[composer] Don't update atlas filter until editing finished, prevente…

…d, prevents errors while creating filter expression

src/app/composer/qgsatlascompositionwidget.cpp

@@ -404,15 +404,15 @@ void QgsAtlasCompositionWidget::on_mAtlasFeatureFilterCheckBox_stateChanged( int
   updateAtlasFeatures();
 }
 
-void QgsAtlasCompositionWidget::on_mAtlasFeatureFilterEdit_textChanged( const QString& text )
+void QgsAtlasCompositionWidget::on_mAtlasFeatureFilterEdit_editingFinished()
 {
   QgsAtlasComposition* atlasMap = &mComposition->atlasComposition();
   if ( !atlasMap )
   {
     return;
   }
 
-  atlasMap->setFeatureFilter( text );
+  atlasMap->setFeatureFilter( mAtlasFeatureFilterEdit->text() );
   updateAtlasFeatures();
 }
 
@@ -431,8 +431,9 @@ void QgsAtlasCompositionWidget::on_mAtlasFeatureFilterButton_clicked()
     QString expression =  exprDlg.expressionText();
     if ( !expression.isEmpty() )
     {
-      // will emit a textChanged signal
       mAtlasFeatureFilterEdit->setText( expression );
+      atlasMap->setFeatureFilter( mAtlasFeatureFilterEdit->text() );
+      updateAtlasFeatures();
     }
   }
 }

src/app/composer/qgsatlascompositionwidget.h

@@ -47,7 +47,7 @@ class QgsAtlasCompositionWidget:
     void on_mAtlasSortFeatureCheckBox_stateChanged( int state );
     void on_mAtlasSortFeatureKeyComboBox_currentIndexChanged( int index );
     void on_mAtlasSortFeatureDirectionButton_clicked();
-    void on_mAtlasFeatureFilterEdit_textChanged( const QString& text );
+    void on_mAtlasFeatureFilterEdit_editingFinished();
     void on_mAtlasFeatureFilterButton_clicked();
     void on_mAtlasFeatureFilterCheckBox_stateChanged( int state );
     void on_mAtlasMarginSpinBox_valueChanged( int value );