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Adaptive drag threshold

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Changes the drag threshold from 14 to be based on window resolution. Scaling is performed so that a 1080p window has the original threshold of 14.
This commit is contained in:
zBugH1 2023-11-27 11:46:45 +11:00 • committed by Steve Cotton
parent 87ed0d0339
commit d81a15ed33
1 changed files with 6 additions and 2 deletions
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8
src/mouse_events.cpp
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@ -93,8 +93,12 @@ void mouse_handler::set_side(int side_number)
int mouse_handler::drag_threshold() const
{
// TODO: Use physical screen size.
return 14;
// Function uses window resolution as an estimate of users perception of distance
// Tune this variable if necessary:
const unsigned threshold_1080p = 14; // threshold number of pixels for 1080p
double screen_diagonal = std::hypot(gui2::settings::screen_width,gui2::settings::screen_height);
const double scale_factor = threshold_1080p / std::hypot(1080,1920);
return static_cast<int>(screen_diagonal * scale_factor);
}
void mouse_handler::touch_motion(int x, int y, const bool browse, bool update, map_location new_hex)