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