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• What is the correct way of handling a reloaded view after it was dismissed?

  - by favo

  Hi, I have the same problem as the guy here: http://stackoverflow.com/questions/2682844/uiimagepickercontroller-reloads-view-after-its-dismissed I have a UIView with a UIDatePicker within a Popover. When the Popover is dismissed and presented again, it sometimes resets the Picker in the view because hidden views are unloaded when a memory warning occurs. This is the part displaying the view: endCompareDateTimePicker.picker.maximumDate = [NSDate dateWithTimeIntervalSinceNow:0]; [endCompareDateTimePopover presentPopoverFromRect:sender.frame inView:self.view permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES]; The picker (IBOutlet UIDatePicker) does not stay initiated. Adding a [endCompareDateTimePicker loadView] helped out and got me the picker initiated to set the correct date values before displaying the view. While this is working, I dont think this is the proper way doing this. What would be the correct way to handle this situation?

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• I'd like to preview a Word document on form.

  - by Tychumsempir

  I'm writing a VB program that fills in values within a word document. I'm utilizing the Microsoft Word 12.0 Object Library as a Reference. I'd like to provide a scrollable preview pane to my user that is within the form he or she is using. It would be even cooler if the user could edit the document through this pane. I've done Interop extensively, so I'm well aware of how to write and edit a Word document. I just want to put it into a frame and preview it. I'll probably try to select around the document based on what is changing as the user provides input so they can see what's being changed and where. Thoughts? Thanks

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• how to call windows paint event from child thread

  - by RAJ K

  If I am wrong then please correct me as I am new in this. I have one thread which display image captured from webcam on a windows created using CreateWindowEx() function. Now when i execute my program I can see that my paint code (in WindowProc()) in never reached (called InvalidateRect() from child thread to redraw), checked using breakpoint. Actually frame capture and display is being done in thread and I think because its in child thread and Window is in Main thread that is why its not able to call paint event. Can you help me on this

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• 2D Engine scrolling on OpenGL via hardware?

  - by drudru

  hi, I'm using OpenGL as the bottom end for a 2D tiling engine. When everything is 2D, it is simple to optimize certain issues. For example, scrolling. If I know a certain section of the screen needs to scroll off the bottom, then I can just blit over that portion. I'm evening moving more than 1 pixel at a time. Without explicit hardware support (think old nintendo hw), this requires a lot of pixel writes. An on chip bitblt would be the next best thing. Essentially, I'm looking at how I can optimize my GL calls to use VRAM texture renders as efficient hardware blits. Is it possible to have GL scroll the framebuffer, or should I just resign myself to double-buffering and re-rendering an entire scene for each frame? Thx

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• Blob ID matching over multiple frames in C++ (image analysis)

  - by pollux

  Dear reader, I'm working on a blob matching and tracking library in C++. Currently I'm using openCV to detect blobs and try to match blobs in a new frame by checking the position, velocity and size of the blob. This works quite okay and I'm receiving a high blob match rate (95% or higher). Sometimes blobs fall out of the image or new blobs appear. Now I need to give matched blobs the same ID as they had before. I'm wondering if there are typical or commonly used techniques for doing this. Or even some keywords I can use to google on. Thanks

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• OpenGLES iPhone Depth Blending problem

  - by user359103

  Hi, I am trying to make an OpenGLES 2.0 cube application. The idea was to have a texture (with an alpha 75%) applied to all 6 faces of the cube. This would mean that even if I rotate the cube i would be able to see all 6 faces at any given frame. Now I have enabled depth test(my app needs this!!) and blending. The Depth func is LEQUAL and blend func is SRC_ALPHA, ONE_MINUS_SRC_ALPHA. Now, the issue is that at some cube faces don't show the underlying faces. I am not able to understand this because the logic works fine with the other cube faces. Just for the record, I have disabled CULL_FACE. Thanks in advance. Regards, Puzzler

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• Help with WinAPI scroll bars

  - by user146780

  Right now I have a window with horizontal ad vertical scrollbars. I use these parameters to initialize it. //Set OGL Frame scroll bar SCROLLINFO inf; inf.cbSize = sizeof(SCROLLINFO); inf.fMask = SIF_PAGE | SIF_POS; inf.nPage = 20; inf.nPos = 30; It creates them in the center and I like their size, but when I scroll I multiply by 50 which creates chopiness. How could I add more resolution to the bars and still keep the same thumb size. Is there a way I can calculate the size and position of the bar based on the above parameters? Thanks

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• Make a call in Objective C help!

