QClipBoard: how to determine if data was copied (Ctrl+C) or cut to the clipboard in another application?

Violet Giraffe

My application is clipboard-enabled and is able to accept mime data (not just plain text). Is it possible to know whether the data was put to clipboard by another application with Ctrl+X or Ctrl+C?

Dave007

On wich platform should ur application run?

Violet Giraffe

Windows / OSX / Linux, but Windows is primary.

Dave007

I know under Windows u can try to poll the State of the two keys with the GetAsyncKeyState Function:
http://msdn.microsoft.com/en-us/library/windows/desktop/ms646293(v=vs.85).aspx

But I don't know how to solve that on the other platforms.

Violet Giraffe

That's hardly a solution because pressing Ctrl+C or Ctrl+X in another app doesn't trigger any event in my program. Paste is the event I need to handle properly.

Dave007

I think a better way of solving the Problem is to react on the dataChange Signal wich is emitted when the data in the clipboard were changed:

http://qt-project.org/doc/qt-4.8/qclipboard.html#dataChanged

Dave007

So only that I know what u want to do:

Should your application react when something is put into the clipboard?
Or when something is pasted into another application with Ctrl+V?

Violet Giraffe

The data (file URLs) is copied in another application and pasted into mine. At which point I need to know whether I must delete the original files or not.

Dave007

If u paste it into a QTextEdit or QLineEdit u can react on the textChanged Signal.
I think getting the Ctrl+V press Event is harder to react on different platforms.