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• How to get the last windows active time by windows api

  - by Edwin Tai

  In general, the Screensaver will run when we do nothing for a period of time. Now i wanna know how to get the unactive time. In another word,i want to make a program which would run a function if we do nothing for a period of time. Now i can use mouse or keyboard hook to solve the problem. But you know,it needs administrator permissions. In another word,if in win vista or win 7,it is nauseating because of the UAC. I need an API such to get last windows active time.

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• Qt - invalid conversion to child class

  - by David Davidson

  I'm drawing polygons using the Graphics View framework. I added a polygon to the scene with this: QGraphicsPolygonItem *poly = scene->addPolygon(QPolygonF(vector_of_QPointF)); poly->setPos(some_point); But I need to implement some custom behaviour like selection, mouse over indicator, and other similar stuff on the graphics item. So I declared a class that inherits QGraphicsPolygonItem: #include <QGraphicsPolygonItem> class GridHex : public QGraphicsPolygonItem { public: GridHex(QGraphicsItem* parent = 0); }; GridHex::GridHex(QGraphicsItem* parent) : QGraphicsPolygonItem(parent) { } Not doing much with that class so far, as you can see. But shouldn't replacing QGraphicsPolygonItem with my GridHex class? This is throwing a " invalid conversion from 'QGraphicsPolygonItem*' to 'GridHex*' " error: GridHex* poly = scene->addPolygon(QPolygonF(vector_of_QPointF)); What am I doing wrong?

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• Jquery clickable block

  - by Clint

  HI, I have this code for extracting the href and adding it to a parent block... $(".new-dev").hover(function(){ $(this).css('cursor','pointer'); $('this').$('a').css('color','#696969'); },function(){ $('this').$('a').css('color','#000'); }); What I want to do is make the a within the block change color on rollover. Unsure of how to do this when using $(this). Any advice welcome. Thanks, C

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• CSS Menu loses focus when part of jquery hover()

  - by Steve Syfuhs

  I have the following html (viewable at www.communityftw.com) <table width="100%"> <tr> <td style="text-align: left"> <!-- 2008.3.1314.35 --><span id="headerSearch1_sb_form_q_wrapper" class="RadInput_Default" style="white-space:nowrap;"><input value="language..." type="text" size="20" id="headerSearch1_sb_form_q_text" name="headerSearch1_sb_form_q_text" class="riTextBox riEmpty sw_qboxTop" name="q" style="width:140px;" /><input id="headerSearch1_sb_form_q" name="ctl00$headerSearch1$sb_form_q" class="rdfd_" style="visibility:hidden;margin:-18px 0 0 0;width:1px;height:1px;overflow:hidden;border:0;padding:0;" type="text" value="" /><input id="headerSearch1_sb_form_q_ClientState" name="headerSearch1_sb_form_q_ClientState" type="hidden" /></span> <input type="submit" name="ctl00$headerSearch1$sb_form_go" value="" id="headerSearch1_sb_form_go" class="sw_qbtnTop" /> </td> <td style="text-align: left"> <ul id="menu"> <li class="languageContainer"> <div> <a href="#" id="languageField"> <img src="/images/flags/ca.png" alt="Canada" /> Canada (English)</a> </div> <ul id="language"> <li><a href="#" id="A1"> <img src="/images/flags/ca.png" alt="Canada" /> Canada (French)</a> </li> <li><a href="#" id="A2"> <img src="/images/flags/us.png" alt="United States" /> United States</a> </li> <li><a href="#" id="A3"> <img src="/images/flags/de.png" alt="Germany" /> Germany</a> </li> <li><a href="#" id="A4"> <img src="/images/flags/fr.png" alt="France" /> France</a> </li> <li><a href="#" id="A5"> <img src="/images/flags/ru.png" alt="Russia" /> Russia</a> </li> <li class="last"> <img alt="" src="images/langLocDrop_r4_c1.png" /> </li> </ul> </li> </ul> </td> </tr> </table> Javascript/jquery $('#slide').animate({ top: '-=34' }, 1000); $("#slide").hover(function () { $(this).animate({ top: '+=34' }); }, function () { $(this).animate({ top: '-=34' }); }); menu { margin: 0px; padding: 0px; list-style: none; display: inline-block; float: left; z-index: 1000; } menu a { color: #dc2525; text-decoration: none; } menu li { background: none repeat scroll 0 0; cursor: pointer; float: left; position: relative; } menu li a:hover { color: orange; } menu ul { padding: 0px; margin: 0px; display: block; display: inline; } menu li ul { position: absolute; left: -15px; top: 0px; margin-top: 20px; width: 170px; line-height: 16px; background-image: url(/images/langLocDrop_r2_c1.png); display: none; } menu li:hover ul { display: block; } menu li ul li { display: block; margin: 5px 20px; padding: 5px 0px; border-top: dotted 1px #606060; list-style-type: none; } menu li ul li:first-child { border-top: none; } menu li ul li a { display: block; } menu li ul li a:hover { color: orange; } .languageContainer div { display: inline; padding: 5px; } languageField img { display: inline; vertical-align: middle; } language img { display: inline; } menu .last { background: transparent none repeat scroll 0% 0%; margin: 0px; padding: 0px; border: none; position: relative; border: none; height: 0px; } What I'm trying to do is have a menu mostly hidden at the top except when you mouse over it, and then have a submenu (just css driven) pop out when you mouse over the language. What is happening though is that when I move onto the language list, and I go past Germany (~50% down the list?), the hover() loses focus and closes the original menu, which closes the language menu. Any idea's what is causing the issue? Any ideas how to fix the issue? I have tried the hoverIntent() plugin as well to no avail.

