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<h1 class="page-title">Source: components/PaintBox.js</h1>
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<pre class="prettyprint source linenums"><code>import { jGraduate } from './jgraduate/jQuery.jGraduate.js'
/**
*
*/
class PaintBox {
/**
* @param {string|Element|external:jQuery} container
* @param {"fill"} type
*/
constructor (container, type) {
// set up gradients to be used for the buttons
const svgdocbox = new DOMParser().parseFromString(
`<svg xmlns="http://www.w3.org/2000/svg" width="14" height="14">
<rect
fill="#000000" opacity="1" width="14" height="14"/>
<defs><linearGradient id="gradbox_${PaintBox.ctr++}"/></defs>
</svg>`,
'text/xml'
)
let docElem = svgdocbox.documentElement
docElem = document.importNode(docElem, true)
container.appendChild(docElem)
this.rect = docElem.firstElementChild
this.defs = docElem.getElementsByTagName('defs')[0]
this.grad = this.defs.firstElementChild
// this.paint = new $.jGraduate.Paint({solidColor: color});
this.type = type
}
/**
* @param {module:jGraduate~Paint} paint
* @returns {void}
*/
setPaint (paint) {
this.paint = paint
const ptype = paint.type
const opac = paint.alpha / 100
let fillAttr = 'none'
switch (ptype) {
case 'solidColor':
fillAttr = (paint[ptype] !== 'none') ? '#' + paint[ptype] : paint[ptype]
break
case 'linearGradient':
case 'radialGradient': {
this.grad.remove()
this.grad = paint[ptype]
this.defs.appendChild(this.grad)
const id = this.grad.id = 'gradbox_' + this.type
fillAttr = 'url(#' + id + ')'
break
}
}
this.rect.setAttribute('fill', fillAttr)
this.rect.setAttribute('opacity', opac)
}
/**
* @param {PlainObject} svgCanvas
* @param {string} color
* @param {Float} opac
* @param {string} type
* @returns {module:jGraduate~Paint}
*/
static getPaint (svgCanvas, color, opac, type) {
// update the editor's fill paint
const opts = { alpha: opac }
if (color.startsWith('url(#')) {
let refElem = svgCanvas.getRefElem(color)
refElem = (refElem) ? refElem.cloneNode(true) : document.querySelectorAll('#' + type + '_color defs *')[0]
if (!refElem) {
console.error(`the color ${color} is referenced by an url that can't be identified - using 'none'`)
opts.solidColor = 'none'
} else {
opts[refElem.tagName] = refElem
}
} else if (color.startsWith('#')) {
opts.solidColor = color.substr(1)
}
return new jGraduate.Paint(opts)
}
/**
* @param {PlainObject} svgcanvas
* @param {PlainObject} selectedElement
* @returns {any}
*/
update (svgcanvas, selectedElement) {
if (!selectedElement) { return null }
const { type } = this
switch (selectedElement.tagName) {
case 'use':
case 'image':
case 'foreignObject':
// These elements don't have fill or stroke, so don't change
// the current value
return null
case 'g':
case 'a': {
const childs = selectedElement.getElementsByTagName('*')
let gPaint = null
for (let i = 0, len = childs.length; i < len; i++) {
const elem = childs[i]
const p = elem.getAttribute(type)
if (i === 0) {
gPaint = p
} else if (gPaint !== p) {
gPaint = null
break
}
}
if (gPaint === null) {
// No common color, don't update anything
this._paintColor = null
return null
}
this._paintColor = gPaint
this._paintOpacity = 1
break
} default: {
this._paintOpacity = Number.parseFloat(selectedElement.getAttribute(type + '-opacity'))
if (Number.isNaN(this._paintOpacity)) {
this._paintOpacity = 1.0
}
const defColor = type === 'fill' ? 'black' : 'none'
this._paintColor = selectedElement.getAttribute(type) || defColor
}
}
this._paintOpacity *= 100
const paint = PaintBox.getPaint(svgcanvas, this._paintColor, this._paintOpacity, type)
// update the rect inside #fill_color/#stroke_color
this.setPaint(paint)
return (paint)
}
}
PaintBox.ctr = 0
export default PaintBox
</code></pre>
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