HtmlDragManager.js
资源名称:oa.rar [点击查看]
上传用户:kimgenplus
上传日期:2016-06-05
资源大小:20877k
文件大小:9k
源码类别:
OA系统
开发平台:
Java
- /*
- Copyright (c) 2004-2006, The Dojo Foundation
- All Rights Reserved.
- Licensed under the Academic Free License version 2.1 or above OR the
- modified BSD license. For more information on Dojo licensing, see:
- http://dojotoolkit.org/community/licensing.shtml
- */
- dojo.provide("dojo.dnd.HtmlDragManager");
- dojo.require("dojo.dnd.DragAndDrop");
- dojo.require("dojo.event.*");
- dojo.require("dojo.lang.array");
- dojo.require("dojo.html.common");
- dojo.require("dojo.html.layout");
- dojo.declare("dojo.dnd.HtmlDragManager", dojo.dnd.DragManager, {disabled:false, nestedTargets:false, mouseDownTimer:null, dsCounter:0, dsPrefix:"dojoDragSource", dropTargetDimensions:[], currentDropTarget:null, previousDropTarget:null, _dragTriggered:false, selectedSources:[], dragObjects:[], dragSources:[], dropTargets:[], currentX:null, currentY:null, lastX:null, lastY:null, mouseDownX:null, mouseDownY:null, threshold:7, dropAcceptable:false, cancelEvent:function (e) {
- e.stopPropagation();
- e.preventDefault();
- }, registerDragSource:function (ds) {
- if (ds["domNode"]) {
- var dp = this.dsPrefix;
- var dpIdx = dp + "Idx_" + (this.dsCounter++);
- ds.dragSourceId = dpIdx;
- this.dragSources[dpIdx] = ds;
- ds.domNode.setAttribute(dp, dpIdx);
- if (dojo.render.html.ie) {
- dojo.event.browser.addListener(ds.domNode, "ondragstart", this.cancelEvent);
- }
- }
- }, unregisterDragSource:function (ds) {
- if (ds["domNode"]) {
- var dp = this.dsPrefix;
- var dpIdx = ds.dragSourceId;
- delete ds.dragSourceId;
- delete this.dragSources[dpIdx];
- ds.domNode.setAttribute(dp, null);
- if (dojo.render.html.ie) {
- dojo.event.browser.removeListener(ds.domNode, "ondragstart", this.cancelEvent);
- }
- }
- }, registerDropTarget:function (dt) {
- this.dropTargets.push(dt);
- }, unregisterDropTarget:function (dt) {
- var index = dojo.lang.find(this.dropTargets, dt, true);
- if (index >= 0) {
- this.dropTargets.splice(index, 1);
- }
- }, getDragSource:function (e) {
- var tn = e.target;
- if (tn === dojo.body()) {
- return;
- }
- var ta = dojo.html.getAttribute(tn, this.dsPrefix);
- while ((!ta) && (tn)) {
- tn = tn.parentNode;
- if ((!tn) || (tn === dojo.body())) {
- return;
- }
- ta = dojo.html.getAttribute(tn, this.dsPrefix);
- }
- return this.dragSources[ta];
- }, onKeyDown:function (e) {
- }, onMouseDown:function (e) {
- if (this.disabled) {
- return;
- }
- if (dojo.render.html.ie) {
- if (e.button != 1) {
- return;
- }
- } else {
- if (e.which != 1) {
- return;
- }
- }
- var target = e.target.nodeType == dojo.html.TEXT_NODE ? e.target.parentNode : e.target;
- if (dojo.html.isTag(target, "button", "textarea", "input", "select", "option")) {
- return;
- }
- var ds = this.getDragSource(e);
- if (!ds) {
- return;
- }
- if (!dojo.lang.inArray(this.selectedSources, ds)) {
- this.selectedSources.push(ds);
- ds.onSelected();
- }
- this.mouseDownX = e.pageX;
- this.mouseDownY = e.pageY;
- e.preventDefault();
- dojo.event.connect(document, "onmousemove", this, "onMouseMove");
- }, onMouseUp:function (e, cancel) {
- if (this.selectedSources.length == 0) {
- return;
- }
- this.mouseDownX = null;
- this.mouseDownY = null;
- this._dragTriggered = false;
- e.dragSource = this.dragSource;
- if ((!e.shiftKey) && (!e.ctrlKey)) {
- if (this.currentDropTarget) {
- this.currentDropTarget.onDropStart();
- }
- dojo.lang.forEach(this.dragObjects, function (tempDragObj) {
- var ret = null;
- if (!tempDragObj) {
- return;
- }
- if (this.currentDropTarget) {
- e.dragObject = tempDragObj;
- var ce = this.currentDropTarget.domNode.childNodes;
- if (ce.length > 0) {
- e.dropTarget = ce[0];
- while (e.dropTarget == tempDragObj.domNode) {
- e.dropTarget = e.dropTarget.nextSibling;
- }
- } else {
- e.dropTarget = this.currentDropTarget.domNode;
- }
- if (this.dropAcceptable) {
- ret = this.currentDropTarget.onDrop(e);
- } else {
- this.currentDropTarget.onDragOut(e);
- }
- }
- e.dragStatus = this.dropAcceptable && ret ? "dropSuccess" : "dropFailure";
- dojo.lang.delayThese([function () {
- try {
- tempDragObj.dragSource.onDragEnd(e);
- }
- catch (err) {
- var ecopy = {};
- for (var i in e) {
- if (i == "type") {
- ecopy.type = "mouseup";
- continue;
- }
- ecopy[i] = e[i];
- }
- tempDragObj.dragSource.onDragEnd(ecopy);
- }
- }, function () {
- tempDragObj.onDragEnd(e);
- }]);
- }, this);
- this.selectedSources = [];
