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• DDD/NHibernate Use of Aggregate root and impact on web design - ex. Editing children of aggregate ro

  - by pbrophy

  Hopefully, this fictitious example will illustrate my problem: Suppose you are writing a system which tracks complaints for a software product, as well as many other attributes about the product. In this case the SoftwareProduct is our aggregate root and Complaints are entities that only can exist as a child of the product. In other words, if the software product is removed from the system, so shall the complaints. In the system, there is a dashboard like web page which displays many different aspects of a single SoftwareProduct. One section in the dashboard, displays a list of Complaints in a grid like fashion, showing only some very high level information for each complaint. When an admin type user chooses one of these complaints, they are directed to an edit screen which allows them to edit the detail of a single Complaint. The question is: what is the best way for the edit screen to retrieve the single Complaint, so that it can be displayed for editing purposes? Keep in mind we have already established the SoftwareProduct as an aggregate root, therefore direct access to a Complaint should not be allowed. Also, the system is using NHibernate, so eager loading is an option, but my understanding is that even if a single Complaint is eager loaded via the SoftwareProduct, as soon as the Complaints collection is accessed the rest of the collection is loaded. So, how do you get the single Complaint through the SoftwareProduct without incurring the overhead of loading the entire Complaints collection?

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• Problem using FtpWebRequest to append to file on a mainframe

  - by MusiGenesis

  I am using FtpWebRequest to append data to a mainframe file. Each record appended is 50 characters long, and I am adding them one record at a time. In our development environment, we do not have a mainframe, so my code was written and tested FTPing to a Windows-based FTP site instead of a mainframe. Initially, I was writing each record using a StreamWriter (using the stream from the FtpWebRequest) and writing each record using WriteLine (which automatically adds a CR/LF to the end). When we ran this for the first time in the test environment (in which we're writing to an actual MVS mainframe), our mainframe contact said the CR/LFs were not able to be read by his program (a green-screen mainframe program of some sort - he's sent me screen captures, which is all I know of it). I changed our code to use Write instead of WriteLine, but now my code executes successfully (i.e no thrown exceptions) when writing multiple records, but no matter how many records we append, he is only able to "see" the first record - according to his mainframe program, there is only one 50-character record in the file. I'm guessing that to fix this, I need to write some other line-delimiting character into the end of the stream (instead of CR/LF) that the mainframe will recognize as a record delimiter. Anybody know what this is, or how else I can fix this problem?

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• Using Google Maps v3, PHP and Json to plot markers

  - by bateman_ap

  Hi, I am creating a map using the new(ish) v3 of the Google Maps API I have managed to get a map displaying using code as below: var myLatlng = new google.maps.LatLng(50.8194000,-0.1363000); var myOptions = { zoom: 14, center: myLatlng, mapTypeControl: false, scrollwheel: false, mapTypeId: google.maps.MapTypeId.ROADMAP }; var map = new google.maps.Map(document.getElementById("location-map"), myOptions); However I now want to add a number of markers I have stored in a PHP array. The Array currently looks like this if I print it out to screen: Array ( [0] => Array ( [poiUid] => 20 [poiName] => Brighton Cineworld [poiCode] => brighton-cineworld [poiLon] => -0.100450 [poiLat] => 50.810780 [poiType] => Cinemas ) [1] => Array ( [poiUid] => 21 [poiName] => Brighton Odeon [poiCode] => brighton-odeon [poiLon] => -0.144420 [poiLat] => 50.821860 [poiType] => Cinemas ) ) All the reading I have done so far suggests I turn this into JSON by using json_encode If I run the Array though this and echo it to the screen I get: [{"poiUid":"20","poiName":"Brighton Cineworld","poiCode":"brighton-cineworld","poiLon":"-0.100450","poiLat":"50.810780","poiType":"Cinemas"},{"poiUid":"21","poiName":"Brighton Odeon","poiCode":"brighton-odeon","poiLon":"-0.144420","poiLat":"50.821860","poiType":"Cinemas"}] The bit now is where I am struggling, I am not sure the encoded array is what I need to start populating markers, I think I need something like the code below but not sure how to add the markers from my passed through JSON var locations = $jsonPoiArray; for (var i = 0;i < locations.length; i += 1) { // Create a new marker };

