* Fix optimized bitmap grid drawing method.
* Enable optimized grid drawing method on Windows and Linux.
* Create a helper class for resetting and restoring device context scale
and origin settings for blitting purposes.
* Use wxLogTrace instead of wxLogDebug for coordinate dumping in
drawpanel.cpp. See comments for more information on enabling coordinate
tracing.
* Add flag to allow hiding the drawing cross hair. Hide cross hair by
default on OSX.
* Move get cross hair device position code from draw panel object to base
screen object.
* Remove redundant parent member variable from draw panel object by
overriding wxWindow::GetParent() method.
* Remove all occurrences if #ifdef USE_WX_ZOOM and all associated code within
the #else/#endif block ( old zoom code ).
* Removed the build option for USE_WX_ZOOM from CMakeList.txt and config.h.in.
* Removed all scaling code in base screen object.
* Fixed buffered paint and buffered client DC on Windows. Buffering works
properly on Linux and Windows.
* Modified kicad_device_context.h to automatically uses buffering on platforms
where double buffering is supported natively.
* Remove all of the scaled versions of the drawing functions in gr_basic.cpp
and any support code.
* Removed all traces of ActiveScreen global variable from eeschema and
gerbview.
* Renamed Recadre_Trace to RedrawScreen in draw frame object.
* Renamed PostDirtyRect to RefreshDrawingRect in draw panel object.
* Lots of code cleaning an Doxygen comment improvements.
* Make USE_WX_ZOOM clipping routine actually clip rather than just test
if line needs drawn.
* Clean up as many USE_WX_ZOOM #ifdefs as possible.
* Minor coordinate rounding improvements.
* Minor scrolling and panning improvements.
* Remove unused KicadGraphicContext object code.
* Implement code to allow wxDC to handle coordinate conversions between
device and drawing units.
* Add build settings to enable wxGCDC for wxGraphicsContext testing.
* Remove wxAUI conditional build cruft as it is now required to build
Kicad.
* Fix scroll increment size regression to prevent jumping around the
zoom center position.
* Add find GDI+ cmake module for building on WXMSW when wxGraphicsContext
is enabled.
Wayne Stambaugh
Dick Hollenbeck
stambaughw