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• ASP.NET MVC 2 InputExtensions different on server than local machine

  - by Mike

  Hi everyone, So this is kind of a crazy problem to me, but I've had no luck Googling it. I have an ASP.NET MVC 2 application (under .NET 4.0) running locally just fine. When I upload it to my production server (under shared hosting) I get Compiler Error Message: CS1061: 'System.Web.Mvc.HtmlHelper' does not contain a definition for 'TextBoxFor' and no extension method 'TextBoxFor' accepting a first argument of type 'System.Web.Mvc.HtmlHelper' could be found (are you missing a using directive or an assembly reference?) for this code: <%= this.Html.TextBoxFor(person => person.LastName) %> This is one of the new standard extension methods in MVC 2. So I wrote some diagnostic code: System.Reflection.Assembly ass = System.Reflection.Assembly.GetAssembly(typeof(InputExtensions)); Response.Write("From GAC: " + ass.GlobalAssemblyCache.ToString() + "<br/>"); Response.Write("ImageRuntimeVersion: " + ass.ImageRuntimeVersion.ToString() + "<br/>"); Response.Write("Version: " + System.Diagnostics.FileVersionInfo.GetVersionInfo(ass.Location).ToString() + "<br/>"); foreach (var method in typeof(InputExtensions).GetMethods()) { Response.Write(method.Name + "<br/>"); } running locally (where it works fine), I get this as output: From GAC: True ImageRuntimeVersion: v2.0.50727 Version: File: C:\Windows\assembly\GAC_MSIL\System.Web.Mvc\2.0.0.0__31bf3856ad364e35\System.Web.Mvc.dll InternalName: System.Web.Mvc.dll OriginalFilename: System.Web.Mvc.dll FileVersion: 2.0.50217.0 FileDescription: System.Web.Mvc.dll Product: Microsoft® .NET Framework ProductVersion: 2.0.50217.0 Debug: False Patched: False PreRelease: False PrivateBuild: False SpecialBuild: False Language: Language Neutral CheckBox CheckBox CheckBox CheckBox CheckBox CheckBox CheckBoxFor CheckBoxFor CheckBoxFor Hidden Hidden Hidden Hidden HiddenFor HiddenFor HiddenFor Password Password Password Password PasswordFor PasswordFor PasswordFor RadioButton RadioButton RadioButton RadioButton RadioButton RadioButton RadioButtonFor RadioButtonFor RadioButtonFor TextBox TextBox TextBox TextBox TextBoxFor TextBoxFor TextBoxFor ToString Equals GetHashCode GetType and when running on the production server (where it fails), I see: From GAC: True ImageRuntimeVersion: v2.0.50727 Version: File: C:\Windows\assembly\GAC_MSIL\System.Web.Mvc\2.0.0.0__31bf3856ad364e35\System.Web.Mvc.dll InternalName: System.Web.Mvc.dll OriginalFilename: System.Web.Mvc.dll FileVersion: 2.0.41001.0 FileDescription: System.Web.Mvc.dll Product: Microsoft® .NET Framework ProductVersion: 2.0.41001.0 Debug: False Patched: False PreRelease: False PrivateBuild: False SpecialBuild: False Language: Language Neutral CheckBox CheckBox CheckBox CheckBox CheckBox CheckBox Hidden Hidden Hidden Hidden Hidden Hidden Password Password Password Password RadioButton RadioButton RadioButton RadioButton RadioButton RadioButton TextBox TextBox TextBox TextBox ToString Equals GetHashCode GetType note that "TextBoxFor" is not present (hence the error). I have MVC referenced in the csproj: <Reference Include="System.Web.Mvc, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL"> <SpecificVersion>True</SpecificVersion> <HintPath>References\System.Web.Mvc.dll</HintPath> <Private>True</Private> </Reference> I just can't figure it what to do next. Thoughts? Thanks! -Mike

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• struts2 invalid.token returned when form submitted using JQuery

  - by John

  Hi, I have inherited some code in which I now have to add CSRF prevention and am trying to use the struts2 tokenSession interceptor to do this. I am adding a token to my form using the struts2 token tag like so: <form id="updateObject" name="updateObject" action="<%=request.getContextPath()%>/prv/updateObject.action" method="POST"> <fieldset class="x-fieldset"> <legend>Update object - Action Required</legend> <div>...</div> <s:token /> <s:hidden name="id" id="objectId" /> more stuff here... <input type="submit" value="Update Object" onclick="javascript:return doUpdateObject('myAction');"/> </fieldset> </form> In my javascript function, I am adding/removing some validation rules (depending upon the action required, and submitting the form: function doUpdateObject(action){ actionPanel.registerAction(action); // this function places the action name in an in-scope variable doUpdateObjectValidationSetup(action); // this function adds/removes jquery validation rules depending upon the action if($("#updateObject").valid()){ $("form#updateObject").submit(); } return false; } I have intercepted the request and a token is being added, however the struts2 tokenSession interceptor is returning invalid.token. The code works as expected without this interceptor. (struts2 xml file not posted - will post the relevant section if required). I have also used the tokenSession interceptor in other pages which use a basic html submit button (i.e. not going via javascript or jquery) and this also works as expected. What is making the token invalid? N.B. The project I have inherited uses a strange mixture of standard html, struts2 tags, ExtJS and JQuery. I will clean this up at some point but at the moment I just need to get the tokenSession interceptor working asap in the code as-is (as I have to apply a similar fix to several hundred pages...). Any help/pointers/tips/etc greatly appreciated! Regards, John

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• Using PHP substr() and strip_tags() while retaining formatting and without breaking HTML

  - by Peter

  I have various HTML strings to cut to 100 characters (of the stripped content, not the original) without stripping tags and without breaking HTML. Original HTML string (288 characters): $content = "<div>With a <span class='spanClass'>span over here</span> and a <div class='divClass'>nested div over <div class='nestedDivClass'>there</div> </div> and a lot of other nested <strong><em>texts</em> and tags in the air <span>everywhere</span>, it's a HTML taggy kind of day.</strong></div>"; Standard trim: Trim to 100 characters and HTML breaks, stripped content comes to ~40 characters: $content = substr($content, 0, 100)."..."; /* output: <div>With a <span class='spanClass'>span over here</span> and a <div class='divClass'>nested div ove... */ Stripped HTML: Outputs correct character count but obviously looses formatting: $content = substr(strip_tags($content)), 0, 100)."..."; /* output: With a span over here and a nested div over there and a lot of other nested texts and tags in the ai... */ Partial solution: using HTML Tidy or purifier to close off tags outputs clean HTML but 100 characters of HTML not displayed content. $content = substr($content, 0, 100)."..."; $tidy = new tidy; $tidy->parseString($content); $tidy->cleanRepair(); /* output: <div>With a <span class='spanClass'>span over here</span> and a <div class='divClass'>nested div ove</div></div>... */ Challenge: To output clean HTML and n characters (excluding character count of HTML elements): $content = cutHTML($content, 100); /* output: <div>With a <span class='spanClass'>span over here</span> and a <div class='divClass'>nested div over <div class='nestedDivClass'>there</div> </div> and a lot of other nested <strong><em>texts</em> and tags in the ai</strong></div>..."; Similar Questions How to clip HTML fragments without breaking up tags Cutting HTML strings without breaking HTML tags

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• Django: What's an awesome plugin to maintain images in the admin?

