uibuilder, VueJS and SVG: Quick floorplan IoT example
UPDATE March 2023: There is now a shiny new version of this example that uses vanilla HMTL and no longer needs a framework. Please check it out at uibuilder dynamic SVG example - no framework needed (flows.nodered.org).
This was inspired by Steve and Bart's SVG addon for Dashboard. It made me wonder how hard it would be to combine an SVG floorplan with SVG icons showing things like whether lights are on or off and even being able to control them.
Well, turns out that it is crazy simple!
So I created a simple VueJS component which means that all you have to do is write a couple of lines of HTML & a few lines of JavaScript then you have a fully dynamic visual floorplan with IoT overlays.
The flow to drive this is also trivial.
The flow seems rather long because of the embedded SVG data, be patient when pasting it. Note that the html and js files seem a bit long as well but that is only because the component is embedded, normally that would be in a separate file.
The flow contains the html and JavaScript as well as the SVG floorplan used for the background. Just copy the content of the SVG to a file called background.svg then copy/paste the html and JavaScript to the appropriate files.
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clone\n * @param {object} [ui] Optional uib UI object that will apply changes to the cloned element (e.g. attribs, slot)\n */\nfunction htmlClone(template, parent, ui) {\n console.log(ui)\n if (!template || !(template instanceof Element)) {\n console.error('Template HTMLElement not provided or is not an HTML Element')\n return\n }\n if (!parent || !(parent instanceof Element)) {\n console.error('Parent HTMLElement not provided or is not an HTML Element')\n return\n }\n if (!ui) ui = {}\n if (!ui.position) ui.position = 'last'\n\n const clone = template.cloneNode(true)\n\n // Oops! Fns starting with `_` should not have been used - sorry. This fn no longer available directly.\n // Will add an equivalent in a future release (post v6.4.1) probably called `uiEnhanceElement`\n // uibuilder._uiComposeComponent(clone, ui)\n clone.id = ui.id\n clone.classList.add(ui.attributes['data-posn'])\n clone.dataset.state = ui.attributes['data-state']\n clone.dataset.posn = ui.attributes['data-posn']\n clone.onclick = doMe //uibuilder.eventSend\n\n if (ui.position === 'first') {\n // Insert new el before the first child of the parent. Ref: https://developer.mozilla.org/en-US/docs/Web/API/Node/insertBefore#example_3\n parent.insertBefore(clone, parent.firstChild)\n } else if (Number.isInteger(Number(ui.position))) {\n elParent.insertBefore(clone, parent.children[ui.position])\n } else {\n // Append to the required parent\n parent.appendChild(clone)\n }\n\n}\nconst x = {\n \"id\": \"bulb1\",\n \"attributes\": {\n \"class\": \"bulb posn1\",\n \"data-state\": \"off\",\n \"data-posn\": \"posn1\"\n },\n \"events\": {\n \"click\": \"uibuilder.eventSend\"\n },\n \"position\": \"last\"\n}\n\n// The Template tag in index.html contains a template \"bulb\" SVG image\n// Here, we clone that multiple times and set some properties.\n// Note that `htmlClone` is a function that will land in the uibuilder client in v6.2\n// Also, the $ function is improved in v6.2 so a copy of that is included here for convenience.\n//\n// We track state and position class on data-* attributes so that it is much easier to process\n// click events in Node-RED without having to create a custom click handler, we can just use the standard eventSend.\n// CSS classes do all the clever stuff 😁\n\nhtmlClone($('#bulb-template'), $('#floorplan'), {\n // As always, we set a unique ID for every created element so it can be updated easily later\n id: 'bulb1',\n // You only need this if you want to choose 'first' or a position number,\n // the clone will be added at the specified child position of the parent.\n // position: 'last', \n attributes: {\n // Apply base bulb class and a positioning class\n class: 'bulb posn1',\n // Track the on/off state separately - makes processing in Node-RED easier\n 'data-state': 'off',\n // Track the position class separately - makes processing in Node-RED easier\n 'data-posn': 'posn1'\n },\n // We have to add event handlers after a clone, they cannot be included in the template\n events: {\n click: 'uibuilder.eventSend'\n }\n})\n\nhtmlClone(mySelector('#bulb-template'), mySelector('#floorplan'), {\n id: 'bulb2',\n attributes: {\n class: 'bulb posn2',\n 'data-state': 'off',\n 'data-posn': 'posn2'\n },\n events: {\n click: 'uibuilder.eventSend'\n }\n})\n\nhtmlClone(mySelector('#bulb-template'), mySelector('#floorplan'), {\n id: 'bulb3',\n attributes: {\n class: 'bulb posn3',\n 'data-state': 'off',\n 'data-posn': 'posn3'\n },\n events: {\n click: 'uibuilder.eventSend'\n }\n})\n\nhtmlClone(mySelector('#bulb-template'), mySelector('#floorplan'), {\n id: 'bulb4',\n attributes: {\n class: 'bulb posn4',\n 'data-state': 'off',\n 'data-posn': 'posn4'\n },\n events: {\n click: 'uibuilder.eventSend'\n },\n})\n","x":730,"y":520,"wires":[]},{"id":"5dce296a96d3f95e","type":"comment","z":"278e7d113ed09433","g":"2e40ef6c2172741a","name":"background.svg","info":"Can't include this directly here otherwise\nthe flow cannot be posted to the forum.\n\nThe example background file can be obtained\nhere:\n\nhttps://gist.github.com/TotallyInformation/02eb3716157db586f3f5b8a85c241009#file-background-svg\n\nCopy the text out of it and paste into a new \nfile, `background1.svg` in the same location \nas your `index.html` file.\n","x":760,"y":560,"wires":[]}]
