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  • Printing a JFrame and its components

    - by Alex Terreaux
    I have been working in a big program and one of its functionalities should be to print the contents of the main window. I checked the API and found this example: http://docs.oracle.com/javase/tutorial/2d/printing/gui.html it was very helpful, I tried to use that code in my program by placing this inside the actionperformed method of my print button: PrinterJob job = PrinterJob.getPrinterJob(); job.setPrintable(this); boolean ok = job.printDialog(); if (ok) { try { job.print(); } catch (PrinterException ex) { /* The job did not successfully complete */ } } If I click the print button, I get a printer dialog and when I tell it to print, it just prints a blank document. I know the above code is not all I need, as I've seen in the API's examples there is a print() method, but apparently they never call it, so it is pretty confusing. I've tried calling and using it many times, but with no success. Also, I think that when I finally get it to print, my window will need to be printed in the landscape orientation, it even may need some scaling. Any ideas on how to do that? I would like any useful help to help me implement this code successfully. I know I should be able to do it by myself just by checking the documentation (I've tried for almost 2 days now) but I can't get it to work. I've learned all the programming I know through the internet. Any help will be greatly appreciated.

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  • Doubt in switch case

    - by user302593
    Hi.. When i executes the following program it get the user input for account details and then print it correctly...But it cannot read the opt value(y/n)..it automatically calls again..i want to exit the program when i press n value... please help to solve this problem.. char opt; do { //Getting user input printf("\n Enter the Account Number:\n "); scanf("%d",&gAccNo_i); printf("\n Enter the Account Holder's Name:\n "); scanf("%s",gCustName_c); printf("\n Enter the Balance Amount:\n "); scanf("%f",&gBlncAmt_f); //Printing the inputted data. printf("\n Account Number : %d",gAccNo_i); printf("\n Customer Name : %s",gCustName_c); printf("\n Balance Amount : %f",gBlncAmt_f); printf("\n Do u want to wish to continue?(y/n)"); scanf("%c",&opt); }while(opt!='n');

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  • Using Joins vs Entity associations

    - by shivesh
    I am learning Entity framework and linq-to-entities. It's possible to get cross values from multiple tables using JOINS (join keyword) or using the navigation fields ( associations) in which case the framework knows how to reference the cross data. My question is what to use when?

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  • Does BeginReceive() get everything sent by BeginSend()?

    - by IVlad
    I'm writing a program that will have both a server side and a client side, and the client side will connect to a server hosted by the same program (but by another instance of it, and usually on another machine). So basically, I have control over both aspects of the protocol. I am using BeginReceive() and BeginSend() on both sides to send and receive data. My question is if these two statements are true: Using a call to BeginReceive() will give me the entire data that was sent by a single call to BeginSend() on the other end when the callback function is called. Using a call to BeginSend() will send the entire data I pass it to the other end, and it will all be received by a single call to BeginReceive() on the other end. The two are basically the same in fact. If the answer is no, which I'm guessing is the case based on what I've read about sockets, what is the best way to handle commands? I'm writing a game that will have commands such as PUT X Y. I was thinking of appending a special character (# for example) to the end of each command, and each time I receive data, I append it to a buffer, then parse it only after I encounter a #.

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  • Why string.Replace("X","Y") works only when assigned to new string?

    - by Petr
    Hi, I guess it has to do something with string being a reference type but I dont get why simply string.Replace("X","Y") does not work? Why I need to do `string A=stringB.Replace("X","Y") I thought it is just a method to be done on specified instance? Thanks for explanation EDIT: Thank you so far. I extend my question Why "b+="FFF"works but the b.replace is not?

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  • Why would gnu ld link order causes Signal 11 (SEGV) on startup?

    - by Benoit
    We are building a large application in C++ that includes the use of many (static) libraries. We have a problem where the application crashes on startup with a Signal 11, before we even reach main. After much debugging, we have observed that if we explicitly reference an object file so its link order is early, the program crashes on startup. If the file is referenced later (or not referenced at all), the program does not crash. To be clear, there is NO code invoked directly from this object file. However, as it is C++, there might be static objects that do get constructed (it's a CORBA IDL generated file). We use the -Wl,--start-group ... --end-group arguments to multi-pass link the symbols since the libraries are interdependent. Here is a representation of what I mean. This is what the linker's object file order is: Order 1 Order 2 Order 3 foo.o foo.o foo.o ... ... ... main.o main.o main.o crasher.o libA.o libA.o libA.o LibB.o LibB.o LibB.o LibC.o LibC.o LibC.o crasher.o Results: NO CRASH NO CRASH CRASH Does any one have an idea why the linkage order has an effect on the crash? It would be nice if we could force the crasher.o to link later, but we're really after an explanation. Also, is there a way to force the linker to place crasher.o towards the end? Just to add to the fun, in actuality, crasher.o is part of a Library in the --start/--end-group.

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  • Display different iphone views depending on logged in status

    - by user330936
    I want to display a login view to my users if they are not logged in and the main view if they are. In my header file I define a variable to hold the logged in status #define loggedIn 0 I figure I should then reference this in the initWithNibName method and then decide which nib to load. Is the right way of doing it? If so can someone help me out with the exact code? Thanks for any help

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  • generating thumbnail image for video

    - by George2
    Hello everyone, I am using VSTS 2008 + C# + .Net 3.5 on Windows 7. I want to use Expression Encoder 3 to generate thumbnail image for video (wmv format) every 30 seconds -- e.g. for a 5 minutes video, there will be 10 thumbnails which reflects video at the time of 0 second, 30 second, 1 minute, 1 minute and 30 seconds, etc. Any reference code? thanks in advance, George

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  • Google Drive listing, searching and deleting files

    - by omarshammas
    I'm building a web app that integrates with Google Drive, and am wondering if there was a way to list, search or delete files. I see from https://developers.google.com/drive/v1/reference/files#resource that there are 4 operations. If there are no list and search capabilities then the onus is on the app to handle the management. Is there another API I should be using? Are those features in the works?