  - by Henry D'Andrea

  I need to make a call where it says add call here. Can someone help? (BOOL) webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)ntype { NSLog(@"Scheme: %@", request.URL.scheme); if ([request.URL.scheme isEqualToString:@"save"]) { //Add Call here } return true; } FROM this code- (void) save { UIGraphicsBeginImageContext(self.view.frame.size); [self.view.layer renderInContext:UIGraphicsGetCurrentContext()]; UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); UIImageWriteToSavedPhotosAlbum(viewImage, nil, nil, nil); NSLog(@"TEST"); }

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• Invisible JFrame/JTable how much faster ?

  - by chacko

  I have a swing app. with a jframe with lots of internal frames containing large JTable. Those jtables get updated continuously so there is lots of repainting going on. in some circumstances I can simply keep the JFrame invisible. (frame.setVisible(false)) I was wondering if anybody knows if I will gain something in terms of performance (something considerable or not) such as 50% gain or you would only get 2% gain... and maybe some sort of explaination on what to expect. thanks

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• Passing arguments to UILabel [ 2 ] *

  - by DesperateLearner

  I'm trying to call a method of the below (Scroll animation class) type from a viewcontroller class. -(void)CreateLabel:(CGRect )frame andLabel:(UILabel *[NUM_LABELS])label andview:(UIView *)view; I got some errors when I tried passing the argument. Any suggestion on how to call this? This is how I called that method ScrollAnimation *newAnimation = [[ScrollAnimation alloc] init]; [newAnimation CreateLabel:CGRectMake(0, 50, 300,30) andLabel:animateLabel[NUM_LABELS] andview:self.view]; I have the error /Volumes/Red Drive/CarTransition/CarTransition/ViewController.m:120:66: Implicit conversion of an Objective-C pointer to 'UILabel **' is disallowed with ARC /Volumes/Red Drive/CarTransition/CarTransition/ViewController.m:120:66: Incompatible pointer types sending 'UILabel *__strong' to parameter of type 'UILabel **'

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• determine if point on screen is within specific UIScrollView subview

  - by Kyle

  A UIScrollView contains several UIView objects; how can I tell if a point on the screen not generated by touches is within a specific subview of the scrollview? so far atempts to determine if the point is in the subview always return the first subview in the subviews array of the parent scrollview, ie the coordinates are relative to the scrollview, not the window. Here's what I tried (edited) -(UIView *)viewVisibleInScrollView { CGPoint point = CGPointMake(512, 384); for (UIView *myView in theScrollView.subviews) { if(CGRectContainsPoint([myView frame], point)) { NSLog(@"In View"); return myView; } } return nil; }

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• UIImage in UIView and display image parts out of bounds

  - by Mpampinos Holmens

  I have an image in a subview that is bigger than the subview it self, is it possible to display parts of the image that are out of the subview! have tried the view.clipsToBounds=NO; but no lack still. here is part of my code so far. xRayView = [[XRayView alloc] initWithFrame: CGRectMake((1024 - 800) / 2, self.device.frame.origin.y - 26, 800,530)]; xRayView.clipsToBounds=NO; [xRayView setForgroundImage: [UIImage imageWithContentsOfFile: [[NSBundle mainBundle] pathForResource: @"xray_foreground_01" ofType: @"png"]]]; [xRayView setBackgroundImage: [UIImage imageWithContentsOfFile: [[NSBundle mainBundle] pathForResource: @"xray_background_01" ofType: @"png"]]]; the foreground and the background images are bigger than the xray view

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• Navigate a website with Excell Vba

  - by Ommit

  I can pull data from known ulr, but can I navigate a website with excel. For example can excel do a google search and put the results on a spreadsheet. Or navigate an in-frame site. This code pulls data from a website. With ActiveSheet.QueryTables.Add(Connection:= _ PUT_URL_HERE, _ Destination:=Range("A1")) .Name = "I need serious help" .FieldNames = True .RowNumbers = False .FillAdjacentFormulas = False .PreserveFormatting = True .RefreshOnFileOpen = False .BackgroundQuery = True .RefreshStyle = xlInsertDeleteCells .SavePassword = False .SaveData = True .AdjustColumnWidth = False .RefreshPeriod = 0 .WebSelectionType = xlAllTables .WebFormatting = xlWebFormattingNone .WebPreFormattedTextToColumns = True .WebConsecutiveDelimitersAsOne = True .WebSingleBlockTextImport = False .WebDisableDateRecognition = False .WebDisableRedirections = False .Refresh BackgroundQuery:=False End With

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• What method of UIView gets called when instantiated from a NIB?