  - by meder

  I have an articles entry model and I have an excerpt and description field. If a user wants to post an image then I have a separate ImageField which has the default standard file browser. I've tried using django-filebrowser but I don't like the fact that it requires django-grappelli nor do I necessarily want a flash upload utility - can anyone recommend a tool where I can manage image uploads, and basically replace the file browse provided by django with an imagepicking browser? In the future I'd probably want it to handle image resizing and specify default image sizes for certain article types. Edit: I'm trying out adminfiles now but I'm having issues installing it. I grabbed it and added it to my python path, added it to INSTALLED_APPS, created the databases for it, uploaded an image. I followed the instructions to modify my Model to specify adminfiles_fields and registered but it's not applying in my admin, here's my admin.py for articles: from django.contrib import admin from django import forms from articles.models import Category, Entry from tinymce.widgets import TinyMCE from adminfiles.admin import FilePickerAdmin class EntryForm( forms.ModelForm ): class Media: js = ['/media/tinymce/tiny_mce.js', '/media/tinymce/load.js']#, '/media/admin/filebrowser/js/TinyMCEAdmin.js'] class Meta: model = Entry class CategoryAdmin(admin.ModelAdmin): prepopulated_fields = { 'slug': ['title'] } class EntryAdmin( FilePickerAdmin ): adminfiles_fields = ('excerpt',) prepopulated_fields = { 'slug': ['title'] } form = EntryForm admin.site.register( Category, CategoryAdmin ) admin.site.register( Entry, EntryAdmin ) Here's my Entry model: class Entry( models.Model ): LIVE_STATUS = 1 DRAFT_STATUS = 2 HIDDEN_STATUS = 3 STATUS_CHOICES = ( ( LIVE_STATUS, 'Live' ), ( DRAFT_STATUS, 'Draft' ), ( HIDDEN_STATUS, 'Hidden' ), ) status = models.IntegerField( choices=STATUS_CHOICES, default=LIVE_STATUS ) tags = TagField() categories = models.ManyToManyField( Category ) title = models.CharField( max_length=250 ) excerpt = models.TextField( blank=True ) excerpt_html = models.TextField(editable=False, blank=True) body_html = models.TextField( editable=False, blank=True ) article_image = models.ImageField(blank=True, upload_to='upload') body = models.TextField() enable_comments = models.BooleanField(default=True) pub_date = models.DateTimeField(default=datetime.datetime.now) slug = models.SlugField(unique_for_date='pub_date') author = models.ForeignKey(User) featured = models.BooleanField(default=False) def save( self, force_insert=False, force_update= False): self.body_html = markdown(self.body) if self.excerpt: self.excerpt_html = markdown( self.excerpt ) super( Entry, self ).save( force_insert, force_update ) class Meta: ordering = ['-pub_date'] verbose_name_plural = "Entries" def __unicode__(self): return self.title Edit #2: To clarify I did move the media files to my media path and they are indeed rendering the image area, I can upload fine, the <<<image>>> tag is inserted into my editable MarkItUp w/ Markdown area but it isn't rendering in the MarkItUp preview - perhaps I just need to apply the |upload_tags into that preview. I'll try adding it to my template which posts the article as well.

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• WPF Converter and NotifyOnTargetUpdated exclusive in a binding ?

  - by Mathieu Garstecki

  Hi, I have a problem with a databinding in WPF. When I try to use a value converter and set the NotifyOnTargetUpdated=True property to True, I get an XamlParseException with the following message: 'System.Windows.Data.BindingExpression' value cannot be assigned to property 'Contenu' of object 'View.UserControls.ShadowedText'. Value cannot be null. Parameter name: textToFormat Error at object 'System.Windows.Data.Binding' in markup file 'View.UserControls;component/saletotal.xaml' Line 363 Position 95. The binding is pretty standard: <my:ShadowedText Contenu="{Binding Path=Total, Converter={StaticResource CurrencyToStringConverter}, NotifyOnTargetUpdated=True}" TargetUpdated="MontantTotal_TargetUpdated"> </my:ShadowedText> (Styling properties removed for conciseness) The converter exists in the resources and works correctly when NotifyOnTargetUpdated=True is removed. Similarly, the TargetUpdated event is called and implemented correctly, and works when the converter is removed. Note: This binding is defined in a ControlTemplate, though I don't think that is relevant to the problem. Can anybody explain me what is happening ? Am I defining the binding wrong ? Are those features mutually exclusive (and in this case, can you explain why it is so) ? Thanks in advance. More info: Here is the content of the TargetUpdated handler: private void MontantTotal_TargetUpdated(object sender, DataTransferEventArgs e) { ShadowedText textBlock = (ShadowedText)e.TargetObject; double textSize = textBlock.Taille; double delta = 5; double defaultTaille = 56; double maxWidth = textBlock.MaxWidth; while (true) { FormattedText newFormat = new FormattedText(textBlock.Contenu, CultureInfo.CurrentCulture, FlowDirection.LeftToRight, new Typeface("Calibri"), textSize, (SolidColorBrush) Resources["RougeVif"]); if (newFormat.Width < textBlock.MaxWidth && textSize <= defaultTaille) { if ((Math.Round(newFormat.Width) + delta) >= maxWidth || textSize == defaultTaille) { break; } textSize++; } else { if ((Math.Round(newFormat.Width) - delta) <= maxWidth && textSize <= defaultTaille) { break; } textSize--; } } textBlock.Taille = textSize; } The role of the handler is to resize the control based on the length of the content. It is quite ugly but I want to have the functional part working before refactoring.

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• Session Id in url and/or cookie? [closed]

  - by Jacco

  Most people advice against rewriting every (internal) url to include the sessionId (both GET and POST). The standard argument against it seems to be:   If an attacker gets hold of the sessionId, they can hijack the session.   With the sessionId in the url, it easily leaks to the attacker (by referer etc.) But what if you put the sessionId in both an (encrypted) cookie and the url. if the sessionId in either the cookie or the url is missing or if they do not match, decline the request. Let's pretend the website in question is free of xss holes, the cookie encryption is strong enough, etc. etc. Then what is the increased risk of rewriting every url to include the sessionId? UPDATE: @Casper That is a very good point. so up to now there are 2 reasons: bad for search engines / SEO if used in public part of the website can cause trouble when users post an url with a session Id on a forum, send it trough email or bookmark the page apart from the:   It increases the security risk, but it is not clear what the increased risk is. some background info: I've a website that offers blog-like service to travellers. I cannot be sure cookies work nor can I require cookies to work. Most computers in internet cafes are old and not (even close to) up-to-date. The user has no control over them and the connection can be very unreliable for some more 'off the beaten path' locations. Binding the session to an IP-address is not possible, some places use load-balancing proxies with multiple IP addresses. (and from China there is The Great Firewall). Upon receiving the first cookie back, I flag cookies as mandatory. However, if the cookie was flagged as mandatory but not there, I ask for their password once more, knowing their session from the url. (Also cookies have a 1 time token in them, but that's not the point of this question). UPDATE 2: The conclusion seems to be that there are no extra *security* issues when you expose you session id trough the URL while also keeping a copy of the session id in an encrypted cookie. Do not hesitate to add additional information about any possible security implications

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• How do HttpOnly cookies work with AJAX requests?

