72 lines
1.7 KiB
JavaScript
72 lines
1.7 KiB
JavaScript
function Surface (ronin) {
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this.el = document.createElement('canvas')
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this.el.id = 'surface'
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this.ratio = window.devicePixelRatio
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this.context = this.el.getContext('2d')
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this.guides = []
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this.install = function (host) {
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host.appendChild(this.el)
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window.addEventListener('resize', (e) => { this.onResize() }, false)
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}
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this.start = function () {
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this.maximize()
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console.log('Surface', `Ratio:${this.ratio}`)
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}
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this.update = function () {
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for (const id in this.guides) {
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this.drawRect(this.guides[id])
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}
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}
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this.drawRect = function (u) {
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console.log(u)
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u.x = !u.x ? 0 : u.x
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u.y = !u.y ? 0 : u.y
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var offset = { x: u.x * 2, y: u.y * 2 }
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var rect = { w: u.w * 2, h: u.h * 2 }
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// Outline
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this.context.beginPath()
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this.context.moveTo(offset.x, offset.y)
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this.context.lineTo(offset.x + rect.w, offset.y)
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this.context.lineTo(offset.x + rect.w, offset.y + rect.h)
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this.context.lineTo(offset.x, offset.y + rect.h)
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this.context.lineTo(offset.x, offset.y)
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this.context.lineCap = 'round'
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this.context.lineWidth = 2
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this.context.strokeStyle = '#f00'
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this.context.stroke()
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this.context.closePath()
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}
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this.addGuide = function (rect) {
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this.guides.push(rect)
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this.update()
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}
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this.resize = function (size) {
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this.el.width = size.w
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this.el.height = size.h
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this.el.style.width = size.w + 'px'
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this.el.style.height = size.h + 'px'
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}
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this.maximize = function () {
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this.resize(this.getRect())
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}
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this.onResize = function () {
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this.maximize()
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}
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this.getRect = function () {
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return { x: 0, y: 0, w: Math.floor(window.innerWidth / 2) - 15, h: Math.floor(window.innerHeight) - 30 }
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}
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}
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