Use of GLViewWidget in standalone PyQt application

[Alex Hanson]

I am developing a PyQt app and want the center widget to be able to view STL files.

The class which defines the widget is as follows:

class GraphicsWidget(QtGui.QFrame):

   

    def __init__(self, parent):

        super(GraphicsWidget, self).__init__(parent)

        self.initWidget()

    def initWidget(self):    

        view = gl.GLViewWidget(self)

        self.setLayout(view)

and I call it in my main gui class:

class pyEC3PO(QtGui.QMainWindow):

    def __init__(self):
        super(pyEC3PO, self).__init__()
        self.initUI()

    def initUI(self):
        #Set QMainWindow properties
        self.setDockOptions(QtGui.QMainWindow.VerticalTabs)

        #Create center widget
        self.center = GraphicsWidget(self)
        self.setCentralWidget(self.center)

        #Set left docks
        self.importDock = MyDocks(self, 'Import')
        self.embedDock = MyDocks(self, 'Embed')
        self.addDockWidget(QtCore.Qt.LeftDockWidgetArea, self.importDock)
        self.tabifyDockWidget(self.importDock, self.embedDock)

        #Status bar
        self.statusBar = self.statusBar()
        self.statusBar.showMessage('Ready')
        self.importDock.msg2StatusBar[str].connect(self.statusBar.showMessage)


        self.resize(800,800)
        self.centerWindow()
        self.setWindowTitle('My GUI!')
        self.show()

        def centerWindow(self):
            screen = QtGui.QDesktopWidget().screenGeometry()
            size = self.geometry()
            self.move((screen.width()-size.width())/2,
                (screen.height()-size.height())/2)

When setlayout(view) is called in GraphicsWidget, I get the following type error:

    TypeError: QWidget.setLayout(QLayout): argument 1 has unexpected type 'GLViewWidget'

The documentation only says 2D elements can be embeded in your own applications. Does anyone know how to embed the GLViewWidget? Would Vispy be a good alternative?

Thank you,

Alex

[Mathew Schwartz]

theres an example folder in pyqtgraph that has the implementation of a 3d example.  

Luke would have more suggestions as to using vispy or not.

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[Luke Campagnola]

On Wed, Mar 5, 2014 at 6:04 PM, Alex Hanson <hanso...@gmail.com> wrote:

When setlayout(view) is called in GraphicsWidget, I get the following type error:

    TypeError: QWidget.setLayout(QLayout): argument 1 has unexpected type 'GLViewWidget'

QWidget.setLayout() expects a QLayout as its argument, bit GLViewWidget inherits from QWidget, not QLayout. You need something like:

    layout = QtGui.QGridLayout()

    self.setLayout(layout)

    layout.addWidget(view)

More information on this topic: http://qt-project.org/doc/qt-4.8/layout.html

Would Vispy be a good alternative?

Not yet, but hopefully within a few months we will start to see features similar to pyqtgraph.opengl. VisPy will also have a native Qt widget that can be embedded exactly like pg.GLViewWidget.

[Alex Hanson]

Luke,

Thank you, this worked perfectly

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