jquery 面板拖拽

在网上找了好多的例子都不满足我所需要在网上找了一篇关于easyui是一个拓展的demo 然后根据demo 把我所需要的东西进行再次拓展满足我的需求

也不多说了上代码

首先你肯定是要导easyui的js的

(function ($) {
function init(target) {
$(target).addClass('portal');
var table = $('<table border="0" cellspacing="0" cellpadding="0"><tr></tr></table>').appendTo(target);
var tr = table.find('tr');

var columnWidths = [];
var totalWidth = 0;
$(target).children('div:first').addClass('portal-column-left');
$(target).children('div:last').addClass('portal-column-right');
$(target).find('>div').each(function () { // each column panel
var column = $(this);
totalWidth += column.outerWidth();
columnWidths.push(column.outerWidth());

$(target).bind('_resize', function () {
var opts = $.data(target, 'portal').options;
if (opts.fit == true) {
setSize(target);
}
return false;
});

return columnWidths;
}

var hasScroll = t.find('>table').outerHeight() > t.height();
var width = t.width();
var columnWidths = $.data(target, 'portal').columnWidths;
var leftWidth = 0;

// calculate and set every column size
for (var i = 0; i < columnWidths.length; i++) {
var p = t.find('div.portal-column:eq(' + i + ')');
var w = Math.floor(width * columnWidths[i]);
if (i == columnWidths.length - 1) {
// w = width - leftWidth - (hasScroll == true ? 28 : 10);
w = width - leftWidth - (hasScroll == true ? 18 : 0);
}
p._outerWidth(w);
leftWidth += p.outerWidth();

// resize every panel of the column
p.find('div.portal-p').panel('resize', { p.width() });
}
opts.onResize.call(target, opts.width, opts.height);
}

var opts = $.data(target, 'portal').options;
opts.onStateChange.call(target);
}
});

/**
* find which panel the cursor is over
*/
function findPanel(e, source) {
var result = null;
$(target).find('div.portal-p').each(function () {
var pal = $(this).panel('panel');
if (pal[0] != source) {
var pos = pal.offset();
if (e.pageX > pos.left && e.pageX < pos.left + pal.outerWidth()
&& e.pageY > pos.top && e.pageY < pos.top + pal.outerHeight()) {
if (e.pageY > pos.top + pal.outerHeight() / 2) {
result = {
target: pal,
pos: 'down'
};
} else {
result = {
target: pal,
pos: 'up'
}
}
}
}
});
return result;
}

/**
* find which portal column the cursor is over
*/
function findColumn(e) {
var result = null;
$(target).find('div.portal-column').each(function () {
var pal = $(this);
var pos = pal.offset();
if (e.pageX > pos.left && e.pageX < pos.left + pal.outerWidth()) {
result = pal;
}
});
return result;
}

/**
* set the spacer size
*/
function setSpacerSize(width, height) {
spacer._outerWidth(width);
if (height) {
spacer._outerHeight(height);
}
}
}

$.fn.portal = function (options, param) {
if (typeof options == 'string') {
return $.fn.portal.methods[options](this, param);
}
options = options || {};
return this.each(function () {
var state = $.data(this, 'portal');
if (state) {
$.extend(state.options, options);
} else {
state = $.data(this, 'portal', {
options: $.extend({}, $.fn.portal.defaults, $.fn.portal.parseOptions(this), options),
columnWidths: init(this)
});
}
if (state.options.border) {
$(this).removeClass('portal-noborder');
} else {
$(this).addClass('portal-noborder');
}
setSize(this);
});
};

