changes to QgsDateTimeEdit to support the minimal Date supported by Q…

…DateTimeEdit (0100-01-01)
qgis · Jul 12, 2017 · b7ff59c · b7ff59c
1 parent ad31087
commit b7ff59c
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diff --git a/python/gui/editorwidgets/qgsdatetimeedit.sip b/python/gui/editorwidgets/qgsdatetimeedit.sip
@@ -30,6 +30,18 @@ Determines if the widget allows setting null date/time.
  :rtype: bool
 %End
 
+    void setMinimumEditDateTime();
+%Docstring
+ Set the lowest Date that can be displayed with the Qt.ISODate format
+  - uses QDateTimeEdit.setMinimumDateTime (since Qt 4.4)
+ \note
+  - QDate and QDateTime does not support minus years for the Qt.ISODate format
+  -> returns empty (toString) or invalid (fromString) values
+  - QDateTimeEdit.setMinimumDateTime does not support dates < '0100-01-01'
+  -> it is not for us to wonder why [defined in qdatetimeparser_p.h]
+.. versionadded:: 3.0
+%End
+
     void setDateTime( const QDateTime &dateTime );
 %Docstring
  setDateTime set the date time in the widget and handles null date times.

diff --git a/src/gui/editorwidgets/qgsdatetimeedit.cpp b/src/gui/editorwidgets/qgsdatetimeedit.cpp
@@ -52,6 +52,7 @@ QgsDateTimeEdit::QgsDateTimeEdit( QWidget *parent )
 
   // init with current time so mIsNull is properly initialized
   QDateTimeEdit::setDateTime( QDateTime::currentDateTime() );
+  setMinimumEditDateTime();
 }
 
 void QgsDateTimeEdit::setAllowNull( bool allowNull )

diff --git a/src/gui/editorwidgets/qgsdatetimeedit.h b/src/gui/editorwidgets/qgsdatetimeedit.h
@@ -38,6 +38,20 @@ class GUI_EXPORT QgsDateTimeEdit : public QDateTimeEdit
     void setAllowNull( bool allowNull );
     bool allowNull() const {return mAllowNull;}
 
+    /** Set the lowest Date that can be displayed with the Qt::ISODate format
+     *  - uses QDateTimeEdit::setMinimumDateTime (since Qt 4.4)
+     * \note
+     *  - QDate and QDateTime does not support minus years for the Qt::ISODate format
+     *  -> returns empty (toString) or invalid (fromString) values
+     *  - QDateTimeEdit::setMinimumDateTime does not support dates < '0100-01-01'
+     *  -> it is not for us to wonder why [defined in qdatetimeparser_p.h]
+    * \since QGIS 3.0
+    */
+    void setMinimumEditDateTime()
+    {
+      setMinimumDateTime( QDateTime::fromString( "0100-01-01", Qt::ISODate ) );
+    }
+
     /**
      * \brief setDateTime set the date time in the widget and handles null date times.
      * \note since QDateTimeEdit::setDateTime() is not virtual, setDateTime must be called for QgsDateTimeEdit.