,
+QGroupBox#groupPlayer3Connected:checked,
+QGroupBox#groupPlayer4Connected:checked,
+QGroupBox#groupPlayer5Connected:checked,
+QGroupBox#groupPlayer6Connected:checked,
+QGroupBox#groupPlayer7Connected:checked,
+QGroupBox#groupPlayer8Connected:checked {
+    background-color: #f5f5f5;
+}
+
+QWidget#topControllerApplet {
+    border-bottom: 1px solid #828790
+}
+
+QWidget#bottomPerGameInput,
+QWidget#bottomControllerApplet {
+    border-top: 1px solid #828790
+}
+
+QWidget#topPerGameInput,
+QWidget#middleControllerApplet {
+    background-color: #fff;
+}
+
+QWidget#topPerGameInput QComboBox,
+QWidget#middleControllerApplet QComboBox {
+    width: 120px;
+}
+
+QWidget#connectedControllers {
+    background: transparent;
+}
+
+QWidget#playersSupported,
+QWidget#controllersSupported,
+QWidget#controllerSupported1,
+QWidget#controllerSupported2,
+QWidget#controllerSupported3,
+QWidget#controllerSupported4,
+QWidget#controllerSupported5,
+QWidget#controllerSupported6 {
+    border: none;
+    background: transparent;
+}
+
+QGroupBox#groupPlayer1Connected,
+QGroupBox#groupPlayer2Connected,
+QGroupBox#groupPlayer3Connected,
+QGroupBox#groupPlayer4Connected,
+QGroupBox#groupPlayer5Connected,
+QGroupBox#groupPlayer6Connected,
+QGroupBox#groupPlayer7Connected,
+QGroupBox#groupPlayer8Connected {
+    border: 1px solid #828790;
+    border-radius: 3px;
+    padding: 0px;
+    min-height: 98px;
+    max-height: 98px;
+}
+
+QGroupBox#groupPlayer1Connected:unchecked,
+QGroupBox#groupPlayer2Connected:unchecked,
+QGroupBox#groupPlayer3Connected:unchecked,
+QGroupBox#groupPlayer4Connected:unchecked,
+QGroupBox#groupPlayer5Connected:unchecked,
+QGroupBox#groupPlayer6Connected:unchecked,
+QGroupBox#groupPlayer7Connected:unchecked,
+QGroupBox#groupPlayer8Connected:unchecked {
+    border: 1px solid #d9d9d9;
+}
+
+QGroupBox#groupPlayer1Connected::title,
+QGroupBox#groupPlayer2Connected::title,
+QGroupBox#groupPlayer3Connected::title,
+QGroupBox#groupPlayer4Connected::title,
+QGroupBox#groupPlayer5Connected::title,
+QGroupBox#groupPlayer6Connected::title,
+QGroupBox#groupPlayer7Connected::title,
+QGroupBox#groupPlayer8Connected::title {
+    subcontrol-origin: margin;
+    subcontrol-position: top left;
+    padding-left: 0px;
+    padding-right: 0px;
+    padding-top: 1px;
+    margin-left: 0px;
+    margin-right: -4px;
+    margin-bottom: 4px;
+}
+
+QCheckBox#checkboxPlayer1Connected,
+QCheckBox#checkboxPlayer2Connected,
+QCheckBox#checkboxPlayer3Connected,
+QCheckBox#checkboxPlayer4Connected,
+QCheckBox#checkboxPlayer5Connected,
+QCheckBox#checkboxPlayer6Connected,
+QCheckBox#checkboxPlayer7Connected,
+QCheckBox#checkboxPlayer8Connected {
+    spacing: 0px;
+}
+
+QWidget#Player1LEDs QCheckBox,
+QWidget#Player2LEDs QCheckBox,
+QWidget#Player3LEDs QCheckBox,
+QWidget#Player4LEDs QCheckBox,
+QWidget#Player5LEDs QCheckBox,
+QWidget#Player6LEDs QCheckBox,
+QWidget#Player7LEDs QCheckBox,
+QWidget#Player8LEDs QCheckBox {
+    spacing: 0px;
+}
+
+QWidget#Player1LEDs QCheckBox::indicator,
+QWidget#Player2LEDs QCheckBox::indicator,
+QWidget#Player3LEDs QCheckBox::indicator,
+QWidget#Player4LEDs QCheckBox::indicator,
+QWidget#Player5LEDs QCheckBox::indicator,
+QWidget#Player6LEDs QCheckBox::indicator,
+QWidget#Player7LEDs QCheckBox::indicator,
+QWidget#Player8LEDs QCheckBox::indicator {
+    width: 6px;
+    height: 6px;
+    margin-left: 0px;
+}
+
+QWidget#bottomPerGameInput QCheckBox#checkboxPlayer1Connected::indicator,
+QWidget#bottomPerGameInput QCheckBox#checkboxPlayer2Connected::indicator,
+QWidget#bottomPerGameInput QCheckBox#checkboxPlayer3Connected::indicator,
+QWidget#bottomPerGameInput QCheckBox#checkboxPlayer4Connected::indicator,
+QWidget#bottomPerGameInput QCheckBox#checkboxPlayer5Connected::indicator,
+QWidget#bottomPerGameInput QCheckBox#checkboxPlayer6Connected::indicator,
+QWidget#bottomPerGameInput QCheckBox#checkboxPlayer7Connected::indicator,
+QWidget#bottomPerGameInput QCheckBox#checkboxPlayer8Connected::indicator {
+    width: 12px;
+    height: 12px;
+}
+
+QCheckBox#checkboxPlayer1Connected::indicator,
+QCheckBox#checkboxPlayer2Connected::indicator,
+QCheckBox#checkboxPlayer3Connected::indicator,
+QCheckBox#checkboxPlayer4Connected::indicator,
+QCheckBox#checkboxPlayer5Connected::indicator,
