[Bug 1972107] Re: Claws Mail under KDE - message list dims when main window loses focus

[Little Girl]

** Description changed:

  The text in the message list pane in Claws Mail is greyed-out when the
  Claws Mail main window loses focus, either by opening a child window
  within Claws Mail or by putting the focus onto any other window. The
  normal text-color is only restored by leaving the current folder that
  has the greyed-out messages and then returning to it.
  
  Here is an animated GIF file showing the behavior:
  https://imgur.com/a/IQ97IVY
  
+ Note: I forgot to demonstrate, in that animated GIF, that closing the
+ Notes window that triggered the issue doesn't restore the text color
+ that was lost on opening it.
+ 
  In that GIF, the Inbox is selected and the message list contains
  messages with colored text. I then open the Notes widget, which causes
  Claws Mail to lose focus and the message list text to be greyed-out. I
  then leave the Inbox and open the Sent folder for a moment and then
  leave the Sent folder and open the Inbox folder again, at which point,
  the text color is restored.
  
  The environment that this is occuring in is:
- 	* Kubuntu release: Kubuntu 22.04 LTS
- 	* KDE Plasma Version 5.24.4
- 	* KDE Frameworks Version: 5.92.0
- 	* Qt Version: 5.15.3
- 	* Graphics Platform X11
- 	* Theme: Breeze
- 	* GTK Theme: Default
- 	* Claws Mail version: 4.0.0
-  
- This is on a bare-metal full installation (not an upgrade) of Kubuntu on a desktop computer. I used the Muon package manager to install Claws Mail.
+  * Kubuntu release: Kubuntu 22.04 LTS
+  * KDE Plasma Version 5.24.4
+  * KDE Frameworks Version: 5.92.0
+  * Qt Version: 5.15.3
+  * Graphics Platform X11
+  * Theme: Breeze
+  * GTK Theme: Default
+  * Claws Mail version: 4.0.0
+ 
+ This is on a bare-metal full installation (not an upgrade) of Kubuntu on
+ a desktop computer. I used the Muon package manager to install Claws
+ Mail.
  
  I would expect the text color of the message list to be unaffected by
  the loss of focus of the Claws Mail main window. Or, if that's
  unavoidable, I would expect the colors to be restored automatically when
  the Claws Mail main window again regains focus.
  
  It's possibly rather significant that all other GTK programs on my
  system are behaving normally and do not exhibit this behavior. The
  author of Claws Mail, however, suggests that a KDE setting is causing
  this issue: https://lists.claws-
  mail.org/pipermail/users/2022-May/030087.html
  
  As a result, I've tried fiddling with enabling and disabling various
  settings in the System Settings -> Workspace Behavior -> Desktop Effects
  section with no improvement. I've also tried creating and fiddling with
  various settings in System Settings -> Window Management -> Window Rules
  -> Window settings for claws-mail with no improvement.
  
  Any suggestions for what I can try next would be appreciated.

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https://bugs.launchpad.net/bugs/1972107

Title:
  Claws Mail under KDE - message list dims when main window loses focus

Status in software-properties package in Ubuntu:
  New

Bug description:
  The text in the message list pane in Claws Mail is greyed-out when the
  Claws Mail main window loses focus, either by opening a child window
  within  Claws Mail or by putting the focus onto any other window. The
  normal text-color is only restored by leaving the current folder that
  has the greyed-out messages and then returning to it.

  Here is an animated GIF file showing the behavior:

  https://imgur.com/a/IQ97IVY

  Note: I forgot to demonstrate, in that animated GIF, that closing the
  Notes window that triggered the issue doesn't restore the text color
  that was lost on opening it.

  In that GIF, the Inbox is selected and the message list contains
  messages with colored text. I then open the Notes widget, which causes
  Claws Mail to lose focus and the message list text to be greyed-out. I
  then leave the Inbox and open the Sent folder for a moment and then
  leave the Sent folder and open the Inbox folder again, at which point,
  the text color is restored.

  The environment that this is occuring in is:
   * Kubuntu release: Kubuntu 22.04 LTS
   * KDE Plasma Version 5.24.4
   * KDE Frameworks Version: 5.92.0
   * Qt Version: 5.15.3
   * Graphics Platform X11
   * Theme: Breeze
   * GTK Theme: Default
   * Claws Mail version: 4.0.0

  This is on a bare-metal full installation (not an upgrade) of Kubuntu
  on a desktop computer. I used the Muon package manager to install
  Claws Mail.

  I would expect the text color of the message list to be unaffected by
  the loss of focus of the Claws Mail main window. Or, if that's
  unavoidable, I would expect the colors to be restored automatically
  when the Claws Mail main window again regains focus.

  It's possibly rather significant that all other GTK programs on my
  system are behaving normally and do not exhibit this behavior. The
  author of Claws Mail, however, suggests that a KDE setting is causing
  this issue:

  https://lists.claws-mail.org/pipermail/users/2022-May/030087.html

  As a result, I've tried fiddling with enabling and disabling various
  settings in the System Settings -> Workspace Behavior -> Desktop
  Effects section with no improvement. I've also tried creating and
  fiddling with various settings in System Settings -> Window Management
  -> Window Rules -> Window settings for claws-mail with no improvement.

  Any suggestions for what I can try next would be appreciated.

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