Hey there,
I m trying to give the feedback of a canvas element into node-red using a templade node. unfortunately I can't do that at the moment
<style>
.wrapper {
position: relative;
width: 400px;
height: 200px;
-moz-user-select: none;
-webkit-user-select: none;
-ms-user-select: none;
user-select: none;
}
img {
position: absolute;
left: 0;
top: 0;
}
.signature-pad {
position: absolute;
left: 0;
top: 0;
width:400px;
height:200px;
}
</style>
<h1>
Draw over image
</h1>
<div class="wrapper" style="background-color:white;">
<canvas id="signature-pad" class="signature-pad" width=400 height=200></canvas>
</div>
<div>
<button id="save">Save</button>
<button id="clear">Clear</button>
</div>
<script>
var signaturePad = new SignaturePad(document.getElementById('signature-pad'), {
backgroundColor: 'rgba(255, 255, 255, 0)',
penColor: 'rgb(0, 0, 0)'
});
var saveButton = document.getElementById("save");
var cancelButton = document.getElementById('clear');
saveButton.addEventListener('click', function (event) {
var data = signaturePad;
this.scope.action = function() {return data;}
});
cancelButton.addEventListener('click', function (event) {
signaturePad.clear();
});
</script>