+QCheckBox#checkboxPlayer6Connected::indicator,
+QCheckBox#checkboxPlayer7Connected::indicator,
+QCheckBox#checkboxPlayer8Connected::indicator {
+    width: 14px;
+    height: 14px;
+}
+
+QGroupBox#groupPlayer1Connected::indicator,
+QGroupBox#groupPlayer2Connected::indicator,
+QGroupBox#groupPlayer3Connected::indicator,
+QGroupBox#groupPlayer4Connected::indicator,
+QGroupBox#groupPlayer5Connected::indicator,
+QGroupBox#groupPlayer6Connected::indicator,
+QGroupBox#groupPlayer7Connected::indicator,
+QGroupBox#groupPlayer8Connected::indicator {
+    width: 16px;
+    height: 16px;
+}
+
+QWidget#Player1LEDs QCheckBox::indicator:checked,
+QWidget#Player2LEDs QCheckBox::indicator:checked,
+QWidget#Player3LEDs QCheckBox::indicator:checked,
+QWidget#Player4LEDs QCheckBox::indicator:checked,
+QWidget#Player5LEDs QCheckBox::indicator:checked,
+QWidget#Player6LEDs QCheckBox::indicator:checked,
+QWidget#Player7LEDs QCheckBox::indicator:checked,
+QWidget#Player8LEDs QCheckBox::indicator:checked,
+QGroupBox#groupPlayer1Connected::indicator:checked,
+QGroupBox#groupPlayer2Connected::indicator:checked,
+QGroupBox#groupPlayer3Connected::indicator:checked,
+QGroupBox#groupPlayer4Connected::indicator:checked,
+QGroupBox#groupPlayer5Connected::indicator:checked,
+QGroupBox#groupPlayer6Connected::indicator:checked,
+QGroupBox#groupPlayer7Connected::indicator:checked,
+QGroupBox#groupPlayer8Connected::indicator:checked,
+QCheckBox#checkboxPlayer1Connected::indicator:checked,
+QCheckBox#checkboxPlayer2Connected::indicator:checked,
+QCheckBox#checkboxPlayer3Connected::indicator:checked,
+QCheckBox#checkboxPlayer4Connected::indicator:checked,
+QCheckBox#checkboxPlayer5Connected::indicator:checked,
+QCheckBox#checkboxPlayer6Connected::indicator:checked,
+QCheckBox#checkboxPlayer7Connected::indicator:checked,
+QCheckBox#checkboxPlayer8Connected::indicator:checked,
+QGroupBox#groupConnectedController::indicator:checked {
+    border-radius: 2px;
+    border: 1px solid #929192;
+    background: #39ff14;
+    image: none;
+}
+
+QWidget#Player1LEDs QCheckBox::indicator:unchecked,
+QWidget#Player2LEDs QCheckBox::indicator:unchecked,
+QWidget#Player3LEDs QCheckBox::indicator:unchecked,
+QWidget#Player4LEDs QCheckBox::indicator:unchecked,
+QWidget#Player5LEDs QCheckBox::indicator:unchecked,
+QWidget#Player6LEDs QCheckBox::indicator:unchecked,
+QWidget#Player7LEDs QCheckBox::indicator:unchecked,
+QWidget#Player8LEDs QCheckBox::indicator:unchecked,
+QGroupBox#groupPlayer1Connected::indicator:unchecked,
+QGroupBox#groupPlayer2Connected::indicator:unchecked,
+QGroupBox#groupPlayer3Connected::indicator:unchecked,
+QGroupBox#groupPlayer4Connected::indicator:unchecked,
+QGroupBox#groupPlayer5Connected::indicator:unchecked,
+QGroupBox#groupPlayer6Connected::indicator:unchecked,
+QGroupBox#groupPlayer7Connected::indicator:unchecked,
+QGroupBox#groupPlayer8Connected::indicator:unchecked,
+QCheckBox#checkboxPlayer1Connected::indicator:unchecked,
+QCheckBox#checkboxPlayer2Connected::indicator:unchecked,
+QCheckBox#checkboxPlayer3Connected::indicator:unchecked,
+QCheckBox#checkboxPlayer4Connected::indicator:unchecked,
+QCheckBox#checkboxPlayer5Connected::indicator:unchecked,
+QCheckBox#checkboxPlayer6Connected::indicator:unchecked,
+QCheckBox#checkboxPlayer7Connected::indicator:unchecked,
+QCheckBox#checkboxPlayer8Connected::indicator:unchecked,
+QGroupBox#groupConnectedController::indicator:unchecked {
+    border-radius: 2px;
+    border: 1px solid #929192;
+    background: transparent;
+    image: none;
+}
+
+QWidget#controllerPlayer1,
+QWidget#controllerPlayer2,
+QWidget#controllerPlayer3,
+QWidget#controllerPlayer4,
+QWidget#controllerPlayer5,
+QWidget#controllerPlayer6,
+QWidget#controllerPlayer7,
+QWidget#controllerPlayer8 {
+    background: transparent;
+}
+
+QDialog#QtSoftwareKeyboardDialog,
+QStackedWidget#topOSK {
+    background: rgba(51, 51, 51, .9);
+}
+
+
+QDialog#OverlayDialog,
+QStackedWidget#stackedDialog {
+    background: rgba(51, 51, 51, .7);
+}
+
+QWidget#boxOSK,
+QWidget#lineOSK,
+QWidget#richDialog,
+QWidget#lineDialog {
+    background: transparent;
+}
+
+QStackedWidget#bottomOSK,
+QWidget#contentDialog,
+QWidget#contentRichDialog {
+    background: rgba(240, 240, 240, 1);
+}
+
+QWidget#contentDialog,
+QWidget#contentRichDialog {