  - by Shawn Simon

  JavaScript needs access to cookies if AJAX is used on a site with access restrictions based on cookies. Will HttpOnly cookies work on an AJAX site? Edit: Microsoft created a way to prevent XSS attacks by disallowing JavaScript access to cookies if HttpOnly is specified. FireFox later adopted this. So my question is: If you are using AJAX on a site, like StackOverflow, are Http-Only cookies an option? Edit 2: Question 2. If the purpose of HttpOnly is to prevent JavaScript access to cookies, and you can still retrieve the cookies via JavaScript through the XmlHttpRequest Object, what is the point of HttpOnly? Edit 3: Here is a quote from Wikipedia: When the browser receives such a cookie, it is supposed to use it as usual in the following HTTP exchanges, but not to make it visible to client-side scripts.[32] The HttpOnly flag is not part of any standard, and is not implemented in all browsers. Note that there is currently no prevention of reading or writing the session cookie via a XMLHTTPRequest. [33]. I understand that document.cookie is blocked when you use HttpOnly. But it seems that you can still read cookie values in the XMLHttpRequest object, allowing for XSS. How does HttpOnly make you any safer than? By making cookies essentially read only? In your example, I cannot write to your document.cookie, but I can still steal your cookie and post it to my domain using the XMLHttpRequest object. <script type="text/javascript"> var req = null; try { req = new XMLHttpRequest(); } catch(e) {} if (!req) try { req = new ActiveXObject("Msxml2.XMLHTTP"); } catch(e) {} if (!req) try { req = new ActiveXObject("Microsoft.XMLHTTP"); } catch(e) {} req.open('GET', 'http://beta.stackoverflow.com/', false); req.send(null); alert(req.getAllResponseHeaders()); </script> Edit 4: Sorry, I meant that you could send the XMLHttpRequest to the StackOverflow domain, and then save the result of getAllResponseHeaders() to a string, regex out the cookie, and then post that to an external domain. It appears that Wikipedia and ha.ckers concur with me on this one, but I would love be re-educated... Final Edit: Ahh, apparently both sites are wrong, this is actually a bug in FireFox. IE6 & 7 are actually the only browsers that currently fully support HttpOnly. To reiterate everything I've learned: HttpOnly restricts all access to document.cookie in IE7 & and FireFox (not sure about other browsers) HttpOnly removes cookie information from the response headers in XMLHttpObject.getAllResponseHeaders() in IE7. XMLHttpObjects may only be submitted to the domain they originated from, so there is no cross-domain posting of the cookies. edit: This information is likely no longer up to date.

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• Android Mediaplayer: setDataSource issue for downloaded media file

  - by Erik

  I have an application that will record and play audio files. Some of the audio files are downloaded using simple standard http downloads using httpclient. It worked like a charm for a long time. Now all of a sudden I cannot play the files I download. It fails with this stack. I store the files on the SDCard and I experience the problem both on a handset and a USB connected device. I have checked that the downloaded file is cool on the server, and I can play it without any issues. These are the code snippets I use ( I know that recordingFile is a valid path for the file). // inside the activity class private void playRecording() throws IOException{ File recordingFile = new File(recordingFileName); FileInputStream recordingInputStream = new FileInputStream(recordingFile); audioMediaPlayer.playAudio(recordingInputStream); } Here is the media player code: // inside my media player class which handles the recordings public void playAudio(FileInputStream audioInputStream) throws IOException { mediaPlayer.reset(); mediaPlayer.setDataSource(audioInputStream.getFD()); mediaPlayer.prepare(); mediaPlayer.start(); } Here is the exception: E/MediaPlayerService( 555): offset error E/MediaPlayer( 786): Unable to to create media player W/System.err( 786): java.io.IOException: setDataSourceFD failed.: status=0x80000000 W/System.err( 786): at android.media.MediaPlayer.setDataSource(Native Method) W/System.err( 786): at android.media.MediaPlayer.setDataSource(MediaPlayer.java:632) W/System.err( 786): at net.xxx.xxx.AudioMediaPlayer.playAudio(AudioMediaPlayer.java:69) W/System.err( 786): at net.xxx.xxx.Downloads.playRecording(Downloads.java:299) W/System.err( 786): at net.xxx.xxx.Downloads.access$0(Downloads.java:294) W/System.err( 786): at net.xxx.xxx.Downloads$1.onClick(Downloads.java:135) I have tried seeking some answer of the offset error, but not really clear what this issue might be. PS I download the file with this code: public FileOutputStream executeHttpGet(FileOutputStream fileOutputStream) throws ClientProtocolException, IOException{ try { // Execute HTTP Post Request httpResponse = httpClient.execute(httpPost, localContext); int status = httpResponse.getStatusLine().getStatusCode(); // we assume that the response body contains the error message if (status != HttpStatus.SC_OK) { ByteArrayOutputStream ostream = new ByteArrayOutputStream(); httpResponse.getEntity().writeTo(ostream); fileOutputStream = null; } else { InputStream content = httpResponse.getEntity().getContent(); byte[] buffer = new byte[1024]; int len = 0; while ( (len = content.read(buffer)) > 0 ) { fileOutputStream.write(buffer,0, len); } fileOutputStream.close(); content.close(); // this will also close the connection } } catch (ClientProtocolException e1) { // TODO Auto-generated catch block e1.printStackTrace(); fileOutputStream = null; } catch (IOException e2) { // TODO Auto-generated catch block e2.printStackTrace(); fileOutputStream = null; } return fileOutputStream; }

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• Specifying Android project dependencies (in Eclipse)

  - by Henrik Gustafsson

  I have two Android projects, a 'library project' containing a custom layout, and an 'application project' containing an application which uses the layout. Everything seems to build and execute fine, except that the visual layout editor throws a ClassNotFoundException (which I assume is a bug in the plug-in), but when I try to start to make use of the attributes I defined for the custom layout in the xml, I can no longer build. That is; this works: <?xml version="1.0" encoding="utf-8"?> <se.fnord.android.layout.PredicateLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="asdfasdf" /> </se.fnord.android.layout.PredicateLayout> Whereas this does not: <?xml version="1.0" encoding="utf-8"?> <se.fnord.android.layout.PredicateLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:fnord="http://schemas.android.com/apk/res/se.fnord.android" android:layout_width="fill_parent" android:layout_height="fill_parent"> <TextView fnord:layout_horizontalSpacing="1px" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="asdfasdf" /> </se.fnord.android.layout.PredicateLayout> The build fails with a message from aapt: ERROR No resource identifier found for attribute 'layout_horizontalSpacing' in package 'se.fnord.android' The resource identifier does exist in the R-file and attrs.xml contained the library project, and if I put the layout code and resources directly in the application project everything works fine. The layout_horizontalSpacing attribute (and layout_verticalSpacing) is a custom attribute used in the PredicateLayout.LayoutParam class to specify the distance to the next widget. So far I've tried the standard eclipse ways by specifying project references and build path project dependencies. I was also told to try the tag in the application manifest, which did not help. So, what do I need to do for the references in the xml-file to work? I don't know if it's relevant, but the 'library' manifest looks like this: <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="se.fnord.android" android:versionCode="1" android:versionName="1.0.0"> </manifest> The 'application' manifest like this: <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="se.fnord.appname" android:versionCode="1" android:versionName="1.0.0"> <application android:icon="@drawable/icon" android:label="@string/app_name"> <activity android:name=".AppName" android:label="@string/app_name"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest> (The 'PredicateLayout', btw, is a cleaned-up version of this).

