Fixes #222 - left click on a button leaves "Left"

button with "suggested-action" style

The reason that happens is that when clicking on a
button, the button claims the "released" gesture
and we don't get the "released" signal.
Setting the propagation fhase to "CAPTURE" allows
us to handle the event before the button claims
it.

Author: UrtsiSantsi

src/Event Controllers/main.js

@@ -44,6 +44,7 @@ ctrl_button.connect("clicked", () => {
 
 // Detect pointer button press and release events
 const gesture_click = new Gtk.GestureClick({ button: 0 });
+gesture_click.propagation_phase = Gtk.PropagationPhase.CAPTURE;
 
 window.add_controller(gesture_click);
 

src/Event Controllers/main.py

@@ -84,6 +84,7 @@ def on_swipe(_self, vel_x, _vel_y):
 
 # Detect pointer button press and release events
 gesture_click = Gtk.GestureClick(button=0)
+gesture_click.set_propagation_phase(Gtk.PropagationPhase.CAPTURE)
 window.add_controller(gesture_click)
 gesture_click.connect("pressed", on_pressed)
 gesture_click.connect("released", on_released)

src/Event Controllers/main.vala

@@ -47,6 +47,7 @@ public void main () {
     var gesture_click = new Gtk.GestureClick () {
         button = 0
     };
+    gesture_click.propagation_phase = Gtk.PropagationPhase.CAPTURE;
     ((Gtk.Widget) window).add_controller (gesture_click);
 
     gesture_click.pressed.connect ((gesture, n_press, x, y) => {