Python plotly.graph_objs.Annotation() Examples

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Example #1
Source File: renderer.py    From lddmm-ot with MIT License 4 votes vote down vote up 
def draw_title(self, **props):
        """Add a title to the current subplot in layout dictionary.

        If there exists more than a single plot in the figure, titles revert
        to 'page'-referenced annotations.

        props.keys() -- [
        'text',         (actual content string, not the text obj)
        'position',     (an x, y pair, not an mpl Bbox)
        'coordinates',  ('data', 'axes', 'figure', 'display')
        'text_type',    ('title', 'xlabel', or 'ylabel')
        'style',        (style dict, see below)
        'mplobj'        (actual mpl text object)
        ]

        props['style'].keys() -- [
        'alpha',        (opacity of text)
        'fontsize',     (size in points of text)
        'color',        (hex color)
        'halign',       (horizontal alignment, 'left', 'center', or 'right')
        'valign',       (vertical alignment, 'baseline', 'center', or 'top')
        'rotation',
        'zorder',       (precedence of text when stacked with other objs)
        ]

        """
        self.msg += "        Attempting to draw a title\n"
        if len(self.mpl_fig.axes) > 1:
            self.msg += "          More than one subplot, adding title as " \
                        "annotation\n"
            x_px, y_px = props['mplobj'].get_transform().transform(props[
                'position'])
            x, y = mpltools.display_to_paper(x_px, y_px,
                                             self.plotly_fig['layout'])
            annotation = go.Annotation(
                text=props['text'],
                font=go.Font(
                    color=props['style']['color'],
                    size=props['style']['fontsize']
                ),
                xref='paper',
                yref='paper',
                x=x,
                y=y,
                xanchor='center',
                yanchor='bottom',
                showarrow=False  # no arrow for a title!
            )
            self.plotly_fig['layout']['annotations'] += annotation,
        else:
            self.msg += "          Only one subplot found, adding as a " \
                        "plotly title\n"
            self.plotly_fig['layout']['title'] = props['text']
            titlefont = go.Font(
                size=props['style']['fontsize'],
                color=props['style']['color']
            )
            self.plotly_fig['layout']['titlefont'] = titlefont