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  • Another getcwd question...

    - by rubenvb
    Sorry to keep hammering on this, but I'm trying to learn :). Is this any good? And yes, I care about memory leaks. I can't find a decent way of preallocating the char*, because there simply seems to be no cross-platform way. const string getcwd() { char* a_cwd = getcwd(NULL,0); string s_cwd(a_cwd); free(a_cwd); return s_cwd; }

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  • Play a Sound with Python

    - by Claudiu
    What's the easiest way to play a sound file (.wav) in Python? By easiest I mean both most platform independent and requiring the least dependencies. pygame is certainly an option, but it seems overkill for just sound.

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  • SWT-like GUI toolkit for C

    - by user345409
    Hello, do you know any cross-platform gui toolkit like swt for C (using default widgets in each operating system = right pics on eclipse.org/swt) ? There is an implementation of swt for D language called DWT but I need it for C or C++. Thanks.

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  • Is there a Windows equivalent for eventfd?

    - by Leaurus
    I am writing a cross-platform library which emulates sockets behaviour, having additional functionality in the between (App-mylib-sockets). I want it to be the most transparent possible for the programmer, so primitives like select and poll must work with accordingly with this lib. The problem is when data becomes available (for instance) in the real socket, it will have to go through a lot of processing, so if select points to the real socket fd, app will be blocked a lot of time. I want the select/poll to unblock only when data is ready to be consumed (after my lib has done all the processing). So I came across this eventfd which allows me to do exactly what I want, i.e. to manipule select/poll behaviour on a given fd. Since I am much more familiarized with Linux environment, I don't know what is the windows equivalent of eventfd. Tried to search but got no luck. Anyone can help me, please?

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  • UINavigationBar height

    - by kpower
    In my app I work with an UINavigationController. I've added it to the window (MainWindow.xib, with IB) and simulated on my main view (in IB: Simulated User Elements / Top Bar / Navigation Bar). Navigation bar is displayed, but its height isn't standard. At least in IB it is bigger than in launched app. What's wrong? And how can I restore height to the initial state (as in IB)? P.S.: I know that I can set it directly from code. But this way looks like a "crutch".

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  • Hive Based Registry in Flash

    - by Psychic
    To start with I'll say I've read the post here and I'm still having trouble. I'm trying to create a CE6 image with a hive-based registry that actually stores results through a reboot. I've ticked the hive settings in the catalog items. In common.reg, I've set the location of the hive ([HKEY_LOCAL_MACHINE\init\BootVars] "SystemHive") to "Hard Drive\Registry" (Note: the flash shows up as a device called "Hard Drive") In common.reg, I've set "Flags"=dword:3 in the same place to get the device manager loaded along with the storage manager I've verified that these settings are wrapped in "; HIVE BOOT SECTION" This is where it starts to fall over. It all compiles fine, but on the target system, when it boots, I get: A directory, called "Hard Disk" where a registry is put A device, name called "Hard Disk2" where the permanent flash is Any changes made to the registry are lost on a reboot What am I still missing? Why is the registry not being stored on the flash? Strangly, if I create a random file/directory in the registry directory, it is still there after a reboot, so even though this directory isn't on the other partition (where I tried to put it), it does appear to be permanent. If it is permanent, why don't registry settings save (ie Ethernet adapter IP addresses?) I'm not using any specific profiles, so I'm at a loss as to what the last step is to make this hive registry a permanent store.

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  • Convert Environment.OSVersion to NTDDI version format

    - by David Brown
    In sdkddkver.h of the Windows Platform SDK, there are various OS versions defined as NTDDI_*. For example, Windows XP and its service packs are defined as: #define NTDDI_WINXP 0x05010000 #define NTDDI_WINXPSP1 0x05010100 #define NTDDI_WINXPSP2 0x05010200 #define NTDDI_WINXPSP3 0x05010300 #define NTDDI_WINXPSP4 0x05010400 There are also masks which, along with the OSVER, SPVER, and SUBVER macros, allow you to pull the respective parts out of the NTDDI version. #define OSVERSION_MASK 0xFFFF0000 #define SPVERSION_MASK 0x0000FF00 #define SUBVERSION_MASK 0x000000FF I have all of these defined as constants in C# and what I'd like to do now is convert the data returned by Environment.OSVersion to a value corresponding to one of the NTDDI versions in sdkddkver.h. I could make a massive switch statement, but that's not really as future-proof as I'd like it to be. I would need to update the conversion method every time a new OS or service pack is released. I have a feeling this could be done with the help of some bitwise operators, but I'll be honest and say that those aren't my strong point. I appreciate any help!