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• Unable to get node using xpath in soapUI

  - by R.S

  How can i access "AccountId" node from following response file using Xpath in soapUI 4.0.0? Thanks in advance. Response file is as follow, <s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/"> <s:Body> <GetResponse xmlns="http://www.tieto.com/cmw/tcm/account"> <GetResult xmlns:i="http://www.w3.org/2001/XMLSchema-instance"> <Account> <AccountId>14338049839</AccountId> <AccountLabel>Spara Femman</AccountLabel> <AccountRoleDTOList> <AccountRole> <AddressTypeId>REC</AddressTypeId> <EndDay i:nil="true"/> <ExtPosReference i:nil="true"/> <HolderId>10533</HolderId> <HolderName>TÄRNHOLMS HOTELL AB</HolderName> <HolderTypeId>COR</HolderTypeId> <IdentificationId>005164006917</IdentificationId> <ReportProfileId>3</ReportProfileId> <ReportProfileName>Standard</ReportProfileName> <RoleDocumentPath i:nil="true"/> <RoleId>HOL</RoleId> <RoleName>Holder</RoleName> <ShareOfAccount>100.00000</ShareOfAccount> </AccountRole> </AccountRoleDTOList> <AccountTypeId>AGG</AccountTypeId> <CloseDay i:nil="true"/> <CurrencyId>SEK</CurrencyId> <CustodianAccountId i:nil="true"/> I have tried it by using following code... but it's not working declare namespace i='http://www.w3.org/2001/XMLSchema-instance'; //i:GetResult[1]/Account[1] But i am getting error like, Missing content for xpath declare namespace i='http://www.w3.org/2001/XMLSchema-instance'; //i:GetResult[1]/Account[1] in response

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• JQuery dialog momentairly displayed on page load

  - by Kevin Won

  I created a page that has a JQuery based dialog using the standard JQuery UI function. I do this with out of the box functionality of JQuery... nothing special at all. Here is my HTML for the dialog: <div id = "myDialog"> <!-- ... more html in here for the dialog --> </div> Then the JQuery called in javascript that transforms the <div> to a dialog: // pruned .js as an example of kicking up a JQuery dialog $('#myDialog').dialog({ autoOpen: false, title: 'Title here', modal: true } }); Again, plain-vanilla JQuery. So you start this wizard by clicking on a link on the parent page, and it then spawns a JQuery dialog which has a significant chunk of HTML that includes images, etc. As I continued developing this page, I started to notice that when I loaded the page in the browser that the <div> tags I was putting in that JQuery transforms into dialogs would very briefly be displayed. Then the page would act as expected. In other words, the dialog would not be hidden, it would be displayed briefly in-line in the page. Quite ugly and unprofessional looking! But after a split second, the page would render correctly and look just as I expected/wanted. Over time, as the page size grew, the time the page would remain incorrectly rendered grew. My guess is that the rendering engine of the browser is rendering the page as it is loading, then at the end it is kicking off the JQuery that will transform the <div> into a dialog. This JQuery function will then transform the simple <div> to a JQuery dialog and hide it (since I have the autoOpen property set to false). Some browsers <cough>IE</cough> display it longer than others. My large-ish dialog now causes the page to incorrectly render for about 1 second... YUCK! I came up with a resolution to this problem which works OK, but I'm wondering if someone knows of a better way.

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• When constructing a Bitmap with Bitmap.FromHbitmap(), how soon can the original bitmap handle be del

  - by GBegen

  From the documentation of Image.FromHbitmap() at http://msdn.microsoft.com/en-us/library/k061we7x%28VS.80%29.aspx : The FromHbitmap method makes a copy of the GDI bitmap; so you can release the incoming GDI bitmap using the GDIDeleteObject method immediately after creating the new Image. This pretty explicitly states that the bitmap handle can be immediately deleted with DeleteObject as soon as the Bitmap instance is created. Looking at the implementation of Image.FromHbitmap() with Reflector, however, shows that it is a pretty thin wrapper around the GDI+ function, GdipCreateBitmapFromHBITMAP(). There is pretty scant documentation on the GDI+ flat functions, but http://msdn.microsoft.com/en-us/library/ms533971%28VS.85%29.aspx says that GdipCreateBitmapFromHBITMAP() corresponds to the Bitmap::Bitmap() constructor that takes an HBITMAP and an HPALETTE as parameters. The documentation for this version of the Bitmap::Bitmap() constructor at http://msdn.microsoft.com/en-us/library/ms536314%28VS.85%29.aspx has this to say: You are responsible for deleting the GDI bitmap and the GDI palette. However, you should not delete the GDI bitmap or the GDI palette until after the GDI+ Bitmap::Bitmap object is deleted or goes out of scope. Do not pass to the GDI+ Bitmap::Bitmap constructor a GDI bitmap or a GDI palette that is currently (or was previously) selected into a device context. Furthermore, one can see the source code for the C++ portion of GDI+ in GdiPlusBitmap.h that the Bitmap::Bitmap() constructor in question is itself a wrapper for the GdipCreateBitmapFromHBITMAP() function from the flat API: inline Bitmap::Bitmap( IN HBITMAP hbm, IN HPALETTE hpal ) { GpBitmap *bitmap = NULL; lastResult = DllExports::GdipCreateBitmapFromHBITMAP(hbm, hpal, &bitmap); SetNativeImage(bitmap); } What I can't easily see is the implementation of GdipCreateBitmapFromHBITMAP() that is the core of this functionality, but the two remarks in the documentation seem to be contradictory. The .Net documentation says I can delete the bitmap handle immediately, and the GDI+ documentation says the bitmap handle must be kept until the wrapping object is deleted, but both are based on the same GDI+ function. Furthermore, the GDI+ documentation warns against using a source HBITMAP that is currently or previously selected into a device context. While I can understand why the bitmap should not be selected into a device context currently, I do not understand why there is a warning against using a bitmap that was previously selected into a device context. That would seem to prevent use of GDI+ bitmaps that had been created in memory using standard GDI. So, in summary: Does the original bitmap handle need to be kept around until the .Net Bitmap object is disposed? Does the GDI+ function, GdipCreateBitmapFromHBITMAP(), make a copy of the source bitmap or merely hold onto the handle to the original? Why should I not use an HBITMAP that was previously selected into a device context?

