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kte/themes/Tufte.h
Kyle Isom f49f1698f4 Add Tufte theme with light and dark variants 
Warm cream paper, near-black ink, zero rounding, minimal chrome,
restrained dark red and navy accents following Tufte's design principles.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
2026-03-24 17:34:23 -07:00

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// themes/Tufte.h — Edward Tufte inspired ImGui theme (header-only)
// Warm cream paper, dark ink, minimal chrome, restrained accent colors.
#pragma once
#include "ThemeHelpers.h"
// Light variant (primary — Tufte's books are fundamentally light)
static inline void
ApplyTufteLightTheme()
{
// Tufte palette: warm cream paper with near-black ink
const ImVec4 paper = RGBA(0xFFFFF8); // Tufte's signature warm white
const ImVec4 bg1 = RGBA(0xF4F0E8); // slightly darker cream
const ImVec4 bg2 = RGBA(0xEAE6DE); // UI elements
const ImVec4 bg3 = RGBA(0xDDD9D1); // hover/active
const ImVec4 ink = RGBA(0x111111); // near-black text
const ImVec4 dim = RGBA(0x6B6B6B); // disabled/secondary text
const ImVec4 border = RGBA(0xD0CCC4); // subtle borders
// Tufte uses color sparingly: muted red for emphasis, navy for links
const ImVec4 red = RGBA(0xA00000); // restrained dark red
const ImVec4 blue = RGBA(0x1F3F6F); // dark navy
ImGuiStyle &style = ImGui::GetStyle();
style.WindowPadding = ImVec2(8.0f, 8.0f);
style.FramePadding = ImVec2(6.0f, 4.0f);
style.CellPadding = ImVec2(6.0f, 4.0f);
style.ItemSpacing = ImVec2(6.0f, 6.0f);
style.ItemInnerSpacing = ImVec2(6.0f, 4.0f);
style.ScrollbarSize = 12.0f;
style.GrabMinSize = 10.0f;
style.WindowRounding = 0.0f; // sharp edges — typographic, not app-like
style.FrameRounding = 0.0f;
style.PopupRounding = 0.0f;
style.GrabRounding = 0.0f;
style.TabRounding = 0.0f;
style.WindowBorderSize = 1.0f;
style.FrameBorderSize = 0.0f; // minimal frame borders
ImVec4 *colors = style.Colors;
colors[ImGuiCol_Text] = ink;
colors[ImGuiCol_TextDisabled] = dim;
colors[ImGuiCol_WindowBg] = paper;
colors[ImGuiCol_ChildBg] = paper;
colors[ImGuiCol_PopupBg] = ImVec4(bg1.x, bg1.y, bg1.z, 0.98f);
colors[ImGuiCol_Border] = border;
colors[ImGuiCol_BorderShadow] = RGBA(0x000000, 0.0f);
colors[ImGuiCol_FrameBg] = bg2;
colors[ImGuiCol_FrameBgHovered] = bg3;
colors[ImGuiCol_FrameBgActive] = bg1;
colors[ImGuiCol_TitleBg] = bg1;
colors[ImGuiCol_TitleBgActive] = bg2;
colors[ImGuiCol_TitleBgCollapsed] = bg1;
colors[ImGuiCol_MenuBarBg] = bg1;
colors[ImGuiCol_ScrollbarBg] = paper;
colors[ImGuiCol_ScrollbarGrab] = bg3;
colors[ImGuiCol_ScrollbarGrabHovered] = bg2;
