561 lines
19 KiB
JavaScript
561 lines
19 KiB
JavaScript
|
/**
|
||
|
|
* pixi.js scrollbox: a masked content box that can scroll vertically or horizontally with scrollbars
|
||
|
|
*/
|
||
|
|
export default class Scrollbox extends PIXI.Container {
|
||
|
|
/**
|
||
|
|
* create a scrollbox
|
||
|
|
* @param {object} options
|
||
|
|
* @param {boolean} [options.dragScroll=true] user may drag the content area to scroll content
|
||
|
|
* @param {string} [options.overflowX=auto] (none, scroll, hidden, auto) this changes whether the scrollbar is shown
|
||
|
|
* @param {string} [options.overflowY=auto] (none, scroll, hidden, auto) this changes whether the scrollbar is shown
|
||
|
|
* @param {string} [options.overflow] (none, scroll, hidden, auto) sets overflowX and overflowY to this value
|
||
|
|
* @param {number} [options.boxWidth=100] width of scrollbox including scrollbar (in pixels)
|
||
|
|
* @param {number} [options.boxHeight=100] height of scrollbox including scrollbar (in pixels)
|
||
|
|
* @param {number} [options.scrollbarSize=10] size of scrollbar (in pixels)
|
||
|
|
* @param {number} [options.scrollbarOffsetHorizontal=0] offset of horizontal scrollbar (in pixels)
|
||
|
|
* @param {number} [options.scrollbarOffsetVertical=0] offset of vertical scrollbar (in pixels)
|
||
|
|
* @param {boolean} [options.stopPropagation=true] call stopPropagation on any events that impact scrollbox
|
||
|
|
* @param {number} [options.scrollbarBackground=0xdddddd] background color of scrollbar
|
||
|
|
* @param {number} [options.scrollbarBackgroundAlpha=1] alpha of background of scrollbar
|
||
|
|
* @param {number} [options.scrollbarForeground=0x888888] foreground color of scrollbar
|
||
|
|
* @param {number} [options.scrollbarForegroundAlpha=1] alpha of foreground of scrollbar
|
||
|
|
* @param {string} [options.underflow=top-left] what to do when content underflows the scrollbox size: none: do nothing; (left/right/center AND top/bottom/center); OR center (e.g., 'top-left', 'center', 'none', 'bottomright')
|
||
|
|
* @param {(boolean|number)} [options.fade] fade the scrollbar when not in use (true = 1000ms)
|
||
|
|
* @param {number} [options.fadeWait=3000] time to wait before fading the scrollbar if options.fade is set
|
||
|
|
* @param {(string|function)} [options.fadeEase=easeInOutSine] easing function to use for fading
|
||
|
|
*/
|
||
|
|
constructor(options) {
|
||
|
|
super()
|
||
|
|
this.options = Object.assign(
|
||
|
|
{},
|
||
|
|
{
|
||
|
|
boxWidth: 100,
|
||
|
|
boxHeight: 100,
|
||
|
|
scrollbarSize: 10,
|
||
|
|
scrollbarBackground: 14540253,
|
||
|
|
scrollbarBackgroundAlpha: 1,
|
||
|
|
scrollbarForeground: 8947848,
|
||
|
|
scrollbarForegroundAlpha: 1,
|
||
|
|
dragScroll: true,
|
||
|
|
stopPropagation: true,
|
||
|
|
scrollbarOffsetHorizontal: 0,
|
||
|
|
scrollbarOffsetVertical: 0,
|
||
|
|
underflow: 'top-left',
|
||
|
|
fadeScrollbar: false,
|
||
|
|
fadeWait: 3000,
|
||
|
|
fadeEase: 'easeInOutSine'
|
||
|
|
},
|
||
|
|
options
|
||
|
|
)
|
||
|
|
this.ease = new PIXI.extras.Ease.list()
|
||
|
|
|
||
|
|
this.on('added', event => {
|
||
|
|
this.update()
|
||
|
|
})
|
||
|
|
|
||
|
|
/**
|
||
|
|
* content in placed in here
|
||
|
|
* you can use any function from pixi-viewport on content to manually move the content (see https://davidfig.github.io/pixi-viewport/jsdoc/)
|
||
|
|
* @type {PIXI.extras.Viewport}
|
