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minor code cleanups

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pyside-specific bugfixes 
(there is still one pyside bug for which I have no workaround: https://bugreports.qt-project.org/browse/PYSIDE-86)
This commit is contained in:
Luke Campagnola 2012-06-18 19:52:11 -04:00
commit 3fc741abdc
7 changed files with 43 additions and 38 deletions
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7
GraphicsScene/GraphicsScene.py
View File

@ -13,10 +13,13 @@ from .mouseEvents import *
import pyqtgraph.debug as debug
from . import exportDialog
try:
if hasattr(QtCore, 'PYQT_VERSION'):
try:
import sip
HAVE_SIP = True
except:
except ImportError:
HAVE_SIP = False
else:
HAVE_SIP = False

5
__init__.py
View File

@ -193,7 +193,10 @@ show = image ## for backward compatibility
def mkQApp():
global QAPP
if QtGui.QApplication.instance() is None:
inst = QtGui.QApplication.instance()
if inst is None:
QAPP = QtGui.QApplication([])
else:
QAPP = inst
return QAPP

10
flowchart/library/Filters.py
View File

@ -8,11 +8,7 @@ from . import functions
from .common import *
import numpy as np
try:
import metaarray
HAVE_METAARRAY = True
except:
HAVE_METAARRAY = False
import pyqtgraph.metaarray as metaarray
class Downsample(CtrlNode):
@ -145,11 +141,11 @@ class Derivative(CtrlNode):
nodeName = 'DerivativeFilter'
def processData(self, data):
if HAVE_METAARRAY and (hasattr(data, 'implements') and data.implements('MetaArray')):
if hasattr(data, 'implements') and data.implements('MetaArray'):
info = data.infoCopy()
if 'values' in info[0]:
info[0]['values'] = info[0]['values'][:-1]
return MetaArray(data[1:] - data[:-1], info=info)
return metaarray.MetaArray(data[1:] - data[:-1], info=info)
else:
return data[1:] - data[:-1]

28
graphicsItems/GraphicsItem.py
View File

@ -15,12 +15,21 @@ class GraphicsItem(object):
The GraphicsView system places a lot of emphasis on the notion that the graphics within the scene should be device independent--you should be able to take the same graphics and display them on screens of different resolutions, printers, export to SVG, etc. This is nice in principle, but causes me a lot of headache in practice. It means that I have to circumvent all the device-independent expectations any time I want to operate in pixel coordinates rather than arbitrary scene coordinates. A lot of the code in GraphicsItem is devoted to this task--keeping track of view widgets and device transforms, computing the size and shape of a pixel in local item coordinates, etc. Note that in item coordinates, a pixel does not have to be square or even rectangular, so just asking how to increase a bounding rect by 2px can be a rather complex task.
"""
def __init__(self, register=True):
if not hasattr(self, '_qtBaseClass'):
for b in self.__class__.__bases__:
if issubclass(b, QtGui.QGraphicsItem):
self.__class__._qtBaseClass = b
break
if not hasattr(self, '_qtBaseClass'):
raise Exception('Could not determine Qt base class for GraphicsItem: %s' % str(self))
self._viewWidget = None
self._viewBox = None
self._connectedView = None
if register:
GraphicsScene.registerObject(self) ## workaround for pyqt bug in graphicsscene.items()
def getViewWidget(self):
"""
Return the view widget for this item. If the scene has multiple views, only the first view is returned.
@ -76,7 +85,7 @@ class GraphicsItem(object):
if view is None:
return None
viewportTransform = view.viewportTransform()
dt = QtGui.QGraphicsObject.deviceTransform(self, viewportTransform)
dt = self._qtBaseClass.deviceTransform(self, viewportTransform)
#xmag = abs(dt.m11())+abs(dt.m12())
#ymag = abs(dt.m21())+abs(dt.m22())
@ -274,19 +283,26 @@ class GraphicsItem(object):
return vt.mapRect(obj)
def pos(self):
return Point(QtGui.QGraphicsObject.pos(self))
return Point(self._qtBaseClass.pos(self))
def viewPos(self):
return self.mapToView(self.mapFromParent(self.pos()))
def parentItem(self):
## PyQt bug -- some items are returned incorrectly.
return GraphicsScene.translateGraphicsItem(QtGui.QGraphicsObject.parentItem(self))
return GraphicsScene.translateGraphicsItem(self._qtBaseClass.parentItem(self))
def setParentItem(self, parent):
## Workaround for Qt bug: https://bugreports.qt-project.org/browse/QTBUG-18616
if parent is not None:
pscene = parent.scene()
if pscene is not None and self.scene() is not pscene:
pscene.addItem(self)
return self._qtBaseClass.setParentItem(self, parent)
def childItems(self):
## PyQt bug -- some child items are returned incorrectly.
return list(map(GraphicsScene.translateGraphicsItem, QtGui.QGraphicsObject.childItems(self)))
return list(map(GraphicsScene.translateGraphicsItem, self._qtBaseClass.childItems(self)))
def sceneTransform(self):
@ -296,7 +312,7 @@ class GraphicsItem(object):
if self.scene() is None:
return self.transform()
else:
return QtGui.QGraphicsObject.sceneTransform(self)
return self._qtBaseClass.sceneTransform(self)
def transformAngle(self, relativeItem=None):
@ -315,7 +331,7 @@ class GraphicsItem(object):
#def itemChange(self, change, value):
#ret = QtGui.QGraphicsObject.itemChange(self, change, value)
#ret = self._qtBaseClass.itemChange(self, change, value)
#if change == self.ItemParentHasChanged or change == self.ItemSceneHasChanged:
#print "Item scene changed:", self
#self.setChildScene(self) ## This is bizarre.

