On Friday, 26 April 2019 at 14:50:17 UTC, Mike Wey wrote:
On 26-04-2019 10:31, Amex wrote:
When debugging under visual D, the keyboard response is slowed
down to the extreme. This is a Gtk issue I believe. It only
has to do with the keyboard.
For example, if I hit F10 to step, it takes the ide about 10
seconds to "respond" and move to the next line... yet the
mouse can access stuff instantaneous.
I believe Gtk or GtkD is slowing down the keyboard input
somehow and for some reason making debugging apps a nightmare
since it literally takes about 100 times longer to debug than
it should.
searching google reveals:
https://github.com/Microsoft/vcpkg/issues/4529
https://developercommunity.visualstudio.com/content/problem/42018/debugging-with-keyboard-very-slow.html
"You somehow break keyboard shortcuts during debugging in VS
if the application you're debugging is registering a callback
with "SetWindowsHookEx" from user32.dll with hook ID
"WH_KEYBOARD_LL".
Don't call it in debug builds or add "if
(!Debugger.IsAttached)" in front of the call to
"SetWindowsHookEx" if the debugger is attached before the
function is called.
This brings debugging with keyboard back to the same speed as
with the UI buttons for our application."
This seems to be an issue with Gtk. I'm not sure if GtkD can
do anything about it. Maybe somehow reroute the keyboard
handler(first remove it from the hook then call it manually or
reduce the number of calls to it).
I can confirm that gtk call "SetWindowsHookEx" with the
"WH_KEYBOARD_LL" ID upon initialization.
As far as i can tell it doesn't provide a way to skip this.
Could you unhook it and manually call it or simply disable it
when the app is being debugged? essentially just wrap it with a
new hook that selectively calls it.
NewHook()
{
if (notdebugbreak) OldHook
}
Keyboard input doesn't need to happen to the app while in one is
in the debugger so the hook doesn't need to be called.
This requires two things:
1. To be able to get the hook of the function and remove it.
(this might be hard)
2. Know when in debug mode. This should be somewhat easy since
I'm sure Visual Studio sets some flag when broke in to a program.
Alternatively one could add a function that forces disabling
where one could call it in code that they are debugging(which
hopefully doesn't require keyboard input). I rarely am debugging
keyboard stuff so I'd just call it at the start of the program
and benefit from it... and if I have to do keyboard stuff I'll
enable it and suffer... but at least I'll have some control over
the problem.
