Python Qt4_data_path_widget.DataPathWidget类代码示例

    def __init__(self, parent = None, name = None, fl = 0):
        CreateTaskBase.__init__(self, parent, name, QtCore.Qt.WindowFlags(fl), 'XRF-scan')
 
        if name is not None:
            self.setObjectName(name)

        # Hardware objects ----------------------------------------------------

        # Internal variables --------------------------------------------------
	self.count_time = None

        self.init_models()

        # Graphic elements ----------------------------------------------------
        self._data_path_gbox = QtGui.QGroupBox('Data location', self)
        self._data_path_widget = DataPathWidget(self._data_path_gbox, 
                                               data_model = self._path_template,
                                               layout = 'vertical')

	_parameters_gbox = QtGui.QGroupBox('Parameters', self)
	_count_time_label = QtGui.QLabel("Count time (sec.):", _parameters_gbox)
	self.count_time_ledit = QtGui.QLineEdit("1", _parameters_gbox)
        self.count_time_ledit.setMaximumWidth(75)

        # Layout --------------------------------------------------------------
        self._data_path_gbox_vlayout = QtGui.QVBoxLayout(self)
        self._data_path_gbox_vlayout.addWidget(self._data_path_widget)
        self._data_path_gbox_vlayout.setSpacing(0)
        self._data_path_gbox_vlayout.setContentsMargins(0, 0, 0, 0)
        self._data_path_gbox.setLayout(self._data_path_gbox_vlayout)

        _parameters_gbox_hlayout = QtGui.QHBoxLayout(self)
        _parameters_gbox_hlayout.addWidget(_count_time_label)
        _parameters_gbox_hlayout.addWidget(self.count_time_ledit)
        _parameters_gbox_hlayout.addStretch(0)
        _parameters_gbox_hlayout.setSpacing(2)
        _parameters_gbox_hlayout.setContentsMargins(0, 0, 0, 0)
        _parameters_gbox.setLayout(_parameters_gbox_hlayout)

        _main_vlayout = QtGui.QVBoxLayout(self)
	_main_vlayout.addWidget(self._data_path_gbox)
	_main_vlayout.addWidget(_parameters_gbox)
        _main_vlayout.setSpacing(2)
        _main_vlayout.setContentsMargins(2, 2, 2, 2)
        _main_vlayout.addStretch(0)
        self.setLayout(_main_vlayout)

        # SizePolicies --------------------------------------------------------

        # Qt signal/slot connections ------------------------------------------
        self._data_path_widget.data_path_layout.run_number_ledit.textChanged.\
             connect(self._run_number_ledit_change)
        
        self.connect(self._data_path_widget,
                     QtCore.SIGNAL("pathTemplateChanged"),
                     self.handle_path_conflict)

    def __init__(self, parent = None, name = "parameter_widget"):

        QtGui.QWidget.__init__(self, parent)
        if name is not None:
            self.setObjectName(name) 

        # Properties ----------------------------------------------------------

        # Signals ------------------------------------------------------------

        # Slots ---------------------------------------------------------------

        # Hardware objects ----------------------------------------------------
        self._beamline_setup_hwobj = None

        # Internal variables --------------------------------------------------
        self._data_collection = None
        self.add_dc_cb = None
        self._tree_view_item = None

        # Graphic elements ----------------------------------------------------
        _dc_parameters_widget = QtGui.QWidget(self)
        self._data_path_widget = DataPathWidget(_dc_parameters_widget)
        self._acq_widget = AcquisitionWidget(_dc_parameters_widget, 
                                            layout = 'horizontal')
        self._processing_widget = ProcessingWidget(_dc_parameters_widget)
        
        # Layout --------------------------------------------------------------
        _dc_parameters_widget_layout = QtGui.QVBoxLayout(_dc_parameters_widget)
        _dc_parameters_widget_layout.addWidget(self._data_path_widget)
        _dc_parameters_widget_layout.addWidget(self._acq_widget)
        _dc_parameters_widget_layout.addWidget(self._processing_widget)
        _dc_parameters_widget_layout.setContentsMargins(0, 0, 0, 0)
        _dc_parameters_widget_layout.setSpacing(2)
        _dc_parameters_widget_layout.addStretch(10)

        _main_hlayout = QtGui.QHBoxLayout(self)
        _main_hlayout.addWidget(_dc_parameters_widget)
        _main_hlayout.setContentsMargins(0, 0, 0, 0)
        _main_hlayout.setSpacing(2)
        _main_hlayout.addStretch(0)

        # SizePolicies --------------------------------------------------------
        

        # Qt signal/slot connections ------------------------------------------
        self._data_path_widget.data_path_layout.prefix_ledit.textChanged.\
             connect(self._prefix_ledit_change)
        self._data_path_widget.data_path_layout.run_number_ledit.textChanged.\
             connect(self._run_number_ledit_change)
        self._acq_widget.madEnergySelectedSignal.\
             connect(self.mad_energy_selected)
        self._acq_widget.acqParametersChangedSignal.\
             connect(self.acq_parameters_changed)

    def __init__(self, parent = None, name = None, fl = 0):
        CreateTaskBase.__init__(self, parent, name, 
            Qt.WindowFlags(fl), 'XRF spectrum')
 
        if name is not None:
            self.setObjectName(name)

        # Hardware objects ----------------------------------------------------

        # Internal variables --------------------------------------------------
        self.count_time = None

        self.init_models()

        # Graphic elements ----------------------------------------------------
        self._data_path_widget = DataPathWidget(self, 
             data_model = self._path_template, layout = 'vertical')

        _parameters_gbox = QGroupBox('Parameters', self)
        _count_time_label = QLabel("Count time (sec.):", _parameters_gbox)
        self.count_time_ledit = QLineEdit("1", _parameters_gbox)
        #self.count_time_ledit.setMaximumWidth(75)
        self.adjust_transmission_cbox = QCheckBox(\
             "Adjust transmission", _parameters_gbox)
        self.adjust_transmission_cbox.setChecked(True)
        

        # Layout --------------------------------------------------------------
        _parameters_gbox_hlayout = QHBoxLayout(_parameters_gbox)
        _parameters_gbox_hlayout.addWidget(_count_time_label)
        _parameters_gbox_hlayout.addWidget(self.count_time_ledit) 
        _parameters_gbox_hlayout.addWidget(self.adjust_transmission_cbox)
        _parameters_gbox_hlayout.addStretch(0)
        _parameters_gbox_hlayout.setSpacing(2)
        _parameters_gbox_hlayout.setContentsMargins(0, 0, 0, 0)

