在布局的正确位置插入VTK

Question

我试着把vtk3d场景小部件放到正确的位置pyqtgraphics.GraphicsLayout文件(). 但是，如果我没有将窗口指定为父窗口，则场景不会出现，或者如果我指定了，则场景不会适应自由区域，它只是浮动在左上角。你知道吗

我目前正在努力找到一个解决方案，把一个viewbox和vtkrender放在同一个窗口。你知道吗

我的一个尝试是将self.w（见下面这段）作为父窗口分配给渲染器，但我不知道如何告诉渲染器将自己放置在窗口的右下角，而不是浮动在左上角，这也会导致窗口中其他元素的重叠。你知道吗

创建新窗口并将此窗口指定为父窗口

self.vtkWidget = QVTKRenderWindowInteractor(self.w_3d)

使用引用窗口作为父级->；会导致渲染场景浮动和重叠

self.vtkWidget = QVTKRenderWindowInteractor(self.w)

import pyqtgraph as pg
import pyqtgraph.opengl as gl
from pyqtgraph.Qt import QtCore, QtGui, QtWidgets
from PyQt5 import Qt
from vtk.qt.QVTKRenderWindowInteractor import QVTKRenderWindowInteractor
import vtk, sys

class GUI:
    def __init__(self):
        self.init_gui() 

    def proxyWidget(self, item, width=None, height=None):
        proxy = QtGui.QGraphicsProxyWidget()
        if(height != None):
            height = item.sizeHint().height() if height==None else height
            item.setMaximumHeight(height)
        if(width!=None):
            width = item.sizeHint().width() if width==None else width
            item.setMaximumWidth(width)
        proxy.setWidget(item)
        return proxy

    def init_gui(self, win_height=800, win_width=1800):
        #self.w = self
        #self.w.scene().sigMouseClicked.connect(self.mousePressEvent) #mouseMoveEvent
        #self.w.scene().sigMouseMoved.connect(self.mouseMoveEvent)
        pg.setConfigOptions(imageAxisOrder='row-major')
        pg.setConfigOption('background', 'w')
        pg.setConfigOption('foreground', 'k')
        self.w = pg.GraphicsWindow(size=(win_width,win_height), border=True)
        self.img = pg.ImageItem()
        self.list_imgs       = QtGui.QListWidget()
        self.btn_Del_Mark    = QtGui.QPushButton('Del Mark')
        self.btn_MarkPed     = QtGui.QPushButton('Mark ped')
        self.lbl_list1       = QtGui.QLabel("List Images")
        self.lbl_list2       = QtGui.QLabel("List Markings")
        self.list_imgs       = QtGui.QListWidget()
        self.list_marks      = QtGui.QListWidget()
        self.layout = pg.GraphicsLayout()
        self.w_3d = pg.GraphicsWindow()
        self.vb = pg.ViewBox()


        self.lbl_list1.setAlignment(QtCore.Qt.AlignCenter)
        self.lbl_list2.setAlignment(QtCore.Qt.AlignCenter)
        self.vb.setAspectLocked()
        self.vb.addItem(self.img)
        self.vb.invertY(True)
        self.vtkWidget = QVTKRenderWindowInteractor(self.w_3d)
        self.w_3d.addItem(self.proxyWidget(self.vtkWidget))

        self.vtkWidget.Initialize()
        self.vtkWidget.Start()
        self.ren = vtk.vtkRenderer()
        self.vtkWidget.GetRenderWindow().AddRenderer(self.ren)
        self.iren = self.vtkWidget.GetRenderWindow().GetInteractor()

        # Create source
        source = vtk.vtkSphereSource()
        source.SetCenter(0, 0, 0)
        source.SetRadius(5.0)

        # Create a mapper
        mapper = vtk.vtkPolyDataMapper()
        mapper.SetInputConnection(source.GetOutputPort())

        # Create an actor
        actor = vtk.vtkActor()
        actor.SetMapper(mapper)

        self.ren.AddActor(actor)

        self.ren.ResetCamera()
        self.iren.Initialize()
        self.iren.Start()
        self.vtkWidget.show()

        self.layout.addItem(self.vb                             , 1,  3, 20,  20)
        self.layout.addItem(self.proxyWidget(self.lbl_list1     , width=(int(1./10.*win_width)), height=(int(0.9/20.*win_height))),  0,1,1,1)   
        self.layout.addItem(self.proxyWidget(self.lbl_list2     , width=(int(1./10.*win_width)), height=(int(0.9/20.*win_height))),  0,2,1,1)  
        self.layout.addItem(self.proxyWidget(self.list_imgs     , width=(int(1./10.*win_width))),  1,1,20,1)   
        self.layout.addItem(self.proxyWidget(self.list_marks    , width=(int(1./10.*win_width))),  1,2,20,1)   

        self.w.addItem(self.layout)

if __name__ == "__main__":
    app = QtGui.QApplication([])
    guiobj = GUI()

    if (sys.flags.interactive != 1) or not hasattr(QtCore, 'PYQT_VERSION'):
        QtGui.QApplication.instance().exec_()

编辑：

目前，我已经解决了它有两个窗口-经过几天的失败尝试。但即使这样看起来也很糟糕-因为渲染的场景在窗口中浮动，而对窗口大小调整事件没有反应。。。你知道吗

我想把这两扇窗户合二为一：

一次失败的尝试如下所示-但是pyqt在没有在窗口中显示渲染器场景的情况下获取布局中的空间。。。-只是空位：

self.vtkWidget = QVTKRenderWindowInteractor() #No Parent
#...see rest of code in the section above with exception of the following 2 lines
self.layout.addItem(self.proxyWidget(self.vtkWidget), 10, 3, 10, 20)
self.vtkWidget.show()

