[start] decouple utils

src/scripts/charts/AxisChart.js

@@ -1,5 +1,5 @@
 import $ from '../helpers/dom';
-import { float_2, arrays_equal } from '../helpers/utils';
+import { float_2, arrays_equal, get_string_width, get_bar_height_and_y_attr } from '../helpers/utils';
 import BaseChart from './BaseChart';
 
 export default class AxisChart extends BaseChart {
@@ -19,6 +19,8 @@ export default class AxisChart extends BaseChart {
 			'yellow', 'light-blue', 'light-green', 'purple', 'magenta'];
 
 		this.zero_line = this.height;
+
+		this.old_values = {};
 	}
 
 	setup_values() {
@@ -113,6 +115,7 @@ export default class AxisChart extends BaseChart {
 
 	// make VERTICAL lines for x values
 	make_x_axis(animate=false) {
+		let char_width = 8;
 		let start_at, height, text_start_at, axis_line_class = '';
 		if(this.x_axis_mode === 'span') {		// long spanning lines
 			start_at = -7;
@@ -137,7 +140,7 @@ export default class AxisChart extends BaseChart {
 
 		this.x_axis_group.textContent = '';
 		this.x.map((point, i) => {
-			let space_taken = this.get_strwidth(point) + 2;
+			let space_taken = get_string_width(point, char_width) + 2;
 			if(space_taken > allowed_space) {
 				if(this.is_series) {
 					// Skip some axis lines if X axis is a series
@@ -986,30 +989,6 @@ export default class AxisChart extends BaseChart {
 		// this.make_tooltip();
 	}
 
-	get_bar_height_and_y_attr(y_top) {
-		let height, y;
-		if (y_top <= this.zero_line) {
-			height = this.zero_line - y_top;
-			y = y_top;
-
-			// In case of invisible bars
-			if(height === 0) {
-				height = this.height * 0.01;
-				y -= height;
-			}
-		} else {
-			height = y_top - this.zero_line;
-			y = this.zero_line;
-
-			// In case of invisible bars
-			if(height === 0) {
-				height = this.height * 0.01;
-			}
-		}
-
-		return [height, y];
-	}
-
 	setup_utils() {
 		this.draw = {
 			'bar': (x, y_top, args, color, index, dataset_index, no_of_datasets) => {
@@ -1019,7 +998,7 @@ export default class AxisChart extends BaseChart {
 				let width = total_width / no_of_datasets;
 				let current_x = start_x + width * dataset_index;
 
-				let [height, y] = this.get_bar_height_and_y_attr(y_top);
+				let [height, y] = get_bar_height_and_y_attr(y_top, this.zero_line, this.height);
 
 				return $.createSVG('rect', {
 					className: `bar mini fill ${color}`,
@@ -1046,7 +1025,7 @@ export default class AxisChart extends BaseChart {
 			'bar': (bar_obj, x, y_top, index) => {
 				let start = x - this.avg_unit_width/4;
 				let width = (this.avg_unit_width/2)/this.y.length;
-				let [height, y] = this.get_bar_height_and_y_attr(y_top);
+				let [height, y] = get_bar_height_and_y_attr(y_top, this.zero_line, this.height);
 
 				x = start + (width * index);
 

src/scripts/charts/BaseChart.js

@@ -1,5 +1,6 @@
 import SvgTip from '../objects/SvgTip';
 import $ from '../helpers/dom';
+import { get_string_width } from '../helpers/utils';
 import Chart from '../charts';
 
 export default class BaseChart {
@@ -122,9 +123,11 @@ export default class BaseChart {
 
 	set_width() {
 		let special_values_width = 0;
+		let char_width = 8;
 		this.specific_values.map(val => {
-			if(this.get_strwidth(val.title) > special_values_width) {
-				special_values_width = this.get_strwidth(val.title) - 40;
+			let str_width = get_string_width((val.title + ""), char_width);
+			if(str_width > special_values_width) {
+				special_values_width = str_width - 40;
 			}
 		});
 		this.base_width = this.parent.offsetWidth - special_values_width;
@@ -256,11 +259,6 @@ export default class BaseChart {
 		$.fire(this.parent, "data-select", this.get_data_point());
 	}
 
