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forward/back navigation through travel forecast with timing

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This commit is contained in:
Matt Walsh 2020-09-04 15:46:31 -05:00
parent f27db7c66e
commit 81378359c9
4 changed files with 108 additions and 46 deletions
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2
README.md
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@ -10,7 +10,7 @@ This project aims to bring back the feel of the 90's with a weather forecast tha
This project is based on the work of [Mike Battaglia](https://github.com/vbguyny/ws4kp). It was forked from his work in August 2020.
* Mike Battaglia For the original project and all of the code which draws the weather displays. This code remains largely intact and was a huge amount of work to get exactly right.
* Mike Battaglia for the original project and all of the code which draws the weather displays. This code remains largely intact and was a huge amount of work to get exactly right. He's also responsible for all of the background graphics including the maps used in the application.
* The team at [TWCClassics](https://twcclassics.com/) for several resources.
* A [font](https://twcclassics.com/downloads.html) set used on the original WeatherStar 4000
* [Icon](https://twcclassics.com/downloads.html) sets

1
server/scripts/modules/latestobservations.js
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@ -15,6 +15,7 @@ class LatestObservations extends WeatherDisplay {
}
async getData(weatherParameters) {
super.getData();
// calculate distance to each station
const stationsByDistance = Object.keys(_StationInfo).map(key => {
const station = _StationInfo[key];

71
server/scripts/modules/travelforecast.js
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@ -9,15 +9,30 @@ class TravelForecast extends WeatherDisplay {
// pre-load background image (returns promise)
this.backgroundImage = utils.image.load('images/BackGround6_1.png');
// height of one city in the travel forecast
this.cityHeight = 72;
// set up the timing
this.timing.baseDelay = 20;
// page sizes are 4 cities, calculate the number of pages necessary plus overflow
const pagesFloat = _TravelCities.length/4;
const pages = Math.floor(pagesFloat) - 1; // first page is already displayed
const extra = pages%1;
const timingStep = this.cityHeight*4;
this.timing.delay = [150];
// add additional pages
for (let i = 0; i < pages; i++) this.timing.delay.push(timingStep);
// add the extra (not exactly 4 pages portion)
if (extra !== 0) this.timing.delay.push(Math.round(this.extra*this.cityHeight));
// add the final 3 second delay
this.timing.delay.push(150);
// get the data
this.getData(weatherParameters);
// scrolling tracking
this.scrollCount = 0;
this.endDelay = 0;
}
async getData() {
super.getData();
const forecastPromises = _TravelCities.map(async city => {
try {
// get point then forecast
@ -70,7 +85,7 @@ class TravelForecast extends WeatherDisplay {
this.longContext.clearRect(0,0,this.longCanvas.width,this.longCanvas.height);
// draw the "long" canvas with all cities
draw.box(this.longContext, 'rgb(35, 50, 112)', 0, 0, 640, 1728);
draw.box(this.longContext, 'rgb(35, 50, 112)', 0, 0, 640, _TravelCities.length*this.cityHeight);
for (let i = 0; i <= 4; i++) {
const y = i * 346;
@ -79,7 +94,7 @@ class TravelForecast extends WeatherDisplay {
await Promise.all(cities.map(async (city, index) => {
// calculate base y value
const y = 50+72*index;
const y = 50+this.cityHeight*index;
// city name
draw.text(this.longContext, 'Star4000 Large Compressed', '24pt', '#FFFF00', 80, y, city.name, 2);
@ -134,34 +149,30 @@ class TravelForecast extends WeatherDisplay {
// copy the scrolled portion of the canvas for the initial run before the scrolling starts
this.context.drawImage(this.longCanvas, 0, 0, 640, 289, 0, 110, 640, 289);
// set up scrolling one time
if (!this.scrollInterval) {
this.scrollInterval = window.setInterval(() => {
if (this.isActive()) {
// get a fresh canvas
const longCanvas = this.getLongCanvas();
// increment scrolling
this.scrollCount++;
// wait 3 seconds at begining
if (this.scrollCount < 150) return;
// calculate scroll offset and don't go past end of canvas
const offsetY = Math.min(longCanvas.height-289, (this.scrollCount-150));
// copy the scrolled portion of the canvas
this.context.drawImage(longCanvas, 0, offsetY, 640, 289, 0, 110, 640, 289);
// track end of scrolling for 3 seconds
if (offsetY >= longCanvas.height-289) this.endDelay++;
// TODO: report playback done
} else {
// reset scroll to top of image
this.scrollCount = 0;
this.endDelay = 0;
}
}, 20);
}
this.finishDraw();
this.setStatus(STATUS.loaded);
}
// screen index change callback just runs the base count callback
screenIndexChange() {
this.baseCountChange(this.navBaseCount);
}
// base count change callback
baseCountChange(count) {
// get a fresh canvas
const longCanvas = this.getLongCanvas();
// calculate scroll offset and don't go past end
let offsetY = Math.min(longCanvas.height-289, (count-this.timing.delay[0]));
// don't let offset go negative
if (offsetY < 0) offsetY = 0;
// copy the scrolled portion of the canvas
this.context.drawImage(longCanvas, 0, offsetY, 640, 289, 0, 110, 640, 289);
}
getTravelCitiesDayName(cities) {
const {DateTime} = luxon;
// effectively returns early on the first found date

