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ock now has ROman Numeral support

master
adrian w kirk 2021-03-13 00:07:36 +00:00
parent cc68a1be1c
commit 4d71953cae
2 changed files with 209 additions and 36 deletions
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2
apps.json
View File

@ -229,7 +229,7 @@
{ "id": "sweepclock",
"name": "Sweep Clock",
"icon": "sweepclock.png",
"version":"0.02",
"version":"0.03",
"description": "Smooth sweep secondhand with single hour numeral",
"tags": "clock",
"type":"clock",

243
apps/sweepclock/sweepclock.js
View File

@ -1,9 +1,28 @@
/**
* Adrian Kirk 2021-03
* Simple Clock showing 1 numeral for the hour
* with a smooth sweep second.
*/
const screen_center_x = g.getWidth()/2;
const screen_center_y = g.getHeight()/2;
require("FontCopasetic40x58Numeric").add(Graphics);
class Hand {
/**
* Pure virtual class for all Hand classes to extend.
* a hand class will have 1 main function
* moveTo which will move the hand to the given angle.
*/
moveTo(angle){}
}
class ThinHand extends Hand {
/**
* The thin hand is created from a simple line, so its easy and fast
* to draw.
*/
constructor(centerX,
centerY,
length,
@ -18,23 +37,37 @@ class Hand {
this.red = red;
this.green = green;
this.blue = blue;
// The last x and y coordinates (not the centre) of the last draw
this.last_x = centerX;
this.last_y = centerY;
// tolerance is the angle tolerance (from the last draw)
// in radians for a redraw to be called.
this.tolerance = tolerance;
// draw test is a predicate (angle, time). This is called
// when the hand thinks that it does not have to draw (from its internal tests)
// to see if it has to draw because of another object.
this.draw_test = draw_test;
// The current angle of the hand. Set to -1 initially
this.angle = -1;
this.last_draw_time = null;
}
// method to move the hand to a new angle
moveTo(angle){
if(Math.abs(angle - this.angle) > this.tolerance || this.draw_test(this.angle,this.last_draw_time) ){
// first test to see of the angle called is beyond the tolerance
// for a redraw
if(Math.abs(angle - this.angle) > this.tolerance ||
// and then call the predicate to see if a redraw is needed
this.draw_test(this.angle,this.last_draw_time) ){
// rub out the old hand line
g.setColor(0,0,0);
g.drawLine(this.centerX, this.centerY, this.last_x, this.last_y);
// Now draw the new hand line
g.setColor(this.red,this.green,this.blue);
x2 = this.centerX + this.length*Math.cos(angle);
y2 = this.centerY + this.length*Math.sin(angle);
g.setColor(this.red,this.green,this.blue);
g.drawLine(this.centerX, this.centerY, x2, y2);
// and store the last draw details for the next call
this.last_x = x2;
this.last_y = y2;
this.angle = angle;
@ -46,7 +79,11 @@ class Hand {
}
}
class ThickHand {
class ThickHand extends Hand {
/**
* The thick hand is created from a filled polygone, so its slower to
* draw so to be used sparingly with few redraws
*/
constructor(centerX,
centerY,
length,
@ -130,28 +167,31 @@ class ThickHand {
}
}
}
// The force draw is set to true to force all objects to redraw themselves
let force_redraw = false;
let seconds_hand = new Hand(screen_center_x,
// The seconds hand is the main focus and is set to redraw on every cycle
let seconds_hand = new ThinHand(screen_center_x,
screen_center_y,
100,
0,
(angle, last_draw_time) => false,
1.0,0.0,0.0);
// The minute hand is set to redraw at a 250th of a circle,
// when the second hand is ontop or slighly overtaking
// or when a force_redraw is called
let minutes_hand_redraw = function(angle, last_draw_time){
return force_redraw || (seconds_hand.angle > angle &&
Math.abs(seconds_hand.angle - angle) <2*Math.PI/25 &&
new Date().getTime() - last_draw_time.getTime() > 500);
};
let minutes_hand = new Hand(screen_center_x,
let minutes_hand = new ThinHand(screen_center_x,
screen_center_y,
80,
2*Math.PI/250,
minutes_hand_redraw,
1.0,1.0,1.0);
// The hour hand is a thick hand so we have to redraw when the minute hand
// overlaps from its behind andle coverage to its ahead angle coverage.
let hour_hand_redraw = function(angle_from, angle_to, last_draw_time){
return force_redraw || (seconds_hand.angle >= angle_from &&
seconds_hand.angle <= angle_to &&
@ -174,15 +214,16 @@ function draw_clock(){
draw_hours(date);
force_redraw = false;
}
// drawing the second the millisecond as we need the fine gradation
// for the sweep second hand.
function draw_seconds(date){
seconds = date.getSeconds() + date.getMilliseconds()/1000;
seconds_frac = seconds / 60;
seconds_angle = 2*Math.PI*seconds_frac - (Math.PI/2.0);
seconds_hand.moveTo(seconds_angle);
}
// drawing the minute includes the second and millisec to make the
// movement as continuous as possible.
function draw_mins(date,seconds_angle){
mins = date.getMinutes() + date.getSeconds()/60 + date.getMilliseconds()/(60*1000);