Answer 1

我能够解决这个问题-我用QGridlayout替换了QGraphicsLayout，删除了所有proxywidget包装器，并且找到了一个通过使用plotwidget添加viewbox的解决方法。你知道吗

我现在只需要移除轴-但这是次要的

import pyqtgraph as pg
import pyqtgraph.opengl as gl
from pyqtgraph.Qt import QtCore, QtGui, QtWidgets
from PyQt5 import Qt
from vtk.qt.QVTKRenderWindowInteractor import QVTKRenderWindowInteractor
import vtk, sys
import numpy as np
from PIL import Image
class GUI:
    def __init__(self):
        self.init_gui() 

    def proxyWidget(self, item, width=None, height=None):
        proxy = QtGui.QGraphicsProxyWidget()
        if(height != None):
            height = item.sizeHint().height() if height==None else height
            item.setMaximumHeight(height)
        if(width!=None):
            width = item.sizeHint().width() if width==None else width
            item.setMaximumWidth(width)
        proxy.setWidget(item)
        return proxy

    def init_gui(self, win_height=800, win_width=1800):
        pg.setConfigOptions(imageAxisOrder='row-major')
        pg.setConfigOption('background', 'w')
        pg.setConfigOption('foreground', 'k')
        self.w = pg.GraphicsWindow(size=(win_width,win_height), border=True)
        self.img = pg.ImageItem()
        self.list_imgs       = QtGui.QListWidget()
        self.btn_Del_Mark    = QtGui.QPushButton('Del Mark')
        self.btn_MarkPed     = QtGui.QPushButton('Mark ped')
        self.lbl_list1       = QtGui.QLabel("List Images")
        self.lbl_list2       = QtGui.QLabel("List Markings")
        self.list_imgs       = QtGui.QListWidget()
        self.list_marks      = QtGui.QListWidget()
        self.layout = QtGui.QGridLayout()
        self.w.setLayout(self.layout)
        #self.w_3d = pg.GraphicsWindow()

        self.vtkWidget = QVTKRenderWindowInteractor()
        #self.w_3d.addItem(self.proxyWidget(self.vtkWidget))

        self.vtkWidget.Initialize()
        self.vtkWidget.Start()
        self.ren = vtk.vtkRenderer()
        self.vtkWidget.GetRenderWindow().AddRenderer(self.ren)
        self.iren = self.vtkWidget.GetRenderWindow().GetInteractor()

        # Create source
        source = vtk.vtkSphereSource()
        source.SetCenter(0, 0, 0)
        source.SetRadius(5.0)

        # Create a mapper
        mapper = vtk.vtkPolyDataMapper()
        mapper.SetInputConnection(source.GetOutputPort())

        # Create an actor
        actor = vtk.vtkActor()
        actor.SetMapper(mapper)

        self.ren.AddActor(actor)

        self.ren.ResetCamera()
        self.iren.Initialize()
        self.iren.Start()
        path = "/home/brain/uni/frustum-pointnets/dataset/KITTI/object/testing/image_2/000000.png"
        imgdata = Image.open(path)
        self.imgArr = np.array(imgdata)
        #ToDo: undistort Image if neccessary

        self.img.setImage(self.imgArr)
        #self.vbLayout = self.w.addLayout(row=0,  col=3, rowspan=10,  colspan=20)
        imageGraph = pg.PlotWidget(name='Signalgraph')
        self.vb = imageGraph.plotItem.vb
        self.lbl_list1.setAlignment(QtCore.Qt.AlignCenter)
        self.lbl_list2.setAlignment(QtCore.Qt.AlignCenter)
        self.vb.setAspectLocked()
        self.vb.addItem(self.img)
        self.vb.invertY(True)
        self.vb.setMaximumSize(int(7/10.*win_width), int(9/20.*win_height))
        self.layout.addWidget(imageGraph,                           1 , 3, 10,  20)
        self.layout.addWidget(self.vtkWidget                      , 11, 3, 10,  20)
        self.layout.addWidget(self.lbl_list1 ,                                  0, 1, 1, 1)   
        self.layout.addWidget(self.lbl_list2 ,                                  0, 2, 1, 1)  
        self.layout.addWidget(self.list_imgs ,                                  1, 1, 20,1)   
        self.layout.addWidget(self.list_marks,                                  1, 2, 20,1)   
        sizeHint =  lambda: pg.QtCore.QSize(int(1./10.*win_width), int(0.9/20.*win_height))
        self.lbl_list1.sizeHint = lambda: pg.QtCore.QSize(int(1./10.*win_width), int(0.9/20.*win_height))
        self.lbl_list2.sizeHint = lambda: pg.QtCore.QSize(int(1./10.*win_width), int(0.9/20.*win_height))
        self.list_imgs.sizeHint  = lambda: pg.QtCore.QSize(int(1./10.*win_width), int(18/20.*win_height))
        self.list_marks.sizeHint = lambda: pg.QtCore.QSize(int(1./10.*win_width), int(18/20.*win_height))
        self.list_imgs.setMaximumWidth(int(1./10.*win_width))
        self.list_marks.setMaximumWidth(int(1./10.*win_width))

        self.vtkWidget.show()


if __name__ == "__main__":
    app = QtGui.QApplication([])
    guiobj = GUI()

    if (sys.flags.interactive != 1) or not hasattr(QtCore, 'PYQT_VERSION'):
        QtGui.QApplication.instance().exec_()