Python bokeh.models.widgets.TextInput() Examples

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Example #1
Source File: __init__.py    From parambokeh with BSD 3-Clause "New" or "Revised" License 4 votes vote down vote up 
def change_event(self):
        if not self._queue:
            self._active = False
            return
        w, p_obj, p_name, attr, old, new_values = self._queue[-1]
        self._queue = []

        error = False
        # Apply literal evaluation to values
        if (isinstance(w, TextInput) and isinstance(p_obj, literal_params)):
            try:
                new_values = ast.literal_eval(new_values)
            except:
                error = 'eval'

        if p_name in self._widget_options:
            mapping = self._widget_options[p_name]
            if isinstance(new_values, list):
                new_values = [mapping[el] for el in new_values]
            else:
                new_values = mapping.get(new_values, new_values)

        if isinstance(p_obj, param.Range):
            new_values = tuple(new_values)

        if isinstance(w, CheckboxGroup):
            new_values = True if (len(new_values)>0 and new_values[0]==0) else False

        # If no error during evaluation try to set parameter
        if not error:
            try:
                setattr(self.parameterized, p_name, new_values)
            except ValueError:
                error = 'validation'

        # Style widget to denote error state
        # apply_error_style(w, error)

        if not error and not self.p.button:
            self.execute({p_name: new_values})
        else:
            self._changed[p_name] = new_values

        # document.hold() must have been done already? because this seems to work
        if self.p.mode == 'notebook' and self.p.push and self.document._held_events:
            self._send_notebook_diff()
        self._active = False