||
|
|
*/
|
||
|
|
this.content = this.addChild(
|
||
|
|
new PIXI.extras.Viewport({
|
||
|
|
passiveWheel: this.options.stopPropagation,
|
||
|
|
stopPropagation: this.options.stopPropagation,
|
||
|
|
screenWidth: this.options.boxWidth,
|
||
|
|
screenHeight: this.options.boxHeight
|
||
|
|
})
|
||
|
|
)
|
||
|
|
this.content.decelerate().on('moved', () => this._drawScrollbars())
|
||
|
|
|
||
|
|
/**
|
||
|
|
* graphics element for drawing the scrollbars
|
||
|
|
* @type {PIXI.Graphics}
|
||
|
|
*/
|
||
|
|
this.scrollbar = this.addChild(new PIXI.Graphics())
|
||
|
|
this.scrollbar.interactive = true
|
||
|
|
this.scrollbar.on('pointerdown', this.scrollbarDown, this)
|
||
|
|
this.interactive = true
|
||
|
|
this.on('pointermove', this.scrollbarMove, this)
|
||
|
|
this.on('pointerup', this.scrollbarUp, this)
|
||
|
|
this.on('pointercancel', this.scrollbarUp, this)
|
||
|
|
this.on('pointerupoutside', this.scrollbarUp, this)
|
||
|
|
this._maskContent = this.addChild(new PIXI.Graphics())
|
||
|
|
this.update()
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* offset of horizontal scrollbar (in pixels)
|
||
|
|
* @type {number}
|
||
|
|
*/
|
||
|
|
get scrollbarOffsetHorizontal() {
|
||
|
|
return this.options.scrollbarOffsetHorizontal
|
||
|
|
}
|
||
|
|
set scrollbarOffsetHorizontal(value) {
|
||
|
|
this.options.scrollbarOffsetHorizontal = value
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* offset of vertical scrollbar (in pixels)
|
||
|
|
* @type {number}
|
||
|
|
*/
|
||
|
|
get scrollbarOffsetVertical() {
|
||
|
|
return this.options.scrollbarOffsetVertical
|
||
|
|
}
|
||
|
|
set scrollbarOffsetVertical(value) {
|
||
|
|
this.options.scrollbarOffsetVertical = value
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* disable the scrollbox (if set to true this will also remove the mask)
|
||
|
|
* @type {boolean}
|
||
|
|
*/
|
||
|
|
get disable() {
|
||
|
|
return this._disabled
|
||
|
|
}
|
||
|
|
set disable(value) {
|
||
|
|
if (this._disabled !== value) {
|
||
|
|
this._disabled = value
|
||
|
|
this.update()
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* call stopPropagation on any events that impact scrollbox
|
||
|
|
* @type {boolean}
|
||
|
|
*/
|
||
|
|
get stopPropagation() {
|
||
|
|
return this.options.stopPropagation
|
||
|
|
}
|
||
|
|
set stopPropagation(value) {
|
||
|
|
this.options.stopPropagation = value
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* user may drag the content area to scroll content
|
||
|
|
* @type {boolean}
|
||
|
|
*/
|
||
|
|
get dragScroll() {
|
||
|
|
return this.options.dragScroll
|
||
|
|
}
|
||
|
|
set dragScroll(value) {
|
||
|
|
this.options.dragScroll = value
|
||
|
|
if (value) {
|
||
|
|
this.content.drag()
|
||
|
|
} else {
|
||
|
|
this.content.removePlugin('drag')
|
||
|
|
}
|
||
|
|
this.update()
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* width of scrollbox including the scrollbar (if visible)- this changes the size and not the scale of the box
|
||
|
|
* @type {number}
|
||
|
|
*/
|
||
|
|
get boxWidth() {
|
||
|
|
return this.options.boxWidth
|
||
|
|
}
|
||
|
|
set boxWidth(value) {
|
||
|
|
this.options.boxWidth = value
|
||
|
|
this.content.screenWidth = value
|
||
|
|
this.update()
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* sets overflowX and overflowY to (scroll, hidden, auto) changing whether the scrollbar is shown
