How to calculate the width of the node based on it's label in JavaScript Diagram?
Calculate Node width based on annotation bounds
The textChange event in the JavaScript Diagram will get invoked when changes happened in the label. Using this event, calculate the size of the node based on the changes in the label.
Please refer to the code example and sample link as follows.
JS
function labelChanged(evt) {
if (!evt.element.segments) {
var diagram = $("#diagram").ejDiagram("instance");
var node = evt.element;
var labelElement = document.getElementById(node.name+"_"+evt.label.name);
var oldContent = labelElement.innerHTML;
labelElement.innerHTML = evt.value;
labelElement.parentNode.style.display = "block"
var rect = labelElement.getBoundingClientRect();
labelElement.innerHTML = oldContent;
labelElement.parentNode.style.display = "none";
diagram.updateNode(node.name, {width: rect.width});
if(rect.height > node.height){
diagram.updateNode(node.name, {height: rect.height});
}
}
}
$("#diagram").ejDiagram({
width: "100%",
height: "600px",
nodes: nodes,
//textChangeEvent
textChange: labelChanged,
},
});
Sample link:
Conclusion
I hope you enjoyed learning about how to change the node width by using text change event in JavaScript Diagram.
You can refer to our JavaScript Diagram feature tour page to know about its other groundbreaking feature representations and documentation, and how to quickly get started for configuration specifications. You can also explore our JavaScript Diagram example to understand how to create and manipulate data.
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