add qgsEnumMap to list all entries (int, string) of enums

3nids · 3nids · commit 3b1b41f39150 · 2018-09-12T11:38:54.000-04:00
diff --git a/python/core/auto_generated/qgis.sip.in b/python/core/auto_generated/qgis.sip.in
@@ -132,6 +132,7 @@ Returns a double ``number``, rounded (as close as possible) to the specified num
 
 
 
+
 double qgsPermissiveToDouble( QString string, bool &ok );
 %Docstring
 Converts a string to a double in a permissive way, e.g., allowing for incorrect
diff --git a/src/core/qgis.h b/src/core/qgis.h
@@ -22,6 +22,8 @@
 #include <QString>
 #include <QRegExp>
 #include <QMetaType>
+#include <QMap>
+#include <QMetaEnum>
 #include <QVariant>
 #include <QDateTime>
 #include <QDate>
@@ -387,6 +389,24 @@ namespace qgis
 ///@endcond
 #endif
 
+/**
+ * Returns a map of all enum entries.
+ * The map has the enum values (int) as keys and the enum keys (QString) as values.
+ * The enum must have been declared using Q_ENUM or Q_FLAG.
+ */
+template<class T> CORE_EXPORT const QMap<T, QString> qgsEnumMap() SIP_SKIP
+{
+  QMetaEnum metaEnum = QMetaEnum::fromType<T>();
+  Q_ASSERT( metaEnum.isValid() );
+  QMap<T, QString> enumMap;
+  for ( int idx = 0; idx < metaEnum.keyCount(); ++idx )
+  {
+    const char *enumKey = metaEnum.key( idx );
+    enumMap.insert( static_cast<T>( metaEnum.keyToValue( enumKey ) ), QString( enumKey ) );
+  }
+  return enumMap;
+};
+
 /**
  * Converts a string to a double in a permissive way, e.g., allowing for incorrect
  * numbers of digits between thousand separators
