copy png to clipboard #50

src/lib/chartHelper.js

@@ -0,0 +1,40 @@
+import dereference from 'react-chart-editor/lib/lib/dereference'
+import plotly from 'plotly.js'
+
+export function getOptionsFromDataSources (dataSources) {
+  if (!dataSources) {
+    return []
+  }
+
+  return Object.keys(dataSources).map(name => ({
+    value: name,
+    label: name
+  }))
+}
+
+export function getOptionsForSave (state, dataSources) {
+  // we don't need to save the data, only settings
+  // so we modify state.data using dereference
+  const stateCopy = JSON.parse(JSON.stringify(state))
+  const emptySources = {}
+  for (const key in dataSources) {
+    emptySources[key] = []
+  }
+  dereference(stateCopy.data, emptySources)
+  return stateCopy
+}
+
+export async function getImageDataUrl (element, type) {
+  const chartElement = element.querySelector('.js-plotly-plot')
+  return await plotly.toImage(chartElement, {
+    format: type,
+    width: null,
+    height: null
+  })
+}
+
+export default {
+  getOptionsFromDataSources,
+  getOptionsForSave,
+  getImageDataUrl
+}