[FIX] Warning about a window title without a placeholder

[thocevar]

Issue

Fixes #3267

Description of changes

Append "[*]" placeholder to the window title (if it's not already present) before calling setWindowTitle.

Includes

• Code changes
• Tests
• Documentation

[ales-erjavec]

The warning in gh-3267 probably comes from CanvasMainWindow not OWWidget. That uses windowFilePath.

Maybe try:

diff --git a/Orange/canvas/application/canvasmain.py b/Orange/canvas/application/canvasmain.py
index 4d0cee46c..500100a80 100644
--- a/Orange/canvas/application/canvasmain.py
+++ b/Orange/canvas/application/canvasmain.py
@@ -230,7 +230,7 @@ class CanvasMainWindow(QMainWindow):
         frame.setWidget(self.scheme_widget)
 
         # Window 'title'
-        self.setWindowFilePath(self.scheme_widget.path())
+        self.setWindowFilePath(self.scheme_widget.path() or " ")
         self.scheme_widget.pathChanged.connect(self.setWindowFilePath)
         self.scheme_widget.modificationChanged.connect(self.setWindowModified)
 

[thocevar]

You're right.

[codecov]

Codecov Report

Merging #3554 into master will decrease coverage by <.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #3554      +/-   ##
==========================================
- Coverage   83.96%   83.95%   -0.01%     
==========================================
  Files         370      370              
  Lines       66876    66876              
==========================================
- Hits        56152    56146       -6     
- Misses      10724    10730       +6