<div dir="ltr"><p style="font-size:12.8px">So I rewrote what you suggested but I'm still not being able to detect the hover event...why is this working?</p><p style="font-size:12.8px"><span class="im"><b>class graphics</b><b>_Object</b>(QtGui.QGraphicsPixmapItem):<br>    <b>def </b>__init__(self, parent=None):<br></span>        super(graphics_Object, self).__init__(parent)<br>        pixmap = QtGui.QPixmap("switch.png").scaled(40, 40, QtCore.Qt.KeepAspectRatio)<br>        self.setPixmap(pixmap)<br>        self.setFlag(QtGui.QGraphicsPixmapItem.ItemIsSelectable)<br>        self.setFlag(QtGui.QGraphicsPixmapItem.ItemIsMovable)<br>        self.setAcceptHoverEvents(True)<br>        self.switch_LinkedWithItems = []<br>        self.switch_mininet_name = ''<br><br>    <b>def </b><b>hoverEnterEvent</b>(self, event):<br>        <b>print </b>'hello'<br><br>    <b>def </b><b>hoverLeaveEvent</b>(self, event):<br>        <b>print </b>'goodbye'</p><p style="font-size:12.8px"></p><p style="font-size:12.8px"><span class="im"><b>class </b><b>graphicsScene</b>(QtGui.QGraphicsScene):<br>    <b>def </b>__init__(self, parent=None):<br>        super(graphicsScene, self).__init__(parent)<br><br>    <b>def </b><b>mousePressEvent</b>(self, event):<br>        self.graphics_item = graphics_Object()<br><br>    <b>def </b><b>mouseReleaseEvent</b>(self, event)<br></span>        self.addItem(self.graphics_item.graphics_pixItem)<br>        self.graphics_item.setPos(event.scenePos())<span class="im"><br><br><br><b>class </b><b>Form</b>(QtGui.QMainWindow):<br>    <b>def </b>__init__(self):<br>        super(Form, self).__init__()<br>        self.ui = uic.loadUi('form.ui')<br><br>        self.scene = graphicsScene()<br></span>        self.setMouseTracking(True)<br></p><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Sun, May 8, 2016 at 4:38 PM, Nesibe Yavuz <span dir="ltr"><<a href="/user/SendEmail.jtp?type=node&node=5190333&i=0" target="_top" rel="nofollow" link="external">[hidden email]</a>></span> wrote:<br><blockquote style='border-left:2px solid #CCCCCC;padding:0 1em' class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">By the way I'm not posting the entire code so sometimes I might forget to change the name of a variable or class but in my original code the format is written correctly.</div><div class="HOEnZb"><div class="h5"><div class="gmail_extra"><br><div class="gmail_quote">On Sun, May 8, 2016 at 4:34 PM, Nesibe Yavuz <span dir="ltr"><<a href="/user/SendEmail.jtp?type=node&node=5190333&i=1" target="_top" rel="nofollow" link="external">[hidden email]</a>></span> wrote:<br><blockquote style='border-left:2px solid #CCCCCC;padding:0 1em' class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">

<p><span>

</span></p><p>So I rewrote what you suggested but I'm still not being able to detect the hover event...why is this working?</p><p><span><span><b>class graphics</b></span><b>_Object</b>(QtGui.QGraphicsPixmapItem):<br>

    <span><b>def </b></span><span>__init__</span>(<span>self</span><span>, </span>parent=<span>None</span>):<br></span>

        <span>super</span>(graphics_Object<span>, </span><span>self</span>).<span>__init__</span>(parent)<br>

        pixmap = QtGui.QPixmap(<span>"switch.png"</span>).scaled(<span>40</span><span>, </span><span>40</span><span>, </span>QtCore.Qt.KeepAspectRatio)<br>

        <span>self</span>.setPixmap(pixmap)<br>

        <span>self</span>.setFlag(QtGui.QGraphicsPixmapItem.ItemIsSelectable)<br>

        <span>self</span>.setFlag(QtGui.QGraphicsPixmapItem.ItemIsMovable)<br>

        <span>self</span>.setAcceptHoverEvents(<span>True</span>)<br>

        <span>self</span>.switch_LinkedWithItems = []<br>

        <span>self</span>.switch_mininet_name = <span>''<br>

<br>

    </span><span><b>def </b></span><b>hoverEnterEvent</b>(<span>self</span><span>, </span>event):<br>

