如何使用CustomJS更新散景源

Question

我在尝试更新散景源时使用“选择”小部件和自定义JS时遇到了一些问题。在这种情况下，CustomJS是强制性要求，因此不能使用def：函数。下面的代码返回数据可视化，但它不会刷新，因为我想，JS代码没有正确编写，我没有办法调试它（如果有人知道如何，请它确实是我能得到的最好的答案）。主要思想是根据“选择”微件上选择的值过滤我的源。任何想法？？source = ColumnDataSource(data=dict(    x=gx,    y=gy,    recty=recty,    colors=colors,    filter_info= filter_info))select = Select(title="Option:", value="All", options=["All", "1", "2", "3", "4", "5", "6+"])renderer_source = source# Add the slidercode = """    var value_filter_info = cb_obj.value;    if value_assignments == 'All' {       new_source_data['x'] =  source.data['x'];      new_source_data['y'] =  source.data['y'];      new_source_data['recty'] =  source.data['recty'];      new_source_data['colors'] =  source.data['colors'];    } else {      new_source_data['x'] =  source.data['x'][source.data['filter_info']==value_filter_info];      new_source_data['y'] =  source.data['y'][source.data['filter_info']==value_filter_info];      new_source_data['recty'] =  source.data['recty'][source.data['filter_info']==value_filter_info];      new_source_data['colors'] =  source.data['colors'][source.data['filter_info']==value_filter_info];    }    renderer_source.data= new_source_data;    renderer_source.change.emit();"""callback = CustomJS(args=dict(source=source, renderer_source=renderer_source), code=code)select.js_on_change('value', callback)p = figure(plot_width=1200, plot_height=400, x_range=(0,100), y_range=(0,1000))p.rect(x='x', y='recty',  width=1, height=1, color='colors', source=renderer_source, line_color=None, fill_alpha=1, width_units="data", height_units="data")plot_layout = column(select,p)show(plot_layout)output_notebook()

Answer 1

因此，我找到了一个解决方案，可以在美学上，程序上和视觉上得到改善，但至少结果已经显示出来。

遵循@bigreddot关于索引和覆盖的建议，我设法编写了当前的CustomJS代码：

code = """

    var render=renderer_source.data;

    var data=source.data;

    var data_assignment = data['assignments']; 

    var value_assignments = cb_obj.value; 

    var data_x=data['x'];

    var data_y=data['y'];

    var data_recty=data['recty'];

    var data_colors=data['colors'];

    var render_x=render['x'];

    var render_y=render['y'];

    var render_recty=render['recty'];

    var render_colors=render['colors'];

    var x = [];

    var y = [];

    var recty = [];

    var colors = [];

    render_x=[];

    render_y=[];

    render_recty=[];

    render_colors=[];

    for (var i=0;i<data_assignment.length; i++){

        if (value_assignments == 'All') { 

          x.push(data_x[i]);

          y.push(data_y[i]);

          recty.push(data_recty[i]);

          colors.push(data_colors[i]);

        } else if (data_assignment[i]==value_assignments) {

          x.push(data_x[i]);

          y.push(data_y[i]);

          recty.push(data_recty[i]);

          colors.push(data_colors[i]);

        }

    }

    renderer_source.data['x']=x;

    renderer_source.data['y']=y;

    renderer_source.data['recty']=recty;

    renderer_source.data['colors']=colors;

    renderer_source.change.emit();

"""