class MainWindow(QMainWindow):
def __init__(self):
super(MainWindow, self).__init__()
self.scene = QGraphicsScene()
# Scene is the parent of the view in order to show the graphical items.
# the View must also be the parent of the scene in order to avoid
# bizarre segmentation faults with GTK
self.view = InteractiveView(self.scene)
self.scene.setParent(self.view)
self.setCentralWidget(self.view)
self.view.setSceneRect(INT_MIN/2, INT_MIN/2, INT_MAX, INT_MAX)
self.view.centerOn(0, 0)
self.visualizer = Visualizer(self.scene)
self.visualizer.update_processes_data()
# Set a dark background color
back_color = QColor(25, 20, 45)
self.view.setBackgroundBrush(QBrush(back_color))
def keyPressEvent(self, event):
super(MainWindow, self).keyPressEvent(event)
# Quit via escape key.
if event.key() == Qt.Key_Escape:
self.close()
if event.key() == Qt.Key_R:
self.visualizer.showRootTasks = not self.visualizer.showRootTasks
