Beispiel: ohne großes Framework
Bei meiner Suche nach einer Scroll Komponente bin ich auf alle möglichen Probleme gestoßen. In einigen führte die Anzeige von ImageMaps zu Problemen, sie brauchten zusätzlich noch jQuery und die Länge des Codes war eigentlich auch nicht passabel.
Also zur Sache, die hier gezeigte Komponente unterstützt alle aktuellen Browser. Eine Liste der unterstützten Touch Devices werde ich noch aufführen. Es wird sowohl Touch, Mouse als auch Mousewheel unterstützt. Beim verlassen des Scroll-Objektes endet das Scrollen, bei anderen Komponenten war das nicht so, das hatte mich auch gestört. Es werden keine Wrapper-DIVs benötigt, es muss nur ein Script-Datei eingebunden werden die gerade mal 262 Zeilen lang ist,... den Gummiband-Effekt des Scroll-Balkens der dann entsteht wenn man über das Ende hinaus scrollt könnte man noch realisieren.
Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet.
Duis autem vel eum iriure dolor in hendrerit in vulputate velit esse molestie consequat, vel illum dolore eu feugiat nulla facilisis at vero eros et accumsan et iusto odio dignissim qui blandit praesent luptatum zzril delenit augue duis dolore te feugait nulla facilisi. Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut laoreet dolore magna aliquam erat volutpat.
Ut wisi enim ad minim veniam, quis nostrud exerci tation ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat. Duis autem vel eum iriure dolor in hendrerit in vulputate velit esse molestie consequat, vel illum dolore eu feugiat nulla facilisis at vero eros et accumsan et iusto odio dignissim qui blandit praesent luptatum zzril delenit augue duis dolore te feugait nulla facilisi.
Nam liber tempor cum soluta nobis eleifend option congue nihil imperdiet doming id quod mazim placerat facer possim assum. Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut laoreet dolore magna aliquam erat volutpat. Ut wisi enim ad minim veniam, quis nostrud exerci tation ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat.
Duis autem vel eum iriure dolor in hendrerit in vulputate velit esse molestie consequat, vel illum dolore eu feugiat nulla facilisis.
At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet, consetetur sadipscing elitr, At accusam aliquyam diam diam dolore dolores duo eirmod eos erat, et nonumy sed tempor et et invidunt justo labore Stet clita ea et gubergren, kasd magna no rebum. sanctus sea sed takimata ut vero voluptua. est Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat.
Consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus.
HTML:
<!DOCTYPE html >
<html>
<head>
<meta charset="utf-8" />
<title>scroll</title>
</head>
<body>
<div class="scroll">
<p>Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet.</p>
<p>Duis autem vel eum iriure dolor in hendrerit in vulputate velit esse molestie consequat, vel illum dolore eu feugiat nulla facilisis at vero eros et accumsan et iusto odio dignissim qui blandit praesent luptatum zzril delenit augue duis dolore te feugait nulla facilisi. Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut laoreet dolore magna aliquam erat volutpat.</p>
<p>Ut wisi enim ad minim veniam, quis nostrud exerci tation ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat. Duis autem vel eum iriure dolor in hendrerit in vulputate velit esse molestie consequat, vel illum dolore eu feugiat nulla facilisis at vero eros et accumsan et iusto odio dignissim qui blandit praesent luptatum zzril delenit augue duis dolore te feugait nulla facilisi.</p>
<p>Nam liber tempor cum soluta nobis eleifend option congue nihil imperdiet doming id quod mazim placerat facer possim assum. Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut laoreet dolore magna aliquam erat volutpat. Ut wisi enim ad minim veniam, quis nostrud exerci tation ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat.</p>
<p>Duis autem vel eum iriure dolor in hendrerit in vulputate velit esse molestie consequat, vel illum dolore eu feugiat nulla facilisis.</p>
