VTK 交互器和 PyQt 运行 并行
VTK interactor and PyQt running parallel
我需要获得一个 vtkChartParallelCoordinates 和其他使用 vtkContextView 的图表 运行ning 与 PyQt 应用程序并行。问题是它们都使用无限循环进行用户鼠标交互，我一次只能 运行 其中一个。当我通过 view.GetInteractor().Start() 启动 vtk 交互器时，PyQt 应用程序不会显示，直到我关闭 vtk window。
我想我有两种选择：
- 在 PyQt 的循环中手动处理 vtk 对象的用户交互
- 在 PyQt 应用程序中渲染 vtk 图
关于第二个选项：我无法使用 QVTKRenderWindowInteractor，它似乎无法与 vtkContextView 图形一起使用。我找到了 Kitware 的文档：
http://www.na-mic.org/Wiki/images/1/18/NA-MIC-VTK-Charts-2011.pdf
在第 22 页他们使用 QVTKWidget 但我的 vtk 编译没有它。
我已经尝试对选项 1 做一些事情但没有成功，没有可用的相关示例。
在我下面的代码中，当我注释掉 "view.GetInteractor().Start()" 时，PyQt window 出现并且是交互式的。
我在 linux.python 上使用 python 版本 2.7.11，vtk 版本 7.0.0
我将不胜感激！
from PyQt4 import QtCore, QtGui
import vtk
import math
class Ui_widgetParallel(object):
def setupUi(self, widgetParallel):
widgetParallel.setObjectName("widgetParallel")
widgetParallel.resize(802, 651)
#button
self.button = QtGui.QPushButton(widgetParallel)
self.button.setGeometry(QtCore.QRect(180, 100, 75, 23))
self.button.setText("Click on me")
QtCore.QMetaObject.connectSlotsByName(widgetParallel)
self.button.clicked.connect(self.testClick)
def testClick(self):
print('I was clicked on')
def selectionCallback(caller, event):
#executes when new data is selected by the user
#prints row numbers of all selected data rows
annSel = annotationLink.GetCurrentSelection()
if annSel.GetNumberOfNodes() > 0:
idxArr = annSel.GetNode(0).GetSelectionList()
if idxArr.GetNumberOfTuples() > 0:
for ii in range(idxArr.GetNumberOfTuples()):
print(idxArr.GetValue(ii))
if __name__ == "__main__":
import sys
############################
# CREATE A DATA TABLE
############################
arrX = vtk.vtkFloatArray()
arrX.SetName("XAxis")
arrC = vtk.vtkFloatArray()
arrC.SetName("Cosine")
arrS = vtk.vtkFloatArray()
arrS.SetName("Sine")
arrS2 = vtk.vtkFloatArray()
arrS2.SetName("Tan")
numPoints = 20
inc = 0.2 / (numPoints-1)
for i in range(numPoints):
arrX.InsertNextValue(i * inc)
arrC.InsertNextValue(math.cos(i * inc) + 0.0)
arrS.InsertNextValue(math.sin(i * inc) + 0.0)
arrS2.InsertNextValue(math.tan(i * inc) + 0.5)
table = vtk.vtkTable()
table.AddColumn(arrX)
table.AddColumn(arrC)
table.AddColumn(arrS)
table.AddColumn(arrS2)
############################
# STARTS THE QtGui application
############################
app = QtGui.QApplication(sys.argv)
widgetParallel = QtGui.QWidget()
ui = Ui_widgetParallel()
ui.setupUi(widgetParallel)
widgetParallel.show()
############################
# PARALLEL COORDINATES VIEW AND ANNOTATION
############################
#render contextView and parallel coordinates view
view = vtk.vtkContextView()
view.GetRenderer().SetBackground(1.0, 1.0, 1.0)
view.GetRenderWindow().SetSize(600,300)
chart = vtk.vtkChartParallelCoordinates()
view.GetScene().AddItem(chart)
# Create a annotation link to access selection in parallel coordinates view
annotationLink = vtk.vtkAnnotationLink()
annotationLink.GetCurrentSelection().GetNode(0).SetFieldType(1) # Point
annotationLink.GetCurrentSelection().GetNode(0).SetContentType(4) # 1 = GlobalIds, 2 = PedigreeIds, 4 = Indices
chart.SetAnnotationLink(annotationLink)
annotationLink.AddObserver("AnnotationChangedEvent", selectionCallback)
