options/value: add `QObject::connect` wrapper

This is useful not just to save on complexity in call sites, but also
because I plan on using the Verdigris library to remove needless
`valueChanged()` and `setValue()` overloads from each `value<t>`
instance.

Also fix a bug in `options/tie.hpp` where `QComboBox::setCurrentIndex`
was erroneously called as `Qt::DirectConnection`.

1 files changed, 10 insertions, 6 deletions

diff --git a/tracker-pt/ftnoir_tracker_pt_dialog.cpp b/tracker-pt/ftnoir_tracker_pt_dialog.cpp
index 160eb831..988239e2 100644
--- a/tracker-pt/ftnoir_tracker_pt_dialog.cpp
+++ b/tracker-pt/ftnoir_tracker_pt_dialog.cpp
@@ -120,18 +120,22 @@ TrackerDialog_PT::TrackerDialog_PT(const QString& module_name) :
     tie_setting(s.enable_point_filter, ui.enable_point_filter);
     tie_setting(s.point_filter_coefficient, ui.point_filter_slider);
     tie_setting(s.point_filter_limit, ui.point_filter_limit_slider);
-    connect(&s.point_filter_coefficient, value_::value_changed<slider_value>(),
-            ui.point_filter_label, [this] { ui.point_filter_label->setValue(*s.point_filter_coefficient); } );
-    connect(&s.point_filter_limit, value_::value_changed<slider_value>(), ui.point_filter_limit_label,
-        [this] { ui.point_filter_limit_label->setValue(*s.point_filter_limit); }, Qt::QueuedConnection);
+    s.point_filter_coefficient.connect_to(ui.point_filter_label, [this](double x) {
+        ui.point_filter_label->setValue(x);
+    });
+
+    s.point_filter_limit.connect_to(ui.point_filter_limit_label, [this] {
+        ui.point_filter_limit_label->setValue(*s.point_filter_limit);
+    });
     ui.point_filter_label->setValue(*s.point_filter_coefficient);
     ui.point_filter_limit_label->setValue(*s.point_filter_limit);
 
     tie_setting(s.point_filter_deadzone, ui.point_filter_deadzone_slider);
     ui.point_filter_deadzone_label->setValue(*s.point_filter_deadzone);
 
-    connect(&s.point_filter_deadzone, value_::value_changed<slider_value>(), ui.point_filter_deadzone_label,
-        [this] { ui.point_filter_deadzone_label->setValue(*s.point_filter_deadzone); }, Qt::QueuedConnection);
+    s.point_filter_deadzone.connect_to(ui.point_filter_deadzone_label, [this](double x) {
+        ui.point_filter_deadzone_label->setValue(x);
+    });
 }
 
 QString TrackerDialog_PT::threshold_display_text(int threshold_value)