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_)
+
+

annotationscene.py

@@ -0,0 +1,63 @@
+from PyQt4.QtGui import *
+from PyQt4.QtCore import *
+from pointitem import *
+import math
+
+modes = range(5)
+SELECT, POINT, LINE, RECTANGLE, POLYGON = modes
+
+class AnnotationScene(QGraphicsScene):
+    def __init__(self, parent=None):
+        super(AnnotationScene, self).__init__(parent)
+        self.setBackgroundBrush(Qt.darkGray)
+
+        self.reset()
+        self.setSceneRect(0,0, 640, 480)
+
+        self.mode_ = None
+        self.mousePressed_ = None
+        self.activeItem_ = None
+
+    def reset(self):
+        self.clear()
+
+    def setMode(self, mode):
+        assert (mode in modes)
+        self.mode_ = mode
+        print mode
+    
+        
+    def mousePressEvent(self, event):
+        if not self.sceneRect().contains(event.scenePos()):
+            return
+        elif self.mode_ == SELECT:
+            QGraphicsScene.mousePressEvent(self, event)
+            return
+        elif self.mode_ == POINT:
+            self.insertItem(AnnotationGraphicsPointItem(event.scenePos()))
+            event.accept()
+        elif self.mode_ == LINE:
+            self.mousePressed_ = event.scenePos()
+            line = QGraphicsLineItem(QLineF(event.scenePos(), event.scenePos()))
+            self.activeItem_ = line
+            self.addItem(line)
+
+            event.accept()
+        self.update()
+
+    def mouseReleaseEvent(self, event):
+        self.mousePressed_ = None
+        QGraphicsScene.mouseReleaseEvent(self, event)
+        
+    def mouseMoveEvent(self, event):
+        print LINE
+        if not self.sceneRect().contains(event.scenePos()):
+            return
+        elif self.mode_ == LINE:
+            ## TODO
+            activeItem.
+        else:
+            QGraphicsScene.mouseMoveEvent(self, event)
+
+    def insertItem(self, item):
+        self.addItem(item)

lineitem.py

@@ -0,0 +1,33 @@
+from PyQt4.QtGui import *
+from PyQt4.Qt import *
+from annotationitem import *
+
+class AnnotationGraphicsLineItem(AnnotationGraphicsItem):
+
+    def __init__(self, pos, endPoint, parent=None):
+        AnnotationGraphicsItem.__init__(self, False, parent)
+        self.setPos(pos)
+        self.endPoint_ = endPoint
+        self.setFlags(QGraphicsItem.ItemIsSelectable|QGraphicsItem.ItemIsMovable)
+        self.setPen(QColor('green'))
+
+    def resizeContents(self, rect):
+        pass
+
+    def boundingRect(self):
+        width = abs(self.endPoint_.x() - self.pos().x())
+        height = abs(self.endPoint_.y() - self.pos().y())
+        return QRectF(-10, -10, width, height)
+
+    def paint(self, painter, option, widget = None):
+        pen = self.pen()
+        if self.isSelected():
+            pen.setColor(QColor('red'))
+        painter.setPen(pen)
+        painter.drawLine(self.pos, self.endPoint_)
+
+    def itemChange(self, change, value):
+        return AnnotationGraphicsItem.itemChange(self, change, value)
+    
+
+

object_view.py

@@ -2,39 +2,63 @@
 import sys, os
 from PyQt4.QtGui import *
 from PyQt4.QtCore import *
+from annotationscene import *
 
 class MainWindow(QMainWindow):
     def __init__(self, argv, parent=None):
         QMainWindow.__init__(self, parent)
 
         vlayout = QVBoxLayout()
-        for i in range(8):
-            button = QPushButton("TestButton %d" % i)
-            button.clicked.connect(self.clickedButton)
-            vlayout.addWidget(button)
+        buttonSelect = QPushButton("Select")
+        buttonSelect.clicked.connect(self.clickedSelect)
+        vlayout.addWidget(buttonSelect)
+        buttonPoint = QPushButton("Point")
+        buttonPoint.clicked.connect(self.clickedPoint)
+        vlayout.addWidget(buttonPoint)
+        buttonLine = QPushButton("Line")
+        buttonLine.clicked.connect(self.clickedLine)
+        vlayout.addWidget(buttonLine)
+        buttonRectangle = QPushButton("Rectangle")
+        buttonRectangle.clicked.connect(self.clickedRectangle)
+        vlayout.addWidget(buttonRectangle)
+        buttonPolygon = QPushButton("Polygon")
+        buttonPolygon.clicked.connect(self.clickedPolygon)
+        vlayout.addWidget(buttonPolygon)
+
 
         hlayout = QHBoxLayout()
-        self.redlabel = QGraphicsView()
-        self.redlabel.setStyleSheet("QLabel {background-color: red}")
+        self.view_ = QGraphicsView()        
         hlayout.addLayout(vlayout)
-        hlayout.addWidget(self.redlabel, 1)
+        hlayout.addWidget(self.view_, 1)
+
+        self.scene_ = AnnotationScene(self)
+        self.view_.setScene(self.scene_)
 
         central = QWidget()
         central.setLayout(hlayout)
         self.setCentralWidget(central)
 
-    def clickedButton(self):
-        button = self.sender()
-        print button.text()
-        self.redlabel.setText(button.text())
+    def clickedSelect(self):
+        self.scene_.setMode(SELECT)
 
+    def clickedPoint(self):
+            self.scene_.setMode(POINT)
 
+    def clickedRectangle(self):
+        self.scene_.setMode(RECTANGLE)
+
+    def clickedLine(self):
+        self.scene_.setMode(LINE)
+
+    def clickedPolygon(self):
+        self.scene_.setMode(POLYGON)
 
 
 def main():
     app = QApplication(sys.argv)
 
     wnd = MainWindow(sys.argv[1:])
+    wnd.resize(800,600)
     wnd.show()
 
     return app.exec_()

pointitem.py

@@ -0,0 +1,34 @@
+from PyQt4.QtGui import *
+from PyQt4.Qt import *
+from annotationitem import *
+
+class AnnotationGraphicsPointItem(AnnotationGraphicsItem):
+    size_ = 4
+
+    def __init__(self, pos, parent=None):
+        AnnotationGraphicsItem.__init__(self, False, parent)
+        self.setPos(pos)
+        self.setFlags(QGraphicsItem.ItemIsSelectable|QGraphicsItem.ItemIsMovable)
+        self.setPen(QColor('green'))
+
+    def resizeContents(self, rect):
+        pass
+
+    def boundingRect(self):
+        return QRectF(-2*self.size_,
+                       -2*self.size_,
+                       4*self.size_,
+                       4*self.size_)
+
+    def paint(self, painter, option, widget = None):
+        pen = self.pen()
+        if self.isSelected():
+            pen.setColor(QColor('red'))
+        painter.setPen(pen)
+        painter.drawEllipse(0,0,self.size_,self.size_)
+
+    def itemChange(self, change, value):
+        return AnnotationGraphicsItem.itemChange(self, change, value)
+    
+
+