Simple Theme Generator (Add-on)

themegen.py

# ##### BEGIN GPL LICENSE BLOCK #####
#
#  This program is free software; you can redistribute it and/or
#  modify it under the terms of the GNU General Public License
#  as published by the Free Software Foundation; either version 2
#  of the License, or (at your option) any later version.
#
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
#
#  You should have received a copy of the GNU General Public License
#  along with this program; if not, write to the Free Software Foundation,
#  Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
# ##### END GPL LICENSE BLOCK #####

from bpy.props import BoolProperty, IntProperty, FloatProperty, FloatVectorProperty
from bpy.types import (
    AddonPreferences,
    ThemeWidgetColors
)
import colorsys
import os
import bpy
bl_info = {
    "name": "Theme Generator",
    "author": "none",
    "version": (0, 0, 1),
    "blender": (3, 0, 0),
    "description": "Simple theme generator from a single color",
    "category": "Interface",
}


def c(color, value, alpha=None):
    hsv = colorsys.rgb_to_hsv(*color)
    hsv = (hsv[0], hsv[1], hsv[2] * value)
    rgb = colorsys.hsv_to_rgb(*hsv)
    if alpha != None:
        rgb = (*rgb, alpha)
    return rgb


class theme_generatorPreferences(AddonPreferences):
    bl_idname = __name__

    darkest: FloatProperty(
        name="Darkest",
        default=0.11,
        min=0.0,
        max=1.0,
        precision=3,
        description="Darkest",
    )

    darker: FloatProperty(
        name="Darker",
        default=0.2,
        min=0.0,
        max=1.0,
        precision=3,
        description="Darker",
    )

    dark: FloatProperty(
        name="Dark",
        default=0.25,
        min=0.0,
        max=1.0,
        precision=3,
        description="Dark",
    )

    base: FloatProperty(
        name="Base",
        default=0.3,
        min=0.0,
        max=1.0,
        precision=3,
        description="Base",
    )

    bright: FloatProperty(
        name="Bright",
        default=0.45,
        min=0.0,
        max=1.0,
        precision=3,
        description="Bright",
    )

    brighter: FloatProperty(
        name="Brighter",
        default=0.585,
        min=0.0,
        max=1.0,
        precision=3,
        description="Brighter",
    )

    base_color: FloatVectorProperty(
        name="Base Color",
        subtype="COLOR",
        size=3,
        default=(1.0, 1.0, 1.0),
        min=0.0,
        max=1.0,
        description="Tint",
    )

    def draw(self, context):
        layout = self.layout
        box = layout.box()
        row1 = box.row()

        row1.prop(self, "base_color")
        row1.operator("thmgen.apply_theme", text="Apply Theme")

        row2 = box.row()
        row2.prop(self, "brighter")

        row3 = box.row()
        row3.prop(self, "bright")

        row4 = box.row()
        row4.prop(self, "base")

        row5 = box.row()
        row5.prop(self, "dark")

        row6 = box.row()
        row6.prop(self, "darker")

        row7 = box.row()
        row7.prop(self, "darkest")


class theme_generator_OT_ApplyThemeOperator(bpy.types.Operator):
    bl_idname = "thmgen.apply_theme"
    bl_label = "Apply Theme"

    def execute(self, context):
        prefs = bpy.context.preferences
        theme = prefs.themes[0]
        props = prefs.addons[__name__].preferences

        COL = props.base_color
        DARKEST = props.darkest
        DARKER = props.darker
        DARK = props.dark
        BASE = props.base
        BRIGHT = props.bright
        BRIGHTER = props.brighter

        tui = theme.user_interface

        # SpaceListGeneric
        for t in [theme.clip_editor, theme.dopesheet_editor, theme.graph_editor,
                  theme.nla_editor, theme.node_editor, theme.spreadsheet]:
            t.space_list.list = c(COL, DARK)

        # Outliner
        theme.outliner.active = c(COL, DARKER)
        theme.outliner.selected_object = c(COL, BRIGHT)
        theme.outliner.active_object = c(COL, BRIGHTER)
        theme.outliner.selected_highlight = c(COL, DARK)

        # Graph/Sequence/DopeSheet Editor
        for t in [theme.graph_editor, theme.sequence_editor, theme.dopesheet_editor]:
            t.grid = c(COL, DARKEST)
            t.time_scrub_background = c(COL, DARK, alpha=1.0)
            t.frame_current = c(COL, DARKER)

        # Node Editor
        theme.node_editor.node_backdrop = c(COL, DARKER, alpha=0.4)

        # User Interface
        tui.editor_outline = c(COL, DARKEST)
        tui.wcol_numslider.item = c(COL, DARK, alpha=0.1)
        tui.wcol_pie_menu.item = c(COL, DARK, alpha=0.8)
        tui.wcol_tab.text = c(COL, BRIGHTER)
        tui.wcol_progress.item = c(COL, DARKER, alpha=0.2)

        # 3D View
        theme.view_3d.space.gradients.high_gradient = c(COL, DARKEST)
        theme.view_3d.space.gradients.background_type = "SINGLE_COLOR"

        theme.view_3d.grid = c(COL, BASE, alpha=0.1)
        theme.view_3d.space.header = c(COL, DARK, alpha=0.1)
        theme.view_3d.space.button = c(COL, DARK, alpha=0.1)
        theme.view_3d.space.tab_active = c(COL, DARK)
        theme.view_3d.space.tab_inactive = c(COL, DARK)
        theme.view_3d.space.tab_back = c(COL, DARKER, alpha=0.1)
        theme.view_3d.space.tab_outline = c(COL, DARK)
        theme.view_3d.space.navigation_bar = c(COL, DARKER, alpha=0.1)
        theme.view_3d.space.execution_buts = c(COL, DARKER, alpha=0.1)

        # ThemeWidgetColors
        for i in dir(tui):
            if isinstance(getattr(tui, i), ThemeWidgetColors):
                getattr(tui, i).outline = c(COL, DARK)
                getattr(tui, i).inner = c(COL, BASE, alpha=1.0)
                getattr(tui, i).inner_sel = c(COL, BRIGHTER, alpha=1.0)

        # ThemeSpace
        for t in [theme.clip_editor, theme.console, theme.dopesheet_editor,
                  theme.file_browser, theme.graph_editor, theme.image_editor,
                  theme.info, theme.nla_editor, theme.node_editor,
                  theme.outliner, theme.preferences, theme.properties,
                  theme.sequence_editor, theme.spreadsheet, theme.statusbar,
                  theme.text_editor, theme.topbar]:
            t = t.space
            t.button = c(COL, DARK, alpha=0.1)
            t.header = c(COL, DARK, alpha=0.1)
            t.back = c(COL, DARK)
            t.tab_active = c(COL, BRIGHT)
            t.tab_inactive = c(COL, DARK)
            t.tab_back = c(COL, DARKER, alpha=0.1)
            t.tab_outline = c(COL, DARK)
            t.panelcolors.header = c(COL, BASE, alpha=0.1)
            t.navigation_bar = c(COL, DARKER, alpha=1.0)
            t.execution_buts = c(COL, DARKEST, alpha=0.0)
            t.panelcolors.back = c(COL, DARK, alpha=0.1)

        return {"FINISHED"}


def register():
    bpy.utils.register_class(theme_generatorPreferences)
    bpy.utils.register_class(theme_generator_OT_ApplyThemeOperator)


def unregister():
    bpy.utils.unregister_class(theme_generatorPreferences)
    bpy.utils.unregister_class(theme_generator_OT_ApplyThemeOperator)