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Translucent background to track name (on Mac)

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Mac only, as mac supports translucent brushes by default.
wxWidgets makes using a wxDC and wxGraphicContext at the same time
complex and slow.  Hence just for mac.
This commit is contained in:
James Crook
2019-03-29 22:06:03 +00:00
parent 3760db9dff
commit 8b9518a90a
3 changed files with 10 additions and 5 deletions
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6
src/AColor.cpp
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@@ -26,6 +26,7 @@ It is also a place to document colour usage policy in Audacity
#include <wx/colour.h>
#include <wx/dc.h>
#include <wx/dcmemory.h>
#include <wx/graphics.h>
#include <wx/settings.h>
#include <wx/utils.h>
@@ -291,7 +292,9 @@ void AColor::BevelTrackInfo(wxDC & dc, bool up, const wxRect & r, bool highlight
// Set colour of and select brush and pen.
// Use -1 to omit brush or pen.
// If pen omitted, then the same colour as the brush will be used.
void AColor::UseThemeColour( wxDC * dc, int iBrush, int iPen )
// alpha for the brush is normally 255, but if set will make a difference
// on mac (only) currently.
void AColor::UseThemeColour( wxDC * dc, int iBrush, int iPen, int alpha )
{
if (!inited)
Init();
@@ -301,6 +304,7 @@ void AColor::UseThemeColour( wxDC * dc, int iBrush, int iPen )
wxColour col = wxColour(0,0,0);
if( iBrush !=-1 ){
col = theTheme.Colour( iBrush );
col.Set( col.Red(), col.Green(), col.Blue(), alpha);
spareBrush.SetColour( col );
dc->SetBrush( spareBrush );
}