JavaScript + Ajax 実践サンプル集

ウィンドウ　ウィジェット

説明補足説明コードコメント投稿

このサンプルは、ウィンドウウィジェット用の関数を利用してポップアップウィンドウを操作します。ポップアップは、Web上からリンクをクリックして開いたり閉じることができます。ポップアップウィンドウにURLを指定して特定のWebサイトを表示させることができます。また、ポップアップウィンドウをリサイズしたりドラッグ＆ドロップすることもできます。

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メルマガ登録！ (ドラッグ＆リサイズ可)

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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>DHTML Window widget </title>
<style type="text/css">
.dhtmlwindow{
position: absolute;
border: 2px solid black;
visibility: hidden;
background-color: white;
}

.drag-handle{ /*CSS for Drag Handle*/
padding: 1px;
text-indent: 3px;
font: bold 14px Arial;
background-color: #CA0000;
color: white;
cursor: move;
overflow: hidden;
width: auto;
filter:progid:DXImageTransform.Microsoft.alpha(opacity=100);
-moz-opacity: 1;
opacity: 1;
}

.drag-handle .drag-controls{ /*CSS for controls (min, close etc) within Drag Handle*/
position: absolute;
right: 1px;
top: 2px;
cursor: hand;
cursor: pointer;
}

* html .drag-handle{ /*IE6 and below CSS hack. Width must be set to 100% in order for opaque title bar to render*/
width: 100%;
}

.drag-contentarea{ /*CSS for Content Display Area div*/
border-top: 1px solid brown;
background-color: white;
color: black;
height: 150px;
padding: 2px;
overflow: auto;
}

.drag-statusarea{ /*CSS for Status Bar div (includes resizearea)*/
border-top: 1px solid gray;
background-color: #F8F8F8;
height: 13px; /*height of resize image*/
}

.drag-resizearea{ /*CSS for Resize Area itself*/
float: right;
width: 13px; /*width of resize image*/
height: 13px; /*height of resize image*/
cursor: nw-resize;
font-size: 0;
}
</style>

var dhtmlwindow={
imagefiles:['images/widget/min.gif', 'images/widget/close.gif', 'images/widget/restore.gif', 'images/widget/resize.gif'], //Path to 4 images used by script, in that order
ajaxbustcache: true, //Bust caching when fetching a file via Ajax?
ajaxloadinghtml: '<b>Loading Page. Please wait...</b>', //HTML to show while window fetches Ajax Content?

minimizeorder: 0,
zIndexvalue:100,
tobjects: [], //object to contain references to dhtml window divs, for cleanup purposes
lastactivet: {}, //reference to last active DHTML window

init:function(t){
	var domwindow=document.createElement("div") //create dhtml window div
	domwindow.id=t
	domwindow.className="dhtmlwindow"
	var domwindowdata=''
	domwindowdata='<div class="drag-handle">'
	domwindowdata+='DHTML Window <div class="drag-controls"><img src="'+this.imagefiles[0]+'" title="Minimize" /><img src="'+this.imagefiles[1]+'" title="Close" /></div>'
	domwindowdata+='</div>'
	domwindowdata+='<div class="drag-contentarea"></div>'
	domwindowdata+='<div class="drag-statusarea"><div class="drag-resizearea" style="background: transparent url('+this.imagefiles[3]+') top right no-repeat;"> </div></div>'
	domwindowdata+='</div>'
	domwindow.innerHTML=domwindowdata
	document.getElementById("dhtmlwindowholder").appendChild(domwindow)
	//this.zIndexvalue=(this.zIndexvalue)? this.zIndexvalue+1 : 100 //z-index value for DHTML window: starts at 0, increments whenever a window has focus
	var t=document.getElementById(t)
	var divs=t.getElementsByTagName("div")
	for (var i=0; i<divs.length; i++){ //go through divs inside dhtml window and extract all those with class="drag-" prefix
		if (/drag-/.test(divs[i].className))
			t[divs[i].className.replace(/drag-/, "")]=divs[i] //take out the "drag-" prefix for shorter access by name
	}
	//t.style.zIndex=this.zIndexvalue //set z-index of this dhtml window
	t.handle._parent=t //store back reference to dhtml window
	t.resizearea._parent=t //same
	t.controls._parent=t //same
	t.onclose=function(){return true} //custom event handler "onclose"
	t.onmousedown=function(){dhtmlwindow.setfocus(this)} //Increase z-index of window when focus is on it
	t.handle.onmousedown=dhtmlwindow.setupdrag //set up drag behavior when mouse down on handle div
	t.resizearea.onmousedown=dhtmlwindow.setupdrag //set up drag behavior when mouse down on resize div
	t.controls.onclick=dhtmlwindow.enablecontrols
	t.show=function(){dhtmlwindow.show(this)} //public function for showing dhtml window
	t.hide=function(){dhtmlwindow.hide(this)} //public function for hiding dhtml window
	t.close=function(){dhtmlwindow.close(this)} //public function for closing dhtml window (also empties DHTML window content)
	t.setSize=function(w, h){dhtmlwindow.setSize(this, w, h)} //public function for setting window dimensions
	t.moveTo=function(x, y){dhtmlwindow.moveTo(this, x, y)} //public function for moving dhtml window (relative to viewpoint)
	t.isResize=function(bol){dhtmlwindow.isResize(this, bol)} //public function for specifying if window is resizable
	t.isScrolling=function(bol){dhtmlwindow.isScrolling(this, bol)} //public function for specifying if window content contains scrollbars
	t.load=function(contenttype, contentsource, title){dhtmlwindow.load(this, contenttype, contentsource, title)} //public function for loading content into window
	this.tobjects[this.tobjects.length]=t
	return t //return reference to dhtml window div
},

