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gr_basic.cpp: ensure a pen with width = 0 is transparent. 

Setting its color to COLOR4D::UNSPECIFIED (i.e. opacity = 0) is not enough
for all  platforms (i.e. Windows)
This commit is contained in:
jean-pierre charras 2023-02-21 20:06:54 +01:00
parent 543a3317b4
commit d07738a06c
1 changed files with 16 additions and 10 deletions
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8
common/gr_basic.cpp
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@ -101,6 +101,12 @@ void GRSetColorPen( wxDC* DC, const COLOR4D& Color, int width, wxPenStyle style
if( !curr_pen.IsOk() || curr_pen.GetColour() != color.ToColour()
|| curr_pen.GetWidth() != width || curr_pen.GetStyle() != style )
{
if( width == 0 )
// COLOR4D::UNSPECIFIED (i.e. opacity = 0) does not work on all platforms
// So ensure the pen is transparent
DC->SetPen( *wxTRANSPARENT_PEN );
else
{
wxPen pen;
pen.SetColour( color.ToColour() );
@ -113,7 +119,7 @@ void GRSetColorPen( wxDC* DC, const COLOR4D& Color, int width, wxPenStyle style
pen.SetWidth( width );
pen.SetStyle( style );
DC->SetPen( pen );
}
}
else
{