        _main_vlayout = QVBoxLayout(self)
        _main_vlayout.addWidget(self._data_path_widget)
        _main_vlayout.addWidget(_parameters_gbox)
        _main_vlayout.setSpacing(6)
        _main_vlayout.setContentsMargins(2, 2, 2, 2)
        _main_vlayout.addStretch(0)

        # SizePolicies --------------------------------------------------------

        # Qt signal/slot connections ------------------------------------------
        self._data_path_widget.pathTemplateChangedSignal.\
             connect(self.path_template_changed)
        self.adjust_transmission_cbox.stateChanged.connect(\
             self.adjust_transmission_state_changed)

        # Other ---------------------------------------------------------------
        self._data_path_widget.data_path_layout.compression_cbox.setVisible(False)

    def __init__(self, parent=None, name="advanced_parameters_widget"):
        QtGui.QWidget.__init__(self, parent)

        # Hardware objects ----------------------------------------------------
        self._queue_model_hwobj = None
        self._beamline_setup_hwobj = None

        # Internal values -----------------------------------------------------
        self._data_collection = None
        self._tree_view_item = None

        # Properties ----------------------------------------------------------

        # Signals -------------------------------------------------------------

        # Slots ---------------------------------------------------------------

        # Graphic elements ----------------------------------------------------
        _dc_parameters_widget = QtGui.QWidget(self)
        self._data_path_widget = DataPathWidget(_dc_parameters_widget)
        self._acq_widget = AcquisitionWidget(_dc_parameters_widget, layout="horizontal")

        # Layout --------------------------------------------------------------
        _dc_parameters_widget_layout = QtGui.QVBoxLayout(_dc_parameters_widget)
        _dc_parameters_widget_layout.addWidget(self._data_path_widget)
        _dc_parameters_widget_layout.addWidget(self._acq_widget)
        _dc_parameters_widget_layout.setSpacing(2)
        _dc_parameters_widget_layout.addStretch(10)
        _dc_parameters_widget_layout.setContentsMargins(0, 0, 0, 0)

        _main_hlayout = QtGui.QHBoxLayout(self)
        _main_hlayout.addWidget(_dc_parameters_widget)
        _main_hlayout.setSpacing(2)
        _main_hlayout.setContentsMargins(2, 2, 2, 2)
        _main_hlayout.addStretch(0)

        # Qt signal/slot connections ------------------------------------------
        # self._acq_widget.acqParametersChangedSignal.\
        #     connect(self.acq_parameters_changed)
        # self._data_path_widget.pathTemplateChangedSignal.\
        #     connect(self.acq_parameters_changed)
        self._acq_widget.madEnergySelectedSignal.connect(self.mad_energy_selected)

        # Ohter ---------------------------------------------------------------
        self._acq_widget.use_osc_start(False)
        self._acq_widget.acq_widget_layout.mad_cbox.hide()
        self._acq_widget.acq_widget_layout.energies_combo.hide()
        self._acq_widget.acq_widget_layout.num_images_ledit.setEnabled(False)
        self._acq_widget.acq_widget_layout.inverse_beam_cbx.hide()
        self._acq_widget.acq_widget_layout.shutterless_cbx.hide()
        self._acq_widget.acq_widget_layout.subwedge_size_label.hide()
        self._acq_widget.acq_widget_layout.subwedge_size_ledit.hide()

    def __init__(self, parent = None, name = None, fl = 0):
        CreateTaskBase.__init__(self, parent, name, 
            Qt.WindowFlags(fl), 'XRF spectrum')
 
        if name is not None:
            self.setObjectName(name)

        # Hardware objects ----------------------------------------------------

        # Internal variables --------------------------------------------------
        self.count_time = None

        self.init_models()

        # Graphic elements ----------------------------------------------------
        self._data_path_widget = DataPathWidget(self, 
             data_model = self._path_template, layout = 'vertical')

        self._parameters_widget = loadUi(os.path.join(os.path.dirname(__file__),
                        "ui_files/Qt4_xrf_parameters_widget_layout.ui"))
        
        self.adjust_transmission_cbox = self._parameters_widget.adjust_transmission_cbox
        self.excitation_energy_ledit = self._parameters_widget.excitation_energy_ledit
        self.excitation_energy_ledit.setText("15.00")
        self.count_time_ledit = self._parameters_widget.count_time_ledit
        self.count_time_ledit.setText("10")
        
        # Layout --------------------------------------------------------------
        
        _main_vlayout = QVBoxLayout(self)
        _main_vlayout.addWidget(self._data_path_widget)
        _main_vlayout.addWidget(self._parameters_widget)
        _main_vlayout.setSpacing(6)
        _main_vlayout.setContentsMargins(2, 2, 2, 2)
        _main_vlayout.addStretch(0)

        # SizePolicies --------------------------------------------------------

        # Qt signal/slot connections ------------------------------------------
        self._data_path_widget.pathTemplateChangedSignal.\
             connect(self.path_template_changed)
        self.adjust_transmission_cbox.stateChanged.connect(\
             self.adjust_transmission_state_changed)

class EnergyScanParametersWidget(QtGui.QWidget):
    def __init__(self, parent=None, name="energy_scan_tab_widget"):
        QtGui.QWidget.__init__(self, parent)

        if name is not None:
            self.setObjectName(name)

        # Hardware objects ----------------------------------------------------

        # Internal variables --------------------------------------------------
        self.energy_scan_model = queue_model_objects.EnergyScan()
        self._tree_view_item = None

        # Graphic elements ----------------------------------------------------
        _top_widget = QtGui.QWidget(self)
        _parameters_widget = QtGui.QWidget(_top_widget)
        self.periodic_table_widget = PeriodicTableWidget(_parameters_widget)
        self.data_path_widget = DataPathWidget(_parameters_widget)
        self.data_path_widget.data_path_layout.file_name_label.setText("")
        self.data_path_widget.data_path_layout.file_name_value_label.hide()
        self.position_widget = uic.loadUi(
            os.path.join(os.path.dirname(__file__), "ui_files/Qt4_snapshot_widget_layout.ui")
        )
        self.position_widget.setFixedSize(450, 340)

        self.scan_plot_widget = TwoAxisPlotWidget(self)
        self.scan_plot_widget.set_real_time_plot(True)
        self.result_plot_widget = TwoAxisPlotWidget(self)

        """self.scan_plot_widget = ScanPlotWidget(self)
        self.scan_plot_widget.setRealTimePlot(True)
        self.result_plot_widget = ScanPlotWidget(self)
        self.result_plot_widget.setRealTimePlot(False)
        self.scan_plot_widget.setFixedHeight(200)
        self.result_plot_widget.setFixedHeight(200)"""