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• Objective c key path operators @avg,@max .....

  - by davide

  arr = [[NSMutableArray alloc]init]; [arr addObject:[NSNumber numberWithInt:4]]; [arr addObject:[NSNumber numberWithInt:45]]; [arr addObject:[NSNumber numberWithInt:23]]; [arr addObject:[NSNumber numberWithInt:12]]; NSLog(@"The avg = %@", [arr valueForKeyPath:@"@avg.intValue"]); This code works fine, but why? valueForKeyPath:@"@avg.intValue" is requesting (int) from each NSNumber, but we are outputting a %@ string in the log. If i try to output a decimal %d i get a number that possibly is a pointer to something. Can somebody explain why the integers become NSNumbers when i call the @avg operator?

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• How to determine pixel color of System.Windows.Controls.Image?

  - by csciguy

  I have an Image from (System.Windows.Controls.Image). This image is positioned on a main canvas. I want to determine the alpha channel value of the mouse cursor when I click on any portion of this image. When doing something like the following, I'm getting an exception. {"Value does not fall within the expected range."} System.Exception {System.ArgumentException} Code: try{ CroppedBitmap cb = new CroppedBitmap(ac.displayImage.Source as BitmapSource, new Int32Rect((int)mousePoint.X, (int)mousePoint.Y, 1, 1)); byte[] pixels = new byte[4]; cb.CopyPixels(pixels, 4, 0); } catch (Exception ex) { System.Diagnostics.Debug.WriteLine(ex.Message); } The mousePoint.X, and mousePoint.Y are obtained when the user clicks on the main window. Is there a better way to do this?

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• flex chat/telnet application send/receive same window in TextArea

  - by Renassaince Geek

  Hi there, Just wanting to know if anybody has seen an example of a telnet/chat or other console like FLEX application where you can use the same TextArea as input/ouput area. I've been trying to modify the app at: http://livedocs.adobe.com/flex/3/html/17_Networking_and_communications_8.html but so far, computer says no. All the implementations I've seen use a combination of TextInput and TextArea. The challenge is that we'll be using this app to telnet into some old routers and we'll need to do a fair amount of copy/pasting. Based on what I've seen, it seems that I would need to point the mouse into the TextInput in order to be able to right click and paste, which is not very sleak..... Your thoughts, Fran

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• Struct size containing vector<T> different sizes between DLL and EXE..