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• Using a UITextView in a UITableViewCell with a UIKeyboard

  - by Luther Baker

  I have a simple UITableView that has two cells. Cell 0:0 consists of a UITextField we'll call the title and Cell 0:1 consists of a UITextView we'll simply call a note. Cell 0:0 (the text field) is a standard size, one row cell. I'm therefore trying to fill the rest of the screen up with Cell 0:1 so I return a larger height for it. This all displays just fine and I'm using most of the iPhone real estate pretty efficiently at this point. Now, when a user wants to edit one of these cells, he need only click in the appropriate textfield or textview. If a user clicks in the textfield of Cell 0:0, all is well and the keyboard slides up from the bottom. My problem occurs when a user clicks into the the textview (Cell 0:1). No matter what I try, the UITableView wants to slide the entire table view up and that generally put the UITextView in Cell 0:1 halfway out of sight. What I want to do is two fold, I'm registered for when the keyboard will appear and in that method, I'd like to shrink the UITextView in Cell 0:1 as well as shrink the UITableViewCell itself so that the keyboard doesn't have to be smart and think it has to slide the UITableViewCell into view. Unfortunately, no matter what I try, the UITableView slides up. I just want the UITableView to stand still and I want the cell to animate up/shorter with the keyboard. It appears that, by the time the keyboard is actually animating into the screen - it is to late to adjust the cell size. The UIKit has already made up it's mind that it is going to scroll the UITableView.

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• Contact-app like scrollinglist on android

  - by Alxandr

  I'm writing my first android app (I'm a noob at android, but decent at java). The first screen of the app consists of a huge list (about 1.5K items) of Manga-objects. The code I use is as following: main.xml: <?xml version="1.0" encoding="utf-8"?> <LinearLayout android:id="@+id/LinearLayout01" android:layout_width="fill_parent" android:layout_height="fill_parent" xmlns:android="http://schemas.android.com/apk/res/android"> <ListView android:layout_height="fill_parent" android:layout_width="fill_parent" android:id="@+id/android:list"></ListView> <TextView android:layout_height="fill_parent" android:layout_width="fill_parent" android:text="@string/list_no_items" android:id="@+id/android:empty"></TextView> </LinearLayout> row.xml: <LinearLayout android:id="@+id/LinearLayout01" android:layout_width="fill_parent" android:layout_height="?android:attr/listPreferredItemHeight" android:padding="6dip" xmlns:android="http://schemas.android.com/apk/res/android"> <ImageView android:id="@+id/icon" android:layout_width="wrap_content" android:layout_height="fill_parent" android:layout_marginRight="6dip" android:src="@drawable/icon" /> <LinearLayout android:orientation="vertical" android:layout_width="0dip" android:layout_weight="1" android:layout_height="fill_parent"> <TextView android:id="@+id/toptext" android:layout_width="fill_parent" android:layout_height="0dip" android:layout_weight="1" android:gravity="center_vertical" /> <TextView android:layout_width="fill_parent" android:layout_height="0dip" android:layout_weight="1" android:id="@+id/bottomtext" android:singleLine="true" android:ellipsize="marquee" /> </LinearLayout> </LinearLayout> Then I have a adapter which basically takes a Manga-object and puts it's name in the rows toptext, and it's latest updated date in the bottomtext. However, (this might be caused by the virtualization of the unit though), the result is really slow. Scrolling the list takes forever and you can only scroll small peaces of the time. How can I make the list work like the one in the contacts-app? So that when you start scrolling a handle pops out at the right side of the screen, and when you drag it letters shows up as of how far you've scrolled (the list is sorted alphabetically), and also, is there a way I could improve the performance of the list?

