1.相关地址：
插件下载：https://github.com/fatlinesofcode/ngDraggable/blob/master/ngDraggable.js
2.讲解
姓名：{{item.name}}，年龄：{{item.age}}
插件下载：https://github.com/fatlinesofcode/ngDraggable/blob/master/ngDraggable.js
ng-drag : 表示该元素能够被拖动
ng-drag-data : 表示拖动元素时跟着被拖走的数据
ng-drop : 表示该元素内可放置被拖动的元素
ng-drop-success : 放置在ngd-drop所在元素里后触发，一般写事件.
ng-drop-success触发的dropComplete方法的参数说明：
页面代码
js代码
};
4.拖拽交换示例
页面代码
JS代码
/*
https://github.com/fatlinesofcode/ngDraggable
*/
angular.module("ngDraggable",[])
.service('ngDraggable',[function() {
var scope = this;
scope.inputEvent = function(event) {
if (angular.isDefined(event.touches)) {
return event.touches[0];
}
//Checking both is not redundent. If only check if touches isDefined,angularjs isDefnied will return error and stop the remaining scripty if event.originalEvent is not defined.
else if (angular.isDefined(event.originalEvent) && angular.isDefined(event.originalEvent.touches)) {
return event.originalEvent.touches[0];
}
return event;
};
}])
.directive('ngDrag',['$rootScope','$parse','$document','$window','ngDraggable',function ($rootScope,$parse,$document,$window,ngDraggable) {
return {
restrict: 'A',link: function (scope,element,attrs) {
scope.value = attrs.ngDrag;
var offset,_centerAnchor=false,_mx,_my,_tx,_ty,_mrx,_mry;
var _hasTouch = ('ontouchstart' in window) || window.DocumentTouch && document instanceof DocumentTouch;
var _pressEvents = 'touchstart mousedown';
var _moveEvents = 'touchmove mousemove';
var _releaseEvents = 'touchend mouseup';
var _dragHandle;
// to identify the element in order to prevent getting superflous events when a single element has both drag and drop directives on it.
var _myid = scope.$id;
var _data = null;
var _dragOffset = null;
var _dragEnabled = false;
var _pressTimer = null;
var onDragStartCallback = $parse(attrs.ngDragStart) || null;
var onDragStopCallback = $parse(attrs.ngDragStop) || null;
var onDragSuccessCallback = $parse(attrs.ngDragSuccess) || null;
var allowTransform = angular.isDefined(attrs.allowTransform) ? scope.$eval(attrs.allowTransform) : true;
var getDragData = $parse(attrs.ngDragData);
// deregistration function for mouse move events in $rootScope triggered by jqLite trigger handler
var _deregisterRootMoveListener = angular.noop;
var initialize = function () {
element.attr('draggable','false'); // prevent native drag
// check to see if drag handle(s) was specified
// if querySelectorAll is available,we use this instead of find
// as JQLite find is limited to tagnames
if (element[0].querySelectorAll) {
var dragHandles = angular.element(element[0].querySelectorAll('[ng-drag-handle]'));
} else {
var dragHandles = element.find('[ng-drag-handle]');
}
if (dragHandles.length) {
_dragHandle = dragHandles;
}
toggleListeners(true);
};
var toggleListeners = function (enable) {
if (!enable)return;
// add listeners.
scope.$on('$destroy',onDestroy);
scope.$watch(attrs.ngDrag,onEnableChange);
scope.$watch(attrs.ngCenterAnchor,onCenterAnchor);
// wire up touch events
if (_dragHandle) {
// handle(s) specified,use those to initiate drag
_dragHandle.on(_pressEvents,onpress);
} else {
// no handle(s) specified,use the element as the handle
element.on(_pressEvents,onpress);
}
if(! _hasTouch && element[0].nodeName.toLowerCase() == "img"){
element.on('mousedown',function(){ return false;}); // prevent native drag for images
}
};
var onDestroy = function (enable) {
toggleListeners(false);
};
var onEnableChange = function (newVal,oldVal) {
_dragEnabled = (newVal);
};
var onCenterAnchor = function (newVal,oldVal) {
if(angular.isDefined(newVal))
_centerAnchor = (newVal || 'true');
};
var isClickableElement = function (evt) {
return (
angular.isDefined(angular.element(evt.target).attr("ng-cancel-drag"))
);
};
/*
* When the element is clicked start the drag behaviour
* On touch devices as a small delay so as not to prevent native window scrolling
*/
var onpress = function(evt) {
if(! _dragEnabled)return;
if (isClickableElement(evt)) {
return;
}
if (evt.type == "mousedown" && evt.button != 0) {
// Do not start dragging on right-click
return;
}
if(_hasTouch){
cancelPress();
