dreemgl/classes/widgets/timeline/labels.js

DreemGL is an open-source multi-screen prototyping framework for mediated environments, with a visual editor and shader styling for webGL and DALi runtimes written in JavaScript. As a toolkit for gpu-accelerated multiscreen development, DreemGL includes

/* DreemGL is a collaboration between Teeming Society & Samsung Electronics, sponsored by Samsung and others.
   Copyright 2015-2016 Teeming Society. Licensed under the Apache License, Version 2.0 (the "License"); You may not use this file except in compliance with the License.
   You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing,
   software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and limitations under the License.*/

define.class('$ui/label', function (require) {

	this.position = 'absolute'
	this.bgcolor = NaN
	this.fgcolor = 'white'
	this.drawtarget = 'color'
	this.bold = true

	var ubuntufont = require('$resources/fonts/ubuntu_medium_256_baked.glf')
	this.font = ubuntufont

	this.attributes = {
		zoom: wire('this.parent.zoom'),
		scroll: wire('this.parent.scroll')
	}

	var MONTHS = ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December']
	var DAYS = ['1st', '2nd', '3rd', '4th', '5th', '6th', '7th', '8th', '9th', '10th', '11th', '12th', '13th', '14th', '15th', '16th',
		'17th', '18th', '19th', '20th', '21st', '22nd', '23rd', '24th', '25th', '26th', '27th', '28th', '29th', '30th', '31st']
	var MONTH_COLLAPSE = 200.0

	this.typeface = function(){
		this.update = function(){
			var view = this.view
			var zoom = view.zoom
			// hack to trigger update on scroll change
			var scroll = view.scroll
			var w = view.parent._layout.width
			var h = view.parent._layout.height

			var mw = w / 11.774193548387096 * 365 / zoom
			var dw = w / zoom
			var hw = w / 24 / zoom

			var ts = view.parent.TIME_SCALE

			var mesh = this.newText()
			if (view.font) mesh.font = view.font
			if (view.align) mesh.align = view.align
			if (view.fontsize) mesh.fontsize = view.fontsize
			mesh.clear()

			var i, x, y, start, offset, date, text

			start = new Date(view.parent.getStart())
			first = new Date(view.parent.getRangeStart())

			var firstYear = first.getFullYear()
			var firstMonth = first.getMonth()
			var firstDate = first.getDate()
			var firstHour = first.getHours()

			function drawLabel(text, date, xoffset, yoffset) {
				x = (date.getTime() - first) / ts / zoom * w + xoffset + 5
				y = yoffset - 5
				mesh.add_x = x
				mesh.add_y = y
				mesh.add(text, 0, 0, 0)
			}

			function drawYears(yoffset) {
				date = new Date("0")
				date.setYear(firstYear)
				xoffset = (date.getTime() - first) / ts / zoom * w
				x = 0, i = -1
				while (x < w) {
					date = new Date(first)
					date.setYear(firstYear + i)
					drawLabel(date.getFullYear().toString(), date, xoffset, yoffset)
					i++
				}
			}

			function drawMonths(yoffset) {
				date = new Date("0")
				date.setYear(firstYear)
				date.setMonth(firstMonth)
				xoffset = (date.getTime() - first) / ts / zoom * w + 1
				x = 0, i = -1
				while (x < w && i < 100) {
					date = new Date(first)
					date.setMonth(firstMonth + i)
					text = MONTHS[date.getMonth() % 12]
					if (mw > 220) {
						text = text + ' ' + date.getFullYear()
					}
					drawLabel(text, date, xoffset, yoffset)
					i++
				}
			}

			function drawDays(yoffset) {
				date = new Date("0")
				date.setYear(firstYear)
				date.setMonth(firstMonth)
				date.setDate(firstDate)
				xoffset = (date.getTime() - first) / ts / zoom * w + 5
				x = 0, i = -1
				while (x < w && i < 100) {
					date = new Date(first)
					date.setDate(firstDate + i)
					text = DAYS[(date.getDate() - 1) % 31]
					if (dw > 220) {
						text = MONTHS[(date.getMonth()) % 12] + ' ' + text + ' ' + date.getFullYear()
					} else if (dw > 120) {
						text = MONTHS[(date.getMonth()) % 12] + ' ' + text
					}
					drawLabel(text, date, xoffset, yoffset)
					i++
				}
			}

			function drawHours(yoffset) {
				date = new Date("0")
				date.setYear(firstYear)
				date.setMonth(firstMonth)
				date.setDate(firstDate)
				date.setHours(firstHour)
				xoffset = (date.getTime() - first) / ts / zoom * w
				var c = 24 / view.parent.hoursegs
				x = 0, i = -1
				while (x < w && i < 100) {
					var h = (firstHour + i) % 24
					date = new Date(first)
					date.setHours(firstHour + i)
					if (view.parent.format == 12) {
						text = (h % 12 || 12) + ' ' + (h < 12 ? 'am' : 'pm')
					} else {
						text = h % 24 + ' h'
					}
					if (h % c == 0) {
						drawLabel(text, date, xoffset, yoffset)
					}
					i++
				}
			}

			mesh.fontsize = view.fontsize * 0.75

			switch (view.parent.segments[0]) {
				case 1:
					drawYears(26)
					break
				case 2:
					drawMonths(26)
					break
				case 4:
					drawDays(26)
					break
			}

			mesh.fontsize = view.fontsize * 0.5

			switch (view.parent.segments[1]) {
				case 2:
					drawMonths(42)
					break
				case 4:
					drawDays(42)
					break
				case 5:
					drawHours(42)
					break
			}

			this.mesh = mesh
		}
	}
})