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• Pop-up modal with UITableView on iPhone

  - by Meltemi

  I need to pop up a quick dialog for the user to select one option in a UITableView from a list of roughly 2-5 items. Dialog will be modal and only take up about 1/2 of screen. I go back and forth between how to handle this. Should I subclass UIView and make it a UITableViewDelegate & DataSource? I'd also prefer to lay out this view in IB. So to display I'd do something like this from my view controller (assume I have a property in my view controller for DialogView *myDialog;) NSArray* nibViews = [[NSBundle mainBundle] loadNibNamed:@"DialogView" owner:myDialog options:nil]; myDialog = [nibViews objectAtIndex:0]; [self.view addSubview:myDialog]; problem is i'm trying to pass owner:myDialog which is nil as it hasn't been instantiated...i could pass owner:self but that would make my view controller the File's Owner and that's not how that dialog view is wired in IB. So that leads me to think this dialog wants to be another full blown UIViewController... But, from all I've read you should only have ONE UIViewController per screen so this confuses me because I could benefit from viewDidLoad, etc. that come along with view controllers... Can someone please straighten this out for me?

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• Scrolling issues with GridView in Android

  - by Jared Thigpen

  I am having weird scrolling issues in my pretty simple GridView. Each item in the Grid is simply and ImageView and a TextView. The activity itself is simply an application selector. It looks like a rough version of the basic App Tray in Android. The issue is that after spending some times scrolling through my view, it will inevitably allow me to continue scrolling past the top row of icons, to a blank screen, and the scroll bar will disappear, leaving me stuck. It doesn't happen every time I go to the top of the view, only sometimes, and usually only after some excessive scrolling. If I happen to notice the problem and catch it before the top row disappears off the bottom of the screen, I can usually scroll back through the view and spot some icons missing. There are empty spaces in the grid, and I can only assume that those icons have been moved to some bizarre position, which is allowing the view to scroll past the top. This is my first Android app beyond a basic Hello World, so it's likely that I've just screwed up something in my layout files. I also realize that this is probably a pretty confusing description, so I'm hoping someone has experienced this and my search abilities simply were unable to find it. I can post my layout files or other code if someone thinks that's useful. Oh, and the program is built against 1.5, but is running on 2.2 (whatever state of 2.2 that was that snuck out last week) on my phone. I don't have enough apps to test this on an emulator, but could probably set something up if someone felt it necessary. Thanks in advance for any help on the issue.

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• Android: SharedPreference: Defaults not set at startup...

  - by Allan

  I have Listpreferences in my app. They don't appear to be setting to their defaults right after installation - they appear to be null. I'm trying to figure out why my default preferences are not being set right after installation. In my main code I have: SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(this); InUnits = sp.getString("List1", "defValue"); InAngs = sp.getString("List2", "defValue"); OutUnits = sp.getString("List3", "defValue"); OutAngs = sp.getString("List4", "defValue"); Right after the above code executes, each variable contains "defValue" instead of the actual values I have assigned in my ListPreference below. My preference xml file is called, "settings.xml". Here's what one of the ListPreferences there looks like: <ListPreference android:key="List1" android:title="Input: Alph" android:summary="Choose Alph or Ralph" android:entries="@array/inputAlph" android:entryValues="@array/input_Alph_codes" android:dialogTitle="Input Alph" android:defaultValue="ININ"/> Here's what some of my strings.xml file looks like: <string-array name="inputUnits"> <item>Alph</item> <item>Ralph</item> </string-array> <string-array name="input_Alph_codes"> <item>ININ</item> <item>INMM</item> </string-array> When I go to menu, and then settings, I can see my defaults checked (radiobuttoned). Then when I go back from the settings menu to my main screen - all is well - for life! ...then each var above is assigned the proper default value. This only happens when I first install my app on the phone. After I go to the settings screen once and then right out of it, the app is fine and accepts any setting changes. By the way, as you can see, "List1" is the android:key within a file called settings.xml in my res/xml folder.

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• UIView rotation, modal view lanscape and portrait, parent fails to render

  - by Ben

  Hi everyone, I've hit a bit of a roadblock with something that I hope that someone in here can help me out with. I'll describe the 'state of play' first, and then what the issue is, so here goes; I have a series of view controllers that are chained together with a Navigation Controller (this works just fine), All of these view controllers support portrait mode only (by design), In one of the view controllers (the 'end' one actually) the user can click a table cell to pop up a modal view controller (using presentModalViewController(...) of course) This modal view controller supports portrait and landscape modes (and this works), When the user clicks the 'Done' button on this modal view controller we pop and pass control back to the parent view controller, however; If the user is in portrait mode when they click 'Done' then the parent displays itself just fine, If the user is in landscape mode when they click 'Done' then the parent displays a totally white, blank screen (that covers the whole screen). It is as if the controller does not know how to render in landscape and just doesn't bother. I'd like to be able to have this parent view render in portrait no matter what the orientation of the phone is when the user clicks the 'Done' button. Various forum posts suggest using the UIDevice method 'setOrientation' (but this is undocumented and will get our app rejected apparently). Another suggestion was to set the 'statusBarOrientation' to portrait in the 'viewWillAppear' method but that had no effect. So I am a bit stuck! Has any encountered anything like this before? If need be I can provide code, if that will help anyone diagnose the problem for me. Thanks in advance! Cheers, Ben

