Andrew, some home work for you tomorrow...
I have updated the code to also handle repeat buttons - try to implement them.
PS, backup your flows first 
Dont worry, the idea is exactly the same (add some attributes to a button then magic happens automatically)
Visual Demo
note...
holding VOL buttons sends repeat messages
the lock button is font awesome (the rest are material design)
The flow
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md-48\">volume_mute</i>\n </md-button>\n</div>\n","storeOutMessages":true,"fwdInMessages":true,"templateScope":"local","x":850,"y":300,"wires":[[]],"info":" class=\"material-icons\"> volume_off"},{"id":"6eeb00d0.da35b","type":"ui_template","z":"e1dfad68.fee2a","group":"a381801e.309e1","name":"vol + *","order":14,"width":1,"height":1,"format":"<div>\n <md-button class=\"md-button remote-button\" \n data-buttontype=\"repeater\"\n data-interval=\"200\"\n data-topic=\"volume/plus\"\n data-payload=\"volume/plus\"\n aria-label=\"volume plus\"\n >\n <span class=\"fa fa-plus remote-icon\"> </span>\n </md-button>\n</div>\n\n\n","storeOutMessages":true,"fwdInMessages":false,"templateScope":"local","x":730,"y":300,"wires":[[]],"info":"<div id=\"regular_plus\">\n <md-button class=\"md-button remote-button\">\n <i class=\"fa fa-plus remote-icon\"></i>\n </md-button>\n</div>"},{"id":"c58bb5ab.ebc658","type":"ui_template","z":"e1dfad68.fee2a","group":"a381801e.309e1","name":"vol - 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loaded\n //(may not be necessary!)\n setTimeout(function() {\n //debugger\n $scope.init();\n },100);\n \n var BUTTON_CLASS = \".remote-button\";\n\n /** \n * Initialise all buttons with class BUTTON_CLASS\n */\n $scope.init = function () {\n //debugger\n console.log(\"$scope.init called. Adding event handlers to all buttons with class '\" + BUTTON_CLASS + \"'.\");\n var clickButtons = $(BUTTON_CLASS + \":not([data-buttontype='repeater'])\") \n clickButtons.click(function(e){\n //debugger\n var btn = $(this)\n var type = btn.data(\"buttontype\");//get the button type from attribute data-buttontype=\"xxxxx\"\n var topic = btn.data(\"topic\");//get the topic from attribute data-topic=\"xxxxx\"\n var payload = btn.data(\"payload\");//get the payload from attribute data-payload=\"xxxxx\"\n \n if(type == \"toggle\"){\n var newPayload = payload == 1 ? 0 : 1;\n setButtonState(btn,newPayload)\n $scope.send({\"topic\":topic,\"payload\":newPayload})\n } else {\n $scope.send({\"topic\":topic,\"payload\":payload})\n }\n }); \n\n var repeatButtons = $(BUTTON_CLASS + \"[data-buttontype='repeater']\") \n repeatButtons.on('mousedown',function(e) {\n var btn = $(this);\n if(this._intervalId) return; //already in operation\n var topic = btn.data(\"topic\");//get the topic from attribute data-topic=\"xxxxx\"\n var payload = btn.data(\"payload\");//get the payload from attribute data-payload=\"xxxxx\"\n var interval = btn.data(\"interval\");//get the desired repeat duration\n if(isNumeric(interval) == false || interval < 1) interval = 300;//prevent zero & non numeric timeout value\n this._intervalId = setInterval(function() {\n $scope.send({\"topic\":topic,\"payload\":payload})\n },interval); \n }).on('mouseup blur focusout',function(e) {\n var btn = $(this);\n if(this._intervalId){\n clearInterval(this._intervalId);\n this._intervalId = null;\n }\n });\n \n };\n \n //watch for node-red msgs\n $scope.$watch('msg', function(msg) {\n //debugger\n if(!msg){ //if no msg \n console.log(\"$scope.$watch('msg', ...) - msg is empty\");\n return;\n }\n if(!msg.topic){ //if no topic set found\n console.log(\"msg.topic is empty - cannot match this to any button\")\n return; //stop processing!\n }\n var buttonSelector = \".remote-button[data-topic='\" + msg.topic + \"']\" \n var $btn = $(buttonSelector);//get the button\n \n if(!$btn.length){ //if no button found\n console.log(buttonSelector + \" not found - cannot set state\")\n return; //stop processing!\n }\n \n if($btn.length > 1){ //if MORE than one button found\n console.log(buttonSelector + \" found more than 1 button - is this intended? Do you have the same data-topic set on multiple buttons?