_pressTimer = setTimeout(function(){
cancelPress();
onlongpress(evt);
},100);
$document.on(_moveEvents,cancelPress);
$document.on(_releaseEvents,cancelPress);
}else{
onlongpress(evt);
}
};
var cancelPress = function() {
clearTimeout(_pressTimer);
$document.off(_moveEvents,cancelPress);
$document.off(_releaseEvents,cancelPress);
};
var onlongpress = function(evt) {
if(! _dragEnabled)return;
evt.preventDefault();
offset = element[0].getBoundingClientRect();
if(allowTransform)
_dragOffset = offset;
else{
_dragOffset = {left:document.body.scrollLeft,top:document.body.scrollTop};
}
element.centerX = element[0].offsetWidth / 2;
element.centerY = element[0].offsetHeight / 2;
_mx = ngDraggable.inputEvent(evt).pageX;//ngDraggable.getEventProp(evt,'pageX');
_my = ngDraggable.inputEvent(evt).pageY;//ngDraggable.getEventProp(evt,'pageY');
_mrx = _mx - offset.left;
_mry = _my - offset.top;
if (_centerAnchor) {
_tx = _mx - element.centerX - $window.pageXOffset;
_ty = _my - element.centerY - $window.pageYOffset;
} else {
_tx = _mx - _mrx - $window.pageXOffset;
_ty = _my - _mry - $window.pageYOffset;
}
$document.on(_moveEvents,onmove);
$document.on(_releaseEvents,onrelease);
// This event is used to receive manually triggered mouse move events
// jqLite unfortunately only supports triggerHandler(...)
// See http://api.jquery.com/triggerHandler/
// _deregisterRootMoveListener = $rootScope.$on('draggable:_triggerHandlerMove',onmove);
_deregisterRootMoveListener = $rootScope.$on('draggable:_triggerHandlerMove',function(event,origEvent) {
onmove(origEvent);
});
};
var onmove = function (evt) {
if (!_dragEnabled)return;
evt.preventDefault();
if (!element.hasClass('dragging')) {
_data = getDragData(scope);
element.addClass('dragging');
$rootScope.$broadcast('draggable:start',{x:_mx,y:_my,tx:_tx,ty:_ty,event:evt,element:element,data:_data});
if (onDragStartCallback ){
scope.$apply(function () {
onDragStartCallback(scope,{$data: _data,$event: evt});
});
}
}
_mx = ngDraggable.inputEvent(evt).pageX;//ngDraggable.getEventProp(evt,'pageY');
if (_centerAnchor) {
_tx = _mx - element.centerX - _dragOffset.left;
_ty = _my - element.centerY - _dragOffset.top;
} else {
_tx = _mx - _mrx - _dragOffset.left;
_ty = _my - _mry - _dragOffset.top;
}
moveElement(_tx,_ty);
$rootScope.$broadcast('draggable:move',{ x: _mx,y: _my,tx: _tx,ty: _ty,event: evt,element: element,data: _data,uid: _myid,dragOffset: _dragOffset });
};
var onrelease = function(evt) {
if (!_dragEnabled)
return;
evt.preventDefault();
$rootScope.$broadcast('draggable:end',data:_data,callback:onDragComplete,uid: _myid});
element.removeClass('dragging');
element.parent().find('.drag-enter').removeClass('drag-enter');
reset();
$document.off(_moveEvents,onmove);
$document.off(_releaseEvents,onrelease);
if (onDragStopCallback ){
scope.$apply(function () {
onDragStopCallback(scope,$event: evt});
});
}
_deregisterRootMoveListener();
};
var onDragComplete = function(evt) {
if (!onDragSuccessCallback )return;
scope.$apply(function () {
onDragSuccessCallback(scope,$event: evt});
});
};
var reset = function() {
if(allowTransform)
element.css({transform:'','z-index':'','-webkit-transform':'','-ms-transform':''});
else
element.css({'position':'',top:'',left:''});
};
var moveElement = function (x,y) {
if(allowTransform) {
element.css({
transform: 'matrix3d(1,1,' + x + ',' + y + ',1)','z-index': 99999,'-webkit-transform': 'matrix3d(1,'-ms-transform': 'matrix(1,' + y + ')'
});
}else{
element.css({'left':x+'px','top':y+'px','position':'fixed'});
}
};
initialize();
}
};}])
.directive('ngDrop',['$parse','$timeout',function ($parse,$timeout,attrs) {
scope.value = attrs.ngDrop;
scope.isTouching = false;
var _lastDropTouch=null;
var _myid = scope.$id;
var _dropEnabled=false;
var onDropCallback = $parse(attrs.ngDropSuccess);// || function(){};
var onDragStartCallback = $parse(attrs.ngDragStart);
var onDragStopCallback = $parse(attrs.ngDragStop);
var onDragMoveCallback = $parse(attrs.ngDragMove);
var initialize = function () {
toggleListeners(true);
};
var toggleListeners = function (enable) {
// remove listeners
if (!enable)return;
// add listeners.
