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Articles indexed Friday April 2 2010

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  • ZK: Problem with JavaScript method invoking from action in Google Chrome

    - by Arkady Kashin
    I have a zul file with description of simple window, which contains button with action : <?xml version="1.0" encoding="UTF-8"?> <zk xmlns:html="http://www.w3.org/1999/xhtml" xmlns="http://www.zkoss.org/2005/zul" xmlns:zk="http://www.zkoss.org/2005/zk" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.zkoss.org/2005/zul http://www.zkoss.org/2005/zul/zul.xsd"> <window title="My First Window" border="normal" width="200px"> <button label="click me" action="onclick:initObj()" /> <script type="text/javascript" defer="true"> function initObj() { alert('initObj invoked'); zkJScriptObject.init(); } zkJScriptObject = { init: function () { alert('init invoked'); } }; </script> </window> </zk> Clicking on the button successfully invokes Javascript function initObj() and shows alerts in FireFox and in IE, but in Google Chrome causes error "Uncaught ReferenceError: initObj is not defined"? Do you have any suggestions, what is the reason of that problem in Google Chrome and how can I fix it? P.S. I'm using ZK 3.6.3.

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  • How to use ASTRewrite split one field declaration into two?

    - by user307598
    For example: private long p, q, g, h; I want to split this field declaration as: private long p; private long q, g, h; How can I use ASTRewrite to do it? I tried to use ASTNode copyFd = rewriter.createCopyTarget(fd) to copy the field declaration, modify it, then add to field declaration list, but my modification on copyFd is not seen. It's just the same to fd. Why? Anybody can help?

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  • What is casper rw loop file and why do I need it to make saving persistant on usb flash drive?

    - by l245c4l
    Suppose I've installed linux on my flash drive. Why do I need something like casper loop file to make saving persistant? So files are being erased? Isn't flash drive the same as actual hard drive? I'm linux noob so be patient. Or it is because linux on flash drive is actually live cd on flash drive? Can it be installed just like it is installed on hard drive? Thanks in advance

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  • Django: Summing values of records grouped by foreign key

    - by Dan0
    Hi there In django, given the following models (slightly simplified), I'm struggling to work out how I would get a view including sums of groups class Client(models.Model): api_key = models.CharField(unique=True, max_length=250, primary_key=True) name = models.CharField(unique=True, max_length=250) class Purchase(models.Model): purchase_date = models.DateTimeField() client = models.ForeignKey(SavedClient, to_field='api_key') amount_to_invoice = models.FloatField(null=True) For a given month, I'd like to see e.g. April 2010 For Each Client that purchased this month: * CLient: Name * Total amount of Purchases for this month * Total cost of purchases for this month For each Purchase made by client: * Date * Amount * Etc I've been looking into django annotation, but can't get my head around how to sum values of a field for a particular group over a particular month and send the information to a template as a variable/tag. Any info would be appreciated

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  • Exporting to CSV with dynamic field type handling

    - by serhio
    I have to do an export from DB to CSV. field; fileld; field... etc Have 3 types of fields: Alpha, Numeric and Bool respresented as "alphaValue",intValue and True/False. I try to encapsulate this in a fields collection, in order to export if alpha then set "", if Bool=True/False if numeric let as is. and try to build a CsvField class: Public Structure?Class CsvField(Of T As ???) End Structure Enum FieldType Alpha Bool Numeric End Enum any suggestions welcomed.

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  • Web page looks good in Firefox but every other browser hates it

    - by MrEnder
    I am trying to make my own website and it was coming along quite nicely. It looked beautiful in Firefox when opened and worked wonderfully. But then I run it in any other browser and it does not work. How can I fix this? Interner Explorer especially hates it =[ You just got to see it to know what I'm talking about so here is the link: http://opentech.durhamcollege.ca/~intn2201/brittains/chatter/ Please give solutions that don't involve JavaScript.

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  • is there a way to generate pdf containing non-ascii symbols with pisa from django template?

