irc_web/.svn/pristine/f2/f25036af9c9edd2e9182249c036e0da9381f385f.svn-base

import * as cornerstoneTools from 'cornerstone-tools'
const external = cornerstoneTools.external
import getOrientationString from './getOrientationString'
import invertOrientationString from './invertOrientationString'
// const getOrientationString = cornerstoneTools.import('orientation/getOrientationString')
// const invertOrientationString = cornerstoneTools.import('orientation/invertOrientationString')
const getNewContext = cornerstoneTools.import('drawing/getNewContext')
const drawTextBox = cornerstoneTools.import('drawing/drawTextBox')
const textBoxWidth = cornerstoneTools.import('drawing/textBoxWidth')
const toolColors = cornerstoneTools.toolColors

/**
 * @public
 * @class OrientationMarkersTool
 * @memberof Tools
 *
 * @classdesc Tool for displaying orientation markers on the image.
 * @extends Tools.Base.BaseTool
 */
export default class OrientationMarkersTool extends cornerstoneTools.OrientationMarkersTool {
  constructor(props = {}) {
    const defaultProps = {
      name: 'OrientationMarkers',
      configuration: {
        drawAllMarkers: true
      },
      mixins: ['enabledOrDisabledBinaryTool']
    }

    super(props, defaultProps)
  }

  enabledCallback(element) {
    this.forceImageUpdate(element)
  }

  disabledCallback(element) {
    this.forceImageUpdate(element)
  }

  forceImageUpdate(element) {
    const cornerstone = external.cornerstone
    const enabledElement = cornerstone.getEnabledElement(element)

    if (enabledElement.image) {
      cornerstone.updateImage(element)
    }
  }

  renderToolData(evt) {
    const eventData = evt.detail
    const context = getNewContext(eventData.canvasContext.canvas)
    const element = eventData.element
    const markers = getOrientationMarkers(element)

    if (!markers) {
      return
    }

    const coords = getOrientationMarkerPositions(element, markers)

    const color = toolColors.getToolColor()

    const textWidths = {
      top: textBoxWidth(context, markers.top, 0),
      left: textBoxWidth(context, markers.left, 0),
      right: textBoxWidth(context, markers.right, 0),
      bottom: textBoxWidth(context, markers.bottom, 0),
      height: textBoxWidth(context, 'M', 0) // Trick to get an approximation of the height of the text
    }

    drawTopLeftText(context, markers, coords, textWidths, color)
    if (this.configuration.drawAllMarkers) {
      drawBottomRightText(context, markers, coords, textWidths, color)
    }
  }
}

const drawTopLeftText = (context, markers, coords, textWidths, color) => {
  drawTextBox(
    context,
    markers.top,
    coords.top.x - textWidths.top / 2,
    coords.top.y,
    color
  )
  drawTextBox(
    context,
    markers.left,
    coords.left.x - textWidths.left / 2,
    coords.left.y,
    color
  )
}

const drawBottomRightText = (context, markers, coords, textWidths, color) => {
  drawTextBox(
    context,
    markers.right,
    coords.right.x - textWidths.right,
    coords.right.y,
    color
  )
  drawTextBox(
    context,
    markers.bottom,
    coords.bottom.x - textWidths.bottom / 2,
    coords.bottom.y - textWidths.height,
    color
  )
}

const getOrientationMarkers = element => {
  const cornerstone = external.cornerstone
  const enabledElement = cornerstone.getEnabledElement(element)
  const imagePlane = cornerstone.metaData.get(
    'imagePlaneModule',
    enabledElement.image.imageId
  )

  if (!imagePlane || !imagePlane.rowCosines || !imagePlane.columnCosines) {
    return
  }
  const row = getOrientationString(imagePlane.rowCosines)
  const column = getOrientationString(imagePlane.columnCosines)
  const oppositeRow = invertOrientationString(row)
  const oppositeColumn = invertOrientationString(column)

  return {
    top: oppositeColumn,
    bottom: column,
    left: oppositeRow,
    right: row
  }
}

const getOrientationMarkerPositions = element => {
  const enabledElement = external.cornerstone.getEnabledElement(element)
  const top = external.cornerstone.pixelToCanvas(element, {
    x: enabledElement.image.width / 2,
    y: 5
  })
  const bottom = external.cornerstone.pixelToCanvas(element, {
    x: enabledElement.image.width / 2,
    y: enabledElement.image.height - 15
  })
  const left = external.cornerstone.pixelToCanvas(element, {
    x: 5,
    y: enabledElement.image.height / 2
  })
  const right = external.cornerstone.pixelToCanvas(element, {
    x: enabledElement.image.width - 10,
    y: enabledElement.image.height / 2
  })

  return {
    top,
    bottom,
    left,
    right
  }
}