mins_frac = mins / 60;
@ -199,17 +240,159 @@ function draw_hours(date){
hours_angle = 2*Math.PI*hours_frac - (Math.PI/2.0);
redraw = hours_hand.moveTo(hours_angle);
if(redraw){
//console.log(date.getSeconds() + " redraw hours");
console.log(date.getSeconds() + " redraw hours");
}
}
let curr_hour_x = -1;
let curr_hour_y = -1;
let curr_hour_str = null;
const font_width = 40;
const font_height = 58;
/**
* We want to be able to change the font so we set up
* pure virtual for all fonts implementtions to use
*/
class NumeralFont {
/**
* The screen dimensions of what we are going to
* display for the given hour.
*/
getDimensions(hour){return [0,0];}
/**
* The characters that are going to be returned for
* the hour.
*/
hour_txt(hour){ return ""; }
/**
* method to draw text at the required coordinates
*/
draw(hour_txt,x,y){ return "";}
}
class CopasetFont extends NumeralFont{
constructor(){
this.dimension_map = {
1 : [20,58],
2 : [30,58],
3 : [30,58],
4 : [30,58],
5 : [30,58],
6 : [40,58],
7 : [30,58],
8 : [40,58],
9 : [40,58],
10: [50,40],
11: [40,58],
12: [40,58]
};
}
getDimensions(hour){return this.dimension_map[hour];}
hour_txt(hour){ return hour.toString(); }
draw(hour_txt,x,y){
/* dim = [20,58];
g.setColor(0.5,0,0);
g.fillPoly([x,y,
x+dim[0],y,
x+dim[0],y+dim[1],
x,y+dim[1]
]);
g.setColor(1.0,1.0,1.0);*/
g.setFontCopasetic40x58Numeric();
g.drawString(hour_txt,x,y);
}
}
class RomanNumeralFont extends NumeralFont{
constructor(){
this.txt_map = {
1 : 'I',
2 : 'II',
3 : 'III',
4 : 'IV',
5 : 'V',
6 : 'VI',
7 : 'VII',
8 : 'VIII',
9 : 'IX',
10: 'X',
11: 'XI',
12: 'XII'
};
this.dimension_map = {
1 : [10,40],
2 : [25,40],
3 : [40,40],
4 : [40,40],
5 : [30,40],
6 : [40,40],
7 : [60,40],
8 : [70,40],
9 : [40,40],
10: [20,40],
11: [40,40],
12: [60,40]
};
}
getDimensions(hour){ return this.dimension_map[hour];}
hour_txt(hour){ return this.txt_map[hour]; }
draw(hour_txt,x,y){
g.setFont("Vector",40);
g.drawString(hour_txt,x,y);
}
}
class HourScriber {
constructor(numeral_font){
this.numeral_font = numeral_font;
this.curr_numeral_font = numeral_font;
this.curr_hour_x = -1;
this.curr_hour_y = -1;
this.curr_hour_str = null;
this.radius = 70;
}
setNumeralFont(numeral_font){
this.numeral_font = numeral_font;
}
drawHour(hours){
hours_frac = hours / 12;
angle = 2*Math.PI*hours_frac;
dimensions = this.numeral_font.getDimensions(hours);
// we set the radial coord to be in the middle
// of the drawn text.
x = screen_center_x + this.radius*Math.sin(angle) - dimensions[0]/2;
y = screen_center_y - this.radius*Math.cos(angle) - dimensions[1]/2;
txt = this.numeral_font.hour_txt(hours);
if(this.curr_hour_str != null && this.curr_hour_str != txt){
g.setColor(0,0,0);
this.curr_numeral_font.draw(this.curr_hour_str,
this.curr_hour_x,
this.curr_hour_y);
console.log("erasing old hour");
}
g.setColor(1,1,1);
this.numeral_font.draw(txt,x,y);
this.curr_numeral_font = this.numeral_font;
this.curr_hour_x = x;
this.curr_hour_y = y;
this.curr_hour_str = txt;
}
}
let numeral_fonts = [new CopasetFont(), new RomanNumeralFont()];
let numeral_fonts_index = 0;
let hour_scriber = new HourScriber(numeral_fonts[numeral_fonts_index]);
function next_font(){
numeral_fonts_index = numeral_fonts_index + 1;
if(numeral_fonts_index >= numeral_fonts.length){
numeral_fonts_index = 0;
}
hour_scriber.setNumeralFont(
numeral_fonts[numeral_fonts_index]);
force_redraw = true;
}
function draw_hour_digit(date){
hours = date.getHours() % 12;
//hours = date.getMinutes() % 12;
mins = date.getMinutes();
if(mins > 30){
hours = (hours +1) % 12;
@ -217,25 +400,12 @@ function draw_hour_digit(date){
if(hours == 0){
hours = 12;
}
hours_frac = hours / 12;
angle = 2*Math.PI*hours_frac - (Math.PI/2.0);
x = screen_center_x + 70*Math.cos(angle) - font_width/2;
y = screen_center_y + 70*Math.sin(angle) - font_height/2;
g.setFontCopasetic40x58Numeric();
txt = hours.toString();
if(curr_hour_str != null && curr_hour_str != txt){
g.setColor(0,0,0);
g.drawString(curr_hour_str,curr_hour_x,curr_hour_y);
console.log("erasing old hour");
}
g.setColor(1,1,1);
g.drawString(txt,x,y);
curr_hour_x = x;
curr_hour_y = y;
curr_hour_str = txt;
//hours = 1;
hour_scriber.drawHour(hours);
}
// The interval reference for updating the clock
// Boiler plate code for setting up the clock
// below
let intervalRef = null;
function clearTimers(){
@ -250,6 +420,9 @@ function startTimers(){
draw_clock();
}
// The clock redraw is set to 100ms. This is the smallest number
// that give the (my) human eye the illusion of a continious sweep
// second hand.
function scheduleDrawClock(){
if(intervalRef) clearTimers();
intervalRef = setInterval(draw_clock, 100);
@ -292,7 +465,7 @@ startTimers();
setWatch(Bangle.showLauncher, BTN2,{repeat:false,edge:"falling"});
function button1pressed(){
console.log("button 1 pressed");
next_font();
}
// Handle button 1 being pressed