Bar Plot: New widget

Author: VesnaT

Orange/widgets/utils/__init__.py

@@ -2,6 +2,7 @@
 import sys
 from collections import deque
 from typing import TypeVar, Deque, Callable, Any, Iterable
+from xml.sax.saxutils import escape
 
 from AnyQt.QtCore import QObject
 
@@ -23,7 +24,7 @@ def vartype(var):
 
 
 def progress_bar_milestones(count, iterations=100):
-    return set([int(i*count/float(iterations)) for i in range(iterations)])
+    return set(int(i*count/float(iterations)) for i in range(iterations))
 
 
 def getdeepattr(obj, attr, *arg, **kwarg):
@@ -32,8 +33,8 @@ def getdeepattr(obj, attr, *arg, **kwarg):
     return deepgetattr(obj, attr, *arg, **kwarg)
 
 
-def to_html(str):
-    return str.replace("<=", "&#8804;").replace(">=", "&#8805;").\
+def to_html(str_):
+    return str_.replace("<=", "&#8804;").replace(">=", "&#8805;").\
         replace("<", "&#60;").replace(">", "&#62;").replace("=\\=", "&#8800;")
 
 getHtmlCompatibleString = to_html
@@ -90,3 +91,24 @@ def apply_all(seq, op):
     """Apply `op` on all elements of `seq`."""
     # from itertools recipes `consume`
     deque(map(op, seq), maxlen=0)
+
+
+def instance_tooltip(domain, row, skip_attrs=()):
+    def show_part(_point_data, singular, plural, max_shown, _vars):
+        cols = [escape('{} = {}'.format(var.name, _point_data[var]))
+                for var in _vars[:max_shown + 2]
+                if _vars == domain.class_vars
+                or var not in skip_attrs][:max_shown]
+        if not cols:
+            return ""
+        n_vars = len(_vars)
+        if n_vars > max_shown:
+            cols[-1] = "... and {} others".format(n_vars - max_shown + 1)
+        return \
+            "<b>{}</b>:<br/>".format(singular if n_vars < 2 else plural) \
+            + "<br/>".join(cols)
+
+    parts = (("Class", "Classes", 4, domain.class_vars),
+             ("Meta", "Metas", 4, domain.metas),
+             ("Feature", "Features", 10, domain.attributes))
+    return "<br/>".join(show_part(row, *columns) for columns in parts)