irc_web/.svn/pristine/c1/c1f76c9153c7e4e31b226edb49c66e1bac82dbae.svn-base

/* eslint no-loop-func: 0 */ // --> OFF
import * as cornerstoneTools from 'cornerstone-tools'
const getPixelSpacing = cornerstoneTools.import('util/getPixelSpacing')
import updatePerpendicularLineHandles from './updatePerpendicularLineHandles'
const getModule = cornerstoneTools.getModule
const getToolState = cornerstoneTools.getToolState
const toolStyle = cornerstoneTools.toolStyle
const toolColors = cornerstoneTools.toolColors
const getNewContext = cornerstoneTools.import('drawing/getNewContext')
const draw = cornerstoneTools.import('drawing/draw')
const setShadow = cornerstoneTools.import('drawing/setShadow')
const drawLine = cornerstoneTools.import('drawing/drawLine')
const drawLinkedTextBox = cornerstoneTools.import('drawing/drawLinkedTextBox')
const drawHandles = cornerstoneTools.import('drawing/drawHandles')

export default function(evt) {
  const eventData = evt.detail
  const { element, canvasContext, image } = eventData
  const {
    handleRadius,
    drawHandlesOnHover,
    hideHandlesIfMoving,
    renderDashed
  } = this.configuration

  const lineDash = getModule('globalConfiguration').configuration.lineDash

  // If we have no toolData for this element, return immediately as there is nothing to do
  const toolData = getToolState(element, this.name)

  if (!toolData) {
    return
  }

  const { rowPixelSpacing, colPixelSpacing } = getPixelSpacing(image)

  // LT-29 Disable Target Measurements when pixel spacing is not available
  if (!rowPixelSpacing || !colPixelSpacing) {
    return
  }

  // We have tool data for this element - iterate over each one and draw it
  const context = getNewContext(canvasContext.canvas)

  let color
  const lineWidth = toolStyle.getToolWidth()

  for (let i = 0; i < toolData.data.length; i++) {
    const data = toolData.data[i]

    if (data.visible === false) {
      continue
    }

    color = toolColors.getColorIfActive(data)

    // Calculate the data measurements
    if (data.invalidated === true) {
      if (data.longestDiameter && data.shortestDiameter) {
        this.throttledUpdateCachedStats(image, element, data)
      } else {
        this.updateCachedStats(image, element, data)
      }
    }

    draw(context, context => {
      // Configurable shadow
      setShadow(context, this.configuration)

      const {
        start,
        end,
        perpendicularStart,
        perpendicularEnd,
        textBox
      } = data.handles

      const lineOptions = { color }
      const perpendicularLineOptions = { color, strokeWidth }

      if (renderDashed) {
        lineOptions.lineDash = lineDash
        perpendicularLineOptions.lineDash = lineDash
      }

      // Draw the measurement line
      drawLine(context, element, start, end, lineOptions)

      // Draw perpendicular line
      const strokeWidth = lineWidth

      updatePerpendicularLineHandles(eventData, data)

      drawLine(
        context,
        element,
        perpendicularStart,
        perpendicularEnd,
        perpendicularLineOptions
      )

      // Draw the handles
      const handleOptions = {
        color,
        handleRadius,
        drawHandlesIfActive: drawHandlesOnHover,
        hideHandlesIfMoving
      }

      // Draw the handles
      if (this.configuration.drawHandles) {
        drawHandles(context, eventData, data.handles, handleOptions)
      }

      // Draw the textbox
      // Move the textbox slightly to the right and upwards
      // So that it sits beside the length tool handle
      const xOffset = 10
      const textBoxAnchorPoints = handles => [
        handles.start,
        handles.end,
        handles.perpendicularStart,
        handles.perpendicularEnd
      ]

      const textLines = getTextBoxText(data, rowPixelSpacing, colPixelSpacing)
      if (data.hasOwnProperty('remark')) {
        textLines.unshift(data.remark)
      }
      drawLinkedTextBox(
        context,
        element,
        textBox,
        textLines,
        data.handles,
        textBoxAnchorPoints,
        color,
        lineWidth,
        xOffset,
        true
      )
    })
  }
}

const getTextBoxText = (data, rowPixelSpacing, colPixelSpacing) => {
  let suffix = ' mm'

  if (!rowPixelSpacing || !colPixelSpacing) {
    suffix = ' pixels'
  }

  const lengthText = ` L ${data.longestDiameter}${suffix}`
  const widthText = ` W ${data.shortestDiameter}${suffix}`

  const { labels } = data

  if (labels && Array.isArray(labels)) {
    return [...labels, lengthText, widthText]
  }

  return [lengthText, widthText]
}