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• UIView animation VS core animation

  - by Tom Irving

  I'm trying to animate a view sliding into view and bouncing once it hits the side of the screen. A basic example of the slide I'm doing is as follows: // The view is added with a rect making it off screen. [UIView beginAnimations:nil context:NULL]; [UIView setAnimationBeginsFromCurrentState:YES]; [UIView setAnimationDuration:0.07]; [UIView setAnimationCurve:UIViewAnimationCurveLinear]; [UIView setAnimationDelegate:self]; [UIView setAnimationDidStopSelector:@selector(animationDidStop:finished:context:)]; [theView setFrame:CGRectMake(-5, 0, theView.frame.size.width, theView.frame.size.height)]; [UIView commitAnimations]; More animations are then called in the didStopSelector to make the bounce effect. The problem is when more than one view is being animated, the bounce becomes jerky and, well, doesn't bounce anymore. Before I start reading up on how to do this in Core Animation, (I understand it's a little more difficult) I'd like to know if there is actually an advantage using Core Animation rather than UIView animations. If not, is there something I can do to improve performance?

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• ASP.NET MVC Session Expiration

  - by Andrew Flanagan

  We have an internal ASP.NET MVC application that requires a logon. Log on works great and does what's expected. We have a session expiration of 15 minutes. After sitting on a single page for that period of time, the user has lost the session. If they attempt to refresh the current page or browse to another, they will get a log on page. We keep their request stored so once they've logged in they can continue on to the page that they've requested. This works great. However, my issue is that on some pages there are AJAX calls. For example, they may fill out part of a form, wander off and let their session expire. When they come back, the screen is still displayed. If they simply fill in a box (which will make an AJAX call) the AJAX call will return the Logon page (inside of whatever div the AJAX should have simply returned the actual results). This looks horrible. I think that the solution is to make the page itself expire (so that when a session is terminated, they automatically are returned to the logon screen without any action by them). However, I'm wondering if there are opinions/ideas on how best to implement this specifically in regards to best practices in ASP.NET MVC.

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• Keyboard Animation Issues When Calling becomeFirstResponder within a Modal View Controller

  - by LucasTizma

  I've been having some issues with calling -becomeFirstResponder on a UITextField contained with a view controller that is presented modally. I call this method in the modal view controller's -viewDidLoad method so that the keyboard is immediately displayed. What I expected is for both the keyboard and the modal view controller to animate from up the bottom of the screen at the same time. However, what I'm observing is the following: There is a ~0.2 second UI lag between clicking the button that calls the -presentModalViewController:animated: method on the parent view controller and when the child view controller begins to animate modally. The keyboard is immediately presented with absolutely no animation about half-way through the modal view controller's animation. Once the modal view controller's animation is complete, everything else seems to operate smoothly. Dismissing the modal view controller results in it being smoothly animated off screen (along with the keyboard, coincidentally). It's as if the keyboard's animation and the modal view controller's animation are both competing for some lower-level Core Animation resource at the same time, but I don't see why this should be happening. What further seems to corroborate this hunch is if I don't ask the UITextField to become the first responder (i.e., if I don't ask the keyboard to present itself), then there is absolutely no UI lag, and the modal view controller animates instantly. Interestingly, if I do something like [self.textField performSelector:@selector(becomeFirstResponder) withObject:nil afterDelay:0.0001]; then the animation of the keyboard happens nearly at the same time as the modal view controller's animation -- it's extremely difficult to tell that they aren't both being animated at the exact same time. Furthermore, there's no more UI lag. Has anyone experienced anything similar to this?

