BUG: PyQt5 embedding with HiDPI not working
Using VTK 9.0.1 on macOS and adapting the EmbedPyQt example to PyQt5:
import sys
import vtk
from PyQt5.QtWidgets import QApplication
from PyQt5.QtWidgets import QMainWindow, QFrame, QVBoxLayout
from vtk.qt.QVTKRenderWindowInteractor import QVTKRenderWindowInteractor
class MainWindow(QMainWindow):
def __init__(self, parent=None):
super().__init__(parent)
self.frame = QFrame(self)
self.vl = QVBoxLayout()
self.frame.setLayout(self.vl)
self.vtkWidget = QVTKRenderWindowInteractor(self.frame)
self.vl.addWidget(self.vtkWidget)
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.frame.setLayout(self.vl)
self.setCentralWidget(self.frame)
self.show()
self.iren.Initialize()
def resizeEvent(self, event):
super().resizeEvent(event)
print(event.size().width(), event.size().height())
ren_win = self.vtkWidget.GetRenderWindow()
print(ren_win.GetSize())
print(self.ren.GetSize())
if __name__ == "__main__":
app = QApplication(sys.argv)
window = MainWindow()
sys.exit(app.exec_())
produces a render window that is not full HiDPI resolution (it is half what it should be), and the interactions are wrong (click-and-hold needs to be at lower-left 25%/25% instead of centered 50%/50% of the window size to be a no-op):
By contrast, the plain sphere example produces a render window at full HiDPI resolution (albeit smaller):
Any idea how to get this to render at the full resolution? Perhaps some modifications to vtk.qt.QVTKRenderWindowInteractor
?