Amebis/wxWidgets
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Implement platform-specific coordinate conversion functions

Browse Source 
Generic wxDC::DeviceToLogical{X|Y}() and wxDC::LogicalToDevice{X|Y}()
functions don't take into account transformations applied with
wxDC::SetTransformMatrix() so conversion results are invalid if wxDC is
transformed with both e.g. wxDC::SetUserScale() and
wxDC::SetTransformMatrix().
We need to implement functions in wxDCImpl and its platform-specific
derivates to do this conversion with taking into account all applied
transformations.

See #18916.
This commit is contained in:
Artur Wieczorek
2020-09-13 23:47:26 +02:00
parent 4ebfe0059a
commit 014bd2ae54
6 changed files with 59 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
include/wx/dcgraph.h
View File

@@ -121,6 +121,10 @@ public:
virtual void ResetTransformMatrix() wxOVERRIDE;
#endif // wxUSE_DC_TRANSFORM_MATRIX
// coordinates conversions and transforms
virtual wxPoint DeviceToLogical(wxCoord x, wxCoord y) const wxOVERRIDE;
virtual wxPoint LogicalToDevice(wxCoord x, wxCoord y) const wxOVERRIDE;
// the true implementations
virtual bool DoFloodFill(wxCoord x, wxCoord y, const wxColour& col,
wxFloodFillStyle style = wxFLOOD_SURFACE) wxOVERRIDE;
@@ -225,6 +229,7 @@ protected:
bool m_logicalFunctionSupported;
wxGraphicsMatrix m_matrixOriginal;
wxGraphicsMatrix m_matrixCurrent;
wxGraphicsMatrix m_matrixCurrentInv;
#if wxUSE_DC_TRANSFORM_MATRIX
wxAffineMatrix2D m_matrixExtTransform;
#endif // wxUSE_DC_TRANSFORM_MATRIX