[fix #19868] fix paste style

src/app/qgsapplayertreeviewmenuprovider.cpp

@@ -363,7 +363,7 @@ QMenu *QgsAppLayerTreeViewMenuProvider::createContextMenu()
               QIcon icon = model->data( index, Qt::DecorationRole ).value<QIcon>();
               QAction *copyAction = new QAction( icon, name, pasteStyleMenu );
               copyAction->setToolTip( tooltip );
-              connect( copyAction, &QAction::triggered, this, [ = ]() {app->copyStyle( layer, category );} );
+              connect( copyAction, &QAction::triggered, this, [ = ]() {app->pasteStyle( layer, category );} );
               pasteStyleMenu->addAction( copyAction );
               if ( category == QgsMapLayer::AllStyleCategories )
                 pasteStyleMenu->addSeparator();

src/app/qgsmaplayerstylecategoriesmodel.cpp

@@ -63,12 +63,16 @@ QVariant QgsMapLayerStyleCategoriesModel::data( const QModelIndex &index, int ro
   if ( !index.isValid() || index.row() >= rowCount() )
     return QVariant();
 
-  QgsMapLayer::StyleCategory category = mCategoryList.at( index.row() );
+  QgsMapLayer::StyleCategory category = mCategoryList.at( index.row() + ( mShowAllCategories ? 0 : 1 ) );
 
   if ( role == Qt::UserRole )
   {
     return category;
   }
+  if ( role == Qt::CheckStateRole )
+  {
+    return mCategories.testFlag( category ) ? Qt::Checked : Qt::Unchecked;
+  }
 
   switch ( category )
   {
@@ -226,7 +230,7 @@ bool QgsMapLayerStyleCategoriesModel::setData( const QModelIndex &index, const Q
 
   if ( role == Qt::CheckStateRole )
   {
-    QgsMapLayer::StyleCategory category = mCategoryList.at( index.row() );
+    QgsMapLayer::StyleCategory category = data( index, Qt::UserRole ).value<QgsMapLayer::StyleCategory>();
     if ( value.value<Qt::CheckState>() == Qt::Checked )
     {
       mCategories |= category;
@@ -246,5 +250,5 @@ bool QgsMapLayerStyleCategoriesModel::setData( const QModelIndex &index, const Q
 
 Qt::ItemFlags QgsMapLayerStyleCategoriesModel::flags( const QModelIndex & ) const
 {
-  return Qt::ItemIsEnabled | Qt::ItemIsUserCheckable;
+  return Qt::ItemIsEnabled | Qt::ItemIsEditable | Qt::ItemIsUserCheckable;
 }