From 9e917b7f88963a7996d5d09c99e4ca41bde60e56 Mon Sep 17 00:00:00 2001
From: Lukáš Lalinský <lalinsky@gmail.com>
Date: Sun, 7 Dec 2008 13:05:23 +0100
Subject: Make item moves undo-able

---
 src/diagramdocument.cpp | 28 +++++++++++++++++++++++++++-
 1 file changed, 27 insertions(+), 1 deletion(-)

(limited to 'src/diagramdocument.cpp')

diff --git a/src/diagramdocument.cpp b/src/diagramdocument.cpp
index 573d08c..fe8c53f 100644
--- a/src/diagramdocument.cpp
+++ b/src/diagramdocument.cpp
@@ -18,6 +18,7 @@
 #include "databasetable.h"
 #include "databaserelationship.h"
 #include "column.h"
+#include "commands.h"
 #include <QGraphicsItem>
 #include <QDebug>
 #include <QFile>
@@ -27,7 +28,7 @@ DiagramDocument::DiagramDocument(QObject *parent)
 	: QGraphicsScene(parent), m_mode(DiagramDocument::Select), m_line(NULL)
 {
 	m_undoStack = new QUndoStack(this);
-	connect(this, SIGNAL(tableMoved(DatabaseTable *)), SLOT(updatePositions(DatabaseTable *)));
+	//connect(this, SIGNAL(tableMoved(DatabaseTable *)), SLOT(updatePositions(DatabaseTable *)));
 }
 
 DiagramDocument::Mode
@@ -51,9 +52,27 @@ DiagramDocument::updatePositions(DatabaseTable *table)
 	}
 }
 
+void
+DiagramDocument::itemMoved(DiagramItem *item)
+{
+	if (m_trackingMoves) {
+		if (!m_movedItems.contains(item)) {
+			m_movedItems[item] = item->pos();
+		}
+	}
+}
+
+void
+DiagramDocument::itemHasMoved(DiagramItem *item)
+{
+	updatePositions(static_cast<DatabaseTable*>(item));
+}
+
 void
 DiagramDocument::mousePressEvent(QGraphicsSceneMouseEvent *event)
 {
+	m_movedItems.clear();
+	m_trackingMoves = true;
 	if (m_mode == AddTable && event->button() == Qt::LeftButton) {
 		DatabaseTable *table = new DatabaseTable();
 		table->setPos(event->scenePos());
@@ -112,6 +131,13 @@ DiagramDocument::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
 		return;
 	}
 	QGraphicsScene::mouseReleaseEvent(event);
+	m_trackingMoves = false;
+
+	QMapIterator<DiagramItem *, QPointF> i(m_movedItems);
+	while (i.hasNext()) {
+		i.next();
+		undoStack()->push(new MoveItemCommand(i.key(), i.value(), i.key()->pos()));
+	}
 }
 
 DatabaseTable *
-- 
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