diff options
author | Picca Frédéric-Emmanuel <picca@synchrotron-soleil.fr> | 2017-08-18 14:48:52 +0200 |
---|---|---|
committer | Picca Frédéric-Emmanuel <picca@synchrotron-soleil.fr> | 2017-08-18 14:48:52 +0200 |
commit | f7bdc2acff3c13a6d632c28c4569690ab106eed7 (patch) | |
tree | 9d67cdb7152ee4e711379e03fe0546c7c3b97303 /silx/gui/data/DataViewer.py |
Import Upstream version 0.5.0+dfsg
Diffstat (limited to 'silx/gui/data/DataViewer.py')
-rw-r--r-- | silx/gui/data/DataViewer.py | 464 |
1 files changed, 464 insertions, 0 deletions
diff --git a/silx/gui/data/DataViewer.py b/silx/gui/data/DataViewer.py new file mode 100644 index 0000000..3a3ac64 --- /dev/null +++ b/silx/gui/data/DataViewer.py @@ -0,0 +1,464 @@ +# coding: utf-8 +# /*########################################################################## +# +# Copyright (c) 2016-2017 European Synchrotron Radiation Facility +# +# Permission is hereby granted, free of charge, to any person obtaining a copy +# of this software and associated documentation files (the "Software"), to deal +# in the Software without restriction, including without limitation the rights +# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +# copies of the Software, and to permit persons to whom the Software is +# furnished to do so, subject to the following conditions: +# +# The above copyright notice and this permission notice shall be included in +# all copies or substantial portions of the Software. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +# THE SOFTWARE. +# +# ###########################################################################*/ +"""This module defines a widget designed to display data using to most adapted +view from available ones from silx. +""" +from __future__ import division + +from silx.gui.data import DataViews +from silx.gui.data.DataViews import _normalizeData +import logging +from silx.gui import qt +from silx.gui.data.NumpyAxesSelector import NumpyAxesSelector + +__authors__ = ["V. Valls"] +__license__ = "MIT" +__date__ = "26/04/2017" + + +_logger = logging.getLogger(__name__) + + +class DataViewer(qt.QFrame): + """Widget to display any kind of data + + .. image:: img/DataViewer.png + + The method :meth:`setData` allows to set any data to the widget. Mostly + `numpy.array` and `h5py.Dataset` are supported with adapted views. Other + data types are displayed using a text viewer. + + A default view is automatically selected when a data is set. The method + :meth:`setDisplayMode` allows to change the view. To have a graphical tool + to select the view, prefer using the widget :class:`DataViewerFrame`. + + The dimension of the input data and the expected dimension of the selected + view can differ. For example you can display an image (2D) from 4D + data. In this case a :class:`NumpyAxesSelector` is displayed to allow the + user to select the axis mapping and the slicing of other axes. + + .. code-block:: python + + import numpy + data = numpy.random.rand(500,500) + viewer = DataViewer() + viewer.setData(data) + viewer.setVisible(True) + """ + + EMPTY_MODE = 0 + PLOT1D_MODE = 10 + PLOT2D_MODE = 20 + PLOT3D_MODE = 30 + RAW_MODE = 40 + RAW_ARRAY_MODE = 41 + RAW_RECORD_MODE = 42 + RAW_SCALAR_MODE = 43 + STACK_MODE = 50 + HDF5_MODE = 60 + + displayedViewChanged = qt.Signal(object) + """Emitted when the displayed view changes""" + + dataChanged = qt.Signal() + """Emitted when the data changes""" + + currentAvailableViewsChanged = qt.Signal() + """Emitted when the current available views (which support the current + data) change""" + + def __init__(self, parent=None): + """Constructor + + :param QWidget parent: The parent of the widget + """ + super(DataViewer, self).__init__(parent) + + self.__stack = qt.QStackedWidget(self) + self.__numpySelection = NumpyAxesSelector(self) + self.__numpySelection.selectedAxisChanged.connect(self.__numpyAxisChanged) + self.__numpySelection.selectionChanged.connect(self.__numpySelectionChanged) + self.__numpySelection.customAxisChanged.connect(self.__numpyCustomAxisChanged) + + self.setLayout(qt.QVBoxLayout(self)) + self.layout().addWidget(self.__stack, 1) + + group = qt.QGroupBox(self) + group.setLayout(qt.QVBoxLayout()) + group.layout().addWidget(self.__numpySelection) + group.setTitle("Axis selection") + self.__axisSelection = group + + self.layout().addWidget(self.__axisSelection) + + self.__currentAvailableViews = [] + self.__currentView = None + self.__data = None + self.__useAxisSelection = False + self.__userSelectedView = None + + self.__views = [] + self.__index = {} + """store stack index for each views""" + + self._initializeViews() + + def _initializeViews(self): + """Inisialize the available views""" + views = self.createDefaultViews(self.__stack) + self.