colors[ImGuiCol_ScrollbarGrabActive] = border;
colors[ImGuiCol_CheckMark] = ink;
colors[ImGuiCol_SliderGrab] = ink;
colors[ImGuiCol_SliderGrabActive] = blue;
colors[ImGuiCol_Button] = bg2;
colors[ImGuiCol_ButtonHovered] = bg3;
colors[ImGuiCol_ButtonActive] = bg1;
colors[ImGuiCol_Header] = bg2;
colors[ImGuiCol_HeaderHovered] = bg3;
colors[ImGuiCol_HeaderActive] = bg3;
colors[ImGuiCol_Separator] = border;
colors[ImGuiCol_SeparatorHovered] = bg3;
colors[ImGuiCol_SeparatorActive] = red;
colors[ImGuiCol_ResizeGrip] = ImVec4(ink.x, ink.y, ink.z, 0.10f);
colors[ImGuiCol_ResizeGripHovered] = ImVec4(red.x, red.y, red.z, 0.50f);
colors[ImGuiCol_ResizeGripActive] = red;
colors[ImGuiCol_Tab] = bg2;
colors[ImGuiCol_TabHovered] = bg1;
colors[ImGuiCol_TabActive] = bg3;
colors[ImGuiCol_TabUnfocused] = bg2;
colors[ImGuiCol_TabUnfocusedActive] = bg3;
colors[ImGuiCol_TableHeaderBg] = bg2;
colors[ImGuiCol_TableBorderStrong] = border;
colors[ImGuiCol_TableBorderLight] = ImVec4(border.x, border.y, border.z, 0.5f);
colors[ImGuiCol_TableRowBg] = ImVec4(bg1.x, bg1.y, bg1.z, 0.0f);
colors[ImGuiCol_TableRowBgAlt] = ImVec4(bg1.x, bg1.y, bg1.z, 0.30f);
colors[ImGuiCol_TextSelectedBg] = ImVec4(red.x, red.y, red.z, 0.15f);
colors[ImGuiCol_DragDropTarget] = red;
colors[ImGuiCol_NavHighlight] = red;
colors[ImGuiCol_NavWindowingHighlight] = ImVec4(ink.x, ink.y, ink.z, 0.70f);
colors[ImGuiCol_NavWindowingDimBg] = ImVec4(0.0f, 0.0f, 0.0f, 0.15f);
colors[ImGuiCol_ModalWindowDimBg] = ImVec4(0.0f, 0.0f, 0.0f, 0.15f);
colors[ImGuiCol_PlotLines] = blue;
colors[ImGuiCol_PlotLinesHovered] = red;
colors[ImGuiCol_PlotHistogram] = blue;
colors[ImGuiCol_PlotHistogramHovered] = red;
}
// Dark variant — warm charcoal with cream ink, same restrained accents
static inline void
ApplyTufteDarkTheme()
{
const ImVec4 bg0 = RGBA(0x1C1B19); // warm near-black
const ImVec4 bg1 = RGBA(0x252420); // slightly lighter
const ImVec4 bg2 = RGBA(0x302F2A); // UI elements
const ImVec4 bg3 = RGBA(0x3D3C36); // hover/active
const ImVec4 ink = RGBA(0xEAE6DE); // cream text (inverted paper)
const ImVec4 dim = RGBA(0x9A9690); // disabled text
const ImVec4 border = RGBA(0x4A4840); // subtle borders
const ImVec4 red = RGBA(0xD06060); // warmer red for dark bg
const ImVec4 blue = RGBA(0x7098C0); // lighter navy for dark bg
ImGuiStyle &style = ImGui::GetStyle();
style.WindowPadding = ImVec2(8.0f, 8.0f);
style.FramePadding = ImVec2(6.0f, 4.0f);
style.CellPadding = ImVec2(6.0f, 4.0f);
style.ItemSpacing = ImVec2(6.0f, 6.0f);
style.ItemInnerSpacing = ImVec2(6.0f, 4.0f);
style.ScrollbarSize = 12.0f;
style.GrabMinSize = 10.0f;
