2b50c8bec0
Outside tests, all in-tree callers of QObject::findChildren() pass no
name to match, and in my experience that is also true for the vast
majority of out-of-tree users.
Avoid the temporary QString creation in the caller and the repeated
QString::isNull() checks in the implementation by overloading
findChildren() without a name argument and checking for name.isNull()
only once, forking off into separate helper functions.
Adjust in-tree callers that used an explicit `QString()` argument in
order to pass options, which goes to show that `name` should never
have been the first argument of findChilden() in the first place, even
though I appreciate the symmetry with findChild() (the use-cases of
which, however, are radically different).
Change a `findChildren().size() == 0` call found while scanning for
findChildren() calls to `!findChild()` as a drive-by.
Modernize loops in the various qt_qFindChild{,ren}_helper() overloads
to match how the new code looks.
[ChangeLog][QtCore][QObject] Added findChildren() overload taking no
name (thus optimizing this common case).
Change-Id: Ifc56e5438023d079b40c67f11ae274a3e128ad5e
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
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| .. | ||
| affine | ||
| basicdrawing | ||
| composition | ||
| concentriccircles | ||
| deform | ||
| fontsampler | ||
| gradients | ||
| imagecomposition | ||
| painterpaths | ||
| pathstroke | ||
| shared | ||
| transformations | ||
| .prev_CMakeLists.txt | ||
| CMakeLists.txt | ||
| painting.pro | ||
| README | ||
Qt's painting system is able to render vector graphics, images, and outline font-based text with sub-pixel accuracy accuracy using anti-aliasing to improve rendering quality. These examples show the most common techniques that are used when painting with Qt, from basic concepts such as drawing simple primitives to the use of transformations. Documentation for these examples can be found via the Examples link in the main Qt documentation.