scope.$watch(attrs.ngDrop,onEnableChange);
scope.$on('$destroy',onDestroy);
scope.$on('draggable:start',onDragStart);
scope.$on('draggable:move',onDragMove);
scope.$on('draggable:end',onDragEnd);
};
var onDestroy = function (enable) {
toggleListeners(false);
};
var onEnableChange = function (newVal,oldVal) {
_dropEnabled=newVal;
};
var onDragStart = function(evt,obj) {
if(! _dropEnabled)return;
isTouching(obj.x,obj.y,obj.element);
if (attrs.ngDragStart) {
$timeout(function(){
onDragStartCallback(scope,{$data: obj.data,$event: obj});
});
}
};
var onDragMove = function(evt,obj.element);
if (attrs.ngDragMove) {
$timeout(function(){
onDragMoveCallback(scope,$event: obj});
});
}
};
var onDragEnd = function (evt,obj) {
// don't listen to drop events if this is the element being dragged
// only update the styles and return
if (!_dropEnabled || _myid === obj.uid) {
updateDragStyles(false,obj.element);
return;
}
if (isTouching(obj.x,obj.element)) {
// call the ngDraggable ngDragSuccess element callback
if(obj.callback){
obj.callback(obj);
}
if (attrs.ngDropSuccess) {
$timeout(function(){
onDropCallback(scope,$event: obj,$target: scope.$eval(scope.value)});
});
}
}
if (attrs.ngDragStop) {
$timeout(function(){
onDragStopCallback(scope,$event: obj});
});
}
updateDragStyles(false,obj.element);
};
var isTouching = function(mouseX,mouseY,dragElement) {
var touching= hitTest(mouseX,mouseY);
scope.isTouching = touching;
if(touching){
_lastDropTouch = element;
}
updateDragStyles(touching,dragElement);
return touching;
};
var updateDragStyles = function(touching,dragElement) {
if(touching){
element.addClass('drag-enter');
dragElement.addClass('drag-over');
}else if(_lastDropTouch == element){
_lastDropTouch=null;
element.removeClass('drag-enter');
dragElement.removeClass('drag-over');
}
};
var hitTest = function(x,y) {
var bounds = element[0].getBoundingClientRect();// ngDraggable.getPrivOffset(element);
x -= $document[0].body.scrollLeft + $document[0].documentElement.scrollLeft;
y -= $document[0].body.scrollTop + $document[0].documentElement.scrollTop;
return x >= bounds.left
&& x <= bounds.right
&& y <= bounds.bottom
&& y >= bounds.top;
};
initialize();
}
};}])
.directive('ngDragClone',attrs) {
var img,_allowClone=true;
var _dragOffset = null;
scope.clonedData = {};
var initialize = function () {
img = element.find('img');
element.attr('draggable','false');
img.attr('draggable','false');
reset();
toggleListeners(true);
};
var toggleListeners = function (enable) {
// remove listeners
if (!enable)return;
// add listeners.
scope.$on('draggable:start',onDragEnd);
preventContextMenu();
};
var preventContextMenu = function() {
// element.off('mousedown touchstart touchmove touchend touchcancel',absorbEvent_);
img.off('mousedown touchstart touchmove touchend touchcancel',absorbEvent_);
// element.on('mousedown touchstart touchmove touchend touchcancel',absorbEvent_);
img.on('mousedown touchstart touchmove touchend touchcancel',absorbEvent_);
};
var onDragStart = function(evt,obj,elm) {
_allowClone=true;
if(angular.isDefined(obj.data.allowClone)){
_allowClone=obj.data.allowClone;
}
if(_allowClone) {
scope.$apply(function () {
scope.clonedData = obj.data;
});
element.css('width',obj.element[0].offsetWidth);
element.css('height',obj.element[0].offsetHeight);
moveElement(obj.tx,obj.ty);
}
};
var onDragMove = function(evt,obj) {
if(_allowClone) {
_tx = obj.tx + obj.dragOffset.left;
_ty = obj.ty + obj.dragOffset.top;
moveElement(_tx,_ty);
}
};
var onDragEnd = function(evt,obj) {
//moveElement(obj.tx,obj.ty);
if(_allowClone) {
reset();
}
};
var reset = function() {
element.css({left:0,top:0,position:'fixed','z-index':-1,visibility:'hidden'});
};
var moveElement = function(x,y) {
element.css({
transform: 'matrix3d(1,'+x+','+y+','visibility': 'visible','+y+')'
//,margin: '0' don't monkey with the margin,});
};
var absorbEvent_ = function (event) {
var e = event;//.originalEvent;
e.preventDefault && e.preventDefault();
e.stopPropagation && e.stopPropagation();
e.cancelBubble = true;
e.returnValue = false;
return false;
};
initialize();
}
};}])
.directive('ngPreventDrag',$timeout) {
return {
restrict: 'A',attrs) {
var initialize = function () {
element.attr('draggable','false');
toggleListeners(true);
};
var toggleListeners = function (enable) {
// remove listeners
if (!enable)return;
// add listeners.