open:function(t, contenttype, contentsource, title, attr, recalonload){
	var d=dhtmlwindow //reference dhtml window object
	function getValue(Name){
		var config=new RegExp(Name+"=([^,]+)", "i") //get name/value config pair (ie: width=400px,)
		return (config.test(attr))? parseInt(RegExp.$1) : 0 //return value portion (int), or 0 (false) if none found
	}
	if (document.getElementById(t)==null) //if window doesn't exist yet, create it
		t=this.init(t) //return reference to dhtml window div
	else
		t=document.getElementById(t)
	this.setfocus(t)
	t.setSize(getValue(("width")), (getValue("height"))) //Set dimensions of window
	var xpos=getValue("center")? "middle" : getValue("left") //Get x coord of window
	var ypos=getValue("center")? "middle" : getValue("top") //Get y coord of window
	//t.moveTo(xpos, ypos) //Position window
	if (typeof recalonload!="undefined" && recalonload=="recal" && this.scroll_top==0){ //reposition window when page fully loads with updated window viewpoints?
		if (window.attachEvent && !window.opera) //In IE, add another 400 milisecs on page load (viewpoint properties may return 0 b4 then)
			this.addEvent(window, function(){setTimeout(function(){t.moveTo(xpos, ypos)}, 400)}, "load")
		else
			this.addEvent(window, function(){t.moveTo(xpos, ypos)}, "load")
	}
	t.isResize(getValue("resize")) //Set whether window is resizable
	t.isScrolling(getValue("scrolling")) //Set whether window should contain scrollbars
	t.style.visibility="visible"
	t.style.display="block"
	t.contentarea.style.display="block"
	t.moveTo(xpos, ypos) //Position window
	t.load(contenttype, contentsource, title)
	if (t.state=="minimized" && t.controls.firstChild.title=="Restore"){ //If window exists and is currently minimized?
		t.controls.firstChild.setAttribute("src", dhtmlwindow.imagefiles[0]) //Change "restore" icon within window interface to "minimize" icon
		t.controls.firstChild.setAttribute("title", "Minimize")
		t.state="fullview" //indicate the state of the window as being "fullview"
	}
	return t
},

setSize:function(t, w, h){ //set window size (min is 150px wide by 100px tall)
	t.style.width=Math.max(parseInt(w), 150)+"px"
	t.contentarea.style.height=Math.max(parseInt(h), 100)+"px"
},

moveTo:function(t, x, y){ //move window. Position includes current viewpoint of document
	this.getviewpoint() //Get current viewpoint numbers
	t.style.left=(x=="middle")? this.scroll_left+(this.docwidth-t.offsetWidth)/2+"px" : this.scroll_left+parseInt(x)+"px"
	t.style.top=(y=="middle")? this.scroll_top+(this.docheight-t.offsetHeight)/2+"px" : this.scroll_top+parseInt(y)+"px"
},

isResize:function(t, bol){ //show or hide resize inteface (part of the status bar)
	t.statusarea.style.display=(bol)? "block" : "none"
	t.resizeBool=(bol)? 1 : 0
},

isScrolling:function(t, bol){ //set whether loaded content contains scrollbars
	t.contentarea.style.overflow=(bol)? "auto" : "hidden"
},