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  • Trimming lists using a loop

    - by Vishal
    I have few lists like: a = [1, 2, 3, 4, 5] b = [4, 6, 5, 9, 2] c = [4, 7, 9, 1, 2] I want to trim all of them using a loop, instead of doing as below: a[-2:] b[-2:] c[-2:] I tried but got confused with pass by value or pass by reference fundamentals, looked into other questions as well but no help. Thanks

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  • best way to implement a deck for a card game in python

    - by matt1024
    What is the best way to store the cards and suits in python so that I can hold a reference to these values in another variable? For example, if I have a list called hand (cards in players hand), how could I hold values that could refer to the names of suits and values of specific cards, and how would these names and values of suits and cards be stored?

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  • Mef, passing parameters to a module

    - by Flex_Addicted
    Hi guys, I'm studying MEF and I'm not able to resolve a problem. I have a main application, called MainMEF, and a simple module, called SimpleModule. This one consists of a single UserControl which is loaded dinamically. When MainMEF starts up, I would be able to pass to the module a reference to main application contained into MainMEF. How could I fix this? Thanks in advance.

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  • What hash/map based programming language exist?

    - by Davorak
    Much like lisp is often considered a list based programming language what languages are considered map based? I remember reading about one a few years back, but can not longer find a reference to it. It looked something like: [if:test then:<code> else:<more code>] edit: and more where quoted code blocks which would be conditional evaluated. In this fashion if/cond and others would not be special form as they are in lisp/scheme.

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  • const object in c++

    - by Codenotguru
    I have a question on constant objects. In the following program: class const_check{ int a; public: const_check(int i); void print() const; void print2(); }; const_check::const_check(int i):a(i) {} void const_check::print() const { int a=19; cout<<"The value in a is:"<<a; } void const_check::print2() { int a=10; cout<<"The value in a is:"<<a; } int main(){ const_check b(5); const const_check c(6); b.print2(); c.print(); } void print() is constant member function of the class const_check, so according to the definition of constants if any attempt to change int a it should result in an error but the program works fine for me.I think i am having some confusion here, can anybody tell me why the compiler is not flagging it as an error??

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  • Referencing An Object From ThisWorkbook

    - by Soo
    I need to populate several comboboxes in an Excel sheet upon loading it. I have the Workbook_Open() event set up on my ThisWorkbook code sheet in my VBA Editor. Now that the code isn't in my Sheet1 code sheet in my VBA Editor, the following code doesn't work: ComboBox.AddItem "hulkSMAASH!" How can I reference this combobox from my ThisWorkbook code sheet in my VBA Editor?

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  • Recomendations for Creating a Picture Slide Show with Super-Smooth Transitions (For Live Presentaito

    - by Nick
    Hi everyone, I'm doing a theatrical performance, and I need a program that can read images from a folder and display them full screen on one of the computer's VGA outputs, in a predetermined order. All it needs to do is start with the first image, and when a key is pressed (space bar, right arrow), smoothly cross-fade to the next image. Sounds just like power-point right? The only reason why I can use power-point/open-office is because the "fade smoothly" transition isn't smooth enough, or configurable enough. It tends to be fast and choppy, where I would like to see a perfectly smooth fade over, say, 30 seconds. So the question is what is the best (cheap and fast) way to accomplish this? Is there a program that already does this well (for cheap or free)? OR should I try to hack at open-office's transition code? Or would it be easier to create this from scratch? Are there frameworks that might make it easier? I have web programming experience (php), but not desktop or real-time rendering. Any suggestions are appreciated!

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  • txt file read/overwrite/append. Is this feasible? (Visual C#)

    - by Arcadian
    Hi, I'm writing a program for some data entry I have to periodically do. I have begun testing a few things that the program will have to do but i'm not sure about this part. What i need this part to do is: read a .txt file of data take the first 12 characters from each line take the first 12 characters from each line of the data that has been entered in a multi-line text box compare the two lists line by line if one of the 12 character blocks from the multi-line text box match one of the blocks in the .txt file then overwrite that entire line (only 17 characters in total) if one of the 12 character blocks from the multi-line text box DO NOT match any of the blocks in the.txt file then append that entire line to the file thats all it has to do. i'll do an example: TXT FILE: G01:78:08:32 JG05 G08:80:93:10 JG02 G28:58:29:28 JG04 MULTI-LINE TEXT BOX: G01:78:08:32 JG06 G28:58:29:28 JG03 G32:10:18:14 JG01 G32:18:50:78 JG07 RESULTING TXT FILE: G01:78:08:32 JG06 G08:80:93:10 JG02 G28:58:29:28 JG03 G32:10:18:14 JG01 G32:18:50:78 JG07 as you can see lines 1 and 3 were overwriten, line 2 was left alone as it did not match any blocks in the text box, lines 4 and 5 were appended to the file. thats all i want it to do. How do i go about this? Thanks in advance

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