Horizontal progress bar with interpolat​e color
Looking for a control "horizontal progress bar" with interpolate color and markers like control "meter"
If I get this right - you are looking for a progress bar that changes colour as the number changes. You can set the colour of the progress bar using property nodes. I have included a VI here that I used for testing this. This VI changes the colour from green to red as the progress bar advances. Colours are stored as 3 bytes: Red, Green and Blue.
I hope that this helps.
Rob
Attachments:
Changing_Progress_Bar.vi 27 KB
Similar Messages
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JavaFX progress bar with glow effect.
I am hoping someone can help me with this issue. I recently followed James Clarke example of a progress bar with glow effect and it helped with developing a progress bar for an application I was working on. But now, with the JavaFX sdk 1.2 update, the application does not fully work anymore. The progressbar.fx code is posted below:
ProgressBar.fx code:
import java.lang.Math;
import java.lang.Object;
import javafx.animation.Interpolator;
import javafx.animation.Timeline;
import javafx.scene.CustomNode;
import javafx.scene.effect.GaussianBlur;
import javafx.scene.Group;
import javafx.scene.Node;
import javafx.scene.paint.Color;
import javafx.scene.paint.Paint;
import javafx.scene.Scene;
import javafx.scene.shape.Ellipse;
import javafx.scene.shape.Rectangle;
import javafx.scene.text.Font;
import javafx.scene.text.Text;
import javafx.scene.text.TextOrigin;
import javafx.stage.Stage;
import javafx.scene.layout.Resizable;
public class ProgressBar extends CustomNode, Resizable{
public var min: Number;
public var max: Number = 100.0;
public var value: Number;
public var background: Paint = Color.rgb(118,149,178);
public var foreground: Paint = Color.rgb(216,219,225);
public var font = bind Font{name: "Courier Bold Italic" size: height - borderWidth * 8};
public var arcWidth: Number = 20;
public var arcHeight: Number = 50;
public var borderStroke: Color = Color.BLACK;
public var borderWidth: Number = 1;
public var fontPaint: Paint = Color.LIGHTGRAY;
public var showPercentage = true;
var progressText: Text;
var backgroundText: Text;
var progessBar: Rectangle;
var range = bind Math.abs(max - min);
var percentComplete: Number = bind if(max != 0) { (
value - min) / max
} // if
else {0.0;} // else;
var currentX = bind percentComplete * width;
var blurX: Number = 30;
var progressString: String = bind "%%{%.0f (percentComplete*100)}";
var progressValue = bind "{%.2f value}";
var progressHeight = bind height - borderWidth * 4;
var blurAnim = Timeline {
repeatCount: Timeline.INDEFINITE
autoReverse: true
keyFrames: [
at(0s) { blurX => 0.0 }
at(2s) { blurX =>
currentX - progressHeight / 2 tween Interpolator.EASEBOTH }
var playing = bind visible on replace{
if(playing) {
blurAnim.play();
}else {
blurAnim.stop();
public override function create(): Node {
return Group {
content: [
Rectangle { //background
width: bind width
height: bind height
fill: bind background
stroke: bind borderStroke
strokeWidth: bind borderWidth
arcWidth: bind arcWidth
arcHeight: bind arcHeight
cache: true
backgroundText = Text { // Text over Background
layoutX: bind (width - backgroundText.layoutBounds.width) / 2
layoutY: bind (height - backgroundText.layoutBounds.height) / 2
textOrigin: TextOrigin.TOP
font: bind font
fill: bind foreground
content: bind if(showPercentage) progressString else progressValue
cache: true
Group {
content: [
progessBar = Rectangle { // Progress
layoutX: bind borderWidth
layoutY: bind borderWidth * 2
width: bind currentX
height: bind progressHeight
fill: bind foreground
arcWidth: bind arcWidth
arcHeight: bind arcHeight
Ellipse {
centerX: bind blurX
centerY: bind height / 2
radiusX: bind progressHeight
radiusY: bind progressHeight / 2
fill: Color.rgb(255,255,255,.7)
effect: GaussianBlur{ radius: 30
Text { // Text Over Progress Bar, this has to be in progressBar coordinate space
x: bind (width - backgroundText.layoutBounds.width) / 2
y: bind (height - backgroundText.layoutBounds.height) / 2
textOrigin: TextOrigin.TOP
font: bind font
fill: bind background
content: bind if(showPercentage) progressString else progressValue
clip: bind progessBar
}, // Text
] // 2nd content