72
server/scripts/modules/weatherdisplay.js
View file

@ -63,6 +63,22 @@ class WeatherDisplay {
this.data = undefined;
// set status
this.setStatus(STATUS.loading);
// set up the timing delays
if (Array.isArray(this.timing.delay) && typeof this.timing.delay[0] === 'number') {
// array is defined as how long each screen should be displayed. This needs to be converted into total time for use here
if (!this.timing.fullDelay) {
let sum = 0;
this.timing.fullDelay = this.timing.delay.map(val => {
const calc = sum + val;
sum += val;
return calc;
});
}
}
// update total screens
if (Array.isArray(this.timing.delay)) this.timing.totalScreens = this.timing.delay.length;
}
drawCanvas() {
@ -216,6 +232,9 @@ class WeatherDisplay {
// reset timing
this.startNavCount(navigation.isPlaying());
// if there was a command the canvas has already been drawn
if (navCmd) return;
// refresh the canvas (incase the screen index changed)
if (navCmd) this.drawCanvas();
}
@ -244,8 +263,8 @@ class WeatherDisplay {
// increment the base count
this.navBaseCount++;
// update total screens
if (Array.isArray(this.timing.delay)) this.timing.totalScreens = this.timing.delay.length;
// call base count change if available for this function
if (this.baseCountChange) this.baseCountChange(this.navBaseCount);
// determine type of timing
// simple delay
@ -253,6 +272,16 @@ class WeatherDisplay {
this.navNext();
return;
}
// array of timing integers
if (Array.isArray(this.timing.delay) && typeof this.timing.delay[0] === 'number') {
// scan the array for a matching number and calculate new screen index from the number
const timingMatch = this.timing.fullDelay.indexOf(this.navBaseCount);
// if not found return
if (timingMatch < 0) return;
// navigate to the next screen
this.navNext();
}
}
// navigate to next screen
@ -260,20 +289,24 @@ class WeatherDisplay {
// check for special 'first frame' command
if (command === navigation.msg.command.firstFrame) {
this.resetNavBaseCount();
this.drawCanvas();
return;
}
} else {
// increment screen index
this.screenIndex++;
}
// test for end reached
if (this.screenIndex >= this.timing.totalScreens) {
this.screenIndex = this.timing.totalScreens - 1;
this.sendNavDisplayMessage(navigation.msg.response.next);
this.stopNavBaseCount();
return;
}
// if the end was not reached, update the canvas
this.baseCountFromScreenIndex();
// if the end was not reached, update the canvas (typical), or run a callback (atypical)
if (!this.screenIndexChange) {
this.drawCanvas();
} else {
this.screenIndexChange(this.screenIndex);
}
}
// navigate to previous screen
@ -281,19 +314,36 @@ class WeatherDisplay {
// check for special 'last frame' command
if (command === navigation.msg.command.lastFrame) {
this.screenIndex = this.timing.totalScreens-1;
this.drawCanvas();
return;
}
} else {
// decrement screen index
this.screenIndex--;
}
// test for end reached
if (this.screenIndex < 0) {
this.screenIndex = 0;
this.sendNavDisplayMessage(navigation.msg.response.previous);
return;
}
// if the end was not reached, update the canvas
this.baseCountFromScreenIndex();
// if the end was not reached, update the canvas (typical), or run a callback (atypical)
if (!this.screenIndexChange) {
this.drawCanvas();
} else {
this.screenIndexChange(this.screenIndex);
}
}
// calculate a baseCount from the screen index for the array timings
baseCountFromScreenIndex() {
if (!Array.isArray(this.timing.delay)) return;
// first screen starts at zero
if (this.screenIndex === 0) {
this.navBaseCount = 0;
return;
}
// otherwise return one more than the previous sum
this.navBaseCount = this.timing.fullDelay[this.screenIndex];
}
// start and stop base counter