.on('end', function () {
turnOffCrosshair(selection)
// Clear brush
var rect = d3BrushSelection(this)
if (rect === null) {
if (clearingFlag) {
clearingFlag = false
} else {
// Empty selection, deselect all
map.select_none()
}
} else {
// Not empty, then clear the box
clearingFlag = true
selection.call(brush.move, null)
}
})
.on('brush', function () {
const shiftKeyOn = event.sourceEvent.shiftKey
const rect = d3BrushSelection(this)
// Check for no selection (e.g. after clearing brush)
if (rect !== null) {
// When shift is pressed, ignore the currently selected nodes.
// Otherwise, brush all nodes.
var selection = shiftKeyOn
? selectableSelection.selectAll('.node:not(.selected),.text-label:not(.selected)')
: selectableSelection.selectAll('.node,.text-label')
selection.classed('selected', d => {
const sx = d.x
const sy = d.y
return (rect[0][0] <= sx && sx < rect[1][0] &&
rect[0][1] <= sy && sy < rect[1][1])
})
}
})