102 lines
4.7 KiB
JavaScript
102 lines
4.7 KiB
JavaScript
(function(){
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const api=window.esp32nmea2k;
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if (! api) return;
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//we only do something if a special capability is set
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//on our case this is "testboard"
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//so we only start any action when we receive the init event
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//and we successfully checked that our requested capability is there
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const tabName="example";
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const configName="exampleBDSel";
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const infoUrl='https://github.com/wellenvogel/esp32-nmea2000/tree/master/lib/exampletask';
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let boatItemName;
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let boatItemElement;
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api.registerListener((id, data) => {
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//data is capabilities
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//check if our requested capability is there (see GwExampleTask.h)
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if (!data.testboard) return; //do nothing if we are not active
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//add a simple additional tab page
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//you will have to build the content of the page dynamically
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//using normal dom manipulation methods
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//you can use the helper addEl to create elements
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let page = api.addTabPage(tabName, "Example");
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api.addEl('div', 'hdg', page, "this is a test tab");
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let vrow = api.addEl('div', 'row', page);
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api.addEl('span', 'label', vrow, 'loops: ');
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let lcount = api.addEl('span', 'value', vrow, '0');
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//query the loop count
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window.setInterval(() => {
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fetch('/api/user/exampleTask/data')
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.then((res) => {
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if (!res.ok) throw Error("server error: " + res.status);
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return res.text();
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})
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.then((txt) => {
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//set the text content of our value element with what we received
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lcount.textContent = txt;
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})
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.catch((e) => console.log("rq:", e));
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}, 1000);
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api.addEl('button', '', page, 'Info').addEventListener('click', function (ev) {
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window.open(infoUrl, 'info');
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})
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//add a tab for an external URL
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api.addTabPage('exhelp', 'Info', infoUrl);
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//now as we know we are active - register all the listeners we need
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api.registerListener((id, data) => {
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console.log("exampletask status listener", data);
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}, api.EVENTS.status)
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api.registerListener((id, data) => {
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if (data === tabName) {
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//maybe we need some activity when our page is being activated
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console.log("example tab activated");
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}
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}, api.EVENTS.tab);
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api.registerListener((id, data) => {
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//we have a configuration that
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//gives us the name of a boat data item we would like to
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//handle special
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//in our case we just use an own formatter and add some
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//css to the display field
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//as this item can change we need to keep track of the
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//last item we handled
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let nextboatItemName = data[configName];
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console.log("value of " + configName, nextboatItemName);
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if (nextboatItemName) {
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//register a user formatter that will be called whenever
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//there is a new valid value
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//we simply add an "X:" in front
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api.addUserFormatter(nextboatItemName, "m(x)", function (v, valid) {
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if (!valid) return;
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return "X:" + v;
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})
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//after this call the item will be recreated
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}
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if (boatItemName !== undefined && boatItemName != nextboatItemName) {
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//if the boat item that we handle has changed, remove
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//the previous user formatter (this will recreate the item)
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api.removeUserFormatter(boatItemName);
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}
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boatItemName = nextboatItemName;
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boatItemElement = undefined;
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}, api.EVENTS.config);
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api.registerListener((id, data) => {
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//this event is called whenever a data item has
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//been created (or recreated)
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//if this is the item we handle, we just add a css class
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//we could also completely rebuild the dom below the element
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//and use our formatter to directly write/draw the data
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//avoid direct manipulation of the element (i.e. changing the classlist)
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//as this element remains there all the time
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if (boatItemName && boatItemName == data.name) {
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boatItemElement = data.element;
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//use the helper forEl to find elements within the dashboard item
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//the value element has the class "dashValue"
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api.forEl(".dashValue", function (el) {
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el.classList.add("examplecss");
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}, boatItemElement);
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}
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}, api.EVENTS.dataItemCreated);
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}, api.EVENTS.init);
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})();
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