Textbox example.

src/ui/CMakeLists.txt

@@ -10,4 +10,5 @@ target_sources(${DUSK_TARGET_NAME}
     uitext.c
     uifps.c
     uiframe.c
+    uitextbox.c
 )

src/ui/ui.c

@@ -11,6 +11,7 @@
 #include "util/memory.h"
 #include "display/tileset/tileset_minogram.h"
 #include "display/screen.h"
+#include "ui/uitextbox.h"
 
 ui_t UI;
 
@@ -31,6 +32,8 @@ void uiUpdate(void) {
   UI.camera.orthographic.right = SCREEN.width;
   UI.camera.orthographic.top = 0;
   UI.camera.orthographic.bottom = SCREEN.height;
+
+  uiTextboxUpdate();
 }
 
 void uiRender(void) {
@@ -39,6 +42,7 @@ void uiRender(void) {
   // Render UI elements here
   if(UI.fontTexture.width > 0) {
     uiFPSRender(UI.fontTileset, &UI.fontTexture);
+    uiTextboxRender();
   }
 
   cameraPopMatrix();

src/ui/uitextbox.c

@@ -0,0 +1,45 @@
+/**
+ * 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);
+}

src/ui/uitextbox.h

@@ -0,0 +1,19 @@
+/**
+ * Copyright (c) 2025 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#pragma once
+#include "dusk.h"
+
+/**
+ * Updates the RPG textbox state.
+ */
+void uiTextboxUpdate();
+
+/**
+ * Draws the RPG textbox if it is visible.
+ */
+void uiTextboxRender();