  - by retailevolved

  I have a simple custom view that is connected via outlet to a NIB. For this particular view, there are actions that I would like to perform on the view when it is initialized, no matter what NIB it is on. Trouble is, neither the (id)init or the (id)initWithFrame:(CGRect)frame methods are getting called on the custom view. Which method gets called on a UIView when it is instantiated from a NIB? I would just use the view controller and viewDidLoad method except that this particular view appears on a lot of different NIBs.

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• Accessing 'data' argument of with() function?

  - by Ken Williams

  Is it possible, in the expr expression of the with() function, to access the data argument directly? Here's what I mean conceptually: > print(df) result qid f1 f2 f3 -1 1 0.0000 0.1253 0.0000 -1 1 0.0098 0.0000 0.0000 1 1 0.0000 0.0000 0.1941 -1 2 0.0000 0.2863 0.0948 1 2 0.0000 0.0000 0.0000 1 2 0.0000 0.7282 0.9087 > with(df, subset(.data, select=f1:f3)) # Doesn't work Of course the above example is kind of silly, but it would be handy for things like this: with(subset(df, f2>0), foo(qid, vars=subset(.data, select=f1:f3))) I tried to poke around with environment() and parent.frame() etc., but didn't come up with anything that worked. Maybe this is really a question about eval(), since that's how with.default() is implemented.

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• How would I go about implementing a stopwatch with different speeds?

  - by James

  Ideally I would like to have something similar to the Stopwatch class but with an extra property called Speed which would determine how quickly the timer changes minutes. I am not quite sure how I would go about implementing this. Edit Since people don't quite seem to understand why I want to do this. Consider playing a soccer game, or any sport game. The halfs are measured in minutes, but the time-frame in which the game is played is significantly lower i.e. a 45 minute half is played in about 2.5 minutes.

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• Debugging compiled .NET 2.0 application

  - by brovar

  I don't know if I'll pass all the necessary information here, but I've only been asked to post this question here and I'm not entirely onto the matter. There is a .NET Framework 2.0 application compiled in the Debug mode with the parameter jitDebugging set to true in app.config <system.windows.forms jitDebugging="true" /> After any crash we get the dialog box allowing us to send a report or to debug the program. When we choose to debug and select proper VS, the IDE starts but with the announcement: No symbols are loaded for any call stack frame. The source code cannot be displayed. and Disassembly cannot be displayed in run mode. Is there any possiblity to see the code or the spot where the crash has occured?

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• How to stop a preloader stalling a flash movie in IE

  - by rogersoli

  This is only a problem in IE. the following actionscript is for a simple preloader for a movie i'm working on. It works fine in Firefox but the movie stops on the first frame when opened with Internet Explorer. Has anyone had this problem before? stop(); addEventListener(Event.ENTER_FRAME,checkLoad); function checkLoad(e:Event):void { var pcent:Number=this.loaderInfo.bytesLoaded /this.loaderInfo.bytesTotal*100; bar_mc.scaleX=pcent/100; loader_txt.text=int(pcent)+"%"; if (pcent==100) { removeEventListener(Event.ENTER_FRAME,checkLoad); this.gotoAndPlay(2); } }

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• matlab: simple matrix filtering - group size

  - by Art

  I have a huuuge matrix storing information about X and Y coordinates of multiple particle trajectories , which in simplified version looks like that: col 1- track number; col 2- frame number; col 2- coordinate X; col 3- coordinate Y for example: A = 1 1 5.14832 3.36128 1 2 5.02768 3.60944 1 3 4.85856 3.81616 1 4 5.17424 4.08384 2 1 2.02928 18.47536 2 2 2.064 18.5464 3 1 8.19648 5.31056 3 2 8.04848 5.33568 3 3 7.82016 5.29088 3 4 7.80464 5.31632 3 5 7.68256 5.4624 3 6 7.62592 5.572 Now I want to filter out trajectories shorter than lets say 2 and keep remaining stuff like (note renumbering of trajectories): B = 1 1 5.14832 3.36128 1 2 5.02768 3.60944 1 3 4.85856 3.81616 1 4 5.17424 4.08384 2 1 8.19648 5.31056 2 2 8.04848 5.33568 2 3 7.82016 5.29088 2 4 7.80464 5.31632 2 5 7.68256 5.4624 2 6 7.62592 5.572 How to do it efficiently? I can think about some ideas using for loop and vertcat, but its the slowest solution ever :/ Thanks!

