Theme.h

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#pragma once
#include "common/Export.h"
 
#include <cstdint>
#include <string>
 
namespace eve::ui {
 
struct ThemeLayout {
    float toolbarHeight = 48.f;
    float statusBarHeight = 36.f;
    float sidebarWidth = 240.f;
    float toolboxCellSize = 44.f;
    float splitterSize = 6.f;
    float minPaneSize = 160.f;
    float panelPaddingX = 12.f;
    float panelPaddingY = 10.f;
    float cardPaddingX = 14.f;
    float cardPaddingY = 12.f;
    float barPaddingX = 10.f;
    float barPaddingY = 6.f;
    float sectionSpacingY = 6.f;
    float searchMinWidth = 120.f;
    float searchIconGap = 7.f;
};
 
struct EVENGINE_API_WORLD Theme {
    ThemeLayout layout;
 
    // --- Colors (RGBA 0..1) ---
    float text[4] = {0.87f, 0.89f, 0.93f, 1.f};
    float textDisabled[4] = {0.55f, 0.58f, 0.65f, 1.f};
    float windowBg[4] = {0.145f, 0.155f, 0.19f, 0.99f};
    float childBg[4] = {0.18f, 0.195f, 0.24f, 0.98f};
    float popupBg[4] = {0.18f, 0.195f, 0.24f, 0.99f};
    float border[4] = {0.095f, 0.105f, 0.135f, 0.92f};
    float borderShadow[4] = {0.f, 0.f, 0.f, 0.f};
    float frameBg[4] = {0.16f, 0.17f, 0.21f, 1.f};
    float frameBgHovered[4] = {0.21f, 0.225f, 0.275f, 1.f};
    float frameBgActive[4] = {0.25f, 0.22f, 0.26f, 1.f};
    float titleBg[4] = {0.21f, 0.225f, 0.275f, 1.f};
    float titleBgActive[4] = {0.235f, 0.25f, 0.305f, 1.f};
    float titleBgCollapsed[4] = {0.19f, 0.205f, 0.25f, 0.96f};
    float menuBarBg[4] = {0.225f, 0.24f, 0.29f, 1.f};
    float button[4] = {0.18f, 0.195f, 0.24f, 1.f};
    float buttonHovered[4] = {0.43f, 0.25f, 0.30f, 1.f};
    float buttonActive[4] = {0.98f, 0.36f, 0.43f, 1.f};
    float header[4] = {0.25f, 0.22f, 0.27f, 0.78f};
    float headerHovered[4] = {0.43f, 0.25f, 0.30f, 0.92f};
    float headerActive[4] = {0.60f, 0.29f, 0.34f, 1.f};
    float checkMark[4] = {1.f, 0.39f, 0.45f, 1.f};
    float sliderGrab[4] = {0.92f, 0.34f, 0.40f, 0.94f};
    float sliderGrabActive[4] = {1.f, 0.46f, 0.51f, 1.f};
    float separator[4] = {0.095f, 0.105f, 0.135f, 0.88f};
    float scrollbarBg[4] = {0.105f, 0.115f, 0.15f, 0.62f};
    float scrollbarGrab[4] = {0.29f, 0.31f, 0.37f, 0.90f};
    float scrollbarGrabHovered[4] = {0.39f, 0.41f, 0.48f, 0.96f};
    float scrollbarGrabActive[4] = {0.55f, 0.31f, 0.36f, 1.f};
    float tab[4] = {0.18f, 0.195f, 0.24f, 1.f};
    float tabHovered[4] = {0.42f, 0.25f, 0.30f, 1.f};
    float tabActive[4] = {0.28f, 0.225f, 0.27f, 1.f};
    float tabUnfocused[4] = {0.155f, 0.165f, 0.205f, 1.f};
    float tabUnfocusedActive[4] = {0.22f, 0.20f, 0.24f, 1.f};
    float tableHeaderBg[4] = {0.20f, 0.215f, 0.26f, 1.f};
    float tableBorderStrong[4] = {0.095f, 0.105f, 0.135f, 0.92f};
    float tableBorderLight[4] = {0.14f, 0.15f, 0.19f, 0.72f};
    float tableRowBg[4] = {0.f, 0.f, 0.f, 0.f};
    float tableRowBgAlt[4] = {0.31f, 0.33f, 0.39f, 0.22f};
    float plotLines[4] = {0.62f, 0.65f, 0.72f, 1.f};
    float plotLinesHovered[4] = {1.f, 0.39f, 0.45f, 1.f};
    float plotHistogram[4] = {0.85f, 0.60f, 0.28f, 1.f};
    float plotHistogramHovered[4] = {0.96f, 0.70f, 0.34f, 1.f};
    float textSelectedBg[4] = {0.90f, 0.31f, 0.38f, 0.42f};
    float navHighlight[4] = {1.f, 0.39f, 0.45f, 0.88f};
    float modalDimBg[4] = {0.055f, 0.06f, 0.08f, 0.72f};
 
