/**
 * Supported application color themes exposed through UI-related system variables.
 *
 * - `light`: Light background and panel palette.
 * - `dark`: Dark background and panel palette.
 */
export type AcDbColorTheme = 'light' | 'dark';
/**
 * Canonical names of the system variables currently recognized by the database layer.
 *
 * The value of each field intentionally matches its key so callers can use this object as:
 * - a centralized source of truth for variable names
 * - a type-safe enum-like lookup table
 * - an iterable registry source via `Object.values(...)`
 */
export declare const AcDbSystemVariables: {
    /** Drawing version identifier, for example `AC1014`. */
    readonly ACADVER: "ACADVER";
    /** Base angle, in radians, used as the zero direction for angular input/output. */
    readonly ANGBASE: "ANGBASE";
    /** Positive angle direction flag: `0` for counterclockwise, `1` for clockwise. */
    readonly ANGDIR: "ANGDIR";
    /** Angular unit display mode, such as decimal degrees or degrees/minutes/seconds. */
    readonly AUNITS: "AUNITS";
    /** Number of decimal places (or display precision) for angular values; used together with AUNITS. */
    readonly AUPREC: "AUPREC";
    /** Current color applied to newly created entities. */
    readonly CECOLOR: "CECOLOR";
    /** Current entity linetype scale multiplier for newly created entities. */
    readonly CELTSCALE: "CELTSCALE";
    /** Current linetype name used when creating new entities. */
    readonly CELTYPE: "CELTYPE";
    /** Current lineweight applied to newly created entities. */
    readonly CELWEIGHT: "CELWEIGHT";
    /** Current transparency level for newly created entities. */
    readonly CETRANSPARENCY: "CETRANSPARENCY";
    /** Current layer name used when creating new entities. */
    readonly CLAYER: "CLAYER";
    /** Current multileader style name used when creating new MLEADER entities. */
    readonly CMLEADERSTYLE: "CMLEADERSTYLE";
    /** Current multiline scale used when creating new MLINE entities. */
    readonly CMLSCALE: "CMLSCALE";
    /** Current multiline style name used when creating new MLINE entities. */
    readonly CMLSTYLE: "CMLSTYLE";
    /** UI color theme selector used by the application shell or viewer integration. */
    readonly COLORTHEME: "COLORTHEME";
    /**
     * Controls the display and behavior of dynamic input at the cursor, enabling or
     * disabling on-screen pointer and dimension input
     */
    readonly DYNMODE: "DYNMODE";
    /** Controls display of prompts in Dynamic Input tooltips. */
    readonly DYNPROMPT: "DYNPROMPT";
    /** Upper-right corner of the model-space drawing extents. */
    readonly EXTMAX: "EXTMAX";
    /** Lower-left corner of the model-space drawing extents. */
    readonly EXTMIN: "EXTMIN";
    /** Default angle, in radians, for newly created hatch patterns. */
    readonly HPANG: "HPANG";
    /** Controls whether newly created hatches are associative. */
    readonly HPASSOC: "HPASSOC";
    /** Default background color for newly created hatch patterns. */
    readonly HPBACKGROUNDCOLOR: "HPBACKGROUNDCOLOR";
    /** Default color for newly created hatches. */
    readonly HPCOLOR: "HPCOLOR";
    /** Controls whether user-defined hatch patterns are doubled. */
    readonly HPDOUBLE: "HPDOUBLE";
    /** Controls how islands within newly created hatch boundaries are treated. */
    readonly HPISLANDDETECTION: "HPISLANDDETECTION";
    /** Default layer for newly created hatches and fills. */
    readonly HPLAYER: "HPLAYER";
    /** Default pattern name for newly created hatches in this session. */
    readonly HPNAME: "HPNAME";
    /** Default scale factor for newly created hatch patterns. */
    readonly HPSCALE: "HPSCALE";
    /** Controls whether one or separate hatch objects are created for multiple boundaries. */
    readonly HPSEPARATE: "HPSEPARATE";
    /** Default transparency for newly created hatches and fills. */
    readonly HPTRANSPARENCY: "HPTRANSPARENCY";
    /** Insertion units used for automatic scaling of inserted content. */
    readonly INSUNITS: "INSUNITS";
    /** Global linetype scale multiplier for the drawing database. */
    readonly LTSCALE: "LTSCALE";
    /** Linear unit display format for coordinates and distances (scientific, decimal, engineering, etc.). */
    readonly LUNITS: "LUNITS";
    /** Decimal places (or display precision) for linear values; used together with LUNITS. */
    readonly LUPREC: "LUPREC";
    /** Flag indicating whether lineweights are displayed in the editor/viewer. */
    readonly LWDISPLAY: "LWDISPLAY";
    /**
     * Legacy drawing measurement system: `0` = English (imperial), `1` = metric.