11
graphicsItems/GraphicsObject.py
View File

@ -8,6 +8,7 @@ class GraphicsObject(GraphicsItem, QtGui.QGraphicsObject):
Extension of QGraphicsObject with some useful methods (provided by :class:`GraphicsItem <pyqtgraph.graphicsItems.GraphicsItem>`)
"""
_qtBaseClass = QtGui.QGraphicsObject
def __init__(self, *args):
QtGui.QGraphicsObject.__init__(self, *args)
GraphicsItem.__init__(self)
@ -17,13 +18,3 @@ class GraphicsObject(GraphicsItem, QtGui.QGraphicsObject):
if change in [self.ItemParentHasChanged, self.ItemSceneHasChanged]:
self._updateView()
return ret
def setParentItem(self, parent):
## Workaround for Qt bug: https://bugreports.qt-project.org/browse/QTBUG-18616
if parent is not None:
pscene = parent.scene()
if pscene is not None and self.scene() is not pscene:
pscene.addItem(self)
return QtGui.QGraphicsObject.setParentItem(self, parent)

14
graphicsItems/GraphicsWidget.py
View File

@ -5,6 +5,8 @@ from .GraphicsItem import GraphicsItem
__all__ = ['GraphicsWidget']
class GraphicsWidget(GraphicsItem, QtGui.QGraphicsWidget):
_qtBaseClass = QtGui.QGraphicsWidget
def __init__(self, *args, **kargs):
"""
**Bases:** :class:`GraphicsItem <pyqtgraph.GraphicsItem>`, :class:`QtGui.QGraphicsWidget`
@ -14,7 +16,9 @@ class GraphicsWidget(GraphicsItem, QtGui.QGraphicsWidget):
"""
QtGui.QGraphicsWidget.__init__(self, *args, **kargs)
GraphicsItem.__init__(self)
GraphicsScene.registerObject(self) ## workaround for pyqt bug in graphicsscene.items()
## done by GraphicsItem init
#GraphicsScene.registerObject(self) ## workaround for pyqt bug in graphicsscene.items()
## Removed because this causes segmentation faults. Don't know why.
# def itemChange(self, change, value):
@ -52,11 +56,3 @@ class GraphicsWidget(GraphicsItem, QtGui.QGraphicsWidget):
return p
def setParentItem(self, parent):
## Workaround for Qt bug: https://bugreports.qt-project.org/browse/QTBUG-18616
if parent is not None:
pscene = parent.scene()
if pscene is not None and self.scene() is not pscene:
pscene.addItem(self)
return QtGui.QGraphicsObject.setParentItem(self, parent)

2
graphicsItems/ScatterPlotItem.py
View File

@ -36,7 +36,7 @@ for k, c in coords.items():
def makeSymbolPixmap(size, pen, brush, symbol):
## Render a spot with the given parameters to a pixmap
penPxWidth = max(np.ceil(pen.width()), 1)
image = QtGui.QImage(size+penPxWidth, size+penPxWidth, QtGui.QImage.Format_ARGB32_Premultiplied)
image = QtGui.QImage(int(size+penPxWidth), int(size+penPxWidth), QtGui.QImage.Format_ARGB32_Premultiplied)
image.fill(0)
p = QtGui.QPainter(image)
p.setRenderHint(p.Antialiasing)