load:function(t, contenttype, contentsource, title){ //loads content into window plus set its title (3 content types: "inline", "iframe", or "ajax")
	if (t.isClosed){
		alert("DHTML Window has been closed, so no window to load contents into. Open/Create the window again.")
		return
	}
	var contenttype=contenttype.toLowerCase() //convert string to lower case
	if (typeof title!="undefined")
		t.handle.firstChild.nodeValue=title
	if (contenttype=="inline")
		t.contentarea.innerHTML=contentsource
	else if (contenttype=="div"){
		var inlinedivref=document.getElementById(contentsource)
		t.contentarea.innerHTML=(inlinedivref.defaultHTML || inlinedivref.innerHTML) //Populate window with contents of inline div on page
		if (!inlinedivref.defaultHTML)
			inlinedivref.defaultHTML=inlinedivref.innerHTML //save HTML within inline DIV
		inlinedivref.innerHTML="" //then, remove HTML within inline DIV (to prevent duplicate IDs, NAME attributes etc in contents of DHTML window
		inlinedivref.style.display="none" //hide that div
	}
	else if (contenttype=="iframe"){
		t.contentarea.style.overflow="hidden" //disable window scrollbars, as iframe already contains scrollbars
		if (!t.contentarea.firstChild || t.contentarea.firstChild.tagName!="IFRAME") //If iframe tag doesn't exist already, create it first
			t.contentarea.innerHTML='<iframe src="" style="margin:0; padding:0; width:100%; height: 100%" name="_iframe-'+t.id+'"></iframe>'
		window.frames["_iframe-"+t.id].location.replace(contentsource) //set location of iframe window to specified URL
		}
	else if (contenttype=="ajax"){
		this.ajax_connect(contentsource, t) //populate window with external contents fetched via Ajax
	}
	t.contentarea.datatype=contenttype //store contenttype of current window for future reference
},

setupdrag:function(e){
	var d=dhtmlwindow //reference dhtml window object
	var t=this._parent //reference dhtml window div
	d.etarget=this //remember div mouse is currently held down on ("handle" or "resize" div)
	var e=window.event || e
	d.initmousex=e.clientX //store x position of mouse onmousedown
	d.initmousey=e.clientY
	d.initx=parseInt(t.offsetLeft) //store offset x of window div onmousedown
	d.inity=parseInt(t.offsetTop)
	d.width=parseInt(t.offsetWidth) //store width of window div
	d.contentheight=parseInt(t.contentarea.offsetHeight) //store height of window div's content div
	if (t.contentarea.datatype=="iframe"){ //if content of this window div is "iframe"
		t.style.backgroundColor="#F8F8F8" //colorize and hide content div (while window is being dragged)
		t.contentarea.style.visibility="hidden"
	}
	document.onmousemove=d.getdistance //get distance travelled by mouse as it moves
	document.onmouseup=function(){
		if (t.contentarea.datatype=="iframe"){ //restore color and visibility of content div onmouseup
			t.contentarea.style.backgroundColor="white"
			t.contentarea.style.visibility="visible"
		}
		d.stop()
	}
	return false
},

getdistance:function(e){
	var d=dhtmlwindow
	var etarget=d.etarget
	var e=window.event || e
	d.distancex=e.clientX-d.initmousex //horizontal distance travelled relative to starting point
	d.distancey=e.clientY-d.initmousey
	if (etarget.className=="drag-handle") //if target element is "handle" div
		d.move(etarget._parent, e)
	else if (etarget.className=="drag-resizearea") //if target element is "resize" div
		d.resize(etarget._parent, e)
	return false //cancel default dragging behavior
},

getviewpoint:function(){ //get window viewpoint numbers
	var ie=document.all && !window.opera
	var domclientWidth=document.documentElement && parseInt(document.documentElement.clientWidth) || 100000 //Preliminary doc width in non IE browsers
	this.standardbody=(document.compatMode=="CSS1Compat")? document.documentElement : document.body //create reference to common "body" across doctypes
	this.scroll_top=(ie)? this.standardbody.scrollTop : window.pageYOffset
	this.scroll_left=(ie)? this.standardbody.scrollLeft : window.pageXOffset
	this.docwidth=(ie)? this.standardbody.clientWidth : (/Safari/i.test(navigator.userAgent))? window.innerWidth : Math.min(domclientWidth, window.innerWidth-16)
	this.docheight=(ie)? this.standardbody.clientHeight: window.innerHeight
},

rememberattrs:function(t){ //remember certain attributes of the window when it's minimized or closed, such as dimensions, position on page
	this.getviewpoint() //Get current window viewpoint numbers
	t.lastx=parseInt((t.style.left || t.offsetLeft))-dhtmlwindow.scroll_left //store last known x coord of window just before minimizing
	t.lasty=parseInt((t.style.top || t.offsetTop))-dhtmlwindow.scroll_top
	t.lastwidth=parseInt(t.style.width) //store last known width of window just before minimizing/ closing
},