     * Used with unitless **INSUNITS** to choose default unit labeling.
     */
    readonly MEASUREMENT: "MEASUREMENT";
    /** Color used for measurement tool overlays (distance, area, arc). */
    readonly MEASUREMENTCOLOR: "MEASUREMENTCOLOR";
    /** Running object snap mode bitmask (OSNAP settings). */
    readonly OSMODE: "OSMODE";
    /** Point display style bitmask that controls how POINT entities are drawn. */
    readonly PDMODE: "PDMODE";
    /** Point display size, expressed as an absolute value or viewport percentage. */
    readonly PDSIZE: "PDSIZE";
    /** Pickbox half-size, in pixels, used for selection hit testing in the UI. */
    readonly PICKBOX: "PICKBOX";
    /** Controls whether Default, Edit, and Command mode shortcut menus are available in the drawing area. */
    readonly SHORTCUTMENU: "SHORTCUTMENU";
    /** Current text style name used when creating new text entities. */
    readonly TEXTSTYLE: "TEXTSTYLE";
    /**
     * Controls feet-inch and fractional display delimiters together with **LUNITS**
     * (`0` = report format, `1` = input format).
     */
    readonly UNITMODE: "UNITMODE";
    /** Flag indicating whether the drawing background should be rendered as white. */
    readonly WHITEBKCOLOR: "WHITEBKCOLOR";
};
/**
 * Union of all supported system variable names.
 *
 * Example: `'CLAYER' | 'LTSCALE' | ...`
 */
export type AcDbSystemVariableName = (typeof AcDbSystemVariables)[keyof typeof AcDbSystemVariables];
/**
 * Frozen list of all registered system variable names.
 *
 * This is primarily useful for validation, iteration, and building UI selectors.
 */
export declare const AC_DB_SYSTEM_VARIABLE_NAMES: readonly ("ACADVER" | "ANGBASE" | "ANGDIR" | "AUNITS" | "AUPREC" | "CECOLOR" | "CELTSCALE" | "CELTYPE" | "CELWEIGHT" | "CETRANSPARENCY" | "CLAYER" | "CMLEADERSTYLE" | "CMLSCALE" | "CMLSTYLE" | "COLORTHEME" | "DYNMODE" | "DYNPROMPT" | "EXTMAX" | "EXTMIN" | "HPANG" | "HPASSOC" | "HPBACKGROUNDCOLOR" | "HPCOLOR" | "HPDOUBLE" | "HPISLANDDETECTION" | "HPLAYER" | "HPNAME" | "HPSCALE" | "HPSEPARATE" | "HPTRANSPARENCY" | "INSUNITS" | "LTSCALE" | "LUNITS" | "LUPREC" | "LWDISPLAY" | "MEASUREMENT" | "MEASUREMENTCOLOR" | "OSMODE" | "PDMODE" | "PDSIZE" | "PICKBOX" | "SHORTCUTMENU" | "TEXTSTYLE" | "UNITMODE" | "WHITEBKCOLOR")[];
//# sourceMappingURL=AcDbSystemVariables.d.ts.map