javascript - 'spinner' does not appear right after call it -


i using js show 'spinner' waiting state when loading data. call showwaiting() show 'spinner' , hidewaiting() hide 'spinner' when data loading completed. 'spinner' not appear after calling showwaiting() expected, appears after data finished loading (loaddata1()). please me. thanks

below source code:

js source code:

this.showwaiting(); this.loaddata1(); this.hidewaiting(); this.function1();  showwaiting: function () {           $("#progressbar").css("display", "block");           $("#waiting_popup").show();           $("#progressbar").progressbar({               value: false           });       }

html of spinner:

<div id="waiting_popup" style="z-index: 999999; position: relative;">         <div class="ui-widget-overlay ui-front"></div>         <div id="progressbar" style="width: 300px; margin: 18% auto; display:none;">             <div style="float: left;margin-left: 35%; margin-top: 5px;font-weight: bold;text-shadow: 1px 1px 0 #fff;">loading...</div>         </div>      </div>

javascript strictly single threaded, there nothing happening in browser user interface long code running. have end function after showing spinner, , use timeout start loading after browser has had chance update interface:

this.showwaiting(); var th = this; window.settimeout(function(){   th.loaddata1();   th.hidewaiting();   th.function1(); }, 0);

you should check if can make loading asynchronous. if spinner animated gif, won't move either long code running.


Comments

Post a Comment

Popular posts from this blog

linux - xterm copying to CLIPBOARD using copy-selection causes automatic updating of CLIPBOARD upon mouse selection -

i've tried various ways coerce xterm (versions 285 , 292) copy selection clipboard clipboard whenever press ctrl-shift-c. promising way far has been, in ~/.xresources, put this: xterm*vt100.translations: #override \ ctrl shift <keypress> c: copy-selection(clipboard) \n\ ctrl shift <keypress> v: insert-selection(clipboard) ctrl-shift-v works perfectly, copying has nuance... if restart xterm, highlighting text puts things in primary clipboard; expected, proper, default behavior. if hit ctrl-shift-c, copies current selection clipboard clipboard. the bug, however, if highlight text after first time pressed ctrl-shift-c, you'll see highlighting copies both primary and clipboard. cannot figure out how stop xterm updating clipboard upon selection... , doesn't make sense me in first place. i said, @ specific point in time, copy selection clipboard... yet starts updating automatically upon selection after doing once... anyone have workaround...
Read more

c++ - qgraphicsview horizontal scrolling always has a vertical delta -

Image
i've subclassed qgraphicsview custom canvas used in cad application. i've reimplemented qgraphicsview::wheelevent check keyboard modifiers control key and, if control key pressed, zoom. i'm trying implement horizontal scroll when user holds shift , uses wheel. the problem i'm having horizontal scrolling always scrolls 0.279. not huge problem, hugely annoying , points else being wrong. so, here questions: is right way implement horizontal scrolling? if not, is? how eliminate delta of 0.279? thanks in advance. code , sample output below void myview::zoom(int delta) { double factor = pow(1.2, delta/abs(delta)); this->scale(factor, factor); } void myview::scrollhorizontal(int level) { qpointf center = maptoscene(viewport()->rect().center()); qdebug() << "center: " << center.x() << ", " << center.y(); centeron(qpointf(center.x() - level, center.y())); } void myview::wheelevent(qwheeleve...
Read more