theme-switcher-package/theme-switcher

#!/bin/bash
icons=/usr/share/tromjaro-theme-switcher/icons

set_icon_theme() {
    # Change icon theme in XFCE
    xfconf-query -c xsettings -p /Net/IconThemeName -n -t string -s "$1"
    # Change icon theme in qt5ct configuration
    sed -i "s/^icon_theme=.*$/icon_theme=$1/" "$HOME"/.config/qt5ct/qt5ct.conf
}

set_theme() {
    if [ "${1##*-}" = 'Light' ]; then
        yad --image "dialog-question" --title '' --buttons-layout=center --text-align=center --button='DARK':1 --button='LIGHT':0 --text "Select the panels theme\n\nNote: dark panels may result in light icons over a light theme"
        case $? in
            1)
                # Enable dark panels
                xfconf-query -c xfce4-panel -p /panels/dark-mode -n -t bool -s true
                # Use the dark icon theme
                set_icon_theme zafiro-dark
                ;;
            0)
                # Disable dark panels
                xfconf-query -c xfce4-panel -p /panels/dark-mode -n -t bool -s false
                # Use the light icon theme
                set_icon_theme zafiro
                ;;
            *) exit ;;
        esac
    else
        # Use the dark icon theme
        set_icon_theme zafiro-dark
    fi
    # Change the main theme to the chosen one
    xfconf-query -c xsettings -p /Net/ThemeName -n -t string -s "Skeuos-$1"
    xfconf-query -c xfwm4 -p /general/theme -n -t string -s "Skeuos-$1-XFWM"
    gsettings set org.gnome.desktop.interface gtk-theme "Skeuos-$1"
    notify-send "Skeuos-$1 theme was enabled"
}

export -f set_icon_theme set_theme

yad --no-buttons --center --keep-icon-size --use-interp --title 'TROMjaro Theme Switcher' --text-align=center --text "A Theme Switcher for TROMjaro's default theme-set (Skeuos) and icon-set (Zafiro)." --form --columns 5 \
--field=!"$icons/Blue-Dark.png"!'Blue-Dark':FBTN "set_theme 'Blue-Dark'" \
--field=!"$icons/Violet-Dark.png"!'Violet-Dark':FBTN "set_theme 'Violet-Dark'" \
--field=!"$icons/Blue-Light.png"!'Blue-Light':FBTN "set_theme 'Blue-Light'" \
--field=!"$icons/Violet-Light.png"!'Violet-Light':FBTN "set_theme 'Violet-Light'" \
--field=!"$icons/Teal-Dark.png"!'Teal-Dark':FBTN "set_theme 'Teal-Dark'" \
--field=!"$icons/Orange-Dark.png"!'Orange-Dark':FBTN "set_theme 'Orange-Dark'" \
--field=!"$icons/Teal-Light.png"!'Teal-Light':FBTN "set_theme 'Teal-Light'" \
--field=!"$icons/Orange-Light.png"!'Orange-Light':FBTN "set_theme 'Orange-Light'" \
--field=!"$icons/Green-Dark.png"!'Green-Dark (default)':FBTN "set_theme 'Green-Dark'" \
--field=!"$icons/Brown-Dark.png"!'Brown-Dark':FBTN "set_theme 'Brown-Dark'" \
--field=!"$icons/Green-Light.png"!'Green-Light':FBTN "set_theme 'Green-Light'" \
--field=!"$icons/Brown-Light.png"!'Brown-Light':FBTN "set_theme 'Brown-Light'" \
--field=!"$icons/Magenta-Dark.png"!'Magenta-Dark':FBTN "set_theme 'Magenta-Dark'" \
--field=!"$icons/Yellow-Dark.png"!'Yellow-Dark':FBTN "set_theme 'Yellow-Dark'" \
--field=!"$icons/Magenta-Light.png"!'Magenta-Light':FBTN "set_theme 'Magenta-Light'" \
--field=!"$icons/Yellow-Light.png"!'Yellow-Light':FBTN "set_theme 'Yellow-Light'" \
--field=!"$icons/Red-Dark.png"!'Red-Dark':FBTN "set_theme 'Red-Dark'" \
--field=!"$icons/Grey-Dark.png"!'Grey-Dark':FBTN "set_theme 'Grey-Dark'" \
--field=!"$icons/Red-Light.png"!'Red-Light':FBTN "set_theme 'Red-Light'" \
--field=!"$icons/Grey-Light.png"!'Grey-Light':FBTN "set_theme 'Grey-Light'"