Gnats 5148: Typing values in slots lead to out of order numbers.
RiverWare 6.2 Development -- 1-05-2012.

PRIOR WORK IN THIS AREA:

 Gnats 4844: 'Inline editing of slot values hides significant digits'
 Gnats 4953: 'Typing numbers in slots is behaving incorrectly'
  ... the RwCellQLineEdit class was created to address this bug:

=============================================================================

RCS file: /projects/riverware/builds.cvs/QtUtils/RwCellQLineEdit.cpp,v
Working file: RwCellQLineEdit.cpp

=============================================================================

revision 1.2
date: 2010/09/17 03:04:05;  author: philw;  state: Exp;  lines: +39 -17

Short Description: Fix problem introduced with 4833 last week (in development)
Bug Number: 4953
Release notes (y/n): No. Development bug fix.
For Release Nums: 5.3

Gnats 4953: Typing numbers in slots is behaving incorrectly

Unfortunately, this was broken a week ago in the course of addressing
Gnats 4833 ("Inline editing of slot values hides  significant digits").
[RiverWare 5.3 Development]. This effected both the Open Slot dialog and
the SCT.

There were no discrete events I could find which distinguish the two ways
in which an incell edit is started -- that is, by double-clicking or just
by starting to type.  In the latter case, the edit session is started with
that first key (single character) -- rather than the prior contents of the
cell.  And in that case, we DO NOT want to move the cursor to the left side
(which was introduced in the course of addressing the bug mentioned above,
in order to show the most significant digits of the value being edited).

In the case of starting an edit session by just starting to type, the
QLineEdit widget is first created, and then the key event is delivered
to that widget.  The "4833" fix was implemented by starting a timer
the first time the QLineEdit becomes visible -- and 50 milliseconds later
moving the cursor to the left side.  This provides the opportunity to
cancel the timer (and disable its effect, in case of a race condition)
when processing the (each) key event.  That does the trick.

---------------------------
QtUtils/RwCellQLineEdit.hpp
QtUtils/RwCellQLineEdit.cpp
---------------------------

Added method:
  void RwCellQLineEdit::cancelEditStartFixupTimer();
  ... if the _editStartFixupTimer exists, stop the timer, and delete it
  ... (wiping out the pointer to that timer, of course).

In method: RwCellQLineEdit::keyPressEvent (QKeyEvent*),
  the new method, RwCellQLineEdit::cancelEditStartFixupTimer().

In method: RwCellQLineEdit::editStartFixup(), don't do anything if the
  _editStartFixupTimer doesn't exist. Note: this effect was not readily
  testable.  This is to protect against a race condition (which may or
  may not ever occur) where a timeout event has been posted, but not
  yet serviced at the time a key event is processed.

=============================================================================

revision 1.1
date: 2010/09/09 19:12:33;  author: philw;  state: Exp;

Short Description: SCT and Open Slot Dialog: Incell editing, init pos: LEFT.
Bug Number: 4833
Release notes (y/n): Yes
For Release Nums: 5.3

Gnats 4833: "Inline editing of slot values hides significant digits".

The custom QLineEdit used for incell editing in both the Open Object dialog
and the SCT was enhanced to move the QLineEdit's cursor to the beginning
(left side).

Additionally, the custom QLineEdit classes used in both of those contexts
were replaced by a common class: QtUtils/RwCellQLineEdit.

---------------------------
QtUtils/RwCellQLineEdit.cpp  -- NEW
QtUtils/RwCellQLineEdit.hpp  -- NEW
Q3GUI/SlotQDlgLineEdit.cpp   -- STUBBED OUT, prepare for removal
Q3GUI/SlotQDlgLineEdit.hpp   -- STUBBED OUT, prepare for removal
QtSCT/SctQLineEdit.cpp       -- STUBBED OUT, prepare for removal
QtSCT/SctQLineEdit.hpp       -- STUBBED OUT, prepare for removal
---------------------------

Replaced basically identical custom QLineEdit classes used for incell editing
in both the Open Slot dialog and the SCT with a common QLineEdit
implementation: QtUtils/RwCellQLineEdit:

// RiverWare Qt QLineEdit specialization for incell editing (e.g. in QTable)
//
// FIRST USES (RiverWare 5.3, 9-2010):
//   Q3GUI/SlotQDlgTable (a Q3Table) -- replacement for Q3GUI/SlotQDlgLineEdit
//   QtSCT/SctQTable     (a Q3Table) -- replacement for QtSCT/SctQLineEdit

Added functionality for Gnats 4833: "Inline editing of slot values hides
 significant digits".

After an edit is started, move the QLineEdit's cursor to the beginning
(left side).  This is implemented as a delayed action after the first time
a RwCellQLineEdit instance is shown.

New data members:
  int _showCount;
  QTimer* _editStartFixupTimer;

New methods:
  virtual void showEvent (QShowEvent*);
  void schedEditStartFixupTimer();
  void editStartFixup();

-----------------------
Q3GUI/SlotQDlgTable.cpp
Q3GUI/SlotQDlgTable.hpp
QtSCT/SctQTable.cpp
-----------------------

  Replace Q3GUI/SlotQDlgLineEdit (a QLineEdit) with QtUtils/RwCellQLineEdit
  Replace QtSCT/SctQLineEdit (a QLineEdit) with QtUtils/RwCellQLineEdit

-------------------------------
QtUtils/Make.package
QtUtils/QtUtils.pro
QtUtils/QtUtils.vcproj
QtUtils/QtUtilsGenerated.pro
QtUtils/QtUtilsGenerated.vcproj
-------------------------------

Added QtUtils/RwCellQLineEdit (a QObject) to the builds.

*** TODO: remove from CVS and make files:

  Q3GUI/SlotQDlgLineEdit.cpp   -- STUBBED OUT, prepared for removal
  Q3GUI/SlotQDlgLineEdit.hpp   -- STUBBED OUT, prepared for removal
  QtSCT/SctQLineEdit.cpp       -- STUBBED OUT, prepared for removal
  QtSCT/SctQLineEdit.hpp       -- STUBBED OUT, prepared for removal

=============================================================================