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The Niveus look in the app: bevelled keys and inset wells (a hook in ImGui's RenderFrame), warm graphite and paper appearances made from one brand colour, Instrument Sans and JetBrains Mono; View > Appearance

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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Nexoniarz 2026-10-20 16:56:20 +02:00
commit 53d8ecbfcd
10 changed files with 565 additions and 118 deletions
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41
engine/ui/ui.h
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@ -1,16 +1,19 @@
#pragma once
// Game UI look: fonts from the game folder and a Source-like theme (dark
// translucent panels, flat buttons, light text, red highlights) on top of Dear ImGui.
// The UI's look: Niveus (github.com/Nexoniarz/niveus) on top of Dear ImGui. Buttons are keys,
// bevelled with light falling across them; fields are wells cut into the surface; warm
// graphite in dark, soft paper in light, and one brand colour that every accent is made from.
#include <cstdint>
#include <functional>
#include <string>
#include <vector>
struct ImFont;
struct ImDrawList;
struct ImVec2;
namespace keel::ui {
enum class Font { Regular, Bold, Title };
enum class Font { Regular, Bold, Title, Mono };
// After the renderer (ImGui context) and the VFS are up.
void init();
@ -25,10 +28,38 @@ float pixelScale();
// The backends call this between the platform's NewFrame and ImGui::NewFrame.
void applyPixelScale();
// The highlight colour: highlights, the logo.
inline constexpr uint8_t kAccent[3] = {227, 34, 45};
// ── Appearance ──
enum class Appearance { System, Dark, Light };
void setAppearance(Appearance a); // System: follows the desktop's (and changes with it)
Appearance appearance();
bool dark(); // what's showing now
// The brand colour (sRGB): the accent and its states, the text on it and the tint in the greys
// are all made from it, in both appearances.
void setBrand(uint8_t r, uint8_t g, uint8_t b);
// Niveus's semantic roles.
enum class Role {
Background, BackgroundSubtle, Surface, SurfaceElevated, SurfaceInset, SurfaceHover, SurfaceActive, Scrim,
Text, TextSecondary, TextTertiary, TextDisabled,
BorderSubtle, Border, BorderStrong,
Accent, AccentHover, AccentActive, AccentSubtle, AccentSubtleHover, AccentText, OnAccent,
Success, SuccessText, Warning, WarningText, Danger, DangerText, OnDanger,
Highlight, Lowlight, Outline, Shadow, ShadowInset, SheenTop, SheenBottom, SheenStrongTop, SheenStrongBottom,
Count
};
uint32_t color(Role r, float alpha = 1.0f); // ImU32
// The accent (alpha, and brighter or darker by `brightness`).
uint32_t accent(float alpha = 1.0f, float brightness = 1.0f); // ImU32
// The materials, for widgets drawn by hand.
enum class KeyState { Normal, Hovered, Pressed, On };
// A raised key; `on` keys are filled with the accent.
void drawKey(ImDrawList* dl, const ImVec2& a, const ImVec2& b, float rounding, KeyState state);
// A well cut into the surface (fields, tracks).
void drawWell(ImDrawList* dl, const ImVec2& a, const ImVec2& b, float rounding, bool hovered = false);
// The text/icon colour that goes on a key in that state.
uint32_t keyText(KeyState state);
// ── Popups: modal messages over everything (disconnects, errors, questions) ──
struct PopupButton {
std::string label;