} // 2nd Group
] // 1st content
}; // 1st Group
} // public override function create(): Node
} // public abstract class ProgressBar extends CustomNode, Resizeable
function run(args:String[]):Void {
var stage: Stage = Stage {
title: "Progress Bar"
scene: Scene {
width: 925
height: 60
content: ProgressBar {
layoutX: 10
layoutY: 10
width: 890
height: 35
value: 80
} // content: ProgressBar
} // scene: Scene
} // var stage: Stage = Stage
} // function run(args:String[]):Void
I use RESTful ws to get the progress of the billing run, which is the loadProgressdata() method in the main.fx, and everything was working fine until we did the javafx sdk 1.2 update. With the update in place, I recompiled the project and found that "Resizable" in
the "public class ProgressBar extends CustomNode, Resizable" was throwing an error when the project was recompiled. I made some changes(mainly adding variables for height and width) but now when the program runs, the backing rectangle appears along with the
percentage of billing progress, but the progress part(2nd rectangle) does not appear with the glow effect. I have read about using "getPrefWidth()" and "getPrefHeight()" methods, but not really sure how I would use them. I can't make the public class ProgressBar extends CustomNode, Resizable abstract as I need to instantiate in the Main.fx.
Can anyone shed some light on what might need to be done to get this running correctly again. I don't need anyone the give me the exact code, but just to point me in the correct direction.Can you post your code again between "{ code} ... {code }" tags ? Some symbols are missing if copy/pasted.
That said, your preferred width and height, simply return the width and height of your component. What I discovered recently is using LayoutInfo on controls to set the preferred width and height. These are the dimensions the surrounding container (VBox, HBox, Flow, ....) will use to arrange size and position of the enclosed components. So maybe you won't need Resizable any more. Simply fill in the layoutInfo property.
Edited by: Java.Artisan on Jun 26, 2009 11:25 AM
Edited by: Java.Artisan on Jun 26, 2009 11:26 AM -
System horizontal progress bar cannot be customized
I noticed that I cannot customize a system horizontal progress bar by going to right-click>>Advanced>>Customize. When the control editor shows up, the customize mode button is grayed out.
I can customize a numeric control or a string control using the above procedure, so why can't I do the same for a system progress bar?
Message Edited by S G on 10-01-2007 05:32 PM
S G
Certified LabVIEW Architect, Certified TestStand Developer, Certified Professional InstructorYes. It makes sense that the system controls are not customizable.
However, I do have situations where I would like to customize the system controls. For instance, with the slide control/indicator, when you make the digital display visible, it shows up in a box. When your slide is a control, the right side of the box contains the increment/decrement buttons. When your slide is an indicator, these buttons are invisible, but the the box is still big enough to include them. So, the box on the slide indicator is unnecessarily big on the right side. Take a look at the example.vi and you will see what I mean.
S G
Certified LabVIEW Architect, Certified TestStand Developer, Certified Professional Instructor
Attachments:
Example.vi 8 KB -
My iPhone 4s is not switching on, I connected it to itunes thru my Windows 7 laptop and it says phone needs to be restored. I clicked okay and it started the process however the progress bar with the apple logo is on the screen, progress in the bar did not start yet after 5 hours. Some one please hep me.
I did put it in DFU mode but its still not working, although everytime it shows your iphone needs to be restored. Kindly help.
-
How to use a progress bar with java mail?
Hi, i'm new here.
I want if someone can recommend me how to show a progress bar with java mail.
Because, i send a message but the screen freeze, and the progress bar never appear, after the send progress finish.
ThanksSo why would the code we post be any different than the code in the tutorial? Why do you think our code would be easier to understand? The tutorial contains explanations about the code.