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• Log4r : logger inheritance, yaml configuration, alternatives ?

  - by devlearn

  Hello, I'm pretty new to ruby environments and I was looking for a nice logging framework to use it my ruby and rails applications. In my previous experiences I have successfully used log4j and log4p (the perl port) and was expecting the same level of usability (and maturity) with log4r. However I must say that there are a number of things that are not clear at all in the log4r framework. 1 Logger Inheritance The logger inheritance does not seem to be managed at all ! If I declare a logger named 'myapp' and then try to get a logger name 'myapp::engine', the lookup will end with a NameError. I would expect that the framework returns the root logger according to the naming scheme and to use the 'myapp' logger. Q1 : Of course I can work around this and manage the names by myself with a lookup method, however is there a cleaner way to do this without any extra coding ? 2 YAML configuration Second thing that confuses me is the yaml configuration. On the log4r site there are literally no information about this system, the doc links forward to missing pages, so all the info I can find about is contained in the examples directory of the gem. I was pretty confused with the fact that the yaml configuration must contain the pre_config section, and that I need to define my own levels. If I remove the pre_config secion, or replace all the “custom” levels by the standard ones ( debug, info, warn, fatal ) , the example will throw the following error : log4r/yamlconfigurator.rb:68:in `decode_yaml': Log level must be in 0..7 (ArgumentError) So there seems to be no way of using a simple file where we only declare the loggers and appenders for the framework. Q2 : I realy think that I missed something and that must be a way of providing a simple yaml conf file. Do you have any examples of such an usage ? 3 Variables substitution in XML file Q3 : The Yaml configuration system seems to provide such a feature however I was unable to find a similar feature with XML files. Any ideas ? 4 Alternatives ? I must say that I'm very disappointed by the feature level and the maturity of log4r compared to the log4j and other log4j ports. I run into this framework with a solid background of logging APIs in other languages and find myself working around in all kinds just to make 'basic things' running in a “real world application”. By that I mean a complex application composed of several gems, console/scripting apps, and a rails web front end where the configuration must be mutualized and where we make intensive usage of namespaces and inheritance. I've run several searches in order to find something more suitable or mature, but did not find anything similar. Q4 : Do you guys know any (serious) alternatives to log4r framework that could be used in a enterprise class app ? Thanks reading all of this ! I'd really appreciate any pointers, Kind Regards,

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• IE7 relative/absolute positioning bug with dynamically modified page content

  - by Matthias Hryniszak

  Hi, I was wondering if there's anyone having an idea how to tackle with the following problem in IE7: <!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>IE7 absolute positioning bug</title> <style type="text/css"> #panel { position: relative; border: solid 1px black; } #spacer { height: 100px; } #footer { position: absolute; bottom: 0px; } </style> <script type="text/javascript"> function toggle() { var spacer = document.getElementById("spacer"); var style = "block"; if (spacer.style.display == "block" || spacer.style.display == "") { style = "none"; } spacer.style.display = style; } </script> </head> <body> <div id="panel"> <button onclick="toggle();">Click me</button> <br /><br /><br /> <div id="spacer"></div> <div id="footer">This is some footer</div> </div> </body> </html> When you run this in IE7 you'll see that the "footer" element stays after modifying the CSS for "panel". The same example tested in IE8, FF and Chrome behaves exactly as expected. I've already tried updating the element's class but this does not work if the browser's window has been opened maximized and no further size changes were made to the window (which is about 90% of the use cases we have for our product.... :( ) I'm stuck with a CSS-based solution however I think that I can make an exception in this case if it can easily be made IE7-specific (which means that other browsers will behave in a standard way with this). Please help!

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• gwt-RPC problem! what is the best practice on using gwt-RPC?

  - by guaz

  Dear all, I want draw a chart based on the date retrieve from the database by using RPC. But everytime I fail to get the result. My rpc function is working. I think is the sequence of the process. below is my class: public class TrafficPattern_1 extends GChart { TrafficPattern_1() { final DBServiceAsync dbService = GWT .create(DBService.class); dbService.SendData(null, null, new AsyncCallback<Container_TrafficPattern>() { @Override public void onFailure(Throwable caught) { } @Override public void onSuccess(Container_TrafficPattern result) { // TODO Auto-generated method stub pContainer.SetaDate(result.aDate.get(1)); } }); pContainer.aDate.get(0); setChartSize(350, 200); setChartTitle("<h2>Temperature vs Time<h2>"); setPadding("8px"); //setPixelSize(380, 200); getXAxis().setAxisLabel("<small><b><i>Time</i></b></small>"); getXAxis().setHasGridlines(true); getXAxis().setTickCount(6); // Except for "=(Date)", a standard GWT DateTimeFormat string getXAxis().setTickLabelFormat("=(Date)h:mm a"); getYAxis().setAxisLabel("<small><b><i>&deg;C</i></b></small>"); getYAxis().setHasGridlines(true); getYAxis().setTickCount(11); getYAxis().setAxisMin(11); getYAxis().setAxisMax(16); addCurve(); getCurve().setLegendLabel("<i> </i>"); getCurve().getSymbol().setBorderColor("blue"); getCurve().getSymbol().setBackgroundColor("blue"); // getCurve().getSymbol().setFillSpacing(10); // getCurve().getSymbol().setFillThickness(3); getCurve().getSymbol().setSymbolType(SymbolType.LINE); getCurve().getSymbol().setFillThickness(2); getCurve().getSymbol().setFillSpacing(1); for (int i = 0; i < dateSequence.length; i++) // Note that getTime() returns milliseconds since // 1/1/70--required whenever "date cast" tick label // formats (those beginning with "=(Date)") are used. getCurve().addPoint(dateSequence[i].date.getTime(), dateSequence[i].value); }

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• C++ visibility of privately inherited typedefs to nested classes

  - by beldaz

  First time on StackOverflow, so please be tolerant. In the following example (apologies for the length) I have tried to isolate some unexpected behaviour I've encountered when using nested classes within a class that privately inherits from another. I've often seen statements to the effect that there is nothing special about a nested class compared to an unnested class, but in this example one can see that a nested class (at least according to GCC 4.4) can see the public typedefs of a class that is privately inherited by the closing class. I appreciate that typdefs are not the same as member data, but I found this behaviour surprising, and I imagine many others would, too. So my question is threefold: Is this standard behaviour? (a decent explanation of why would be very helpful) Can one expect it to work on most modern compilers (i.e., how portable is it)? #include <iostream> class Base { typedef int priv_t; priv_t priv; public: typedef int pub_t; pub_t pub; Base() : priv(0), pub(1) {} }; class PubDerived : public Base { public: // Not allowed since Base::priv is private // void foo() {std::cout << priv << "\n";} class Nested { // Not allowed since Nested has no access to PubDerived member data // void foo() {std::cout << pub << "\n";} // Not allowed since typedef Base::priv_t is private // void bar() {priv_t x=0; std::cout << x << "\n";} }; }; class PrivDerived : private Base { public: // Allowed since Base::pub is public void foo() {std::cout << pub << "\n";} class Nested { public: // Works (gcc 4.4 - see below) void fred() {pub_t x=0; std::cout << x << "\n";} }; }; int main() { // Not allowed since typedef Base::priv_t private // std::cout << PubDerived::priv_t(0) << "\n"; // Allowed since typedef Base::pub_t is inaccessible std::cout << PubDerived::pub_t(0) << "\n"; // Prints 0 // Not allowed since typedef Base::pub_t is inaccessible //std::cout << PrivDerived::pub_t(0) << "\n"; // Works (gcc 4.4) PrivDerived::Nested o; o.fred(); // Prints 0 return 0; }