        <span><b>print </b></span><span>'hello'<br>

<br>

    </span><span><b>def </b></span><b>hoverLeaveEvent</b>(<span>self</span><span>, </span>event):<br>

        <span><b>print </b></span><span>'goodbye'</span></p><p><span>

</span></p><p><span><span><b>class </b></span><b>graphicsScene</b>(QtGui.QGraphicsScene):<br>

    <span><b>def </b></span><span>__init__</span>(<span>self</span><span>, </span>parent=<span>None</span>):<br>

        <span>super</span>(graphicsScene<span>, </span><span>self</span>).<span>__init__</span>(parent)<br>

<br>

    <span><b>def </b></span><b>mousePressEvent</b>(<span>self</span><span>, </span>event):<br>

        <span>self</span>.graphics_item = graphics_Object()<br>

<br>

    <span><b>def </b></span><b>mouseReleaseEvent</b>(<span>self</span><span>, </span>event)<br></span>

        <span>self</span>.addItem(<span>self</span>.graphics_item.graphics_pixItem)<br>

        <span>self</span>.graphics_item.setPos(event.scenePos())<span><br>

<br>

<br>

<span><b>class </b></span><b>Form</b>(QtGui.QMainWindow):<br>

    <span><b>def </b></span><span>__init__</span>(<span>self</span>):<br>

        <span>super</span>(Form<span>, </span><span>self</span>).<span>__init__</span>()<br>

        <span>self</span>.ui = uic.loadUi(<span>'form.ui'</span>)<br>

<br>

        <span>self</span>.scene = graphicsScene()<br></span>

        <span>self</span>.setMouseTracking(<span>True</span>)<br>

</p><p><br></p><p><br></p></div><div class="gmail_extra"><br><div class="gmail_quote">On Sun, May 8, 2016 at 1:54 PM, Elvis Stansvik [via Python] <span dir="ltr"><<a href="/user/SendEmail.jtp?type=node&node=5190333&i=2" target="_top" rel="nofollow" link="external">[hidden email]</a>></span> wrote:<br><blockquote style='border-left:2px solid #CCCCCC;padding:0 1em' class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div><span>

        2016-05-07 23:05 GMT+02:00 sw33tz <<a href="http:///user/SendEmail.jtp?type=node&node=5190318&i=0" rel="nofollow" link="external" target="_blank">[hidden email]</a>>:

<br>> Thanks for replying...I've updated my code but I still cant get it to work:

<br><br></span><span>I've now had a closer look at your code. There are several problems

with which I point out inline below.

<br><br>>

<br></span><span>> class graphics_Object(QtGui.QGraphicsPixmapItem):

<br>>     def __init__(self, parent=None):

<br>>         super(switch_Object, self).__init__(parent)

<br><br></span><span>This, as I already mentioned, should be graphics_Object and not

graphics_Object in the call to super(..).

<br></span><span><div><div class='shrinkable-quote'><br>>         pixmap = QtGui.QPixmap("item.png")

<br>>         self.graphics_pixItem = QtGui.QGraphicsPixmapItem(pixmap.scaled(40,

<br>> 40, QtCore.Qt.KeepAspectRatio))

<br>>

<br>> self.graphics_pixItem.setFlag(QtGui.QGraphicsPixmapItem.ItemIsSelectable)

<br>>

<br>> self.graphics_pixItem.setFlag(QtGui.QGraphicsPixmapItem.ItemIsMovable)

<br>>         self.graphics_pixItem.setAcceptHoverEvents(True)

<br>>

<br>>

<br>>     def hoverEnterEvent(self, event):

<br>>         print 'hello'

</div></div></span><span>Here's your real problem, you are overriding hoverEnterEvent in the

<br>graphics_Object class, but the item that you are later adding to the

<br>scene is self.graphics_pixItem, which is of type

QtGui.QGraphicsPixmapItem.

<br><br>>

<br></span><span>> class graphicsScene(QtGui.QGraphicsScene):

<br>>     def __init__(self, parent=None):

<br>>         super(graphicsScene, self).__init__(parent)

<br>>

<br>>     def mousePressEvent(self, event):

<br>>         self.graphics_item = graphics_Object()

<br>>     def mouseReleaseEvent(self, event)

There's a missing ':' above.