        # Layout -------------------------------------------------------------
        _parameters_widget_layout = QtGui.QVBoxLayout()
        _parameters_widget_layout.addWidget(self.periodic_table_widget)
        _parameters_widget_layout.addWidget(self.data_path_widget)
        _parameters_widget_layout.addStretch(0)
        _parameters_widget_layout.setSpacing(2)
        _parameters_widget_layout.setContentsMargins(0, 0, 0, 0)
        _parameters_widget.setLayout(_parameters_widget_layout)

        _top_widget_hlayout = QtGui.QHBoxLayout(self)
        _top_widget_hlayout.addWidget(_parameters_widget)
        _top_widget_hlayout.addWidget(self.position_widget)
        _top_widget_hlayout.addStretch(0)
        _top_widget_hlayout.setSpacing(2)
        _top_widget_hlayout.setContentsMargins(0, 0, 0, 0)
        _top_widget.setLayout(_top_widget_hlayout)

        _main_vlayout = QtGui.QVBoxLayout(self)
        _main_vlayout.addWidget(_top_widget)
        _main_vlayout.addWidget(self.scan_plot_widget)
        _main_vlayout.addWidget(self.result_plot_widget)
        _main_vlayout.setSpacing(2)
        _main_vlayout.setContentsMargins(2, 2, 2, 2)
        _main_vlayout.addStretch(0)

        self.setLayout(_main_vlayout)

        # SizePolicies --------------------------------------------------------

        # Qt signal/slot connections ------------------------------------------
        # qt.QObject.connect(self.periodic_table_widget, qt.PYSIGNAL('edgeSelected'),
        #                   self.element_clicked)

        self.data_path_widget.data_path_layout.prefix_ledit.textChanged.connect(self._prefix_ledit_change)

        self.data_path_widget.data_path_layout.run_number_ledit.textChanged.connect(self._run_number_ledit_change)

        # qt.QObject.connect(qt.qApp, qt.PYSIGNAL('tab_changed'),
        #                   self.tab_changed)

        # Other ---------------------------------------------------------------

        Qt4_widget_colors.set_widget_color(self.periodic_table_widget, Qt4_widget_colors.GROUP_BOX_GRAY)
        Qt4_widget_colors.set_widget_color(self.position_widget, Qt4_widget_colors.GROUP_BOX_GRAY)
        Qt4_widget_colors.set_widget_color(self.data_path_widget, Qt4_widget_colors.GROUP_BOX_GRAY)

    def _prefix_ledit_change(self, new_value):
        self.energy_scan_model.set_name(str(new_value))
        self._tree_view_item.setText(0, self.energy_scan_model.get_name())

    def _run_number_ledit_change(self, new_value):
        if str(new_value).isdigit():
            self.energy_scan_model.set_number(int(new_value))
            self._tree_view_item.setText(0, self.energy_scan_model.get_name())

    def tab_changed(self):
        if self._tree_view_item:
            self.populate_widget(self._tree_view_item)

    def populate_widget(self, item):
        self._tree_view_item = item
        self.energy_scan_model = item.get_model()
        executed = self.energy_scan_model.is_executed()

#.........这里部分代码省略.........

class CreateXRFScanWidget(CreateTaskBase):
    def __init__(self, parent=None, name=None, fl=0):
        CreateTaskBase.__init__(self, parent, name, QtCore.Qt.WindowFlags(fl), "XRF-scan")

        if name is not None:
            self.setObjectName(name)

        # Hardware objects ----------------------------------------------------

        # Internal variables --------------------------------------------------
        self.count_time = None

        self.init_models()

        # Graphic elements ----------------------------------------------------
        self._data_path_gbox = QtGui.QGroupBox("Data location", self)
        self._data_path_widget = DataPathWidget(self._data_path_gbox, data_model=self._path_template, layout="vertical")

        _parameters_gbox = QtGui.QGroupBox("Parameters", self)
        _count_time_label = QtGui.QLabel("Count time (sec.):", _parameters_gbox)
        self.count_time_ledit = QtGui.QLineEdit("1", _parameters_gbox)
        self.count_time_ledit.setMaximumWidth(75)

        # Layout --------------------------------------------------------------
        self._data_path_gbox_vlayout = QtGui.QVBoxLayout(self)
        self._data_path_gbox_vlayout.addWidget(self._data_path_widget)
        self._data_path_gbox_vlayout.setSpacing(0)
        self._data_path_gbox_vlayout.setContentsMargins(0, 0, 0, 0)
        self._data_path_gbox.setLayout(self._data_path_gbox_vlayout)

        _parameters_gbox_hlayout = QtGui.QHBoxLayout(self)
        _parameters_gbox_hlayout.addWidget(_count_time_label)
        _parameters_gbox_hlayout.addWidget(self.count_time_ledit)
        _parameters_gbox_hlayout.addStretch(0)
        _parameters_gbox_hlayout.setSpacing(2)
        _parameters_gbox_hlayout.setContentsMargins(0, 0, 0, 0)
        _parameters_gbox.setLayout(_parameters_gbox_hlayout)

        _main_vlayout = QtGui.QVBoxLayout(self)
        _main_vlayout.addWidget(self._data_path_gbox)
        _main_vlayout.addWidget(_parameters_gbox)
        _main_vlayout.setSpacing(2)
        _main_vlayout.setContentsMargins(2, 2, 2, 2)
        _main_vlayout.addStretch(0)
        self.setLayout(_main_vlayout)

        # SizePolicies --------------------------------------------------------

        # Qt signal/slot connections ------------------------------------------
        self._data_path_widget.data_path_layout.run_number_ledit.textChanged.connect(self._run_number_ledit_change)

        self.connect(self._data_path_widget, QtCore.SIGNAL("pathTemplateChanged"), self.handle_path_conflict)

        # Other ---------------------------------------------------------------

    def init_models(self):
        CreateTaskBase.init_models(self)
        self.enery_scan = queue_model_objects.XRFScan()
        self._path_template.start_num = 1
        self._path_template.num_files = 1
        self._path_template.suffix = "raw"

    def single_item_selection(self, tree_item):
        CreateTaskBase.single_item_selection(self, tree_item)
        escan_model = tree_item.get_model()

        if isinstance(tree_item, Qt4_queue_item.XRFScanQueueItem):
            if tree_item.get_model().is_executed():
                self.setDisabled(True)
            else:
                self.setDisabled(False)

            if escan_model.get_path_template():
                self._path_template = escan_model.get_path_template()

            self._data_path_widget.update_data_model(self._path_template)
        elif not (
            isinstance(tree_item, Qt4_queue_item.SampleQueueItem)
            or isinstance(tree_item, Qt4_queue_item.DataCollectionGroupQueueItem)
        ):
            self.setDisabled(True)

    def approve_creation(self):
        base_result = CreateTaskBase.approve_creation(self)

        self.count_time = None

        try:
            self.count_time = float(str(self.count_time_ledit.text()))
        except:
            logging.getLogger("user_level_log").info("Incorrect count time value.")