  - by Michael Peddicord

  I have this situation where an EXE program imports a DLL for a single function call. It works by passing in a custom structure and returning a different custom structure. Up till now it's worked fine until I wanted one of the structs data members to be a vector < MyStruct When I do a sizeof(vector< MyStruct ) in my program I get a size of 20 but when I do it from inside the DLL I get a size of 24. This size inconsistency is causing a ESP pointer error. Can anyone tell me why a Vector < MyStruct would be a different size in the DLL than in the program? I have reverified that my structs in both the DLL and the Program are identical. I would appreciate any help on the subject. Thank you.

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• How can I create a collection of references in C#

  - by Jonathan Kaufman

  Ok I am having a cross language hiccup. In C# with it's great collections like List and I have: a Map class with properties of: List<byte[]> Images; List<Tile> Tiles; a Tile Class of: byte[] ImageData; int X; int Y; Now I want to add an image to the Map class and have the ImageData property of the Tile Classes to "reference" it. I have discovered I can't just assign it Images[0]. You can't have a reference to an object of a List. My fix was to create a Dictionary. Is this the best way or can I somehow have a "pointer" to a collection of objects?

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• Is there a way to efficiently update one value in dojo chart2d?

  - by Nick Orlowski

  I am looking for a way to update one and only one value in a dojox chart2d. There is a way to update an entire series, which involves mychart.updateSeries("myseriesname",array_of_data) mychart.render() but This is too slow for my application. What I want to do is be able to drag the mouse over a vertical bar chart and have the values change as I am doing it. Only one or two values will need to change, so there is no need to reload all of the plots, just the two or three values that are changing. Is there a method that will quickly update only one or two values without lag? Thanks, Nick O I may just end up writing my own css version :S

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• HierarchicalDataTemplate Link By Parent

  - by Andrew Kalashnikov

  Hello colleagues. I want bind my treeview. There are a lot of samples binding treeview by object, which contains children collection. I've got domain having just Parent pointer. public class Service : BaseDomain { public virtual string Name { get; set; } public virtual string Description { get; set; } public virtual Service Parent { get; set; } } Can I bind collection of this objects to my treeView. Thanks

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• Advanced LINQ Update Statement

  - by user1902490

  I have a data base with Price_old like: Date --- Hour --- Price _____________________________ Jan 1 --- 1 --- $3.0 Jan 1 --- 2 --- $3.1 Jan 1 --- 3 --- $3.3 Jan 1 --- 4 --- $3.15 Jan 2 --- 1 --- $2.95 Jan 2 --- 2 --- $3.2 Jan 2 --- 3 --- $3.05 What I then have is a spreadsheet, with the same structure, that I will be reading into a datatable, I'll call the new datatable Price_New, note that price new may not have all the same date/hours as Price_Old So, I end up with 2 datatables, Price_Old, and Price_New, and what I need to do is update Price_old with the new prices in Price_New, and then commit those new prices to the Database. I am kinda new to LINQ (about 30 mins of experience) and would really appreciate if someone could give me a pointer or two on whether or not this is doing in LINQ and what the best method would be. Thanks

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• C# SendMessage to C++ WinProc

  - by jws

  I need to send a string from C# to a C++ WindowProc. There are a number of related questions on SO related to this, but none of the answers have worked for me. Here's the situation: PInvoke: [DllImport("user32", CharSet = CharSet.Auto)] public extern static int SendMessage(IntPtr hWnd, uint wMsg, IntPtr wParam, string lParam); C#: string lparam = "abc"; NativeMethods.User32.SendMessage(handle, ConnectMsg, IntPtr.Zero, lparam); C++: API LRESULT CALLBACK HookProc (int code, WPARAM wParam, LPARAM lParam) { if (code >= 0) { CWPSTRUCT* cwp = (CWPSTRUCT*)lParam; ... (LPWSTR)cwp->lParam <-- BadPtr ... } return ::CallNextHookEx(0, code, wParam, lParam); } I've tried a number of different things, Marshalling the string as LPStr, LPWStr, also tried creating an IntPtr from unmanaged memory, and writing to it with Marshal.WriteByte. The pointer is the correct memory location on the C++ side, but the data isn't there. What am I missing?