+    margin: 5px;
+    border-radius: 6px;
+}
+
+QWidget#buttonsDialog,
+QWidget#buttonsRichDialog {
+    margin: 5px;
+    border-top: 2px solid rgba(44, 44, 44, 1);
+}
+
+QWidget#legendOSKnum {
+    border-top: 1px solid rgba(44, 44, 44, 1);
+}
+
+QStackedWidget#stackedDialog QTextBrowser QScrollBar::vertical {
+    background: #cdcdcd;
+    width: 15px;
+    margin: 15px 3px 15px 3px;
+    border: 1px transparent;
+    border-radius: 4px;
+}
+
+QStackedWidget#stackedDialog QTextBrowser QScrollBar::horizoncal {
+    background: #cdcdcd;
+    height: 15px;
+    margin: 3px 15px 3px 15px;
+    border: 1px transparent;
+    border-radius: 4px;
+}
+
+QStackedWidget#stackedDialog QTextBrowser QScrollBar::handle {
+    background: #fff;
+    border-radius: 4px;
+    min-height: 5px;
+    min-width: 5px;
+}
+
+QStackedWidget#stackedDialog QTextBrowser QScrollBar::add-line,
+QStackedWidget#stackedDialog QTextBrowser QScrollBar::sub-line,
+QStackedWidget#stackedDialog QTextBrowser QScrollBar::add-page,
+QStackedWidget#stackedDialog QTextBrowser QScrollBar::sub-page {
+    background: none;
+}
+
+QWidget#inputOSK {
+    border-bottom: 3px solid rgba(255, 255, 255, .9);
+}
+
+QWidget#inputOSK QLineEdit {
+    background: transparent;
+    border: none;
+    color: #ccc;
+}
+
+QWidget#inputBoxOSK {
+    border: 2px solid rgba(255, 255, 255, .9);
+}
+
+QWidget#inputBoxOSK QTextEdit {
+    background: transparent;
+    border: none;
+    color: #ccc;
+}
+
+QWidget#richDialog QTextBrowser {
+    background: transparent;
+    border: none;
+    padding: 35px 65px;
+}
+
+
+QWidget#lineOSK QLabel#label_header {
+    color: #f0f0f0;
+}
+
+QWidget#lineOSK QLabel#label_sub,
+QWidget#lineOSK QLabel#label_characters,
+QWidget#boxOSK QLabel#label_characters_box {
+    color: #ccc;
+}
+
+QWidget#contentDialog QLabel#label_title,
+QWidget#contentRichDialog QLabel#label_title_rich {
+    color: #888;
+}
+
+QWidget#contentDialog QLabel#label_dialog {
+    padding: 20px 65px;
+}
+
+QWidget#contentDialog QLabel#label_title,
+QWidget#contentRichDialog QLabel#label_title_rich {
+    padding: 0px 65px;
+}
+
+QDialog#OverlayDialog QPushButton {
+    color: rgba(49, 79, 239, 1);
+    background: transparent;
+    border: none;
+    padding: 0px;
+    min-width: 0px;
+}
+
+QDialog#OverlayDialog QPushButton:focus,
+QDialog#OverlayDialog QPushButton:hover {
+    color: rgba(49, 79, 239, 1);
+    background: rgba(255, 255, 255, 1);
+    border: 5px solid rgba(148, 250, 202, 1);
+    border-radius: 6px;
+    outline: none;
+}
+
+QDialog#OverlayDialog QPushButton:pressed {
+    color: rgba(240, 240, 240, 1);
+    background: rgba(150, 150, 150, 1);
+    border: 5px solid rgba(148, 250, 202, 1);
+    border-radius: 6px;
+    outline: none;
+}
+
+QDialog#QtSoftwareKeyboardDialog QPushButton {
+    background: rgba(232, 232, 232, 1);
+    border: 2px solid rgba(240, 240, 240, 1);
+}
+
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_shift,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_return,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_space,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_shift_shift,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_return_shift,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_space_shift {
+    background: rgba(218, 218, 218, 1);
+    border: 2px solid rgba(240, 240, 240, 1);
+}
+
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_backspace,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_backspace_shift,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_backspace_num {
+    color: rgba(240, 240, 240, 1);
+    background: rgba(44, 44, 44, 1);
+    border: 2px solid rgba(240, 240, 240, 1);
+}
+
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_ok,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_ok_shift,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_ok_num {
+    color: rgba(240, 240, 240, 1);
+    background: rgba(49, 79, 239, 1);
+    border: 2px solid rgba(240, 240, 240, 1);
+}
+
