* Start: Add caching for performance for thumbnails on start page
So currently we can have a problem where we are trying to load whole
image as a thumbnail, which can result in over 256MB~ of internal buffer
memory. Also, even if we load smaller size - every now and then start
page gets refreshed, so to check if any file got modified and refresh it
in recent files. This is okay, but with large files it loads them over
and over, resulting in start page lagging.
Solution for that is first - load image thumbnails as scaled, small
images instead of full image.
Second - for performance, use caching by using `path:modtime:size` key.
If the item fits this key, it means it didn't change, so just proceed
further and get this item from the cache. If the key is different, it
means it has been changed on the disk, so reload it.
* Start: Deactivate Start page if it loses focus to stop receiving events
As the title says. This prevents Start page from processing unnecessary
events (mostly paint ones that were causing extreme lag previously) if
it is not opened.
* Start: Preserve aspect ratio of the image for the thumbnail
* Start: use brace initialization when returning QString
* [pre-commit.ci] auto fixes from pre-commit.com hooks
for more information, see https://pre-commit.ci
---------
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
* Start: Walks the parent tree to close the tab
We're currently closing the entire app, it seems a mistake.
Instead, we should look up the widget tree to find the tab
(QMdiSubWindow) and close it instead.
The way I put if we don't find it we don't do anything.
Might be unexpected but at least harmless.
A side effect of this fix is a required drop of constness of
multiple helper methods that call postStart().
* Start: Minor code cleanup and PCH fix
---------
Co-authored-by: Carlos Nihelton <cn@ubuntu.com>
Co-authored-by: Chris Hennes <chennes@gmail.com>
Procedure to trigger the crash:
* Create a document
* Create a spreadsheet and open it
* Close the 3D view
* Open the Start page
* It may or may not crash but the program is in an undefined state
The reason of the crash is caused by an inappropriate use of static_cast.
This bug is caused by PR 17152.
To fix the crash use dynamic_cast instead. If the cast fails it returns
a null pointer instead of a dangling pointer.
Fixes: Maintaining schemas is difficult and error-prone
- Facilitate easy schemas add, remove, change, etc.
- Remove 14 files containing approx 2,190 lines of if/else code and data
- Place data in one file (UnitsSchemasData.h) using a normalized structure (including special functions)
- Isolate and simplify data operations (code)
- Remove schemas enum to keep data independent of code
- Separate responsibilities: Specifications, data, schemas, schema
- Add schema data 'isDefault'
- Add schema data name
- Prefer algorithms to raw loops
- Add schemas unit tests
- Tweak quantity unit tests
* Update tooltip to indicate support for multiple custom folder paths
* Remove migration step that worked around lack of multiple folder support
* Remove obsolete migration method
* Address linter warnings: build/include_what_you_use
* Add QStringList as requested on https://github.com/FreeCAD/FreeCAD/pull/19948/files#r1982267583