__views = list(views) + self.setDisplayMode(self.EMPTY_MODE) + + def createDefaultViews(self, parent=None): + """Create and returns available views which can be displayed by default + by the data viewer. It is called internally by the widget. It can be + overwriten to provide a different set of viewers. + + :param QWidget parent: QWidget parent of the views + :rtype: list[silx.gui.data.DataViews.DataView] + """ + viewClasses = [ + DataViews._EmptyView, + DataViews._Hdf5View, + DataViews._NXdataView, + DataViews._Plot1dView, + DataViews._Plot2dView, + DataViews._Plot3dView, + DataViews._RawView, + DataViews._StackView, + ] + views = [] + for viewClass in viewClasses: + try: + view = viewClass(parent) + views.append(view) + except Exception: + _logger.warning("%s instantiation failed. View is ignored" % viewClass.__name__) + _logger.debug("Backtrace", exc_info=True) + + return views + + def clear(self): + """Clear the widget""" + self.setData(None) + + def normalizeData(self, data): + """Returns a normalized data if the embed a numpy or a dataset. + Else returns the data.""" + return _normalizeData(data) + + def __getStackIndex(self, view): + """Get the stack index containing the view. + + :param silx.gui.data.DataViews.DataView view: The view + """ + if view not in self.__index: + widget = view.getWidget() + index = self.__stack.addWidget(widget) + self.__index[view] = index + else: + index = self.__index[view] + return index + + def __clearCurrentView(self): + """Clear the current selected view""" + view = self.__currentView + if view is not None: + view.clear() + + def __numpyCustomAxisChanged(self, name, value): + view = self.__currentView + if view is not None: + view.setCustomAxisValue(name, value) + + def __updateNumpySelectionAxis(self): + """ + Update the numpy-selector according to the needed axis names + """ + previous = self.__numpySelection.blockSignals(True) + self.__numpySelection.clear() + info = DataViews.DataInfo(self.__data) + axisNames = self.__currentView.axesNames(self.__data, info) + if info.isArray and self.__data is not None and len(axisNames) > 0: + self.__useAxisSelection = True + self.__numpySelection.setAxisNames(axisNames) + self.__numpySelection.setCustomAxis(self.__currentView.customAxisNames()) + data = self.normalizeData(self.__data) + self.__numpySelection.setData(data) + if hasattr(data, "shape"): + isVisible = not (len(axisNames) == 1 and len(data.shape) == 1) + else: + isVisible = True + self.__axisSelection.setVisible(isVisible) + else: + self.__useAxisSelection = False + self.__axisSelection.setVisible(False) + self.__numpySelection.blockSignals(previous) + + def __updateDataInView(self): + """ + Update the views using the current data + """ + if self.__useAxisSelection: + self.__displayedData = self.__numpySelection.selectedData() + else: + self.__displayedData = self.__data + + qt.QTimer.singleShot(10, self.__setDataInView) + + def __setDataInView(self): + self.__currentView.setData(self.__displayedData) + + def setDisplayedView(self, view): + """Set the displayed view. + + Change the displayed view according to the view itself. + + :param silx.gui.data.DataViews.DataView view: The DataView to use to display the data + """ + self.__userSelectedView = view + self._setDisplayedView(view) + + def _setDisplayedView(self, view): + """Internal set of the displayed view. + + Change the displayed view according to the view itself. + + :param silx.gui.data.DataViews.DataView view: The DataView to use to display the data + """ + if self.__currentView is view: + return + self.__clearCurrentView() + self.__currentView = view + self.__updateNumpySelectionAxis() + self.__updateDataInView() + stackIndex = self.__getStackIndex(self.__currentView) + if self.__currentView is not None: + self.__currentView.select() + self.__stack.setCurrentIndex(stackIndex) + self.displayedViewChanged.emit(view) + + def getViewFromModeId(self, modeId): + """Returns the first available view which have the requested modeId. + + :param int modeId: Requested mode id + :rtype: silx.gui.data.DataViews.DataView + """ + for view in self.__views: + if view.modeId() == modeId: + return view + return view + + def setDisplayMode(self, modeId): + """Set the displayed view using display mode. + + Change the displayed view according to the requested mode. + + :param int modeId: Display mode, one of + + - `EMPTY_MODE`: display nothing + - `PLOT1D_MODE`: display the data as a curve + - `PLOT2D_MODE`: display the data as an image + - `PLOT3D_MODE`: display the data as an isosurface + - `RAW_MODE`: display the data as a table + - `STACK_MODE`: display the data as a stack of images + - `HDF5_MODE`: display the data as a table + """ + try: + view = self.getViewFromModeId(modeId) + except KeyError: + raise ValueError("Display mode %s is unknown" % modeId) + self._setDisplayedView(view) + + def displayedView(self): + """Returns the current displayed view. + + :rtype: silx.gui.data.DataViews.DataView + """ + return self.