Add download option for hkl/mhkl files

pyzebra/app/panel_ccl_prepare.py

@@ -8,6 +8,8 @@ from bokeh.layouts import column, row
 from bokeh.models import (
     Button,
     CheckboxGroup,
+    ColumnDataSource,
+    CustomJS,
     DataRange1d,
     Div,
     FileInput,
@@ -25,11 +27,33 @@ from bokeh.models import (
 import pyzebra
 
 
+javaScript = """
+let j = 0;
+for (let i = 0; i < js_data.data['fname'].length; i++) {
+    if (js_data.data['content'][i] === "") continue;
+
+    setTimeout(function() {
+        const blob = new Blob([js_data.data['content'][i]], {type: 'text/plain'})
+        const link = document.createElement('a');
+        document.body.appendChild(link);
+        const url = window.URL.createObjectURL(blob);
+        link.href = url;
+        link.download = js_data.data['fname'][i];
+        link.click();
+        window.URL.revokeObjectURL(url);
+        document.body.removeChild(link);
+    }, 100 * j)
+
+    j++;
+}
+"""
+
 def create():
     ang_lims = None
     cif_data = None
     params = None
     res_files = {}
+    js_data = ColumnDataSource(data=dict(content=[""], fname=[""]))
 
     anglim_div = Div(text="Angular min/max limits:")
     sttgamma_ti = TextInput(title="stt/gamma", width=100)
@@ -223,13 +247,17 @@ def create():
     sorting_go = Button(label="GO", button_type="primary", width=50)
 
     def created_lists_callback(_attr, _old, new):
-        preview_lists.value = res_files[new[0]]
+        sel_file = new[0]
+        file_text = res_files[sel_file]
+        preview_lists.value = file_text
+        js_data.data.update(content=[file_text], fname=[sel_file])
 
     created_lists = MultiSelect(title="Created lists:", width=200, height=150)
     created_lists.on_change("value", created_lists_callback)
     preview_lists = TextAreaInput(title="Preview selected list:", width=600, height=150)
 
     download_file = Button(label="Download file", button_type="success", width=200)
+    download_file.js_on_click(CustomJS(args={"js_data": js_data}, code=javaScript))
     plot_list = Button(label="Plot selected list", button_type="primary", width=200)
 
     measured_data_div = Div(text="Measured data:")