/**
 * Payload of the `annotationEditorEvent` output. It is emitted whenever the user
 * adds, edits, moves, resizes or removes an annotation with one of the built-in
 * editors (highlight, ink/draw, free text, image stamp, signature).
 *
 * ## Coordinates are normalized (0..1)
 *
 * For the position/size related events (`added`, `moved`, `sizeChanged`) the
 * `value` carries an `x`, `y`, `width` and `height`. These are **not** pixels and
 * **not** PDF points — they are fractions between 0 and 1, relative to the page
 * and measured from the **top-left** corner (x grows right, y grows down). That
 * is why you see "strange numbers less than one".
 *
 * - `moved` → `value: { x, y }` (interactive drag) or `value: { x, y, page }`
 *   plus `previousValue: { x, y, page }` (keyboard nudge / multi-select move).
 * - `sizeChanged` → `value: { x, y, width, height }` holding the dimensions
 *   *before* the resize. For the current rectangle read it from the live editor:
 *   `event.source.x / .y / .width / .height`.
 *
 * To convert these fractions:
 * - **to canvas pixels** (e.g. for a screenshot): multiply by the canvas width/height (no flip needed,
 *   both use a top-left origin). You can also hand the rectangle straight to
 *   `NgxExtendedPdfViewerService.getPageAsCanvas(page, scale, ..., cropBox)`.
 * - **to PDF user-space points** (bottom-left origin): use
 *   `pdfPage.getViewport({ scale }).convertToViewportRectangle(...)` or call
 *   `event.source.getRect(0, 0)`.
 *
 * See the "Coordinate systems" page of the showcase for a worked example.
 */
export interface AnnotationEditorEvent {
    source: any;
    type: 'altTextChanged' | 'removed' | 'sizeChanged' | 'commit' | 'fontSizeChanged' | 'colorChanged' | 'thicknessChanged' | 'opacityChanged' | 'bezierPathChanged' | 'moved' | 'imageAdded' | 'added' | 'commented' | 'commentRemoved' | 'drawingStarted' | 'drawingStopped';
    editorType: string;
    /**
     * Event-specific payload. For `moved`/`sizeChanged`/`added` it holds normalized
     * 0..1 page-relative coordinates (top-left origin) — see the interface docs above.
     */
    value: any;
    previousValue?: any;
    id?: string;
    customId?: string;
}