Add moveable window UI element

src/UserInterface.c

@@ -4,6 +4,40 @@
 #include "Dengine/Renderer.h"
 #include "Dengine/Debug.h"
 
+i32 userInterface_window(UiState *const uiState,
+                         MemoryArena *const arena,
+                         AssetManager *const assetManager,
+                         Renderer *const renderer,
+                         Font *const font,
+                         const KeyInput input,
+                         const i32 id, const Rect rect, const char *const title)
+{
+	if (math_pointInRect(rect, input.mouseP))
+	{
+		uiState->hotItem = id;
+		if (uiState->activeItem == 0 && input.keys[keycode_mouseLeft].endedDown)
+			uiState->activeItem = id;
+	}
+
+	RenderTex nullRenderTex = renderer_createNullRenderTex(assetManager);
+	renderer_staticRect(renderer, rect.pos, rect.size, V2(0, 0), 0,
+	                    nullRenderTex, V4(0.25f, 0.25f, 0.5f, 1.0f));
+
+	char *menuTitle = "Stat Menu";
+	v2 menuTitleP   = v2_add(rect.pos, V2(0, rect.size.h - 10));
+	renderer_staticString(renderer, arena, font, menuTitle, menuTitleP,
+	                      V2(0, 0), 0, V4(0, 0, 0, 1));
+
+	if (input.keys[keycode_mouseLeft].endedDown &&
+	    uiState->hotItem == id &&
+	    uiState->activeItem == id)
+	{
+		return 1;
+	}
+
+	return 0;
+}
+
 i32 userInterface_button(UiState *const uiState,
                          MemoryArena *const arena,
                          AssetManager *const assetManager,
@@ -107,6 +141,8 @@ i32 userInterface_button(UiState *const uiState,
 
 	uiState->lastWidget = id;
 
+	// If button is hot and active, but mouse button is not
+	// down, the user must have clicked the button.
 	if (!input.keys[keycode_mouseLeft].endedDown &&
 	    uiState->hotItem == id &&
 	    uiState->activeItem == id)
@@ -238,6 +274,7 @@ i32 userInterface_textField(UiState *const uiState, MemoryArena *const arena,
 	Rect textRect = {0};
 	textRect.pos = pos;
 	textRect.size = V2(30 * font->maxSize.w, font->maxSize.h);
+
 	if (math_pointInRect(textRect, input.mouseP))
 	{
 		uiState->hotItem = id;

src/WorldTraveller.c

@@ -523,6 +523,12 @@ INTERNAL void parseInput(GameState *state, const f32 dt)
 			state->uiState.keyChar = keycode_space;
 		}
 
+		if (getKeyStatus(&keys[keycode_i], readkeytype_delayedRepeat, 0.25f,
+		                 dt))
+		{
+			state->uiState.keyChar = keycode_i;
+		}
+
 		if (getKeyStatus(&keys[keycode_backspace], readkeytype_delayedRepeat,
 		                 0.1f, dt))
 		{
@@ -1014,8 +1020,9 @@ typedef struct BattleState
 	DamageDisplay damageDisplay[128];
 } BattleState;
 
-BattleState battleState = {0};
+GLOBAL_VAR BattleState battleState = {0};
 
+v2 lastFrameP = {0, 0};
 void worldTraveller_gameUpdateAndRender(GameState *state, f32 dt)
 {
 	if (dt >= 1.0f) dt = 1.0f;
@@ -1332,6 +1339,56 @@ void worldTraveller_gameUpdateAndRender(GameState *state, f32 dt)
 		    (state->config.showDebugDisplay == TRUE) ? FALSE : TRUE;
 	}
 
+	LOCAL_PERSIST toggleShowingStatMenu = FALSE;
+	if (state->uiState.keyChar == keycode_i)
+	{
+		toggleShowingStatMenu =
+		    (toggleShowingStatMenu == TRUE) ? FALSE : TRUE;
+	}
+
+	if (toggleShowingStatMenu)
+	{
+		i32 statMenuID = 99;
+
+		// TODO(doyle): Define pushing/placing text within a coordinate system,
+		// i.e. relative to an elements position
+		char *menuTitle = "Stat Menu";
+
+		LOCAL_PERSIST Rect inventoryRect = {{300, 400}, {300, 400}};
+		LOCAL_PERSIST lastFrameWindowWasHeld = FALSE;
+
+		b32 windowClickedAndHeld = userInterface_window(
+		    &state->uiState, &state->arena, assetManager, renderer, font,
+		    state->input, statMenuID, inventoryRect, menuTitle);
+
+		if (windowClickedAndHeld)
+		{
+			if (lastFrameWindowWasHeld)
+			{
+				// NOTE(doyle): Window clicked and held
+				v2 deltaP = v2_sub(state->input.mouseP, lastFrameP);
+				DEBUG_PUSH_VAR("Delta Pos %4.2f, %4.2f", deltaP, "v2");
+
+				f32 mouseMoveThreshold = 5.0f;
+
+				if (ABS(deltaP.x) <= mouseMoveThreshold) deltaP.x = 0.0f;
+				if (ABS(deltaP.y) <= mouseMoveThreshold) deltaP.y = 0.0f;
+
+				inventoryRect.pos = v2_add(deltaP, inventoryRect.pos);
+			}
+			else
+			{
+				lastFrameWindowWasHeld = TRUE;
+			}
+
+			lastFrameP = state->input.mouseP;
+		}
+		else
+		{
+			lastFrameWindowWasHeld = FALSE;
+		}
+	}
+
 	LOCAL_PERSIST i32 scrollValue = 30;
 	Rect scrollRectA              = {V2(1500, 600), V2(16, 255)};
 	userInterface_scrollBar(&state->uiState, assetManager, renderer,

src/include/Dengine/Renderer.h

@@ -28,6 +28,7 @@ typedef struct RenderTex
 	v4 texRect;
 } RenderTex;
 
+// TODO(doyle): Use z-index occluding for rendering
 RenderTex renderer_createNullRenderTex(AssetManager *const assetManager);
 
 // TODO(doyle): Clean up lines

src/include/Dengine/UserInterface.h

@@ -42,6 +42,12 @@ typedef struct UiState
 	enum KeyCode keyChar;
 } UiState;
 
+i32 userInterface_window(UiState *const uiState, MemoryArena *const arena,
+                         AssetManager *const assetManager,
+                         Renderer *const renderer, Font *const font,
+                         const KeyInput input, const i32 id, const Rect rect,
+                         const char *const title);
+
 i32 userInterface_button(UiState *const uiState,
                          MemoryArena *const arena,
                          AssetManager *const assetManager,