style.WindowRounding = 0.0f;
style.FrameRounding = 0.0f;
style.PopupRounding = 0.0f;
style.GrabRounding = 0.0f;
style.TabRounding = 0.0f;
style.WindowBorderSize = 1.0f;
style.FrameBorderSize = 0.0f;
ImVec4 *colors = style.Colors;
colors[ImGuiCol_Text] = ink;
colors[ImGuiCol_TextDisabled] = dim;
colors[ImGuiCol_WindowBg] = bg0;
colors[ImGuiCol_ChildBg] = bg0;
colors[ImGuiCol_PopupBg] = ImVec4(bg1.x, bg1.y, bg1.z, 0.98f);
colors[ImGuiCol_Border] = border;
colors[ImGuiCol_BorderShadow] = RGBA(0x000000, 0.0f);
colors[ImGuiCol_FrameBg] = bg2;
colors[ImGuiCol_FrameBgHovered] = bg3;
colors[ImGuiCol_FrameBgActive] = bg1;
colors[ImGuiCol_TitleBg] = bg1;
colors[ImGuiCol_TitleBgActive] = bg2;
colors[ImGuiCol_TitleBgCollapsed] = bg1;
colors[ImGuiCol_MenuBarBg] = bg1;
colors[ImGuiCol_ScrollbarBg] = bg0;
colors[ImGuiCol_ScrollbarGrab] = bg3;
colors[ImGuiCol_ScrollbarGrabHovered] = border;
colors[ImGuiCol_ScrollbarGrabActive] = dim;
colors[ImGuiCol_CheckMark] = ink;
colors[ImGuiCol_SliderGrab] = ink;
colors[ImGuiCol_SliderGrabActive] = blue;
colors[ImGuiCol_Button] = bg2;
colors[ImGuiCol_ButtonHovered] = bg3;
colors[ImGuiCol_ButtonActive] = bg1;
colors[ImGuiCol_Header] = bg2;
colors[ImGuiCol_HeaderHovered] = bg3;
colors[ImGuiCol_HeaderActive] = bg3;
colors[ImGuiCol_Separator] = border;
colors[ImGuiCol_SeparatorHovered] = bg3;
colors[ImGuiCol_SeparatorActive] = red;
colors[ImGuiCol_ResizeGrip] = ImVec4(ink.x, ink.y, ink.z, 0.10f);
colors[ImGuiCol_ResizeGripHovered] = ImVec4(red.x, red.y, red.z, 0.50f);
colors[ImGuiCol_ResizeGripActive] = red;
colors[ImGuiCol_Tab] = bg2;
colors[ImGuiCol_TabHovered] = bg1;
colors[ImGuiCol_TabActive] = bg3;
colors[ImGuiCol_TabUnfocused] = bg2;
colors[ImGuiCol_TabUnfocusedActive] = bg3;
colors[ImGuiCol_TableHeaderBg] = bg2;
colors[ImGuiCol_TableBorderStrong] = border;
colors[ImGuiCol_TableBorderLight] = ImVec4(border.x, border.y, border.z, 0.5f);
colors[ImGuiCol_TableRowBg] = ImVec4(bg1.x, bg1.y, bg1.z, 0.0f);
colors[ImGuiCol_TableRowBgAlt] = ImVec4(bg1.x, bg1.y, bg1.z, 0.30f);
colors[ImGuiCol_TextSelectedBg] = ImVec4(red.x, red.y, red.z, 0.20f);
colors[ImGuiCol_DragDropTarget] = red;
colors[ImGuiCol_NavHighlight] = red;
colors[ImGuiCol_NavWindowingHighlight] = ImVec4(ink.x, ink.y, ink.z, 0.70f);
colors[ImGuiCol_NavWindowingDimBg] = ImVec4(0.0f, 0.0f, 0.0f, 0.35f);
colors[ImGuiCol_ModalWindowDimBg] = ImVec4(0.0f, 0.0f, 0.0f, 0.35f);
colors[ImGuiCol_PlotLines] = blue;
colors[ImGuiCol_PlotLinesHovered] = red;
colors[ImGuiCol_PlotHistogram] = blue;
colors[ImGuiCol_PlotHistogramHovered] = red;
}
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