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• Change backgroundcolor for UIButton IPhone

  - by lightwave

  I have a problem. I use a Button as a BarButtonItem. It works fine so far, but my backgroundcolor works only if I click on my button. How can I make it so that my backgroundcolor will be set every time ? UIButton *redEmergencyButton = [[UIButton buttonWithType:UIButtonTypeRoundedRect] retain]; redEmergencyButton.frame = CGRectMake(100, 100, 100, 50); redEmergencyButton.backgroundColor = [UIColor colorWithRed:0.8 green:0.898039215686274509803 blue:1.0 alpha:1.0]; [redEmergencyButton setTitle:@"Emergency" forState:UIControlStateNormal]; [redEmergencyButton addTarget:self action:@selector(doEmergency) forControlEvents:UIControlEventTouchUpInside]; UIBarButtonItem *rButton = [[UIBarButtonItem alloc] initWithCustomView:redEmergencyButton];

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• building website with menu without using frames

  - by kms333

  With Dreamweaver, I use frames to define a left column menu, and clicking on each menu tab would change the html page displayed on the right frame. However, webdesign tools such as kompozer do not support frames. 1 - What is the best way to design a html personal webpage with such menu bars, without using frames ? 2 - If html is not enough, what other scripting languages would you recommend to learn for someone with Java background and have basic knowledge of html and css. 3 - What web-design tools would you recommend to build a personal website ?

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• uiscrollview not scrolling horizontally

  - by Futur

  My UIScrollView below is not scrolling horizontally, Please help me here.. FirstView = [[UIView alloc] initWithFrame:CGRectMake(60, 0, 100, 150)]; [FirstView setBackgroundColor:[UIColor clearColor]]; SecondView = [[UIView alloc] initWithFrame:CGRectMake(320+60, 0, 100, 150)]; [SecondView setBackgroundColor:[UIColor clearColor]]; HolderView = [[UIView alloc]initWithFrame:CGRectMake(0, 0, 1000, 150)]; scrHorizontalScroll = [[UIScrollView alloc]initWithFrame:HolderView.frame]; [scrHorizontalScroll setBackgroundColor:[UIColor redColor]]; [scrHorizontalScroll setContentSize:CGSizeMake(999, 150)]; [scrHorizontalScroll setScrollEnabled:YES]; [HolderView addSubview:scrHorizontalScroll]; The HolderView is not scrolling horizontally but which happen, please help

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• For each level of factor aggregate values over all levels except the current one (in R)

  - by Andrey Chetverikov

  For each level of factor I need to extract values aggregated over all subsets of data.frame except the current one. For example, there is a several subjects doing a reaction time task during several days, and I need to compute mean reaction time for all subjects and all days, but not including the subject for whom the mean is computed. Currently, I do it like this: library(lme4) ddply(sleepstudy, .(Subject, Days), summarise , avg_rt=mean(sleepstudy[sleepstudy$Subject!=Subject&sleepstudy$Days==Days,"Reaction"]), .progress="text") It works fine for small data sets, but for large ones it can be very slow. Is there a way to do it faster?

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• What technologies to use for a particle system with enormous calculation demand?

  - by Amir Rezaei

  I have a particle system with X particles. Each particle tests for collision with other particles. This gives X*X = X^2 collision tests per frame. For 60f/s, this corresponds to 60*X^2 collision detection per second. What is the best technological approach for these intensive calculations? Should I use F#, C, C++ or C#, or something else? The following are constraints The code is written in C# with the latest XNA Multi-threaded may be considered No special algorithm that tests the collision with the nearest neighbors or that reduces the problem The last constraint may be strange, so let me explain. Regardless constraint 3, given a problem with enormous computational requirement what would be the best approach to solve the problem. An algorithm reduces the problem; still the same algorithm may behave different depending on technology. Consider pros and cons of CLR vs native C.

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• [Ext.tree.TreePanel] getNodeById does not work

  - by Moon

  Hi, I have a ext treepanel with json. var tree = new Ext.tree.TreePanel({ renderTo:'tree-container', title: 'Category', height: 300, width: 400, useArrows:true, autoScroll:true, animate:true, enableDD:true, containerScroll: true, rootVisible: false, frame: true, root: { text: 'Category', draggable: false, id: '0' }, // auto create TreeLoader dataUrl: $("#web").val() + "/category/index/get-nodes", listeners: { 'checkchange': function(node, checked){ if(checked){ categoryManager.add(node.id); //node.getUI().addClass('complete'); }else{ categoryManager.remove(node.id); // node.getUI().removeClass('complete'); } } } }); dataUrl loads the following json code [{"text":"Code Snippet","id":"1","cls":"folder","checked":false,"children":[{"text":"PHP","id":"3","cls":"file","checked":false,"children":[]},{"text":"Javascript","id":"4","cls":"file","checked":false,"children":[]}]}] when I try to find a node by console.log( tree.getNodeByid(3) ), it shows that it is undefined. Do I have a problem with my code?

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