        return base_result and self.count_time

    # Called by the owning widget (task_toolbox_widget) to create
    # a collection. When a data collection group is selected.
    def _create_task(self, sample, shape):
        data_collections = []

        if self.count_time is not None:
#.........这里部分代码省略.........

    def __init__(self, parent = None, name = "advanced_parameters_widget"):
        QtGui.QWidget.__init__(self, parent)

        # Hardware objects ----------------------------------------------------
        self._queue_model_hwobj = None
        self._beamline_setup_hwobj = None

        # Internal values -----------------------------------------------------
        self._data_collection = None
        self._tree_view_item = None

        # Properties ----------------------------------------------------------

        # Signals -------------------------------------------------------------

        # Slots ---------------------------------------------------------------

        # Graphic elements ----------------------------------------------------
        _dc_parameters_widget = QtGui.QWidget(self)
        self._data_path_widget = DataPathWidget(_dc_parameters_widget)
        self._acq_widget = AcquisitionWidget(_dc_parameters_widget,
                                            layout = 'horizontal')
        #self._acq_widget.setFixedHeight(170)
        _snapshot_widget = QtGui.QWidget(self)
        self.position_widget = uic.loadUi(os.path.join(os.path.dirname(__file__),
                                          'ui_files/Qt4_snapshot_widget_layout.ui'))

        # Layout --------------------------------------------------------------
        _dc_parameters_widget_layout = QtGui.QVBoxLayout(_dc_parameters_widget)
        _dc_parameters_widget_layout.addWidget(self._data_path_widget)
        _dc_parameters_widget_layout.addWidget(self._acq_widget)
        _dc_parameters_widget_layout.setSpacing(2)
        _dc_parameters_widget_layout.addStretch(10)
        _dc_parameters_widget_layout.setContentsMargins(0, 0, 0, 0)

        _snapshots_vlayout = QtGui.QVBoxLayout(_snapshot_widget)
        _snapshots_vlayout.addWidget(self.position_widget)
        _snapshots_vlayout.setContentsMargins(0, 0, 0, 0)
        _snapshots_vlayout.setSpacing(2)
        _snapshots_vlayout.addStretch(10)

        _main_hlayout = QtGui.QHBoxLayout(self)
        _main_hlayout.addWidget(_dc_parameters_widget)
        _main_hlayout.addWidget(_snapshot_widget)
        _main_hlayout.setSpacing(2)
        _main_hlayout.setContentsMargins(2, 2, 2, 2)
        _main_hlayout.addStretch(0)

        # Qt signal/slot connections ------------------------------------------
        self._data_path_widget.data_path_layout.prefix_ledit.textChanged.connect(
                     self._prefix_ledit_change)
        self._data_path_widget.data_path_layout.run_number_ledit.textChanged.connect(
                     self._run_number_ledit_change)
        self._acq_widget.madEnergySelectedSignal.connect(\
             self.mad_energy_selected)
        self._acq_widget.acqParametersChangedSignal.connect(\
             self.handle_path_conflict)

        # Ohter ---------------------------------------------------------------
        self._acq_widget.use_osc_start(False)
        self._acq_widget.acq_widget_layout.mad_cbox.hide()
        self._acq_widget.acq_widget_layout.energies_combo.hide()
        self._acq_widget.acq_widget_layout.num_images_ledit.setEnabled(False)
        self._acq_widget.acq_widget_layout.inverse_beam_cbx.hide()
        self._acq_widget.acq_widget_layout.shutterless_cbx.hide()
        self._acq_widget.acq_widget_layout.subwedge_size_label.hide()
        self._acq_widget.acq_widget_layout.subwedge_size_ledit.hide()

class AdvancedParametersWidget(QtGui.QWidget):
    def __init__(self, parent = None, name = "advanced_parameters_widget"):
        QtGui.QWidget.__init__(self, parent)

        # Hardware objects ----------------------------------------------------
        self._queue_model_hwobj = None
        self._beamline_setup_hwobj = None

        # Internal values -----------------------------------------------------
        self._data_collection = None
        self._tree_view_item = None

        # Properties ----------------------------------------------------------

        # Signals -------------------------------------------------------------

        # Slots ---------------------------------------------------------------

        # Graphic elements ----------------------------------------------------
        _dc_parameters_widget = QtGui.QWidget(self)
        self._data_path_widget = DataPathWidget(_dc_parameters_widget)
        self._acq_widget = AcquisitionWidget(_dc_parameters_widget,
                                            layout = 'horizontal')
        #self._acq_widget.setFixedHeight(170)
        _snapshot_widget = QtGui.QWidget(self)
        self.position_widget = uic.loadUi(os.path.join(os.path.dirname(__file__),
                                          'ui_files/Qt4_snapshot_widget_layout.ui'))

        # Layout --------------------------------------------------------------
        _dc_parameters_widget_layout = QtGui.QVBoxLayout(_dc_parameters_widget)
        _dc_parameters_widget_layout.addWidget(self._data_path_widget)
        _dc_parameters_widget_layout.addWidget(self._acq_widget)
        _dc_parameters_widget_layout.setSpacing(2)
        _dc_parameters_widget_layout.addStretch(10)
        _dc_parameters_widget_layout.setContentsMargins(0, 0, 0, 0)

        _snapshots_vlayout = QtGui.QVBoxLayout(_snapshot_widget)
        _snapshots_vlayout.addWidget(self.position_widget)
        _snapshots_vlayout.setContentsMargins(0, 0, 0, 0)
        _snapshots_vlayout.setSpacing(2)
        _snapshots_vlayout.addStretch(10)

        _main_hlayout = QtGui.QHBoxLayout(self)
        _main_hlayout.addWidget(_dc_parameters_widget)
        _main_hlayout.addWidget(_snapshot_widget)
        _main_hlayout.setSpacing(2)
        _main_hlayout.setContentsMargins(2, 2, 2, 2)
        _main_hlayout.addStretch(0)

        # Qt signal/slot connections ------------------------------------------
        self._data_path_widget.data_path_layout.prefix_ledit.textChanged.connect(
                     self._prefix_ledit_change)
        self._data_path_widget.data_path_layout.run_number_ledit.textChanged.connect(
                     self._run_number_ledit_change)
        self._acq_widget.madEnergySelectedSignal.connect(\
             self.mad_energy_selected)
        self._acq_widget.acqParametersChangedSignal.connect(\
             self.handle_path_conflict)