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• Android GridView with ads below

  - by ktambascio

  Hi, I'm trying to integrate ads (admob) into my Android app. It's mostly working, except for one issue with the layout. My layout consists of: <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" xmlns:app="http://schemas.android.com/apk/res/com.example.photos"> <LinearLayout android:orientation="horizontal" android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/status_layout"> <ImageView android:id="@+id/cardStatus" android:layout_width="wrap_content" android:layout_height="wrap_content" /> <TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/hello" android:id="@+id/cardStatusText" /> </LinearLayout> <GridView android:id="@+id/imageGridView" android:layout_width="fill_parent" android:layout_height="fill_parent" android:padding="10dp" android:verticalSpacing="10dp" android:horizontalSpacing="10dp" android:numColumns="auto_fit" android:columnWidth="100dp" android:stretchMode="columnWidth" android:gravity="center" android:layout_below="@id/status_layout" /> <!-- Place an AdMob ad at the bottom of the screen. --> <!-- It has white text on a black background. --> <!-- The description of the surrounding context is 'Android game'. --> <com.admob.android.ads.AdView android:id="@+id/ad" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_alignParentBottom="true" app:backgroundColor="#000000" app:primaryTextColor="#FFFFFF" app:secondaryTextColor="#CCCCCC" app:keywords="Android Photo" /> </RelativeLayout> The ads are shown at the bottom of the screen, just as I want. However, they seem to be overlayed or drawn on top of the bottom portion of the grid view. I would like the gridview to be shorter, so that the ad can fill the bottom portion of the screen, and not hide part of the gridview. The problem is most annoying when you scroll all the way to the bottom of the gridview, and you still cannot fully see the last row items in the grid due to the ad. I'm not sure if this is the standard way that AdMob ads work. If this is the case, adding some padding to the bottom of the grid (if that's possible) would due the trick. That way the user can scroll a bit further, and see the last row in addition to the ad. I just switched from using LinearLayout to RelativeLayout after reading some similar issues with ListViews. Now my ad is along the bottom instead of above the grid, so I'm getting closer. Thoughts? -Kevin

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• XCode linking error when targeting armv7.

  - by Tom

  I've already spent countless hours puzzling over this, utilizing Google searches and other Stack Overflow questions to no avail. I have an iPhone/iPad universal application, which seems to compile fine when the target is armv6. However, when the device is iPad, I get this warning: warning: building for SDK 'Device - iPhone OS 3.2' requires an armv7 architecture. Oddly enough, the app still runs great on iPad in spite of this warning. However, I do want to do things the "right way" what ever that means in this case. When I switch the target architecture to armv7, I get linking errors: "___restore_vfp_d8_d15_regs", referenced from: *redacted* "___save_vfp_d8_d15_regs", referenced from: *redacted* ld: symbol(s) not found collect2: ld returned 1 exit status The "redacted" portions of the errors are references to the static library to which I'm trying to link. Here's what I've tried from the many suggestions online. Each of these were suggested more than once without any explanation, which leads me to believe nobody quite understands this problem: "Never use the drop down menu in the upper left of the XCode window to choose the target. Instead, set this to Base SDK and then the Base SDK to iPhone OS 3.0 in the target configuration. Set the target device to your preferred target (iPad, iPhone OS 3.2 in my situation.)" This yields the error "Library not found for -lcrt1.3.1.o" "Make sure that GCC isn't linking against the wrong version of the standard library. (You'll have to make sure the LIBRARY_SEARCH_PATH doesn't have the wrong path in it.)" My LIBRARY_SEARCH_PATH is already empty, so this doesn't seem relevant. "Try compiling with GCC 4.0 rather than GCC 4.2." I get a syntax error inside a UIKit header file. The error is "Syntax error before 'AT_NAME' token." The line is "UIKIT_EXTERN @interface UILocalizedIndexedCollation : NSObject." Another project compiles just fine with the same target settings, which is really making me question my sanity. Could I be dealing with a corrupt XCode project? If anyone knows what's actually happening and has a reference or doesn't mind explaining it, I would be so very grateful. Cheers!

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• Why is jQuery .load() firing twice?

  - by LeslieOA

  Hello S-O. I'm using jQuery 1.4 with jQuery History and trying to figure out why Firebug/Web Inspector are showing 2 XHR GET requests on each page load (double that amount when visiting my sites homepage (/ or /#). e.g. Visit this (or any) page with Firebug enabled. Here's the edited/relevant code (see full source): - $(document).ready(function() { $('body').delegate('a', 'click', function(e) { var hash = this.href; if (hash.indexOf(window.location.hostname) > 0) { /* Internal */ hash = hash.substr((window.location.protocol+'//'+window.location.host+'/').length); $.historyLoad(hash); return false; } else if (hash.indexOf(window.location.hostname) == -1) { /* External */ window.open(hash); return false; } else { /* Nothing to do */ } }); $.historyInit(function(hash) { $('#loading').remove(); $('#container').append('<span id="loading">Loading...</span>'); $('#ajax').animate({height: 'hide'}, 'fast', 'swing', function() { $('#page').empty(); $('#loading').fadeIn('fast'); if (hash == '') { /* Index */ $('#ajax').load('/ #ajax','', function() { ajaxLoad(); }); } else { $('#ajax').load(hash + ' #ajax', '', function(responseText, textStatus, XMLHttpRequest) { switch (XMLHttpRequest.status) { case 200: ajaxLoad(); break; case 404: $('#ajax').load('/404 #ajax','', ajaxLoad); break; // Default 404 default: alert('We\'re experiencing technical difficulties. Try refreshing.'); break; } }); } }); // $('#ajax') }); // historyInit() function ajaxLoad() { $('#loading').fadeOut('fast', function() { $(this).remove(); $('#ajax').animate({height: 'show', opacity: '1'}, 'fast', 'swing'); }); } }); A few notes that may be helpful: - Using WordPress with default/standard .htaccess I'm redirecting /links-like/this to /#links-like/this via JavaScript only (PE) I'm achieving the above with window.location.replace(addr); and not window.location=addr; Feel free to visit my site if needed. Thanks in advanced.

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• Dojo extending dojo.dnd.Source, move not happening. Ideas?