element.on('mousedown touchstart touchmove touchend touchcancel',absorbEvent_);
};
var absorbEvent_ = function (event) {
var e = event.originalEvent;
e.preventDefault && e.preventDefault();
e.stopPropagation && e.stopPropagation();
e.cancelBubble = true;
e.returnValue = false;
return false;
};
initialize();
}
};}])
.directive('ngCancelDrag',[function () {
return {
restrict: 'A',attrs) {
element.find('*').attr('ng-cancel-drag','ng-cancel-drag');
}
};
}])
.directive('ngDragScroll',['$window','$interval','$rootScope',function($window,$interval,$rootScope) {
return {
restrict: 'A',link: function(scope,attrs) {
var intervalPromise = null;
var lastMouseEvent = null;
var config = {
verticalScroll: attrs.verticalScroll || true,horizontalScroll: attrs.horizontalScroll || true,activationDistance: attrs.activationDistance || 75,scrollDistance: attrs.scrollDistance || 15
};
var reqAnimFrame = (function() {
return window.requestAnimationFrame ||
window.webkitRequestAnimationFrame ||
window.mozRequestAnimationFrame ||
window.oRequestAnimationFrame ||
window.msRequestAnimationFrame ||
function( /* function FrameRequestCallback */ callback,/* DOMElement Element */ element ) {
window.setTimeout(callback,1000 / 60);
};
})();
var animationIsOn = false;
var createInterval = function() {
animationIsOn = true;
function nextFrame(callback) {
var args = Array.prototype.slice.call(arguments);
if(animationIsOn) {
reqAnimFrame(function () {
$rootScope.$apply(function () {
callback.apply(null,args);
nextFrame(callback);
});
})
}
}
nextFrame(function() {
if (!lastMouseEvent) return;
var viewportWidth = Math.max(document.documentElement.clientWidth,window.innerWidth || 0);
var viewportHeight = Math.max(document.documentElement.clientHeight,window.innerHeight || 0);
var scrollX = 0;
var scrollY = 0;
if (config.horizontalScroll) {
// If horizontal scrolling is active.
if (lastMouseEvent.clientX < config.activationDistance) {
// If the mouse is on the left of the viewport within the activation distance.
scrollX = -config.scrollDistance;
}
else if (lastMouseEvent.clientX > viewportWidth - config.activationDistance) {
// If the mouse is on the right of the viewport within the activation distance.
scrollX = config.scrollDistance;
}
}
if (config.verticalScroll) {
// If vertical scrolling is active.
if (lastMouseEvent.clientY < config.activationDistance) {
// If the mouse is on the top of the viewport within the activation distance.
scrollY = -config.scrollDistance;
}
else if (lastMouseEvent.clientY > viewportHeight - config.activationDistance) {
// If the mouse is on the bottom of the viewport within the activation distance.
scrollY = config.scrollDistance;
}
}
if (scrollX !== 0 || scrollY !== 0) {
// Record the current scroll position.
var currentScrollLeft = ($window.pageXOffset || $document[0].documentElement.scrollLeft);
var currentScrollTop = ($window.pageYOffset || $document[0].documentElement.scrollTop);
// Remove the transformation from the element,scroll the window by the scroll distance
// record how far we scrolled,then reapply the element transformation.
var elementTransform = element.css('transform');
element.css('transform','initial');
$window.scrollBy(scrollX,scrollY);
var horizontalScrollAmount = ($window.pageXOffset || $document[0].documentElement.scrollLeft) - currentScrollLeft;
var verticalScrollAmount = ($window.pageYOffset || $document[0].documentElement.scrollTop) - currentScrollTop;
element.css('transform',elementTransform);
lastMouseEvent.pageX += horizontalScrollAmount;
lastMouseEvent.pageY += verticalScrollAmount;
$rootScope.$emit('draggable:_triggerHandlerMove',lastMouseEvent);
}
});
};
var clearInterval = function() {
animationIsOn = false;
};
scope.$on('draggable:start',obj) {
// Ignore this event if it's not for this element.
if (obj.element[0] !== element[0]) return;
if (!animationIsOn) createInterval();
});
scope.$on('draggable:end',obj) {
// Ignore this event if it's not for this element.
if (obj.element[0] !== element[0]) return;
if (animationIsOn) clearInterval();
});
scope.$on('draggable:move',obj) {
// Ignore this event if it's not for this element.
if (obj.element[0] !== element[0]) return;
lastMouseEvent = obj.event;
});
}
};}]);
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持编程之家。
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