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  • how to change UIPageControl dots

    - by user321130
    greetings! I've seen apps (e.g. meebo) that have different indicators on UIPageControls instead of the default white circles. is there an easy way to do this? I've read the docs for UIPageControls and it seems that there is no methods to replace the images. thank you

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  • When overriding initWithCoder is it always necessary to call [super initWithCoder: coder]

    - by Evan
    In this code I am loading a View Controller (and associated View) from a .xib: -(id)initWithCoder:(NSCoder *)coder { [super initWithCoder:coder]; return self; } This successfully works, but I do not really understand what the line [super initWithCoder:coder] is accomplishing. Is that initializing my View Controller after my View has been initialized? Please be as explicit as possible when explaining. Thanks.

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  • - Button's positioning on UIToolBar in IB -

    - by gotye
    Hey guys, As a fervent adept of IB, I created a UIToolBar (in IB of course) and added to it a few buttons. So far so good ... but then I tried to move each of them to the right position but IB doesn't let me do it ... Each time I try to scroll them IB moves them back to the former position ! Is there a way to choose their position in IB ? If not, could you give me a piece of code for me to choose their position programatically ? (sigh :D) Thanks, Gotye.

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  • Setting width of UISegmentedControl after removing a segment

    - by David Foster
    I have a UISegmentedControl of width 280. In code, I need to remove the third segment, set the UISegmentedControl's width to 200 and then re-centralise. By configuring the springs and struts in IB, I have set the segmented control up such that when I set the width directly it will automatically re-centre. However, when setting the width in code, is it true I need to set it via -setFrame? If this is the case, then I also need to set its X origin, which renders my auto-centralising redundant. My code: [segmentedControl removeSegmentAtIndex:2 animated:NO]; [segmentedControl setFrame:CGRectMake(segmentedControl.frame.origin.x + ((segmentedControl.frame.size.width - TWO_SEGMENT_SEGMENTED_CONTROL_WIDTH) / 2), segmentedControl.frame.origin.y, TWO_SEGMENT_SEGMENTED_CONTROL_WIDTH, segmentedControl.frame.size.height)]; This works, but seems hugely overblown for my purposes. Is there really no simpler way to set solely the width of the control in code?

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  • TVirtualStringTree - resetting non-visual nodes and memory consumption

    - by Remy Lebeau - TeamB
    I have an app that loads records from a binary log file and displays them in a virtual TListView. There are potentially millions of records in a file, and the display can be filtered by the user, so I do not load all of the records in memory at one time, and the ListView item indexes are not a 1-to-1 relation with the file record offsets (List item 1 may be file record 100, for instance). I use the ListView's OnDataHint event to load records for just the items the ListView is actually interested in. As the user scrolls around, the range specified by OnDataHint changes, allowing me to free records that are not in the new range, and allocate new records as needed. This works fine, speed is tolerable, and the memory footprint is very low. I am currently evaluating TVirtualStringTree as a replacement for the TListView, mainly because I want to add the ability to expand/collapse records that span multiple lines (I can fudge it with the TListView by incrementing/decrementing the item count dynamically, but this is not as straight forward as using a real tree). For the most part, I have been able to port the TListView logic and have everything work as I need. I notice that TVirtualStringTree's virtual paradigm is vastly different, though. It does not have the same kind of OnDataHint functionality that TListView does (I can use the OnScroll event to fake it, which allows my memory buffer logic to continue working), and I can use the OnInitializeNode event to associate nodes with records that are allocated. However, once a tree node is initialized, it sees that it remains initialized for the lifetime of the tree. That is not good for me. As the user scrolls around and I remove records from memory, I need to reset those non-visual nodes without removing them from the tree completely, or losing their expand/collapse states. When the user scrolls them back into view, I can re-allocate the records and re-initialize the nodes. Basically, I want to make TVirtualStringTree act as much like TListView as possible, as far as its virtualization is concerned. I have seen that TVirtualStringTree has a ResetNode() method, but I encounter various errors whenever I try to use it. I must be using it wrong. I also thought of just storing a data pointer inside each node to my record buffers, and I allocate and free memory, update those pointers accordingly. The end effect does not work so well, either. Worse, my largest test log file has ~5 million records in it. If I initialize the TVirtualStringTree with that many nodes at one time (when the log display is unfiltered), the tree's internal overhead for its nodes takes up a whopping 260MB of memory (without any records being allocated yet). Whereas with the TListView, loading the same log file and all the memory logic behind it, I can get away with using just a few MBs. Any ideas?

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  • UIButton doesn't appear on UIToolbar

    - by Sheehan Alam
    I have a UIToolbar where I have dragged a UIButton. When I set the button properties to Custom, and assign an image (or background image) the graphics don't appear. However, when I give it a custom text, the text will appear. Why is it that the images don't appear?

