Set up user interface integration

src/Asteroid.c

@@ -917,6 +917,32 @@ void asteroid_gameUpdateAndRender(GameState *state, Memory *memory,
 		                collideColor, flags);
 	}
 
+	{ // Draw Ui
+		UiState *uiState             = &state->uiState;
+		MemoryArena_ *transientArena = &state->transientArena;
+		AssetManager *assetManager   = &state->assetManager;
+		Renderer *renderer           = &state->renderer;
+		InputBuffer *inputBuffer     = &state->input;
+
+		userInterface_beginState(uiState);
+
+		WindowState window = {0};
+		window.id          = userInterface_generateId(uiState);
+
+		Rect windowRect = {0};
+		windowRect.min  = V2(200, 200);
+		windowRect.max  = V2(500, 500);
+
+		window.rect = windowRect;
+
+#if 0
+		userInterface_window(uiState, transientArena, assetManager, renderer,
+		                     &assetManager->font, *inputBuffer, &window);
+#endif
+
+		userInterface_endState(uiState, inputBuffer);
+	}
+
 	for (i32 i = 0; i < world->numAudioRenderers; i++)
 	{
 		AudioRenderer *audioRenderer = &world->audioRenderer[i];

src/UserInterface.c

@@ -1,9 +1,33 @@
 #include "Dengine/UserInterface.h"
 #include "Dengine/AssetManager.h"
 #include "Dengine/Assets.h"
+#include "Dengine/Asteroid.h"
 #include "Dengine/Debug.h"
 #include "Dengine/Renderer.h"
 
+void userInterface_beginState(UiState *state)
+{
+	state->hotItem = 0;
+}
+
+void userInterface_endState(UiState *state, InputBuffer *input)
+{
+	if (!common_isSet(input->keys[keycode_mouseLeft].flags,
+	                  keystateflag_ended_down))
+	{
+		state->activeItem = 0;
+	}
+	else if (state->activeItem == 0)
+	{
+		state->activeItem = -1;
+	}
+
+	if (state->keyEntered == keycode_tab) state->kbdItem = 0;
+
+	state->keyEntered = keycode_null;
+	state->keyChar    = keycode_null;
+}
+
 i32 userInterface_button(UiState *const uiState, MemoryArena_ *const arena,
                          AssetManager *const assetManager,
                          Renderer *const renderer, Font *const font,

src/include/Dengine/Asteroid.h

@@ -8,6 +8,7 @@
 #include "Dengine/MemoryArena.h"
 #include "Dengine/Platform.h"
 #include "Dengine/Renderer.h"
+#include "Dengine/UserInterface.h"
 
 typedef struct World
 {
@@ -48,6 +49,8 @@ typedef struct GameState {
 	AssetManager assetManager;
 	InputBuffer input;
 	Renderer renderer;
+
+	UiState uiState;
 	World world;
 
 } GameState;

src/include/Dengine/UserInterface.h

@@ -10,6 +10,7 @@ typedef struct AssetManager AssetManager;
 typedef struct Font Font;
 typedef struct MemoryArena MemoryArena_;
 typedef struct Renderer Renderer;
+typedef struct GameState GameState;
 
 enum UiType
 {
@@ -76,6 +77,9 @@ inline i32 userInterface_generateId(UiState *const uiState)
 	return result;
 }
 
+void userInterface_beginState(UiState *state);
+void userInterface_endState(UiState *state, InputBuffer *input);
+
 i32 userInterface_button(UiState *const uiState, MemoryArena_ *const arena,
                          AssetManager *const assetManager,
                          Renderer *const renderer, Font *const font,