60 lines
2.0 KiB
Python
60 lines
2.0 KiB
Python
from pyqtgraph.Qt import QtGui, QtCore
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class GLGraphicsItem(QtCore.QObject):
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def __init__(self, parentItem=None):
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QtCore.QObject.__init__(self)
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self.__parent = None
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self.__view = None
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self.__children = set()
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self.setParentItem(parentItem)
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self.setDepthValue(0)
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def setParentItem(self, item):
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if self.__parent is not None:
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self.__parent.__children.remove(self)
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if item is not None:
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item.__children.add(self)
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self.__parent = item
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def parentItem(self):
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return self.__parent
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def childItems(self):
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return list(self.__children)
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def _setView(self, v):
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self.__view = v
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def view(self):
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return self.__view
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def setDepthValue(self, value):
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"""
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Sets the depth value of this item. Default is 0.
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This controls the order in which items are drawn--those with a greater depth value will be drawn later.
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Items with negative depth values are drawn before their parent.
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(This is analogous to QGraphicsItem.zValue)
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The depthValue does NOT affect the position of the item or the values it imparts to the GL depth buffer.
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'"""
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self.__depthValue = value
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def depthValue(self):
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"""Return the depth value of this item. See setDepthValue for mode information."""
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return self.__depthValue
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def initializeGL(self):
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"""
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Called after an item is added to a GLViewWidget.
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The widget's GL context is made current before this method is called.
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(So this would be an appropriate time to generate lists, upload textures, etc.)
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"""
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pass
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def paint(self):
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"""
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Called by the GLViewWidget to draw this item.
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It is the responsibility of the item to set up its own modelview matrix,
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but the caller will take care of pushing/popping.
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"""
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pass
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