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• iPad: Move UIView with animation, then move it back

  - by Joel

  I have the following code in a UIView subclass that will move it off the screen with an animation: float currentX = xposition; //variables that store where the UIView is located float currentY = yposition; float targetX = -5.0f - self.width; float targetY = -5.0f - self.height; moveX = targetX - currentX; //stored as an instance variable so I can hang on to it and move it back moveY = targetY - currentY; [UIView beginAnimations:@"UIBase Hide" context:nil]; [UIView setAnimationDuration:duration]; self.transform = CGAffineTransformMakeTranslation(moveX,moveY); [UIView commitAnimations]; It works just great. I've changed targetX/Y to 0 to see if it does indeed move to the specified point, and it does. The problem is when I try and move the view back to where it was originally: moveX = -moveX; moveY = -moveY; [UIView beginAnimations:@"UIBase Show" context:nil]; [UIView setAnimationDuration:duration]; self.transform = CGAffineTransformMakeTranslation(moveX,moveY); [UIView commitAnimations]; This puts the UIView about 3x as far as it should. So the view usually gets put off the right side of the screen (depending on where it is). Is there something with the CGAffineTransforMakeTranslation function that I should know? I read the documentation, and from what I can tell, it should be doing what I'm expecting it to do. Anyone have a suggestion of how to fix this? Thanks.

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• Force a UIView to redraw immediately, instead of during next run loop

  - by Justin Kent

  I've created a UIImagePicker / camera view, with a toolbar and custom button for taking a snapshot. I can't really change to using the default way because of the custom button, and I'm drawing on top of the view. When you hit the button, I want to take a screenshot using UIGetScreenImage(); however, the toolbar is showing up in the image, even if I hide it first: //hide the toolbar self.toolbar.hidden = YES; // capture the screen pixels CGImageRef screenCap = UIGetScreenImage(); I'm pretty sure this is because even though the toolbar is hidden, it gets redrawn once the function returns and we enter the next run loop - after UIGetScreenImage is called. I tried making the following addition, but it didn't help: //hide the toolbar self.toolbar.hidden = YES; [self.toolbar drawRect:CGRectMake(0, 0, 320, 52)]; // capture the screen pixels CGImageRef screenCap = UIGetScreenImage(); I also tried using setNeedsDisplay, but that doesn't work either because once again the draw happens after the current function returns. Any suggestions? Thanks!

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• Flex HTMLLoader component not raising mouseDown events for all mouse clicks

  - by shane

  I have built a Air 2/Flex 4 kiosk application with Flash Builder 4. Currently I am implementing a touch screen browser to enable users to navigate company training videos. In an attempt to improve the usability of the website on the touchscreen I have placed the HTML component in an adaption of Doug McCune's DragScrollingCanvas (updated to use the flex 4 'Scroller' component) to allow users to scroll the webpage by dragging their finger across the screen. The mouseDown event is used to start scrolling the viewport. In addition the webpage was modified to disable text selection with the following css: html { -webkit-user-select: none; cursor: default; } The problem I face is that the HTMLLoader component only fires a mouseDown if a link/input/button on the webpage is clicked, not when the background or any text is clicked. In addition if I remove the custom css the mouseDown event will not fire when text is being selected, but will if previously highlighted text is clicked. As an alternative I also tried adding a group container with the same dimensions as the HTMLLoader to detect the mouseDown events (so that the group container and HTMLLoader have the same Dragable parent container) and was able to capture mouseDown events and scroll the viewport as expected. However as the mouse event is handled by the group container, I am now unable to navigate the webpage. Does anybody know why the HTMLLoader component is not raising mouseDown events for all mouse clicks?

