db backend: mostly feature-complete

tagitem.cpp

@@ -0,0 +1,31 @@
+#include "tagitem.h"
+
+TagItem::TagItem(const Tag &tag)
+    : valid(true)
+{
+    setFlags(QGraphicsItem::ItemIsMovable
+             | QGraphicsItem::ItemIsSelectable
+             | QGraphicsItem::ItemIsFocusable);
+    /* TODO text_it.setFlags(QGraphicsItem::ItemIgnoresTransformations);
+     */
+    tagUpdated(tag);
+}
+
+void TagItem::tagUpdated(const Tag &tag)
+{
+    m_tag = tag;
+    setText(tag.name);
+    setPos(tag.anchor);
+}
+
+QVariant TagItem::itemChange(QGraphicsItem::GraphicsItemChange change, const QVariant &value)
+{
+    if (change == ItemPositionChange) {
+        /* https://gist.github.com/csukuangfj/c2a06416062bec9ed99eddd705c21275#file-qgraphicsscenetest-cpp-L90
+         *
+         */
+        /* FIXME */
+
+    }
+    return QGraphicsItem::itemChange(change, value);
+}