add imgui support

include/client/ClientApp.h

@@ -22,6 +22,10 @@ class ClientApp : public Nz::ApplicationComponent {
 
 	void Update(Nz::Time elapsedTime) override;
 
+	Nz::Window* GetWindow() {
+		return m_Window;
+	}
+
   private:
 	Nz::Window* m_Window;
 	std::unique_ptr<Nz::StateMachine> m_StateMachine;

include/client/ImGuiAppComponent.h

@@ -0,0 +1,33 @@
+#pragma once
+
+#include <Nazara/Core/ApplicationComponent.hpp>
+
+namespace Nz {
+
+class Window;
+class Texture;
+
+}  // namespace Nz
+
+namespace blitz {
+namespace client {
+
+class StateData;
+
+class ImGuiAppComponent : public Nz::ApplicationComponent {
+  public:
+	ImGuiAppComponent(Nz::ApplicationBase& app, Nz::Window& a_Window);
+	~ImGuiAppComponent();
+
+	void Update(Nz::Time elapsedTime) override;
+
+  private:
+	Nz::Window& m_Window;
+	std::shared_ptr<Nz::Texture> m_FontTexture;
+
+	void SetStyle();
+	void UpdateFontTexture();
+};
+
+}  // namespace client
+}  // namespace blitz

include/client/states/ImGuiDrawer.h

@@ -0,0 +1,17 @@
+#pragma once
+
+#include <NazaraImgui/ImguiHandler.hpp>
+
+namespace blitz {
+namespace client {
+
+class ImGuiDrawer : private Nz::ImguiHandler {
+  protected:
+	ImGuiDrawer();
+	~ImGuiDrawer();
+
+	virtual void OnRenderImgui() = 0;
+};
+
+}  // namespace client
+}  // namespace blitz

include/client/states/MainMenuState.h

@@ -2,11 +2,12 @@
 
 #include <Nazara/Widgets/ButtonWidget.hpp>
 #include <client/states/AbstractState.h>
+#include <client/states/ImGuiDrawer.h>
 
 namespace blitz {
 namespace client {
 
-class MainMenuState : public AbstractState {
+class MainMenuState : public AbstractState, private ImGuiDrawer {
   public:
 	MainMenuState(std::shared_ptr<StateData>);
 	~MainMenuState();
@@ -21,6 +22,8 @@ class MainMenuState : public AbstractState {
 	void LayoutWidgets() override;
 	bool Update(Nz::StateMachine& fsm, Nz::Time elapsedTime) override;
 
+	void OnRenderImgui() override;
+
 	void OnJoinServerPressed();
 	void OnCreateServerPressed();
 	void OnOptionPressed();