comunic/assets/js/metro/metro-scroll.js

757 lines
27 KiB
JavaScript
Raw Normal View History

2016-11-19 11:08:12 +00:00
(function( $ ) {
$.widget("metro.scrollbar", {
version: "1.0.0",
options: {
height: '100%', /* '100%'|int */
width: '100%', /* '100%'|int */
axis: ['x','y'], /* x|y|[x,y] */
wheel: 55 /* step in px */
//size: 'auto' /* 'auto'|int */
},
startSize: {
width: null,
height: null
},
elemPadding: false,
bothScroll: false,
scrollbar: null,
contentHeight: 0,
contentWidth: 0,
contentMinHeight: 0,
contentMinWidth: 0,
dragElem: null,
dragStart: false,
startCoords: {
x:0,
y:0
},
currCoords: {
x:0,
y:0
},
handlers: false,
_create: function() {
var elem = this.element;
var that = this;
if(elem.data('scroll') != undefined) {
var dataScroll = elem.data('scroll');
if(dataScroll == 'vertical') {
this.options.axis = 'y';
}
if(dataScroll == 'horizontal') {
this.options.axis = 'x';
}
if(dataScroll == 'both') {
this.options.axis = ['x','y'];
}
}
if(elem.data('height') != undefined) {
this.options.height = elem.data('height');
}
if(elem.data('width') != undefined) {
this.options.width = elem.data('width');
}
if(elem.data('wheel') != undefined) {
this.options.wheel = elem.data('wheel');
}
elem.css({
position: 'relative'
});
var width = elem.outerWidth();
var height = elem.outerHeight();
this.contentMinWidth = width;
this.contentMinHeight = height;
this.startSize.width = this.options.width;
this.startSize.height = this.options.height;
var sw = (this.startSize.width == parseInt(this.startSize.width)) ? this.startSize.width+'px' : this.startSize.width;
var sh = (this.startSize.height == parseInt(this.startSize.height)) ? this.startSize.height+'px' : this.startSize.height;
elem.wrap('<div class="scrollbar" style="width: '+sw+'; height: '+sh+';"></div>');
this.scrollbar = elem.parents('.scrollbar').first();
this.scrollbar.parents().first().css({
overflow: 'hidden'
});
this._build(width,height);
$(window).resize(function () {
that._resize();
});
},
_resize: function () {
var elem = this.element;
if( (!isNaN(parseInt(this.element.css('left'))) && parseInt(this.element.css('left')) != 0) || (!isNaN(parseInt(this.element.css('top'))) && parseInt(this.element.css('top'))) ) {
var l = Math.abs(parseInt(this.element.css('left')));
var t = Math.abs(parseInt(this.element.css('top')));
var w = this.scrollbar.width();
var h = this.scrollbar.height();
if(this.contentWidth - l < w) {
l = l - (w-(this.contentWidth - l));
if(l<0) {
l = 0;
}
this.element.css('left',l*(-1));
}
this.element.css('left',l*(-1));
if(this.contentHeight - t < h) {
t = t - (h-(this.contentHeight - t));
if(t<0) {
t = 0;
}
this.element.css('top',t*(-1));
}
}
this.options.width = this.startSize.width;
this.options.height = this.startSize.height;
this.scrollbar.css({
padding: 0
});
if(this.elemPadding) {
this.element.css({
paddingRight: '-=5',
paddingBottom: '-=5'
});
this.elemPadding = false;
}
if(this.scrollbar.find('.scrollbar-v').length>0) {
this.scrollbar.find('.scrollbar-v').remove();
}
if(this.scrollbar.find('.scrollbar-h').length>0) {
this.scrollbar.find('.scrollbar-h').remove();
}
if(this.scrollbar.find('.scrollbar-both').length>0) {
this.scrollbar.find('.scrollbar-both').remove();
}
var width = elem.outerWidth();
var height = elem.outerHeight();
this.contentWidth = width;
this.contentHeight = height;
this._removeHandlers();