$.fn.portal.methods = {
options: function (jq) {
return $.data(jq[0], 'portal').options;
},
resize: function (jq, param) {
return jq.each(function () {
if (param) {
var opts = $.data(this, 'portal').options;
if (param.width) opts.width = param.width;
if (param.height) opts.height = param.height;
}
setSize(this);
});
},
getPanels: function (jq, columnIndex) {
var c = jq; // the panel container
if (columnIndex >= 0) {
c = jq.find('div.portal-column:eq(' + columnIndex + ')');
}
var panels = [];
c.find('div.portal-p').each(function () {
panels.push($(this));
});
return panels;
},
add: function (jq, param) { // param: {panel,columnIndex}
return jq.each(function () {
if (!param || !$.isNumeric(param.columnIndex) || !param.panel) { return; }
var portal = $(this), opts = portal.portal("options");
if (opts.onBeforeAdd.call(this, param.columnIndex, param.panel) == false) { return; }
var c = portal.find('div.portal-column:eq(' + param.columnIndex + ')');
var p = param.panel.addClass('portal-p');
p.panel('panel').addClass('portal-panel').appendTo(c);
makeDraggable(this, p);
p.panel('resize', { c.width() });
var panelOpts = p.panel("options"), onClose = panelOpts.onClose;
panelOpts.onClose = function () {
if ($.isFunction(onClose)) { onClose.apply(this, arguments); }
if (!p.length) { return; }
var body = $("body");
if ($.contains(body[0], p[0])) { p.panel("destroy"); }
}
opts.onAdd.call(this, param.columnIndex, param.panel);
});
},
remove: function (jq, panel) {
return jq.each(function () {
var p = $(this), opts = p.portal("options");
if (opts.onBeforeRemove.call(this, panel) == false) { return; }
var panels = p.portal('getPanels'), panelOpts = panel.panel("options");
for (var i = 0; i < panels.length; i++) {
var p = panels[i];
if (p[0] == $(panel)[0]) {
p.panel('destroy');
}
}
opts.onRemove.call(this, panelOpts);
});
},
addColumn: function (jq) {
return jq.each(function () {
var state = $.data(this, "portal"), opts = state.options, columnWidths = state.columnWidths,
portal = $(this), totalWidth = portal.outerWidth(),
tr = portal.find(">table tr"), td = $("<td></td>").addClass("portal-column-td").appendTo(tr),
column = $("<div></div>").addClass("portal-column").appendTo(td),
width = parseFloat(1) / (columnWidths.length + 1);
if (opts.onBeforeAddColumn.call(this, columnWidths.length) == false) { return; }
for (var i = 0; i < columnWidths.length; i++) { columnWidths[i] = width; }
columnWidths.push(width);
tr.find(">td>div.portal-column").removeClass("portal-column-left portal-column-right");
tr.find(">td>div.portal-column:first").addClass("portal-column-left");
tr.find(">td>div.portal-column:last").addClass("portal-column-right");
setSize(this);
opts.onAddColumn.call(this, columnWidths.length - 1);
});
},
removeColumn: function (jq, index) {
return jq.each(function () {
var state = $.data(this, "portal"), opts = state.options, columnWidths = state.columnWidths;
if (!$.isNumeric(index) || !columnWidths || !columnWidths.length || index > columnWidths.length - 1) { return; }
if (opts.onBeforeRemoveColumn.call(this, index) == false) { return; }
var tr = $(this).find(">table tr"), width = parseFloat(1) / (columnWidths.length - 1);
columnWidths.pop();
for (var i = 0; i < columnWidths.length; i++) { columnWidths[i] = width; }
tr.find(">td:eq(" + index + ")").remove();
tr.find(">td>div.portal-column").removeClass("portal-column-left portal-column-right");
tr.find(">td>div.portal-column:first").addClass("portal-column-left");
tr.find(">td>div.portal-column:last").addClass("portal-column-right");
setSize(this);
opts.onRemoveColumn.call(this, index);
});
},
columns: function (jq) {
return $.data(jq[0], "portal").columnWidths.length;
},
disableDragging: function (jq, panel) {
panel.panel('panel').draggable('disable');
return jq;
},
enableDragging: function (jq, panel) {
panel.panel('panel').draggable('enable');
return jq;
}
};

$.fn.portal.parseOptions = function (target) {
return $.extend({}, $.parser.parseOptions(target, ["width", "height", { border: "boolean", fit: "boolean" }]));
};

$.fn.portal.defaults = {
'auto',
height: 'auto',
border: true,
fit: false,
onResize: function (width, height) { },
onStateChange: function () { },

onBeforeAdd: function (columnIndex, panel) { },
onAdd: function (columnIndex, panel) { },

onBeforeAddColumn: function (columnIndex) { },
onAddColumn: function (columnIndex) { },

onBeforeRemove: function (panel) { },
onRemove: function (panelOption) { },

onBeforeRemoveColumn: function (columnIndex) { },
onRemoveColumn: function (columnIndex) { }
};

$.parser.plugins.push("portal");

})(jQuery);

</script>

本文来自：http://jqext.sinaapp.com/