Make editor inspector easing lines use the accent color when dragged

This makes their visual feedback more consistent with other controls.

This also makes easing lines slightly more subtle by decreasing
their opacity by 10%.

editor/editor_properties.cpp

@@ -922,16 +922,29 @@ EditorPropertyFloat::EditorPropertyFloat() {
 
 void EditorPropertyEasing::_drag_easing(const Ref<InputEvent> &p_ev) {
 
-	Ref<InputEventMouseButton> mb = p_ev;
-	if (mb.is_valid() && mb->is_pressed() && mb->get_button_index() == BUTTON_RIGHT) {
-		preset->set_global_position(easing_draw->get_global_transform().xform(mb->get_position()));
-		preset->popup();
-	}
-	if (mb.is_valid() && mb->is_doubleclick() && mb->get_button_index() == BUTTON_LEFT) {
-		_setup_spin();
+	const Ref<InputEventMouseButton> mb = p_ev;
+	if (mb.is_valid()) {
+		if (mb->is_doubleclick() && mb->get_button_index() == BUTTON_LEFT) {
+			_setup_spin();
+		}
+
+		if (mb->is_pressed() && mb->get_button_index() == BUTTON_RIGHT) {
+			preset->set_global_position(easing_draw->get_global_transform().xform(mb->get_position()));
+			preset->popup();
+
+			// Ensure the easing doesn't appear as being dragged
+			dragging = false;
+			easing_draw->update();
+		}
+
+		if (mb->get_button_index() == BUTTON_LEFT) {
+			dragging = mb->is_pressed();
+			// Update to display the correct dragging color
+			easing_draw->update();
+		}
 	}
 
-	Ref<InputEventMouseMotion> mm = p_ev;
+	const Ref<InputEventMouseMotion> mm = p_ev;
 
 	if (mm.is_valid() && mm->get_button_mask() & BUTTON_MASK_LEFT) {
 
@@ -969,13 +982,19 @@ void EditorPropertyEasing::_draw_easing() {
 	Rect2 r(Point2(), s);
 	r = r.grow(3);
 
-	int points = 48;
+	const int points = 48;
 
 	float prev = 1.0;
-	float exp = get_edited_object()->get(get_edited_property());
+	const float exp = get_edited_object()->get(get_edited_property());
 
-	Ref<Font> f = get_font("font", "Label");
-	Color color = get_color("font_color", "Label");
+	const Ref<Font> f = get_font("font", "Label");
+	const Color font_color = get_color("font_color", "Label");
+	Color line_color;
+	if (dragging) {
+		line_color = get_color("accent_color", "Editor");
+	} else {
+		line_color = get_color("font_color", "Label") * Color(1, 1, 1, 0.9);
+	}
 
 	Vector<Point2> lines;
 	for (int i = 1; i <= points; i++) {
@@ -983,7 +1002,7 @@ void EditorPropertyEasing::_draw_easing() {
 		float ifl = i / float(points);
 		float iflp = (i - 1) / float(points);
 
-		float h = 1.0 - Math::ease(ifl, exp);
+		const float h = 1.0 - Math::ease(ifl, exp);
 
 		if (flip) {
 			ifl = 1.0 - ifl;
@@ -995,8 +1014,8 @@ void EditorPropertyEasing::_draw_easing() {
 		prev = h;
 	}
 
-	easing_draw->draw_multiline(lines, color, 1.0, true);
-	f->draw(ci, Point2(10, 10 + f->get_ascent()), String::num(exp, 2), color);
+	easing_draw->draw_multiline(lines, line_color, 1.0, true);
+	f->draw(ci, Point2(10, 10 + f->get_ascent()), String::num(exp, 2), font_color);
 }
 
 void EditorPropertyEasing::update_property() {
@@ -1033,6 +1052,9 @@ void EditorPropertyEasing::_spin_value_changed(double p_value) {
 
 void EditorPropertyEasing::_spin_focus_exited() {
 	spin->hide();
+	// Ensure the easing doesn't appear as being dragged
+	dragging = false;
+	easing_draw->update();
 }
 
 void EditorPropertyEasing::setup(bool p_full, bool p_flip) {
@@ -1095,6 +1117,7 @@ EditorPropertyEasing::EditorPropertyEasing() {
 	spin->hide();
 	add_child(spin);
 
+	dragging = false;
 	flip = false;
 	full = false;
 }

editor/editor_properties.h

@@ -311,6 +311,7 @@ class EditorPropertyEasing : public EditorProperty {
 	EditorSpinSlider *spin;
 	bool setting;
 
+	bool dragging;
 	bool full;
 	bool flip;