svgedit
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Powerful SVG-Editor for your browser
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JavaScript
/**
* @file ext-overview_window.js
*
* @license MIT
*
* @copyright 2013 James Sacksteder
*
*/
import { dragmove } from './dragmove/dragmove.js'
export default {
name: 'overview_window',
init ({ _$ }) {
const svgEditor = this
const { $id, $click } = svgEditor.svgCanvas
const overviewWindowGlobals = {}
// Define and insert the base html element.
const propsWindowHtml =
'<div id="overview_window_content_pane" style="width:100%; word-wrap:break-word; display:inline-block; margin-top:20px;">' +
'<div id="overview_window_content" style="position:relative; padding-left:15px; top:0px;">' +
'<div style="background-color:#A0A0A0; display:inline-block; overflow:visible;">' +
'<svg id="overviewMiniView" width="132" height="100" x="0" y="0" viewBox="0 0 4800 3600" ' +
'xmlns="http://www.w3.org/2000/svg" ' +
'xmlns:xlink="http://www.w3.org/1999/xlink">' +
'<use x="0" y="0" href="#svgroot"> </use>' +
'</svg>' +
'<div id="overview_window_view_box" style="min-width:50px; min-height:50px; position:absolute; top:30px; left:30px; z-index:5; background-color:rgba(255,0,102,0.3);">' +
'</div>' +
'</div>' +
'</div>' +
'</div>'
$id('sidepanel_content').insertAdjacentHTML('beforeend', propsWindowHtml)
// Define dynamic animation of the view box.
const updateViewBox = () => {
const { workarea } = svgEditor
const portHeight = parseFloat(getComputedStyle(workarea, null).height.replace('px', ''))
const portWidth = parseFloat(getComputedStyle(workarea, null).width.replace('px', ''))
const portX = workarea.scrollLeft
const portY = workarea.scrollTop
const windowWidth = parseFloat(getComputedStyle($id('svgcanvas'), null).width.replace('px', ''))
const windowHeight = parseFloat(getComputedStyle($id('svgcanvas'), null).height.replace('px', ''))
const overviewWidth = parseFloat(getComputedStyle($id('overviewMiniView'), null).width.replace('px', ''))
const overviewHeight = parseFloat(getComputedStyle($id('overviewMiniView'), null).height.replace('px', ''))
const viewBoxX = portX / windowWidth * overviewWidth
const viewBoxY = portY / windowHeight * overviewHeight
const viewBoxWidth = portWidth / windowWidth * overviewWidth
const viewBoxHeight = portHeight / windowHeight * overviewHeight
$id('overview_window_view_box').style.minWidth = viewBoxWidth + 'px'
$id('overview_window_view_box').style.minHeight = viewBoxHeight + 'px'
$id('overview_window_view_box').style.top = viewBoxY + 'px'
$id('overview_window_view_box').style.left = viewBoxX + 'px'
}
$id('workarea').addEventListener('scroll', () => {
if (!(overviewWindowGlobals.viewBoxDragging)) {
updateViewBox()
}
})
$id('workarea').addEventListener('resize', updateViewBox)
updateViewBox()
// Compensate for changes in zoom and canvas size.
const updateViewDimensions = function () {
const viewWidth = parseFloat(getComputedStyle($id('svgroot'), null).width.replace('px', ''))
const viewHeight = parseFloat(getComputedStyle($id('svgroot'), null).height.replace('px', ''))
const viewX = 640
const viewY = 480
const svgWidthOld = parseFloat(getComputedStyle($id('overviewMiniView'), null).width.replace('px', ''))
const svgHeightNew = viewHeight / viewWidth * svgWidthOld
$id('overviewMiniView').setAttribute('viewBox', viewX + ' ' + viewY + ' ' + viewWidth + ' ' + viewHeight)
$id('overviewMiniView').setAttribute('height', svgHeightNew)
updateViewBox()
}
updateViewDimensions()
// Set up the overview window as a controller for the view port.