|
||
|
|
* scroll = always show scrollbar
|
||
|
|
* hidden = hide overflow and do not show scrollbar
|
||
|
|
* auto = if content is larger than box size, then show scrollbar
|
||
|
|
* @type {string}
|
||
|
|
*/
|
||
|
|
get overflow() {
|
||
|
|
return this.options.overflow
|
||
|
|
}
|
||
|
|
set overflow(value) {
|
||
|
|
this.options.overflow = value
|
||
|
|
this.options.overflowX = value
|
||
|
|
this.options.overflowY = value
|
||
|
|
this.update()
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* sets overflowX to (scroll, hidden, auto) changing whether the scrollbar is shown
|
||
|
|
* scroll = always show scrollbar
|
||
|
|
* hidden = hide overflow and do not show scrollbar
|
||
|
|
* auto = if content is larger than box size, then show scrollbar
|
||
|
|
* @type {string}
|
||
|
|
*/
|
||
|
|
get overflowX() {
|
||
|
|
return this.options.overflowX
|
||
|
|
}
|
||
|
|
set overflowX(value) {
|
||
|
|
this.options.overflowX = value
|
||
|
|
this.update()
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* sets overflowY to (scroll, hidden, auto) changing whether the scrollbar is shown
|
||
|
|
* scroll = always show scrollbar
|
||
|
|
* hidden = hide overflow and do not show scrollbar
|
||
|
|
* auto = if content is larger than box size, then show scrollbar
|
||
|
|
* @type {string}
|
||
|
|
*/
|
||
|
|
get overflowY() {
|
||
|
|
return this.options.overflowY
|
||
|
|
}
|
||
|
|
set overflowY(value) {
|
||
|
|
this.options.overflowY = value
|
||
|
|
this.update()
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* height of scrollbox including the scrollbar (if visible) - this changes the size and not the scale of the box
|
||
|
|
* @type {number}
|
||
|
|
*/
|
||
|
|
get boxHeight() {
|
||
|
|
return this.options.boxHeight
|
||
|
|
}
|
||
|
|
set boxHeight(value) {
|
||
|
|
this.options.boxHeight = value
|
||
|
|
this.content.screenHeight = value
|
||
|
|
this.update()
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* scrollbar size in pixels
|
||
|
|
* @type {number}
|
||
|
|
*/
|
||
|
|
get scrollbarSize() {
|
||
|
|
return this.options.scrollbarSize
|
||
|
|
}
|
||
|
|
set scrollbarSize(value) {
|
||
|
|
this.options.scrollbarSize = value
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* width of scrollbox less the scrollbar (if visible)
|
||
|
|
* @type {number}
|
||
|
|
* @readonly
|
||
|
|
*/
|
||
|
|
get contentWidth() {
|
||
|
|
return this.options.boxWidth - (this.isScrollbarVertical ? this.options.scrollbarSize : 0)
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* height of scrollbox less the scrollbar (if visible)
|
||
|
|
* @type {number}
|
||
|
|
* @readonly
|
||
|
|
*/
|
||
|
|
get contentHeight() {
|
||
|
|
return this.options.boxHeight - (this.isScrollbarHorizontal ? this.options.scrollbarSize : 0)
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* is the vertical scrollbar visible
|
||
|
|
* @type {boolean}
|
||
|
|
* @readonly
|
||
|
|
*/
|
||
|
|
get isScrollbarVertical() {
|
||
|
|
return this._isScrollbarVertical
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* is the horizontal scrollbar visible
|
||
|
|
* @type {boolean}
|
||
|
|
* @readonly
|
||
|
|
*/
|
||
|
|
get isScrollbarHorizontal() {
|
||
|
|
return this._isScrollbarHorizontal
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* top coordinate of scrollbar
|
||
|
|
*/
|
||
|
|
get scrollTop() {
