Struts example source code file (SplitContainer.js)

This example Struts source code file (SplitContainer.js) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

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The Struts SplitContainer.js source code

/*
	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.widget.SplitContainer");
dojo.require("dojo.widget.*");
dojo.require("dojo.widget.ContentPane");
dojo.require("dojo.widget.HtmlWidget");
dojo.require("dojo.html.style");
dojo.require("dojo.html.layout");
dojo.require("dojo.html.selection");
dojo.require("dojo.io.cookie");
dojo.widget.defineWidget("dojo.widget.SplitContainer", dojo.widget.HtmlWidget, function () {
	this.sizers = [];
}, {isContainer:true, templateCssString:".dojoSplitContainer{\n\tposition: relative;\n\toverflow: hidden;\n\tdisplay: block;\n}\n\n.dojoSplitPane{\n\tposition: absolute;\n}\n\n.dojoSplitContainerSizerH,\n.dojoSplitContainerSizerV {\n\tfont-size: 1px;\n\tcursor: move;\n\tcursor: w-resize;\n\tbackground-color: ThreeDFace;\n\tborder: 1px solid;\n\tborder-color: ThreeDHighlight ThreeDShadow ThreeDShadow ThreeDHighlight;\n\tmargin: 0;\n}\n\n.dojoSplitContainerSizerV {\n\tcursor: n-resize;\n}\n\n.dojoSplitContainerVirtualSizerH,\n.dojoSplitContainerVirtualSizerV {\n\tfont-size: 1px;\n\tcursor: move;\n\tcursor: w-resize;\n\tbackground-color: ThreeDShadow;\n\t-moz-opacity: 0.5;\n\topacity: 0.5;\n\tfilter: Alpha(Opacity=50);\n\tmargin: 0;\n}\n\n.dojoSplitContainerVirtualSizerV {\n\tcursor: n-resize;\n}\n", templateCssPath:dojo.uri.moduleUri("dojo.widget", "templates/SplitContainer.css"), activeSizing:false, sizerWidth:15, orientation:"horizontal", persist:true, postMixInProperties:function () {
	dojo.widget.SplitContainer.superclass.postMixInProperties.apply(this, arguments);
	this.isHorizontal = (this.orientation == "horizontal");
}, fillInTemplate:function () {
	dojo.widget.SplitContainer.superclass.fillInTemplate.apply(this, arguments);
	dojo.html.addClass(this.domNode, "dojoSplitContainer");
	if (dojo.render.html.moz) {
		this.domNode.style.overflow = "-moz-scrollbars-none";
	}
	var content = dojo.html.getContentBox(this.domNode);
	this.paneWidth = content.width;
	this.paneHeight = content.height;
}, onResized:function (e) {
	var content = dojo.html.getContentBox(this.domNode);
	this.paneWidth = content.width;
	this.paneHeight = content.height;
	this._layoutPanels();
}, postCreate:function (args, fragment, parentComp) {
	dojo.widget.SplitContainer.superclass.postCreate.apply(this, arguments);
	for (var i = 0; i < this.children.length; i++) {
		with (this.children[i].domNode.style) {
			position = "absolute";
		}
		dojo.html.addClass(this.children[i].domNode, "dojoSplitPane");
		if (i == this.children.length - 1) {
			break;
		}
		this._addSizer();
	}
	if (typeof this.sizerWidth == "object") {
		try {
			this.sizerWidth = parseInt(this.sizerWidth.toString());
		}
		catch (e) {
			this.sizerWidth = 15;
		}
	}
	this.virtualSizer = document.createElement("div");
	this.virtualSizer.style.position = "absolute";
	this.virtualSizer.style.display = "none";
	this.virtualSizer.style.zIndex = 10;
	this.virtualSizer.className = this.isHorizontal ? "dojoSplitContainerVirtualSizerH" : "dojoSplitContainerVirtualSizerV";
	this.domNode.appendChild(this.virtualSizer);
	dojo.html.disableSelection(this.virtualSizer);
	if (this.persist) {
		this._restoreState();
	}
	this.resizeSoon();
}, _injectChild:function (child) {
	with (child.domNode.style) {
		position = "absolute";
	}
	dojo.html.addClass(child.domNode, "dojoSplitPane");
}, _addSizer:function () {
	var i = this.sizers.length;
	this.sizers[i] = document.createElement("div");
	this.sizers[i].style.position = "absolute";
	this.sizers[i].className = this.isHorizontal ? "dojoSplitContainerSizerH" : "dojoSplitContainerSizerV";
	var self = this;
	var handler = (function () {
		var sizer_i = i;
		return function (e) {
			self.beginSizing(e, sizer_i);
		};
	})();
	dojo.event.connect(this.sizers[i], "onmousedown", handler);
	this.domNode.appendChild(this.sizers[i]);
	dojo.html.disableSelection(this.sizers[i]);