+QDialog#QtSoftwareKeyboardDialog QPushButton:focus,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_ok:focus,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_shift:focus,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_space:focus,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_return:focus,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_backspace:focus,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_ok_shift:focus,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_shift_shift:focus,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_space_shift:focus,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_return_shift:focus,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_backspace_shift:focus,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_ok_num:focus,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_backspace_num:focus,
+
+QDialog#QtSoftwareKeyboardDialog QPushButton:hover,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_ok:hover,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_shift:hover,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_space:hover,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_return:hover,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_backspace:hover,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_ok_shift:hover,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_shift_shift:hover,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_space_shift:hover,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_return_shift:hover,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_backspace_shift:hover,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_ok_num:hover,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_backspace_num:hover {
+    color: rgba(0, 0, 0, 1);
+    background: rgba(255, 255, 255, 1);
+    border: 5px solid rgba(148, 250, 202, 1);
+    border-radius: 6px;
+    outline: none;
+}
+
+QDialog#QtSoftwareKeyboardDialog QPushButton:pressed,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_ok:pressed,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_shift:pressed,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_space:pressed,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_return:pressed,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_backspace:pressed,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_ok_shift:pressed,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_shift_shift:pressed,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_space_shift:pressed,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_return_shift:pressed,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_backspace_shift:pressed,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_ok_num:pressed,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_backspace_num:pressed {
+    color: rgba(240, 240, 240, 1);
+    background: rgba(150, 150, 150, 1);
+    border: 5px solid rgba(148, 250, 202, 1);
+    border-radius: 6px;
+}
+
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_backspace,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_backspace_shift,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_backspace_num {
+    image: url(:/overlay/osk_button_B.png);
+    image-position: right;
+    qproperty-icon: url(:/overlay/osk_button_backspace.png);
+    qproperty-iconSize: 36px;
+}
+
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_space,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_space_shift {
+    image: url(:/overlay/osk_button_Y.png);
+    image-position: right;
+}
+
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_ok,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_ok_shift,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_ok_num {
+    image: url(:/overlay/osk_button_plus.png);
+    image-position: right;
+}
+
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_shift {
+    image: url(:/overlay/osk_button_shift_lock_off.png);
+    image-position: left;
+    qproperty-icon: url(:/overlay/osk_button_shift.png);
+    qproperty-iconSize: 36px;
+}
+
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_shift_shift {
+    image: url(:/overlay/osk_button_shift_lock_off.png);
+    image-position: left;
+    qproperty-icon: url(:/overlay/osk_button_shift_on.png);
+    qproperty-iconSize: 36px;
+}
+
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_left_bracket,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_right_bracket,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_left_parenthesis,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_right_parenthesis {