this._build(width,height);
},
_build: function (width,height) {
var elem = this.element;
this.options.width = (this.options.width == '100%') ? this.scrollbar.outerWidth() : this.options.width;
this.options.height = (this.options.height == '100%') ? this.scrollbar.outerHeight() : this.options.height;
this.scrollbar.css({
width: this.startSize.width,
height: this.startSize.height
});
this.contentWidth = width;
this.contentHeight = height;
if(this.options.axis == 'y') {
/* vertical */
if(this.contentHeight>this.options.height) {
this.scrollbar.css({
paddingRight: 20,
paddingBottom: 0
});
var width = elem.outerWidth();
var height = elem.outerHeight();
this.contentWidth = width;
this.contentHeight = height;
this._verticalScrollbar();
this._startHandlers();
}
else {
if(this.scrollbar.find('.scrollbar-v').length>0) {
this.scrollbar.find('.scrollbar-v').hide();
}
this.scrollbar.css({
paddingRight: 0,
paddingBottom: 0
});
}
}
else if(this.options.axis == 'x') {
/* horizontal */
if(this.contentWidth>this.options.width) {
if(this.startSize.height == '100%') {
this.scrollbar.css({
paddingBottom: 20,
paddingRight: 0
});
var width = elem.outerWidth();
var height = elem.outerHeight();
this.contentWidth = width;
this.contentHeight = height;
}
this._horizontalScrollbar();
this._startHandlers();
}
else {
if(this.scrollbar.find('.scrollbar-h').length>0) {
this.scrollbar.find('.scrollbar-h').hide();
}
this.scrollbar.css({
paddingBottom: 0,
paddingRight: 0
});
}
}
else {
/* both */
if(this.contentHeight>this.options.height && this.contentWidth>this.options.width) {
this.bothScroll = true;
if(this.scrollbar.find('.scrollbar-both').length>0) {
this.scrollbar.find('.scrollbar-both').show();
}
else {
this.scrollbar.append('<div class="scrollbar-both"></div>');
}
if(!this.elemPadding) {
this.element.css({
paddingRight: '+=5',
paddingBottom: '+=5'
});
this.elemPadding = true;
}
var width = elem.outerWidth();
var height = elem.outerHeight();
this.contentWidth = width;
this.contentHeight = height;
this._verticalScrollbar();
this._horizontalScrollbar();
this._startHandlers();
}
else {
this.bothScroll = false;
if(this.scrollbar.find('.scrollbar-both').length>0) {
this.scrollbar.find('.scrollbar-both').hide();
}
if(this.elemPadding) {
this.element.css({
paddingRight: '-=5',
paddingBottom: '-=5'
});
this.elemPadding = false;
}
if(this.contentWidth>this.options.width) {
if(this.startSize.height == '100%') {
this.scrollbar.css({
paddingBottom: 20,
paddingRight: 0
});
var width = elem.outerWidth();
var height = elem.outerHeight();
this.contentWidth = width;
this.contentHeight = height;
}
this._horizontalScrollbar();
this._startHandlers();
}
else {
if(this.scrollbar.find('.scrollbar-h').length>0) {
this.scrollbar.find('.scrollbar-h').hide();
}
this.scrollbar.css({
paddingBottom: 0,
paddingRight: 0
});
}
if(this.contentHeight>this.options.height) {
this.scrollbar.css({
paddingRight: 20,
paddingBottom: 0
});
var width = elem.outerWidth();
var height = elem.outerHeight();
this.contentWidth = width;
this.contentHeight = height;
this._verticalScrollbar();
this._startHandlers();
}
else {
if(this.scrollbar.find('.scrollbar-v').length>0) {
this.scrollbar.find('.scrollbar-v').hide();
}
this.scrollbar.css({
paddingRight: 0,
paddingBottom: 0
});
}
}
}
},
_verticalScrollbar: function () {
