New method to add a scope to the current context

qgis · Apr 26, 2018 · b13ba37 · b13ba37
1 parent 4f4844f
commit b13ba37
Show file tree

Hide file tree

Showing 3 changed files with 23 additions and 0 deletions.
diff --git a/python/gui/qgsfieldexpressionwidget.sip.in b/python/gui/qgsfieldexpressionwidget.sip.in
@@ -36,6 +36,15 @@ only when editing in the line edit is finished (focus lost, enter key pressed).
     void setExpressionDialogTitle( const QString &title );
 %Docstring
 define the title used in the expression dialog
+%End
+
+    void appendScope( QgsExpressionContextScope *scope /Transfer/ );
+%Docstring
+Appends a scope to the current expression context.
+
+:param scope: The scope to add.
+
+.. versionadded:: 3.2
 %End
 
     const QString expressionDialogTitle();

diff --git a/src/gui/qgsfieldexpressionwidget.cpp b/src/gui/qgsfieldexpressionwidget.cpp
@@ -346,3 +346,8 @@ bool QgsFieldExpressionWidget::isExpressionValid( const QString &expressionStr )
   expression.prepare( &mExpressionContext );
   return !expression.hasParserError();
 }
+
+void QgsFieldExpressionWidget::appendScope( QgsExpressionContextScope *scope )
+{
+  mExpressionContext.appendScope( scope );
+}
diff --git a/src/gui/qgsfieldexpressionwidget.h b/src/gui/qgsfieldexpressionwidget.h
@@ -60,6 +60,15 @@ class GUI_EXPORT QgsFieldExpressionWidget : public QWidget
     //! define the title used in the expression dialog
     void setExpressionDialogTitle( const QString &title );
 
+    /**
+     * Appends a scope to the current expression context.
+     *
+     * \param scope The scope to add.
+     *
+     * \since QGIS 3.2
+     */
+    void appendScope( QgsExpressionContextScope *scope SIP_TRANSFER );
+
     //! return the title used for the expression dialog
     const QString expressionDialogTitle() { return mExpressionDialogTitle; }