我正在尝试使用
Jquery UI Sortable进行缩放.问题是鼠标不会像拖动的元素一样移动.有很多关于如何使用Draggable工作的例子.以下是Draggable项目的解决方法示例：
http://jsfiddle.net/TqUeS/660/
var zoom = $('#canvas').css('zoom');
var canvasHeight = $('#canvas').height();
var canvasWidth = $('#canvas').width();
$('.dragme').draggable({
drag: function(evt,ui)
{
// zoom fix
ui.position.top = Math.round(ui.position.top / zoom);
ui.position.left = Math.round(ui.position.left / zoom);
// don't let draggable to get outside of the canvas
if (ui.position.left < 0)
ui.position.left = 0;
if (ui.position.left + $(this).width() > canvasWidth)
ui.position.left = canvasWidth - $(this).width();
if (ui.position.top < 0)
ui.position.top = 0;
if (ui.position.top + $(this).height() > canvasHeight)
ui.position.top = canvasHeight - $(this).height();
}
});
我希望Drag事件可以在Sortable版本的Sort事件中被替换,但是从下面的小提琴中可以看出它不起作用.在sort事件中设置ui.position没有任何效果 – 似乎在事件触发后设置它并丢弃它.
http://jsfiddle.net/TqUeS/658/
var zoom = $('#canvas').css('zoom');
var canvasHeight = $('#canvas').height();
var canvasWidth = $('#canvas').width();
$('#canvas').sortable({
items: "div",sort: function(evt,ui)
{
// zoom fix
ui.position.top = Math.round(ui.position.top / zoom);
ui.position.left = Math.round(ui.position.left / zoom);
// don't let draggable to get outside of the canvas
if (ui.position.left < 0)
ui.position.left = 0;
if (ui.position.left + $(this).width() > canvasWidth)
ui.position.left = canvasWidth - $(this).width();
if (ui.position.top < 0)
ui.position.top = 0;
if (ui.position.top + $(this).height() > canvasHeight)
ui.position.top = canvasHeight - $(this).height();
}
});
如果有人有其他解决方法,我很乐意听到.
解决方法
可拖动和可排序的轻微差异.一般来说,ui.helper是项目,位置不会以同样的方式影响,它只是一个报告的位置.
对于可拖动,拖动ui.position,它指出：
Current CSS position of the helper as
{ top,left }object. The values may be changed to modify where the element will be positioned. This is useful for custom containment,snapping,etc.
对于Sortable,对于ui.position,它指出：
The current position of the helper represented as
{ top,left }.
尝试这个：
示例：http://jsfiddle.net/Twisty/4nv60ob9/2/
HTML
<div id="canvas" data-zoom="0.5"> <div class="dragme"></div> <div class="dragme"></div> <div class="dragme"></div> </div> <div id="report"></div>
JavaScript的
var zoom = $("#canvas").data("zoom");
console.log(typeof zoom,zoom.toString());
var canvasHeight = $('#canvas').height();
var canvasWidth = $('#canvas').width();
$('#canvas').sortable({
items: "div",start: function(e,ui) {
console.log("Sort Start Triggered");
},ui) {
console.log("Sort Triggered");
// zoom fix
ui.position.top = Math.round(ui.position.top / zoom);
ui.position.left = Math.round(ui.position.left / zoom);
$("#report").html("Top: " + ui.position.top + " Left: " + ui.position.left);
// don't let draggable to get outside of the canvas
if (ui.position.left < 0) {
ui.helper.css("left",0);
}
if (ui.position.left + ui.helper.width() > canvasWidth) {
ui.helper.css("left",(canvasWidth - ui.helper.width()) + "px");
}
if (ui.position.top < 0) {
ui.helper.css("top",0);
}
if (ui.position.top + ui.helper.height() > canvasHeight) {
ui.helper.css("top",(canvasHeight - ui.helper.height()) + "px");
}
$("#report").html("Top: " + (canvasHeight - ui.helper.height()) + " Left: " + (canvasWidth - ui.helper.width()));
}
});
我认为这是以同样的方式工作的.