    - by mihailt
    Hi. i'm trying to generate a pdf from template using this snippet: def write_pdf(template_src, context_dict): template = get_template(template_src) context = Context(context_dict) html = template.render(context) result = StringIO.StringIO() pdf = pisa.pisaDocument(StringIO.StringIO(html.encode("UTF-8")), result) if not pdf.err: return http.HttpResponse(result.getvalue(), mimetype='application/pdf') except Exception('PDF error') but all non-latin symbols are not showing correctly, the template and view are saved using utf-8 encoding. i've tried saving view as ANSI and then to user unicode(html,"UTF-8"), but it throws TypeError. Also i thought that maybe it's because the default fonts somehow do not support utf-8 so according to pisa documentation i tried to set fontface in template body in style section. that still gave no results. Does any one have some ideas how to solve this issue?

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  • Position a UIView at the middle of a UITableView with CGRectZero frame

    - by Thomas Joulin
    Hi, I have a UITableViewController view a UITableView that I alloc/init with a frame of CGRectZero : self.tableView = [[UITableView alloc] initWithFrame:CGRectZero style:UITableViewStyleGrouped]; I want to add a view at the middle of the tableView (a loading view with a UIActivityIndicatorView and a UILabel), but I don't know how to position it, since I don't know the tableView frame. x = (self.tableview.frame.size.width - loadingView.frame.size.width) / 2.0; y = (self.tableview.frame.size.height - loadingView.frame.size.height) / 2.0; [loadingView setCenter:CGPointMake(x, y)]; I did init my tableView with CGRectZero frame so it can take the whole place available on screen (which it did), but I thought its frame would update or something. Any ideas ? Thanks !

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  • GridView row remove and animation - Android

    - by Pria
    I have a GridView in which each row has a custom view. The grid view adapter has an array that keeps the custom view. At click of a button, I want to remove a specific row from the Grid and while doing so I want animation on it. I have an AnimationListener. When I remove the upper most row from the array and setAdapter in onAnimationEnd(). It works perfectly fine. But, when I remove any other row, it gives a NullPointerException in the main thread. The exception thread is as follows: ERROR/AndroidRuntime(11503): java.lang.NullPointerException at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1227) at android.widget.AbsListView.dispatchDraw(AbsListView.java:1319) at android.view.View.draw(View.java:5944) at android.widget.AbsListView.draw(AbsListView.java:2121) at android.view.ViewGroup.drawChild(ViewGroup.java:1486) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1228) at android.view.View.draw(View.java:5841) at android.widget.FrameLayout.draw(FrameLayout.java:352) at android.view.ViewGroup.drawChild(ViewGroup.java:1486) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1228) at android.view.View.draw(View.java:5841) at android.widget.FrameLayout.draw(FrameLayout.java:352) at android.view.ViewGroup.drawChild(ViewGroup.java:1486) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1228) at android.view.View.draw(View.java:5841) at android.widget.FrameLayout.draw(FrameLayout.java:352) at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:1847) at android.view.ViewRoot.draw(ViewRoot.java:1217) at android.view.ViewRoot.performTraversals(ViewRoot.java:1030) at android.view.ViewRoot.handleMessage(ViewRoot.java:1482) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:123) at android.app.ActivityThread.main(ActivityThread.java:3948) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:521) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:782) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:540) at dalvik.system.NativeStart.main(Native Method) Please help!!!

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  • Is it acceptable to wrap PHP library functions solely to change the names?

    - by Carson Myers
    I'm going to be starting a fairly large PHP application this summer, on which I'll be the sole developer (so I don't have any coding conventions to conform to aside from my own). PHP 5.3 is a decent language IMO, despite the stupid namespace token. But one thing that has always bothered me about it is the standard library and its lack of a naming convention. So I'm curious, would it be seriously bad practice to wrap some of the most common standard library functions in my own functions/classes to make the names a little better? I suppose it could also add or modify some functionality in some cases, although at the moment I don't have any examples (I figure I will find ways to make them OO or make them work a little differently while I am working). If you saw a PHP developer do this, would you think "Man, this is one shoddy developer?" Additionally, I don't know much (or anything) about if/how PHP is optimized, and I know that usually PHP performace doesn't matter. But would doing something like this have a noticeable impact on the performance of my application?

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  • Guidance related to Paypal Integration Using Codeigniter

    - by anum
    I need some guidance related to Paypal Integration. Its not similar to regular cart. After checkout, the site offers a form for payment option, either its paypal or some other payment process. The form directs to controller after submit. A array exists which contains all items value, from here on how can I proceed to paypal site. How can I do this?

