Undo: use QUndoStack::isClean() to determine unsaved changes

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 commit is contained in:
Berthold Stoeger 2019-03-30 18:39:27 +01:00 committed by Dirk Hohndel
parent 837ab6c90b
commit 58f2e5f77c
9 changed files with 46 additions and 31 deletions

View file

@ -10,7 +10,10 @@
namespace Command {
// 1) General commands
void init(); // Setup signals to inform frontend of clean status.
void clear(); // Reset the undo stack. Delete all commands.
void setClean(); // Call after save - this marks a state where no changes need to be saved.
bool isClean(); // Any changes need to be saved?
QAction *undoAction(QObject *parent); // Create an undo action.
QAction *redoAction(QObject *parent); // Create an redo action.