C / C++ / MFC

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Multiple selection in Tree control(Non MFC) Ram Shelke17-Sep-12 20:10 Ram Shelke 17-Sep-12 20:10  Hi, can anyone please tell me how to select the multiple items in the tree control using Non MFC code i searched on google i got the following but it is used with MFC i want it in Win32, if anyone have idea about this please reply http://www.codeguru.com/cpp/controls/treeview/misc-advanced/article.php/c629/A-multiselect-tree-control-class.htm thanks Re: Multiple selection in Tree control(Non MFC) Richard MacCutchan17-Sep-12 22:35 Richard MacCutchan 17-Sep-12 22:35  According to the documentation[^] mult-select is not supported. You would probably need to use subclassing[^] to achieve this. One of these days I'm going to think of a really clever signature. Re: Multiple selection in Tree control(Non MFC) Ram Shelke17-Sep-12 23:01 Ram Shelke 17-Sep-12 23:01  but i am using win32, how to do this? is do u have an idea. Re: Multiple selection in Tree control(Non MFC) Richard MacCutchan17-Sep-12 23:12 Richard MacCutchan 17-Sep-12 23:12  Ram Shelke wrote: do u have an idea. Yes, and I gave it to you in my previous answer. You need to subclass the control and add your own code to make multi-select work. One of these days I'm going to think of a really clever signature. Re: Multiple selection in Tree control(Non MFC) Chris Meech18-Sep-12 3:59 Chris Meech 18-Sep-12 3:59  As Richard has pointed out, there is no support for multi selection for a tree control, so it is something that has to be added on your own. However from his link to the documentation, there is another link to an article that suggest with Windows Vista and onward, there is support for multi selection on a tree control. Check out this link and see if it helps you to get started. Windows Vista Control Enhancements[^] Chris Meech I am Canadian. [heard in a local bar] In theory there is no difference between theory and practice. In practice there is. [Yogi Berra] posting about Crystal Reports here is like discussing gay marriage on a catholic church’s website.[Nishant Sivakumar] Re: Multiple selection in Tree control(Non MFC) Richard MacCutchan18-Sep-12 4:10 Richard MacCutchan 18-Sep-12 4:10  Interesting that the article was written in 2007, and yet the link I found claims to be current as of 2012. One of these days I'm going to think of a really clever signature. Re: Multiple selection in Tree control(Non MFC) Chris Meech18-Sep-12 4:15 Chris Meech 18-Sep-12 4:15  That documentation was rated down and that might be part of the reason. Though there is no mention if the Vista control enhancements ever made it back into the main stream, like Win 7 or 8. Chris Meech I am Canadian. [heard in a local bar] In theory there is no difference between theory and practice. In practice there is. [Yogi Berra] posting about Crystal Reports here is like discussing gay marriage on a catholic church’s website.[Nishant Sivakumar] Single system instance Taria16-Sep-12 23:16 Taria 16-Sep-12 23:16  Hi I have tried to use a method from long ago: http://beta.codeproject.com/Articles/358/Avoiding-Multiple-Instances-of-an-Application BOOL CMyApp::InitApplication() { // there can be only one instance of this application, that is per windows user logon session!...? if(::CreateMutex(NULL,FALSE,_T("{9C114FA0-0D7A-4e3f-8195-BE59EFC3EA42}"))==NULL) return FALSE; if(::GetLastError()==ERROR_ALREADY_EXISTS || ::GetLastError()==ERROR_ACCESS_DENIED) return FALSE; return CWinApp::InitApplication(); } Simultaneous users can still create an instance each. Why is that? Do anyone have an (easy) solution? Using Windows XP SP3 with VC 6.0. Thanks!...? Re: Single system instance Jochen Arndt16-Sep-12 23:35 Jochen Arndt 16-Sep-12 23:35  With Windows 2000 and later, you should prefix the name with 'Global\' to create it in the global name space: ::CreateMutex(NULL,FALSE,_T("Global\\{9C114FA0-0D7A-4e3f-8195-BE59EFC3EA42}") Then the call will also fail for other users. Re: Single system instance Michael Haephrati18-Sep-12 10:48 Michael Haephrati 18-Sep-12 10:48  You need an additional part which will solve it. Your application should check if other instances if it are running (by checking all running processes) and if so, terminate itself. You can set up rules as of who should quit and who should continue (for example, if an outdated version is running and another newer version starts, then the older version should quit, like in my article about auto update Target Eye Revealed part 1 - Target Eye's Unique AutoUpdate Mechanism[^]). How to recognize a table in a pdf file LuigiSc216-Sep-12 4:10 LuigiSc2 16-Sep-12 4:10  Hi all, is there a way, in C++, to correctly recognize a table in a pdf file and extract its data laid out in rows and columns? I think a possible solution could be extract tables from pdf to excel (using one of the tools available) and then reading data from excel files. But is this the proper way ? Are there any other solutions ? Is there a library (free or commercial) that can help me ? Thanks in advance for your help Luigi Re: How to recognize a table in a pdf file Mohibur Rashid16-Sep-12 4:40 Mohibur Rashid 16-Sep-12 4:40  As a matter of fact there is no PDF way to determine a table in a pdf. because there is no table type object in PDF file. But with clever programming you can determine if there is any table. but yet that wont be simple task and might not be correct all the time. I wish I could believe there is an after life. Hint for the network check to be done in c++ en41115-Sep-12 2:39 en411 15-Sep-12 2:39  I am trying do a coding in c++ and My problem goes something like this. I have a variable of 5 arrays a[5] for storing the 5nodes of a network. The network is randomly formed by the random number generator. I have the time