60 lines
1.8 KiB
JavaScript
60 lines
1.8 KiB
JavaScript
//>>built
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define("dojox/layout/DragPane", ["dojo/_base/declare", "dijit/_Widget", "dojo/_base/html", "dojo/dom-style"],
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function(declare, Widget, htmlUtil, domStyle){
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/*===== var Widget = dijit._Widget; =====*/
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return declare("dojox.layout.DragPane", Widget, {
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// summary: Makes a pane's content dragable by/within it's surface
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//
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// description:
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// A small widget which takes a node with overflow:auto and
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// allows dragging to position the content. Useful with images,
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// or for just adding "something" to a overflow-able div.
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//
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// invert: Boolean
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// Naturally, the behavior is to invert the axis of the drag.
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// Setting invert:false will make the pane drag in the same
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// direction as the mouse.
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invert: true,
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postCreate: function(){
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this.connect(this.domNode, "onmousedown", "_down");
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this.connect(this.domNode, "onmouseleave", "_up");
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this.connect(this.domNode, "onmouseup", "_up");
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},
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_down: function(e){
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// summary: mousedown handler, start the dragging
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var t = this.domNode;
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e.preventDefault();
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domStyle.set(t, "cursor", "move");
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this._x = e.pageX;
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this._y = e.pageY;
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if ((this._x < t.offsetLeft + t.clientWidth) &&
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(this._y < t.offsetTop + t.clientHeight)) {
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htmlUtil.setSelectable(t,false);
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this._mover = this.connect(t, "onmousemove", "_move");
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}
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},
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_up: function(e){
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// summary: mouseup handler, stop the dragging
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htmlUtil.setSelectable(this.domNode,true);
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domStyle.set(this.domNode, "cursor", "pointer");
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this._mover && this.disconnect(this._mover);
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delete this._mover;
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},
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_move: function(e){
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// summary: mousemove listener, offset the scroll amount by the delta
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// since our last call.
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var mod = this.invert ? 1 : -1;
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this.domNode.scrollTop += (this._y - e.pageY) * mod;
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this.domNode.scrollLeft += (this._x - e.pageX) * mod;
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this._x = e.pageX;
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this._y = e.pageY;
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}
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});
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}); |