#link input data and refresh attributes view
chart.GetPlot(0).SetInputData(table)
chart.GetPlot(0).SetScalarVisibility(1)
chart.GetPlot(0).SetScalarVisibility(1)
chart.GetPlot(0).SetWidth(5)
chart.GetPlot(0).SetOpacity(0)
#render view
view.ResetCamera()
view.GetRenderWindow().SetMultiSamples(0)
view.Render()
view.GetInteractor().Start()
############################
# EXITS THE APPLICATION WHEN GUI LOOP IS CLOSED
############################
sys.exit(app.exec_())
我不确定我是否完全理解了你的第一个问题。但是，我附加了一个 python 原型来在 Qt main window 中使用 QVTKRenderWindowInteractor class 显示您的 vtk 图。至于第一个问题，我认为通过附带的方法，您可以轻松地将 pyQt 事件与 vtk 事件联系起来。
from PyQt4 import QtCore, QtGui
from vtk.qt4.QVTKRenderWindowInteractor import QVTKRenderWindowInteractor
import vtk
import math
import sys
class test(QtGui.QMainWindow):
def __init__(self, parent=None):
QtGui.QMainWindow.__init__(self, parent)
self._initUI()
def _initUI(self):
self.setWindowTitle(self.tr("PyQt4 widgetParallel"))
self.workspace = QtGui.QWorkspace()
self.setCentralWidget(self.workspace)
self.frame1 = QtGui.QFrame(self.workspace)
self.hbox1 = QtGui.QHBoxLayout()
self.frame2 = QtGui.QFrame(self.workspace)
self.frame1.resize(600, 600)
self.frame2.resize(600, 600)
self.frame2.move(QtCore.QPoint(600, 0))
self.hbox2 = QtGui.QHBoxLayout()
self.widgetParallel = Ui_widgetParallel(self.frame2)
self.widget = QVTKRenderWindowInteractor(self.frame1)
self.iren = self.widget.GetRenderWindow().GetInteractor()
self.arrX = vtk.vtkFloatArray()
self.arrX.SetName("XAxis")
self.arrC = vtk.vtkFloatArray()
self.arrC.SetName("Cosine")
self.arrS = vtk.vtkFloatArray()
self.arrS.SetName("Sine")
self.arrS2 = vtk.vtkFloatArray()
self.arrS2.SetName("Tan")
numPoints = 20
inc = 0.2 / (numPoints-1)
for i in range(numPoints):
self.arrX.InsertNextValue(i * inc)
self.arrC.InsertNextValue(math.cos(i * inc) + 0.0)
self.arrS.InsertNextValue(math.sin(i * inc) + 0.0)
self.arrS2.InsertNextValue(math.tan(i * inc) + 0.5)
self.table = vtk.vtkTable()
self.table.AddColumn(self.arrX)
self.table.AddColumn(self.arrC)
self.table.AddColumn(self.arrS)
self.table.AddColumn(self.arrS2)
self.view = vtk.vtkContextView()
self.view.SetInteractor(self.iren)
self.widget.SetRenderWindow(self.view.GetRenderWindow())
self.ren = self.view.GetRenderer()
self.ren.SetBackground(1.0, 1.0, 1.0)
self.renWin = self.widget.GetRenderWindow()
self.iren.SetRenderWindow(self.widget.GetRenderWindow())
self.chart = vtk.vtkChartParallelCoordinates()
self.view.GetScene().AddItem(self.chart)
# Create a annotation link to access selection in parallel coordinates
# view
self.annotationLink = vtk.vtkAnnotationLink()
# Point
self.annotationLink.GetCurrentSelection().GetNode(0).SetFieldType(1)
# 1 = GlobalIds, 2 = PedigreeIds, 4 = Indices
self.annotationLink.GetCurrentSelection().GetNode(0).SetContentType(4)
self.chart.SetAnnotationLink(self.annotationLink)
self.annotationLink.RemoveObservers("AnnotationChangedEvent")
self.annotationLink.AddObserver("AnnotationChangedEvent",
self.selectionCallback)
# link input data and refresh attributes view
self.chart.GetPlot(0).SetInputData(self.table)
self.chart.GetPlot(0).SetScalarVisibility(1)
