如何用图像创建Javascipt / HTML5 Spinner列表? [英] How to create Javascipt/HTML5 Spinner List with images?
问题描述
目标:使用图片(而不是文字)创建Javascript / HTML5旋转列表,以便用户输入重量和高度。 (示例图片/资源如下)。
环境/应用程序:使用Cordova / Ionic构建移动应用程序。只支持iOS(webkit css)。
有没有任何组件允许我实现这一点?
图片:
>
给你一些想法如何可能实现一个微调。已使用Opera,Firefox和Chrome for Android测试。
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){//点击位置处理。 // xPosition和yPosition相对于元素边界。 // 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){//帮助函数//源: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 getClickPosition,false);
#spinner {background:url http://i.stack.imgur.com/0Fc85m.png); background-size:100%100%;背景重复:无重复; height:150px; width:300px;}#number {background:url(http://i.stack.imgur.com/c0ufam.png);背景重复:无重复; background-size:100%600px; height:150px; width:50px; margin-left:20px;}
< div id = spinner> < div id =number> < / div>< / div>< br />< div id =value>值:0< / div>
>
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:
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>
这篇关于如何用图像创建Javascipt / HTML5 Spinner列表?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!