66 lines
2.4 KiB
JavaScript
66 lines
2.4 KiB
JavaScript
var barcodeBuf = ""
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var barcodeShown = false
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function showBarcode(text) {
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if (!barcodeShown) {
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document.getElementById('barcode').classList.add('shown')
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barcodeShown = true
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}
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document.getElementById('barcodeContent').textContent = text
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}
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function hideBarcode() {
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if (barcodeShown) {
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document.getElementById('barcode').classList.remove('shown')
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barcodeShown = false
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}
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return ""
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}
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function barcodeKeyPress( event ) { // takes input from either keyboard or barcode scanner
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var key = String.fromCharCode( event.charCode )
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var input = document.getElementById( 'crement' )
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var inputcount = document.querySelectorAll( '[type="text"]' ).length + document.querySelectorAll( '[type="number"]' ).length
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if ( input && inputcount == 1 ) { // focus in 'crement' when no other input fields only
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input.focus()
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}
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var focused = document.activeElement
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if ( !focused || focused == document.body ) {
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focused = null
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} else if ( document.querySelector ) {
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focused = document.querySelector( ":focus" )
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}
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if (
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!event.ctrlKey && !event.altKey // no hotkeys used
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&& ( focused == null || focused.tagName != "INPUT" ) // focus not in input fielf for manual input
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) {
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if ( event.keyCode === 13 ) { // carriage return
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var input = document.getElementById( 'barcodeInput' )
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if ( input && barcodeBuf.length > 0 ) {
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input.setAttribute( 'value', barcodeBuf )
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input.parentNode.submit()
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return
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}
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barcodeBuf = ""
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event.preventDefault()
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} else if ( event.keyCode === 27 ) { // escape
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console.log( "escape" )
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barcodeBuf=hideBarcode()
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event.preventDefault()
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} else if ( event.keyCode === 8 ) { // backspace
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console.log( "backspace" )
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barcodeBuf = barcodeBuf.substring( 0, barcodeBuf.length - 1 )
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showBarcode( barcodeBuf )
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if ( barcodeBuf.length <= 0 ) {
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barcodeBuf = hideBarcode()
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}
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event.preventDefault()
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} else if ( event.keyCode == 0 ) { // e.g. F-Keys are 112 to 123, A-Za-z0-9 all are 0.
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console.log( "some input: " + barcodeBuf + "[" + key + "] <= {" + event.keyCode + "}" )
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barcodeBuf += key
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showBarcode( barcodeBuf )
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event.preventDefault()
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}
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}
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}
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