source: sasview/src/sas/qtgui/Perspectives/Fitting/FittingPerspective.py @ 0215e0a

import sys
import numpy

from PyQt4 import QtCore
from PyQt4 import QtGui

import sas.qtgui.Utilities.GuiUtils as GuiUtils
import sas.qtgui.ObjectFactory as ObjectFactory

from FittingWidget import FittingWidget
from FitPage import FitPage

class FittingWindow(QtGui.QTabWidget):
    """
    """
    name = "Fitting" # For displaying in the combo box in DataExplorer
    def __init__(self, parent=None, data=None):
        super(FittingWindow, self).__init__()

        self.parent = parent
        self._data = data

        # List of active fits
        self.tabs = []

        # Max index for adding new, non-clashing tab names
        self.maxIndex = 0

        # Index of the current tab
        self.currentTab = 0

        # The current optimizer
        self.optimizer = 'DREAM'

        # The tabs need to be closeable
        self.setTabsClosable(True)

        self.communicate = self.parent.communicator()

        # Initialize the first tab
        self.addFit(None)

        # Deal with signals
        self.tabCloseRequested.connect(self.tabCloses)

        # Perspective window not allowed to close by default
        self._allow_close = False

        self.setWindowTitle('Fit panel - Active Fitting Optimizer: %s' % self.optimizer)

    def setClosable(self, value=True):
        """
        Allow outsiders close this widget
        """
        assert isinstance(value, bool)

        self._allow_close = value

    def closeEvent(self, event):
        """
        Overwrite QDialog close method to allow for custom widget close
        """
        if self._allow_close:
            # reset the closability flag
            self.setClosable(value=False)
            event.accept()
        else:
            event.ignore()
            # Maybe we should just minimize
            self.setWindowState(QtCore.Qt.WindowMinimized)

    def addFit(self, data):
        """
        Add a new tab for passed data
        """
        tab     = FittingWidget(parent=self.parent, data=data, id=self.maxIndex+1)
        # Add this tab to the object factory so it can be retrieved by scripting/jupyter
        ObjectFactory.addObject(self.tabName(), tab)
        self.tabs.append(tab)
        self.maxIndex += 1
        self.addTab(tab, self.tabName())

    def tabName(self):
        """
        Get the new tab name, based on the number of fitting tabs so far
        """
        page_name = "FitPage" + str(self.maxIndex)
        return page_name

    def tabCloses(self, index):
        """
        Update local bookkeeping on tab close
        """
        assert len(self.tabs) >= index
        # don't remove the last tab
        if len(self.tabs) <= 1:
            return
        ObjectFactory.deleteObject(self.tabs[index].accessibleName())
        del self.tabs[index]
        self.removeTab(index)

    def allowBatch(self):
        """
        Tell the caller that we accept multiple data instances
        """
        return True

    def setData(self, data_item=None):
        """
        Assign new dataset to the fitting instance
        Obtain a QStandardItem object and dissect it to get Data1D/2D
        Pass it over to the calculator
        """
        assert data_item is not None

        if not isinstance(data_item, list):
            msg = "Incorrect type passed to the Fitting Perspective"
            raise AttributeError, msg

        if not isinstance(data_item[0], QtGui.QStandardItem):
            msg = "Incorrect type passed to the Fitting Perspective"
            raise AttributeError, msg

        for data in data_item:
            # Find the first unassigned tab.
            # If none, open a new tab.
            available_tabs = list(map(lambda tab: tab.acceptsData(), self.tabs))

            if numpy.any(available_tabs):
                self.tabs[available_tabs.index(True)].data = data
            else:
                self.addFit(data)