}, removeChild:function (widget) {
	if (this.sizers.length > 0) {
		for (var x = 0; x < this.children.length; x++) {
			if (this.children[x] === widget) {
				var i = this.sizers.length - 1;
				this.domNode.removeChild(this.sizers[i]);
				this.sizers.length = i;
				break;
			}
		}
	}
	dojo.widget.SplitContainer.superclass.removeChild.call(this, widget, arguments);
	this.onResized();
}, addChild:function (widget) {
	dojo.widget.SplitContainer.superclass.addChild.apply(this, arguments);
	this._injectChild(widget);
	if (this.children.length > 1) {
		this._addSizer();
	}
	this._layoutPanels();
}, _layoutPanels:function () {
	if (this.children.length == 0) {
		return;
	}
	var space = this.isHorizontal ? this.paneWidth : this.paneHeight;
	if (this.children.length > 1) {
		space -= this.sizerWidth * (this.children.length - 1);
	}
	var out_of = 0;
	for (var i = 0; i < this.children.length; i++) {
		out_of += this.children[i].sizeShare;
	}
	var pix_per_unit = space / out_of;
	var total_size = 0;
	for (var i = 0; i < this.children.length - 1; i++) {
		var size = Math.round(pix_per_unit * this.children[i].sizeShare);
		this.children[i].sizeActual = size;
		total_size += size;
	}
	this.children[this.children.length - 1].sizeActual = space - total_size;
	this._checkSizes();
	var pos = 0;
	var size = this.children[0].sizeActual;
	this._movePanel(this.children[0], pos, size);
	this.children[0].position = pos;
	pos += size;
	for (var i = 1; i < this.children.length; i++) {
		this._moveSlider(this.sizers[i - 1], pos, this.sizerWidth);
		this.sizers[i - 1].position = pos;
		pos += this.sizerWidth;
		size = this.children[i].sizeActual;
		this._movePanel(this.children[i], pos, size);
		this.children[i].position = pos;
		pos += size;
	}
}, _movePanel:function (panel, pos, size) {
	if (this.isHorizontal) {
		panel.domNode.style.left = pos + "px";
		panel.domNode.style.top = 0;
		panel.resizeTo(size, this.paneHeight);
	} else {
		panel.domNode.style.left = 0;
		panel.domNode.style.top = pos + "px";
		panel.resizeTo(this.paneWidth, size);
	}
}, _moveSlider:function (slider, pos, size) {
	if (this.isHorizontal) {
		slider.style.left = pos + "px";
		slider.style.top = 0;
		dojo.html.setMarginBox(slider, {width:size, height:this.paneHeight});
	} else {
		slider.style.left = 0;
		slider.style.top = pos + "px";
		dojo.html.setMarginBox(slider, {width:this.paneWidth, height:size});
	}
}, _growPane:function (growth, pane) {
	if (growth > 0) {
		if (pane.sizeActual > pane.sizeMin) {
			if ((pane.sizeActual - pane.sizeMin) > growth) {
				pane.sizeActual = pane.sizeActual - growth;
				growth = 0;
			} else {
				growth -= pane.sizeActual - pane.sizeMin;
				pane.sizeActual = pane.sizeMin;
			}
		}
	}
	return growth;
}, _checkSizes:function () {
	var total_min_size = 0;
	var total_size = 0;
	for (var i = 0; i < this.children.length; i++) {
		total_size += this.children[i].sizeActual;
		total_min_size += this.children[i].sizeMin;
	}
	if (total_min_size <= total_size) {
		var growth = 0;
		for (var i = 0; i < this.children.length; i++) {
			if (this.children[i].sizeActual < this.children[i].sizeMin) {
				growth += this.children[i].sizeMin - this.children[i].sizeActual;
				this.children[i].sizeActual = this.children[i].sizeMin;
			}
		}
		if (growth > 0) {
			if (this.isDraggingLeft) {
				for (var i = this.children.length - 1; i >= 0; i--) {
					growth = this._growPane(growth, this.children[i]);
				}
			} else {
				for (var i = 0; i < this.children.length; i++) {
					growth = this._growPane(growth, this.children[i]);
				}
			}
		}
	} else {
		for (var i = 0; i < this.children.length; i++) {
			this.children[i].sizeActual = Math.round(total_size * (this.children[i].sizeMin / total_min_size));
		}
	}
}, beginSizing:function (e, i) {
	this.paneBefore = this.children[i];
	this.paneAfter = this.children[i + 1];
	this.isSizing = true;
	this.sizingSplitter = this.sizers[i];
	this.originPos = dojo.html.getAbsolutePosition(this.children[0].domNode, true, dojo.html.boxSizing.MARGIN_BOX);
	if (this.isHorizontal) {