        # Ohter ---------------------------------------------------------------
        self._acq_widget.use_osc_start(False)
        self._acq_widget.acq_widget_layout.mad_cbox.hide()
        self._acq_widget.acq_widget_layout.energies_combo.hide()
        self._acq_widget.acq_widget_layout.num_images_ledit.setEnabled(False)
        self._acq_widget.acq_widget_layout.inverse_beam_cbx.hide()
        self._acq_widget.acq_widget_layout.shutterless_cbx.hide()
        self._acq_widget.acq_widget_layout.subwedge_size_label.hide()
        self._acq_widget.acq_widget_layout.subwedge_size_ledit.hide()

    def set_beamline_setup(self, bl_setup):
        self._beamline_setup_hwobj = bl_setup
        self._acq_widget.set_beamline_setup(bl_setup)

    def _prefix_ledit_change(self, new_value):
        prefix = self._data_collection.acquisitions[0].\
                 path_template.get_prefix()
        self._data_collection.set_name(prefix)
        self._tree_view_item.setText(0, self._data_collection.get_name())

    def _run_number_ledit_change(self, new_value):
        if str(new_value).isdigit():
            self._data_collection.set_number(int(new_value))
            self._tree_view_item.setText(0, self._data_collection.get_name())

    def handle_path_conflict(self):
        if self._tree_view_item:
            dc_tree_widget = self._tree_view_item.listView().parent()
            dc_tree_widget.check_for_path_collisions()
            path_template = self._data_collection.acquisitions[0].path_template
            path_conflict = self.queue_model_hwobj.\
                        check_for_path_collisions(path_template)

            if path_conflict:
                logging.getLogger("user_level_log").\
                    error('The current path settings will overwrite data' +\
                          ' from another task. Correct the problem before collecting')
                Qt4_widget_colors.set_widget_color(widget, Qt4_widget_colors.LIGHT_RED)
            else:
                Qt4_widget_colors.set_widget_color(widget, Qt4_widget_colors.LIGHT_WHITE)

#.........这里部分代码省略.........

class CreateAdvancedWidget(CreateTaskBase):
    """Widget used to create advanced collection methods
    """

    def __init__(self, parent=None,name=None, fl=0):
        CreateTaskBase.__init__(self, parent, name, 
            Qt.WindowFlags(fl), 'Advanced')

        if not name:
            self.setObjectName("create_advanced_widget")

        # Hardware objects ----------------------------------------------------
 
        # Internal variables --------------------------------------------------
        self.init_models()
        self._advanced_methods = None
        self._grid_map = {}
        self.spacing = [0, 0]
        self.dc_selected = False

        # Graphic elements ----------------------------------------------------
        self._advanced_methods_widget = loadUi(os.path.join(\
            os.path.dirname(__file__), "ui_files/Qt4_advanced_methods_layout.ui"))

        self._acq_widget =  AcquisitionWidget(self, "acquisition_widget",
             layout='vertical', acq_params=self._acquisition_parameters,
             path_template=self._path_template)
        self._acq_widget.grid_mode = True

        self._data_path_widget = DataPathWidget(self, 'create_dc_path_widget', 
             data_model = self._path_template, layout = 'vertical')

        # Layout --------------------------------------------------------------
        _main_vlayout = QVBoxLayout(self) 
        _main_vlayout.addWidget(self._advanced_methods_widget)
        _main_vlayout.addWidget(self._acq_widget)
        _main_vlayout.addWidget(self._data_path_widget)
        _main_vlayout.addStretch(0)
        _main_vlayout.setSpacing(6)
        _main_vlayout.setContentsMargins(2, 2, 2, 2)

        # SizePolicies --------------------------------------------------------

        # Qt signal/slot connections ------------------------------------------
        self._acq_widget.acqParametersChangedSignal.\
             connect(self.acq_parameters_changed)
        self._acq_widget.madEnergySelectedSignal.\
             connect(self.mad_energy_selected)

        self._acq_widget.acq_widget_layout.osc_range_ledit.textEdited.connect(\
             self.grid_osc_range_ledit_changed)
        self._acq_widget.acq_widget_layout.osc_total_range_ledit.textEdited.connect(\
             self.grid_osc_total_range_ledit_changed)

        self._data_path_widget.pathTemplateChangedSignal.\
             connect(self.path_template_changed)

        self._advanced_methods_widget.grid_treewidget.itemSelectionChanged.\
             connect(self.grid_treewidget_item_selection_changed)
        self._advanced_methods_widget.draw_grid_button.clicked.\
             connect(self.draw_grid_button_clicked)
        self._advanced_methods_widget.remove_grid_button.clicked.\
             connect(self.remove_grid_button_clicked)
        self._advanced_methods_widget.hor_spacing_ledit.textEdited.\
             connect(self.hor_spacing_changed)
        self._advanced_methods_widget.ver_spacing_ledit.textEdited.\
             connect(self.ver_spacing_changed)

        self._advanced_methods_widget.move_right_button.clicked.\
             connect(lambda : self.move_grid("right"))
        self._advanced_methods_widget.move_left_button.clicked.\
             connect(lambda : self.move_grid("left"))
        self._advanced_methods_widget.move_up_button.clicked.\
             connect(lambda : self.move_grid("up"))
        self._advanced_methods_widget.move_down_button.clicked.\
             connect(lambda : self.move_grid("down"))        
      
        self._advanced_methods_widget.overlay_cbox.toggled.\
             connect(self.overlay_toggled)
        self._advanced_methods_widget.overlay_slider.valueChanged.\
             connect(self.overlay_alpha_changed) 
        self._advanced_methods_widget.overlay_color_button.clicked.\
             connect(self.overlay_change_color)
        self._advanced_methods_widget.move_to_grid_button.clicked.\
             connect(self.move_to_grid)

        # Other ---------------------------------------------------------------
        self._acq_widget.use_osc_start(False)
        self._acq_widget.use_kappa(False) 
        self._acq_widget.acq_widget_layout.num_images_label.setEnabled(False)
        self._acq_widget.acq_widget_layout.num_images_ledit.setEnabled(False)
        for col in range(self._advanced_methods_widget.\
                         grid_treewidget.columnCount()):
            self._advanced_methods_widget.grid_treewidget.\
                 resizeColumnToContents(col)

        self._acq_widget.acq_widget_layout.osc_total_range_label.setText(\
            "Total osc. range per line")
        #self.enable_widgets(False)

#.........这里部分代码省略.........

    def __init__(self, parent = None, name = "energy_scan_tab_widget"):
        QtGui.QWidget.__init__(self, parent)

        if name is not None:
            self.setObjectName(name)

