Template Tester: Open second disposable instance

[ownedbycats]

Calibre 6.11* (run from source)

When modifying templates, sometimes it'd be helpful to be able to compare the results of two templates. The option to open a second instance of the tester would help with this.

Save conflicts may be a problem, but perhaps this could be dealt with by making the window explicitly disposable and unable to save upon close. (It may also be a good idea to have it listed as disposable in the titlebar so the user doesn't close the wrong one.)

Thanks in advance.

[Kovid Goyal (kovid)]

Changing the component for this bug.

 assignee
 status

[Charles Haley (cbhaley)]

I am willing to add the ability to open multiple testers, but only using the template tester action. If a tester is open in some special context like a rule or editing a composite template then only one instance will be permitted. Doing otherwise is a huge can of worms.

@kovid: are you OK with non-modal parentless windows? In this case the user can switch back to the standard gui with alt-tab and windows can cover each other.

[Kovid Goyal (kovid)]

Should be fine, thats how the viewer and editor work after all. Although
they use QMainWindow not QDialog. I dont think that should cause any
problems though. Just be sure to call raise_() to ensure the
non-parented window has focus/is on top.