add settings panel

src/GUI/SettingsPanel.cpp

@@ -1,10 +1,52 @@
+#include <string>
 #include "imgui.h"
 #include "Imgui.hpp"
+#include "XashSettings.hpp"
+#include "StyleSettings.hpp"
 
-namespace Xash::GUI
+namespace Xash
 {
-	void Imgui::DrawSettingsPanel()
-    {
-        ImGui::Text("--------SETTINGS--------");
-	}
-}
+	namespace GUI
+	{
+		static void customTheme()
+		{
+			constexpr std::string_view backgroundLabel = "Background Color";
+			constexpr std::string_view textLabel = "Text Color";
+			constexpr std::string_view borderLabel = "Border Color";
+			constexpr std::string_view buttonLabel = "Button Color";
+			auto &style = Settings::StyleSettings::GetInstance();
+
+			Imgui::CustomColorPicker(
+				backgroundLabel,
+				[&style]() -> const Vector4 & { return style.GetBackgroundColor(); },
+				[&style](const Vector4 &color) { style.SetBackgroundColor(color); },
+				ImGuiCol_WindowBg
+			);
+			Imgui::CustomColorPicker(
+				textLabel, [&style]() -> const Vector4 & { return style.GetTextColor(); },
+				[&style](const Vector4 &color) { style.SetTextColor(color); },
+				ImGuiCol_Text
+			);
+			Imgui::CustomColorPicker(
+				borderLabel,
+				[&style]() -> const Vector4 & { return style.GetBorderColor(); },
+				[&style](const Vector4 &color) { style.SetBorderColor(color); },
+				ImGuiCol_Border
+			);
+			Imgui::CustomColorPicker(
+				buttonLabel,
+				[&style]() -> const Vector4 & { return style.GetButtonColor(); },
+				[&style](const Vector4 &color) { style.SetButtonColor(color); },
+				ImGuiCol_Button
+			);
+		}
+
+		void Imgui::DrawSettingsPanel()
+		{
+			if (ImGui::CollapsingHeader("Custom Theme"))
+			{
+				customTheme();
+			}
+		}
+	} // namespace GUI
+} // namespace Xash