- this.dragObjects = [];
- this.dragSource = null;
- if (this.currentDropTarget) {
- this.currentDropTarget.onDropEnd();
- }
- } else {
- }
- dojo.event.disconnect(document, "onmousemove", this, "onMouseMove");
- this.currentDropTarget = null;
- }, onScroll:function () {
- for (var i = 0; i < this.dragObjects.length; i++) {
- if (this.dragObjects[i].updateDragOffset) {
- this.dragObjects[i].updateDragOffset();
- }
- }
- if (this.dragObjects.length) {
- this.cacheTargetLocations();
- }
- }, _dragStartDistance:function (x, y) {
- if ((!this.mouseDownX) || (!this.mouseDownX)) {
- return;
- }
- var dx = Math.abs(x - this.mouseDownX);
- var dx2 = dx * dx;
- var dy = Math.abs(y - this.mouseDownY);
- var dy2 = dy * dy;
- return parseInt(Math.sqrt(dx2 + dy2), 10);
- }, cacheTargetLocations:function () {
- dojo.profile.start("cacheTargetLocations");
- this.dropTargetDimensions = [];
- dojo.lang.forEach(this.dropTargets, function (tempTarget) {
- var tn = tempTarget.domNode;
- if (!tn || !tempTarget.accepts([this.dragSource])) {
- return;
- }
- var abs = dojo.html.getAbsolutePosition(tn, true);
- var bb = dojo.html.getBorderBox(tn);
- this.dropTargetDimensions.push([[abs.x, abs.y], [abs.x + bb.width, abs.y + bb.height], tempTarget]);
- }, this);
- dojo.profile.end("cacheTargetLocations");
- }, onMouseMove:function (e) {
- if ((dojo.render.html.ie) && (e.button != 1)) {
- this.currentDropTarget = null;
- this.onMouseUp(e, true);
- return;
- }
- if ((this.selectedSources.length) && (!this.dragObjects.length)) {
- var dx;
- var dy;
- if (!this._dragTriggered) {
- this._dragTriggered = (this._dragStartDistance(e.pageX, e.pageY) > this.threshold);
- if (!this._dragTriggered) {
- return;
- }
- dx = e.pageX - this.mouseDownX;
- dy = e.pageY - this.mouseDownY;
- }
- this.dragSource = this.selectedSources[0];
- dojo.lang.forEach(this.selectedSources, function (tempSource) {
- if (!tempSource) {
- return;
- }
- var tdo = tempSource.onDragStart(e);
- if (tdo) {
- tdo.onDragStart(e);
- tdo.dragOffset.y += dy;
- tdo.dragOffset.x += dx;
- tdo.dragSource = tempSource;
- this.dragObjects.push(tdo);
- }
- }, this);
- this.previousDropTarget = null;
- this.cacheTargetLocations();
- }
- dojo.lang.forEach(this.dragObjects, function (dragObj) {
- if (dragObj) {
- dragObj.onDragMove(e);
- }
- });
- if (this.currentDropTarget) {
- var c = dojo.html.toCoordinateObject(this.currentDropTarget.domNode, true);
- var dtp = [[c.x, c.y], [c.x + c.width, c.y + c.height]];
- }
- if ((!this.nestedTargets) && (dtp) && (this.isInsideBox(e, dtp))) {
- if (this.dropAcceptable) {
- this.currentDropTarget.onDragMove(e, this.dragObjects);
- }
- } else {
- var bestBox = this.findBestTarget(e);
- if (bestBox.target === null) {
- if (this.currentDropTarget) {
- this.currentDropTarget.onDragOut(e);
- this.previousDropTarget = this.currentDropTarget;
- this.currentDropTarget = null;
- }
- this.dropAcceptable = false;
- return;
- }
- if (this.currentDropTarget !== bestBox.target) {
- if (this.currentDropTarget) {
- this.previousDropTarget = this.currentDropTarget;
- this.currentDropTarget.onDragOut(e);
- }
- this.currentDropTarget = bestBox.target;
- e.dragObjects = this.dragObjects;
- this.dropAcceptable = this.currentDropTarget.onDragOver(e);
- } else {
- if (this.dropAcceptable) {
- this.currentDropTarget.onDragMove(e, this.dragObjects);
- }
- }
- }
- }, findBestTarget:function (e) {
- var _this = this;
- var bestBox = new Object();
- bestBox.target = null;
- bestBox.points = null;
- dojo.lang.every(this.dropTargetDimensions, function (tmpDA) {
- if (!_this.isInsideBox(e, tmpDA)) {
- return true;
- }
- bestBox.target = tmpDA[2];
- bestBox.points = tmpDA;
- return Boolean(_this.nestedTargets);
- });
- return bestBox;
- }, isInsideBox:function (e, coords) {
- if ((e.pageX > coords[0][0]) && (e.pageX < coords[1][0]) && (e.pageY > coords[0][1]) && (e.pageY < coords[1][1])) {
- return true;
- }
- return false;
- }, onMouseOver:function (e) {
- }, onMouseOut:function (e) {
- }});
- dojo.dnd.dragManager = new dojo.dnd.HtmlDragManager();
- (function () {
- var d = document;
- var dm = dojo.dnd.dragManager;
- dojo.event.connect(d, "onkeydown", dm, "onKeyDown");
- dojo.event.connect(d, "onmouseover", dm, "onMouseOver");
- dojo.event.connect(d, "onmouseout", dm, "onMouseOut");
- dojo.event.connect(d, "onmousedown", dm, "onMouseDown");
- dojo.event.connect(d, "onmouseup", dm, "onMouseUp");
- dojo.event.connect(window, "onscroll", dm, "onScroll");
- })();