I have created a control and the mosemove for that control makes it change color, but I want to change it back to default when my mouse moves out of that control. I would have thought WM_MOUSELEAVE would do it but it didn't. Thanks ...
what is the best way to create a gradient for a 2D polygon in OpenGL, (Linear, and Radial)? Thanks How can you generate textures for radial gradients on the fly? ...
Do Windows Native API support Timers? I am aware that POSIX implementations on Windows support timer, but I am interested in Windows SDK APIs. ...
I am trying to provide an AT/Modem-like interface around some hardware. Follwing this post I have the server setting up a pty using openpty(). Now I can communicate with the server as expected with a client app that open the slave and communicates via read() and write() calls. However I would also like to be able to use either the scre...
Hi, in Java I think it is possible to cruise through jar files like they were not compressed. Is there some similar (and portable) thing in C/C++ ? I would like to import binary data into memory from a large (zipped or similar) file without decompressing to disk first and afterwards writing to disk in a compressed way. Maybe some tr...
Quick and easy C question: char* foo How can I test if foo hasn't still been assigned a value? Thanks. ...
Hi everybody, I am little new to MAC os but while building an cpp application on MAC OS X , using g++ I am getting strange error from linker. first at one step I am creating a library using several object files generated from cpp source and then I am creating a single archive using ar rvs command. If I am linking this library to anot...
I am just starting out with win32 GDI programming and finding good references hard to come by. I have a simple application that captures the screen by doing the following: UINT32 x,y; x = GetSystemMetrics(SM_CXSCREEN); y = GetSystemMetrics(SM_CYSCREEN); HDC hdc = GetDC(NULL); HDC hdcScreen = CreateCompatibleDC(hdc); HBITMAP hbmp = C...
Hi, I'm starting with PHP for dynamic web pages. I have some libaries written in ANSI C for getting/setting parameters and other proprietary stuff. I wonder, is there a simple solution to use a wrapper inside PHP to call this funtions? Is there a already existing class/library? What would be the best practice to do this on my own? I don...
I'm having some trouble stepping over in GDB. I've built an example program from the ffmpeg library with debug symbols on and stripping off. Although I configured the ffmpeg library to static and explicitly disabled shared, it looks like the program I'm debugging is linking dynamically, since its file size is only 99kB. I don't know t...
INT GetTree (HWND hWnd, HTREEITEM hItem, HKEY *pRoot, TCHAR *pszKey, INT nMax) { TV_ITEM tvi; TCHAR szName[256]; HTREEITEM hParent; HWND hwndTV = GetDlgItem (hWnd, ID_TREEV); memset (&tvi, 0, sizeof (tvi)); hParent = TreeView_GetParent (hwndTV, hItem); if (hParent) { // Get the parent ...
Hi guys, need your help. I actually don't know how to extract dates from a arff-file. arff-file: @ATTRIBUTE a1 NUMERIC @ATTRIBUTE a2 NUMERIC @ATTRIBUTE a3 {a,b,c,d,e} @DATA 12.5,1,b 3.7,2,a 3.5,1,c ... do C have BufferedReader and InputStreams? Thanks a lot! ...
See, I have two functions, one to get a char, and other to put a char like this. void function_get_char (input); void function_put_char (output); I have a function pointer to these functions like this. void (*function_operators[])(input_or_output) = {function_get_char, function_put_char}; I need of, when I'll call my function_opera...
in these i'm playing with thread library and trying to implement some functions. One of the tutorial says that to run the program use : gcc -lpthread -lrt -lc -lm project1.c scheduler.c -o out first of all i need deep understanding of what is gcc doing in each line, lpthread is used for what? what are the contributions of lrt -lc -l...
program runs fine. When I put a breakpoint a segmentation fault is generated. Is it me or GDB? At run time this never happens and if I instantiate only one object then no problems. Im using QtCreator on ubuntu x86_64 karmic koala. UPDATE1: I have made a small program containing a simplified version of that class. You can download ...
Hello, I have the coordinates (x,y) of 2 points. I want to build the third point so that these 3 points make an equilateral triangle. How can I calculate the third point? Thank you ...
I have called getpeername on my connected socket and now have an IPv6 address of the connected peer. How do I tell whether my peer's IP address is localhost? Edit: To clarify, I mean specifically localhost, as in the loopback IP address. ...
I'm working some code including communication between processes, using semaphores. I made structure like this: typedef struct container { sem_t resource, mutex; int counter; } container; and use in that way (in main app and the same in subordinate processes) container *memory; shm_unlink("MYSHM"); //just in case fd = shm_ope...
Hi, I have a few questions about the socket library in C. Here is a snippet of code I'll refer to in my questions. char recv_buffer[3000]; recv(socket, recv_buffer, 3000, 0); First, How do I decide how big to make recv_buffer? I'm using 3000, but it's arbitrary. Second, what happens if recv() receives a packet bigger than my recv_...
I've got a pack box in my GTK application and I'm replacing it every once in a while with a completely new entry (at least for now cause I'm in a hurry). Since I'm replacing it with a new instance, do I need to explicitly free from memory the old pack box contents or is there some garbage collection in GTK? If I do need to explicitly n...