Did you download the code and execute it? Did it work? Then customize the code to suit your situation. We can't give you the code because we don't know exactly what you are attempting to do. We don't know how you have changed to demo code so that it no longer works. Its up to you to compare your code with the demo code to see what the difference is. -
Progress bar with Cancel button
Hi Gurus,
How to implement the Progressing bar with Cancel btn using the ScriptUI?, is it possible in script UI ?
Thanks in advance.
Regards,
Imaginewhat i said is that you need to hava a reference to your thread ine the class that handle the progressBar.
and in your Thread class you create a method like setCanceled(boolean b)...
public MyThread extends Thread{
private boolean canceled = false;
public void setCanceled(boolean b){
canceled = b;
public void run(){
while(!canceled){
//do your stuff -
How do I create a horizontal nav-bar with CSS, set to an exact width?
I have a problem that I need help with. All I need to do is
to create a simple text-based horizontal navigation bar using CSS.
I have seen many CSS tutorials online about how to make a
horizontal navigation bar using unordered lists, but they all seem
to either set the bar to be centred or to the full width of the
page, or if they do set it to be a certain width, then the buttons
within that width are centred within pre-defined widths for each
one.
Unfortunately none of these help me - let me explain my
scenario...
I have an area that is exactly 700px wide. In this area I
want to put 5 text hyperlinks.
I want the first text-link to be aligned to the left of my
700px width, and I want the last text-link to be aligned to the
right of the 700px width.
I want the spaces between each of these text-links to all be
the same.
The only definite known width is the overall 700px. I will
not know the width of each text-link, as (a) they are all live
text, and (b) the phrases for each could change.
I have mocked up a quick diagram showing in more detail
precisely what I mean:
http://www.nothowitlooks.com/temp/navbar.gif
Can anyone please help me with this?
Thanks..oO(BrettArchibald)
>Oh look, a third person joining the discussion and not
actually proposing any
>solutions to the original query. Just what this thread
needs.
Oh look, a person seeking for help turning into a troll. Just
what this
group needs.
> Well, to be fair, Kim did make a sterling effort in
trying, but just didn't
>manage to fully understand the layout required.
>
> To address your "points":
>
quote:
some things simply can't be done or don't make any sense in
the Web. Even a
>client has to accept that. Let them write wishes to Santa
Clause if they want,
>but they have to accept the rules of the medium they're
working with.
>Period.
> Wrong, wrong, silly comment and wrong.
>
> To elaborate: firstly, with regards to design,
everything can be done, it's
>simply a matter of how.
Only in your fantasy. In practice there are always some
limits enforced
by the used material or technology. You simply can't violate
such basic
rules and laws, even if you would like to.
>Whether you use text, images, tables, CSS, or even
>Flash, the objective is first to design the site with
both your client's and
>their customers needs and expectations, and then to build
it, regardless of how
>difficult-to-code that design may or may not be.
It always looks good on paper, but not every design can be
turned into
practice. This not only applies to web design, but to almost
every kind
of development. Often enough you have to find compromises or
workarounds
if the engineers say "won't work". The problem is that many
designers
don't understand this or don't want to. They're just thinking
and living
in their perfect theoretical world, but have no idea of how
things work
in the real world. And many theoretical things simply don't
work there.
Each medium has its own rules and laws. Some things may work
well for a
printed paper for example, but not in the Web and vice versa.
Of course
you can try to break these rules, but you'll definitely fail.
>You should not compromise your
>design because of a lack of coding knowledge.
It's not lack if coding knowledge if you refuse to try things
that are
impossible or don't make sense. It's quite the opposite,
because you
don't have to waste your time with something that won't work
at all.
>If you don't know how to do it
>yourself, then find out how to do it (which is what I was
*originally* trying
>to do here, remember?).
Quite easy. Surf the web, and if you see something like what
you want,
just have a look at the source code or post the URL here. If
it can be
done, then it already has been done. Just show us an example
and we'll
happily explain it to you.
> Secondly, no, a client does NOT have to accept that
"some things simply can't
>be done or don't make any sense in the Web".
Sure they have. The client is not always king. And if they
insist on
stupid things and always know it better - why the hell are
they hiring
you instead of doing it themselves? If they want their work
to be done
by an expert, they should also _listen_ to that expert and
let him do
his work properly instead of telling him how he should do it.
That's not
going to work.
