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Thread: Open multiple files with one program instance

  1. #1
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    Default Open multiple files with one program instance

    Hi, I want to select multiple files in Windows explorer and open them (by pressing Enter) with the same program instance.
    For now I can open one file this way, but if I select multiple files, I get the same number of instances of my program, and each of these instances opens one file.

    Is there a way to achieve the "all files - one instance" goal with Qt mechanisms, or do I have to use a native API?
    If the latter, any ideas for what I'd have to search? A short search brought "dde" up, is this right?

    Thanks in advance,

    Ginsengelf

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    Default Re: Open multiple files with one program instance

    maybe I didn't understand properly what you need, but did you see QFileDialog::getOpenFileNames method?
    Qt Assistant -- rocks!
    please, use tags [CODE] & [/CODE].

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    Default Re: Open multiple files with one program instance

    Have a look at QtSingeApplication and the article at the wiki (I think there was one...)
    Last edited by Lykurg; 16th March 2009 at 14:19. Reason: spelling error

  4. The following user says thank you to Lykurg for this useful post:

    Ginsengelf (16th March 2009)

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    Default Re: Open multiple files with one program instance

    I don't know the exact solution, but generally your problem splits in two sub problems:

    A) Only open ine instance of your program at a time

    B) give an open instance of you program an external command to open a certain file

    DDE sounds good, I used this with Latex some time ago...

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    Default Re: Open multiple files with one program instance

    Quote Originally Posted by Lykurg View Post
    Have a look at QtSingeApplication and the article at the wiki (I this there was one...)
    Amazing reaction time

    The QtSingleApplication looks like something I can use, thanks. In the wiki there's an just article about the Singleton pattern (or maybe I missed the correct one).

    Ginsengelf

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    Default Re: Open multiple files with one program instance

    Quote Originally Posted by Ginsengelf View Post
    (or maybe I missed the correct one).
    short answer: yes!

    Long answer: Look here: Data_Sharing and SingleApplication


    Lykurg

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    Default Re: Open multiple files with one program instance

    Indeed... it is listed under "Categories -> Tutorials" on the left, but I just looked over the wiki main page where it is not listed

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