self.chart.GetPlot(0).SetScalarVisibility(1)
self.chart.GetPlot(0).SetWidth(5)
self.chart.GetPlot(0).SetOpacity(0)
self.renWin.AddRenderer(self.ren)
self.renWin.SetMultiSamples(0)
self.hbox1.addWidget(self.widget)
self.hbox2.addWidget(self.widgetParallel)
self.frame1.setLayout(self.hbox1)
self.frame2.setLayout(self.hbox2)
self.workspace.addWindow(self.frame1)
self.workspace.addWindow(self.frame2)
self.widget.show()
# self.widgetParallel.show()
self.iren.Initialize()
def selectionCallback(self, caller, event):
# executes when new data is selected by the user
# prints row numbers of all selected data rows
annSel = self.annotationLink.GetCurrentSelection()
if annSel.GetNumberOfNodes() > 0:
idxArr = annSel.GetNode(0).GetSelectionList()
if idxArr.GetNumberOfTuples() > 0:
for ii in range(idxArr.GetNumberOfTuples()):
print(idxArr.GetValue(ii))
class Ui_widgetParallel(QtGui.QWidget):
def __init__(self, parent):
super(Ui_widgetParallel, self).__init__(parent)
self._setupUi()
def _setupUi(self):
self.setObjectName("widgetParallel")
self.resize(802, 651)
# button
self.button = QtGui.QPushButton(self)
self.button.setGeometry(QtCore.QRect(180, 100, 75, 23))
self.button.setText("Click on me")
layout = QtGui.QHBoxLayout()
layout.addWidget(self.button)
self.setLayout(layout)
# QtCore.QMetaObject.connectSlotsByName(self)
self.button.clicked.connect(self.testClick)
self.show()
def testClick(self):
print('I was clicked on')
if __name__ == "__main__":
app = QtGui.QApplication(sys.argv)
mainwindow = test()
mainwindow.show()
sys.exit(app.exec_())
p.s。除了 QWidgets，您还可以使用 QDockWidgets。
我需要获得一个 vtkChartParallelCoordinates 和其他使用 vtkContextView 的图表 运行ning 与 PyQt 应用程序并行。问题是它们都使用无限循环进行用户鼠标交互，我一次只能 运行 其中一个。当我通过 view.GetInteractor().Start() 启动 vtk 交互器时，PyQt 应用程序不会显示，直到我关闭 vtk window。 我想我有两种选择：
- 在 PyQt 的循环中手动处理 vtk 对象的用户交互
- 在 PyQt 应用程序中渲染 vtk 图
关于第二个选项：我无法使用 QVTKRenderWindowInteractor，它似乎无法与 vtkContextView 图形一起使用。我找到了 Kitware 的文档： http://www.na-mic.org/Wiki/images/1/18/NA-MIC-VTK-Charts-2011.pdf 在第 22 页他们使用 QVTKWidget 但我的 vtk 编译没有它。
我已经尝试对选项 1 做一些事情但没有成功，没有可用的相关示例。
在我下面的代码中，当我注释掉 "view.GetInteractor().Start()" 时，PyQt window 出现并且是交互式的。
我在 linux.python 上使用 python 版本 2.7.11，vtk 版本 7.0.0
我将不胜感激！
from PyQt4 import QtCore, QtGui
import vtk
import math
class Ui_widgetParallel(object):
def setupUi(self, widgetParallel):
widgetParallel.setObjectName("widgetParallel")
widgetParallel.resize(802, 651)
#button
self.button = QtGui.QPushButton(widgetParallel)
self.button.setGeometry(QtCore.QRect(180, 100, 75, 23))
self.button.setText("Click on me")
QtCore.QMetaObject.connectSlotsByName(widgetParallel)
self.button.clicked.connect(self.testClick)
def testClick(self):
print('I was clicked on')
def selectionCallback(caller, event):
#executes when new data is selected by the user
#prints row numbers of all selected data rows
annSel = annotationLink.GetCurrentSelection()
if annSel.GetNumberOfNodes() > 0:
idxArr = annSel.GetNode(0).GetSelectionList()
if idxArr.GetNumberOfTuples() > 0:
for ii in range(idxArr.GetNumberOfTuples()):
print(idxArr.GetValue(ii))
if __name__ == "__main__":
import sys
############################