>Like I said earlier, some clients
>are not interested in hearing about how what they want
cannot be done, and any
>attempts to tell them so only serve to convince them to
take their work, and
>their money, to someone else. Most clients, thankfully,
are adaptable and
>willing to reason. However, some are not, and if these
clients take their money
>elsewhere, you lose the job and you don't get paid. It's
that simple.
Let's say you want a little film to be made about whatever.
Would you
tell the director where he should position the cameras, the
lights and
all the stuff? He already knows _what_ you want to get, so
why don't you
just let him decide _how_ to do it? It's his job! And if he
says that
filming directly towards bright sunlight usually doesn't work
well, you
should respect his expert opinion.
>
quote:
You won't make friends here with such an attitude. Please
stop insulting
>regulars or just leave.
>
> Firstly, I'm not here to make friends. Neither am I here
to make enemies. I am
>here to get help with a coding problem. When people offer
"alternative advice"
>that hinders my progress in finding a solution, I tell
them so. I give back
>what I get.
You asked for advice and you got proper answers. We really
don't need
people here just looking for the answers they want to hear.
Often enough
people are coming here looking for a cure to a particular
problem, while
it would be much easier to avoid that problem right from the
beginning.
Of course if they don't want to hear such alternatives -
their problem.
> Secondly, I was not aware that "regulars" to this site
had any special
>"insult-free privileges" or suchlike that newcomers did
not.
It's not the best idea to bite the hand that feeds you. It's
the group's
regulars who answer almost all of the questions here. And
most of them
also know how to use a killfile.
>I don't care if
>someone is a regular or a newcomer - when I ask a
technical question and
>instead of either potential advice or even silence, I
instead receive
>un-warranted "design advice", I'll make my opinions
known.
So do we. If someone wants something that's not possible or
not going to
work, we'll "make our opinions known". After all that's what
a free
discussion board/forum/group is for.
> As for the "just leave" suggestion for supposedly
"insulting regulars", I
>could very well say the exact same thing to you, for the
reason of not actually
>contributing anything to the discussion that attempts to
address the original
>query of this thread.
> In fact, you know what, I think I will. Here goes:
> Please either propose a solution to my original CSS
problem or just leave.
> There, how was that?
Want to try again?
With pure CSS and text links it can't be done within the
given
constraints. I even doubt that it's possible with a table. So
either
drop the fixed 700px width or the equal space between the
buttons.
> P.S: Seeing as though pedantry seems to be something
you're interested in,
>judging by the "rant" tag comment, I thought I'd point
out that you spelled
>Santa Clause wrong.
You can keep the 'e'. In German we have more than enough of
them.
And if you would be familiar with web design, then you would
have known
where this ironic "error message" came from.
Your turn.
Micha -
hi i rescently updated my ipad 4 in ios 7.0.4 and for resell purpose i want to restore my ipad via itunes but it got stuck at apple logo and progress bar of 45% completed i tried it 50 times but it stuck on that exact point for hours i cant able to restore it and had no errors it just like freezes at one point i also uses dfu mode but got stuck at same problem using windows 7 32 bits itunes 11.3.8 ipad 4 wifi please help
My iPhone 5 wouldn't start after I turned it off a few minutes after writing this. It went into recovery mode and I had no choice but to connect to iTunes on PC and restore.
I restored to factory setting first, just to validate my phone was okay. For a second consecutive iOS update, the iPhone 5 did not update smoothly while connected to PC and iTunes - I had to retry two times before the progress bar for the update showed. (The exact same problem with the restart occured when I updated to 7.0.4.)
The good news is that I was ultimately able to restore the iPhone 5 to factory settings while running iOS 7.0.6. I did have a backup from about a month ago lying around and was able to successfully restore with that as well, so the damage done is almost negligible since I had my contacts, notes, mail, etc. backed up to iCloud.
Once I completed both restores, the sync with iTunes worked fine. -
Black screen/progress bar with Yosemite startup
Since installing Yosemite on my relatively new imac, when I boot up i get a black screen with the Apple logo and a progress bar, which takes about 90 seconds to load. I've tried disc first aid, verify/repair permissions etc , done a new install from my backup disc but it still persists. is this now the way of the yosemite world?
