dashboard.py

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from python_qt_binding.QtCore import QSize
from python_qt_binding.QtGui import QToolBar
from qt_gui.plugin import Plugin


class Dashboard(Plugin):
    """
    Base class from which dashboards should inherit.

    :param context: the plugin context
    :type context: qt_gui.plugin.Plugin
    """
    def __init__(self, context):
        super(Dashboard, self).__init__(context)
        self.context = context
        self.setup(context)

        if not hasattr(self, 'name'):
            self.name = 'Dashboard'
        if not hasattr(self, 'max_icon_size'):
            self.max_icon_size = QSize(50, 30)
        self._main_widget = QToolBar()
        self._main_widget.setIconSize(self.max_icon_size)
        self._main_widget.setObjectName(self.name)
        self._main_widget.setWindowTitle(self.name)
        if context.serial_number() > 1:
            self._main_widget.setWindowTitle(self._main_widget.windowTitle() + (' (%d)' % context.serial_number()))
        widgets = self.get_widgets()

        self._widgets = []
        for v in widgets:
            for i in v:
                try:
                    self._main_widget.addWidget(i)
                    self._widgets.append(i)
                except:
                    raise Exception("All widgets must be a subclass of QWidget!")

            self._main_widget.addSeparator()

        # Display the dashboard
        context.add_toolbar(self._main_widget)

    def setup(self, context):
        """
        Called during ``__init__`` Subclasses should do initialization here.

        NOTE when overriding this method you should provide a ``self.name`` to
        avoid naming conflicts.

        :param context: The plugin context
        :type context: qt_gui.plugin.Plugin
        """
        pass

    def shutdown_plugin(self):
        """
        Called when the toolbar is closed by Qt.
        """
        for widget in self._widgets:
            if hasattr(widget, 'shutdown_widget'):
                widget.shutdown_widget()
            if hasattr(widget, 'close'):
                widget.close()

        self.shutdown_dashboard()

    def shutdown_dashboard(self):
        """
        Called after shutdown plugin, subclasses should do cleanup here, not in shutdown_plugin
        """
        pass

    def get_widgets(self):
        """
        Most of the dashboard customization should be done here.
        If this function is not overriden the dashboard will display nothing.

        :returns: List of lists containing dashboard widgets.
        """
        return []