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tweaking...

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Signed-off-by: Alex A. Naanou <alex.nanou@gmail.com>
This commit is contained in:
Alex A. Naanou 2019-06-17 00:33:44 +03:00
parent 7f48f8460d
commit 584f47c0c7
1 changed files with 49 additions and 8 deletions
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57
ui (gen4)/lib/widget/browse2.js
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@ -2949,11 +2949,6 @@ var BrowserClassPrototype = {
__proto__: BaseBrowser,
}
// XXX TODO:
// - need a way to update some stuff on .update() / .make() -- a way
// to selectively merge the old state with the new...
// - event handler signature -- pass the item + optionally render...
// - keyboard handling...
// XXX render of nested lists does not affect the parent list(s)...
// ...need to render lists and items both as a whole or independently...
// XXX need a strategy to update the DOM -- i.e. add/remove nodes for
@ -2972,6 +2967,11 @@ var BrowserPrototype = {
// XXX 'smooth' value yields odd results...
//scrollBehavior: 'auto',
// XXX can we make this relative???
// XXX use this for page up/down...
// XXX needs more tweaking...
//edgeOffsetWhileScrolling: 50,
hideListHeader: false,
renderHidden: false,
@ -3681,17 +3681,58 @@ var BrowserPrototype = {
// Navigation...
//
// hold key repeat on first/last elements...
// hold key repeat on first/last elements + reveal disabled items at
// start/end of list...
next: function(){
object.parent(BrowserPrototype.next, this).call(this, ...arguments)
var focused = this.focused
var first = this.get('first', {skipDisabled: true})
var last = this.get('last', {skipDisabled: true})
var threashold = this.options.edgeOffsetWhileScrolling || 0
// keep scrolled item at threashold from list edge...
if(threashold > 0){
var elem = getElem(focused)
var lst = this.dom.querySelector('.list')
var h = elem.offsetHeight
var H = lst.offsetHeight
var offset = H - (elem.offsetTop - lst.scrollTop + h)
offset < threashold
&& lst.scrollBy(0, threashold - offset)
// center the first/last elements to reveal hidden items before/after...
} else if(focused === last || focused === first){
this.scrollTo(this.focused, 'center')
}
// hold repeat at last element...
this.focused === this.get('last')
focused === last
&& this.keyboard.pauseRepeat
&& this.keyboard.pauseRepeat() },
prev: function(){
object.parent(BrowserPrototype.prev, this).call(this, ...arguments)
var focused = this.focused
var first = this.get('first', {skipDisabled: true})
var last = this.get('last', {skipDisabled: true})
var threashold = this.options.edgeOffsetWhileScrolling || 0
// keep scrolled item at threashold from list edge...
if(threashold > 0){
var elem = getElem(focused)
var lst = this.dom.querySelector('.list')
var offset = elem.offsetTop - lst.scrollTop
offset < threashold
&& lst.scrollBy(0, offset - threashold)
// center the first/last elements to reveal hidden items before/after...
} else if(focused === last || focused === first){
this.scrollTo(this.focused, 'center')
}
// hold repeat at first element...
this.focused === this.get('first')
focused === first
&& this.keyboard.pauseRepeat
&& this.keyboard.pauseRepeat() },