Thanks
BruceTry booting into the Safe Mode using your normal account. Disconnect all peripherals except those needed for the test. Shut down the computer and then power it back up after waiting 10 seconds. Immediately after hearing the startup chime, hold down the shift key and continue to hold it until the gray Apple icon and a progress bar appear and again when you log in. The boot up is significantly slower than normal. This will reset some caches, forces a directory check, and disables all startup and login items, among other things. When you reboot normally, the initial reboot may be slower than normal. If the system operates normally, there may be 3rd party applications which are causing a problem. Try deleting/disabling the third party applications after a restart by using the application un-installer. For each disable/delete, you will need to restart if you don’t do them all at once.
Safe Mode - About
Safe Mode - Yosemite -
[SOLVED] No icon or progress bar with notify-osd-customizable
Hello,
I just reinstalled my system; I use a script to know my brightness and audio volume but I can't get it working anymore.
With this
notify-send 'Hello world!' -i dialog-information
I only get the text. If I try this to have a progress bar
notify-send 'Hello world!' -i dialog-information -h int:value:50
I just get a notification with 1px height.
I installed notify-osd-icons to have more icons, but it didn't help.
The arguements have changed?
Last edited by Dreamkey (2013-02-13 13:02:29)Ok, I'm not sure if it's because of that, but I installed human-icon-theme and after a reboot, it worked.
-
Scale progress bar with Event.RESIZE
Hi all,
I am trying to create a preloader bar that goes across the whole stage. The code below works fine, except that I would also like to be able to resize the stage and have the preloader bar recognize this and change it's scaleX to accomodate the larger or smaller browser size. Does this make sense? I'm having trouble with the equation to adjust the preloader bar scaleX within the "onResizeStageLoad" function.
function PL_LOADING(event:ProgressEvent):void {
var pcent:Number=event.bytesLoaded/event.bytesTotal*100;
//Stretch the bar
lbar.scaleX=pcent/100;
if(pcent >=100){
this.gotoAndStop(2);
stage.removeEventListener(Event.RESIZE, onResizeStageLoad);
stage.addEventListener(Event.RESIZE, onResizeStageLoad);
function onResizeStageLoad(evt:Event):void{
What goes in here?
Thanks!Just to close this out. You need to submit the form from within the onComplete javascript. The prior version of the progress bar 'automatically' called submitFomr() when the progress bar was 100%. That is no longer true. You must explicitly call the submitForm() javascript in onComplete. Don't know if this is a bug in the new version or not? I recommend that the submitForm() be made the default function for onComplete is none is specified in the component properties.
-
Hi,
I have a page that is used as a search
page that uses sql "like" queries.As
you know it takes an awfull lot of time
to search through 30,000 records using
a "like" statement,so i'd figured I create a nice
javascript progress bar to be displayed until
the results come up.Does anyone know how
to do this?
So when the search button is clicked then the
progress bar/REGION should be display and
when the results come up, the progress bar should
be hidden.
