Open tileset editor with selected metatile

include/ui/tileseteditor.h

@@ -38,6 +38,7 @@ public:
     ~TilesetEditor();
     void setTilesets(QString, QString);
     void init(Project*, QString, QString);
+    void selectMetatile(uint16_t metatileId);
 
 private slots:
     void onHoveredMetatileChanged(uint16_t);

include/ui/tileseteditormetatileselector.h

@@ -18,6 +18,7 @@ public:
     void setTilesets(Tileset*, Tileset*);
     uint16_t getSelectedMetatile();
     void updateSelectedMetatile();
+    QPoint getMetatileIdCoordsOnWidget(uint16_t metatileId);
 
 protected:
     void mousePressEvent(QGraphicsSceneMouseEvent*);

src/mainwindow.cpp

@@ -2452,6 +2452,7 @@ void MainWindow::on_actionTileset_Editor_triggered()
     } else {
         this->tilesetEditor->activateWindow();
     }
+    this->tilesetEditor->selectMetatile(this->editor->metatile_selector_item->getSelectedMetatiles()->at(0));
 }
 
 void MainWindow::on_toolButton_ExpandAll_clicked()

src/ui/tileseteditor.cpp

@@ -105,6 +105,12 @@ void TilesetEditor::init(Project *project, QString primaryTilesetLabel, QString
     metatileHistory.push(commit);
 }
 
+void TilesetEditor::selectMetatile(uint16_t metatileId) {
+    this->metatileSelector->select(metatileId);
+    QPoint pos = this->metatileSelector->getMetatileIdCoordsOnWidget(metatileId);
+    this->ui->scrollArea_Metatiles->ensureVisible(pos.x(), pos.y());
+}
+
 void TilesetEditor::setTilesets(QString primaryTilesetLabel, QString secondaryTilesetLabel) {
     delete this->primaryTileset;
     delete this->secondaryTileset;

src/ui/tileseteditormetatileselector.cpp

@@ -117,3 +117,10 @@ QPoint TilesetEditorMetatileSelector::getMetatileIdCoords(uint16_t metatileId) {
                 : metatileId - Project::getNumMetatilesPrimary() + this->primaryTileset->metatiles->length();
     return QPoint(index % this->numMetatilesWide, index / this->numMetatilesWide);
 }
+
+QPoint TilesetEditorMetatileSelector::getMetatileIdCoordsOnWidget(uint16_t metatileId) {
+    QPoint pos = getMetatileIdCoords(metatileId);
+    pos.rx() = (pos.x() * this->cellWidth) + (this->cellWidth / 2);
+    pos.ry() = (pos.y() * this->cellHeight) + (this->cellHeight / 2);
+    return pos;
+}