This example explains how to read control nodes and use the text widget’s HTML feature to style text with auto-sizing background.
Widget used
Functions covered
Composition structure
The composition has one sub-composition called Lower, as you can see in the composition tree.
To see this sub-composition's widgets:
In the composition navigator, select the Widget Explorer tab.
This composition contains three widgets, but for this quick start, you'll look at the text widget, which in the composition is called lowerText.
Composition script
Now that you have located the composition's text widget, learn how to use the text widget’s HTML feature to style text and set a background color in the Lower composition script.
You can also copy and paste the composition script below into your own compositions.
Lower script
(function() {
const HTML_TEMPLATE = '<html><span style="background:{{background-color}}; padding: 0px {{padding-right}}px 0px {{padding-left}}px">{{firstname}} <b>{{secondname}}</b></span></html>';
// convert color JSON to CSS rgba()
const parseColor = function(color) {
const colorRgba = `rgba(${color.r}, ${color.g}, ${color.b}, ${color.a})`;
// console.log("colorRgba =", colorRgba);
return colorRgba;
}
return {
init: function(comp, context) {
// get reference to the fullname widget
const wiLowerText = comp.findWidget("lowerText")[0];
/**********************************************************************/
// we define a function to update the composition
function updateComposition() {
// get control node payload as JSON object
const p = comp.getPayload2();
console.log(p);
const colorRgba = parseColor(p["Background Color"]);
// build HTML text.
let htmlText = HTML_TEMPLATE.replace(/{{background-color}}/gi, colorRgba);
htmlText = htmlText.replace(/{{padding-right}}/gi, p["Padding Right"]);
htmlText = htmlText.replace(/{{padding-left}}/gi, p["Padding Left"]);
htmlText = htmlText.replace(/{{firstname}}/gi, p["Firstname"]);
htmlText = htmlText.replace(/{{secondname}}/gi, p["Lastname"]);
// update fullname text
wiLowerText.setPayload({
"text": htmlText
});
}
/**********************************************************************/
// we listen to payload_changed events
comp.addListener('payload_changed', (event, msg, e) => {
updateComposition();
e.stopPropagation();
});
/**********************************************************************/
// update the composition when loading the output URL
updateComposition();
},
close: function(comp, context) {}
};
})();
Singular control app
Load this to follow along in a real composition
within the same as above and select the Lower composition script.
