如何创建javascipt的/ HTML5微调列表与图片? [英] How to create Javascipt/HTML5 Spinner List with images?
本文介绍了如何创建javascipt的/ HTML5微调列表与图片?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
目标:创建使用图像(而不是文本),以便用户可以输入体重和身高的一个JavaScript / HTML5微调列表。 (例如图像/资产下文)。
环境/应用:是科尔多瓦/离子来构建移动应用程序。只支持iOS的(WebKit的CSS)。
有没有在那里,让我实现这一目标的任何组件?
图片:
解决方案
这可能给你的是如何可能实现一些微调的想法。经测试使用Opera,Firefox和Android版Chrome。
\r
\r\r
\r VAR NUM_HEIGHT = 55;\r
VAR Y_OFFSET = 50;\r
VAR SPINNER_HEIGHT = 150;\r
\r
变种targetPosition = 0;\r
变种currentPosition = 0;\r
变种DELTAY = 0;\r
\r
功能targetReached(){\r
DELTAY = 0;\r
currentPosition = targetPosition;\r
。的document.getElementById(值)的innerHTML =值:+ currentPosition;\r
}\r
\r
功能移动(){\r
VAR yPosition = -currentPosition * NUM_HEIGHT + DELTAY + Y_OFFSET;\r
。的document.getElementById(数字)style.backgroundPosition =0像素+ yPosition +PX\r
\r
如果(targetPosition> currentPosition){\r
如果(DELTAY> -NUM_HEIGHT){\r
DELTAY = DELTAY - 5;\r
的setTimeout(移动,10);\r
}其他{\r
targetReached();\r
}\r
}否则如果(targetPosition< currentPosition){\r
如果(DELTAY< NUM_HEIGHT){\r
DELTAY = DELTAY + 5;\r
的setTimeout(移动,10);\r
}其他{\r
targetReached();\r
}\r
}\r
}\r
移动();\r
\r
\r
\r
\r
功能getClickPosition(五){\r
//点击位置的处理。\r
// xPosition位置和yPosition是相对于元素的边界。\r
//来源:http://www.kirupa.com/html5/getting_mouse_click_position.htm\r
VAR parentPosition =为getPosition(e.currentTarget);\r
VAR xPosition位置= e.clientX - parentPosition.x;\r
VAR yPosition = e.clientY - parentPosition.y;\r
\r
如果(yPosition> SPINNER_HEIGHT / 2和;&放大器;!currentPosition = 10){\r
targetPosition = currentPosition + 1;\r
}否则如果(yPosition&下; SPINNER_HEIGHT / 2和;&放大器;!currentPosition = 0){\r
targetPosition = currentPosition - 1;\r
}\r
移动();\r
}\r
\r
功能为getPosition(元素){\r
//辅助功能\r
//来源:http://www.kirupa.com/html5/getting_mouse_click_position.htm\r
变种xPosition位置= 0;\r
变种yPosition = 0;\r
而(元素){\r
xPosition位置+ =(element.offsetLeft - element.scrollLeft + element.clientLeft);\r
yPosition + =(element.offsetTop - element.scrollTop + element.clientTop);\r
元素= element.offsetParent;\r
}\r
返回{\r
X:xPosition位置,\r
Y:yPosition\r
};\r
}\r
\r
//的document.getElementById(数字)的addEventListener(点击,getClickPosition,假的)。\r
的document.getElementById(数字)的addEventListener(鼠标按下getClickPosition,FALSE);
\r
#spinner {\r
背景:网址(http://i.stack.imgur.com/0Fc85m.png);\r
背景尺寸:100%100%;\r
背景重复:不重复;\r
高度:150像素;\r
宽度:300像素;\r
}\r
#NUMBER {\r
背景:网址(http://i.stack.imgur.com/c0ufam.png);\r
背景重复:不重复;\r
背景尺寸:100%600px的;\r
高度:150像素;\r
宽度:50像素;\r
保证金左:20像素;\r
}
\r
< DIV ID =微调>\r
< DIV ID =号>\r
< / DIV>\r
< / DIV>\r
< BR />\r
< DIV ID =值>值:0℃; / DIV>
\r
Objective: Create a Javascript/HTML5 spinner list using images (not text) so user may enter weight and height. (example images/assets are below).
Environment/Application: Using Cordova/Ionic to build mobile application. Only supporting iOS (webkit css).
Are there any components out there that allow me to achieve this?
Images:
解决方案
This might give you some an idea of how it is possible to implement a spinner. Tested with Opera, Firefox and Chrome for Android.
var NUM_HEIGHT = 55;
var Y_OFFSET = 50;
var SPINNER_HEIGHT = 150;
var targetPosition = 0;
var currentPosition = 0;
var deltaY = 0;
function targetReached() {
deltaY = 0;
currentPosition = targetPosition;
document.getElementById("value").innerHTML = "Value: " + currentPosition;
}
function move() {
var yPosition = -currentPosition * NUM_HEIGHT + deltaY + Y_OFFSET;
document.getElementById("number").style.backgroundPosition = "0px " + yPosition + "px";
if (targetPosition > currentPosition) {
if (deltaY > -NUM_HEIGHT) {
deltaY = deltaY - 5;
setTimeout(move, 10);
} else {
targetReached();
}
} else if (targetPosition < currentPosition) {
if (deltaY < NUM_HEIGHT) {
deltaY = deltaY + 5;
setTimeout(move, 10);
} else {
targetReached();
}
}
}
move();
function getClickPosition(e) {
// Click position handling.
// xPosition and yPosition are relative to element bounds.
// Source: http://www.kirupa.com/html5/getting_mouse_click_position.htm
var parentPosition = getPosition(e.currentTarget);
var xPosition = e.clientX - parentPosition.x;
var yPosition = e.clientY - parentPosition.y;
if (yPosition > SPINNER_HEIGHT / 2 && currentPosition != 10) {
targetPosition = currentPosition + 1;
} else if (yPosition < SPINNER_HEIGHT / 2 && currentPosition != 0) {
targetPosition = currentPosition - 1;
}
move();
}
function getPosition(element) {
// Helper function
// Source: http://www.kirupa.com/html5/getting_mouse_click_position.htm
var xPosition = 0;
var yPosition = 0;
while (element) {
xPosition += (element.offsetLeft - element.scrollLeft + element.clientLeft);
yPosition += (element.offsetTop - element.scrollTop + element.clientTop);
element = element.offsetParent;
}
return {
x: xPosition,
y: yPosition
};
}
// document.getElementById("number").addEventListener("click", getClickPosition, false);
document.getElementById("number").addEventListener("mousedown", getClickPosition, false);
#spinner {
background: url(http://i.stack.imgur.com/0Fc85m.png);
background-size: 100% 100%;
background-repeat: no-repeat;
height: 150px;
width: 300px;
}
#number {
background: url(http://i.stack.imgur.com/c0ufam.png);
background-repeat: no-repeat;
background-size: 100% 600px;
height: 150px;
width: 50px;
margin-left: 20px;
}
<div id="spinner">
<div id="number">
</div>
</div>
<br />
<div id="value">Value: 0</div>
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