<br><br>>         self.addItem(self.self.graphics_item.graphics_pixItem)

<br><br>Apart from "self.self" which makes no sense (it should be just

<br>"self.graphics_item"), here you are adding graphics_pixItem to the

<br>scene, which is of type QtGui.QGraphicsPixmapItem, not of type

graphics_Object.

You seem to have a misunderstanding of how inheritance vs composition works.

<br><br>>         self.graphics_item.self.graphics_pixItem.setPos(event.scenePos())

<br><br>Here's again a strange use of "self" which will give an error. `self`

<br>is only available from within the class itself, the

"self.graphics_item.self" here should be just "self.graphics_item".

<br><br>Here's roughly how I would structure the code, given what I've seen in

<br>your example (Python 2, PyQt 4, since I'm guessing that's what you

<br>use):

<br><br><br>main.py:

<br><br></span><span>from sys import argv, exit

<br><br></span><span>from PyQt4.QtGui import QApplication

<br>from PyQt4.QtGui import QGraphicsItem

<br>from PyQt4.QtGui import QGraphicsPixmapItem

<br>from PyQt4.QtGui import QGraphicsScene

<br>from PyQt4.QtGui import QMainWindow

<br>from PyQt4.QtGui import QPixmap

<br>from PyQt4.QtCore import Qt

<br>from PyQt4.uic import loadUi

<br><br><br>class Item(QGraphicsPixmapItem):

<br><br>    def __init__(self, parent=None):

<br>        super(Item, self).__init__(parent)

<br><br>        pixmap = QPixmap('item.png').scaled(40, 40, Qt.KeepAspectRatio)

<br><br>        self.setPixmap(pixmap)

<br>        self.setFlag(QGraphicsItem.ItemIsSelectable)

<br>        self.setFlag(QGraphicsItem.ItemIsMovable)

<br></span>        self.setAcceptHoverEvents(True)

<br><br>    def hoverEnterEvent(self, event):

<br><span>        print('hover enter')  # Do whatever you need to do here

<br><br></span>    def hoverLeaveEvent(self, event):

<br><span>        print('hover leave')  # Do whatever you need to do here

<br><br><br>class Scene(QGraphicsScene):

<br><br>    def __init__(self, parent=None):

<br>        super(Scene, self).__init__(parent)

<br><br>    def mouseReleaseEvent(self, event):

<br>        item = Item()

<br>        item.setPos(event.scenePos())

<br>        self.addItem(item)

<br><br><br>class Window(QMainWindow):

<br><br>    def __init__(self, parent=None):

<br>        super(Window, self).__init__(parent)

<br><br>        loadUi('window.ui'), self)

<br><br>        self.scene = Scene(self)

<br>        self.view.setScene(self.scene)

<br><br><br></span><span>app = None

<br><br><br>def main():

<br>    global app

<br><br>    app = QApplication(argv)

<br><br></span>    window = Window()

<br><span>    window.show()

<br><br>    exit(app.exec_())

<br><br><br>if __name__ == '__main__':

<br>    main()

<br><br><br></span><div><div>window.ui:

<br><br><?xml version="1.0" encoding="UTF-8"?>

<br><ui version="4.0">

<br> <class>Window</class>

<br> <widget class="QMainWindow" name="Window">

<br>  <property name="geometry">

<br>   <rect>

<br>    <x>0</x>

<br>    <y>0</y>

<br>    <width>800</width>

<br>    <height>600</height>

<br>   </rect>

<br>  </property>

<br>  <property name="windowTitle">

<br>   <string>MainWindow</string>

<br>  </property>

<br>  <widget class="QWidget" name="centralwidget">

<br>   <layout class="QVBoxLayout" name="verticalLayout">

<br>    <item>

<br>     <widget class="QGraphicsView" name="view"/>

<br>    </item>

<br>   </layout>

<br>  </widget>

<br> </widget>

<br> <resources/>

<br> <connections/>

<br></ui>

<br><br><br>Hope you can use that as starting point / inspiration and figure out

things from there.

