62 lines
1.6 KiB
JavaScript
62 lines
1.6 KiB
JavaScript
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dojo.provide("dojox.layout.DragPane");
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dojo.require("dijit._Widget");
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dojo.declare("dojox.layout.DragPane",
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dijit._Widget, {
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//
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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.inherited(arguments);
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this.connect(this.domNode,"onmousedown","_down");
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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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dojo.style(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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dojo.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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dojo.setSelectable(this.domNode,true);
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dojo.style(this.domNode,"cursor","pointer");
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this.disconnect(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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