# CREATE A DATA TABLE
############################
arrX = vtk.vtkFloatArray()
arrX.SetName("XAxis")
arrC = vtk.vtkFloatArray()
arrC.SetName("Cosine")
arrS = vtk.vtkFloatArray()
arrS.SetName("Sine")
arrS2 = vtk.vtkFloatArray()
arrS2.SetName("Tan")
numPoints = 20
inc = 0.2 / (numPoints-1)
for i in range(numPoints):
arrX.InsertNextValue(i * inc)
arrC.InsertNextValue(math.cos(i * inc) + 0.0)
arrS.InsertNextValue(math.sin(i * inc) + 0.0)
arrS2.InsertNextValue(math.tan(i * inc) + 0.5)
table = vtk.vtkTable()
table.AddColumn(arrX)
table.AddColumn(arrC)
table.AddColumn(arrS)
table.AddColumn(arrS2)
############################
# STARTS THE QtGui application
############################
app = QtGui.QApplication(sys.argv)
widgetParallel = QtGui.QWidget()
ui = Ui_widgetParallel()
ui.setupUi(widgetParallel)
widgetParallel.show()
############################
# PARALLEL COORDINATES VIEW AND ANNOTATION
############################
#render contextView and parallel coordinates view
view = vtk.vtkContextView()
view.GetRenderer().SetBackground(1.0, 1.0, 1.0)
view.GetRenderWindow().SetSize(600,300)
chart = vtk.vtkChartParallelCoordinates()
view.GetScene().AddItem(chart)
# Create a annotation link to access selection in parallel coordinates view
annotationLink = vtk.vtkAnnotationLink()
annotationLink.GetCurrentSelection().GetNode(0).SetFieldType(1) # Point
annotationLink.GetCurrentSelection().GetNode(0).SetContentType(4) # 1 = GlobalIds, 2 = PedigreeIds, 4 = Indices
chart.SetAnnotationLink(annotationLink)
annotationLink.AddObserver("AnnotationChangedEvent", selectionCallback)
#link input data and refresh attributes view
chart.GetPlot(0).SetInputData(table)
chart.GetPlot(0).SetScalarVisibility(1)
chart.GetPlot(0).SetScalarVisibility(1)
chart.GetPlot(0).SetWidth(5)
chart.GetPlot(0).SetOpacity(0)
#render view
view.ResetCamera()
view.GetRenderWindow().SetMultiSamples(0)
view.Render()
view.GetInteractor().Start()
############################
# EXITS THE APPLICATION WHEN GUI LOOP IS CLOSED
############################
sys.exit(app.exec_())
我不确定我是否完全理解了你的第一个问题。但是，我附加了一个 python 原型来在 Qt main window 中使用 QVTKRenderWindowInteractor class 显示您的 vtk 图。至于第一个问题，我认为通过附带的方法，您可以轻松地将 pyQt 事件与 vtk 事件联系起来。
from PyQt4 import QtCore, QtGui
from vtk.qt4.QVTKRenderWindowInteractor import QVTKRenderWindowInteractor
import vtk
import math
import sys
class test(QtGui.QMainWindow):
def __init__(self, parent=None):
QtGui.QMainWindow.__init__(self, parent)
self._initUI()
def _initUI(self):
self.setWindowTitle(self.tr("PyQt4 widgetParallel"))
self.workspace = QtGui.QWorkspace()
self.setCentralWidget(self.workspace)
self.frame1 = QtGui.QFrame(self.workspace)
self.hbox1 = QtGui.QHBoxLayout()
self.frame2 = QtGui.QFrame(self.workspace)
self.frame1.resize(600, 600)
self.frame2.resize(600, 600)
self.frame2.move(QtCore.QPoint(600, 0))
self.hbox2 = QtGui.QHBoxLayout()
self.widgetParallel = Ui_widgetParallel(self.frame2)
self.widget = QVTKRenderWindowInteractor(self.frame1)
self.iren = self.widget.GetRenderWindow().GetInteractor()
self.arrX = vtk.vtkFloatArray()
self.arrX.SetName("XAxis")
self.arrC = vtk.vtkFloatArray()
self.arrC.SetName("Cosine")