<br><br>Elvis

<br></div></div><div><br>>

<br><span>> class Form(QtGui.QMainWindow):

<div class='shrinkable-quote'><br>>     def __init__(self):

<br>>         super(Form, self).__init__()

<br>>         self.ui = uic.loadUi('form.ui')

<br>>

<br>>         self.scene = graphicsScene()

<br>>         self.ui.view.setScene(self.scene)

<br>>

<br>>         self.setMouseTracking(True)

<br>>

<br>>

</div></span><div><div>> On Sat, May 7, 2016 at 10:55 PM, Elvis Stansvik [via Python] <[hidden

<div class='shrinkable-quote'><br>> email]> wrote:

<br>>>

<br>>> Hi Nesibe,

<br>>>

<br>>> 2016-05-07 19:46 GMT+02:00 sw33tz <[hidden email]>:

<br>>> > I want some small text to pop up when I have my curser over a

<br>>> > QGraphicsItem

<br>>> > in my QGraphicsScene. I have a class that inherits from QGraphicsItem,

<br>>> > and

>> > this represents my graphical items in the scene.

<br>>> >

<br>>> > I tried using the QGraphicsItem.hoverEnterEvent and I also set the

<br>>> > setAcceptHoverEvents(True), but I still can't enable that hover event. I

<br>>> > also came across an event filter method but I'm not sure where to

<br>>> > implement

<br>>> > it.

<br>>>

<br>>> This seems to work here:

<br>>>

<br>>>

<br>>> test.py:

<br>>>

<br>>> from sys import argv, exit

<br>>>

<br>>> from PyQt5.QtCore import Qt

<br>>> from PyQt5.QtWidgets import QApplication

<br>>> from PyQt5.QtWidgets import QGraphicsEllipseItem

<br>>> from PyQt5.QtWidgets import QGraphicsScene

<br>>> from PyQt5.QtWidgets import QGraphicsView

<br>>> from PyQt5.QtWidgets import QMainWindow

<br>>>

<br>>>

<br>>> class MyItem(QGraphicsEllipseItem):

<br>>>

<br>>>     def __init__(self, parent=None):

<br>>>         super(MyItem, self).__init__(parent)

<br>>>

<br>>>         self.setRect(50, 50, 50, 50)

<br>>>         self.setBrush(Qt.red)

<br>>>         self.setAcceptHoverEvents(True)

<br>>>

<br>>>     def hoverEnterEvent(self, event):

<br>>>         print('hover enter')

<br>>>

<br>>>     def hoverLeaveEvent(self, event):

<br>>>         print('hover leave')

<br>>>

<br>>>

<br>>> app = None

<br>>>

<br>>>

<br>>> def main():

<br>>>     global app

<br>>>

<br>>>     app = QApplication(argv)

<br>>>

<br>>>     scene = QGraphicsScene()

<br>>>     scene.addItem(MyItem())

<br>>>

<br>>>     view = QGraphicsView()

<br>>>     view.setScene(scene)

<br>>>

<br>>>     window = QMainWindow()

<br>>>     window.setCentralWidget(view)

<br>>>     window.show()

<br>>>

<br>>>     exit(app.exec_())

<br>>>

<br>>>

<br>>> if __name__ == '__main__':

<br>>>     main()

<br>>>

<br>>>

>> Hope that helps.

<br>>>

<br>>> Best regards,

<br>>> Elvis

<br>>>

<br>>> >

<br>>> > Should I install the event filter in the QGraphicsItem class, or the

<br>>> > scene?

<br>>> > I tried both and I'm still not getting the desired result. I want to be

<br>>> > able

>> > to hover over all the items in the scene.

<br>>> >

<br>>> >

<br>>> > class HoverEventFilter(QtCore.QObject):

<br>>> >     def eventFilter(self, receiver, event):

<br>>> >         if (event.type() == QtCore.QEvent.HoverEnter):

<br>>> >             # this is for test purposes

<br>>> >             print 'hover event'

<br>>> >             return True

<br>>> >         else:

<br>>> >             # Call Base Class Method to Continue Normal Event Processing

<br>>> >             return super(HoverEventFilter, self).eventFilter(receiver,

<br>>> > event)

<br>>> >

<br>>> >

<br>>> >

<br>>> > --

<br>>> > View this message in context:

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<br>>> NAML

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