import { MapInteractionCSS } from 'react-map-interaction';

// This component uses CSS to scale your content.
// Just pass in content as children and it will take care of the rest.
const ThingMap = () => {
  return (
    <MapInteractionCSS>
      <img src="path/to/thing.png" />
    </MapInteractionCSS>
  );
}

import { MapInteraction } from 'react-map-interaction';

// Use MapInteraction if you want to determine how to use the resulting translation.
const NotUsingCSS = () => {
  return (
    <MapInteraction>
      {
        ({ translation, scale }) => { /* Use the passed values to scale content on your own. */ }
      }
    </MapInteraction>
  );
}

import { MapInteractionCSS } from 'react-map-interaction';

// If you want to have control over the scale and translation,
// then use the `scale`, `translation`, and `onChange` props.
class Controlled extends Component {
  constructor(props) {
    super(props);
    this.state = {
      value: {
        scale: 1,
        translation: { x: 0, y: 0 }
      }
    };
  }

  render() {
    const { scale, translation } = this.state;
    return (
      <MapInteractionCSS
        value={this.state.value}
        onChange={(value) => this.setState({ value })}
      >
        <img src="path/to/thing.png" />
      </MapInteractionCSS>
    );
  }
}

{
  value: PropTypes.shape({
    // The scale applied to the dimensions of the contents. A scale of 1 means the
    // contents appear at actual size, greater than 1 is zoomed, and between 0 and 1 is shrunken.
    scale: PropTypes.number,
    // The distance in pixels to translate the contents by.
    translation: PropTypes.shape({ x: PropTypes.number, y: PropTypes.number }),    
  }),

  defaultValue: PropTypes.shape({
    scale: PropTypes.number,
    translation: PropTypes.shape({ x: PropTypes.number, y: PropTypes.number }),
  }),

  // Stops user from being able to zoom, but will still adhere to props.scale
  disableZoom: PropTypes.bool,

  // Stops user from being able to pan. Note that translation can still be
  // changed via zooming, in order to keep the focal point beneath the cursor. This prop does not change the behavior of the `translation` prop.
  disablePan: PropTypes.bool,

  // Apply a limit to the translation in any direction in pixel values. The default is unbounded.
  translationBounds: PropTypes.shape({
    xMin: PropTypes.number, xMax: PropTypes.number, yMin: PropTypes.number, yMax: PropTypes.number
  }),

  // Called with an object { scale, translation }
  onChange: PropTypes.func,

  // The min and max of the scale of the zoom. Must be > 0.
  minScale: PropTypes.number,
  maxScale: PropTypes.number,

  // When 'showControls' is 'true', plus/minus buttons are rendered
  // that let the user control the zoom factor
  showControls: PropTypes.bool,

  // Content to render in each of the control buttons (only when 'showControls' is 'true')
  plusBtnContents: PropTypes.node,
  minusBtnContents: PropTypes.node,

  // Class applied to the controls wrapper (only when 'showControls' is 'true')
  controlsClass: PropTypes.string,

  // Class applied to the plus/minus buttons (only when 'showControls' is 'true')
  btnClass: PropTypes.string,

  // Classes applied to each button separately (only when 'showControls' is 'true')
  plusBtnClass: PropTypes.string,
  minusBtnClass: PropTypes.string,
};

{
  // Function called with an object { translation, scale }
  // translation: { x: number, y: number }, The current origin of the content
  // scale:       number, The current multiplier mapping original coordinates to current coordinates
  children: PropTypes.func,

  // The rest of the prop types are the same as MapInteractionCSS
  ...MapInteractionCSS.propTypes,
}