[frameworks-kio] [Bug 359233] Improve usability of "Open with > Other" file dialog

[David Faure]

https://bugs.kde.org/show_bug.cgi?id=359233

--- Comment #9 from David Faure <faure at kde.org> ---
Git commit 0296b89714ce96b247322d9be09b387573d79193 by David Faure, on behalf
of Simone Gaiarin.
Committed on 15/07/2017 at 12:53.
Pushed by dfaure into branch 'master'.

Make advanced options of "open with" dialog collabsible and hidden by default

The current "open with" dialog implementation does not follow the KDE principle
"Simple by default, powerful when needed" for the following reasons:
- The "run in terminal" and "keep terminal open" options are advanced options
and should not be exposed by default
- The primary goal of the dialog should be to select an application from the
app tree, running command is an advanced feature

My patch changes the behavior as follow:

* Put the two options in a KCollapsibleComboBox collapsed by default
* The user can expand it only if he needs to use a command line command

Implementation details:
- When the KCollapsibleComboBox is clicked it is expanded upward keeping the
dialog size fixed and compressing the treeview, I'm not sure this is the best
approach, but to make it expand downwards we need to fix the size of the dialog
with setSizeConstraint(QLayout::SetFixedSize); which may not be desiderable.
Maybe there is a way to keep the dialog resizable and expand the combobox
downwards, but I couldn't find it.
- I've increased the vertical size of the dialog (which I think it was too
small) also to accomodate the upward expansion which otherwise would make the
app tree almost disappear

Relevant discussions:
https://forum.kde.org/viewtopic.php?f=285&t=131014
REVIEW: 130180

M  +24   -11   src/widgets/kopenwithdialog.cpp

https://commits.kde.org/kio/0296b89714ce96b247322d9be09b387573d79193

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