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如何隨着元素替換每個其他地方一樣更改佔位符。如何像元素替換每個其他地方一樣更改佔位符?
請看例子
https://jsfiddle.net/98h31o9v/11/
的JavaScript
indexOfCell = 0;
添加框#div元素
$('#add_box').on('click', function() {
var cell = $("<div></div>");
var elementObj = cell.get(0);
$('#div').append(elementObj);
cell.addClass('content-box').attr('id', 'box_' + indexOfCell);
cell.text(indexOfCell);
indexOfCell += 1;
console.log(elementObj);
$(cell).draggable({
helper: 'original',
zIndex: 10001,
start: function(event, ui) {
if ($(this).data('placeholder') === undefined) {
$(this).data('placeholder', createPlaceholder($(this)));
}
setPlaceHolder($(this).data('placeholder'), $(this));
$(this).after($(this).data('placeholder'));
},
stop: function(event, ui) {
$(this).css('left', $(this).data('placeholder').css('left'));
$(this).css('top', $(this).data('placeholder').css('top'));
$(this).data('placeholder').after($(this));
$(this).data('placeholder').detach();
}
});
$(cell).droppable({
tolerance: 'intersect',
greedy: true,
over: function(event, ui) {
replaceTwoItem(ui.draggable.data('placeholder'), $(this));
}
});
創建佔位
function createPlaceholder(that) {
var className = that.attr('class');
var placeholder = $(document.createElement(that.get(0).nodeName))
.addClass(className || className + " ui-sortable-placeholder")
.removeClass("ui-sortable-helper").css({
background: 'yellow',
border: '1px solid grey'
});
return placeholder;
}
設置佔位符細胞
function setPlaceHolder(placeholder, cell) {
placeholder.css('width', cell.width());
placeholder.css('height', cell.height());
placeholder.css("display", 'block');
placeholder.css('position', 'absolute');
placeholder.css('top', cell.css('top'));
placeholder.css('left', cell.css('left'));
}
替代兩個項目時拖動
function replaceTwoItem(itemFrom, itemTo) {
var itemToInsert;
var action;
if (itemFrom.index() === 0) {
itemToInsert = itemFrom.parent();
action = "prepend";
} else {
itemToInsert = itemFrom.prev();
action = "after";
}
itemTo.before(itemFrom);
if (itemTo.get(0) != itemToInsert.get(0)) {
if (action == 'prepend') {
itemToInsert.prepend(itemTo);
} else if (action == 'after') {
itemToInsert.after(itemTo);
}
}
}
});
HTML
<button id="add_box">AddBox</button>
<div id="div">
</div>
CSS
.content-box {
width: 100px;
height: 100px;
background: green;
margin: 5px;
float: left;
}
不確定你在問什麼? 「改變佔位符就像元素替換其他地方一樣」是什麼意思?你想不想改變移動物品的顏色或其他東西? – Yass
我想更改可拖動的項目佔位符顏色 – codebrackets
此刻,只有第一個項目具有可見的佔位符。你想改變第一個項目的黃色背景嗎? – Yass