if(this.scrollbar.find('.scrollbar-v').length<1) {
var str = [];
str[str.length] = '<div class="scrollbar-v">';
str[str.length] = '<div class="scrollbar-v-up"></div>';
str[str.length] = '<div class="scrollbar-v-down"></div>';
str[str.length] = '<div class="scrollbar-line-v">';
str[str.length] = '<div class="scrollbar-line-v-btn"></div>';
str[str.length] = '</div>';
str[str.length] = '</div>';
str = str.join('');
this.scrollbar.append(str);
}
else {
this.scrollbar.find('.scrollbar-v').show();
}
var line = this.scrollbar.find('.scrollbar-line-v');
var btn = this.scrollbar.find('.scrollbar-line-v-btn');
var scrollBar = this.scrollbar.find('.scrollbar-v');
if(this.bothScroll) {
scrollBar.height(this.options.height);
var h = scrollBar.height()-15;
this.options.height = h;
scrollBar.height(h);
}
else {
scrollBar.height(this.options.height);
}
var height = this.options.height-32;
var ratio = height/this.contentHeight;
line.height(height);
if(ratio>=(this.contentHeight-32)/this.contentHeight) {
btn.hide();
}
else {
var btnHeight = ratio*this.options.height;
btn.show().height(btnHeight);
}
},
_horizontalScrollbar: function () {
if(this.scrollbar.find('.scrollbar-h').length<1) {
var str = [];
str[str.length] = '<div class="scrollbar-h">';
str[str.length] = '<div class="scrollbar-h-up"></div>';
str[str.length] = '<div class="scrollbar-h-down"></div>';
str[str.length] = '<div class="scrollbar-line-h">';
str[str.length] = '<div class="scrollbar-line-h-btn"></div>';
str[str.length] = '</div>';
str[str.length] = '</div>';
str = str.join('');
this.scrollbar.append(str);
}
else {
this.scrollbar.find('.scrollbar-h').show();
}
var line = this.scrollbar.find('.scrollbar-line-h');
var btn = this.scrollbar.find('.scrollbar-line-h-btn');
var scrollBar = this.scrollbar.find('.scrollbar-h');
if(this.bothScroll) {
scrollBar.width(this.options.width);
var w = scrollBar.width()-15;
this.options.width = w;
scrollBar.width(w);
}
else {
scrollBar.width(this.options.width);
}
var width = this.options.width-32;
var ratio = width/this.contentWidth;
var btnWidth = ratio*this.options.width;
var l = (!isNaN(parseInt(this.element.css('left')))) ? parseInt(this.element.css('left')) : 0;
var left = Math.abs(l)*ratio;
line.width(width);
if(ratio>=(this.contentWidth-32)/this.contentWidth) {
btn.hide();
}
else {
btn.show().width(btnWidth).css({
left:left
});
}
},
_startHandlers: function () {
if(this.handlers) {
return false;
}
this.handlers = true;
var that = this;
$(document).mousemove(function(e){
that._drag(e);
});
$(document).mouseup(function(e){
that._dragEnd(e);
});
this.scrollbar.find('.scrollbar-line-v-btn,.scrollbar-line-h-btn').on('mousedown', function(e){
that._dragStart(e, $(this));
});
this.scrollbar.find('.scrollbar-line-v,.scrollbar-line-h').on('click', function(e){
that._clickPos(e, $(this));
});
this.scrollbar.find('.scrollbar-v-up,.scrollbar-h-up').on('click', function(e){
that._fixScroll(1,$(this));
});
this.scrollbar.find('.scrollbar-v-down,.scrollbar-h-down').on('click', function(e){
that._fixScroll(-1,$(this));
});
this.scrollbar.mousewheel(function(e, delta) {
that._fixScroll(delta);
return false;
});
},
_removeHandlers: function () {
if(!this.handlers) {
return false;
}
this.handlers = false;
var that = this;
$(document).mousemove(function(e){
return false;
});
$(document).mouseup(function(e){
return false;
});
