iwmlib/lib/popupmenu.js

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JavaScript
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2019-03-21 09:57:27 +01:00
import Poppable from './poppable.js'
import Popup from './popup.js'
import { Elements } from './utils.js'
/** A Popup Menu that shows text labels in a vertical row.
*/
export default class PopupMenu extends Popup {
/**
* The constructor.
* @constructor
* @param {DOM Element} parent - The DOM parent element.
* @param {Object} commands - A dict object with command label strings as keys
* and command functions as values.
* @param {string} fontSize - Describes the font size as CSS value
* @param {number || string} padding - Describes the padding as CSS value
* @param {number || string} notchSize - Describes the size of the notch (callout) as CSS value
* @param {string} highlightColor - The color of highlighted menu items as CSS value
* @param {string} backgroundColor - The color of the background as CSS value
* @param {string} normalColor - The color of normal menu items as CSS value
* @param {DOM Element} keepWithin - The container to stay within
* @param {boolean} autoClose - Autoclose the menu after selecting an item
*/
constructor({ parent = null,
commands = null,
fontSize = '1em',
fontFamily = 'Arial',
padding = 16,
zIndex = 1,
spacing = '0px',
switchPos = false,
notchSize = 10,
maxWidth = 800,
backgroundColor = '#EEE',
normalColor = '#444',
highlightColor = 'black',
notchPosition = 'bottomLeft',
keepWithin = null,
autoClose = true } = {}) {
super({ parent, fontSize, fontFamily, padding, notchSize, notchPosition, backgroundColor, keepWithin, normalColor, autoClose })
this.commands = commands
this.zIndex = zIndex
this.switchPos = switchPos
this.spacing = spacing
this.highlightColor = highlightColor
}
/** Setup menu with a dictionary of command labels and command functions.
* @param {Object} commands - A dict object with command label strings as keys
* and command functions as values.
* @return {PopupMenu} this
*/
setup(commands) {
this.commands = commands
this.items = {}
this.element = document.createElement('div')
this.element.style.zIndex = this.zIndex
Elements.addClass(this.element, 'unselectable')
this.notch = document.createElement('div')
Elements.setStyle(this.notch, this.notchStyle())
for (let key in commands) {
let item = document.createElement('div')
this.element.appendChild(item)
item.innerHTML = key
item.style.paddingBottom = item.style.paddingTop = this.spacing
Elements.setStyle(item, { color: this.normalColor, cursor: 'default' })
Elements.addClass(item, 'unselectable')
Elements.addClass(item, 'popupMenuItem')
this.items[key] = item
item.onclick = (event) => { this.perform(key) }
item.ontap = (event) => { this.perform(key) }
item.onmouseover = (event) => { this.over(event, key) }
item.onmouseout = (event) => { this.out(event, key) }
}
this.element.appendChild(this.notch)
this.parent.appendChild(this.element)
this.insertedNode = this.element
Elements.setStyle(this.element, this.defaultStyle())
this.layout()
return this
}
/** Execute a menu command.
* @param {string} key - The selected key.
*/
perform(key) {
let func = this.commands[key]
if (this.autoClose) {
this.close()
}
setTimeout(() => {
func.call()
}, 20)
}
/** Update the menu item denoted by key.
* @param {string} key - The selected key.
* @param {boolean} highlight - Show the item highlighted.
*/
update(key, highlight = false) {
let text = this.items[key]
text.style.color = (highlight) ? this.highlightColor : this.normalColor
}
/** Mouse over handöer.
* @param {Event} event - The mouse event.
* @param {boolean} key - The selected key.
*/
over(event, key) {
for (let k in this.items) {
this.update(k, k == key)
}
}
/** Mouse out handöer.
* @param {Event} event - The mouse event.
* @param {boolean} key - The selected key.
*/
out(event, key) {
this.update(key)
}
/** Shows the PopupMenu with the given commands at the specified point.
* @param {Object} commands - A dict object with command label strings as keys
* and command functions as values.
* @param {Point} point - The position as x, y coordinates {px}.
* @return {PopupMenu} this
*/
showAt(commands, point) {
this.show(commands)
this.placeAt(point)
return this
}
/** Convenient static methods to show and reuse a PopupMenu implemented
* as a class variable.
* @param {Object} commands - A dict object with command label strings as keys
* and command functions as values.
* @param {Point} point - The position as x, y coordinates {px}.
* @param {string} fontSize - Describes the font size as CSS value
* @param {number || string} padding - Describes the padding as CSS value
* @param {number || string} notchSize - Describes the size of the notch (callout) as CSS value
* @param {string} highlightColor - The color of highlighted menu items as CSS value
* @param {string} backgroundColor - The color of the background as CSS value
* @param {string} normalColor - The color of normal menu items as CSS value
* @param {boolean} autoClose - Autoclose the menu after selecting an item
*/
static open(commands, point, { parent = null,
context = window,
fontSize = '1em',
fontFamily = 'Arial',
padding = 16,
zIndex = 1,
spacing = '0px',
switchPos = false,
notchSize = 10,
maxWidth = 800,
keepWithin = null,
backgroundColor = '#EEE',
normalColor = '#444',
autoClose = true } = {}) {
let registered = Poppable.get(context)
if (registered) {
this.closePopup()
return
}
console.log("open", point)
let notchPosition = (point.y < 50 && switchPos) ? 'topCenter' : 'bottomCenter'
let popup = new PopupMenu({
parent, fontSize, padding, zIndex, spacing, switchPos, notchSize,
notchPosition,
maxWidth, backgroundColor, normalColor,
notchPosition, keepWithin, autoClose
})
popup.showAt(commands, point)
popup.register(context)
popup.closeEventListener = (e) => {
if (this.eventOutside(e))
this.closePopup(context)
}
if (autoClose) {
context.addEventListener('mousedown', popup.closeEventListener, true)
context.addEventListener('touchstart', popup.closeEventListener, true)
context.addEventListener('pointerdown', popup.closeEventListener, true)
}
}
static eventOutside(e) {
return !Elements.hasClass(e.target, 'popupMenuItem')
}
/** Convenient static methods to close the PopupMenu implemented
* as a class variable.
*/
static closePopup(context=window) {
let registered = Poppable.get(context)
if (registered) {
registered.close()
context.removeEventListener('mousedown', registered.closeEventListener)
context.removeEventListener('touchstart', registered.closeEventListener)
context.removeEventListener('pointerdown', registered.closeEventListener)
}
}
}