+    padding-bottom: 7px;
+}
+
+QDialog#QtSoftwareKeyboardDialog QWidget#titleOSK QLabel {
+    background: transparent;
+    color: #ccc;
+}
+
+QDialog#QtSoftwareKeyboardDialog QWidget#button_L,
+QDialog#QtSoftwareKeyboardDialog QWidget#button_L_shift,
+QDialog#QtSoftwareKeyboardDialog QWidget#button_L_num {
+    image: url(:/overlay/button_L.png);
+}
+
+QDialog#QtSoftwareKeyboardDialog QWidget#arrow_left,
+QDialog#QtSoftwareKeyboardDialog QWidget#arrow_left_shift,
+QDialog#QtSoftwareKeyboardDialog QWidget#arrow_left_num {
+    image: url(:/overlay/arrow_left.png);
+}
+
+QDialog#QtSoftwareKeyboardDialog QWidget#button_R,
+QDialog#QtSoftwareKeyboardDialog QWidget#button_R_shift,
+QDialog#QtSoftwareKeyboardDialog QWidget#button_R_num {
+    image: url(:/overlay/button_R.png);
+}
+
+QDialog#QtSoftwareKeyboardDialog QWidget#arrow_right,
+QDialog#QtSoftwareKeyboardDialog QWidget#arrow_right_shift,
+QDialog#QtSoftwareKeyboardDialog QWidget#arrow_right_num {
+    image: url(:/overlay/arrow_right.png);
+}
+
+QDialog#QtSoftwareKeyboardDialog QWidget#button_press_stick,
+QDialog#QtSoftwareKeyboardDialog QWidget#button_press_stick_shift {
+    image: url(:/overlay/button_press_stick.png);
+}
+
+QDialog#QtSoftwareKeyboardDialog QWidget#button_X,
+QDialog#QtSoftwareKeyboardDialog QWidget#button_X_shift,
+QDialog#QtSoftwareKeyboardDialog QWidget#button_X_num {
+    image: url(:/overlay/button_X.png);
+}
+
+QDialog#QtSoftwareKeyboardDialog QWidget#button_A,
+QDialog#QtSoftwareKeyboardDialog QWidget#button_A_shift,
+QDialog#QtSoftwareKeyboardDialog QWidget#button_A_num {
+    image: url(:/overlay/button_A.png);
+}
+
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_ok:disabled,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_space:disabled,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_return:disabled,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_backspace:disabled,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_ok_shift:disabled,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_space_shift:disabled,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_return_shift:disabled,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_backspace_shift:disabled,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_ok_num:disabled,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_backspace_num:disabled {
+    color: rgba(164, 164, 164, 1);
+    background-color: rgba(218, 218, 218, 1);
+}
+
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_at:disabled,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_slash:disabled,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_percent:disabled,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_1:disabled,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_2:disabled,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_3:disabled,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_4:disabled,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_5:disabled,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_6:disabled,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_7:disabled,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_8:disabled,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_9:disabled,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_0:disabled,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_return:disabled {
+    color: rgba(164, 164, 164, 1);
+}
+
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_ok:disabled,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_ok_shift:disabled,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_ok_num:disabled {
+    image: url(:/overlay/osk_button_plus_disabled.png);
+}
+
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_backspace:disabled,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_backspace_shift:disabled,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_backspace_num:disabled {
+    image: url(:/overlay/osk_button_B_disabled.png);
+}
+
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_space:disabled,
+QDialog#QtSoftwareKeyboardDialog QPushButton#button_space_shift:disabled {
+    image: url(:/overlay/osk_button_Y_disabled.png);
+}