Any good suggestions?The way I did it is
I added this javascript to the page header:
<script language="JavaScript" type="text/javascript">
<!--
/*- id can be element or nd or name returns element node */
function html_GetElement(nd){
switch(typeof (nd)){
case 'string':node = document.getElementById(nd);break;
case 'object':node = nd;break;
default:node = null;break;
return node;
function html_CascadeUpTill(START,TAG){
var node = html_GetElement(START);
if(node){
var node = node.parentNode;
while(node.nodeName != TAG){
node = node.parentNode;
return node;
/*- hides given node */
function html_HideElement(nd){
var node = html_GetElement(nd);
node.style.display = "none";
return node
/*- show given node */
function html_ShowElement(nd){
var node = html_GetElement(nd);
node.style.display = "";
return node
/*- toggle node visibility */
function html_ToggleElement(nd){
var node = html_GetElement(nd);
if(node.style.display == "none"){html_ShowElement(node)}
else{html_HideElement(node)}
return node
var g_LastRowOpened = false;
var g_LastDetailLabel = false;
var g_ShowOnlyOne = false;
function showdetail(t,i){
var l_TR = html_CascadeUpTill(t,'TR');
var l_ThisTable = html_CascadeUpTill(t,'TABLE');
/* comment out following if statement if you don't care about only showing one at a time */
if(html_GetElement('P1_MULTI_0').checked==false && g_LastRowOpened && g_LastRowOpened != l_TR){
ShowHideDetailRow(g_LastDetailLabel,l_ThisTable,g_LastRowOpened,i); //hides last row shown and resets label
ShowHideDetailRow(t,l_ThisTable,l_TR,i);
g_LastDetailLabel = t; // set the last show/hide_detail clicked
g_LastRowOpened = l_TR; // set the last row clicked
function ShowHideDetailRow(pThis,pTable,pTR,pID){
var l_NumCells = pTR.cells.length;
if(pTR.rowIndex == pTable.rows.length-1 || pTable.rows[pTR.rowIndex+1].className != "detail"){
var myNewRow = pTable.insertRow(pTR.rowIndex+1);
myNewRow.className = "detail";
var myNewCell = myNewRow.insertCell(0);
myNewCell.className = "t4data";
myNewCell.colSpan=l_NumCells;
myNewCell.appendChild(html_GetElement(pID));
html_ShowElement(pID);
}else{
html_ToggleElement(pTable.rows[pTR.rowIndex+1]);
SetDetailLabel(pThis);
function SetDetailLabel(pThis){
if(pThis.innerHTML == 'show_detail'){
pThis.innerHTML = 'hide_detail'
}else{
pThis.innerHTML = 'show_detail'
//-->
</script>
then made my button a URL target and added:
javascript:html_ShowElement('AjaxLoading');doSubmit('SEARCH');
and finally added this to my HTML's region source:
<style> #AjaxLoading{padding:5px;font-size:18px;width:200px;text-align:center;left:50%;top:50%;position:absolute;border:2px solid #666;background-color:#FFF;}
</style>
<div id="AjaxLoading" style="display:none;">..Loading..
<img src="#WORKSPACE_IMAGES#processing3.gif" /></div>
I know its a bit amatuer but it seems to be working fine.
The only problem that I've got is that it doesnt work when hitting <Return> to do the search rather than clicking on the search button.
rather than -
Progress bar with install screen.
Hi all,
On my app I need a progress bar when I the app install some RMS records. Because of the app has near a milliom of records, this install is so longer, and I t's better show the progress of it with an bar :).
How it's possible do it?
Kind regards.In such case i recomend writing your own LoadingCanvas or something like that (You draw a kind of rectangle which size is connected to current progress). Animating this canvas while conducting another task is a different issue. In my soft I needed to view a progress bar while downloading images and so on from net. I achived it by running one separete thread for the connection and lunching a timerTask for the canvas redraw events. In my case it worked fine almost on every device but ned Nokia E series phones had some problems in memory management of 2 paralel task so i had to remove this form my app becouse it caused instability of application.
Regards
mchmiel -
Progress bar with background task
Hi, I am using background agent to upload files. Its taking about 30 min to upload a single image or audio file. Is there any method to reduce the time to launch the background agent in production. I'm using the following line for debug process and its
working fine and the files are getting uploaded as soon as possible. But when the application is in windows phone store im not able to use this line of code. Please help if there is any solution to reduce the time for background agent launch. Also is there
any UI changes I can make while the background process is running, so that the user can identify that the file is uploading. Can I use progress bar indicator or anything when the background file is uploading. Thanks.
ScheduledActionService.LaunchForTest("My periodic task", TimeSpan.FromSeconds(3));
NikithaAssuming this is a Windows Phone 8.1 XAML Application:
https://msdn.microsoft.com/en-us/library/windows/apps/xaml/Hh452975(v=win.10).aspx
The following sample illustrates how to do all of this with progress etc...
https://code.msdn.microsoft.com/windowsapps/Background-Transfer-Sample-d7833f61
Bret Bentzinger (MSFT) @awehellyeah -
Is there a way to use a progress bar with Xerces XML Parser?
My program is parsing very long XML files that take several minutes to parse. I am using Xerces as the parser. I would like to use a progress bar to show the progress, but I haven't found any way to get Xerces to give progress updates. Is this possible?