<p>At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet, consetetur sadipscing elitr, At accusam aliquyam diam diam dolore dolores duo eirmod eos erat, et nonumy sed tempor et et invidunt justo labore Stet clita ea et gubergren, kasd magna no rebum. sanctus sea sed takimata ut vero voluptua. est Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat.</p>
<p>Consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus.</p>
</div>
<script src="jsScroll.js"></script>
</body>
</html>Javascript:
function MyScroll() {
this.object = null;
this.content = null;
this.isTouchDevice = false;
this.start = false;
this.scrollbar = null;
this.scroller = null;
this.startX = 0;
this.startY = 0;
this.curX = 0;
this.curY = 0;
this.lastMove = null;
}
MyScroll.prototype = {
touchStart: function (event) {
if (event.type === 'touchstart') { //touch event
// check that only one finger is touching the screen
if (event.touches.length === 1) {
// get the coordinates of the touch
this.start = true;
this.startX = event.touches[0].pageX;
this.startY = event.touches[0].pageY;
} else {
// more than one finger touched so cancel
this.touchCancel(event);
}
} else {
if (event.button === 0) { // mouse event
this.start = true;
this.startX = event.pageX;
this.startY = event.pageY;
} else { // old IE mouse event
this.start = true;
this.startX = event.clientX + document.body.scrollLeft;
this.startY = event.clientY + document.body.scrollTop;
}
}
},
touchMove: function (event) {
if (this.start) {
var bScroll = false;
if (event.type === 'touchmove') { // touch event
// check that only one finger is touching the screen
if (event.touches.length === 1) {
this.curX = event.touches[0].pageX;
this.curY = event.touches[0].pageY;
event.preventDefault();
bScroll = true;
} else {
// more than one finger touched so cancel
this.touchCancel(event);
}
} else if (event.pageX) { // mouse event
this.curX = event.pageX;
this.curY = event.pageY;
bScroll = true;
} else { // old IE mouse event
this.curX = event.clientX + document.body.scrollLeft;
this.curY = event.clientY + document.body.scrollTop;
bScroll = true;
}
if (bScroll) {
var X = (this.startX-this.curX);
var Y = (this.startY-this.curY);
this.startX = this.curX;
this.startY = this.curY;
this.scroll(X, Y);
}
}
},
touchEnd: function (event) {
if (this.start) {
//this.touchMove(event);
this.transition();
this.start = false;
}
this.startX = 0;
this.startY = 0;
this.curX = 0;
this.curY = 0;
},
wheel: function(event) { // mouse wheel event
var X = 0, Y = 0;
if (event.wheelDeltaX !== undefined) {
X = event.wheelDeltaX / 6;
Y = event.wheelDeltaY / 6;
} else if(event.wheelDelta !== undefined) {
X = Y = event.wheelDelta / 6;
} else if (event.detail !== undefined) {
X = Y = -event.detail * 6;
} else {
return;
}
this.scroll(0, Y);
},
transition: function() {
this.content.style.top = (parseInt(this.content.style.top, 10) + this.lastMove*10) + 'px';
this.content.style.transition = "top 1s ease-out";
},
transitionend: function(event) {
if (parseInt(this.content.style.top, 10) > 0) {
this.content.style.top = '0px';
}
if (Math.abs(parseInt(this.content.style.top, 10)) > (parseInt(this.content.offsetHeight, 10) - parseInt(this.object.offsetHeight, 10))) {
this.content.style.top = - (parseInt(this.content.offsetHeight, 10) - parseInt(this.object.offsetHeight, 10));
}
this.content.style.transition = "none";
},
scroll: function(X, Y) {
if (this.content.offsetWidth > this.object.offsetWidth) {
this.content.style.left = parseInt(this.content.style.left, 10) - X + 'px';
}
if ((this.content.offsetHeight > this.object.offsetHeight) &&
(((Math.abs(parseInt(this.content.style.top, 10)) < (parseInt(this.content.offsetHeight, 10) - parseInt(this.object.offsetHeight, 10))) && Y>0) ||
((parseInt(this.content.style.top, 10) < 0) && Y<0))) {
this.lastMove = parseInt(this.content.style.top, 10);
this.content.style.top = parseInt(this.content.style.top, 10) - Y + 'px';
this.lastMove = parseInt(this.content.style.top, 10) - this.lastMove;
}