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• HTML inside webView

  - by Samuh

  I am posting some data to a server using DefaultHttpClient class and in the response stream I am getting a HTML file. I save the stream as a string and pass it onto another activity which contains a WebView to render this HTML on the screen: response = httpClient.execute(get); InputStream is = response.getEntity().getContent(); BufferedReader br = new BufferedReader(new InputStreamReader(is,"utf-8")); StringBuffer sb = new StringBuffer(); String line; while((line=br.readLine())!=null){ sb.append(line); sb.append("\n"); } is.close(); Intent intent = new Intent(this,Trial.class); intent.putExtra("trial",sb.toString()); startActivity(intent); Log.i("SB",sb.toString()); In Second Activity, the code to load the WebView reads: WebView browser = ((WebView)findViewById(R.id.trial_web)); browser.getSettings().setJavaScriptEnabled(true); browser.loadData(html,"text/html", "utf-8"); When I run this code, the WebView is not able to render the HTML content properly. It actually shows the HTML string in URL encoded format on the screen. Interestingly, If I copy the Loggers output to HTML file and then load this HTML in my WebView(using webview.loadurl(file:///assets/xyz.html)) everything works fine. I suspect some problem with character encoding. What is going wrong here? Please help. Thanks.

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• Making a Text-To-Speech Wrapper in Android

  - by John Montgomery

  I am attempting to create a wrapper class for Google Android's Text-To-Speech functionality. However, I'm having trouble finding a way to have the system pause until after the onInit function has finished. Attached at the bottom is something of a solution I created based on what I found here: http://stackoverflow.com/questions/1160876/android-speech-how-can-you-read-text-in-android However, this solution does not seem to work. Any thoughts on why this might not be working, or what would be a good idea in order to make sure that any Speak() calls happen after my onInit() call? public class SpeechSynth implements OnInitListener { private TextToSpeech tts; static final int TTS_CHECK_CODE = 0; private int ready = 0; private ReentrantLock waitForInitLock = new ReentrantLock(); SpeechSynth( Activity screen ) { ready = 0; tts = new TextToSpeech( screen, this ); waitForInitLock.lock(); } public void onInit(int status) { if (status == TextToSpeech.SUCCESS) { ready = 1; } waitForInitLock.unlock(); } public int Speak( String text ) { if( ready == 1 ) { tts.speak(text, TextToSpeech.QUEUE_ADD, null); return 1; } else { return 0; } } } I have been able to make it so that I can pass a string of text through the constructor, then have it played in the onInit() function. However, I would really like to avoid having to destroy and re-create the whole text-to-speech engine every time I need to have my program say something different.

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• How to use Scala in IntelliJ IDEA (or: why is it so difficult to get a working IDE for Scala)?

  - by Alex R

  I recently gave up trying to use Scala in Eclipse (basic stuff like completion doesn't work). So now I'm trying IntelliJ. I'm not getting very far. I've been able to edit programs (within syntax highlighting and completion... yay!). But I'm unable to run even the simplest "Hello World". This was the original error: Scala signature Predef has wrong version Expected 5.0 found: 4.1 in .... scala-library.jar But that was yesterday with IDEA 9.0.1. See below... UPDATE Today I uninstalled IntelliJ 9.0.1, and installed 9.0.2 Early Availability, with the 4/14 stable version of the Scala plug-in. Then I setup a project from scratch through the wizards: new project from scratch JDK is 1.6.u20 accept the default (project) instead of global / module accept the download of Scala 2.8.0beta1 into project's lib folder Created a new class: object hello { def main(args: Array[String]) { println("hello: " + args); } } For my efforts, I now have a brand-new error :) Here it is: Scalac internal error: class java.lang.ClassNotFoundException [java.net.URLClassLoader$1.run(URLClassLoader.java:202), java.security.AccessController.doPrivileged(Native Method), java.net.URLClassLoader.findClass(URLClassLoader.java:190), java.lang.ClassLoader.loadClass(ClassLoader.java:307), sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301), java.lang.ClassLoader.loadClass(ClassLoader.java:248), java.lang.Class.forName0(Native Method), java.lang.Class.forName(Class.java:169), org.jetbrains.plugins.scala.compiler.rt.ScalacRunner.main(ScalacRunner.java:72)] FINAL UPDATE I uninstalled 9.0.2 EA and reinstalled 9.0.1, but this time went with the 2.7.3 version of Scala rather than the default 2.7.6, because 2.7.3 is the one shown in the screen-shots at the IntelliJ website (I guess the screen-shots prove that they actually tested this version!). Now everything works!!!

