qt5base-lts/examples/widgets/painting
Craig Scott d97fd7af2b Build examples in isolated sub-builds using ExternalProject
Examples are intended to show how to build against an installed Qt.
Building them as part of the main build means the way the Qt targets
are defined and created are not representative of an end user's build.
By building them as separate projects using ExternalProject, we can
more closely replicate the intended audience's environment. This
should allow us to catch more problems earlier.

Having examples built as part of the main build also creates problems
with some static builds where a tool built by the main build is needed
during configure time. This happens with other repos like qtdeclarative
but not (currently) with qtbase. Converting the examples in qtbase to
be built using ExternalProject is intended as a demonstrator for how
other repos can do similar. Until other repos are converted, they will
continue to work as they did before, with examples as part of the main
build for non-static builds only.

The new build-externally behavior is only supported for non-prefix
builds with this change. Prefix builds will continue to use the old
non-external method. Support for building examples externally in
prefix builds will be a separate change.

Task-number: QTBUG-90820
Fixes: QTBUG-91068
Change-Id: I2304329940568dbdb7da18d54d5595ea7d8668bc
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
2021-05-26 13:33:29 +02:00
..
affine Fix BASE argument of qt_add_resources 2021-05-18 16:02:52 +02:00
basicdrawing CMake: Regenerate examples to set the WIN32_EXECUTABLE property 2020-10-27 12:49:39 +01:00
composition Fix BASE argument of qt_add_resources 2021-05-18 16:02:52 +02:00
concentriccircles CMake: Regenerate examples to set the WIN32_EXECUTABLE property 2020-10-27 12:49:39 +01:00
deform Fix BASE argument of qt_add_resources 2021-05-18 16:02:52 +02:00
fontsampler Get rid of all instance usage of QFontDatabase 2020-11-03 20:36:34 +01:00
gradients Fix BASE argument of qt_add_resources 2021-05-18 16:02:52 +02:00
imagecomposition CMake: Regenerate examples to set the WIN32_EXECUTABLE property 2020-10-27 12:49:39 +01:00
painterpaths CMake: Regenerate examples to set the WIN32_EXECUTABLE property 2020-10-27 12:49:39 +01:00
pathstroke Fix BASE argument of qt_add_resources 2021-05-18 16:02:52 +02:00
shared Fix build of standalone painting examples 2021-05-17 17:14:10 +02:00
transformations CMake: Regenerate examples to set the WIN32_EXECUTABLE property 2020-10-27 12:49:39 +01:00
.prev_CMakeLists.txt CMake: Regenerate examples/widgets/ projects 2020-04-29 22:48:38 +02:00
CMakeLists.txt Build examples in isolated sub-builds using ExternalProject 2021-05-26 13:33:29 +02:00
painting.pro don't build shared demo library which is not used anyway 2013-01-31 15:51:09 +01:00
README Moving .qdoc files under examples/widgets/doc 2012-08-20 12:20:55 +02:00

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.