[qet] qet/qet: [4940] Fix the lose of the text of element text item tagged " label" in some case.

[subversion@xxxxxxxxxxxxx]

Revision: 4940
Author:   blacksun
Date:     2017-03-31 19:09:04 +0200 (Fri, 31 Mar 2017)
Log Message:
-----------
Fix the lose of the text of element text item tagged "label" in some case.
See the diff for more information.

Modified Paths:
--------------
    trunk/sources/qetgraphicsitem/element.cpp

Modified: trunk/sources/qetgraphicsitem/element.cpp
===================================================================
--- trunk/sources/qetgraphicsitem/element.cpp	2017-03-31 15:48:14 UTC (rev 4939)
+++ trunk/sources/qetgraphicsitem/element.cpp	2017-03-31 17:09:04 UTC (rev 4940)
@@ -394,7 +394,14 @@
 	@return true si l'import a reussi, false sinon
 	
 */
-bool Element::fromXml(QDomElement &e, QHash<int, Terminal *> &table_id_adr, bool handle_inputs_rotation) {
+bool Element::fromXml(QDomElement &e, QHash<int, Terminal *> &table_id_adr, bool handle_inputs_rotation)
+{
+	QDomDocument doc = e.ownerDocument();
+	QDomElement root = doc.documentElement();
+	double saved_version = -1;
+	if(root.tagName() == "project")
+		saved_version = root.attribute("version", "-1").toDouble();
+		
 	/*
 		les bornes vont maintenant etre recensees pour associer leurs id a leur adresse reelle
 		ce recensement servira lors de la mise en place des fils
@@ -483,6 +490,30 @@
 	{
 		m_element_informations.addValue("formula", m_element_informations["label"]);
 	}
+	
+		/**
+		  * At the start of the 0.51 devel, if the text item with tagg "label" was edited directly in the diagram,
+		  * the text was not write to the element information value "formula".
+		  * During the devel, this behavior change, when user edit the text item direclty in the diagram,
+		  * the text was also write in the element information.
+		  * Then when open a .qet file, the text item with tagg "label", is write with the value stored in the element information.
+		  * The mistake is :
+		  * if user write directly in the diagram  with a version befor the change (so the text is not in the element information),
+		  * and open the project with a version after the change, then the text item with tagg "label" is empty. 
+		  * The code below fix this.
+		  */
+	if (saved_version > -1 && saved_version <= 0.51)
+	{
+		if (ElementTextItem *eti = taggedText("label"))
+		{
+			if (m_element_informations["label"].toString().isEmpty() &&
+				m_element_informations["formula"].toString().isEmpty() &&
+				!eti->toPlainText().isEmpty())
+			{
+				m_element_informations.addValue("formula", eti->toPlainText());
+			}
+		}
+	}
 
 	//Position and selection.
 	//We directly call setPos from QGraphicsObject, because QetGraphicsItem will snap to grid