angularjs modal模态框----创建可拖动的指令集

//最近项目中需要将angular-ui-bootstrap中用到的弹出框，使之可拖动，由于源文件中没有实现，需要自己实现指令，以下即为该指令，亲测可以实现。

.directive('draggable', ['$document', function($document) {return function(scope, element, attr) {var startX = 0, startY = 0, x = 0, y = 0;element= angular.element(document.getElementsByClassName("modal-dialog")); element.css({position: 'relative',cursor: 'move'});element.on('mousedown', function(event) {// Prevent default dragging of selected contentevent.preventDefault();startX = event.pageX - x;startY = event.pageY - y;$document.on('mousemove', mousemove);$document.on('mouseup', mouseup);});function mousemove(event) {y = event.pageY - startY;x = event.pageX - startX;element.css({top: y 'px',left: x 'px'});}function mouseup() {$document.off('mousemove', mousemove);$document.off('mouseup', mouseup);}};}]);

如图：已不在屏幕中央，为拖动后的效果

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