self.arrS = vtk.vtkFloatArray()
self.arrS.SetName("Sine")
self.arrS2 = vtk.vtkFloatArray()
self.arrS2.SetName("Tan")
numPoints = 20
inc = 0.2 / (numPoints-1)
for i in range(numPoints):
self.arrX.InsertNextValue(i * inc)
self.arrC.InsertNextValue(math.cos(i * inc) + 0.0)
self.arrS.InsertNextValue(math.sin(i * inc) + 0.0)
self.arrS2.InsertNextValue(math.tan(i * inc) + 0.5)
self.table = vtk.vtkTable()
self.table.AddColumn(self.arrX)
self.table.AddColumn(self.arrC)
self.table.AddColumn(self.arrS)
self.table.AddColumn(self.arrS2)
self.view = vtk.vtkContextView()
self.view.SetInteractor(self.iren)
self.widget.SetRenderWindow(self.view.GetRenderWindow())
self.ren = self.view.GetRenderer()
self.ren.SetBackground(1.0, 1.0, 1.0)
self.renWin = self.widget.GetRenderWindow()
self.iren.SetRenderWindow(self.widget.GetRenderWindow())
self.chart = vtk.vtkChartParallelCoordinates()
self.view.GetScene().AddItem(self.chart)
# Create a annotation link to access selection in parallel coordinates
# view
self.annotationLink = vtk.vtkAnnotationLink()
# Point
self.annotationLink.GetCurrentSelection().GetNode(0).SetFieldType(1)
# 1 = GlobalIds, 2 = PedigreeIds, 4 = Indices
self.annotationLink.GetCurrentSelection().GetNode(0).SetContentType(4)
self.chart.SetAnnotationLink(self.annotationLink)
self.annotationLink.RemoveObservers("AnnotationChangedEvent")
self.annotationLink.AddObserver("AnnotationChangedEvent",
self.selectionCallback)
# link input data and refresh attributes view
self.chart.GetPlot(0).SetInputData(self.table)
self.chart.GetPlot(0).SetScalarVisibility(1)
self.chart.GetPlot(0).SetScalarVisibility(1)
self.chart.GetPlot(0).SetWidth(5)
self.chart.GetPlot(0).SetOpacity(0)
self.renWin.AddRenderer(self.ren)
self.renWin.SetMultiSamples(0)
self.hbox1.addWidget(self.widget)
self.hbox2.addWidget(self.widgetParallel)
self.frame1.setLayout(self.hbox1)
self.frame2.setLayout(self.hbox2)
self.workspace.addWindow(self.frame1)
self.workspace.addWindow(self.frame2)
self.widget.show()
# self.widgetParallel.show()
self.iren.Initialize()
def selectionCallback(self, caller, event):
# executes when new data is selected by the user
# prints row numbers of all selected data rows
annSel = self.annotationLink.GetCurrentSelection()
if annSel.GetNumberOfNodes() > 0:
idxArr = annSel.GetNode(0).GetSelectionList()
if idxArr.GetNumberOfTuples() > 0:
for ii in range(idxArr.GetNumberOfTuples()):
print(idxArr.GetValue(ii))
class Ui_widgetParallel(QtGui.QWidget):
def __init__(self, parent):
super(Ui_widgetParallel, self).__init__(parent)
self._setupUi()
def _setupUi(self):
self.setObjectName("widgetParallel")
self.resize(802, 651)
# button
self.button = QtGui.QPushButton(self)
self.button.setGeometry(QtCore.QRect(180, 100, 75, 23))
self.button.setText("Click on me")
layout = QtGui.QHBoxLayout()
layout.addWidget(self.button)
self.setLayout(layout)
# QtCore.QMetaObject.connectSlotsByName(self)
self.button.clicked.connect(self.testClick)
self.show()
def testClick(self):
print('I was clicked on')
if __name__ == "__main__":
app = QtGui.QApplication(sys.argv)
mainwindow = test()
mainwindow.show()
sys.exit(app.exec_())
p.s。除了 QWidgets，您还可以使用 QDockWidgets。