[gtk/matthiasc/lottie: 5/7] Be more lenient with clicks

[Matthias Clasen <matthiasc src gnome org>]

commit 8a9a067b4bd4dcbaa7a29eabcd65783ed6089bf8
Author: Matthias Clasen <mclasen redhat com>
Date:   Sat Nov 21 09:26:40 2020 -0500

    Be more lenient with clicks
    
    Allow clicks to be slightly outside the radius
    of the drawn circles, to make clicking easier.

 tests/curve-editor.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)
---
diff --git a/tests/curve-editor.c b/tests/curve-editor.c
index 8ba523e599..c06720b51c 100644
--- a/tests/curve-editor.c
+++ b/tests/curve-editor.c
@@ -58,7 +58,8 @@ opposite_point (const graphene_point_t *p,
   q->y = p->y + t * (a->y - p->y);
 }
 
-#define RADIUS 5
+#define DRAW_RADIUS 5
+#define CLICK_RADIUS 8
 
 typedef enum
 {
@@ -137,7 +138,7 @@ drag_begin (GtkGestureDrag *gesture,
   if (self->edit)
     for (i = 0; i < self->n_points; i++)
       {
-        if (graphene_point_distance (&self->points[i], &p, NULL, NULL) < RADIUS)
+        if (graphene_point_distance (&self->points[i], &p, NULL, NULL) < CLICK_RADIUS)
           {
             self->dragged = i;
             self->symmetric = (gtk_event_controller_get_current_event_state (GTK_EVENT_CONTROLLER (gesture)) 
& GDK_CONTROL_MASK) == 0;
@@ -461,7 +462,7 @@ pressed (GtkGestureClick *gesture,
       if (i % 3 != 0)
         continue;
 
-      if (graphene_point_distance (&self->points[i], &m, NULL, NULL) < RADIUS)
+      if (graphene_point_distance (&self->points[i], &m, NULL, NULL) < CLICK_RADIUS)
         {
           GAction *action;
 
@@ -497,7 +498,7 @@ released (GtkGestureClick *gesture,
 
   for (i = 0; i < self->n_points; i++)
     {
-      if (graphene_point_distance (&self->points[i], &m, NULL, NULL) < RADIUS)
+      if (graphene_point_distance (&self->points[i], &m, NULL, NULL) < CLICK_RADIUS)
         {
           if (i % 3 == 0)
             {
@@ -754,7 +755,7 @@ curve_editor_snapshot (GtkWidget   *widget,
                   g_assert_not_reached ();
                 }
 
-              gsk_path_builder_add_circle (builder, &self->points[i], RADIUS);
+              gsk_path_builder_add_circle (builder, &self->points[i], DRAW_RADIUS);
             }
 
           path = gsk_path_builder_free_to_path (builder);