Add theme colors to touch dragger and fix touch dragger icon theme

doc/classes/SplitContainer.xml

@@ -94,6 +94,15 @@
 		</constant>
 	</constants>
 	<theme_items>
+		<theme_item name="touch_dragger_color" data_type="color" type="Color" default="Color(1, 1, 1, 0.3)">
+			The color of the touch dragger.
+		</theme_item>
+		<theme_item name="touch_dragger_hover_color" data_type="color" type="Color" default="Color(1, 1, 1, 0.6)">
+			The color of the touch dragger when hovered.
+		</theme_item>
+		<theme_item name="touch_dragger_pressed_color" data_type="color" type="Color" default="Color(1, 1, 1, 1)">
+			The color of the touch dragger when pressed.
+		</theme_item>
 		<theme_item name="autohide" data_type="constant" type="int" default="1">
 			Boolean value. If [code]1[/code] ([code]true[/code]), the grabber will hide automatically when it isn't under the cursor. If [code]0[/code] ([code]false[/code]), it's always visible. The [member dragger_visibility] must be [constant DRAGGER_VISIBLE].
 		</theme_item>

scene/gui/split_container.cpp

@@ -376,6 +376,10 @@ void SplitContainer::_notification(int p_what) {
 		} break;
 		case NOTIFICATION_THEME_CHANGED: {
 			update_minimum_size();
+			if (touch_dragger) {
+				touch_dragger->set_modulate(theme_cache.touch_dragger_color);
+				touch_dragger->set_texture(_get_touch_dragger_icon());
+			}
 		} break;
 	}
 }
@@ -542,7 +546,7 @@ void SplitContainer::set_touch_dragger_enabled(bool p_enabled) {
 		touch_dragger->set_texture(_get_touch_dragger_icon());
 		touch_dragger->set_anchors_and_offsets_preset(Control::PRESET_CENTER);
 		touch_dragger->set_default_cursor_shape(vertical ? CURSOR_VSPLIT : CURSOR_HSPLIT);
-		touch_dragger->set_modulate(Color(1, 1, 1, 0.3));
+		touch_dragger->set_modulate(theme_cache.touch_dragger_color);
 		touch_dragger->connect(SceneStringName(gui_input), callable_mp(this, &SplitContainer::_touch_dragger_gui_input));
 		touch_dragger->connect(SceneStringName(mouse_exited), callable_mp(this, &SplitContainer::_touch_dragger_mouse_exited));
 		dragging_area_control->add_child(touch_dragger, false, Node::INTERNAL_MODE_FRONT);
@@ -561,7 +565,7 @@ bool SplitContainer::is_touch_dragger_enabled() const {
 
 void SplitContainer::_touch_dragger_mouse_exited() {
 	if (!dragging_area_control->dragging) {
-		touch_dragger->set_modulate(Color(1, 1, 1, 0.3));
+		touch_dragger->set_modulate(theme_cache.touch_dragger_color);
 	}
 }
 
@@ -571,17 +575,16 @@ void SplitContainer::_touch_dragger_gui_input(const Ref<InputEvent> &p_event) {
 	}
 	Ref<InputEventMouseMotion> mm = p_event;
 	Ref<InputEventMouseButton> mb = p_event;
-
 	if (mb.is_valid() && mb->get_button_index() == MouseButton::LEFT) {
 		if (mb->is_pressed()) {
-			touch_dragger->set_modulate(Color(1, 1, 1, 1));
+			touch_dragger->set_modulate(theme_cache.touch_dragger_pressed_color);
 		} else {
-			touch_dragger->set_modulate(Color(1, 1, 1, 0.3));
+			touch_dragger->set_modulate(theme_cache.touch_dragger_color);
 		}
 	}
 
 	if (mm.is_valid() && !dragging_area_control->dragging) {
-		touch_dragger->set_modulate(Color(1, 1, 1, 0.6));
+		touch_dragger->set_modulate(theme_cache.touch_dragger_hover_color);
 	}
 }
 
@@ -640,6 +643,9 @@ void SplitContainer::_bind_methods() {
 	BIND_ENUM_CONSTANT(DRAGGER_HIDDEN);
 	BIND_ENUM_CONSTANT(DRAGGER_HIDDEN_COLLAPSED);
 
+	BIND_THEME_ITEM(Theme::DATA_TYPE_COLOR, SplitContainer, touch_dragger_color);
+	BIND_THEME_ITEM(Theme::DATA_TYPE_COLOR, SplitContainer, touch_dragger_pressed_color);
+	BIND_THEME_ITEM(Theme::DATA_TYPE_COLOR, SplitContainer, touch_dragger_hover_color);
 	BIND_THEME_ITEM(Theme::DATA_TYPE_CONSTANT, SplitContainer, separation);
 	BIND_THEME_ITEM(Theme::DATA_TYPE_CONSTANT, SplitContainer, minimum_grab_thickness);
 	BIND_THEME_ITEM(Theme::DATA_TYPE_CONSTANT, SplitContainer, autohide);

scene/gui/split_container.h

@@ -88,6 +88,9 @@ private:
 	TextureRect *touch_dragger = nullptr;
 
 	struct ThemeCache {
+		Color touch_dragger_color;
+		Color touch_dragger_pressed_color;
+		Color touch_dragger_hover_color;
 		int separation = 0;
 		int minimum_grab_thickness = 0;
 		bool autohide = false;

scene/theme/default_theme.cpp

@@ -1204,6 +1204,10 @@ void fill_default_theme(Ref<Theme> &theme, const Ref<Font> &default_font, const
 
 	// Containers
 
+	theme->set_color("touch_dragger_color", "SplitContainer", Color(1, 1, 1, 0.3));
+	theme->set_color("touch_dragger_pressed_color", "SplitContainer", Color(1, 1, 1, 1));
+	theme->set_color("touch_dragger_hover_color", "SplitContainer", Color(1, 1, 1, 0.6));
+
 	theme->set_icon("h_touch_dragger", "SplitContainer", icons["h_dragger"]);
 	theme->set_icon("v_touch_dragger", "SplitContainer", icons["v_dragger"]);
 	theme->set_icon("touch_dragger", "VSplitContainer", icons["v_dragger"]);