how to get input file name from the command line?

[mentalmushroom]

Hello. How can I get the file name passed to qt application from the command line? For example, I want to open some document when a user double clicks the file. If a file name contains spaces I receive it as separate words, therefore I can't distinguish "my file.txt" and "my file.txt" (many spaces).

[Santosh Reddy]

There no difference between how normal C/C++ main() takes arguments and how Qt Application main() takes. In fact in just the same.

Prompt>executable.exe "long file name with space.txt"

then
arg[0] = "executable.exe" (C String)
arg[1] = "long file name with space.txt" (C String)

[mentalmushroom]

yes, but when open the file via double click the file name is not automatically quoted.

[Santosh Reddy]

What are you double clicking, the executable file or some data file?

[mentalmushroom]

some data file, the same like you do when you open .doc file for example

[Santosh Reddy]

When you double click a file, it will be properly put in quotes and then supplied to the associated application (I am sure on windows it does)

What is the platform you are using?

[mentalmushroom]

Windows 7 x64. strange, i see it doesn't, because i receive argc = count of words, and each argv[i] is a word. The name is quoted if an application uses int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow), but qt uses main(int argc, char * argv[]) as the entry point

[Santosh Reddy]

Are you using Visual Stdio?

[mentalmushroom]

yes, I am using Visual Studio 2008 SP1 along with Qt 4.7.2

[high_flyer]

some data file, the same like you do when you open .doc file for example
This is something you configure in windows (or what every system you are on).
In windows, right click the data file -> properties -> open with.
There you select the application that should be fed this file as a parameter and be opened.
If you right click a *.doc file (or any other known to the system data file), you will see how it is done there.

[mentalmushroom]

This is something you configure in windows (or what every system you are on).
In windows, right click the data file -> properties -> open with.
There you select the application that should be fed this file as a parameter and be opened.
If you right click a *.doc file (or any other known to the system data file), you will see how it is done there.
What are you talking about? I was not asking how to implement opening files via double click, but how can I get a file name that contains spaces.

[high_flyer]

I was not asking how to implement opening files via double click, but how can I get a file name that contains spaces.
Posts 4,5 and 6 are talking about double clicking a data file that should be openned by some application:

What are you double clicking, the executable file or some data file?

some data file, the same like you do when you open .doc file for example

When you double click a file, it will be properly put in quotes and then supplied to the associated application (I am sure on windows it does)

[mentalmushroom]

He asked to understand what I want to do. Any ideas regarding getting file name?

[squidge]

If you ask Windows for quotes, it'll give you quotes. If you don't ask for them, you will not get them by default.

So, as suggested, copy an existing extension setup and it'll work.

http://img815.imageshack.us/img815/7066/capturerml.png

Note the quotes.

[mentalmushroom]

Ok, now I understand. Thank you.