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  • Simple Python Challenge: Fastest Bitwise XOR on Data Buffers

    - by user213060
    Challenge: Perform a bitwise XOR on two equal sized buffers. The buffers will be required to be the python str type since this is traditionally the type for data buffers in python. Return the resultant value as a str. Do this as fast as possible. The inputs are two 1 megabyte (2**20 byte) strings. The challenge is to substantially beat my inefficient algorithm using python or existing third party python modules (relaxed rules: or create your own module.) Marginal increases are useless. from os import urandom from numpy import frombuffer,bitwise_xor,byte def slow_xor(aa,bb): a=frombuffer(aa,dtype=byte) b=frombuffer(bb,dtype=byte) c=bitwise_xor(a,b) r=c.tostring() return r aa=urandom(2**20) bb=urandom(2**20) def test_it(): for x in xrange(1000): slow_xor(aa,bb)

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  • PoptorootViewController fails then removes all Viewcontrollers

    - by Spyker
    Trying to fix a very strange error, i have 3 view controllers that start from the app delegate and push each other accordingly. The 3rd view controller then has a toolbar button that calls the code here: -(void)showEventBrowser; { accelManeger.delegate = nil; NSLog(@"%u",[self.navigationController.viewControllers count]); [self.navigationController popToRootViewControllerAnimated:NO]; } This works the first time round but when i come back to this view controller and try again. Firstly it reports that there are 3 view controllers on the stack. It then deallocs the 2nd view controller in the stack and doesnt crash but will not go any further. If i hit the button again it says there are no view controllers on the stack and fails to respond. I have logs for all the viewdid, viewwill, e.t.c in each view controller and there appears to be no odd behaviour. Also no memory warnings from any view controllers. Why would this work once through but not the second time ?

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  • Wire the homepage so that it fires off a Push notification message to my iPhone every time someone l

    - by fwd4
    I looking for a simple way to wire the homepage of my website so that it fires off a Push notification message to my iPhone every time someone lands on the page (just visiting in their browser). I'm aware this could become annoying! I currently send regular notifications to my iPhone using cron and curl to check sites / RSS feeds for change and then fire to to the Prowl API who in turn send it to my iPhone - like so: curl https://prowl.weks.net/publicapi/add -F apikey=$apikey -F priority=$priority -F application="$app" -F event="$eventname" -F description="$description" Could I do something similar from with the HTML of the homepage - call a script on my server which in turn fires a similar curl request above? Maybe with Javascript or PHP? Ideally I'd like the loading and rendering of me webpage to be uninterrupted by the call. Hat tip to Prowl - http://prowl.weks.net/api.php and to flx.me Both of which I use to make what I have already working.

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  • Why does Windows 7 need hardware virtualization to run XP mode?

    - by Ken Pespisa
    I have a MacBook Pro and I've run VMware Fusion's unity mode and Parallels' cohesion mode along side the Mac OS X, and both work pretty seamlessly. I figured XP Mode in Windows 7 would be something similar, but I then learned my machine requires hardware virtualization support, which it does not have. My machine is an HP dc7800. That's a dual core 2.2GHz machine with 4GBs of RAM. Certainly it has the horsepower to run a virtual environment alongside the primary OS. I'm wondering: 1) Why Microsoft decided to make hardware virtualization a requirement and 2) What am I missing? Is the experience similar to Parallel's cohesion mode / Fusion's unity mode? Thanks!

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  • Double buffering with C# has negative effect

    - by Roland Illig
    I have written the following simple program, which draws lines on the screen every 100 milliseconds (triggered by timer1). I noticed that the drawing flickers a bit (that is, the window is not always completely blue, but some gray shines through). So my idea was to use double-buffering. But when I did that, it made things even worse. Now the screen was almost always gray, and only occasionally did the blue color come through (demonstrated by timer2, switching the DoubleBuffered property every 2000 milliseconds). What could be an explanation for this? using System; using System.Drawing; using System.Windows.Forms; namespace WindowsFormsApplication1 { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void Form1_Paint(object sender, PaintEventArgs e) { Graphics g = CreateGraphics(); Pen pen = new Pen(Color.Blue, 1.0f); Random rnd = new Random(); for (int i = 0; i < Height; i++) g.DrawLine(pen, 0, i, Width, i); } // every 100 ms private void timer1_Tick(object sender, EventArgs e) { Invalidate(); } // every 2000 ms private void timer2_Tick(object sender, EventArgs e) { DoubleBuffered = !DoubleBuffered; this.Text = DoubleBuffered ? "yes" : "no"; } } }