  - by Soulhuntre

  Hey all, Ok... I have a simple dojo page with the bare essentials. Three UL's with some LI's in them. The idea si to allow drag-n-drop among them but if any UL goes empty due to the last item being dragged out, I will put up a message to the user to gie them some instructions. In order to do that, I wanted to extend the dojo.dnd.Source dijit and add some intelligence. It seemed easy enough. To keep things simple (I am loading Dojo from a CDN) I am simply declating my extension as opposed to doing full on module load. The declaration function is here... function declare_mockupSmartDndUl(){ dojo.require("dojo.dnd.Source"); dojo.provide("mockup.SmartDndUl"); dojo.declare("mockup.SmartDndUl", dojo.dnd.Source, { markupFactory: function(params, node){ //params._skipStartup = true; return new mockup.SmartDndUl(node, params); }, onDndDrop: function(source, nodes, copy){ console.debug('onDndDrop!'); if(this == source){ // reordering items console.debug('moving items from us'); // DO SOMETHING HERE }else{ // moving items to us console.debug('moving items to us'); // DO SOMETHING HERE } console.debug('this = ' + this ); console.debug('source = ' + source ); console.debug('nodes = ' + nodes); console.debug('copy = ' + copy); return dojo.dnd.Source.prototype.onDndDrop.call(this, source, nodes, copy); } }); } I have a init function to use this to decorate the lists... dojo.addOnLoad(function(){ declare_mockupSmartDndUl(); if(dojo.byId('list1')){ //new mockup.SmartDndUl(dojo.byId('list1')); new dojo.dnd.Source(dojo.byId('list1')); } if(dojo.byId('list2')){ new mockup.SmartDndUl(dojo.byId('list2')); //new dojo.dnd.Source(dojo.byId('list2')); } if(dojo.byId('list3')){ new mockup.SmartDndUl(dojo.byId('list3')); //new dojo.dnd.Source(dojo.byId('list3')); } }); It is fine as far as it goes, you will notice I left "list1" as a standard dojo dnd source for testing. The problem is this - list1 will happily accept items from lists 2 & 3 who will move or copy as apprriate. However lists 2 & 3 refuce to accept items from list1. It is as if the DND operation is being cancelled, but the debugger does show the dojo.dnd.Source.prototype.onDndDrop.call happening, and the paramaters do look ok to me. Now, the documentation here is really weak, so the example I took some of this from may be way out of date (I am using 1.4). Can anyone fill me in on what might be the issue with my extension dijit? Thanks!

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• Jruby Gems-in-a-jar issue

  - by antonio

  Hi all, I am trying to write some code in ruby (using jruby) to be compiled to java bytecode with jrubyc and deployed to a remote machine where it will be run on the JVM (no ruby available there). Everything works fine as long as I am happy to stick with the standard jruby library. As explained on the jruby website, I simply copy the jruby-complete.jar library to the remote machine and include it in the classpath at runtime. I fire my compiled script and it works: cool! The problems start when I need some other libraries (typically rubygems) to run my script. I am aware of cool stuff like rawr, -which I successfully tested- to put together all you need in a single package. However that is not the solution I am looking for: I will have many small scripts to run independently and I don't want each of them to grow to at least 10 MB just because I insanely include the jruby-complete.jar in each of them. What I would like is to compile a .jar for each of the libraries that I will need to use, put all of them in a common folder on the remote machine and include them at runtime in the classpath when I run my compiled jruby scripts on the JVM. This said, I tried to follow the instructions here: http://blog.nicksieger.com/articles/2009/01/10/jruby-1-1-6-gems-in-a-jar I tried exactly the example shown there, with the "chronic" gem. Going step by step: Install the gem locally: java -jar jruby-complete-1.1.6.jar -S gem install -i ./chronic chronic --no-rdoc --no-ri Package it into a jar: jar cf chronic.jar -C chronic . Write a two lines test script, saving it as testt.rb: require 'chronic' Chronic.parse('tomorrow') Compile with: jrubyc testt.rb Run the resulting java class testt.class with the following (having both jruby-complete.jar and chronic.jar in the same folder as the java class): java -cp .:/jruby-complete.jar:./chronic.jar testt I get the following error: Exception in thread "main" file:/Users/ave2/NetBeansProjects/jrubywatir/lib/jruby-complete.jar!/METAINF/jruby.home/lib/ruby/site_ruby/shared/builtin/core_ext/symbol.rb:1:in `const_missing': uninitialized constant Chronic (NameError) from testt.rb:2 ...internal jruby stack elided... from Module.const_missing(testt.rb:2) from (unknown).(unknown)(:1) I really don't understand what I am doing wrong, and I am totally stuck on this. I am a noob in Ruby, much more used to Python: don't miss a chance to convert an infidel! :-) Thanks.

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• Color Theory: How to convert Munsell HVC to RGB/HSB/HSL

  - by Ian Boyd

  I'm looking at at document that describes the standard colors used in dentistry to describe the color of a tooth. They quote hue, value, chroma values, and indicate they are from the 1905 Munsell description of color: The system of colour notation developed by A. H. Munsell in 1905 identifies colour in terms of three attributes: HUE, VALUE (Brightness) and CHROMA (saturation) [15] HUE (H): Munsell defined hue as the quality by which we distinguish one colour from another. He selected five principle colours: red, yellow, green, blue, and purple; and five intermediate colours: yellow-red, green-yellow, blue-green, purple-blue, and red-purple. These were placed around a colour circle at equal points and the colours in between these points are a mixture of the two, in favour of the nearer point/colour (see Fig 1.). VALUE (V): This notation indicates the lightness or darkness of a colour in relation to a neutral grey scale, which extends from absolute black (value symbol 0) to absolute white (value symbol 10). This is essentially how ‘bright’ the colour is. CHROMA (C): This indicates the degree of divergence of a given hue from a neutral grey of the same value. The scale of chroma extends from 0 for a neutral grey to 10, 12, 14 or farther, depending upon the strength (saturation) of the sample to be evaluated. There are various systems for categorising colour, the Vita system is most commonly used in Dentistry. This uses the letters A, B, C and D to notate the hue (colour) of the tooth. The chroma and value are both indicated by a value from 1 to 4. A1 being lighter than A4, but A4 being more saturated than A1. If placed in order of value, i.e. brightness, the order from brightest to darkest would be: A1, B1, B2, A2, A3, D2, C1, B3, D3, D4, A3.5, B4, C2, A4, C3, C4 The exact values of Hue, Value and Chroma for each of the shades is shown below (16) So my question is, can anyone convert Munsell HVC into RGB, HSB or HSL? Hue Value (Brightness) Chroma(Saturation) === ================== ================== 4.5 7.80 1.7 2.4 7.45 2.6 1.3 7.40 2.9 1.6 7.05 3.2 1.6 6.70 3.1 5.1 7.75 1.6 4.3 7.50 2.2 2.3 7.25 3.2 2.4 7.00 3.2 4.3 7.30 1.6 2.8 6.90 2.3 2.6 6.70 2.3 1.6 6.30 2.9 3.0 7.35 1.8 1.8 7.10 2.3 3.7 7.05 2.4 They say that Value(Brightness) varies from 0..10, which is fine. So i take 7.05 to mean 70.5%. But what is Hue measured in? i'm used to hue being measured in degrees (0..360). But the values i see would all be red - when they should be more yellow, or brown. Finally, it says that Choma/Saturation can range from 0..10 ...or even higher - which makes it sound like an arbitrary scale. So can anyone convert Munsell HVC to HSB or HSL, or better yet, RGB?