overviewWindowGlobals.viewBoxDragging = false
const updateViewPortFromViewBox = function () {
const windowWidth = parseFloat(getComputedStyle($id('svgcanvas'), null).width.replace('px', ''))
const windowHeight = parseFloat(getComputedStyle($id('svgcanvas'), null).height.replace('px', ''))
const overviewWidth = parseFloat(getComputedStyle($id('overviewMiniView'), null).width.replace('px', ''))
const overviewHeight = parseFloat(getComputedStyle($id('overviewMiniView'), null).height.replace('px', ''))
const viewBoxX = parseFloat(getComputedStyle($id('overview_window_view_box'), null).getPropertyValue('left').replace('px', ''))
const viewBoxY = parseFloat(getComputedStyle($id('overview_window_view_box'), null).getPropertyValue('top').replace('px', ''))
const portX = viewBoxX / overviewWidth * windowWidth
const portY = viewBoxY / overviewHeight * windowHeight
$id('workarea').scrollLeft = portX
$id('workarea').scrollTop = portY
}
const onStart = () => {
overviewWindowGlobals.viewBoxDragging = true
updateViewPortFromViewBox()
}
const onEnd = (el, parent, _x, _y) => {
if ((el.offsetLeft + el.offsetWidth) > parseFloat(getComputedStyle(parent, null).width.replace('px', ''))) {
el.style.left = (parseFloat(getComputedStyle(parent, null).width.replace('px', '')) - el.offsetWidth) + 'px'
} else if (el.offsetLeft < 0) {
el.style.left = '0px'
}
if ((el.offsetTop + el.offsetHeight) > parseFloat(getComputedStyle(parent, null).height.replace('px', ''))) {
el.style.top = (parseFloat(getComputedStyle(parent, null).height.replace('px', '')) - el.offsetHeight) + 'px'
} else if (el.offsetTop < 0) {
el.style.top = '0px'
}
overviewWindowGlobals.viewBoxDragging = false
updateViewPortFromViewBox()
}
const onDrag = function () {
updateViewPortFromViewBox()
}
const dragElem = document.querySelector('#overview_window_view_box')
const parentElem = document.querySelector('#overviewMiniView')
dragmove(dragElem, dragElem, parentElem, onStart, onEnd, onDrag)
$click($id('overviewMiniView'), (evt) => {
// Firefox doesn't support evt.offsetX and evt.offsetY.
const mouseX = (evt.offsetX || evt.originalEvent.layerX)
const mouseY = (evt.offsetY || evt.originalEvent.layerY)
const overviewWidth = parseFloat(getComputedStyle($id('overviewMiniView'), null).width.replace('px', ''))
const overviewHeight = parseFloat(getComputedStyle($id('overviewMiniView'), null).height.replace('px', ''))
const viewBoxWidth = parseFloat(getComputedStyle($id('overview_window_view_box'), null).getPropertyValue('min-width').replace('px', ''))
const viewBoxHeight = parseFloat(getComputedStyle($id('overview_window_view_box'), null).getPropertyValue('min-height').replace('px', ''))
let viewBoxX = mouseX - 0.5 * viewBoxWidth
let viewBoxY = mouseY - 0.5 * viewBoxHeight
// deal with constraints
if (viewBoxX < 0) {
viewBoxX = 0
}
if (viewBoxY < 0) {
viewBoxY = 0
}
if (viewBoxX + viewBoxWidth > overviewWidth) {
viewBoxX = overviewWidth - viewBoxWidth
}
if (viewBoxY + viewBoxHeight > overviewHeight) {
viewBoxY = overviewHeight - viewBoxHeight
}
$id('overview_window_view_box').style.top = viewBoxY + 'px'
$id('overview_window_view_box').style.left = viewBoxX + 'px'
updateViewPortFromViewBox()
})
return {
name: 'overview window',
canvasUpdated: updateViewDimensions,
workareaResized: updateViewBox
}
}
}