From 04e8dd0b1972fde90d711ccf7ca28130a4adc3b6 Mon Sep 17 00:00:00 2001
From: Lukáš Lalinský <lalinsky@gmail.com>
Date: Sun, 4 Jan 2009 21:16:52 +0100
Subject: Store relationship's colums in XML

---
 src/domutils.h                              | 18 ++++++++++++++++++
 src/items/database/databaserelationship.cpp | 18 ++++++++++++++++++
 2 files changed, 36 insertions(+)

diff --git a/src/domutils.h b/src/domutils.h
index 06b2cf4..a3abcc8 100644
--- a/src/domutils.h
+++ b/src/domutils.h
@@ -118,6 +118,24 @@ readFloatElement(QDomElement &parent, const QString &name, qreal defaultValue =
 	return defaultValue;
 }
 
+inline void
+appendIntElement(QDomDocument &doc, QDomElement &parent, const QString &name, int value)
+{
+	QDomElement element = doc.createElement(name);
+	element.appendChild(doc.createTextNode(QString::number(value)));
+	parent.appendChild(element);
+}
+
+inline int
+readIntElement(QDomElement &parent, const QString &name, int defaultValue = 0)
+{
+	QDomElement element = parent.firstChildElement(name);
+	if (!element.isNull()) {
+		return element.text().toInt();
+	}
+	return defaultValue;
+}
+
 inline void
 appendPointElement(QDomDocument &doc, QDomElement &parent, const QString &name, QPointF value)
 {
diff --git a/src/items/database/databaserelationship.cpp b/src/items/database/databaserelationship.cpp
index e407ce2..aacacf6 100644
--- a/src/items/database/databaserelationship.cpp
+++ b/src/items/database/databaserelationship.cpp
@@ -18,6 +18,7 @@
 #include <QDebug>
 #include "diagramdocument.h"
 #include "column.h"
+#include "columnlist.h"
 #include "databasetable.h"
 #include "line.h"
 #include "databaserelationship.h"
@@ -384,6 +385,15 @@ DatabaseRelationship::loadFromXml(QDomElement element, DiagramDocument *document
 			setChildOptional(readBoolElement(modalityElement, "child", true, "Optional", "Mandatory"));
 			setParentOptional(readBoolElement(modalityElement, "parent", true, "Optional", "Mandatory"));
 		}
+		QDomElement columnsElement = relationshipeElement.firstChildElement("columns");
+		if (!columnsElement.isNull()) {
+			int index = readIntElement(columnsElement, "child", -1);
+			if (index != -1 && childTable())
+				setChildColumn(childTable()->columnList()->column(index));
+			index = readIntElement(columnsElement, "parent", -1);
+			if (index != -1 && parentTable())
+				setParentColumn(parentTable()->columnList()->column(index));
+		}
 	}
 }
 
@@ -398,6 +408,14 @@ DatabaseRelationship::saveToXml(QDomDocument doc, QDomElement element)
 	relationshipeElement.appendChild(modalityElement);
 	appendBoolElement(doc, modalityElement, "child", d->childOptional, "Optional", "Mandatory");
 	appendBoolElement(doc, modalityElement, "parent", d->parentOptional, "Optional", "Mandatory");
+	if (d->childColumn || d->parentColumn) {
+		QDomElement columnsElement = doc.createElement("columns");
+		relationshipeElement.appendChild(columnsElement);
+		if (d->childColumn)
+			appendIntElement(doc, columnsElement, "child", childTable()->columnList()->indexOf(d->childColumn));
+		if (d->parentColumn)
+			appendIntElement(doc, columnsElement, "parent", parentTable()->columnList()->indexOf(d->parentColumn));
+	}
 }
 
 DiagramItemProperties *
-- 
cgit v1.2.3-54-g00ecf