\")\n }\n \n if($btn.data(\"buttontype\") === \"toggle\"){\n if(msg.payload == \"1\"){\n setButtonState($btn, 1);\n } else if(msg.payload == \"0\"){\n setButtonState($btn, 0);\n } else {\n console.log(\"Invalid toggle value in msg.payload, cannot set \" + buttonSelector + \". Ensure msg.payload is either 0 or 1\") \n }\n }\n\n }); \n \n /** \n * helper function to set the correct icon & update the \"data-payload\" memory \n */\n function setButtonState($btn, state){\n \n $btn.data(\"payload\", state);//set data-payload to new state value (used as a memory)\n \n //determine the opposite state\n var oppositeState;\n if(state == \"1\" || state === 1){\n state = 1; //normalise to a number\n oppositeState = 0;\n } else {\n state = 0; //normalise to a number\n oppositeState = 1;\n }\n \n var $icon = $btn.find(\"i\"); //get the <i> element\n if(!$icon.length){\n $icon = $btn.find(\"span\"); //get the <span> element instead!\n }\n if(!$icon.length){\n console.log(\"<i> or <span> not found inside button - cant toggle the icon!\")\n return;//exit this function - nothing to toggle!\n }\n \n //get the old icon and new icon names\n var oldIcon = $btn.data(\"icon\" + oppositeState); //get icon1 or icon2 depending on oppositeState\n var newIcon = $btn.data(\"icon\" + state); //get icon1 or icon2 depending on newPayload\n \n //if we have newIcon and an actual DOM element ($icon) - update it...\n if(newIcon && $icon.length){\n if(newIcon.includes(\"fa-\")){ \n $icon.removeClass(oldIcon).addClass(newIcon); // fontawesome\n } else { \n $icon.text(newIcon); // MDI\n }\n }\n }\n \n /** \n * helper function to determine a value is REALLY a number \n */\n function isNumeric(n){\n if(n === \"\") return false;\n if(n === true || n === false) return false;\n return !isNaN(parseFloat(n)) && isFinite(n);\n }\n \n\n})(scope);\n</script>","storeOutMessages":true,"fwdInMessages":true,"templateScope":"local","x":850,"y":540,"wires":[["a90df8f.7eac108"]]},{"id":"a90df8f.7eac108","type":"debug","z":"e1dfad68.fee2a","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","x":930,"y":480,"wires":[]},{"id":"b5beb822.d8e4d8","type":"ui_template","z":"e1dfad68.fee2a","group":"a381801e.309e1","name":"lock","order":23,"width":"1","height":"1","format":"<div>\n <md-button class=\"md-button remote-button bigger\" \n data-payload=\"0\" \n data-buttontype=\"toggle\"\n data-topic=\"lock\"\n data-icon0=\"fa-unlock\"\n data-icon1=\"fa-lock\"\n aria-label=\"lock\"\n >\n <span class=\"fa fa-unlock\" aria-hidden=\"true\"> </span>\n </md-button>\n</div>","storeOutMessages":true,"fwdInMessages":true,"templateScope":"local","x":850,"y":420,"wires":[[]]},{"id":"be17d3d4.a92a6","type":"ui_group","z":"","name":"HOME","tab":"6af80cca.442cb4","order":1,"disp":true,"width":3,"collapse":false},{"id":"a381801e.309e1","type":"ui_group","z":"","name":"Full_Remote2","tab":"9e72c753.ebf048","order":3,"disp":false,"width":"3","collapse":false},{"id":"6af80cca.442cb4","type":"ui_tab","z":"","name":"TEST","icon":"dashboard","order":3,"disabled":false,"hidden":false},{"id":"9e72c753.ebf048","type":"ui_tab","z":"","name":"HDMI_TV_control","icon":"dashboard","order":7,"disabled":false,"hidden":false}]
How it works...
NOTE: All of the below code snippets are in the FLOW above (no real need to copy paste this) - these are for you to use as a reference.
A normal / simple button...
<div>
<md-button class="md-button remote-button bigger"
data-topic="7"
data-payload="7">7
</md-button>
</div>
Toggle buttons
Material Icon toggle...
<div>
<md-button id="mute-button" class="md-button remote-button"
data-payload="1"
data-buttontype="toggle"
data-topic="mute"
data-icon0="volume_off"
data-icon1="volume_mute"
aria-label="volume mute"
>
<i class="material-icons md-48">volume_mute</i>
</md-button>
</div>
font awesome Icon toggle...
<div>
<md-button class="md-button remote-button bigger"
data-payload="0"
data-buttontype="toggle"
data-topic="lock"
data-icon0="fa-unlock"
data-icon1="fa-lock"
aria-label="lock"
>
<span class="fa fa-unlock" aria-hidden="true"> </span>
</md-button>
</div>
A repeater button (set to resend every 200ms while pressed)
<div>
<md-button class="md-button remote-button"
data-buttontype="repeater"
data-interval="200"
data-topic="volume/plus"
data-payload="volume/plus"
aria-label="volume plus"
>
<span class="fa fa-plus remote-icon"> </span>
</md-button>
</div>
the script that handles all the .remote-button buttons...
