Python NavigationToolbar2QT.show方法代碼示例

# 需要導入模塊: from matplotlib.backends.backend_qt4 import NavigationToolbar2QT [as 別名]
# 或者: from matplotlib.backends.backend_qt4.NavigationToolbar2QT import show [as 別名]
class PylabPlotter(GriddedPlugin):
    """ a class to visualize data from external pylab graphics files """

    _icon = pixmaps.bars3d
    viewer_name = "Pylab Plotter"

    def is_viewable(data):
        return len(data) > 0

    is_viewable = staticmethod(is_viewable)

    def __init__(self, gw, dataitem, cellspec={}, **opts):
        GriddedPlugin.__init__(self, gw, dataitem, cellspec=cellspec)
        """ a plugin for showing pylab plots """

        self._rec = None
        self._wtop = None
        self.dataitem = dataitem
        self.png_number = 0
        self.data_list = []
        self.data_list_labels = []
        self.data_list_length = 0
        self.max_list_length = 50
        self.layout_created = False
        self.counter = -1

        self.reset_plot_stuff()

        # back to 'real' work
        if dataitem and dataitem.data is not None:
            self.set_data(dataitem)

    def reset_plot_stuff(self):
        """ resets widgets to None. Needed if we have been putting
        out a message about Cache not containing results, etc
    """
        self._pylab_plotter = None
        self._toolbar = None
        self.results_selector = None
        self.status_label = None
        self.layout_parent = None
        self.layout = None

    def wtop(self):
        """ function needed by Oleg for reasons known only to him! """
        return self._wtop

    def create_layout_stuff(self):
        """ create grid layouts into which plotter widgets are inserted """
        if self.layout_parent is None or not self.layout_created:
            self.layout_parent = Qt.QWidget(self.wparent())
            self.layout = Qt.QGridLayout(self.layout_parent)
            self.set_widgets(self.layout_parent, self.dataitem.caption, icon=self.icon())
            self.layout_created = True
        self._wtop = self.layout_parent

    def set_data(self, dataitem, default_open=None, **opts):
        """ this callback receives data from the meqbrowser, when the
        user has requested a plot. It decides whether the data is
        from a VellSet or visu data record, and  after any
        necessary preprocssing forwards the data to one of
        the functions which does the actual plotting """

        _dprint(3, "** in pylab_plotter:set_data callback")

        if not has_pylab:
            Message = "Matplotlib does not appear to be installed so no plot can be made."
            cache_message = Qt.QLabel(Message, self.wparent())
            #     cache_message.setTextFormat(Qt.RichText)
            self._wtop = cache_message
            self.set_widgets(cache_message)
            self.reset_plot_stuff()
            return

        self._rec = dataitem.data
        _dprint(3, "set_data: initial self._rec ", self._rec)
        # if we are single stepping through requests, Oleg may reset the
        # cache, so check for a non-data record situation
        if self._rec is None:
            return
        if isinstance(self._rec, bool):
            return

        self.label = ""
        # extra label, filled in if possible
        # there's a problem here somewhere ...
        if dmi_typename(self._rec) != "MeqResult":  # data is not already a result?
            # try to put request ID in label
            rq_id_found = False
            data_failure = False
            try:
                if self._rec.cache.has_key("request_id"):
                    self.label = "rq " + str(self._rec.cache.request_id)
                    rq_id_found = True
                if self._rec.cache.has_key("result"):
                    self._rec = self._rec.cache.result
                    # look for cache.result record
                    if not rq_id_found and self._rec.has_key("request_id"):
                        self.label = "rq " + str(self._rec.request_id)
                else:
#.........這裏部分代碼省略.........