    // --- Geometry (design units @ scale 1) ---
    float windowRounding = 3.f;
    float childRounding = 3.f;
    float frameRounding = 3.f;
    float popupRounding = 4.f;
    float scrollbarRounding = 3.f;
    float grabRounding = 3.f;
    float tabRounding = 2.f;
 
    float windowBorderSize = 1.f;
    float childBorderSize = 1.f;
    float popupBorderSize = 1.f;
    float frameBorderSize = 0.f;
 
    float windowPaddingX = 14.f;
    float windowPaddingY = 12.f;
    float framePaddingX = 9.f;
    float framePaddingY = 5.f;
    float itemSpacingX = 9.f;
    float itemSpacingY = 7.f;
    float itemInnerSpacingX = 6.f;
    float itemInnerSpacingY = 4.f;
    float cellPaddingX = 6.f;
    float cellPaddingY = 3.f;
    float indentSpacing = 16.f;
    float scrollbarSize = 10.f;
    float grabMinSize = 8.f;
 
    float fontScale = 1.f;
    bool navEnableKeyboard = true;
    bool navEnableGamepad = false;
 
    static Theme dark();
    static Theme light();
};
 
struct StyleClass {
    std::string name;
    std::string parent;
    bool hasTextColor = false;
    bool hasBackgroundColor = false;
    bool hasBorderColor = false;
    bool hasAccentColor = false;
    float textColor[4] = {0.f, 0.f, 0.f, 0.f};
    float backgroundColor[4] = {0.f, 0.f, 0.f, 0.f};
    float borderColor[4] = {0.f, 0.f, 0.f, 0.f};
    float accentColor[4] = {0.f, 0.f, 0.f, 0.f};
    bool hasPadding = false;
    float paddingX = 0.f;
    float paddingY = 0.f;
    bool hasRounding = false;
    float rounding = 0.f;
    bool hasAlpha = false;
    float alpha = 1.f;
};
 
enum class StyleClassStatus : uint8_t {
    Applied = 0,
    InvalidName,
    UnknownParent,
    UnknownClass,
    UnknownProperty,
    InheritanceCycle,
};
 
[[nodiscard]] EVENGINE_API_WORLD StyleClassStatus defineStyleClass(const std::string &name,
                                                                   const std::string &parent = "");
[[nodiscard]] EVENGINE_API_WORLD StyleClassStatus setStyleClassColor(const std::string &name,
                                                                     const std::string &property, float r, float g,
                                                                     float b, float a);
[[nodiscard]] EVENGINE_API_WORLD StyleClassStatus setStyleClassMetric(const std::string &name,
                                                                      const std::string &property, float x,
                                                                      float y = 0.f);
[[nodiscard]] EVENGINE_API_WORLD StyleClassStatus resolveStyleClass(const std::string &name, StyleClass *out);
EVENGINE_API_WORLD void clearStyleClasses();
const char *styleClassStatusName(StyleClassStatus status);
 
EVENGINE_API_WORLD Theme &globalTheme();
EVENGINE_API_WORLD const std::string &globalThemeName();
 
EVENGINE_API_WORLD void setGlobalTheme(const Theme &theme);
EVENGINE_API_WORLD void setGlobalTheme(const Theme &theme, const std::string &name);
 
bool setThemeByName(const std::string &name);
 
EVENGINE_API_WORLD void  setThemeUiScale(float scale);
EVENGINE_API_WORLD float themeUiScale();
 
void setThemeDpiScale(float dpiScale);
float themeDpiScale();
 
EVENGINE_API_WORLD void applyThemeToImGui(const Theme &theme);
EVENGINE_API_WORLD void applyThemeToImGui(const Theme &theme, float uiScale);
 
}  // namespace eve::ui