[kmail2] [Bug 346946] New: Regression in 4.14.6 compared to 4.14.2: Single click does not work any more in message structure view

[Gunter Ohrner]

https://bugs.kde.org/show_bug.cgi?id=346946

            Bug ID: 346946
           Summary: Regression in 4.14.6 compared to 4.14.2: Single click
                    does not work any more in message structure view
           Product: kmail2
           Version: unspecified
          Platform: Kubuntu Packages
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: UI
          Assignee: kdepim-bugs at kde.org
          Reporter: kdebugs at CustomCDROM.de

Since my recent upgrade to Kubuntu 15.04 and Kubuntu Backports PPA, KDE's
single click does not work any more in the message structure view. (Enable in
View menu, "Show message structure".)

Installed are KDE Applications 15.04 with kMail 4.14.6 (Unfortunately this
version is not present in the version selector list box here in Bugzilla).

It worked fine with KDE Applications 14.12 and kMail 4.14.2 in Kubuntu 14.10
before.

Reproducible: Always

Steps to Reproduce:
1. Enable Message structure view in View menu.
2. Select a message with consists of multiple MIME parts, eg. an combined
HTML/text mail.
3. Click on of the message parts in the structure view.

Actual Results:  
The part gets selected in the structure view. The displayed contents in the
message window do not change.

Expected Results:  
The part gets selected in the structure view and the displayed contents update
to show the selected message part only. (This has been the behaviour in kMail
4.14.2 and before.)

If you double click the message part in kMail 4.14.6, the content view changes
/ updates, but unfortunately and contrary to my KDE settings, a single click is
not sufficient.

Single clicking in the folder tree and message list works as expected.

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