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#!/usr/bin/env python
#############################################################################
##
## This file is part of Taurus
##
## http://taurus-scada.org
##
## Copyright 2011 CELLS / ALBA Synchrotron, Bellaterra, Spain
##
## Taurus is free software: you can redistribute it and/or modify
## it under the terms of the GNU Lesser General Public License as published by
## the Free Software Foundation, either version 3 of the License, or
## (at your option) any later version.
##
## Taurus is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
## GNU Lesser General Public License for more details.
##
## You should have received a copy of the GNU Lesser General Public License
## along with Taurus. If not, see <http://www.gnu.org/licenses/>.
##
#############################################################################
"""
nexusWidget.py:
"""
__all__=["TaurusNexusBrowser"]
import numpy
import posixpath
from PyMca import HDF5Widget, HDF5Info, HDF5DatasetTable
from taurus.external.qt import Qt
from taurus.qt.qtgui.container import TaurusWidget
from taurus.qt.qtgui.plot import TaurusPlot
import taurus.qt.qtgui.resource
class NeXusInfoWidget(Qt.QTabWidget):
def __init__(self, parent=None, info=None):
Qt.QTabWidget.__init__(self, parent)
self.generalInfoWidget = HDF5GeneralInfoWidget(self)
self.attributesInfoWidget = HDF5AttributesInfoWidget(self)
self.addTab(self.generalInfoWidget, 'General')
self.addTab(self.attributesInfoWidget, 'Attributes')
self.__previewWidget = None
def setInfoDict(self, info):
self.__previewWidget = NeXusPreviewWidgetFactory(info)
class TaurusNeXusBrowser(TaurusWidget):
''' A Browser for nexus files with optional preview. Based on PyMCA's HDF5Widget'''
def __init__(self, *args, **kwargs ):
TaurusWidget.__init__(self, *args)
fileModel = kwargs.get('fileModel', None)
if fileModel is None: fileModel = HDF5Widget.FileModel()
self.__fileModel = fileModel
self.treeWidget = HDF5Widget.HDF5Widget(self.__fileModel)
self.treeWidget.setSizePolicy(Qt.QSizePolicy(Qt.QSizePolicy.Expanding,Qt.QSizePolicy.Expanding))
# self.infoWidget = HDF5Info.HDF5InfoWidget()
self.__previewStack = Qt.QStackedWidget()
self.__currentPreview = None
#layout
self.__splitter = Qt.QSplitter()
self.__splitter.setOrientation(Qt.Qt.Vertical)
self.__splitter.addWidget(self.treeWidget)
# self.__splitter.addWidget(self.infoWidget)
self.__splitter.addWidget(self.__previewStack)
self.setLayout(Qt.QVBoxLayout())
self.layout().addWidget(self.__splitter)
#Actions
self.setContextMenuPolicy(Qt.Qt.ActionsContextMenu)
self.openFileAction = Qt.QAction(taurus.qt.qtgui.resource.getThemeIcon("document-open"), "Open Data File...", self)
self.togglePreviewAction = Qt.QAction(taurus.qt.qtgui.resource.getIcon(":/actions/view.svg"), "Show/Hide preview", self)
self.togglePreviewAction.setCheckable(True)
self.togglePreviewAction.setChecked(True)
self.addActions([self.openFileAction, self.togglePreviewAction])
#Toolbar
self._toolbar = Qt.QToolBar("NeXus browser toolbar")
self._toolbar.setIconSize(Qt.QSize(16,16))
self._toolbar.setFloatable(False)
self._toolbar.addActions([self.openFileAction, self.togglePreviewAction])
self.layout().setMenuBar(self._toolbar)
#connections
self.connect(self.__fileModel, Qt.SIGNAL('fileAppended'),self.treeWidget.fileAppended)
self.connect(self.treeWidget, Qt.SIGNAL("HDF5WidgetSignal"), self.onHDF5WidgetSignal)
self.connect(self.openFileAction, Qt.SIGNAL("triggered()"), self.openFile)
self.connect(self.togglePreviewAction, Qt.SIGNAL("toggled(bool)"), self.__previewStack.setVisible)
#configuration
self.registerConfigProperty(self.togglePreviewAction.isChecked, self.togglePreviewAction.setChecked, 'showPreview')
def openFile(self, fname=None):
if fname is None:
fname = unicode(Qt.QFileDialog.getOpenFileName(self, "Choose NeXus File","/home/cpascual/local/tmp/scantest.h5"))#@TODO!!
if fname:
self.__nexusFile = self.__fileModel.openFile(fname)
def onHDF5WidgetSignal(self, ddict):
self.__previewStack.removeWidget(self.__currentPreview)
self.__currentPreview = self.neXusPreviewWidgetFactory(ddict)
self.__previewStack.addWidget(self.__currentPreview)
self.__previewStack.setCurrentWidget(self.__currentPreview)
def neXusPreviewWidgetFactory(self, ddict):
'''returns a widget showing a preview of a node in a NeXus file'''
#@todo: check if this is the root group and it has a valid nexus data directory, in which case the default plot should be returned
if ddict['type'] == 'Dataset':
node = ddict['name']
data = self.__nexusFile[node]
if len(data.shape) == 1 and isinstance(data[0], (numpy.floating,numpy.integer,int,float)):
w = TaurusPlot()
w.attachRawData({"x":numpy.arange(len(data)),"y":data})
else:
w = HDF5DatasetTable.HDF5DatasetTable()
w.setDataset(data)
else:
info = HDF5Info.getInfo(self.__nexusFile,ddict["name"])
w = HDF5Info.HDF5InfoWidget()
w.setInfoDict(info)
return w
def neXusWidget(self):
return self.treeWidget
def findNodeIndex(self, filename, nodename):
nexus_widget = self.neXusWidget()
file_model = nexus_widget.model()
for node in file_model.rootItem.children:
if node.file.filename == filename:
file_node = node
break
else:
raise Exception("Could not find file %s" % filename)
index = file_model.index(file_node.row, 0, Qt.QModelIndex())
node_parts = nodename.split(posixpath.sep)
while node_parts:
name = posixpath.basename(node_parts.pop(0))
for child in node.children:
child_name = posixpath.basename(child.name)
if child_name == name:
node = child
index = file_model.index(node.row, 0, index)
break
else:
raise Exception("Could not find node %s in %s" % (name, filename))
return index
def setCurrentNode(self, filename, nodename):
index = self.findNodeIndex(filename, nodename)
self.setCurrentIndex(index)
@classmethod
def getQtDesignerPluginInfo(cls):
ret = TaurusWidget.getQtDesignerPluginInfo()
ret['module'] = 'taurus.qt.qtgui.extra_nexus'
ret['icon'] = ":/designer/listview.png"
ret['container'] = False
ret['group'] = 'Taurus Views'
return ret
if __name__ == "__main__":
import sys
if len(sys.argv) >1:
fname = sys.argv[1]
else:
fname=None
app = Qt.QApplication(sys.argv)
w = TaurusNeXusBrowser()
w.openFile(fname)
w.show()
sys.exit(app.exec_())
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