Python bokeh.models.widgets.Button() Examples

def __init__(self, doc: Document, push_fnc, bokeh_fac: callable, push_data_fnc:callable, strategy: bt.Strategy, figurepage_idx: int = 0, lookback: int = 20):
        self._slider_aspectratio = None
        self._push_data_fnc = push_data_fnc
        self._push_fnc = push_fnc
        self._figurepage_idx = figurepage_idx
        self.last_data_index = -1
        self._lookback = lookback
        self._strategy = strategy
        self._current_group = None
        self.document = doc

        self._bokeh_fac = bokeh_fac
        self._bokeh = None

        bokeh = self._bokeh_fac()  # temporary bokeh object to get tradingdomains and scheme
        self._scheme = copy(bokeh.p.scheme)  # preserve original scheme as originally provided by the user

        tradingdomains = bokeh.list_tradingdomains(strategy)
        self._current_group = tradingdomains[0]
        self._select_tradingdomain = Select(value=self._current_group, options=tradingdomains)
        self._select_tradingdomain.on_change('value', self._on_select_group)

        btn_refresh_analyzers = Button(label='Refresh Analyzers', width=100)
        btn_refresh_analyzers.on_click(self._on_click_refresh_analyzers)

        td_label = Div(text="Trading Domain:", margin=(9, 5, 15, 5))
        controls = row(children=[td_label, self._select_tradingdomain, btn_refresh_analyzers])
        self.model = column(children=[controls, Tabs(tabs=[])], sizing_mode=self._scheme.plot_sizing_mode)

        # append meta tab
        meta = Div(text=metadata.get_metadata_div(strategy))
        self._panel_metadata = Panel(child=meta, title="Meta")

        self._refreshmodel() 

def _get_config_panel(self):
        def on_change_checkbox(vals):
            for i, f in enumerate(self._bokeh.figurepages[0].figure_envs):
                if i > 1:
                    continue
                f.figure.visible = i in vals

        self._slider_aspectratio = Slider(value=self._scheme.plotaspectratio, start=0.1, end=10.0, step=0.1)

        button = Button(label="Save", button_type="success")
        button.on_click(self.on_button_save_config)

        r1 = row(children=[Div(text='Aspect Ratio', margin=(15, 10, 0, 10)), self._slider_aspectratio])

        return Panel(child=column(children=[r1, button]), title='Config') 

def build_widgets_wb(stock_list):
    # CODE SECTION: setup widgets, widgetbox name = controls_wb
    WIDGET_WIDTH = 250

    # ========== Select Stocks ============= #
    select_stk_1 = Select(width = WIDGET_WIDTH, title='Select Stock 1:', value = stock_list[0], options=stock_list)
    select_stk_2 = Select(width = WIDGET_WIDTH, title='Select Stock 2:', value = stock_list[0], options=stock_list)

    # ========== Strategy Type ============= #
    strategy_list = ['kalman', 'distance', 'cointegration']
    select_strategy = Select(width = WIDGET_WIDTH, title='Select Strategy:', value = strategy_list[0], options=strategy_list)

    # ========== set start/end date ============= #
    # date time variables
    MAX_START = date(2014, 1, 1)
    MAX_END = date(2018, 12, 30)
    DEFAULT_START = date(2016, 5, 1)
    DEFAULT_END = date(2016, 12, 31)
    STEP = 1

    backtest_dates = DateRangeSlider(width = WIDGET_WIDTH, 
                                     start=MAX_START, end=MAX_END, 
                                     value=(DEFAULT_START, DEFAULT_END), 
                                     step=STEP, title="Backtest Date Range:")

    start_bt = Button(label="Backtest", button_type="success", width = WIDGET_WIDTH)

    # controls = column(select_stk_1, select_stk_2, select_strategy, backtest_dates, start_bt)
    controls_wb = widgetbox(select_stk_1, select_stk_2, select_strategy, backtest_dates, start_bt, width=600)
    return controls_wb 

def build_widgets_wb(stock_list, metrics):
    # CODE SECTION: setup buttons, widgetbox name = controls_wb
    WIDGET_WIDTH = 250