dist/qt_themes/qdarkstyle/style.qrc

@@ -10,7 +10,7 @@
     <file alias="48x48/chip.png">icons/48x48/chip.png</file>
     <file alias="48x48/folder.png">icons/48x48/folder.png</file>
     <file alias="48x48/no_avatar.png">icons/48x48/no_avatar.png</file>
-    <file alias="48x48/plus.png">icons/48x48/plus.png</file>
+    <file alias="48x48/list-add.png">icons/48x48/list-add.png</file>
     <file alias="48x48/sd_card.png">icons/48x48/sd_card.png</file>
     <file alias="48x48/star.png">icons/48x48/star.png</file>
     <file alias="256x256/plus_folder.png">icons/256x256/plus_folder.png</file>

dist/qt_themes/qdarkstyle_midnight_blue/style.qrc

@@ -1,15 +1,16 @@
 <RCC>
   <qresource prefix="icons/qdarkstyle_midnight_blue">
     <file alias="index.theme">icons/index.theme</file>
-    <file alias="16x16/lock.png">icons/16x16/lock.png</file>
+    <file alias="16x16/lock.png">../qdarkstyle/icons/16x16/lock.png</file>
-    <file alias="16x16/view-refresh.png">icons/16x16/view-refresh.png</file>
+    <file alias="16x16/view-refresh.png">../qdarkstyle/icons/16x16/view-refresh.png</file>
-    <file alias="48x48/bad_folder.png">icons/48x48/bad_folder.png</file>
+    <file alias="48x48/bad_folder.png">../qdarkstyle/icons/48x48/bad_folder.png</file>
-    <file alias="48x48/chip.png">icons/48x48/chip.png</file>
+    <file alias="48x48/chip.png">../qdarkstyle/icons/48x48/chip.png</file>
-    <file alias="48x48/folder.png">icons/48x48/folder.png</file>
+    <file alias="48x48/folder.png">../qdarkstyle/icons/48x48/folder.png</file>
-    <file alias="48x48/plus.png">icons/48x48/plus.png</file>
+    <file alias="48x48/no_avatar.png">../qdarkstyle/icons/48x48/no_avatar.png</file>
-    <file alias="48x48/sd_card.png">icons/48x48/sd_card.png</file>
+    <file alias="48x48/list-add.png">../qdarkstyle/icons/48x48/list-add.png</file>
-    <file alias="48x48/star.png">icons/48x48/star.png</file>
+    <file alias="48x48/sd_card.png">../qdarkstyle/icons/48x48/sd_card.png</file>
-    <file alias="256x256/plus_folder.png">icons/256x256/plus_folder.png</file>
+    <file alias="48x48/star.png">../qdarkstyle/icons/48x48/star.png</file>
+    <file alias="256x256/plus_folder.png">../qdarkstyle/icons/256x256/plus_folder.png</file>
   </qresource>
   <qresource prefix="qss_icons">
     <file>rc/arrow_down.png</file>

