When a different field is edited, hide any old multi-dive-edit
warning message. The reason is that we might want to add an "undo"
button to the message. But this will undo the wrong command if
we don't hide the message.
Sadly, this means that we can't use animated show / hide, because
an animatedHide() followed immediately by an animatedShow() does
not necessarily show the message. In other words, and animatedShow()
does not interupt a started animatedHide()!?
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
The multiple-dives-edited message was shown even if the value was
not changed. Notably, when tab-flipping through the dive fields.
Therefore, changed the execute_edit() function to return zero
when no command was executed. For this, return a boolean from
the execute() function indicating whether the command was really
executed or trashed.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
Properly implement the unsaved-changes flag(s). Since we currently have
two kinds of changes, there are two flags:
1) dive_list_changed in divelist.c marks non-undoable changes. This flag
is only cleared on save or load.
2) QUndoStack::isClean() is used to determine the state of undoable
changes. Every time the user returns to the state where they saved,
this flag is cleared.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
This refactors the undo-commands (which are now only "commands").
- Move everything in namespace Command. This allows shortening of
names without polluting the global namespace. Moreover, the prefix
Command:: will immediately signal that the undo-machinery is
invoked. This is more terse than UndoCommands::instance()->...
- Remove the Undo in front of the class-names. Creating an "UndoX"
object to do "X" is paradoxical.
- Create a base class for all commands that defines the Qt-translation
functions. Thus all translations end up in the "Command" context.
- Add a workToBeDone() function, which signals whether this should be
added to the UndoStack. Thus the caller doesn't have to check itself
whether this any work will be done. Note: Qt5.9 introduces "setObsolete"
which does the same.
- Split into public and internal header files. In the public header
file only export the function calls, thus hiding all implementation
details from the caller.
- Split in different translation units: One for the stubs, one for
the base classes and one for groups of commands. Currently, there
is only one class of commands: divelist-commands.
- Move the undoStack from the MainWindow class into commands_base.cpp.
If we want to implement MDI, this can easily be moved into an
appropriate Document class.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