        # Hardware objects ----------------------------------------------------
        self.energy_scan_hwobj = None

        # Internal variables --------------------------------------------------
        self.energy_scan_model = queue_model_objects.EnergyScan()
        self._tree_view_item = None

        # Graphic elements ----------------------------------------------------
        _top_widget = QtGui.QWidget(self) 
        _parameters_widget = QtGui.QWidget(_top_widget)  
        self.periodic_table_widget =  PeriodicTableWidget(_parameters_widget)
        self.data_path_widget = DataPathWidget(_parameters_widget)
        self.data_path_widget.data_path_layout.file_name_label.setText('')
        self.data_path_widget.data_path_layout.file_name_value_label.hide()
        self.snapshot_widget = SnapshotWidget(self)

        self.scan_actual_plot_widget = PymcaPlotWidget(self, True)
        self.scan_result_plot_widget = PymcaPlotWidget(self, False)
        self.chooch_plot_widget = PymcaPlotWidget(self, False)
        #self.scan_actual_plot_widget = TwoAxisPlotWidget(self, True)
        #self.chooch_plot_widget = TwoAxisPlotWidget(self, False)
 
        # Layout -------------------------------------------------------------
        _parameters_widget_layout = QtGui.QVBoxLayout()
        _parameters_widget_layout.addWidget(self.periodic_table_widget)
        _parameters_widget_layout.addWidget(self.data_path_widget)
        _parameters_widget_layout.addStretch(0)
        _parameters_widget_layout.setSpacing(2)
        _parameters_widget_layout.setContentsMargins(0, 0, 0, 0)
        _parameters_widget.setLayout(_parameters_widget_layout)

        _top_widget_hlayout = QtGui.QHBoxLayout(self)
        _top_widget_hlayout.addWidget(_parameters_widget)
        _top_widget_hlayout.addWidget(self.snapshot_widget)
        _top_widget_hlayout.addStretch(0)
        _top_widget_hlayout.setSpacing(2)
        _top_widget_hlayout.setContentsMargins(0, 0, 0, 0)
        _top_widget.setLayout(_top_widget_hlayout) 

        _main_vlayout = QtGui.QVBoxLayout(self)
        _main_vlayout.addWidget(_top_widget)
        _main_vlayout.addWidget(self.scan_actual_plot_widget)
        _main_vlayout.addWidget(self.scan_result_plot_widget)
        _main_vlayout.addWidget(self.chooch_plot_widget)
        _main_vlayout.setSpacing(5)
        _main_vlayout.setContentsMargins(2, 2, 2, 2)
        #_main_vlayout.addStretch(0)

        self.setLayout(_main_vlayout)
      
        # SizePolicies --------------------------------------------------------
        self.scan_actual_plot_widget.setSizePolicy(QtGui.QSizePolicy.Fixed,
                                            QtGui.QSizePolicy.Expanding)
        self.chooch_plot_widget.setSizePolicy(QtGui.QSizePolicy.Fixed,
                                              QtGui.QSizePolicy.Expanding)

        # Qt signal/slot connections ------------------------------------------
        #qt.QObject.connect(self.periodic_table_widget, qt.PYSIGNAL('edgeSelected'), 
        #                   self.element_clicked)

        self.data_path_widget.data_path_layout.prefix_ledit.\
             textChanged.connect(self._prefix_ledit_change)

        self.data_path_widget.data_path_layout.run_number_ledit.\
             textChanged.connect(self._run_number_ledit_change)
        
        # Other ---------------------------------------------------------------
        self.scan_actual_plot_widget.hide()
        self.scan_result_plot_widget.hide()

class DCParametersWidget(QtGui.QWidget):
    def __init__(self, parent = None, name = "parameter_widget"):

        QtGui.QWidget.__init__(self, parent)
        if name is not None:
            self.setObjectName(name) 

        # Properties ----------------------------------------------------------

        # Signals ------------------------------------------------------------

        # Slots ---------------------------------------------------------------

        # Hardware objects ----------------------------------------------------
        self._beamline_setup_hwobj = None

        # Internal variables --------------------------------------------------
        self._data_collection = None
        self.add_dc_cb = None
        self._tree_view_item = None

        # Graphic elements ----------------------------------------------------
        _dc_parameters_widget = QtGui.QWidget(self)
        self._data_path_widget = DataPathWidget(_dc_parameters_widget)
        self._acq_widget = AcquisitionWidget(_dc_parameters_widget, 
                                            layout = 'horizontal')
        #self._acq_widget.setFixedHeight(170)
        self._processing_widget = ProcessingWidget(_dc_parameters_widget)
        _snapshot_widget = QtGui.QWidget(self)
        self.position_widget = uic.loadUi(os.path.join(os.path.dirname(__file__),
                                          'ui_files/Qt4_snapshot_widget_layout.ui'))
        
        # Layout --------------------------------------------------------------
        _dc_parameters_widget_layout = QtGui.QVBoxLayout(_dc_parameters_widget)
        _dc_parameters_widget_layout.addWidget(self._data_path_widget)
        _dc_parameters_widget_layout.addWidget(self._acq_widget)
        _dc_parameters_widget_layout.addWidget(self._processing_widget)
        _dc_parameters_widget_layout.setContentsMargins(0, 0, 0, 0)
        _dc_parameters_widget_layout.setSpacing(2)
        _dc_parameters_widget_layout.addStretch(0)

        _snapshots_vlayout = QtGui.QVBoxLayout(_snapshot_widget)
        _snapshots_vlayout.addWidget(self.position_widget)
        _snapshots_vlayout.setContentsMargins(0, 0, 0, 0)
        _snapshots_vlayout.setSpacing(2)
        _snapshots_vlayout.addStretch(10)

        _main_hlayout = QtGui.QHBoxLayout(self)
        _main_hlayout.addWidget(_dc_parameters_widget)
        _main_hlayout.addWidget(_snapshot_widget)
        _main_hlayout.setContentsMargins(0, 0, 0, 0)
        _main_hlayout.setSpacing(2)
        _main_hlayout.addStretch(0)

        # SizePolicies --------------------------------------------------------
        

        # Qt signal/slot connections ------------------------------------------
        self._data_path_widget.data_path_layout.prefix_ledit.textChanged.connect(
                     self._prefix_ledit_change)
        self._data_path_widget.data_path_layout.run_number_ledit.textChanged.connect( 
                     self._run_number_ledit_change)
        self._acq_widget.madEnergySelectedSignal.connect(self.mad_energy_selected)
        self._acq_widget.acqParametersChangedSignal.connect(\
             self.acq_parameters_changed)