<div>
<!--diliberately emtpy - only need the script below -->
</div>
<script>
(function($scope) {
//debugger
//cause a small delay while things load
//ideally this would be an init event or on all parts of document loaded
//(may not be necessary!)
setTimeout(function() {
//debugger
$scope.init();
},100);
var BUTTON_CLASS = ".remote-button"; // The class we want this code to handle. Code will only work for buttons with this class!
/**
* Initialise event handlers all buttons with class BUTTON_CLASS
*/
$scope.init = function () {
//debugger
console.log("$scope.init called. Adding event handlers to all buttons with class '" + BUTTON_CLASS + "'.");
var clickButtons = $(BUTTON_CLASS + ":not([data-buttontype='repeater'])")
clickButtons.click(function(e){
//debugger
var btn = $(this)
var type = btn.data("buttontype");//get the button type from attribute data-buttontype="xxxxx"
var topic = btn.data("topic");//get the topic from attribute data-topic="xxxxx"
var payload = btn.data("payload");//get the payload from attribute data-payload="xxxxx"
if(type == "toggle"){
var newPayload = payload == 1 ? 0 : 1;
setButtonState(btn,newPayload)
$scope.send({"topic":topic,"payload":newPayload})
} else {
$scope.send({"topic":topic,"payload":payload})
}
});
var repeatButtons = $(BUTTON_CLASS + "[data-buttontype='repeater']")
repeatButtons.on('mousedown',function(e) {
var btn = $(this);
if(this._intervalId) return; //already in operation
var topic = btn.data("topic");//get the topic from attribute data-topic="xxxxx"
var payload = btn.data("payload");//get the payload from attribute data-payload="xxxxx"
var interval = btn.data("interval");//get the desired repeat duration
if(isNumeric(interval) == false || interval < 1) interval = 300;//prevent zero & non numeric timeout value
this._intervalId = setInterval(function() {
$scope.send({"topic":topic,"payload":payload})
},interval);
}).on('mouseup blur focusout',function(e) {
var btn = $(this);
if(this._intervalId){
clearInterval(this._intervalId);
this._intervalId = null;
}
});
};
//watch for node-red msgs
$scope.$watch('msg', function(msg) {
//debugger
if(!msg){ //if no msg
console.log("$scope.$watch('msg', ...) - msg is empty");
return;
}
if(!msg.topic){ //if no topic set found
console.log("msg.topic is empty - cannot match this to any button")
return; //stop processing!
}
var buttonSelector = ".remote-button[data-topic='" + msg.topic + "']"
var $btn = $(buttonSelector);//get the button
if(!$btn.length){ //if no button found
console.log(buttonSelector + " not found - cannot set state")
return; //stop processing!
}
if($btn.length > 1){ //if MORE than one button found
console.log(buttonSelector + " found more than 1 button - is this intended? Do you have the same data-topic set on multiple buttons?")
}
if($btn.data("buttontype") === "toggle"){
if(msg.payload == "1"){
setButtonState($btn, 1);
} else if(msg.payload == "0"){
setButtonState($btn, 0);
} else {
console.log("Invalid toggle value in msg.payload, cannot set " + buttonSelector + ". Ensure msg.payload is either 0 or 1")
}
}
});
/**
* helper function to set the correct icon & update the "data-payload" memory
*/
function setButtonState($btn, state){
$btn.data("payload", state);//set data-payload to new state value (used as a memory)
//determine the opposite state
var oppositeState;
if(state == "1" || state === 1){
state = 1; //normalise to a number
oppositeState = 0;
} else {
state = 0; //normalise to a number
oppositeState = 1;
}
var $icon = $btn.find("i"); //get the <i> element
if(!$icon.length){
$icon = $btn.find("span"); //get the <span> element instead!
}
if(!$icon.length){
console.log("<i> or <span> not found inside button - cant toggle the icon!")
return;//exit this function - nothing to toggle!
}
//get the old icon and new icon names
var oldIcon = $btn.data("icon" + oppositeState); //get icon1 or icon2 depending on oppositeState
var newIcon = $btn.data("icon" + state); //get icon1 or icon2 depending on newPayload
//if we have newIcon and an actual DOM element ($icon) - update it...
if(newIcon && $icon.length){
if(newIcon.includes("fa-")){
$icon.removeClass(oldIcon).addClass(newIcon); // fontawesome
} else {
$icon.text(newIcon); // MDI
}
}
}
/**
* helper function to determine a value is REALLY a number
*/
function isNumeric(n){
if(n === "") return false;
if(n === true || n === false) return false;
return !isNaN(parseFloat(n)) && isFinite(n);
}
})(scope);
</script>
