Textbox example.

src/ui/uitextbox.c

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+/**
+ * Copyright (c) 2025 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#include "uitextbox.h"
+#include "ui/ui.h"
+#include "ui/uitext.h"
+#include "rpg/rpgtextbox.h"
+#include "display/screen.h"
+#include "display/spritebatch.h"
+#include "input/input.h"
+
+void uiTextboxUpdate() {
+  if(!rpgTextboxIsVisible()) return;
+
+  if(inputPressed(INPUT_ACTION_ACCEPT)) {
+    rpgTextboxHide();
+  }
+}
+
+void uiTextboxRender() {
+  if(!rpgTextboxIsVisible()) return;
+
+  const char_t *text = RPG_TEXTBOX.text;
+  int32_t textWidth, textHeight;
+  
+  uiTextMeasure(text, UI.fontTileset, &textWidth, &textHeight);
+
+  float_t y = 0;
+  if(RPG_TEXTBOX.position == RPG_TEXTBOX_POS_BOTTOM) {
+    y = SCREEN.height - (float_t)textHeight;
+  }
+
+  spriteBatchPush(
+    NULL,
+    0.0f, y,
+    (float_t)SCREEN.width, (float_t)(y + textHeight),
+    COLOR_BLACK,
+    0.0f, 0.0f, 1.0f, 1.0f
+  );
+  uiTextDraw(0, y, text, COLOR_RED, UI.fontTileset, &UI.fontTexture);
+}