[PyQt] Newbe - QGraphicsScreen and QGraphicsView interaction problem

[stan]

Oh me, of course!  Can't see the forest for the trees. Works like a
charm; thanks very much for that valuable insight and help.  


On Wed, 2008-12-17 at 06:29 -0800, Brian Kelley wrote:
>         You are creating a new text() object and not adding it to the
>         scene so it is never drawn.  You may want to create a single
>         text item and pass it to the marker class as follows:
>         
>         from PyQt4 import *
>         from PyQt4.QtGui import*
>         from PyQt4.QtCore import *
>         import sys
>         
>         class text(QGraphicsTextItem):
>                 def __init__(self):
>                         QGraphicsTextItem.__init__(self)
>                         self.setFlag(QGraphicsItem.ItemIsFocusable)
>                         self.setFlag(QGraphicsItem.ItemIsSelectable)
>                         self.setTextInteractionFlags(Qt.TextEditable)
>                         self.setPlainText("0000")
>                         self.setZValue(3.0)
>         
>         class marker(QGraphicsItem):
>                 def __init__(self, text):
>                         QGraphicsItem.__init__(self)
>                         self.setFlag(QGraphicsItem.ItemIsFocusable)
>                         self.setFlag(QGraphicsItem.ItemIsMovable)
>                         self.text = text
>         
>                 def boundingRect(self):
>                         return QRectF(25.0,0.0,25.0,270.0)
>         
>                 def paint(self, painter, option, widget):
>                         ss = painter.drawRect(25.0,230.0,25.0,25.0)
>                         tt = painter.drawLine(37.5,0.0,37.5,270.0)
>         
>                 def mouseMoveEvent(self, mouseEvent):
>                         pt = self.mapToScene(mouseEvent.pos()).x()
>                         self.setPos(pt-37.5,0)
>                         self.update()
>         
>                 def mouseReleaseEvent(self,mouseEvent1):
>                         dbl = self.text
>                         dbl.setVisible(True)
>                         dbl.setPlainText(str(mouseEvent1.pos().y()))
>                         dbl.setFlag(QGraphicsItem.ItemIsFocusable)
>                         dbl.update()
>                         self.scene().update()
>         
>         class MainScene(QGraphicsScene):
>                 def __init__(self):
>                         QGraphicsScene.__init__(self)
>                         self.setSceneRect(0.0,0.0,480,270)
>                         t = text()
>                         item = marker(t)
>                         self.addItem(t)
>                         self.addItem(item)
>         
>         class AllItemsView(QGraphicsView):
>                 def __init__(self):
>                         QGraphicsView.__init__(self)
>                         self.setWindowTitle("Text")
>                         self.setInteractive(True)
>                         self.setEnabled(True)
>                         self.scene = MainScene()
>                         self.mainScene = MainScene()
>                         self.setScene(self.mainScene)
>         
>         if __name__=="__main__":
>                 app = QApplication(sys.argv)
>                 view = AllItemsView()
>                 view.show()
>                 sys.exit(app.exec_())