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• UITouch Event Propagation To Background UIViews

  - by drewww

  I'm having troubles getting any UIView that's not the foreground UIView to receive UITouch events. I'm building an all-Core Graphics-app, so I'm not using any built in UIViews or IB or anything - everything is programmatically constructed and drawn into. Here's my view hierarchy: Root View Type A Container Type A View Type A View Type A View Type B Container Type B View Type B View Type B View The containers are just vanilla UIView objects that I create programmatically and add instances of Type A and B to when they're created. I did this originally to make hitTesting easier—Type A objects can be drag-and-dropped onto Type B objects. Type A objects receive touch events fine, but Type B objects (which are contained by Type B Container which is behind Type A Container) don't receive touch events. Both containers occupy the entire screen; they're basically just convenience containers. If I pull Type B Container to the front (eg [self.view bringSubviewToFront:Type B Container]) it receives events properly, but then the Type A Container doesn't get events. How do I propagate events from the view that's on top? Both views occupy the entire screen, so it makes sense that the top-most view is catching the events, but how should I get it to pass those events on to Type B Container? I could inject some code in the container that passes the touch events back to the main ViewController which can pass them on to Type B Container but that feels really messy to me. Is there a nicer way to not have the Type A Container stop propagation? What's the best practice here?

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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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• Smoothing touch-based animation in iPhone OpenGL?

  - by quixoto

  I know this is vague, but looking for general tips/help on this, as it's not an area of significant expertise for me. I have some iPhone code that's basically an EAGL view handling a single touch. The app draws (using GL) a circle via triangle fan at the touch point, and moves it when the user moves the touch point, and re-renders the view then. When dragging a finger slowly, the circle keeps up and consistent with the finger as it moves. If I scribble my finger quickly back and forth across the screen, the rendering doesn't keep up with the touch motion, so you see an optical illusion of "multiple" discrete circles on the screen "at once". (Normal persistence of vision illusion). This optical illusion is jarring. How can I make this look more natural? Can I blur the motion of the circle somehow? Is this result the evidence of some bad frame rate issue? I see this artifact even when nothing else is being rendered, so I think this might just be as fast as we can go. Any hints or suggestions? Much appreciated. Thanks.

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• Two Linked CSS Files Not working

  - by Oscar Godson

  <head> <title>Water Bureau</title> <link rel="shortcut icon" href="/favicon.ico" /> <link rel="stylesheet" href="/css/main.css" type="text/css" media="screen" title="Main CSS"> <link rel="stylesheet" href="custom.css" type="text/css" media="screen" title="Custom Styles"> <script language="JavaScript" src="/shared/js/createWin.js" type="text/javascript"></script> </head> Thats the code, but the "custom.css" isn't working. It doesn't work at all. If we add a @import into main.css OR into the header instead of a it works fine though. Any ideas? We also got rid of the media="screens" on both as well. The CSS inside of it is working fine, it's just when we stack those two, the first one parsed is the only one read by the browser. So if we swap main below custom, custom than works but NONE of main works. and custom just has snippet of CSS, and doesn't override all the CSS in main, just 1 element. I can't figure it out! We have other ed stylesheets in the head (which we took out for trying to fix this) and they worked fine...

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• iPhone SDK - (void)viewDidLoad { } - Show Progress

  - by Hank Brekke

  I have a long - (void)viewDidLoad { } function that uses the internet to load a page, and whenever the application loads the URL, the screen is black. I have a UIActivityIndicator setup to show that the address is loading, but I don't know how to prevent it from seeming as if the application is not responding, and I don't want to show the network activity indicator [[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:YES]; because the screen will still be black, just with a loader in the top corner. My code is below: - (void)viewDidLoad { NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults]; email.text = [defaults objectForKey:@"mom_email"]; pass.text = [defaults objectForKey:@"mom_pass"]; if (email.text != nil && pass.text != nil) { [self login:loginBtn]; } } - (IBAction)login:(id)sender { [email resignFirstResponder]; [pass resignFirstResponder]; [loader startAnimating]; // Does nothing though NSString *em = (NSString *)CFURLCreateStringByAddingPercentEscapes(NULL,(CFStringRef)email.text,NULL,(CFStringRef)@"!*'();:@&=+$,/?%#[]",kCFStringEncodingUTF8); NSString *ps = (NSString *)CFURLCreateStringByAddingPercentEscapes(NULL,(CFStringRef)pass.text,NULL,(CFStringRef)@"!*'();:@&=+$,/?%#[]",kCFStringEncodingUTF8); NSURL *url = [[NSURL alloc] initWithScheme:@"http" host:@"localhost" path:[[NSString alloc] initWithFormat:@"/app/login.php?email=%@&pass=%@", em, ps]]; NSURLRequest *request = [NSURLRequest requestWithURL:url]; NSData *data = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil]; NSString *loginResult = [[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding]; [loader stopAnimating]; NSRange range = [loginResult rangeOfString:@"1"]; if (range.location != NSNotFound) { [self dismissModalViewControllerAnimated:YES]; // Doesn't do anything if function called from viewDidLoad } }