src/yuzu/game_list.cpp

@@ -286,7 +286,7 @@ void GameList::OnUpdateThemedIcons() {
         }
         case GameListItemType::AddDir:
             child->setData(
-                QIcon::fromTheme(QStringLiteral("plus"))
+                QIcon::fromTheme(QStringLiteral("list-add"))
                     .pixmap(icon_size)
                     .scaled(icon_size, icon_size, Qt::IgnoreAspectRatio, Qt::SmoothTransformation),
                 Qt::DecorationRole);

src/yuzu/game_list_p.h

@@ -294,7 +294,7 @@ public:
 
         const int icon_size = UISettings::values.folder_icon_size.GetValue();
 
-        setData(QIcon::fromTheme(QStringLiteral("plus"))
+        setData(QIcon::fromTheme(QStringLiteral("list-add"))
                     .pixmap(icon_size)
                     .scaled(icon_size, icon_size, Qt::IgnoreAspectRatio, Qt::SmoothTransformation),
                 Qt::DecorationRole);

src/yuzu/main.cpp

@@ -257,6 +257,18 @@ static QString PrettyProductName() {
     return QSysInfo::prettyProductName();
 }
 
+bool GMainWindow::check_dark_mode() {
+#ifdef __linux__
+    const QPalette test_palette(qApp->palette());
+    const QColor text_color = test_palette.color(QPalette::Active, QPalette::Text);
+    const QColor window_color = test_palette.color(QPalette::Active, QPalette::Window);
+    return (text_color.value() > window_color.value());
+#else
+    // TODO: Windows
+    return false;
+#endif // __linux__
+}
+
 GMainWindow::GMainWindow(bool has_broken_vulkan)
     : ui{std::make_unique<Ui::MainWindow>()}, system{std::make_unique<Core::System>()},
       input_subsystem{std::make_shared<InputCommon::InputSubsystem>()},
@@ -274,6 +286,13 @@ GMainWindow::GMainWindow(bool has_broken_vulkan)
     ui->setupUi(this);
     statusBar()->hide();
 
+    // Check dark mode before a theme is loaded
+    os_dark_mode = check_dark_mode();
+    startup_icon_theme = QIcon::themeName();
+    // fallback can only be set once, colorful theme icons are okay on both light/dark
+    QIcon::setFallbackThemeName(QStringLiteral("colorful"));
+    QIcon::setFallbackSearchPaths(QStringList(QStringLiteral(":/icons")));
+
     default_theme_paths = QIcon::themeSearchPaths();
     UpdateUITheme();
 
@@ -3930,8 +3949,21 @@ void GMainWindow::filterBarSetChecked(bool state) {
     emit(OnToggleFilterBar());
 }
 