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• Print Preview Control used in a custom Print Preview Dialog.

  - by Kildareflare

  I have successfully implemented printing and print preview for my app using the PrintDocument, PrintDialog and PrintPreviewDialog classes of .NET. However my app uses a toolkit to improve the appearance of the standard .NET controls. There are versions of most .NET controls in the toolkit, but none for the Print controls. Therefore to ensure that the appearance of these controls matches the rest of the app I am creating a custom PrintPreviewDialog based on a toolkit form and embedding a .NET PrintPrewviewControl in it. My problem is that the PrintPreviewControl always shows "No pages to display". I had no trouble getting this to work using the .NET PrintPreviewDialog and cannot see what I am doing wrong. This is a .NET 2.0 PrintPreviewControl and so I know that I need to call InvalidatePreview() after assigning the PrintDocument. However it does not seem to matter where i place it, the PrintPage event handler never gets called... EDIT: I've just noticed that while the original PrintDocument m_printDocument shows a PrintPageHandler in its properties, the m_printPreviewControl.Document does not. Any ideas why it is being lost..? public class PrintEngine { ...rest of class... public PrintEngine() { m_printDoc.PrintPage += new PrintPageEventHandler(printDoc_PrintPage); } public void PrintPreview() { //ORIGINAL CODE USING .NET DIALOG WORK OK //PrintPreviewDialog dlg1 = new PrintPreviewDialog(); //dlg1.Document = m_printDoc; //PrepareImageForPrinting(); //dlg1.ShowDialog(); //CODE USING MY CUSTOM DIALOG DO NOT WORK? MyPrintPreviewDialog dlg2 = new MyPrintPreviewDialog(); dlg2.Document = m_printDoc; PrepareImageForPrinting(); //Creates the m_printImage List dlg2.ShowDialog(); } private void printDoc_PrintPage(object sender, PrintPageEventArgs e) { e.Graphics.DrawImage(m_printImages[m_currentPage], new Point(0, 0)); m_currentPage++; e.HasMorePages = m_currentPage < m_pagesHigh; } }//end PrintEngine class public class MyPrintPreviewDialog : KryptonForm { public PrintDocument Document { get { return m_printPreviewControl.Document; } set { m_printPreviewControl.Document = value; m_printPreviewControl.InvalidatePreview(); } } public MyPrintPreviewDialog() { InitializeComponent(); m_printPreviewControl = new PrintPreviewControl(); m_printPreviewControl.StartPage = 0; } private void MyPrintPreviewDialog_Load(object sender, EventArgs e) { m_printPreviewControl.Document.DefaultPageSettings = new PageSettings(); m_printPreviewControl.Document.PrinterSettings = new PrinterSettings(); m_printPreviewControl.InvalidatePreview(); } }//end MyPrintPreviewDialog class

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• Another design-related C++ question

  - by Kotti

  Hi! I am trying to find some optimal solutions in C++ coding patterns, and this is one of my game engine - related questions. Take a look at the game object declaration (I removed almost everything, that has no connection with the question). // Abstract representation of a game object class Object : public Entity, IRenderable, ISerializable { // Object parameters // Other not really important stuff public: // @note Rendering template will never change while // the object 'lives' Object(RenderTemplate& render_template, /* params */) : /*...*/ { } private: // Object rendering template RenderTemplate render_template; public: /** * Default object render method * Draws rendering template data at (X, Y) with (Width, Height) dimensions * * @note If no appropriate rendering method overload is specified * for any derived class, this method is called * * @param Backend & b * @return void * @see */ virtual void Render(Backend& backend) const { // Render sprite from object's // rendering template structure backend.RenderFromTemplate( render_template, x, y, width, height ); } }; Here is also the IRenderable interface declaration: // Objects that can be rendered interface IRenderable { /** * Abstract method to render current object * * @param Backend & b * @return void * @see */ virtual void Render(Backend& b) const = 0; } and a sample of a real object that is derived from Object (with severe simplifications :) // Ball object class Ball : public Object { // Ball params public: virtual void Render(Backend& b) const { b.RenderEllipse(/*params*/); } }; What I wanted to get is the ability to have some sort of standard function, that would draw sprite for an object (this is Object::Render) if there is no appropriate overload. So, one can have objects without Render(...) method, and if you try to render them, this default sprite-rendering stuff is invoked. And, one can have specialized objects, that define their own way of being rendered. I think, this way of doing things is quite good, but what I can't figure out - is there any way to split the objects' "normal" methods (like Resize(...) or Rotate(...)) implementation from their rendering implementation? Because if everything is done the way described earlier, a common .cpp file, that implements any type of object would generally mix the Resize(...), etc methods implementation and this virtual Render(...) method and this seems to be a mess. I actually want to have rendering procedures for the objects in one place and their "logic implementation" - in another. Is there a way this can be done (maybe alternative pattern or trick or hint) or this is where all this polymorphic and virtual stuff sucks in terms of code placement?

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• Tridion Installation

  - by Kevin Brydon

  I am currently upgrading an installation of Tridion from 5.3 to 2011 starting almost from scratch (aside from migrating the database), brand new virtual servers. I just want to ask for some advice on my current server setup... a sanity check. All servers are running Windows Server 2008. The pages on our website are all classic ASP. Database SQL Server cluster. The 5.3 database has been migrated using the DatabaseManager. This is pretty standard and works well (in test anyway). Content Manager A single server to run the Content Manager and the Publisher. There are around 10 people using it at any one time so not under a particularly heavy load. Content Data Store Filesystem located somewhere on the network. One directory for live and one for staging. Content Delivery Two servers (cd1 and cd2) each with the the following server roles installed. cd1 writes to a filesystem content data store for the live website, cd2 writes to the content data store for the staging website. Presentation Two public facing web servers (web1 and web2) serving both the live and staging websites. The web servers read directly from the content data store as its a filesystem. Each of the web servers have the Content Delivery Server installed so that I can use dynamic linking (and other features?). I've so far set up everything but the web servers. Any thoughts? edit Thanks to Ram S who linked me to a decent walkthrough, upvoted. I suppose I should have posed some questions as I didn't really ask a question. I guess I'm a little confused over the content deliver aspect. I have the Content Delivery split in two separate parts. cd1 and cd2 do the work of shifting information from the Content Manager to the Staging/Live web directories. web1 and web2 should do the work of serving the web pages to the outside world and will interact with the content data store (file system). Is this a correct setup? I need some parts of the Content Delivery on my web servers right? Theoretically I could get rid of the cd1 and cd2 servers and use web1 and web2 to do the deployment right? But I suspect this will put the web servers under unnecessary strain should there ever be a big publish. I've been reading the 2011 Installation Manual, Content Delivery section, and I'm finding it quite hard to get my head around!

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