add highlighted widget option to list_provider

Author: igagis

src/ruis/widget/base/list_widget.cpp

@@ -27,6 +27,11 @@ list_provider::list_provider(utki::shared_ref<ruis::context> context) :
 	context(std::move(context))
 {}
 
+utki::shared_ref<widget> list_provider::get_highlighted_widget(size_t index)
+{
+	return this->get_widget(index);
+}
+
 void list_provider::notify_model_change()
 {
 	if (!this->owner) {

src/ruis/widget/base/list_widget.hpp

@@ -68,6 +68,14 @@ class list_provider
 	 */
 	virtual utki::shared_ref<widget> get_widget(size_t index) = 0;
 
+	/**
+	 * @brief Get widget for a highlighted item.
+	 * Default implemetation just falls back to calling get_widget().
+	 * @param index - index of the item to provide widget for.
+	 * @return Widget for requested item.
+	 */
+	virtual utki::shared_ref<widget> get_highlighted_widget(size_t index);
+
 	/**
 	 * @brief Notify about change of items model.
 	 * The user is supposed to invoke this function when items model change.

src/ruis/widget/button/selection_box.cpp

@@ -53,7 +53,7 @@ void selection_box::handle_model_change()
 		return;
 	}
 
-	this->selection_container.push_back(this->get_provider().get_widget(this->get_selection()));
+	this->selection_container.push_back(this->get_provider().get_highlighted_widget(this->get_selection()));
 }
 
 void selection_box::set_selection(size_t i)

tests/touch/src/scroll_area_page.cpp

@@ -64,7 +64,30 @@ class theme_selection_provider : public ruis::list_provider
 
 	utki::shared_ref<ruis::widget> get_widget(size_t index) override
 	{
-		return m::text(this->context, {}, this->items.at(index));
+		// clang-format off
+		return m::text(this->context,
+			{
+				.color_params{
+					.color = this->context.get().style().get_color_text_normal()
+				}
+			},
+			this->items.at(index)
+		);
+		// clang-format on
+	}
+
+	utki::shared_ref<ruis::widget> get_highlighted_widget(size_t index) override
+	{
+		// clang-format off
+		return m::text(this->context,
+			{
+				.color_params{
+					.color = this->context.get().style().get_color_highlight()
+				}
+			},
+			this->items.at(index)
+		);
+		// clang-format on
 	}
 };