python/core/qgspythonrunner.sip

@@ -12,6 +12,9 @@ class QgsPythonRunner
     /** execute a python statement */
     static bool run( QString command, QString messageOnError = QString() );
 
+    /** Eval a python statement */
+    static bool eval( QString command, QString& result);
+
     /** assign an instance of python runner so that run() can be used.
       This method should be called during app initialization.
       Takes ownership of the object, deletes previous instance. */
@@ -23,4 +26,6 @@ class QgsPythonRunner
     virtual ~QgsPythonRunner();
 
     virtual bool runCommand( QString command, QString messageOnError = QString() ) = 0;
+
+    virtual bool evalCommand( QString command, QString& result ) = 0;
 };

src/app/qgisapp.cpp

@@ -6232,6 +6232,7 @@ class QgsPythonRunnerImpl : public QgsPythonRunner
 {
   public:
     QgsPythonRunnerImpl( QgsPythonUtils* pythonUtils ) : mPythonUtils( pythonUtils ) {}
+
     virtual bool runCommand( QString command, QString messageOnError = QString() )
     {
       if ( mPythonUtils && mPythonUtils->isEnabled() )
@@ -6241,6 +6242,15 @@ class QgsPythonRunnerImpl : public QgsPythonRunner
       return false;
     }
 
+    virtual bool evalCommand( QString command, QString &result )
+    {
+        if  ( mPythonUtils && mPythonUtils->isEnabled() )
+        {
+            return mPythonUtils->evalString( command, result );
+        }
+        return false;
+    }
+
   protected:
     QgsPythonUtils* mPythonUtils;
 };

src/core/qgspythonrunner.cpp

@@ -38,6 +38,19 @@ bool QgsPythonRunner::run( QString command, QString messageOnError )
   }
 }
 
+bool QgsPythonRunner::eval( QString command, QString& result )
+{
+    if ( mInstance )
+    {
+        return mInstance->evalCommand( command, result );
+    }
+    else
+    {
+      QgsDebugMsg( "Unable to run Python command: runner not available!" );
+      return false;
+    }
+}
+
 void QgsPythonRunner::setInstance( QgsPythonRunner* runner )
 {
   delete mInstance;

src/core/qgspythonrunner.h

@@ -37,6 +37,9 @@ class CORE_EXPORT QgsPythonRunner
     /** execute a python statement */
     static bool run( QString command, QString messageOnError = QString() );
 
+    /** Eval a python statement */
+    static bool eval( QString command, QString& result);
+
     /** assign an instance of python runner so that run() can be used.
       This method should be called during app initialization.
       Takes ownership of the object, deletes previous instance. */
@@ -49,6 +52,8 @@ class CORE_EXPORT QgsPythonRunner
 
     virtual bool runCommand( QString command, QString messageOnError = QString() ) = 0;
 
+    virtual bool evalCommand( QString command, QString& result ) = 0;
+
     static QgsPythonRunner* mInstance;
 };
 

src/gui/qgsattributedialog.cpp

@@ -346,6 +346,14 @@ QgsAttributeDialog::QgsAttributeDialog( QgsVectorLayer *vl, QgsFeature *thepFeat
       QgsPythonRunner::run( QString( "import %1" ).arg( module.left( pos ) ) );
     }
 
+    /* Reload the module if the DEBUGMODE switch has been set in the module.
+     If set to False you have to reload QGIS to reset it to True due to Python
+     module caching */
+    QString reload = QString("if hasattr(%1,'DEBUGMODE') and %1.DEBUGMODE:"
+                             "    reload(%1)").arg( module.left( pos ) );
+
+    QgsPythonRunner::run( reload );
+
     mFormNr = smFormCounter++;
 
     QString form =  QString( "_qgis_featureform_%1 = wrapinstance( %2, QtGui.QDialog )" )