laydi/system/navigator.py

import gtk
import gobject
import plots
import logger
import dataset
import project

class NavigatorView (gtk.TreeView):
    def __init__(self, project, app):
        self.project = project
        self.data_tree = project.data_tree
        self.app = app
        
        gtk.TreeView.__init__(self, self.data_tree)

        self.set_headers_visible(False)
        self.connect('cursor_changed', self.cursor_changed_handler)
        self.connect('row_activated', self.row_activated_handler)

        renderer = gtk.CellRendererText()
        self.object_col = gtk.TreeViewColumn('Object', renderer, text=0)
        self.append_column(self.object_col)

        logger.log('debug', 'Initializing navigator window.')

    def cursor_changed_handler(self, widget):
        selection = widget.get_selection()
        model, tree_iter = selection.get_selected()
        obj = self.data_tree.get_value(tree_iter, 2)
        
        if isinstance(obj, dataset.Dataset):
            logger.log('debug', 'Selecting dataset')
            self.project.set_current_data(obj)
        elif not isinstance(obj, plots.Plot):
            t = type(obj)
            logger.log('debug', 'Selected datatype was %s. Don\'t know what to do.' % t)

    def display_data_info(self, data):
        dims = []
        for name in data.get_dim_names():
            dims.append((name, data.dims[data._dim_num[name]]))
        
        dim_text = ", ".join(["%s (%d)" % dim for dim in dims])

        text = """<span weight="bold">Data:</span> %s

<span weight="bold">Dimensions:</span> %s""" % (data.get_name(), dim_text)

        d = gtk.MessageDialog(flags=(gtk.DIALOG_MODAL | gtk.DIALOG_DESTROY_WITH_PARENT),
                              buttons=gtk.BUTTONS_OK)
        d.set_markup(text)
        d.set_default_response(gtk.BUTTONS_OK)
        d.run()
        d.destroy()        

    def row_activated_handler(self, widget, path, column):
        tree_iter = self.data_tree.get_iter(path)
        obj = self.data_tree.get_value(tree_iter, 2)
        
        if isinstance(obj, plots.Plot):
            logger.log('debug', 'Activating plot')
            self.app.change_plot(obj)
        elif isinstance(obj, dataset.Dataset):
            self.display_data_info(obj)
        else:
            t = type(obj)
            logger.log('debug', 'Activated datatype was %s. Don\'t know what to do.' % t)