backtrader.bokeh.tabs.source 源代码

#!/usr/bin/env python
"""
Source code tab.

Displays strategy source code.
"""

import inspect

from ..tab import BokehTab

try:
    from bokeh.layouts import column
    from bokeh.models.widgets import Div, PreText

    BOKEH_AVAILABLE = True
except ImportError:
    BOKEH_AVAILABLE = False




class SourceTab(BokehTab):
    """Source code tab.

    Displays the strategy's Python source code.
    """

    def _is_useable(self):
        """Useable when strategy exists."""
        if not BOKEH_AVAILABLE:
            return False
        return self.strategy is not None

    def _get_panel(self):
        """Get panel content.

        Returns:
            tuple: (widget, title)
        """
        strategy = self.strategy
        scheme = self.scheme

        widgets = []

        # Get theme colors
        title_color = scheme.text_color if scheme else "#333"

        # Title
        widgets.append(
            Div(
                text=f'<h3 style="color: {title_color};">Strategy Source Code</h3>',
                sizing_mode="stretch_width",
            )
        )

        # Get source code
        try:
            source_code = inspect.getsource(strategy.__class__)
        except (TypeError, OSError):
            source_code = "# Source code not available"

        # Create source code display component
        source_pre = PreText(
            text=source_code,
            width=800,
            height=500,
        )
        widgets.append(source_pre)

        content = column(*widgets, sizing_mode="stretch_width")
        return content, "Source"