|
||
|
|
return this.content.top
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* left coordinate of scrollbar
|
||
|
|
*/
|
||
|
|
get scrollLeft() {
|
||
|
|
return this.content.left
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* width of content area
|
||
|
|
* if not set then it uses content.width to calculate width
|
||
|
|
*/
|
||
|
|
get scrollWidth() {
|
||
|
|
return this._scrollWidth || this.content.width
|
||
|
|
}
|
||
|
|
set scrollWidth(value) {
|
||
|
|
this._scrollWidth = value
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* height of content area
|
||
|
|
* if not set then it uses content.height to calculate height
|
||
|
|
*/
|
||
|
|
get scrollHeight() {
|
||
|
|
return this._scrollHeight || this.content.height
|
||
|
|
}
|
||
|
|
set scrollHeight(value) {
|
||
|
|
this._scrollHeight = value
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* draws scrollbars
|
||
|
|
* @private
|
||
|
|
*/
|
||
|
|
_drawScrollbars() {
|
||
|
|
this._isScrollbarHorizontal =
|
||
|
|
this.overflowX === 'scroll'
|
||
|
|
? true
|
||
|
|
: ['hidden', 'none'].indexOf(this.overflowX) !== -1
|
||
|
|
? false
|
||
|
|
: this.scrollWidth > this.options.boxWidth
|
||
|
|
this._isScrollbarVertical =
|
||
|
|
this.overflowY === 'scroll'
|
||
|
|
? true
|
||
|
|
: ['hidden', 'none'].indexOf(this.overflowY) !== -1
|
||
|
|
? false
|
||
|
|
: this.scrollHeight > this.options.boxHeight
|
||
|
|
this.scrollbar.clear()
|
||
|
|
let options = {}
|
||
|
|
options.left = 0
|
||
|
|
options.right = this.scrollWidth + (this._isScrollbarVertical ? this.options.scrollbarSize : 0)
|
||
|
|
options.top = 0
|
||
|
|
options.bottom = this.scrollHeight + (this.isScrollbarHorizontal ? this.options.scrollbarSize : 0)
|
||
|
|
const width = this.scrollWidth + (this.isScrollbarVertical ? this.options.scrollbarSize : 0)
|
||
|
|
const height = this.scrollHeight + (this.isScrollbarHorizontal ? this.options.scrollbarSize : 0)
|
||
|
|
this.scrollbarTop = (this.content.top / height) * this.boxHeight
|
||
|
|
this.scrollbarTop = this.scrollbarTop < 0 ? 0 : this.scrollbarTop
|
||
|
|
this.scrollbarHeight = (this.boxHeight / height) * this.boxHeight
|
||
|
|
this.scrollbarHeight =
|
||
|
|
this.scrollbarTop + this.scrollbarHeight > this.boxHeight
|
||
|
|
? this.boxHeight - this.scrollbarTop
|
||
|
|
: this.scrollbarHeight
|
||
|
|
this.scrollbarLeft = (this.content.left / width) * this.boxWidth
|
||
|
|
this.scrollbarLeft = this.scrollbarLeft < 0 ? 0 : this.scrollbarLeft
|
||
|
|
this.scrollbarWidth = (this.boxWidth / width) * this.boxWidth
|
||
|
|
this.scrollbarWidth =
|
||
|
|
this.scrollbarWidth + this.scrollbarLeft > this.boxWidth
|
||
|
|
? this.boxWidth - this.scrollbarLeft
|
||
|
|
: this.scrollbarWidth
|
||
|
|
if (this.isScrollbarVertical) {
|
||
|
|
this.scrollbar
|
||
|
|
.beginFill(this.options.scrollbarBackground, this.options.scrollbarBackgroundAlpha)
|
||
|
|
.drawRect(
|
||
|
|
this.boxWidth - this.scrollbarSize + this.options.scrollbarOffsetVertical,
|
||
|
|
0,
|
||
|
|
this.scrollbarSize,
|
||
|
|
this.boxHeight
|
||
|
|
)
|
||
|
|
.endFill()
|
||
|
|
}
|
||
|
|
if (this.isScrollbarHorizontal) {
|
||
|
|
this.scrollbar
|
||
|
|
.beginFill(this.options.scrollbarBackground, this.options.scrollbarBackgroundAlpha)
|
||
|
|
.drawRect(
|
||
|
|
0,
|
||
|
|
this.boxHeight - this.scrollbarSize + this.options.scrollbarOffsetHorizontal,
