bf515d769a
When using both wxEnhMetaFileDC (used for print preview) and
wxPrinterDC, a global scale factor was applied to the graphics context
in wxGDIPlusPrintingContext ctor and this changes size of the text
rendered using size specified in point units.
To prevent this from happening, stop applying this scale factor in the
base class GetTextExtent() and apply it instead when setting fonts in
the derived wxGDIPlusPrintingContext only. This ensures that the results
are consistent between GetTextExtent() and DrawText() and also keeps
the font scale hack entirely in wxGDIPlusPrintingContext without
affecting the base class.
It's still not totally clear why do we have to do this at all even
although we specify the font sizes in UnitPoint units which ought to be
DPI-independent -- but somehow are not. But at least the output is
correct now and the code is arguably more clear than before.
This fixes a regression with text size when printing or previewing
introduced by d5020362ff
Closes #18338.
About
wxWidgets is a free and open source cross-platform C++ framework for writing advanced GUI applications using native controls.
wxWidgets allows you to write native-looking GUI applications for all the major desktop platforms and also helps with abstracting the differences in the non-GUI aspects between them. It is free for the use in both open source and commercial applications, comes with the full, easy to read and modify, source and extensive documentation and a collection of more than a hundred examples. You can learn more about wxWidgets at https://www.wxwidgets.org/ and read its documentation online at https://docs.wxwidgets.org/
Platforms
This version of wxWidgets supports the following primary platforms:
- Windows XP, Vista, 7, 8 and 10 (32/64 bits).
- Most Unix variants using the GTK+ toolkit (version 2.6 or newer or 3.x).
- OS X (10.7 or newer) using Cocoa (32/64 bits).
Most popular C++ compilers are supported including but not limited to:
- Microsoft Visual C++ 2003 or later (up to 2017).
- g++ 3.4 or later, including MinGW/MinGW-64/TDM under Windows.
- Clang under OS X and Linux.
- Intel icc compiler.
- Oracle (ex-Sun) aCC.
Licence
wxWidgets licence is a modified version of LGPL explicitly allowing not distributing the sources of an application using the library even in the case of static linking.
Building
For building the library, please see platform-specific documentation under
docs/<port> directory, e.g. here are the instructions for
wxGTK, wxMSW and
wxOSX.
If you're building the sources checked out from Git, and not from a released version, please see these additional Git-specific notes.
Further information
If you are looking for community support, you can get it from
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(tag your questions with
wxwidgets) - And you can report bugs at https://trac.wxwidgets.org/newticket
Commercial support is also available.
Finally, keep in mind that wxWidgets is an open source project collaboratively developed by its users and your contributions to it are always welcome. Please check our guidelines if you'd like to do it.
Have fun!
The wxWidgets Team.