donner::svg::DonnerController Class Reference

Provides hit-testing and spatial queries for an SVG document. More...

#include "donner/svg/DonnerController.h"

Public Member Functions
	DonnerController (SVGDocument document)
	Create a controller for the given document.
std::optional< SVGGeometryElement >	findIntersecting (const Vector2d &point)
	Finds the topmost geometry element whose rendered area contains the given point.

Detailed Description

Provides hit-testing and spatial queries for an SVG document.

Use DonnerController when you need to determine which element is at a given point (e.g., for mouse interaction in a viewer). This supplements the DOM traversal API on SVGElement with geometry-aware queries.

DonnerController controller(document);
if (auto element = controller.findIntersecting(Vector2d(100, 50))) {
  std::cout << "Hit: " << element->tagName() << "\n";
}

Constructor & Destructor Documentation

DonnerController()

donner::svg::DonnerController::DonnerController ( SVGDocument document )

explicit

Create a controller for the given document.

Parameters

document

The SVG document to query.

Member Function Documentation

findIntersecting()

std::optional< SVGGeometryElement > donner::svg::DonnerController::findIntersecting

(

const Vector2d &

point

)

Finds the topmost geometry element whose rendered area contains the given point.

The point is in SVG canvas coordinates (the same coordinate space as the root <svg> element's viewBox). Returns the deepest matching element in paint order (last painted = topmost).

Parameters

point

Position in canvas coordinates.

Returns

The topmost intersecting geometry element, or std::nullopt if no element is hit.

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The documentation for this class was generated from the following file:

• donner/svg/DonnerController.h