this.scrollbar.find('.scrollbar-line-v-btn,.scrollbar-line-h-btn').off('mousedown');
this.scrollbar.find('.scrollbar-line-v,.scrollbar-line-h').off('click');
this.scrollbar.find('.scrollbar-v-up,.scrollbar-h-up').off('click');
this.scrollbar.find('.scrollbar-v-down,.scrollbar-h-down').off('click');
},
_clickPos: function (e,elem) {
if($(e.target).attr('class') == 'scrollbar-line-v' || $(e.target).attr('class') == 'scrollbar-line-h') {
var offset = elem.offset();
if($(e.target).attr('class') == 'scrollbar-line-v') {
var top = e.pageY - offset.top;
var btn = elem.find('.scrollbar-line-v-btn');
this.dragElem = {
elem: btn,
width: btn.width(),
height: btn.height(),
parent: elem,
parentWidth: elem.width(),
parentHeight: elem.height(),
parentOffset: offset
};
this._scrollTo(0,top,'y');
this.dragElem = null;
}
else {
var left = e.pageX - offset.left;
var btn = elem.find('.scrollbar-line-h-btn');
this.dragElem = {
elem: btn,
width: btn.width(),
height: btn.height(),
parent: elem,
parentWidth: elem.width(),
parentHeight: elem.height(),
parentOffset: offset
};
this._scrollTo(left,0,'x');
this.dragElem = null;
}
}
},
_fixScroll: function (delta,elem) {
var step = this.options.wheel;
if( (elem !== undefined && (elem.hasClass('scrollbar-h-up') || elem.hasClass('scrollbar-h-down'))) || this.options.axis == 'x' || (this.options.axis != 'x' && this.options.axis != 'y' && this.scrollbar.find('.scrollbar-v').length<1)) {
var percent = step/this.contentWidth*100;
var barStep = (this.options.width-32)/100*percent;
var leftCss = parseInt(this.element.css('left'));
var pos = (!isNaN(leftCss)) ? Math.abs(leftCss) : 0;
var btn = this.scrollbar.find('.scrollbar-line-h-btn');
var parent = this.scrollbar.find('.scrollbar-line-h');
var barLeftCss = parseFloat(btn.css('left'));
var barPos = (!isNaN(barLeftCss)) ? barLeftCss : 0;
if(delta>0) {
var left = pos-step;
var barLeft = barPos-barStep;
}
else {
var left = pos+step;
var barLeft = barPos+barStep;
}
if(left<0) {
left = 0;
}
if(left>this.contentWidth-this.options.width) {
left = this.contentWidth-this.options.width;
}
var parentsSize = {
width: parent.width(),
height: parent.height()
};
var dragElemSize = {
width: btn.width(),
height: btn.height()
};
if(barLeft<0) {
barLeft = 0;
}
if(barLeft+dragElemSize.width>parentsSize.width) {
barLeft = parentsSize.width-dragElemSize.width;
}
this.element.css({
left: left*(-1)
});
btn.css({
left: barLeft
});
}
else {
var percent = step/this.contentHeight*100;
var barStep = (this.options.height-32)/100*percent;
var topCss = parseInt(this.element.css('top'));
var pos = (!isNaN(topCss)) ? Math.abs(topCss) : 0;
var btn = this.scrollbar.find('.scrollbar-line-v-btn');
var parent = this.scrollbar.find('.scrollbar-line-v');
var barTopCss = parseFloat(btn.css('top'));
var barPos = (!isNaN(barTopCss)) ? barTopCss : 0;
if(delta>0) {
var top = pos-step;
var barTop = barPos-barStep;
}
else {
var top = pos+step;
var barTop = barPos+barStep;
}
if(top<0) {
top = 0;
}
if(top>this.contentHeight-this.options.height) {
top = this.contentHeight-this.options.height;
}
var parentsSize = {
width: parent.width(),
height: parent.height()
};
var dragElemSize = {
width: btn.width(),
height: btn.height()
};
if(barTop<0) {
barTop = 0;
}
if(barTop+dragElemSize.height>parentsSize.height) {
barTop = parentsSize.height-dragElemSize.height;
}