this.scroller.style.top = Math.round((this.scrollbar.offsetHeight ? this.scrollbar.offsetHeight : this.object.offsetHeight) * (Math.abs(parseInt(this.content.style.top, 10)) / parseInt(this.content.offsetHeight, 10))) + "px";
},
resize: function() {
var offsetHeight = (this.scrollbar.offsetHeight ? this.scrollbar.offsetHeight : this.object.offsetHeight);
this.content.style.width = this.object.offsetWidth-10 + "px";
this.scroller.style.height = Math.min(Math.max(Math.round(offsetHeight * (this.object.offsetHeight / this.content.offsetHeight)), 8), offsetHeight-6) + "px";
this.scroller.style.top = Math.round(offsetHeight * (Math.abs(parseInt(this.content.style.top, 10)) / parseInt(this.content.offsetHeight, 10))) + "px";
if (this.content.offsetHeight <= this.object.offsetHeight) {
this.scroller.style.display = "none";
} else {
this.scroller.style.display = "block";
}
},
handle: function(event) {
event || (event = window.event);
switch (event.type) {
case 'mousedown':
case 'touchstart': this.touchStart(event); break;
case 'mousemove':
case 'touchmove': this.touchMove(event); break;
case 'mouseup':
case 'touchend':
case 'mouseout':
case 'touchcancel': this.touchEnd(event); break;
case 'mousewheel':
case 'DOMMouseScroll': this.wheel(event); break;
case 'transitionend':
case 'webkitTransitionEnd':
case 'oTransitionEnd':
case 'MSTransitionEnd': this.transitionend(event); break;
case 'onorientationchange':
case 'resize': this.resize(); break;
}
if (event.preventDefault) {
event.preventDefault();
}
},
bind: function(ev, el) {
var self = this;
if (window.addEventListener !== undefined) { // W3C
var handler = (el || window).addEventListener(ev,
function(event){
self.handle(event);
});
} else if (window.attachEvent) { // old IE
(el || window).attachEvent('on'+ev, function(event){self.handle(event);});
} else { // fallback
(el || window)['on'+ev] = function(event){self.handle(event);};
}
},
unbind: function (ev, el) {
if (window.removeEventListener !== undefined) { // W3C
(el || this.scroller).removeEventListener(ev, this, !!bubble);
}
},
init: function(scroll) {
this.object = scroll;
if (scroll.style.position === "") {
scroll.style.position = "relative";
}
scroll.style.overflow = "hidden";
this.content = document.createElement("div");
while (scroll.hasChildNodes()) {
this.content.appendChild(scroll.removeChild(scroll.firstChild));
}
scroll.appendChild(this.content);
this.content.style.position = "absolute";
this.content.style.left = '0px';
this.content.style.top = '0px';
//create scrollbar
this.scrollbar = document.createElement("div");
this.scrollbar.style.position = "absolute";
this.scrollbar.style.width = "7px";
this.scrollbar.style.bottom = "2px";
this.scrollbar.style.top = "2px";
this.scrollbar.style.right = "1px";
this.object.appendChild(this.scrollbar);
this.scroller = document.createElement("div");
this.scroller.style.position = "absolute";
this.scroller.style.backgroundColor = "#7A7A7A";
this.scroller.style.width = "100%";
this.scroller.style.borderRadius = "3px";
this.scroller.style.opacity = 0.5;
this.scrollbar.appendChild(this.scroller);
this.resize();
this.isTouchDevice = (window.ontouchstart !== undefined);
if (this.isTouchDevice) {
this.bind('touchstart', scroll);
this.bind('touchmove', scroll);
this.bind('touchend', scroll);
this.bind('touchcancel', scroll);
} else {
this.bind('mousedown', scroll);
this.bind('mousemove', scroll);
this.bind('mouseup', scroll);
this.bind('mouseout', scroll);
this.bind('mouseover', scroll);
this.bind('mousewheel');
this.bind('DOMMouseScroll');
}
var style = document.documentElement.style;
if (style.transition !== undefined) {
this.bind('transitionend');
}
this.bind('resize');
}
};
var i, els = document.querySelectorAll('div.scroll');
for(i=0; i<els.length; i++) {
els[i].style.border = '1px solid #777';
els[i].style.height = '200px';
els[i].style.position = "relative";
els[i].style.overflowY = 'auto';
// change scroll direction
/*var scroll = new MyScroll();
scroll.init(els[i]);*/
}