        # Other ---------------------------------------------------------------

    def set_beamline_setup(self, bl_setup):
        self._acq_widget.set_beamline_setup(bl_setup)
        self._beamline_setup_hwobj = bl_setup

    def _prefix_ledit_change(self, new_value):
        prefix = self._data_collection.acquisitions[0].\
                 path_template.get_prefix()
        self._data_collection.set_name(prefix)
        self._tree_view_item.setText(0, self._data_collection.get_name())

    def _run_number_ledit_change(self, new_value):
        if str(new_value).isdigit():
            self._data_collection.set_number(int(new_value))
            self._tree_view_item.setText(0, self._data_collection.get_name())

    def acq_parameters_changed(self):
        if self._tree_view_item is None:
            #TODO fix this
            return 
        dc_tree_widget = self._tree_view_item.listView().parent()
        dc_tree_widget.check_for_path_collisions()
        path_template = self._data_collection.acquisitions[0].path_template
        path_conflict = self.queue_model_hwobj.\
                        check_for_path_collisions(path_template)
        if new_value != '':
            if path_conflict:
                logging.getLogger("user_level_log").\
                    error('The current path settings will overwrite data' +\
                          ' from another task. Correct the problem before collecting')

                widget.setPaletteBackgroundColor(widget_colors.LIGHT_RED)
            else:
#.........这里部分代码省略.........

    def __init__(self, parent = None, name = "xrf_scan_tab_widget"):
        QtGui.QWidget.__init__(self, parent)

        if name is not None:
            self.setObjectName(name)

        # Hardware objects ----------------------------------------------------
        self.xrf_scan_hwobj = None

        # Internal variables --------------------------------------------------
        self.xrf_scan_model = queue_model_objects.XRFScan()
        self._tree_view_item = None

        # Graphic elements ----------------------------------------------------
        _top_widget = QtGui.QWidget(self)
        _parameters_widget = QtGui.QWidget(_top_widget)
        self.data_path_widget = DataPathWidget(_parameters_widget)
        self.other_parameters_gbox = QtGui.QGroupBox("Other parameters", _parameters_widget) 
        self.count_time_label = QtGui.QLabel("Count time:", 
                                             self.other_parameters_gbox)
	self.count_time_ledit = QtGui.QLineEdit(self.other_parameters_gbox)
	self.count_time_ledit.setFixedWidth(50)
        self.adjust_transmission_cbox = QtGui.QCheckBox("Adjust transmission", \
             self.other_parameters_gbox)
        self.adjust_transmission_cbox.hide()
        _snapshot_widget = QtGui.QWidget(self)
        self.position_widget = uic.loadUi(os.path.join(os.path.dirname(__file__),
                                          'ui_files/Qt4_snapshot_widget_layout.ui'))
        self.mca_spectrum_widget = McaSpectrumWidget(self)
 
        # Layout -------------------------------------------------------------
        _other_parameters_gbox_hlayout = QtGui.QHBoxLayout(self.other_parameters_gbox)
        _other_parameters_gbox_hlayout.addWidget(self.count_time_label)  
        _other_parameters_gbox_hlayout.addWidget(self.count_time_ledit)
        _other_parameters_gbox_hlayout.addWidget(self.adjust_transmission_cbox)
        _other_parameters_gbox_hlayout.addStretch(0)
        _other_parameters_gbox_hlayout.setSpacing(2)
        _other_parameters_gbox_hlayout.setContentsMargins(3, 3, 3, 3)

        _parameters_widget_layout = QtGui.QVBoxLayout(_parameters_widget)
        _parameters_widget_layout.addWidget(self.data_path_widget)
        _parameters_widget_layout.addWidget(self.other_parameters_gbox)
        _parameters_widget_layout.addStretch(0)
        _parameters_widget_layout.setSpacing(2)
        _parameters_widget_layout.setContentsMargins(0, 0, 0, 0)

        _snapshots_vlayout = QtGui.QVBoxLayout(_snapshot_widget)
        _snapshots_vlayout.addWidget(self.position_widget)
        _snapshots_vlayout.setContentsMargins(0, 0, 0, 0)
        _snapshots_vlayout.setSpacing(2)
        _snapshots_vlayout.addStretch(0)

        _top_widget_layout = QtGui.QHBoxLayout(_top_widget)
        _top_widget_layout.addWidget(_parameters_widget)
        _top_widget_layout.addWidget(_snapshot_widget)
        _top_widget_layout.setSpacing(2)
        _top_widget_layout.setContentsMargins(0, 0, 0, 0)
        
        _main_vlayout = QtGui.QVBoxLayout(self)
        _main_vlayout.addWidget(_top_widget)
        _main_vlayout.addWidget(self.mca_spectrum_widget)
        _main_vlayout.setSpacing(2)
        _main_vlayout.setContentsMargins(0, 0, 0, 0)
       
        # SizePolicies -------------------------------------------------------
        self.position_widget.setFixedSize(457, 350)
        self.mca_spectrum_widget.setSizePolicy(QtGui.QSizePolicy.Expanding,
                                               QtGui.QSizePolicy.Expanding)
        _top_widget.setSizePolicy(QtGui.QSizePolicy.Expanding,
                                  QtGui.QSizePolicy.Fixed)

        # Qt signal/slot connections ------------------------------------------ 
        self.data_path_widget.data_path_layout.prefix_ledit.\
             textChanged.connect(self._prefix_ledit_change)

        self.data_path_widget.data_path_layout.run_number_ledit.\
             textChanged.connect(self._run_number_ledit_change)

        self.count_time_ledit.textChanged.connect(self._count_time_ledit_change)
        
        # Other ---------------------------------------------------------------
        Qt4_widget_colors.set_widget_color(self.other_parameters_gbox,
                                           Qt4_widget_colors.GROUP_BOX_GRAY)
        Qt4_widget_colors.set_widget_color(self.data_path_widget,
                                           Qt4_widget_colors.GROUP_BOX_GRAY) 
        Qt4_widget_colors.set_widget_color(self.position_widget, 
                                           Qt4_widget_colors.GROUP_BOX_GRAY)

    def __init__(self, parent=None,name=None, fl=0):
        CreateTaskBase.__init__(self, parent, name, 
            Qt.WindowFlags(fl), 'XrayImaging')

        if not name:
            self.setObjectName("create_xray_imaging_widget")

        # Hardware objects ----------------------------------------------------
 
        # Internal variables --------------------------------------------------
        self._xray_imaging_parameters = None
        self._processing_parameters = None
        self.init_models()

        # Graphic elements ----------------------------------------------------
        self._xray_imaging_parameters_widget = XrayImagingParametersWidget(\
             self, 'xray_imaging_widget',
             xray_imaging_params=self._xray_imaging_parameters)

        self._acq_widget =  AcquisitionWidget(self, "acquisition_widget",
             layout='vertical', acq_params=self._acquisition_parameters,
             path_template=self._path_template)
        self._acq_widget.grid_mode = False

        self._data_path_widget = DataPathWidget(self, 'create_dc_path_widget', 
             data_model=self._path_template, layout='vertical')