move:function(t, e){
	t.style.left=dhtmlwindow.distancex+dhtmlwindow.initx+"px"
	t.style.top=dhtmlwindow.distancey+dhtmlwindow.inity+"px"
},

resize:function(t, e){
	t.style.width=Math.max(dhtmlwindow.width+dhtmlwindow.distancex, 150)+"px"
	t.contentarea.style.height=Math.max(dhtmlwindow.contentheight+dhtmlwindow.distancey, 100)+"px"
},

enablecontrols:function(e){
	var d=dhtmlwindow
	var sourceobj=window.event? window.event.srcElement : e.target //Get element within "handle" div mouse is currently on (the controls)
	if (/Minimize/i.test(sourceobj.getAttribute("title"))) //if this is the "minimize" control
		d.minimize(sourceobj, this._parent)
	else if (/Restore/i.test(sourceobj.getAttribute("title"))) //if this is the "restore" control
		d.restore(sourceobj, this._parent)
	else if (/Close/i.test(sourceobj.getAttribute("title"))) //if this is the "close" control
		d.close(this._parent)
	return false
},

minimize:function(button, t){
	dhtmlwindow.rememberattrs(t)
	button.setAttribute("src", dhtmlwindow.imagefiles[2])
	button.setAttribute("title", "Restore")
	t.state="minimized" //indicate the state of the window as being "minimized"
	t.contentarea.style.display="none"
	t.statusarea.style.display="none"
	if (typeof t.minimizeorder=="undefined"){ //stack order of minmized window on screen relative to any other minimized windows
		dhtmlwindow.minimizeorder++ //increment order
		t.minimizeorder=dhtmlwindow.minimizeorder
	}
	t.style.left="10px" //left coord of minmized window
	t.style.width="200px"
	var windowspacing=t.minimizeorder*10 //spacing (gap) between each minmized window(s)
	t.style.top=dhtmlwindow.scroll_top+dhtmlwindow.docheight-(t.handle.offsetHeight*t.minimizeorder)-windowspacing+"px"
},

restore:function(button, t){
	dhtmlwindow.getviewpoint()
	button.setAttribute("src", dhtmlwindow.imagefiles[0])
	button.setAttribute("title", "Minimize")
	t.state="fullview" //indicate the state of the window as being "fullview"
	t.style.display="block"
	t.contentarea.style.display="block"
	if (t.resizeBool) //if this window is resizable, enable the resize icon
		t.statusarea.style.display="block"
	t.style.left=parseInt(t.lastx)+dhtmlwindow.scroll_left+"px" //position window to last known x coord just before minimizing
	t.style.top=parseInt(t.lasty)+dhtmlwindow.scroll_top+"px"
	t.style.width=parseInt(t.lastwidth)+"px"
},

close:function(t){
	try{
		var closewinbol=t.onclose()
	}
	catch(err){ //In non IE browsers, all errors are caught, so just run the below
		var closewinbol=true
 }
	finally{ //In IE, not all errors are caught, so check if variable isn't defined in IE in those cases
		if (typeof closewinbol=="undefined"){
			alert("An error has occured somwhere inside your \"onclose\" event handler")
			var closewinbol=true
		}
	}
	if (closewinbol){ //if custom event handler function returns true
		if (t.state!="minimized") //if this window isn't currently minimized
			dhtmlwindow.rememberattrs(t) //remember window's dimensions/position on the page before closing
		if (window.frames["_iframe-"+t.id]) //if this is an IFRAME DHTML window
			window.frames["_iframe-"+t.id].location.replace("about:blank")
		else
			t.contentarea.innerHTML=""
		t.style.display="none"
		t.isClosed=true //tell script this window is closed (for detection in t.show())
	}
	return closewinbol
},

setopacity:function(targetobject, value){ //Sets the opacity of targetobject based on the passed in value setting (0 to 1 and in between)
	if (!targetobject)
		return
	if (targetobject.filters && targetobject.filters[0]){ //IE syntax
		if (typeof targetobject.filters[0].opacity=="number") //IE6
			targetobject.filters[0].opacity=value*100
		else //IE 5.5
			targetobject.style.filter="alpha(opacity="+value*100+")"
		}
	else if (typeof targetobject.style.MozOpacity!="undefined") //Old Mozilla syntax
		targetobject.style.MozOpacity=value
	else if (typeof targetobject.style.opacity!="undefined") //Standard opacity syntax
		targetobject.style.opacity=value
},