Use teh SAX parser and listen to SAX events. Example:
import java.io.*;
import java.util.*;
//jaxp-api.jar:
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
//sax.jar:
import org.xml.sax.Attributes;
import org.xml.sax.InputSource;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.DefaultHandler;
import mine.IOUtils;
* Handler to read content from (large) XML sources and send events to registered XMLListeners. Use this class to read
* big (multiple megabytes) XML files via SAX and listen to XML events to process XML elements.
* For small (less than a megabyte) XML files, it's more convenient to use the DOM API
* to read the XML into a DOM document and perform XPath commands. DOM is easier to handle but has
* the drawback that the complete XML content is stored in one big DOM document object in memory.
public final class XMLHandler extends DefaultHandler {
/** (Reusable) XMLReader to parse an XML document. */
private XMLReader xmlReader = null;
/** Registered XMLEventListeners. */
private List<XMLListener> listeners = new ArrayList<XMLListener>();
/** Value of current element. */
private StringBuilder elementValue = null;
/** Stack of current element and all of its parent elements. */
private Stack<String> elementStack = new Stack<String>();
* Constructor.
* @throws Exception
public XMLHandler() throws Exception {
super();
// Create a JAXP SAXParserFactory and configure it
final SAXParserFactory spf = SAXParserFactory.newInstance(); //Use the default (non-validating) parser
spf.setValidating(true);
// Create a JAXP SAXParser
final SAXParser saxParser = spf.newSAXParser();
// Get the encapsulated SAX XMLReader
xmlReader = saxParser.getXMLReader();
xmlReader.setContentHandler(this);
xmlReader.setDTDHandler(this);
xmlReader.setEntityResolver(this);
xmlReader.setErrorHandler(this);
}//XMLHandler()
* Add XMLListener to receive XML events from the current XML document.
* If <i>listener</i> is null, no exception is thrown and no action is performed.
* @param listener XMLListener to add.
public void addXMLEventListener(final XMLListener listener) {
if (listener != null) {
listeners.add(listener);
}//addXMLEventListener()
* Parse current XML document. Registered XMLEventListeners will receive events during parsing.
* @param fileName Name of file to read XML content from.
* @throws Exception
public void parse(final String fileName) throws Exception {
if (fileName != null) {
parse(IOUtils.openInputStream(fileName));
}//readXML()
* Parse current XML document. Registered XMLEventListeners will receive events during parsing.
* @param inputStream InputStream to read XML content from.
* @throws Exception
public void parse(final InputStream inputStream) throws Exception {
if (inputStream != null) {
xmlReader.parse(new InputSource(inputStream));
}//readXML()
* Overwrite super.
* Receive notification of the beginning of the document.
@Override
public void startDocument() {
for (XMLListener l : listeners) {
l.documentStarted();
}//startDocument()
* Overwrites super.
* Receive notification of the start of an element.
@Override
public void startElement(final String uri, final String localName, final String qName, final Attributes atts) {
elementStack.push(qName);
for (XMLListener l : listeners) {
l.elementStarted(qName, elementStack);
elementValue = new StringBuilder(); //element value
//element attributes:
if (atts.getLength() > 0) {
String attName = null;
for (int i = 0; i < atts.getLength(); i++) {
attName = atts.getQName(i);
final String attValue = atts.getValue(i);
for (XMLListener l : listeners) {
l.attributeRead(qName, attName, attValue);
}//next attribute
}//else: no attributes
}//startElement()
* Overwrites super.
* Receive notification of character data inside an element. This method can be called multiple times
* from SAX, so we need to append all results of all calls to the final element value.
@Override
public void characters(final char ch[], final int start, final int length) {
String s = new String(ch, start, length);
elementValue.append(s);
}//characters()
* Overwrites super.
* Receive notification of the end of an element.
@Override
public void endElement(final String uri, final String localName, final String qName) {
for (XMLListener l : listeners) {
l.elementEnded(qName, elementValue.toString());
elementStack.pop();
}//endElement()
* Overwrite super.
* Receive notification of the end of the document.
@Override
public void endDocument() {
for (XMLListener l : listeners) {
l.documentEnded();
}//endDocument()
}//XMLHandler
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