implement #3337

Author: jef-n

src/gui/qgsquerybuilder.cpp

@@ -47,6 +47,8 @@ QgsQueryBuilder::QgsQueryBuilder( QgsVectorLayer *layer,
 
   mOrigSubsetString = layer->subsetString();
 
+  mUseUnfilteredLayer->setDisabled( mLayer->subsetString().isEmpty() );
+
   lblDataUri->setText( layer->name() );
   txtSQL->setText( mOrigSubsetString );
 
@@ -124,31 +126,54 @@ void QgsQueryBuilder::on_btnSampleValues_clicked()
 {
   lstValues->setCursor( Qt::WaitCursor );
 
+  QString prevSubsetString = mLayer->subsetString();
+  if ( mUseUnfilteredLayer->isChecked() && !prevSubsetString.isEmpty() )
+  {
+    mLayer->setSubsetString( "" );
+  }
+
   //delete connection mModelValues and lstValues
   QStandardItemModel *tmp = new QStandardItemModel();
   lstValues->setModel( tmp );
   //Clear and fill the mModelValues
   fillValues( mModelFields->data( lstFields->currentIndex(), Qt::UserRole + 1 ).toInt(), 25 );
   lstValues->setModel( mModelValues );
-  lstValues->setCursor( Qt::ArrowCursor );
   //delete the tmp
   delete tmp;
 
+  if ( prevSubsetString != mLayer->subsetString() )
+  {
+    mLayer->setSubsetString( prevSubsetString );
+  }
+
+  lstValues->setCursor( Qt::ArrowCursor );
 }
 
 void QgsQueryBuilder::on_btnGetAllValues_clicked()
 {
   lstValues->setCursor( Qt::WaitCursor );
 
+  QString prevSubsetString = mLayer->subsetString();
+  if ( mUseUnfilteredLayer->isChecked() && !prevSubsetString.isEmpty() )
+  {
+    mLayer->setSubsetString( "" );
+  }
+
   //delete connection mModelValues and lstValues
   QStandardItemModel *tmp = new QStandardItemModel();
   lstValues->setModel( tmp );
   //Clear and fill the mModelValues
   fillValues( mModelFields->data( lstFields->currentIndex(), Qt::UserRole + 1 ).toInt(), -1 );
   lstValues->setModel( mModelValues );
-  lstValues->setCursor( Qt::ArrowCursor );
   //delete the tmp
   delete tmp;
+
+  if ( prevSubsetString != mLayer->subsetString() )
+  {
+    mLayer->setSubsetString( prevSubsetString );
+  }
+
+  lstValues->setCursor( Qt::ArrowCursor );
 }
 
 void QgsQueryBuilder::test()
@@ -159,6 +184,8 @@ void QgsQueryBuilder::test()
 
   if ( mLayer->setSubsetString( txtSQL->toPlainText() ) )
   {
+    mUseUnfilteredLayer->setDisabled( mLayer->subsetString().isEmpty() );
+
     QMessageBox::information( this,
                               tr( "Query Result" ),
                               tr( "The where clause returned %n row(s).", "returned test rows", mLayer->featureCount() ) );
@@ -319,12 +346,14 @@ void QgsQueryBuilder::clear()
 {
   txtSQL->clear();
   mLayer->setSubsetString( "" );
+  mUseUnfilteredLayer->setDisabled( true );
 }
 
 void QgsQueryBuilder::on_btnILike_clicked()
 {
   txtSQL->insertPlainText( " ILIKE " );
 }
+
 void QgsQueryBuilder::setDatasourceDescription( QString uri )
 {
   lblDataUri->setText( uri );

src/ui/qgsquerybuilderbase.ui

@@ -125,6 +125,16 @@ p, li { white-space: pre-wrap; }
         </property>
        </widget>
       </item>
+      <item row="2" column="0" colspan="2">
+       <widget class="QCheckBox" name="mUseUnfilteredLayer">
+        <property name="enabled">
+         <bool>false</bool>
+        </property>
+        <property name="text">
+         <string>Use unfiltered layer</string>
+        </property>
+       </widget>
+      </item>
      </layout>
     </widget>
    </item>