Merge pull request #210 from OpenVicProject/gui-listbox

Add GUIListBox + UI improvements

1 files changed, 58 insertions, 0 deletions

diff --git a/extension/src/openvic-extension/classes/GUIListBox.hpp b/extension/src/openvic-extension/classes/GUIListBox.hpp
new file mode 100644
index 0000000..9d49840
--- /dev/null
+++ b/extension/src/openvic-extension/classes/GUIListBox.hpp
@@ -0,0 +1,58 @@
+#pragma once
+
+#include <godot_cpp/classes/container.hpp>
+
+#include <openvic-simulation/interface/GUI.hpp>
+
+#include "openvic-extension/classes/GUIScrollbar.hpp"
+
+namespace OpenVic {
+	class GUIListBox : public godot::Container {
+		GDCLASS(GUIListBox, godot::Container)
+
+		GUI::ListBox const* PROPERTY(gui_listbox);
+
+		GUIScrollbar* scrollbar;
+
+		struct child_data_t {
+			Control* child;
+			real_t start_pos, height;
+		};
+
+		std::vector<child_data_t> children_data;
+
+		/* The children_data index of the topmost visible child element. */
+		int32_t PROPERTY(scroll_index);
+		int32_t PROPERTY(max_scroll_index);
+
+		godot::Error _calculate_child_arrangement();
+		godot::Error _update_child_positions();
+
+	protected:
+		static void _bind_methods();
+
+		void _notification(int what);
+
+	public:
+		GUIListBox();
+
+		godot::Vector2 _get_minimum_size() const override;
+		void _gui_input(godot::Ref<godot::InputEvent> const& event) override;
+
+		/* Reset gui_listbox to nullptr, and remove all child elements. */
+		void clear();
+
+		/* Remove all child elements except for the scrollbar. */
+		void clear_children();
+
+		void set_scroll_index(int32_t new_scroll_index);
+
+		/* Set the GUI::ListBox. This does not affect any existing child elements. */
+		godot::Error set_gui_listbox(GUI::ListBox const* new_gui_listbox);
+
+		/* Return the name of the GUI::ListBox, or an empty String if it's null. */
+		godot::String get_gui_listbox_name() const;
+
+		GUIScrollbar* get_scrollbar() const;
+	};
+}