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• Keyboard shortcut for Jump to Definition

  - by Arne Evertsson

  I'm looking for a keyboard only shortcut for Jump to Definition. The built-in shortcut requires the mouse: Cmd + Double click. I've tried to add a regular keyboard shorcut for the Edit / Find / Jump to Defintion menu command, but, alas, it will only work when the method name is selected. I'd like to be able to position the cursor within the method name, class name, or other symbol, and hit something like Cmd+Shift+L. Does anyone know of a solution, perhaps using a script, for the problem? Update: The keyboard shortcut works sometimes and sometimes not. When I position the text cursor on a method call with no parameters and press Cmd+Shift+L it takes me to the definition. But it doesn't work for a method that takes an (id) parameter. However it works if the parameter is an int. I have submitted a bug report to Apple.

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• Are fluid websites worth making anymore?

  - by Adam

  Hey guys, I'm making a website now and I am trying to decide if I should make it fluid or not. Fixed width websites are much easier to make and also much easier to make them appear consistent. To be honest though, I personally prefer looking at fluid websites that stretch to the full width of my monitor. My question comes from the fact that in most modern browsers you can hold control and scroll your mouse wheel to basically resize any website. So is creating a fluid website worth the trouble?

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• jQuery color plugin: onMouseOver animation causes flickering in FF3.5.5

  - by rt-uk

  I'm trying to change the background color of a div on mouseover and mouseout. Instant change to yellow on MouseOver, and slow fade on MouseOut. function hilightel(keydiv) { $('#'+keydiv).animate({ backgroundColor: '#ffffd3' },1); } function lolightel(keydiv) { $('#'+keydiv).animate({ backgroundColor: '#ffffff' },300); } < div onMouseOver=javascript:highlightel('item1'); onMouseOut=javascript:lolightel('item1'); id='item1'CONTENT< /div When the mouse moves over text within the div, though, it thinks I've moused-out and so flickers badly. Alternatives that don't work: - animateToClass doesn't support background-color so I'm using the 'color' plugin - I hear that switchClass doesn't work in Chrome - Can't use .hover because their will be dynamically named divs in the page so need a general function Thanks in advance...

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• C#: Problem trying to resolve a class when two namespaces are similar

  - by rally25rs

  I'm running into an issue where I can't make a reference to a class in a different namespace. I have 2 classes: namespace Foo { public class Class1 { ... } } namespace My.App.Foo { public class Class2 { public void SomeMethod() { var x = new Foo.Class1; // compile error! } } } The compile error is: The type or namespace name 'Class1' does not exist in the namespace 'My.App.Foo' In this situation, I can't seem to get Visual Studio to recognize that "Foo.Class1" refers to the first class. If I mouse-over "Foo", it shows that its trying to resolve that to "My.App.Foo.Class1" If I put the line: using Foo; at the top of the .cs file that contains Class2, then it also resolves that to "My.App.Foo". Is there some trick to referencing the right "Foo" namespace without just renaming the namespaces so they don't conflict? Both of these namespaces are in the same assembly.

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• Pass 2d array to function in C?

  - by Evelyn

  I know it's simple, but I can't seem to make this work. My function is like so: int GefMain(int array[][5]) { //do stuff return 1; } In my main: int GefMain(int array[][5]); int main(void) { int array[1800][5]; GefMain(array); return 0; } I referred to this helpful resource, but I am still getting the error "warning: passing argument 1 of GefMain from incompatible pointer type." What am I doing wrong?

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• got a question about Linked-List in java code.

