highgui: refactor GTK backend

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- eliminate legacy C code, used fields
- fix mutex synchronization issues
- set trackbar min/max without unnecessary truncation; allow negative values

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This commit is contained in:

Alexander Alekhin

2017-08-14 19:33:00 +00:00

parent 19270103ec

commit 9e239c7a1e

2 changed files with 290 additions and 516 deletions

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modules/highgui/src/window_gtk.cpp

+281 -511

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