setfocus:function(t){ //Sets focus to the currently active window
	this.zIndexvalue++
	t.style.zIndex=this.zIndexvalue
	t.isClosed=false //tell script this window isn't closed (for detection in t.show())
	this.setopacity(this.lastactivet.handle, 0.5) //unfocus last active window
	this.setopacity(t.handle, 1) //focus currently active window
	this.lastactivet=t //remember last active window
},

show:function(t){
	if (t.isClosed){
		alert("DHTML Window has been closed, so nothing to show. Open/Create the window again.")
		return
	}
	if (t.lastx) //If there exists previously stored information such as last x position on window attributes (meaning it's been minimized or closed)
		dhtmlwindow.restore(t.controls.firstChild, t) //restore the window using that info
	else
		t.style.display="block"
	this.setfocus(t)
	t.state="fullview" //indicate the state of the window as being "fullview"
},

hide:function(t){
	t.style.display="none"
},

ajax_connect:function(url, t){
	var page_request = false
	var bustcacheparameter=""
	if (window.XMLHttpRequest) // if Mozilla, IE7, Safari etc
		page_request = new XMLHttpRequest()
	else if (window.ActiveXObject){ // if IE6 or below
		try {
		page_request = new ActiveXObject("Msxml2.XMLHTTP")
		} 
		catch (e){
			try{
			page_request = new ActiveXObject("Microsoft.XMLHTTP")
			}
			catch (e){}
		}
	}
	else
		return false
	t.contentarea.innerHTML=this.ajaxloadinghtml
	page_request.onreadystatechange=function(){dhtmlwindow.ajax_loadpage(page_request, t)}
	if (this.ajaxbustcache) //if bust caching of external page
		bustcacheparameter=(url.indexOf("?")!=-1)? "&"+new Date().getTime() : "?"+new Date().getTime()
	page_request.open('GET', url+bustcacheparameter, true)
	page_request.send(null)
},

ajax_loadpage:function(page_request, t){
	if (page_request.readyState == 4 && (page_request.status==200 || window.location.href.indexOf("http")==-1)){
	t.contentarea.innerHTML=page_request.responseText
	}
},

stop:function(){
	dhtmlwindow.etarget=null //clean up
	document.onmousemove=null
	document.onmouseup=null
},

addEvent:function(target, functionref, tasktype){ //assign a function to execute to an event handler (ie: onunload)
	var tasktype=(window.addEventListener)? tasktype : "on"+tasktype
	if (target.addEventListener)
		target.addEventListener(tasktype, functionref, false)
	else if (target.attachEvent)
		target.attachEvent(tasktype, functionref)
},

cleanup:function(){
	for (var i=0; i<dhtmlwindow.tobjects.length; i++){
		dhtmlwindow.tobjects[i].handle._parent=dhtmlwindow.tobjects[i].resizearea._parent=dhtmlwindow.tobjects[i].controls._parent=null
	}
	window.onload=null
}

} //End dhtmlwindow object

document.write('<div id="dhtmlwindowholder"><span style="display:none">.</span></div>') //container that holds all dhtml window divs on page
window.onunload=dhtmlwindow.cleanup

</script>
</head>
<body>

var googlewin=dhtmlwindow.open("googlebox", "iframe", "http://images.google.com/", "#1: Google Web site", "width=590px,height=350px,resize=1,scrolling=1,center=1", "recal")

googlewin.onclose=function(){ //Run custom code when window is being closed (return false to cancel action):
return window.confirm("Close window?")
}

</script>

<p>ウィンドウの操作 (iframe content)</p>
<ul>
<li><a href="#" onClick="googlewin.show(); return false">ウィンドウを開く</a></li>
<li><a href="#" onClick="googlewin.hide(); return false">ウィンドウを閉じる</a></li>
<li><a href="#" onClick="googlewin.load('iframe', 'http://jsajax.com', 'JavaScript + Ajax'); return false">JavaScript + Ajaxのサイトを表示</a></li>
<li><a href="#" onClick="googlewin.setSize(800, 500); return false">ウィンドウをリサイズ(800 x 600)</a></li>
</ul>

</body>
</html>

このサンプルを編集して試してみる!

<a href="#" onClick="googlewin.show(); return false">ウィンドウを開く</a>   
<a href="#" onClick="googlewin.hide(); return false">ウィンドウを閉じる</a>

jQueryを使い倒せ! jQueryでAjaxを実装するための基礎知識と実践サンプルを一挙公開中...

ウィンドウ ウィジェット

ウィンドウ　ウィジェット