Comments (2)
None of the example programs are X11 aware. Anything you do with the mouse will be seen and interpreted by the desktop, this includes giving focus to another window.
The easiest way to get back is to put your X11 terminal in the bottom-left corner of the screen before you run the program, that way if you do change the window focus it's very easy to re-position the cursor back within the terminal's window and left-click to regain focus even though you aren't able to see the desktop (just move the mouse left-down a lot and then slightly up-right).
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I am having the same problem when I ran any of the example programs such as the hello world program. If I don't touch the mouse the hello world program shows the full screen graphic and returns as it should when 'enter' is hit.
If I touch the mouse while the graphics window is open, then it loses focus. To not lose focus I have to start the example with the terminal window covering the entire screen.
Also If I run mouse-hellovg.c, the program runs as expected, but never closes with the right mouse click regardless of how I attempt to keep focus. For added debug I added gprints to the screen to prove the mouse clicks are being read correctly. A reboot is required after.
I am using a Rpi 3 with Raspbian Jessie and a typical HDMI monitor.
The terminal program I am launching from is the standard one "LXTerminal 0.2.0" which launches from the Raspbian Jessie
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