initial view version

annotationitem.py

@@ -0,0 +1,32 @@
+from PyQt4.QtGui import *
+from PyQt4.Qt import *
+
+class AnnotationGraphicsItem(QAbstractGraphicsShapeItem):
+    def __init__(self,controls_enabled=True, parent=None, **kwargs):
+        super(AnnotationGraphicsItem, self).__init__(parent)
+
+        self.setFlags(QGraphicsItem.ItemIsSelectable|QGraphicsItem.ItemIsMovable)
+
+        self.text_font_ = QFont()
+        self.text_font_.setPointSize(4)
+        self.text_item_ = QGraphicsSimpleTextItem()
+        self.text_item_.setFont(self.text_font_)
+        self.updateText()
+
+    def boundingRect(self):
+        return QRectF(0, 0, 0, 0)
+
+    def updateText(self):
+        self.text_item_.setText("CLASS")
+
+    def itemChange(self, change, value):
+        if change == QGraphicsItem.ItemSelectedChange:
+            self.setControlsVisible(value.toBool())
+        return QGraphicsItem.itemChange(self, change, value)
+
+    def setControlsVisible(self, visible=True):
+        self.controls_visible_ = visible
+        #for corner in self.corner_items_:
+        #    corner.setVisible(self.controls_enabled_ and self.controls_visible_)
+
+