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On Qt Creator, is there a way separate projects can be made to open in separate windows?

The visual separation of the source code files would make comparison / copying much easier.

EDIT: From sjwarner's answer it seems it's possible to open projects in separate windows under Linux and Windows. However, I am using Mac OS X

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  • Did you try right-clicking on your .pro file and open with qt-creator? Commented May 23, 2012 at 8:08
  • @spyke Right click & open does not work either Commented May 23, 2012 at 13:32

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Looking at open's man page,

-n  Open a new instance of the application(s) even if one is already running.

I figured we can use it like this

open -n /path/to/Qt\ Creator.app

to open and work on multiple Qt Creator projects in parallel.

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The visual separation of the source code files would make comparison / copying much easier.

If you can't open multiple windows, you split the code window to show multiple documents side-by-side (the option is in the Window menu). How effective this is for you depends on your screen size/resolution of course.

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This is what I am doing currently but it is painful because there are files of the same name in both projects and it makes it confusing at times to figure which project a particular source file belongs to.
I can't see having multiple windows helping then, as Qt Creator only displays the filename in the titlebar/document viewer. The only difference would be the project tree.
Keeping similarly named files from different projects in separate windows would be less confusing than keeping them side by side in split view at least to me - because often the files gets swapped with another one while debugging and bringing it back in its split-view requires the project tree which can be pretty long. Not convenient at all IMO
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I just open Qt Creator twice and then go from there...! You might find it easier to manage multiple projects using the session system though (File->Session Manager)...

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How do you open two instances? When I am double clicking the Qt Creator application, it just brings the already opened instance to focus. Can't find any setting under Preferences to change the behavior either. I am on a Mac.
Ah, can't help you there I'm afraid - I can open multiple instances of Qt Creator on both Win and Linux but I don't use mac - sorry! I'd recommend adding that info to the question :)
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I created Parall, a macOS utility that lets you run multiple independent instances of any app, including Qt Creator.

Each shortcut bundle made with Parall launches the target app in its own isolated environment - separate HOME directory, environment variables, and settings. That means you can open several Qt Creator instances at the same time, each with different projects, plugins, or configurations, and they won't interfere with each other.

enter image description here

It requires no Terminal commands or duplicated app folders - just create the shortcut and launch.

The app is available in the Mac App Store and approved by Apple.

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