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  • UISwitch propagate state

    - by Reonarudo
    Hello, I'm still rather new to iPhone development and I tried something I didn't it was possible. I have a UIView for my TableView Section Header with a switch on it, and I also have a UITableCellView with another Switch on it. It all looks fine, but now I want to propagate the UISwitch state from the section header to all the UISwitches on the section rows. Can anyone enlighten me how can I accomplish this? Thank you.

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  • Custom UITableViewCell with 2 UILabel's resized

    - by petert
    I'm struggling to create a custom UITableViewCell (in IB) that has a UIImageView on the left, fixed to the top left corner, then 2 UILabel's adjacent to it, side by side. So the cell looks something like: +---------------------------+ | IMAGE LABEL1 LABEL2 > | +---------------------------+ What I cannot seem to do is to change the frame of LABEL1 so it fits the text is contains, then make sure LABEL2 moves to the left (or right) so it ends up directly adjacent to it, filling all the space for the rest of the cell. So, concentrating on the label text, I'd like cell to look like this: +---------------------------+ | IMAGE Call 123456 > | +---------------------------+ after I've set LABEL1 to "Call" and LABEL2 to "123456" in: - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath Actually I can resize LABEL1 with this: CGSize sizeToMakeLabel = [label.text sizeWithFont:label.font]; label.frame = CGRectMake(label.frame.origin.x, label.frame.origin.y, sizeToMakeLabel.width + 3, sizeToMakeLabel.height); Now the frame for the text "Call" fits this text (confirmed by setting a background color), but the text "123456" doesn't seem to shift to the left, whatever autosizing I set in IB, or methods to resize the cells view? I seem to need the +3 to make sure "Call" didn't look like this "C…" also? I'm using 2 labels so LABEL1 can be in a bold font say.

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  • flex transition effects works on 2nd and after transition, but not on very first transition

    - by Rees
    i have a flex app that transitions between 2 states with the toggle of a button. my issue is that the effect of fading only seems to work on the 2nd transition and after. However, for my first transition... going from State1 to studyState... there is no fade effect whatsoever, in fact the components in state1 disappear completely (the footer fills the empty gap where the "body" use to be) and then the flex recreates the studyState (without any fade refilling the "body" with components only in studyState). After this first transition however, going between studyState and State1 working COMPLETELY fine.. why does this happen and how can i make it so that crossfade works STARTING FROM THE VERY FIRST TRANSITION? please help! <s:VGroup id="globalGroup" includeIn="State1" width="100%"></Vgroup> <s:VGroup id="studyGroup" includeIn="studyState" width="100%"></Vgroup>

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  • Binding the textDidChange event on a NSTextField to a MacRuby delegate

    - by kolrie
    I have a NSTextField within a Window and I created a very simple MacRuby delegate: class ServerInputDelegate attr_accessor :parent def textDidChange(notification) NSLog notification.inspect parent.filter end end And I have tried setting the control's delegate: I have tried setting the Window and every other object I could think of to this delegate. I have also tried setting it to other delegates (application for instance) and events like applicationDidFinishLaunching are being properly triggered. Is there any trick I am missing in order for this event to be triggered every time the contents of this NSTextField changes?

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  • Getting a WebView to act exactly like Safari

    - by Kelly McDonald
    (edited to give a better description of the answer I gave) I have created a very simple browser in InterfaceBuilder consisting of a nav bar and a webview. Everything works fine except when I try to tab between input fields is the webview, the focus goes to the nav bar. I'm assuming I need to do something with the responder chain, but I haven't been able to figure out what. Any advice? Thanks, Kelly

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  • 'NSInvalidArgumentException' UIButton IBAction Error

    - by Graeme
    Hi, I have a button in a view which refuses to work. I've got in working in a blank, default view application from X-Code, but in none of my applications will it work, instead it gives me the following error. Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '* -[UIViewController showVicInfo:]: unrecognized selector sent to instance 0x3c084f0' The debugger isn't any help either. I've made sure that I hook up the button to the file's owner (not the other way around) as well. Below is the code for the action. And I know it's not the alert view, because the breakpoint doesn't even reach there. about.h @interface about : UIViewController { } -(IBAction)showInfo:(id)sender; about.m -(IBAction)showVicInfo:(id)sender { UIAlertView *myAlert = [[UIAlertView alloc] initWithTitle:@"No Internet Connection" message:@"You require an internet connection via WiFi or cellular network for iFirelert to work." delegate:self cancelButtonTitle:@"OK, thanks" otherButtonTitles:nil]; [myAlert show]; [myAlert release]; }

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