		var client = (e.layerX ? e.layerX : e.offsetX);
		var screen = e.pageX;
		this.originPos = this.originPos.x;
	} else {
		var client = (e.layerY ? e.layerY : e.offsetY);
		var screen = e.pageY;
		this.originPos = this.originPos.y;
	}
	this.startPoint = this.lastPoint = screen;
	this.screenToClientOffset = screen - client;
	this.dragOffset = this.lastPoint - this.paneBefore.sizeActual - this.originPos - this.paneBefore.position;
	if (!this.activeSizing) {
		this._showSizingLine();
	}
	dojo.event.connect(document.documentElement, "onmousemove", this, "changeSizing");
	dojo.event.connect(document.documentElement, "onmouseup", this, "endSizing");
	dojo.event.browser.stopEvent(e);
}, changeSizing:function (e) {
	this.lastPoint = this.isHorizontal ? e.pageX : e.pageY;
	if (this.activeSizing) {
		this.movePoint();
		this._updateSize();
	} else {
		this.movePoint();
		this._moveSizingLine();
	}
	dojo.event.browser.stopEvent(e);
}, endSizing:function (e) {
	if (!this.activeSizing) {
		this._hideSizingLine();
	}
	this._updateSize();
	this.isSizing = false;
	dojo.event.disconnect(document.documentElement, "onmousemove", this, "changeSizing");
	dojo.event.disconnect(document.documentElement, "onmouseup", this, "endSizing");
	if (this.persist) {
		this._saveState(this);
	}
}, movePoint:function () {
	var p = this.lastPoint - this.screenToClientOffset;
	var a = p - this.dragOffset;
	a = this.legaliseSplitPoint(a);
	p = a + this.dragOffset;
	this.lastPoint = p + this.screenToClientOffset;
}, legaliseSplitPoint:function (a) {
	a += this.sizingSplitter.position;
	this.isDraggingLeft = (a > 0) ? true : false;
	if (!this.activeSizing) {
		if (a < this.paneBefore.position + this.paneBefore.sizeMin) {
			a = this.paneBefore.position + this.paneBefore.sizeMin;
		}
		if (a > this.paneAfter.position + (this.paneAfter.sizeActual - (this.sizerWidth + this.paneAfter.sizeMin))) {
			a = this.paneAfter.position + (this.paneAfter.sizeActual - (this.sizerWidth + this.paneAfter.sizeMin));
		}
	}
	a -= this.sizingSplitter.position;
	this._checkSizes();
	return a;
}, _updateSize:function () {
	var pos = this.lastPoint - this.dragOffset - this.originPos;
	var start_region = this.paneBefore.position;
	var end_region = this.paneAfter.position + this.paneAfter.sizeActual;
	this.paneBefore.sizeActual = pos - start_region;
	this.paneAfter.position = pos + this.sizerWidth;
	this.paneAfter.sizeActual = end_region - this.paneAfter.position;
	for (var i = 0; i < this.children.length; i++) {
		this.children[i].sizeShare = this.children[i].sizeActual;
	}
	this._layoutPanels();
}, _showSizingLine:function () {
	this._moveSizingLine();
	if (this.isHorizontal) {
		dojo.html.setMarginBox(this.virtualSizer, {width:this.sizerWidth, height:this.paneHeight});
	} else {
		dojo.html.setMarginBox(this.virtualSizer, {width:this.paneWidth, height:this.sizerWidth});
	}
	this.virtualSizer.style.display = "block";
}, _hideSizingLine:function () {
	this.virtualSizer.style.display = "none";
}, _moveSizingLine:function () {
	var pos = this.lastPoint - this.startPoint + this.sizingSplitter.position;
	if (this.isHorizontal) {
		this.virtualSizer.style.left = pos + "px";
	} else {
		var pos = (this.lastPoint - this.startPoint) + this.sizingSplitter.position;
		this.virtualSizer.style.top = pos + "px";
	}
}, _getCookieName:function (i) {
	return this.widgetId + "_" + i;
}, _restoreState:function () {
	for (var i = 0; i < this.children.length; i++) {
		var cookieName = this._getCookieName(i);
		var cookieValue = dojo.io.cookie.getCookie(cookieName);
		if (cookieValue != null) {
			var pos = parseInt(cookieValue);
			if (typeof pos == "number") {
				this.children[i].sizeShare = pos;
			}
		}
	}
}, _saveState:function () {
	for (var i = 0; i < this.children.length; i++) {
		var cookieName = this._getCookieName(i);
		dojo.io.cookie.setCookie(cookieName, this.children[i].sizeShare, null, null, null, null);
	}
}});
dojo.lang.extend(dojo.widget.Widget, {sizeMin:10, sizeShare:10});
dojo.widget.defineWidget("dojo.widget.SplitContainerPanel", dojo.widget.ContentPane, {});