Fix tkinter focus issues on Windows (cztomczak#535).

cztomczak · cztomczak · commit b7f25aa7eecf · 2020-01-12T11:00:47.000+01:00
diff --git a/examples/tkinter_.py b/examples/tkinter_.py
@@ -13,6 +13,8 @@
 # Known issue on Linux: When typing url, mouse must be over url
 # entry widget otherwise keyboard focus is lost (Issue #255
 # and Issue #284).
+# Other focus issues discussed in Issue #535.
+
 
 from cefpython3 import cefpython as cef
 import ctypes
@@ -153,6 +155,7 @@ def __init__(self, master, navigation_bar=None):
         self.bind("<FocusIn>", self.on_focus_in)
         self.bind("<FocusOut>", self.on_focus_out)
         self.bind("<Configure>", self.on_configure)
+        """For focus problems see Issue #255 and Issue #535. """
         self.focus_set()
 
     def embed_browser(self):
@@ -216,8 +219,6 @@ def on_focus_in(self, _):
 
     def on_focus_out(self, _):
         logger.debug("BrowserFrame.on_focus_out")
-        if self.browser:
-            self.browser.SetFocus(False)
 
     def on_root_close(self):
         if self.browser:
@@ -242,6 +243,7 @@ def OnLoadStart(self, browser, **_):
 
 
 class FocusHandler(object):
+    """For focus problems see Issue #255 and Issue #535. """
 
     def __init__(self, browser_frame):
         self.browser_frame = browser_frame
@@ -253,13 +255,10 @@ def OnTakeFocus(self, next_component, **_):
     def OnSetFocus(self, source, **_):
         logger.debug("FocusHandler.OnSetFocus, source={source}"
                      .format(source=source))
-        return False
+        return True
 
     def OnGotFocus(self, **_):
-        """Fix CEF focus issues (#255). Call browser frame's focus_set
-           to get rid of type cursor in url entry widget."""
         logger.debug("FocusHandler.OnGotFocus")
-        self.browser_frame.focus_set()
 
 
 class NavigationBar(tk.Frame):
@@ -340,7 +339,7 @@ def on_load_url(self, _):
             self.master.get_browser().LoadUrl(self.url_entry.get())
 
     def on_button1(self, _):
-        """Fix CEF focus issues (#255). See also FocusHandler.OnGotFocus."""
+        """For focus problems see Issue #255 and Issue #535. """
         logger.debug("NavigationBar.on_button1")
         self.master.master.focus_force()
 
