Provide a way to retrieve the name of the current system appearance
(mostly for diagnostic purposes) and check if it uses predominantly dark
colours.
Currently this class has a non-trivial (but still very simple)
implementation under macOS only and simply checks whether the default
text colour is brighter than the default background colour under the
other platforms, but other platform-specific implementations could be
added later.
Also update the drawing sample "system colours" page to show the system
appearance as well.
Add the handler earlier, as creating the handler main frame uses
wxArtProvider::GetBitmap() which can add the PNG handler on some
platforms (e.g. macOS, when using wxTangoArtProvider), so calling
wxImage::AddHandler() again after creating the frame could result in a
debug error message about adding the same handler twice.
Pass wxStrings directly to wxString::Format("%s") and similar
pseudo-vararg functions, there is no need for c_str() there since
wxWidgets 2.9.
Closes https://github.com/wxWidgets/wxWidgets/pull/1009
The use of wxS() is an optimization which can be used to avoid an
implicit conversion from narrow to wide strings, but such optimizations
are not really needed in the samples and just make their code less
readable, so remove them.
Closes https://github.com/wxWidgets/wxWidgets/pull/956
When using an out of source build, the files are not in the default wxWidgets directories.
Also search in the current directory, parent directory and sample sub-directories.
Closes https://trac.wxwidgets.org/ticket/18118
Advanced gradients are drawn using wxGraphicsContext and hence bounding box for underlying wxDC is not updated automatically. We need to update bounding box with extents of all used graphics paths.
Determine actual size of drawing area and use it (instead of virtual size of the window) as a dimension of the images to be saved. Thanks to this clipping, produced images contain only results of drawing operations and not lot of empty background space.
This adds an additional screen to the drawing sample showing all available wxSystemColour values. It makes sense for testing these values but also provides a convenient overview of available colours for the library user.
For some systems (like OS X, GTK+ 3) drawing with transparency is supporting by native wxDC and in this case "Alpha screen" sample can be shown even if wxGraphicsContext is not used/enabled. For such wxDC's all drawing operations can be done directly without using wxGraphicsContext.
Because graphics renderer is not only selected via menu but also directly in the application (in MyFrame::OnShow) there is necessary to update menu items responsible for selecting graphics context to represent current state of the application.
This is done in EVT_UPDATE_UI handlers where there is checked what graphics renderer is currently in use and state of the menu items is updated accordingly.
Closes#16971.
It was confusing to not see anything when selecting one of the screens using
wxGraphicsRenderer if a renderer hadn't been selected from the menu before.
Switch to using wxGC automatically now if one of these screens selected and
there was no previously selected renderer.
In particular, allow switching between GDI+ and Direct2D under Windows, which
is very convenient for comparing the rendering results.
This can also be useful when using Cairo.
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@77692 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
No real changes, just make the "File" menu (which was also renamed to
"Drawing" as it has nothing to do with files) less long by splitting off the
screen selection in a separate menu.
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@77691 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This is not only wasteful, but creating a Direct2D surface associated with a
wxDC makes it impossible to paint on the DC using GDI functions, so this
completely broke the initial display in the sample.
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@77690 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This shows inconsistency in handling of radial gradients with and without
stops in current wxMSW GDI+-based wxGraphicsContext implementation.
See #16443.
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@77473 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
