Comments on: How do I assign mouse input to the proper window with multiple GLX windows?

Question: How do I assign mouse input to the proper window with multiple GLX windows?

Java_Man — Thu, 22 Mar 2007 21:19:20 -0800

How do I assign mouse input to the proper window with multiple GLX windows?

Hello,
I am programming an application that can render to several possible types of windows (GLUT, MFC, etc.) depending on platform. It is configured so that multiple windows can be displayed simultaneously.
I am having some trouble adding GLX window support under Linux. I can set up multiple windows and display different content on each: that works just fine. But if someone clicks on a window, I don't know how to assign the click to the proper window (though I can register its location in x, y coords). I'm having a hard time finding documentation (or a tutorial) that helps with this issue. Does anyone know where I can find some good information online?
For now, all of the windows are on the same display.
Also, it is important that this be done with GLX windows, so please do not suggest that I just use GLUT and be done with it.
Thank you.

By: paulsc

paulsc — Thu, 22 Mar 2007 23:06:08 -0800

You may need to implement a socket mechanism to ensure Java calls are sent to the GLX application's main processing thread, as sockets are one reliable way for inter-application processing to occur with GLX. See Listing 4 of this page for example code. Then, focus calls back to GLX via the messaging socket should do the trick.

By: Java_Man

Java_Man — Fri, 23 Mar 2007 05:05:19 -0800

I should have specified that--despite my handle--this is all being implemented in C++.

By: jepler

jepler — Fri, 23 Mar 2007 07:58:56 -0800

There's a field called 'window' in most X event structures, such as XButtonEvent and XMotionEvent. Use it.