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  • .net mvc pass dictionary data from view to controller

    - by Wei Ma
    A while ago, I was trying to pass a dictionary data from my view to my controller. And I was able to do so after googling on the net(remember it was one of scott hanselman's posts). The solution I had was something like <%for(int index=0; index<Model.Count(); index++){ var property= Model.ElementAt(index);%> <input type="hidden" name="<%="properties["+index+"].Key"%>"/> <input type="hidden" name="<%="properties["+index+"].Value"%>"/> <%}%> public ActionResult Process(IDictionary<string,string> properties) { doSomething(); return View(); } The code worked for awhile and then I did some refactoring and got rid of this chunk of code. Today, I ran into a situation in which I would like to pass a dictionary again. But no matter how hard I try, the properties parameter received by the action was always null. I tried the above code and <%for(int index=0; index<Model.Count(); index++){ var property= Model.ElementAt(index);%> <input type="hidden" name="<%="properties.Keys["+index+"]"%>"/> <input type="hidden" name="<%="properties.Values["+index+"]"%>"/> <%}%> Neither code worked. I googled again but couldn't find the post that helped me before. Can someone point out what I did wrong? thanks a million.

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  • Quickly read pgm header with comments in C

    - by Vi
    Quickly write PGM header is fprintf(f, "P5 %d %d 255\n", width, height); Quickly read PGM header is fscanf(f, "P5%d%d%*d\n"); // now can read the data from f, but it fails when the header contains comments (like if saved by GIMP). How to read PGM header in more compatible way (without a lot of code or extra dependencies, I don't want my program to cease being oneliner because of this)?

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  • How to convert Date format

    - by vinay_rockin
    Hi All, I have "Friday, April 02, 2010" as date now I want to display "04/02/2010" if browser language is selected english and "02.04.2010" if browser language is selected as German. All I want, is to display the date as per the browser format. Any Idea how this can be done?

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  • JSF command button attribute is transferred incorrectly

    - by Oleg Rybak
    I have following code in jsf page, backed by jsf managed bean <h:dataTable value="#{poolBean.pools}" var="item"> <h:column> <f:facet name="header"> <h:outputLabel value="Id"/> </f:facet> <h:outputText value="#{item.id}"/> </h:column> <h:column> <f:facet name="header"> <h:outputLabel value="Start Range"/> </f:facet> <h:inputText value="#{item.startRange}" required="true"/> </h:column> <h:column> <f:facet name="header"> <h:outputText value="End Range"/> </f:facet> <h:inputText value="#{item.endRange}" required="true"/> </h:column> <h:column> <f:facet name="header"> <h:outputText value="Pool type"/> </f:facet> <h:selectOneMenu value="#{item.poolType}" required="true"> <f:selectItems value="#{poolBean.poolTypesMenu}"/> </h:selectOneMenu> </h:column> <h:column> <f:facet name="header"/> <h:commandButton id="ModifyPool" actionListener="#{poolBean.updatePool}" image="img/update.gif" title="Modify Pool"> <f:attribute name="pool" value="#{item}"/> </h:commandButton> </h:column> </h:dataTable> This code fragment is dedicated to editing come collection of items. Each row of the table contains "edit" button that submits changed values of the row to the server. It has the item itself as an attribute. Submit is performed by calling actionListener method in the backing managed bean. This code runs correctly on Glassfish v 2.1 But when the server was updated to Glassfish v 2.1.1, the attribute stopped to be passed correctly. Instead of passing edited item (when we change the values in table row, we are actually changing the underlying object fields), the source item is submitted to server, i.e. the item that was previously given to the page. All the changes that were made on the page are discarded. I tried to update jsf version from 1.2_02 to 1.2_14 (we are using jsf RI), but it had no effect. Perhaps anyone came across the same problem? Any help and suggestions will be appreciated.

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