Creating a Mobile Touch Slide Panel with JQuery

http://www.zackgrossbart.com/hackito/touchslider/

DOWNLOAD : https://github.com/zgrossbart/jstouchslide

This bar is boring on a computer, but it comes alive on a mobile device. Grab your iPad or Android device and take a look.

Drag your finger and the items move with you. They follow your speed and keep your momentum. Play with it a little. I’ll wait.

Get the
source code

The sliding touch panel only shows up on mobile platforms. With a mouse it feels clunky, but sliding with your finger just feels right.

This article shows you how to implement a sliding touch panel in JavaScript. jQuery is the only dependency of the touch slider. The rest is pure JavaScript and HTML. It runs fast, feels natural, and works on every mobile device with touch support.


Horizontal Slide View

This is a JavaScript implementation of a mobile style Horizontal Slide View.

Use your finger to drag it left and right to all of the items in the view.

Since this is JavaScript it works on every mobile device with touch support

and

it does a good job with pictures

Each cell of the slider is HTML so you can put anything you want in it

The slider works just like the native application sliders

It snaps each cell into place and supports momentum

Try dragging fast and watch the items fly by

Want to know how it works?

keep reading


Posted by 홍반장水 홍반장水


Prototyping 프로토타이핑
국내도서>컴퓨터/인터넷
저자 : 타드 자키 워플(Todd Zaki Warfel) / 이예나,이재명역
출판 : 인사이트 2011.05.13
상세보기


강행돌파! 아이폰 & 아이패드 앱 개발
국내도서>컴퓨터/인터넷
저자 : 강병우
출판 : 위키북스 2011.01.31
상세보기


Posted by 홍반장水 홍반장水

2011.05.14 충남 여행( 서산 마애삼존불~ 보원사지~ 해미읍성~ 신두사구~백리포, 천리포, 만리포)

오후 늦게 출발해서 밀리는 차를 뚫고 서산 마애삼종불 보고, 근처에 있는 보원사지 들렸다가, 해미읍성으로 이동.
해미읍성에서 물한잔 마시고 신두사구!

신두사구에서 바람 잠깐, 백리포 지나 천리포 지나 만리포로~
만리포에서 숙소 정하고 전라도횟집에서 회에다가 소주 한잔.

다음날 새벽에 서울로 냉큼 출발. 서울 도착하니 오전 9시 전이었다.









이 장소를 Daum지도에서 확인해보세요.
충청남도 서산시 운산면 | 서산 용현리 마애여래삼존상
도움말 Daum 지도
Posted by 홍반장水 홍반장水
Tools for developers

Developers

Tools and documentation on how to create Android applications.







Posted by 홍반장水 홍반장水

http://code.google.com/p/iscroll-js/
http://cubiq.org/iscroll
The overflow:scroll for mobile webkit. Project started because webkit for iPhone does not provide a native way to scroll content inside a fixed size (width/height) div. So basically it was impossible to have a fixed header/footer and a scrolling central area. Until now.

How to use

First of all we need to prevent the default behavior of standard touch events. This is easily done adding preventDefault() to the touchmove event. Then initialize the iScroll object on DOMContentLoaded or on window load. Here an example:

function loaded() {
	document.addEventListener('touchmove', function(e){ e.preventDefault(); });
	myScroll = new iScroll('scroller');
}
document.addEventListener('DOMContentLoaded', loaded);

iScroll takes two parameters. The first is mandatory and is the ID of the element you want to scroll. The second is optional and can be used to pass additional parameters (see below).

On the HTML/CSS side the scrolling area needs to be wrapped by an element which determines the scroller actual size. The following is a common tags configuration for an iScroll.

<div id="wrapper">
    <div id="scroller">
        <ul>
            <li>...</li>
        </ul>
    </div>
</div>

The #wrapper also needs some classes:

#wrapper {
    position:relative;
    z-index:1;
    width:/* your desired width, auto and 100% are fine */;
    height:/* element height */;
    overflow:/* hidden|auto|scroll */;
}

That’s it. Enjoy your scrolling. Have a look at the source code of the online example to get a better idea of how the iScroll works.