|
||
|
|
this.boxWidth,
|
||
|
|
this.scrollbarSize
|
||
|
|
)
|
||
|
|
.endFill()
|
||
|
|
}
|
||
|
|
if (this.isScrollbarVertical) {
|
||
|
|
this.scrollbar
|
||
|
|
.beginFill(this.options.scrollbarForeground, this.options.scrollbarForegroundAlpha)
|
||
|
|
.drawRect(
|
||
|
|
this.boxWidth - this.scrollbarSize + this.options.scrollbarOffsetVertical,
|
||
|
|
this.scrollbarTop,
|
||
|
|
this.scrollbarSize,
|
||
|
|
this.scrollbarHeight
|
||
|
|
)
|
||
|
|
.endFill()
|
||
|
|
}
|
||
|
|
if (this.isScrollbarHorizontal) {
|
||
|
|
this.scrollbar
|
||
|
|
.beginFill(this.options.scrollbarForeground, this.options.scrollbarForegroundAlpha)
|
||
|
|
.drawRect(
|
||
|
|
this.scrollbarLeft,
|
||
|
|
this.boxHeight - this.scrollbarSize + this.options.scrollbarOffsetHorizontal,
|
||
|
|
this.scrollbarWidth,
|
||
|
|
this.scrollbarSize
|
||
|
|
)
|
||
|
|
.endFill()
|
||
|
|
}
|
||
|
|
// this.content.forceHitArea = new PIXI.Rectangle(0, 0 , this.boxWidth, this.boxHeight)
|
||
|
|
this.activateFade()
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* draws mask layer
|
||
|
|
* @private
|
||
|
|
*/
|
||
|
|
_drawMask() {
|
||
|
|
this._maskContent
|
||
|
|
.beginFill(0)
|
||
|
|
.drawRect(0, 0, this.boxWidth, this.boxHeight)
|
||
|
|
.endFill()
|
||
|
|
this.content.mask = this._maskContent
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* call when scrollbox content changes
|
||
|
|
*/
|
||
|
|
update() {
|
||
|
|
this.content.mask = null
|
||
|
|
this._maskContent.clear()
|
||
|
|
if (!this._disabled) {
|
||
|
|
this._drawScrollbars()
|
||
|
|
this._drawMask()
|
||
|
|
if (this.options.dragScroll) {
|
||
|
|
const direction =
|
||
|
|
this.isScrollbarHorizontal && this.isScrollbarVertical
|
||
|
|
? 'all'
|
||
|
|
: this.isScrollbarHorizontal
|
||
|
|
? 'x'
|
||
|
|
: 'y'
|
||
|
|
if (direction !== null) {
|
||
|
|
this.content
|
||
|
|
.drag({ clampWheel: true, direction })
|
||
|
|
.clamp({ direction, underflow: this.options.underflow })
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* show the scrollbar and restart the timer for fade if options.fade is set
|
||
|
|
*/
|
||
|
|
activateFade() {
|
||
|
|
if (this.options.fade) {
|
||
|
|
if (this.fade) {
|
||
|
|
this.ease.remove(this.fade)
|
||
|
|
}
|
||
|
|
this.scrollbar.alpha = 1
|
||
|
|
const time = this.options.fade === true ? 1000 : this.options.fade
|
||
|
|
this.fade = this.ease.to(this.scrollbar, { alpha: 0 }, time, {
|
||
|
|
wait: this.options.fadeWait,
|
||
|
|
ease: this.options.fadeEase
|
||
|
|
})
|
||
|
|
this.fade.on('each', () => (this.content.dirty = true))
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* handle pointer down on scrollbar
|
||
|
|
* @param {PIXI.interaction.InteractionEvent} e
|
||
|
|
* @private
|
||
|
|
*/
|
||
|
|
scrollbarDown(e) {
|
||
|
|
const local = this.toLocal(e.data.global)
|
||
|
|
if (this.isScrollbarHorizontal) {
|
||
|
|
if (local.y > this.boxHeight - this.scrollbarSize) {
|
||
|
|
if (local.x >= this.scrollbarLeft && local.x <= this.scrollbarLeft + this.scrollbarWidth) {
|
||
|
|
this.pointerDown = { type: 'horizontal', last: local }
|
||
|
|
} else {
|
||
|
|
if (local.x > this.scrollbarLeft) {
|
||
|
|
this.content.left += this.content.worldScreenWidth
|
||
|
|
this.update()
|
||
|
|
} else {
|
||
|
|
this.content.left -= this.content.worldScreenWidth
|
||
|
|
this.update()
