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Speed up navigation panel scroll handler

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This commit is contained in:
Rouslan Placella 2012-10-18 13:21:22 +01:00
parent 34245294b3
commit 0635c1d135
1 changed files with 12 additions and 3 deletions
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15
js/navigation.js
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@ -350,6 +350,7 @@ function PMA_navigationTreePagination($this)
* @var ScrollHandler Custom object that manages the scrolling of the navigation
*/
var ScrollHandler = {
busy: false,
/**
* Limits the percentage of scrolling within sane values
*
@ -433,6 +434,9 @@ var ScrollHandler = {
this.displayScrollbar();
$(window).bind('resize', this.displayScrollbar);
this.elms.$handle.live('drag', function (event, drag) {
if (ScrollHandler.busy) {
return;
}
var elms = ScrollHandler.elms;
var scrollbarOffset = elms.$scrollbar.offset().top;
var pos = drag.offsetY - scrollbarOffset;
@ -440,6 +444,10 @@ var ScrollHandler = {
value = ScrollHandler.sanitize(pos / height);
ScrollHandler.setScrollbar(value);
ScrollHandler.setContent(value);
ScrollHandler.busy = true;
setTimeout(function () {
ScrollHandler.busy = false;
}, 4);
});
this.elms.$scrollbar.live('click', function (event) {
if($(event.target).attr('id') === $(this).attr('id')) {
@ -560,13 +568,14 @@ var ResizeHandler = function () {
*/
this.getPos = function (event) {
var pos = event.pageX;
var windowWidth = $(window).width();
if (this.left != 'left') {
pos = $(window).width() - event.pageX;
pos = windowWidth - event.pageX;
}
if (pos < 0) {
pos = 0;
} else if (pos + 100 >= $(window).width()) {
pos = $(window).width() - 100;
} else if (pos + 100 >= windowWidth) {
pos = windowWidth - 100;
} else {
this.goto = 0;
}