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• Problems compiling peazip on OSX

  - by Yansky

  I'm having some problems with compiling Peazip on OSX (10.6). I emailed the Peazip developer and he said he probably couldn't help me too much as the error seems to be OSX specific and he doesn't have access to an OSX machine any more. The compiler I'm using is Lazarus as the source is in Pascal. The actual compile process seems to go ok, but when I run the peazip.app program launcher, I get the following error: http://img.photobucket.com/albums/v215/thegooddale/Screen-shot-2010-05-22-at-71907-PM.png Here is the app launcher that the compile made: http://forboden.com/coding/peazip.app.zip - you can use an unzip program to look at the files inside (i.e. unzip it twice). I also tried just running the peazip unix file executable that was produced after the compile from the terminal and I got this: http://img.photobucket.com/albums/v215/thegooddale/Screen-shot-2010-05-22-at-72148-PM.png Here are the messages from the compile log from Lazarus while compiling Peazip: http://pastebin.com/qK4bdncL (I asked on the Lazarus forums and they said I can just ignore those "ld: warning: unknown stabs type" warnings). Here is the info from the project_peach.compiled file: <?xml version="1.0"?> <CONFIG> <Compiler Value="/usr/local/bin/ppc386" Date="1238949773"/> <Params Value=" -MObjFPC -Sgi -O1 -gl -k-framework -kCarbon -k-framework -kOpenGL -k'-dylib_file' -k'/System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGL.dylib:/System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGL.dylib' -WG -vewnhi -l -Fu/Users/yansky/Desktop/peazip-3.1.src/res/themes/crystalc/ -Fu/Developer/lazarus/components/synedit/units/i386-darwin/ -Fu/Developer/lazarus/ideintf/units/i386-darwin/ -Fu/Developer/lazarus/lcl/units/i386-darwin/ -Fu/Developer/lazarus/lcl/units/i386-darwin/carbon/ -Fu/Developer/lazarus/packager/units/i386-darwin/ -Fu/Users/yansky/Desktop/peazip-3.1.src/ -Fu. -opeazip -dLCL -dLCLcarbon project_peach.lpr"/> </CONFIG> I guess there's little chance that anyone here has experience with Pascal and Lazarus since it's not that popular a language and the compiler is still in beta, but I thought I would post here in the hopes that someone might point me in the right general direction about where/how the peazip.app launcher is breaking.

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• GMap.NET shows no map

  - by Mariusz

  I'm trying to use the GMap.NET.WindowsForms control in my Windows forms application but I cannot make it show me any map. Here is what I did: I added the control to my Visual Studio's 2010 toolbox by clicking 'Choose Items...' from the toolbox's context menu and browsing for the GMap.NET.WindowsForms.dll included in the downloaded zip archive. I also added references to GMap.NET.Core.dll and System.Data.SQLite.dll in my solution. Then I put the GMapControl that appeared in the toolbox on the main form of my application and set the map type to GoogleMap. When I run my application, however, the control shows either a blue screen with a piece of text saying "We are sorry, but we don't have imagery at this zoom level for this region" or a bright screen with completely no data (when I change zoom level). Here is my code: GMapMain.MapType = MapType.GoogleMap; GMapMain.MaxZoom = 100; GMapMain.MinZoom = 0; GMapMain.Zoom = 50; GMapMain.CurrentPosition = new PointLatLng(54.6961334816182, 25.2985095977783); GMapMain.ReloadMap(); Please help. I have no idea what to do and I cannot find any information in the Internet that could help me solve the problem. Thank you very much in advance.

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