__currentView + + def addView(self, view): + """Allow to add a view to the dataview. + + If the current data support this view, it will be displayed. + + :param DataView view: A dataview + """ + self.__views.append(view) + # TODO It can be skipped if the view do not support the data + self.__updateAvailableViews() + + def removeView(self, view): + """Allow to remove a view which was available from the dataview. + + If the view was displayed, the widget will be updated. + + :param DataView view: A dataview + """ + self.__views.remove(view) + self.__stack.removeWidget(view.getWidget()) + # invalidate the full index. It will be updated as expected + self.__index = {} + + if self.__userSelectedView is view: + self.__userSelectedView = None + + if view is self.__currentView: + self.__updateView() + else: + # TODO It can be skipped if the view is not part of the + # available views + self.__updateAvailableViews() + + def __updateAvailableViews(self): + """ + Update available views from the current data. + """ + data = self.__data + # sort available views according to priority + info = DataViews.DataInfo(data) + priorities = [v.getDataPriority(data, info) for v in self.__views] + views = zip(priorities, self.__views) + views = filter(lambda t: t[0] > DataViews.DataView.UNSUPPORTED, views) + views = sorted(views, reverse=True) + + # store available views + if len(views) == 0: + self.__setCurrentAvailableViews([]) + available = [] + else: + available = [v[1] for v in views] + self.__setCurrentAvailableViews(available) + + def __updateView(self): + """Display the data using the widget which fit the best""" + data = self.__data + + # update available views for this data + self.__updateAvailableViews() + available = self.__currentAvailableViews + + # display the view with the most priority (the default view) + view = self.getDefaultViewFromAvailableViews(data, available) + self.__clearCurrentView() + try: + self._setDisplayedView(view) + except Exception as e: + # in case there is a problem to read the data, try to use a safe + # view + view = self.getSafeViewFromAvailableViews(data, available) + self._setDisplayedView(view) + raise e + + def getSafeViewFromAvailableViews(self, data, available): + """Returns a view which is sure to display something without failing + on rendering. + + :param object data: data which will be displayed + :param list[view] available: List of available views, from highest + priority to lowest. + :rtype: DataView + """ + hdf5View = self.getViewFromModeId(DataViewer.HDF5_MODE) + if hdf5View in available: + return hdf5View + return self.getViewFromModeId(DataViewer.EMPTY_MODE) + + def getDefaultViewFromAvailableViews(self, data, available): + """Returns the default view which will be used according to available + views. + + :param object data: data which will be displayed + :param list[view] available: List of available views, from highest + priority to lowest. + :rtype: DataView + """ + if len(available) > 0: + # returns the view with the highest priority + if self.__userSelectedView in available: + return self.__userSelectedView + self.__userSelectedView = None + view = available[0] + else: + # else returns the empty view + view = self.getViewFromModeId(DataViewer.EMPTY_MODE) + return view + + def __setCurrentAvailableViews(self, availableViews): + """Set the current available viewa + + :param List[DataView] availableViews: Current available viewa + """ + self.__currentAvailableViews = availableViews + self.currentAvailableViewsChanged.emit() + + def currentAvailableViews(self): + """Returns the list of available views for the current data + + :rtype: List[DataView] + """ + return self.__currentAvailableViews + + def availableViews(self): + """Returns the list of registered views + + :rtype: List[DataView] + """ + return self.__views + + def setData(self, data): + """Set the data to view. + + It mostly can be a h5py.Dataset or a numpy.ndarray. Other kind of + objects will be displayed as text rendering. + + :param numpy.ndarray data: The data. + """ + self.__data = data + self.__displayedData = None + self.__updateView() + self.__updateNumpySelectionAxis() + self.__updateDataInView() + self.dataChanged.emit() + + def __numpyAxisChanged(self): + """ + Called when axis selection of the numpy-selector changed + """ + self.__clearCurrentView() + + def __numpySelectionChanged(self): + """ + Called when data selection of the numpy-selector changed + """ + self.__updateDataInView() + + def data(self): + """Returns the data""" + return self.__data + + def displayMode(self): + """Returns the current display mode""" + return self.__currentView.modeId() |