Syntax

The iScroll syntax is: iScroll(mixed element_id, object options).

element_id, can be both an object pointing to or a string with the ID name of the element to be scrolled. Example: iScroll(document.getElementsByTagName('div')[1]) or iScroll('scroller')

Accepted options are:

  • hScrollbar: set to false to never show the horizontal scrollbar. The default value true makes the iScroll smartly decide when the scrollbar is needed. Note that if device does not support translate3d hScrollbar is set to false by default.
  • vScrollbar: set to false to never show the vertical bar. The default value true makes the iScroll smartly decide when the scrollbar is needed. Note that if device does not support translate3d vScrollbar is set to false by default.
  • bounce: set to false to prevent the scroller to bounce outside of boundaries (Android behavior). Default true (iPhone behavior).
  • bounceLock:, if set to true the scroller stops bouncing if the content is smaller than the visible area. Default: false (as per native iphone scroll).
  • checkDOMChanges: set to false to prevent auto refresh on DOM changes. If you switch off this feature you have to call iScroll.refresh() function programmatically every time the DOM gets modified. If your code makes many subsequent DOM modifications it is suggested to set checkDOMChanges to false and to refresh the iScroll only once (ie: when all changes have been done). Default true.
  • fadeScrollbar: define wether the scrollbars should fade in/out. Default true on iPhone, false on Android. Set to false for better performance.
  • momentum: set to false to remove the deceleration effect on swipe. Default true on devices that support translate3d.
  • shrinkScrollbar: set to false to remove the shrinking scrollbars when content is dragged over the boundaries. Default true on iPhone, false on Android. It has no impact on performances.
  • desktopCompatibility: for debug purpose you can set this to true to have the script behave on desktop webkit (Safari and Chrome) as it were a touch enabled device.
  • snap: set to true to activate snap scroll.
  • scrollbarColor: changes the color of the scrollbar. It accepts any valid CSS color (default: 'rgba(0,0,0,0.5)'

Note: options must be sent as object not string. Eg:

myScroll = new iScroll(’scroller’, { checkDOMChanges: false, bounce: false, momentum: false });

Snap scroll

When calling iScroll with “snap” option the scrolling area is subdivided into pages and whenever you swipe the scroll position will always snap to the page. Have a look at the screencast to get an idea.

Probably the best way to use “snap” is by calling it without momentum and scrollbars:

new iScroll('scroller', { snap:true, momentum:false, hScrollbar:false, vScrollbar:false });

If you keep momentum, you get a free-scrolling that will always stop to prefixed positions.

To have a perfect snapping experience the scrolling area should be perfectly divisible by the container size. Eg: If the container width is 200px and you have 10 elements, the whole scroller should be 2000px wide. This is not mandatory as iScroll doesn’t break if the last page is smaller than the container.

Methods

  • refresh(): updates all iScroll variables. Useful when the content of the page doesn’t scroll and just “jumps back”. Call refresh() inside a zero setTimeout. Eg: setTimeout(function () { myScroll.refresh() }, 0).
  • scrollTo(x, y, timeout): scrolls to any x,y location inside the scrolling area.
  • scrollToElement(el, runtime): scrolls to any element inside the scrolling area. el must be a CSS3 selector. Eg: scrollToElement("#elementID", '400ms').
  • scrollToPage(pageX, pageY, runtime): if snap option is active, scrolls to any page. pageX and pageY can be an integer or prev/next. Two keywords that snap to previous or next page in the raw. The “carousel” example in the zip file is a good starting point on using the snap feature.
  • destroy(full): completely unloads the iScroll. If called with full set to true, the scroller is also removed from the DOM.

Best practices

DOM Changes – If scrolling doesn’t work after an ajax call and DOM change, try to initialize iScroll with checkDOMChanges: false and call refresh() function once the DOM modifications have been done. If this still doesn’t work try to put refresh() inside a 0ms setTimeout. Eg:

setTimeout(function () { myScroll.refresh(); }, 0);

Performance – CSS animations are heavy on the small device CPU. When too many elements are loaded into the scrolling area expect choppy animation. Try to reduce the number of tags inside the scrolling area to the minimum. Try to use just ULs for lists and Ps for paragraphs. Remember that you don’t actually need an anchor to create a button or send an action, so <li><a href="#" onclick="..." />text</a></li> is a waste of tags. You could remove the anchor and place the click event directly on the LI tag.

Try to avoid box-shadow and CSS gradients (especially on Android). I know they are cool and classy, but they don’t play well with CSS animations. Webkit on iPhone seems to handle shadows and gradients a bit better than its counterpart on Android, so you may selectively add/remove features based on the device.

Use a flat color for the #wrapper background, images in the scroller wrapper once again reduce performance.

Important: to preserve resources on devices that don’t support translate3d (namely: Android<2.0) iScroll disables momentum, scrollbars and bounce. You can however reactivate them using the respective options.

Posted by 홍반장水 홍반장水