  - by glacier89

  Linked-List: Mirror Consider the following private class for a node of a singly-linked list of integers: private class Node{ public int value; public Node next; } A wrapper-class, called, ListImpl, contains a pointer, called start to the first node of a linked list of Node. Write an instance-method for ListImpl with the signature: public void mirror(); That makes a reversed copy of the linked-list pointed to by start and appends that copy to the end of the list. So, for example the list: start 1 2 3 after a call to mirror, becomes: start 1 2 3 3 2 1 Note: in your answer you do not need to dene the rest of the class for ListImpl just the mirror method.

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• How to modify TList<record> value?

  - by Astronavigator

  How to modify TList < record value ? type TTest = record a,b,c:Integer end; var List:TList<TTest>; A:TTest; P:Pointer; .... .... List[10] := A; <- OK List[10].a:=1; <- Here compiler error : Left side cannot be assined to P:=@List[10]; <- Error: Variable requied

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• Are there any C++ tools that detect misuse of static_cast, dynamic_cast, and reinterpret_cast?

  - by chrisp451

  The answers to the following question describe the recommended usage of static_cast, dynamic_cast, and reinterpret_cast in C++: http://stackoverflow.com/questions/332030/when-should-static-cast-dynamic-cast-and-reinterpret-cast-be-used Do you know of any tools that can be used to detect misuse of these kinds of cast? Would a static analysis tool like PC-Lint or Coverity Static Analysis do this? The particular case that prompted this question was the inappropriate use of static_cast to downcast a pointer, which the compiler does not warn about. I'd like to detect this case using a tool, and not assume that developers will never make this mistake.

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• iSightAudio.plugin error when playing video using MediaPlayer

  - by Elisabeth

  I am working on creating a simple iPhone app that plays a movie via URL. When I Build&Run to test in the simulator, it works fine; as soon as I start playing the movie, I get the following message in the console: [1757:4b03] Cannot find executable for CFBundle/CFPlugIn 0x820ffe0 </Library/Audio/Plug-Ins/HAL/iSightAudio.plugin> (not loaded) [1757:4b03] Cannot find function pointer iSightAudioNewPlugIn for factory 9BE7661E-8AEF-11D7-8692-000A959F49B0 in CFBundle/CFPlugIn 0x820ffe0 </Library/Audio/Plug-Ins/HAL/iSightAudio.plugin> (not loaded) I don't get this error on other programs, so I assume it has something to do with this specific program, which uses the MediaPlayer.framework. Does anyone know what is causing this problem and how to fix it? Thank you

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• vector<string> or vector<char *>?

  - by Aaron

  Question: What is the difference between: vector<string> and vector<char *>? How would I pass a value of data type: string to a function, that specifically accepts: const char *? For instance: vector<string> args(argv, argv + argc); vector<string>::iterator i; void foo (const char *); //*i I understand using vector<char *>: I'll have to copy the data, as well as the pointer Edit: Thanks for input!

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• Determining a location's side of the road position with MapKit

  - by idStar

  Is there a way to use MapKit in iOS7 to not only get geocoding for an address, but determine what side of the road it is on? I'm not trying to build a full function navigation app, but similar to navigation apps that tell you things like "Your destination is in 100 feet on the right", I'd like to be able to obtain this information. Does MapKit give one a way to do this? Do I need to adopt routing privileges to access such, or is this just not available in the SDK period? If not available in the iOS7 SDK, knowing what options exist as services, would be a helpful pointer.

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• Is there any modern command-line based text editor?

  - by Pedro Morte Rolo

  A command line in a text editor is a wonderful feature. It allows the user to explore the editor's functionality and learn it's shortcuts in a textual way. It's much faster than using the mouse, and it is much easier to memorise "shortcuts" this way. Emacs and VI provide this, though, emacs and vi are not "modern". By "modern", I mean one that is original built to cope with the modern de-facto standards of selecting, copying, pasting, cutting, undoing, redoing and auto-completing. Cream/vi or EmacsCUE are not valid options, since there are loads of things built over them that conflict with the mentioned stuff. Is there any alternative?

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