this.element.css({
top: top*(-1)
});
btn.css({
top: barTop
});
}
},
_scrollTo: function (left,top,xy) {
if(xy == 'x') {
var width = this.options.width-32;
var ratio = width/this.contentWidth;
var currLeft = left/ratio;
if(currLeft<0) {
currLeft = 0;
}
if(currLeft>this.contentWidth-this.options.width) {
currLeft = this.contentWidth-this.options.width;
}
if(left<0) {
left = 0;
}
if(left>this.dragElem.parentWidth-this.dragElem.width) {
left = this.dragElem.parentWidth-this.dragElem.width;
}
this.dragElem.elem.css({
left:left
});
this.element.css({
left: currLeft*(-1)
});
}
else {
var height = this.options.height-32;
var ratio = height/this.contentHeight;
var currTop = top/ratio;
if(currTop<0) {
currTop = 0;
}
if(currTop>this.contentHeight-this.options.height) {
currTop = this.contentHeight-this.options.height;
}
if(top<0) {
top = 0;
}
if(top>this.dragElem.parentHeight-this.dragElem.height) {
top = this.dragElem.parentHeight-this.dragElem.height;
}
this.dragElem.elem.css({
top:top
});
this.element.css({
top: currTop*(-1)
});
}
},
_scroll: function () {
if(this.dragElem.elem.hasClass('scrollbar-line-h-btn')) {
var width = this.options.width-32;
var ratio = width/this.contentWidth;
var leftCss = parseInt(this.dragElem.elem.css('left'));
var leftCurr = (!isNaN(leftCss)) ? Math.abs(leftCss) : 0;
var left = leftCurr/ratio;
if(left<0) {
left = 0;
}
if(left>this.contentWidth-this.options.width) {
left = this.contentWidth-this.options.width;
}
this.element.css({
left: left*(-1)
});
}
else {
var height = this.options.height-32;
var ratio = height/this.contentHeight;
var topCss = parseInt(this.dragElem.elem.css('top'));
var topCurr = (!isNaN(topCss)) ? Math.abs(topCss) : 0;
var top = topCurr/ratio;
if(top<0) {
top = 0;
}
if(top>this.contentHeight-this.options.height) {
top = this.contentHeight-this.options.height;
}
this.element.css({
top: top*(-1)
});
}
},
_startCoordsDiff: function (e) {
var offset = this.dragElem.elem.offset();
this.startCoords.x = e.pageX - offset.left;
this.startCoords.y = e.pageY - offset.top;
},
_dragStart: function (e,elem) {
var parent = elem.parents().first();
this.dragElem = {
elem: elem,
width: elem.width(),
height: elem.height(),
parent: parent,
parentWidth: parent.width(),
parentHeight: parent.height(),
parentOffset: parent.offset()
};
this.dragStart = true;
this.currCoords.x = e.pageX;
this.currCoords.y = e.pageY;
this._startCoordsDiff(e);
},
_drag: function (e) {
if( this.dragStart ) {
this.currCoords.x = e.pageX;
this.currCoords.y = e.pageY;
var left = this.currCoords.x - this.startCoords.x - this.dragElem.parentOffset.left;
var top = this.currCoords.y - this.startCoords.y - this.dragElem.parentOffset.top;
if(left<0) {
left = 0;
}
if(left+this.dragElem.width>=this.dragElem.parentWidth) {
left = this.dragElem.parentWidth-this.dragElem.width;
}
if(top<0) {
top = 0;
}
if(top+this.dragElem.height>this.dragElem.parentHeight) {
top = this.dragElem.parentHeight-this.dragElem.height;
}
this.dragElem.elem.css({
left: left,
top: top
});
this._scroll();
}
},
_dragEnd: function (e) {
if(this.dragStart) {
this.dragElem = null;
this.dragStart = false;
this.startCoords.x = 0;
this.startCoords.y = 0;
this.currCoords.x = null;
this.currCoords.y = null;
}
},
_destroy: function() {
},
_setOption: function(key, value) {
this._super('_setOption', key, value);
}
})
})( jQuery );