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (this.options.stopPropagation) {
|
||
|
|
e.stopPropagation()
|
||
|
|
}
|
||
|
|
return
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (this.isScrollbarVertical) {
|
||
|
|
if (local.x > this.boxWidth - this.scrollbarSize) {
|
||
|
|
if (local.y >= this.scrollbarTop && local.y <= this.scrollbarTop + this.scrollbarWidth) {
|
||
|
|
this.pointerDown = { type: 'vertical', last: local }
|
||
|
|
} else {
|
||
|
|
if (local.y > this.scrollbarTop) {
|
||
|
|
this.content.top += this.content.worldScreenHeight
|
||
|
|
this.update()
|
||
|
|
} else {
|
||
|
|
this.content.top -= this.content.worldScreenHeight
|
||
|
|
this.update()
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (this.options.stopPropagation) {
|
||
|
|
e.stopPropagation()
|
||
|
|
}
|
||
|
|
return
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* handle pointer move on scrollbar
|
||
|
|
* @param {PIXI.interaction.InteractionEvent} e
|
||
|
|
* @private
|
||
|
|
*/
|
||
|
|
scrollbarMove(e) {
|
||
|
|
if (this.pointerDown) {
|
||
|
|
if (this.pointerDown.type === 'horizontal') {
|
||
|
|
const local = this.toLocal(e.data.global)
|
||
|
|
this.content.left += local.x - this.pointerDown.last.x
|
||
|
|
this.pointerDown.last = local
|
||
|
|
this.update()
|
||
|
|
} else if (this.pointerDown.type === 'vertical') {
|
||
|
|
const local = this.toLocal(e.data.global)
|
||
|
|
this.content.top += local.y - this.pointerDown.last.y
|
||
|
|
this.pointerDown.last = local
|
||
|
|
this.update()
|
||
|
|
}
|
||
|
|
if (this.options.stopPropagation) {
|
||
|
|
e.stopPropagation()
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* handle pointer down on scrollbar
|
||
|
|
* @private
|
||
|
|
*/
|
||
|
|
scrollbarUp() {
|
||
|
|
this.pointerDown = null
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* resize the mask for the container
|
||
|
|
* @param {object} options
|
||
|
|
* @param {number} [options.boxWidth] width of scrollbox including scrollbar (in pixels)
|
||
|
|
* @param {number} [options.boxHeight] height of scrollbox including scrollbar (in pixels)
|
||
|
|
* @param {number} [options.scrollWidth] set the width of the inside of the scrollbox (leave null to use content.width)
|
||
|
|
* @param {number} [options.scrollHeight] set the height of the inside of the scrollbox (leave null to use content.height)
|
||
|
|
*/
|
||
|
|
resize(options) {
|
||
|
|
this.options.boxWidth = typeof options.boxWidth !== 'undefined' ? options.boxWidth : this.options.boxWidth
|
||
|
|
this.options.boxHeight = typeof options.boxHeight !== 'undefined' ? options.boxHeight : this.options.boxHeight
|
||
|
|
if (options.scrollWidth) {
|
||
|
|
this.scrollWidth = options.scrollWidth
|
||
|
|
}
|
||
|
|
if (options.scrollHeight) {
|
||
|
|
this.scrollHeight = options.scrollHeight
|
||
|
|
}
|
||
|
|
this.content.resize(this.options.boxWidth, this.options.boxHeight, this.scrollWidth, this.scrollHeight)
|
||
|
|
this.update()
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* ensure that the bounding box is visible
|
||
|
|
* @param {number} x - relative to content's coordinate system
|
||
|
|
* @param {number} y
|
||
|
|
* @param {number} width
|
||
|
|
* @param {number} height
|
||
|
|
*/
|
||
|
|
ensureVisible(x, y, width, height) {
|
||
|
|
this.content.ensureVisible(x, y, width, height)
|
||
|
|
this._drawScrollbars()
|
||
|
|
}
|
||
|
|
}
|