of travel for each paths of the network. All the nodes may not be connected to eachother. The network and the time of travel of each path is as per the user has assigned. Now I have to check the elements of each array and assign the penalty as per the conditions. My main task is to find a network path traveling each node of the network only once such that the node visited is not repeated. Its similar to TSP but the difference is that in TSP has the condition that it is possible to travel from each node to every other node. But for my case the network is pre defined and nodes are not connected to every other nodes in the network. a) Like if the network stored is 2-2-3-4-5 then I find that a[1]=a[2] so I will have to assign the penalty (type 1 )as the network has a path 2-2 which is not possible as the starting and end of the path is same. At the same time for rest of the paths from node 2 to 3, node 3 to 4, node 4 to 5 I will have to calculate the sum of total time of travel when I finally reach the node 5. b) Also there is another penalty condition if the path is not a possible path in the network given by user then I will have to assign penaly( type 2) for such kind of condition like if 1-2-4-3-5 is a network to be checked. Here I am supposing that all the paths are possible but the path 4-3 doesn’t exist in the real network provided by the user, So for such cases I will have to calculate the sum of the time of travel for the paths which are possible and also assign the penalty (type 2) c) There is also a condition that I need the end point of the network as node 5.So in the network generated randomly if the end node is not the node 5 then I will have to assign the penalty (type 3) and at the same time calculated the sum of the rest possible paths. For example the node 3-5-2-1-4 here the end node is 4 so I will have to assign the penalty(type 4) d) Since I am not allowed to visit the same node twice I will have to assign the (penalty type 4) if the network has repeatition of nodes like if the network is 2-4-3-1-4. Here the node 4 is occurring twice so I will have to assign the penalty(type 4) and also calculate the sum of the time of travel of the other paths. Considering all the above penalty conditions I will have to check the network s. I am really not being able to use any logic on how do I start. Need some hint on how do I do it. modified 15-Sep-12 12:53pm. Re: Hint for the network chek Richard MacCutchan15-Sep-12 3:16 Richard MacCutchan 15-Sep-12 3:16  This question may get a better response if posted in the Algorithms Forum[^], as it is not really specific to C/C++. One of these days I'm going to think of a really clever signature. How can i create a numeric constant from a numeric variable ? s.n.arruda15-Sep-12 0:57 s.n.arruda 15-Sep-12 0:57  Hi, I need to create an array using a int variable who cant be a numeric const, because it represent a variable length of something. So i need to use the code: const int iLength = iVariable; int x[iLength]; this code doesn´t work because the c++ allows me just: (suppouse length 10) #define 10 or int x[10]; I do not to use resize array because would be slower someone can help me ? Thanks for your attention Re: How can i create a numeric constant from a numeric variable ? pasztorpisti15-Sep-12 1:08 pasztorpisti 15-Sep-12 1:08  A C array has always fixed length so its length must be a compile time constant. If you want a dynamic array then use stl, more specifically std::vector to do the job. Thats a resizable array. std::vector documentation here Re: How can i create a numeric constant from a numeric variable ? Richard MacCutchan15-Sep-12 2:31 Richard MacCutchan 15-Sep-12 2:31  C++ int* px = new int[iVariable]; One of these days I'm going to think of a really clever signature. Conversion of image Handle hDib to Char* array in C++ AhmdAxf14-Sep-12 2:08 AhmdAxf 14-Sep-12 2:08  Hi All, I have a an image handle provided to me by a device in form of C++ Handle hDib; It is not C++ HDC hDC; I want to convert this hDIB to Char* array for further use in my application. Please let me know if any of you know about a good c++ library for this. Thanks in advance. Re: Conversion of image Handle hDib to Char* array in C++ CPallini14-Sep-12 2:25 CPallini 14-Sep-12 2:25  Could GetDIBits[^] function help you? Veni, vidi, vici. Re: Conversion of image Handle hDib to Char* array in C++ AhmdAxf14-Sep-12 2:46 AhmdAxf 14-Sep-12 2:46  Dear As I mentioned in my question that it is not HDC rather it is C++ HANDLE hDib; The function you mentioned need HDC as a parameter which i donot have Re: Conversion of image Handle hDib to Char* array in C++ CPallini14-Sep-12 2:58 CPallini 14-Sep-12 2:58  What kind of device are you dealing with? Veni, vidi, vici. Re: Conversion of image Handle hDib to Char* array in C++ AhmdAxf14-Sep-12 3:13 AhmdAxf 14-Sep-12 3:13  It is a digital camera Re: Conversion of image Handle hDib to Char* array in C++ CPallini14-Sep-12 3:16 CPallini 14-Sep-12 3:16  How can a digital camera provide a HANDLE to a DIB? Veni, vidi, vici. Re: Conversion of image Handle hDib to Char* array in C++ AhmdAxf14-Sep-12 3:23 AhmdAxf 14-Sep-12 3:23  It is a method provided in its SDK which I'm using It also saves it on the disk but I want to convert it into Char* array and later to jbyteArray. Well the question is Is it possible to convert this Handle (which is obviously a pointer to that specific DIB) to char* array modified 14-Sep-12 9:31am. Re: Conversion of image Handle hDib to Char* array in C++ Chris Losinger14-Sep-12 5:56 Chris Losinger 14-Sep-12 5:56  if that handle is really a pointer to a DIB, then it's a pointer to an BITMAPINFOHEADER, with the pixel bytes immediately following. image processing toolkits | batch image processing

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