fix help button in query builder

git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@12202 c8812cc2-4d05-0410-92ff-de0c093fc19c

src/app/qgsquerybuilder.cpp

@@ -18,6 +18,7 @@
 #include <QListView>
 #include <QMessageBox>
 #include <QRegExp>
+#include <QPushButton>
 #include "qgslogger.h"
 #include "qgsvectorlayer.h"
 #include "qgsvectordataprovider.h"

src/app/qgsquerybuilder.h

@@ -22,9 +22,10 @@
 #include "ui_qgsquerybuilderbase.h"
 #include "qgisgui.h"
 #include "qgsfield.h"
-#include <QPushButton>
+#include "qgscontexthelp.h"
 
 class QgsVectorLayer;
+
 /*!
  * \class QgsQueryBuilder
  * \brief Query Builder for PostgreSQL layers.
@@ -93,6 +94,9 @@ class QgsQueryBuilder : public QDialog, private Ui::QgsQueryBuilderBase
     void on_btnNot_clicked();
     void on_btnOr_clicked();
 
+    void on_buttonBox_helpRequested() { QgsContextHelp::run( metaObject()->className() ); }
+
+
     /*! Test the constructed sql statement to see if the database likes it.
      * The number of rows that would be returned is displayed in a message box.
      * The test uses a "select count(*) from ..." query to test the SQL