+static void AdjustLinkColor() {
+    QPalette new_pal(qApp->palette());
+    if (UISettings::IsDarkTheme()) {
+        new_pal.setColor(QPalette::Link, QColor(0, 190, 255, 255));
+    } else {
+        new_pal.setColor(QPalette::Link, QColor(0, 140, 200, 255));
+    }
+    if (qApp->palette().color(QPalette::Link) != new_pal.color(QPalette::Link)) {
+        qApp->setPalette(new_pal);
+    }
+}
+
 void GMainWindow::UpdateUITheme() {
-    const QString default_theme = QStringLiteral("default");
+    const QString default_theme =
+        QString::fromUtf8(UISettings::themes[static_cast<size_t>(Config::default_theme)].second);
     QString current_theme = UISettings::values.theme;
     QStringList theme_paths(default_theme_paths);
 
@@ -3939,6 +3971,23 @@ void GMainWindow::UpdateUITheme() {
         current_theme = default_theme;
     }
 
+#ifdef _WIN32
+    QIcon::setThemeName(current_theme);
+    AdjustLinkColor();
+#else
+    if (current_theme == QStringLiteral("default") || current_theme == QStringLiteral("colorful")) {
+        QIcon::setThemeName(current_theme == QStringLiteral("colorful") ? current_theme
+                                                                        : startup_icon_theme);
+        QIcon::setThemeSearchPaths(theme_paths);
+        if (check_dark_mode()) {
+            current_theme = QStringLiteral("default_dark");
+        }
+    } else {
+        QIcon::setThemeName(current_theme);
+        QIcon::setThemeSearchPaths(QStringList(QStringLiteral(":/icons")));
+        AdjustLinkColor();
+    }
+#endif
     if (current_theme != default_theme) {
         QString theme_uri{QStringLiteral(":%1/style.qss").arg(current_theme)};
         QFile f(theme_uri);
@@ -3961,17 +4010,6 @@ void GMainWindow::UpdateUITheme() {
         qApp->setStyleSheet({});
         setStyleSheet({});
     }
-
-    QPalette new_pal(qApp->palette());
-    if (UISettings::IsDarkTheme()) {
-        new_pal.setColor(QPalette::Link, QColor(0, 190, 255, 255));
-    } else {
-        new_pal.setColor(QPalette::Link, QColor(0, 140, 200, 255));
-    }
-    qApp->setPalette(new_pal);
-
-    QIcon::setThemeName(current_theme);
-    QIcon::setThemeSearchPaths(theme_paths);
 }
 
 void GMainWindow::LoadTranslation() {
@@ -4022,6 +4060,26 @@ void GMainWindow::SetDiscordEnabled([[maybe_unused]] bool state) {
     discord_rpc->Update();
 }
 
+void GMainWindow::changeEvent(QEvent* event) {
+#ifdef __linux__
+    // PaletteChange event appears to only reach so far into the GUI, explicitly asking to
+    // UpdateUITheme is a decent work around
+    if (event->type() == QEvent::PaletteChange) {
+        const QPalette test_palette(qApp->palette());
+        const QString current_theme = UISettings::values.theme;
+        // Keeping eye on QPalette::Window to avoid looping. QPalette::Text might be useful too
+        static QColor last_window_color;
+        const QColor window_color = test_palette.color(QPalette::Active, QPalette::Window);
+        if (last_window_color != window_color && (current_theme == QStringLiteral("default") ||
+                                                  current_theme == QStringLiteral("colorful"))) {
+            UpdateUITheme();
+        }
+        last_window_color = window_color;
+    }
+#endif // __linux__
+    QWidget::changeEvent(event);
+}
+
 #ifdef main
 #undef main
 #endif

src/yuzu/main.h

@@ -251,6 +251,7 @@ private:
     bool ConfirmForceLockedExit();
     void RequestGameExit();
     void RequestGameResume();
+    void changeEvent(QEvent* event) override;
     void closeEvent(QCloseEvent* event) override;
 
 #ifdef __linux__
@@ -392,6 +393,10 @@ private:
     QTimer mouse_hide_timer;
     QTimer mouse_center_timer;
 
+    QString startup_icon_theme;
+    bool os_dark_mode = false;
+    bool check_dark_mode();
+
     // FS
     std::shared_ptr<FileSys::VfsFilesystem> vfs;
     std::unique_ptr<FileSys::ManualContentProvider> provider;