        # Layout --------------------------------------------------------------
        _main_vlayout = QVBoxLayout(self)
        _main_vlayout.addWidget(self._xray_imaging_parameters_widget)
        _main_vlayout.addWidget(self._acq_widget)
        _main_vlayout.addWidget(self._data_path_widget)
        _main_vlayout.addStretch(0)
        _main_vlayout.setSpacing(6)
        _main_vlayout.setContentsMargins(2, 2, 2, 2)

        # SizePolicies --------------------------------------------------------

        # Qt signal/slot connections ------------------------------------------
        self._acq_widget.acqParametersChangedSignal.\
             connect(self.acq_parameters_changed)
        self._data_path_widget.pathTemplateChangedSignal.\
             connect(self.path_template_changed)

        # Other ---------------------------------------------------------------
        self._acq_widget.use_osc_start(False)
        self._acq_widget.use_kappa(False)
        self._acq_widget.acq_widget_layout.max_osc_range_cbx.setVisible(False)
        self._acq_widget.acq_widget_layout.first_image_label.setVisible(False)
        self._acq_widget.acq_widget_layout.first_image_ledit.setVisible(False)
        self._acq_widget.acq_widget_layout.detector_roi_mode_label.setVisible(False)
        self._acq_widget.acq_widget_layout.detector_roi_mode_combo.setVisible(False)
        self._acq_widget.acq_widget_layout.energies_combo.setVisible(False)
        self._acq_widget.acq_widget_layout.mad_cbox.setVisible(False)
        self._acq_widget.acq_widget_layout.energy_label.setVisible(False)
        self._acq_widget.acq_widget_layout.energy_ledit.setVisible(False)
        self._acq_widget.acq_widget_layout.transmission_label.setVisible(False)
        self._acq_widget.acq_widget_layout.transmission_ledit.setVisible(False)
        self._acq_widget.acq_widget_layout.resolution_label.setVisible(False)
        self._acq_widget.acq_widget_layout.resolution_ledit.setVisible(False)
        self._acq_widget.acq_widget_layout.kappa_label.setVisible(False)
        self._acq_widget.acq_widget_layout.kappa_ledit.setVisible(False)
        self._acq_widget.acq_widget_layout.kappa_phi_label.setVisible(False)
        self._acq_widget.acq_widget_layout.kappa_phi_ledit.setVisible(False)
        self._acq_widget.acq_widget_layout.shutterless_cbx.setVisible(False)

    def __init__(self, parent=None, name="energy_scan_tab_widget"):
        QtGui.QWidget.__init__(self, parent)

        if name is not None:
            self.setObjectName(name)

        # Hardware objects ----------------------------------------------------

        # Internal variables --------------------------------------------------
        self.energy_scan_model = queue_model_objects.EnergyScan()
        self._tree_view_item = None

        # Graphic elements ----------------------------------------------------
        _top_widget = QtGui.QWidget(self)
        _parameters_widget = QtGui.QWidget(_top_widget)
        self.periodic_table_widget = PeriodicTableWidget(_parameters_widget)
        self.data_path_widget = DataPathWidget(_parameters_widget)
        self.data_path_widget.data_path_layout.file_name_label.setText("")
        self.data_path_widget.data_path_layout.file_name_value_label.hide()
        self.position_widget = uic.loadUi(
            os.path.join(os.path.dirname(__file__), "ui_files/Qt4_snapshot_widget_layout.ui")
        )
        self.position_widget.setFixedSize(450, 340)

        self.scan_plot_widget = TwoAxisPlotWidget(self)
        self.scan_plot_widget.set_real_time_plot(True)
        self.result_plot_widget = TwoAxisPlotWidget(self)

        """self.scan_plot_widget = ScanPlotWidget(self)
        self.scan_plot_widget.setRealTimePlot(True)
        self.result_plot_widget = ScanPlotWidget(self)
        self.result_plot_widget.setRealTimePlot(False)
        self.scan_plot_widget.setFixedHeight(200)
        self.result_plot_widget.setFixedHeight(200)"""

        # Layout -------------------------------------------------------------
        _parameters_widget_layout = QtGui.QVBoxLayout()
        _parameters_widget_layout.addWidget(self.periodic_table_widget)
        _parameters_widget_layout.addWidget(self.data_path_widget)
        _parameters_widget_layout.addStretch(0)
        _parameters_widget_layout.setSpacing(2)
        _parameters_widget_layout.setContentsMargins(0, 0, 0, 0)
        _parameters_widget.setLayout(_parameters_widget_layout)

        _top_widget_hlayout = QtGui.QHBoxLayout(self)
        _top_widget_hlayout.addWidget(_parameters_widget)
        _top_widget_hlayout.addWidget(self.position_widget)
        _top_widget_hlayout.addStretch(0)
        _top_widget_hlayout.setSpacing(2)
        _top_widget_hlayout.setContentsMargins(0, 0, 0, 0)
        _top_widget.setLayout(_top_widget_hlayout)

        _main_vlayout = QtGui.QVBoxLayout(self)
        _main_vlayout.addWidget(_top_widget)
        _main_vlayout.addWidget(self.scan_plot_widget)
        _main_vlayout.addWidget(self.result_plot_widget)
        _main_vlayout.setSpacing(2)
        _main_vlayout.setContentsMargins(2, 2, 2, 2)
        _main_vlayout.addStretch(0)

        self.setLayout(_main_vlayout)

        # SizePolicies --------------------------------------------------------

        # Qt signal/slot connections ------------------------------------------
        # qt.QObject.connect(self.periodic_table_widget, qt.PYSIGNAL('edgeSelected'),
        #                   self.element_clicked)

        self.data_path_widget.data_path_layout.prefix_ledit.textChanged.connect(self._prefix_ledit_change)

        self.data_path_widget.data_path_layout.run_number_ledit.textChanged.connect(self._run_number_ledit_change)

        # qt.QObject.connect(qt.qApp, qt.PYSIGNAL('tab_changed'),
        #                   self.tab_changed)

        # Other ---------------------------------------------------------------

        Qt4_widget_colors.set_widget_color(self.periodic_table_widget, Qt4_widget_colors.GROUP_BOX_GRAY)
        Qt4_widget_colors.set_widget_color(self.position_widget, Qt4_widget_colors.GROUP_BOX_GRAY)
        Qt4_widget_colors.set_widget_color(self.data_path_widget, Qt4_widget_colors.GROUP_BOX_GRAY)