PyQt/PySide How to access/move QGraphicsItem after having added it to QGraphicsScene
pyside, python-3.x, qgraphicsitem, qgraphicsscene, qgraphicsview
Solution
The problem is that you need to set the size of your scene and then set positions of the items, check this example:
from PyQt4 import QtGui as gui
app = gui.QApplication([])
pm = gui.QPixmap("icon.png")
scene = gui.QGraphicsScene()
scene.setSceneRect(0, 0, 200, 100) #set the size of the scene
view = gui.QGraphicsView()
view.setScene(scene)
item1 = scene.addPixmap(pm) #you get a reference of the item just added
item1.setPos(0,100-item1.boundingRect().height()) #now sets the position
view.show()
app.exec_()
Problem
This might be a very uninformed question. I've been trying to figure out `QGraphics*`, and have run into a problem when trying to move an item (a pixmap) relative to or inside of the `QGraphicsView`. ``` class MainWindow(QMainWindow,myProgram.Ui_MainWindow): def __init__(self): super().__init__() self.setupUi(self) self.scene = QGraphicsScene() self.graphicsView.setScene(self.scene) pic = QPixmap('myPic.png') self.scene.addPixmap(pic) print(self.scene.items()) ``` This is the relevant part of the program with an arbitrary PNG My goal, for example, would be to move the trash-can to the left-most part of the `QGraphicsView`. I tried appending this to the code above: ``` pics = self.scene.items() for i in pics: i.setPos(100,100) ``` However, it doesn't make a difference, and even if it did, it would be awkward to have to search for it with a "for in". So my questions are: How do I access a `QPixmap` item once I have added it to a `QGraphicsView` via a `QGraphicsScene`. (I believe The `QPixmap` is at this point a `QGraphicsItem`, or more precisely a `QGraphicsPixmapItem`.) Once accessed, how do I move it, or change any of its other attributes. Would be very grateful for help, or if anyone has any good links to tutorials relevant to the question. :)