-	// Helpers
-	get_strwidth(string) {
-		return (string+"").length * 8;
-	}
-
 	// Objects
 	setup_utils() { }
 }

src/scripts/helpers/colors.js

@@ -0,0 +1,18 @@
+function limit_color(r){
+	if (r > 255) return 255;
+	else if (r < 0) return 0;
+	return r;
+}
+
+export function lighten_darken_color(col, amt) {
+	let usePound = false;
+	if (col[0] == "#") {
+		col = col.slice(1);
+		usePound = true;
+	}
+	let num = parseInt(col,16);
+	let r = limit_color((num >> 16) + amt);
+	let b = limit_color(((num >> 8) & 0x00FF) + amt);
+	let g = limit_color((num & 0x0000FF) + amt);
+	return (usePound?"#":"") + (g | (b << 8) | (r << 16)).toString(16);
+}

src/scripts/helpers/draw.js

@@ -0,0 +1,25 @@
+export function float_2(d) {
+	return parseFloat(d.toFixed(2));
+}
+
+export function make_x_line(height, text_start_at, point, label_class, axis_line_class, x_pos) {
+
+}
+
+export function make_y_line() {}
+
+export function draw_x_line() {}
+
+export function draw_y_line() {}
+
+export function label_x_line() {}
+
+export function label_y_line() {}
+
+export function get_anim_x_line() {}
+
+export function get_anim_y_line() {}
+
+export function draw_rect() {}
+
+export function draw_circle() {}

src/scripts/helpers/utils.js

@@ -1,6 +1,4 @@
-export function float_2(d) {
-	return parseFloat(d.toFixed(2));
-}
+
 
 export function arrays_equal(arr1, arr2) {
 	if(arr1.length !== arr2.length) return false;
@@ -17,7 +15,7 @@ function limitColor(r){
 	return r;
 }
 
-export function lightenDarkenColor(col,amt) {
+export function lightenDarkenColor(col, amt) {
 	let usePound = false;
 	if (col[0] == "#") {
 		col = col.slice(1);
@@ -43,4 +41,66 @@ export function shuffle(array) {
 		let j = Math.floor(Math.random() * (i + 1));
 		[array[i], array[j]] = [array[j], array[i]];
 	}
-}
+
+	return array;
+}
+
+export function get_string_width(string, char_width) {
+	return (string+"").length * char_width;
+}
+
+export function get_bar_height_and_y_attr(y_top, zero_line, total_height) {
+	let height, y;
+	if (y_top <= zero_line) {
+		height = zero_line - y_top;
+		y = y_top;
+
+		// In case of invisible bars
+		if(height === 0) {
+			height = total_height * 0.01;
+			y -= height;
+		}
+	} else {
+		height = y_top - zero_line;
+		y = zero_line;
+
+		// In case of invisible bars
+		if(height === 0) {
+			height = total_height * 0.01;
+		}
+	}
+
+	return [height, y];
+}
+
+export function divide_if_more_than_five(number) {
+	return (number < 5) ? number : number / 2;
+}
+
+export function calc_whole_parts(value, divisor) {
+	return Math.ceil(value / divisor);
+}
+
+export function make_even(number) {
+	return (number % 2 !== 0) ? ++number : number;
+}
+
+export function calc_part_size(value) {
+	// take care of fractions
+	return Math.pow(10, ((value+"").length - 1));
+}
+
+export function calc_upper_bound(value) {
+
+}
+
+export function calc_intervals(start, interval_size, count) {
+	let intervals = [];
+	for(var i = 0; i <= count; i++){
+		intervals.push(start);
+		start += interval_size;
+	}
+	return intervals;
+}
+
+// export function