[composer] Correctly set initial state of atlas filename expression button (fix #10499)

nyalldawson · nyalldawson · commit bfb5aaf5481e · 2014-06-11T20:21:01.000+10:00
diff --git a/src/app/composer/qgsatlascompositionwidget.cpp b/src/app/composer/qgsatlascompositionwidget.cpp
@@ -312,7 +312,7 @@ void QgsAtlasCompositionWidget::updateGuiElements()
 
   mAtlasSingleFileCheckBox->setCheckState( atlasMap->singleFile() ? Qt::Checked : Qt::Unchecked );
   mAtlasFilenamePatternEdit->setEnabled( !atlasMap->singleFile() );
-  mAtlasFilenameExpressionButton->setEnabled( atlasMap->singleFile() );
+  mAtlasFilenameExpressionButton->setEnabled( !atlasMap->singleFile() );
 
   mAtlasSortFeatureCheckBox->setCheckState( atlasMap->sortFeatures() ? Qt::Checked : Qt::Unchecked );
   mAtlasSortFeatureDirectionButton->setEnabled( atlasMap->sortFeatures() );
