From 8e86e2bf7fa91f039411a838e5ee16ff8434ba6b Mon Sep 17 00:00:00 2001
From: GriffinR <griffin.g.richards@gmail.com>
Date: Fri, 21 Feb 2025 15:40:00 -0500
Subject: [PATCH] Fix tile usage not updating with Undo/Redo

---
 src/ui/tileseteditor.cpp | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/ui/tileseteditor.cpp b/src/ui/tileseteditor.cpp
index 68f2dbeb..f88e6205 100644
--- a/src/ui/tileseteditor.cpp
+++ b/src/ui/tileseteditor.cpp
@@ -843,6 +843,18 @@ bool TilesetEditor::replaceMetatile(uint16_t metatileId, const Metatile * src, Q
     if (metatileId == this->getSelectedMetatileId())
         this->ui->lineEdit_metatileLabel->setText(newLabel);
 
+    // Update tile usage if any tiles changed
+    if (this->tileSelector && this->tileSelector->showUnused) {
+        int numTiles = projectConfig.getNumTilesInMetatile();
+        for (int i = 0; i < numTiles; i++) {
+            if (src->tiles[i].tileId != dest->tiles[i].tileId) {
+                this->tileSelector->usedTiles[src->tiles[i].tileId] += 1;
+                this->tileSelector->usedTiles[dest->tiles[i].tileId] -= 1;
+            }
+        }
+        this->tileSelector->draw();
+    }
+
     this->metatile = dest;
     *this->metatile = *src;
     this->metatileSelector->select(metatileId);