api, main: implement new keybindings

The following keybindings are now implemented:

- restart tracking. if not started, starts.
- toggle (keep position) while key held
- zero (keep zero) while key held

The latter two options only work for Windows as libqxt doesn't support
them.

Closes #291

1 files changed, 2 insertions, 1 deletions

diff --git a/gui/ui.h b/gui/ui.h
index 6dbcf962..9adb69a2 100644..100755
--- a/gui/ui.h
+++ b/gui/ui.h
@@ -111,7 +111,8 @@ signals:
     void emit_start_tracker();
     void emit_stop_tracker();
     void emit_toggle_tracker();
-    
+    void emit_restart_tracker();
+
     void emit_minimized(bool);
 public:
     MainWindow();