.. _changelog_ide_v1_5_1:

v1.5.1
======

v1.5.1 is a maintenance release built on Qt Creator 4.0.2 that fixes a Python
syntax-highlighter hang, corrects the startup load order so saved UI state is
restored before the rest of plugin initialization, and refreshes the
Feature-Detection keypoints examples. There are no breaking changes.

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Highlights
----------

- **Syntax-highlighter hang fixed** for Python member access and OpenMV
  argument keywords.
- **Correct startup load order** so saved UI state (editor layout, framebuffer
  zoom, histogram and output-window settings, saved terminals) is restored
  before the rest of plugin initialization.
- **Updated keypoints examples** with VGA windowing, higher contrast, a lower
  keypoint threshold, and error handling in ``keypoints_save.py`` when no
  keypoints are found.

Other changes and improvements
------------------------------

- Reworked the **Feature-Detection keypoints examples**
  (``09-Feature-Detection/keypoints.py`` and ``keypoints_save.py``). Both now
  use VGA with 320x240 windowing, higher contrast, a lower ``find_keypoints``
  threshold, and a 1.2 scale factor; ``keypoints.py`` also tightens its match
  gates (``match_descriptor`` threshold 80 to 85, match count 5 to 10), and
  ``keypoints_save.py`` gains a guard that raises an exception when no
  keypoints are found, plus a trailing ``raise`` prompting the user to reset
  the camera once it is done
  (`acc4e1696 <https://github.com/openmv/qt-creator/commit/acc4e1696>`__).

Bug fixes
---------

- Fixed a hang in the Python syntax highlighter caused by the
  generic-highlighter rules that matched member access and OpenMV argument
  keywords; the ``.member`` match rule was adjusted to allow optional
  whitespace after the dot (``\.[a-zA-Z_]...`` became ``\.\s*[a-zA-Z_]...``)
  and the looping ``OpenMVArguments`` rules were changed to ``#pop`` to avoid
  an infinite loop
  (`acc4e1696 <https://github.com/openmv/qt-creator/commit/acc4e1696>`__).
- Fixed the startup load order so that saved UI state (editor and splitter
  layout, framebuffer zoom, JPEG-compress and disable-frame-buffer toggles,
  histogram color space, output-window font zoom, and saved terminals) and the
  application-resource extraction now run earlier in
  ``OpenMVPlugin::extensionsInitialized()``, before the rest of plugin
  initialization
  (`9536b718b <https://github.com/openmv/qt-creator/commit/9536b718b>`__).

Platform and tool support
-------------------------

- **Qt Creator base:** 4.0.2.

Breaking changes
----------------

None. This is a patch release with no user-visible workflow or behavior
changes.