    # ========== Select Stocks ============= #
    select_stk_1 = Select(width = WIDGET_WIDTH, title='Select Stock 1:', value = backtest_params["stk_0"], options=stock_list)
    select_stk_2 = Select(width = WIDGET_WIDTH, title='Select Stock 2:', value = backtest_params["stk_1"], options=stock_list)

    # ========== Strategy Type ============= #
    strategy_list = ['kalman', 'distance', 'cointegration', 'reinforcement learning']
    select_strategy = Select(width = WIDGET_WIDTH, title='Select Strategy:', value = backtest_params["strategy_type"], options=strategy_list)

    # ========== set start/end date ============= #
    # date time variables
    MAX_START = datetime.strptime(backtest_params["max_start"], "%Y-%m-%d").date()
    MAX_END = datetime.strptime(backtest_params["max_end"], "%Y-%m-%d").date()
    DEFAULT_START = datetime.strptime(backtest_params["backtest_start"], "%Y-%m-%d").date()
    DEFAULT_END = datetime.strptime(backtest_params["backtest_end"], "%Y-%m-%d").date()
    STEP = 1

    backtest_dates = DateRangeSlider(width = WIDGET_WIDTH, 
                                     start=MAX_START, end=MAX_END, 
                                     value=(DEFAULT_START, DEFAULT_END), 
                                     step=STEP, title="Backtest Date Range:")

    start_bt = Button(label="Backtest", button_type="success", width = WIDGET_WIDTH)

    # controls = column(select_stk_1, select_stk_2, select_strategy, backtest_dates, start_bt)
    controls_wb = widgetbox(select_stk_1, select_stk_2, select_strategy, backtest_dates, start_bt, width=300)

    # CODE SECTION: setup table, widgetbox name = metrics_wb
    master_wb = None
    if metrics is not None:
        metric_source = ColumnDataSource(metrics)
        metric_columns = [
            TableColumn(field="Metrics", title="Metrics"),
            TableColumn(field="Value", title="Performance"),
        ]

        metric_table = DataTable(source=metric_source, columns=metric_columns, width=300)
        master_wb = row(controls_wb, widgetbox(metric_table))
        
    else:
        logging.info("creating controls without table")
        master_wb = row(controls_wb)
    return master_wb, select_stk_1, select_stk_2, select_strategy, backtest_dates, start_bt 

def widgets(self):
        """Return name,widget boxes for all parameters (i.e., a property sheet)"""

        params = self.parameterized.params().items()
        key_fn = lambda x: x[1].precedence if x[1].precedence is not None else self.p.default_precedence
        sorted_precedence = sorted(params, key=key_fn)
        outputs = [k for k, p in sorted_precedence if isinstance(p, _View)]
        filtered = [(k,p) for (k,p) in sorted_precedence
                    if ((p.precedence is None) or (p.precedence >= self.p.display_threshold))
                    and k not in outputs]
        groups = itertools.groupby(filtered, key=key_fn)
        sorted_groups = [sorted(grp) for (k,grp) in groups]
        ordered_params = [el[0] for group in sorted_groups for el in group]

        # Format name specially
        ordered_params.pop(ordered_params.index('name'))
        widgets = [Div(text='<b>{0}</b>'.format(self.parameterized.name))]

        def format_name(pname):
            p = self.parameterized.params(pname)
            # omit name for buttons, which already show the name on the button
            name = "" if issubclass(type(p),param.Action) else pname
            return Div(text=name)

        if self.p.show_labels:
            widgets += [self.widget(pname) for pname in ordered_params]
        else:
            widgets += [self.widget(pname) for pname in ordered_params]

        if self.p.button and not (self.p.callback is None and self.p.next_n==0):
            display_button = Button(label=self.p.button_text)
            def click_cb():
                # Execute and clear changes since last button press
                try:
                    self.execute(self._changed)
                except Exception as e:
                    self._changed.clear()
                    raise e
                self._changed.clear()
            display_button.on_click(click_cb)
            widgets.append(display_button)

        outputs = [self.widget(pname) for pname in outputs]
        return widgets, outputs